A drip prevention device for a pressurized pouring furnace according to the present disclosure is a device 10 that prevents dripping of molten metal from a molten metal outlet of the pressurized pouring furnace The drip prevention device 10 includes: a stopper 20 that brings a lower end thereof into contact with the outlet so as to block the outlet, and is provided so as to be able to rotate about a central axis 20C of the stopper with no rotation angle limitation and move vertically above the outlet; a rotation motor 30 that rotates the stopper 20; a drip detection device 60 that detects dripping of molten metal from the outlet in a case where the dripping occurs; and a control device 70 that, in a case where a drip detection signal is received from the drip detection device 60, drives the rotation motor 30 to cause the stopper 20 to perform a predetermined rotation operation.
A mold used for centrifugal casting includes a mold body formed in a cylindrical shape and a lid member (40) that is detachably assembled to an end part of the mold body in an axial direction. The lid member includes a lid body (41) that is attached to an opening part formed at the end part of the mold body, a protrusion part (450) that is fitted to the mold body, and a spring that applies elastic force to the lid body in a direction in which the lid body closely contacts the mold body.
B22D 13/10 - Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor; Means for feeding molten metal, cleansing moulds or removing castings
B22D 13/12 - Controlling, supervising, specially adapted to centrifugal casting, e.g. for safety reasons
A casting system (10) includes a plurality of mold tables (41 and 42), molten metal pouring trucks (21 and 22), and a molten metal supply furnace (30). The mold tables are each provided with centrifugal casting molds (81 to 84 and 91 to 94). Each molten metal pouring truck can move to the position of each mold table and pour molten metal into the molds installed on the mold table. The molten metal supply furnace supplies molten metal to the molten metal pouring trucks.
B22D 13/10 - Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor; Means for feeding molten metal, cleansing moulds or removing castings
B22D 13/12 - Controlling, supervising, specially adapted to centrifugal casting, e.g. for safety reasons
A device according to the present disclosure is a workpiece retaining device 10 that retains a retained portion 110 of an axial-directional end portion of a workpiece 100 that is cylindrical. The workpiece retaining device 10 includes a core member 32 that is round and that comes into contact an inner perimeter face of the retained portion 110 of the workpiece 100, a pressing member 33 that presses an outer perimeter face of the retained portion 110 of the workpiece 100 to an inner side in a radial direction, and an aligning member 44 that, upon a pressing force from the pressing member 33 acting thereupon, allows the core member 32 to move in the radial direction, in accordance with a magnitude and a direction of the pressing force.
A cooling device (21) includes radiation thermometers (51 to 55), a plurality of nozzle parts, a plurality of electromagnetic valves (V1 to V5), and a control device (60). The radiation thermometers detect pre-cooling temperatures that are temperatures at a plurality of places on the mold before cooling water is sprayed from the plurality of nozzle parts to the mold. The control device individually sets a cooling time to each of the plurality of places on the mold based on a deviation between the pre-cooling temperature at the place on the mold and a target temperature and controls the electromagnetic valves based on the cooling times individually set to the plurality of respective places on the mold.
B22D 13/10 - Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor; Means for feeding molten metal, cleansing moulds or removing castings
B22D 13/12 - Controlling, supervising, specially adapted to centrifugal casting, e.g. for safety reasons
6.
CYLINDER LINER AND RECIPROCATING ENGINE COMPRISING CYLINDER LINER
The present invention makes it possible to improve recyclability, achieve a reduction in weight, and improve environmental friendliness. To this end, a cylinder liner (30) according to the present disclosure is provided only to a part of a region of an inner surface (21i) of a cylinder (21) in a reciprocating engine, said region being where a piston ring (50) fitted to a piston (40) that reciprocates in the cylinder (21) slides. The total length L of the liner along the axial direction of the cylinder (21) is less than the inner diameter B of the cylinder. One lower end part (30d), which is toward the bottom dead center side of the piston ring (50) in the axial direction, has protrusions and recesses formed therein.
Provided is a cylinder liner which can reduce the friction of the sliding surface from conventional levels and improve fuel efficiency without increasing oil consumption from conventional levels.
When the inner circumferential surface of a cylinder liner or cylinder bore used in an internal combustion engine has a first sliding region, a second sliding region, and a third sliding region, and when respective surface roughness Rvk is from 0.05 μm to 0.3 μm, from 0.4 μm to 1.5 μm, and from 0.15 μm to 0.7 μm, a friction can be reduced while maintaining oil consumption.
Provided is a cylinder having grooving in a cylinder inner circumferential surface. The grooving includes a honed groove and a recessed groove having a larger groove width and a larger groove depth than the honed groove. The honed groove and the recessed groove extend in a cylinder circumferential direction and have an inclination angle in relation to a direction perpendicular to the cylinder axial direction. In a sliding region of an oil ring when a crank angle is from 50º to 140º, the cylinder inner circumferential surface is such that, in the cylinder axial direction, a length of 4 mm in which the recessed groove is present in four or more places can be selected.
The present invention addresses the problem of providing a cylinder liner or a cylinder bore, which can reduce not only friction on a sliding surface but also oil consumption. In a piston sliding direction of the cylinder bore, grooves of a second sliding region positioned on the side of crankcase have a higher groove area ratio at a depth of 0.3 μm than grooves of a first sliding region positioned on the side of combustion chamber, and the groove area ratio is in a specific range, whereby friction and oil consumption can be reduced.
Provided is a spiny liner that may further improve bonding strength when being integrated with metal on the outer peripheral surface side. The spiny liner includes a plurality of projections including constricted projections on the surface. Denoting the number of constricted projections per 100 mm2 out of the projection by Pc, the average height of projections by h (mm), and the average of maximum thicknesses and the average of minimum thicknesses of any 20 projections out of the constricted projections by dw (mm) and dn (mm), respectively, the total value of (I) and (II) below is 1.55 or more.
Provided is a spiny liner that may further improve bonding strength when being integrated with metal on the outer peripheral surface side. The spiny liner includes a plurality of projections including constricted projections on the surface. Denoting the number of constricted projections per 100 mm2 out of the projection by Pc, the average height of projections by h (mm), and the average of maximum thicknesses and the average of minimum thicknesses of any 20 projections out of the constricted projections by dw (mm) and dn (mm), respectively, the total value of (I) and (II) below is 1.55 or more.
(I)=Pc×[(0.35 hπ/12)×(2dw2−dw×dn−dn2)]
Provided is a spiny liner that may further improve bonding strength when being integrated with metal on the outer peripheral surface side. The spiny liner includes a plurality of projections including constricted projections on the surface. Denoting the number of constricted projections per 100 mm2 out of the projection by Pc, the average height of projections by h (mm), and the average of maximum thicknesses and the average of minimum thicknesses of any 20 projections out of the constricted projections by dw (mm) and dn (mm), respectively, the total value of (I) and (II) below is 1.55 or more.
(I)=Pc×[(0.35 hπ/12)×(2dw2−dw×dn−dn2)]
(I)=Pc×{(dn2/4)×r×0.35h}
This dripping prevention device for pressurized pouring furnace is a device 10 for preventing dripping of hot water from the hot water outlet of a pressurized pouring furnace. Said dripping prevention device 10 is provided with: a stopper 20, the bottom end of which contacts the outlet to close said outlet, and which is provided so as to be capable of rising and lowering above the outlet and so as to be capable rotating about the center axis 20C of said stopper without restriction on the rotation angle; a rotation motor 30 which rotates said stopper 20; a dripping detection device 60 which detects dripping when hot water drips from the outlet; and a control device 70 which, in the case that a dripping detection signal has been received from the dripping detection device 60, drives the rotation motor 30 and causes the stopper 20 to perform a prescribed rotation action.
155), and a control device (60). The radiation temperature meters respectively detect, at a plurality of parts of a mold, pre-cooling temperatures which are the temperatures before the plurality of nozzle parts spray the mold with cooling water. On the basis of the deviations between the respective pre-cooling temperatures of the plurality of parts of the mold and corresponding target temperatures, the control device individually sets cooling times for the plurality of parts of the mold. The control device controls the electromagnetic valves on the basis of the respective cooling times which are individually set for the plurality of parts of the mold.
B22D 13/10 - Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor; Means for feeding molten metal, cleansing moulds or removing castings
A casting system (10) is provided with a plurality of mold tables (41, 42), pouring carriages (21, 22), and a pouring furnace (30). The mold tables are provided with centrifugal casting molds (81-84, 91-94). The pouring carriages can move to each position of the mold tables and pour molten metal into the molds provided on the mold tables. The pouring furnace pours molten metal into the pouring carriages.
B22D 13/10 - Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor; Means for feeding molten metal, cleansing moulds or removing castings
14.
CENTRIFUGAL CASTING MOLD AND ASSEMBLING APPARATUS FOR CENTRIFUGAL CASTING MOLD
The present invention provides a mold that is used for centrifugal casting and is provided with a mold body that is formed into a cylindrical shape and a lid member (40) that is detachably attached to an end of the mold body in the axial direction. The lid member is provided with a lid body (41) that is attached to an opening formed in the end of the mold body, a protruding part (450) that is fitted to the mold body, and a spring that provides the lid body with an elastic force in a direction to make the same closely contact with the mold body.
B22D 13/10 - Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor; Means for feeding molten metal, cleansing moulds or removing castings
The device according to the present disclosure is a workpiece holding device 10 for holding a held portion 110 located at an axial-direction end section of a tubular workpiece 100. The workpiece holding device 10 comprises: a circular core member 32 that abuts an inner peripheral surface of the held portion 110 of the workpiece 100; a pressing member 33 that presses an outer peripheral surface of the held portion 110 of the workpiece 100 radially inward; and an aligning member 44 that allows the core member 32 to move in the radial direction, when a pressing force from the pressing member 33 is applied, in response to the size and direction of the pressing force.
Provided are a heat-shielding ring for a cylinder liner that is less likely to be damaged due to a groove for forming an insulation air layer, and an internal combustion engine that uses said heat-shielding ring. The present invention is a heat-shielding ring 10 for a cylinder liner and an internal combustion engine 200 that uses the heat-shielding ring 10. In the heat-shielding ring 10 for a cylinder liner, the cross-sectional shape of a groove 34 provided in an outer peripheral surface 30 of a ring-form member 20 constituting the heat-shielding ring 10 is any one or more shapes selected from the group comprising (1) a first cross-sectional shape in the form of a letter V, (2) a second cross-sectional shape in which the vicinities of the corners of the first cross-sectional shape are rounded into a curve, (3) a third cross-sectional shape formed from only an arcuate curve, and (4) a fourth cross-sectional shape in the form of a letter U.
A cylinder liner of the present invention is a cylinder liner mounted on a cylinder block and formed of flaky graphite cast iron, at least a nitrided layer is provided on an inner periphery of the cylinder liner, and a cross hatching section is formed on the inner periphery, a roughness curve of the inner periphery has a plateau honing shape, a ten-point average roughness Rz of the inner periphery pursuant to JIS B0601:1982 is 4.0 μm or less, and an average value of an area ratio of pits generated in the inner periphery is 8% or less.
B24B 33/02 - Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
The present invention addresses the problem of providing a spiny liner that can further improve joining strength when integrated with metal on an outer circumferential surface side. The spiny liner having a plurality of protrusions on the surface, including narrowed mid-section protrusions, and capable of solving the problem, wherein the total value of the following (I) and (II) for the protrusions is 1.55 or more, where Pc is the number of the narrowed mid-section protrusions per 100 mm2, h (mm) is the average height of the protrusions, and dw (mm) is the average maximum thickness and dn (mm) is the average minimum thickness of any 20 protrusions from among the narrowed mid-section protrusions. (I) = Pc × [(0.35hπ/12) × (2dw2- dw × dn - dn2)]; (II) = Pc × {(dn2/4) × π × 0.35h}
The present invention addresses the problem of providing a cylinder liner that can improve fuel efficiency by reducing the friction of a sliding surface compared to conventional levels without increasing oil consumption compared to conventional levels. In this cylinder liner or cylinder bore used for internal combustion engines, the inner circumferential surface of the cylinder liner or the cylinder bore has a first sliding region, a second sliding region, and a third sliding region which respectively have surface roughnesses Rvk of 0.05-3 μm, 0.4-1.5 μm, and 0.15-0.7 μm, and it is thus possible to reduce friction while keeping oil consumption the same.
An object of the present invention is to provide a cylinder liner for insert casting that can improve the joining strength between a cylinder liner and a cylinder block by reducing voids generated between the cylinder liner and the cylinder block.
av between top portions of protrusions (mm) (1).
The present invention addresses the problem of providing a cylinder liner or a cylinder bore that makes it possible to reduce friction on a sliding surface and reduce oil consumption. In a piston sliding direction of a cylinder bore, the groove part of a second sliding area positioned on a crank side has a higher groove area ratio at a depth of 0.3 μm than a groove part of a first sliding area positioned on a combustion room side and falls within a specific range to thereby make it possible to reduce friction and reduce oil consumption.
2 on the outer peripheral surface, and (ii) when two 15.2 mm×0.03 mm lines are set in parallel with a gap of 3.8 mm therebetween at an arbitrary position on the outer peripheral surface of the cylinder liner, the total number of projections that are in contact with the two lines is 8 or less.
A cylinder liner according to the present invention is characterized by being made of a flaky graphite cast iron, attached to a cylinder block, having at least a nitrided layer on the inner peripheral surface of the cylinder liner , and having a cross hatch section formed therein, wherein the roughness curve of the inner peripheral surface has a flat honing shape, the ten point average roughness Rz of the inner peripheral surface according to JIS B0601:1982 is no greater than 4.0 μm, and the area fraction of bits formed on the inner peripheral surface has an average value of no greater than 8%.
F02F 1/08 - Shape or arrangement of cooling fins; Finned cylinders running-liner and cooling-part of cylinder being different parts or of different material
A cylinder liner that is casted in a block and defines a cylinder bore for one cylinder includes: a cylindrical liner body; a projection part including a plurality of projections on an outer peripheral surface of a part of the liner body; and a bore adjacent part inclined at a predetermined angle to an axial direction of the body and extending in the inclination direction, at a predetermined part between an upper side end and a lower side end of the body, of the outer peripheral surface of the body, which faces another cylinder bore to be adjacent when casted in the block. The outer peripheral surface of the bore adjacent part is positioned more on an inner side of the body than the outer peripheral surface above and below, and is formed such that the projections are absent on at least a part of the outer peripheral surface.
A cylinder liner that is casted in a block and defines a cylinder bore corresponding to one cylinder includes: a cylindrical liner body; a projection part provided so as to include a plurality of projections on an outer peripheral surface of a part of the liner body; and a bore adjacent part formed such that the outer peripheral surface at an upper side end of the liner body is positioned more on an inner side of the liner body than the outer peripheral surface below the upper side end, and the projections are absent on at least a part of the outer peripheral surface at the upper side end, in a predetermined range of the outer peripheral surface of the liner body, which faces another cylinder bore to be adjacent when casted in the block.
The present invention addresses the problem of reducing friction and imparting excellent seizure resistance. Provided is an internal combustion engine comprising: a cast iron cylinder liner having an inner circumferential sliding surface made of cast iron; and a cylinder bore having an inner circumferential sliding surface made of cast iron, wherein the inner circumferential sliding surface includes a region satisfying expressions (1)-(3) below. (1): Rvk/Rk≥1.0, (2): 0.08 μm≤Rk≤0.3 μm, (3) Rk-Rpk>0 (In expressions (1)-(3), Rk is the roughness depth in a core section according to JIS B0671-2:2002, Rpk is the protruding peak height according to JIS B0671-2:2002, and Rvk is the protruding valley depth according to JIS B0671-2:2002.)
The present invention addresses the problem of providing a cylinder liner having a coating film in which cracking does not occur even when the cylinder liner is exposed to a harsh heat cycle having a large temperature difference. The problem addressed by the present invention is solved by a manufacturing method including a spraying step for spraying a spraying material including chromium carbide onto the surface of the cylinder liner.
B22D 13/02 - Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
B22D 13/10 - Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor; Means for feeding molten metal, cleansing moulds or removing castings
B22D 19/00 - Casting in, on, or around, objects which form part of the product
32.
CYLINDER LINER FOR CAST-COVERING, AND METHOD FOR MANUFACTURING CYLINDER BLOCK
This invention addresses the problem of providing a cylinder liner for a cast-covering, with which bonding strength between a cylinder liner and a cylinder block can be improved by minimizing a gap formed in the cylinder block. This problem is solved by a cylinder liner for a cast-covering having a plurality of protuberances in the outer peripheral surface, wherein the following stipulations (i) and (ii) are satisfied. (i) The number of protuberances is five to fifty (inclusive) per 1 cm2 on the outer peripheral surface. (ii) When two lines measuring 15.2 mm × 0.03 mm are set in parallel 3.8 mm apart at any positions on the outer peripheral surface of the cylinder liner, the total number of protuberances in contact with the two lines is eight or fewer.
B22D 13/02 - Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
B22D 13/10 - Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor; Means for feeding molten metal, cleansing moulds or removing castings
B22D 19/00 - Casting in, on, or around, objects which form part of the product
33.
Method of manufacturing internal combustion engine, internal combustion engine, and connected cylinder
Provided are a method of manufacturing an engine, an engine, and a connected cylinder. The method of manufacturing an engine includes at least a fitting step of fitting a connected cylinder to a hollow portion of a cylinder block main body. The connected cylinder is (1) a first connected cylinder including two or more cylinder liners and a connecting portion configured to connect the two or more cylinder liners to each other or (2) a second connected cylinder including a connected cylinder main body portion having two or more cylinder bores and a coating configured to cover an inner peripheral surface of the connected cylinder main body portion in which the cylinder bores are formed. The cylinder block main body has one end side, another end side, and the hollow portion passing through the cylinder block main body from the one end side to the another end side.
F02F 1/10 - Cylinders; Cylinder heads having cooling means for liquid cooling
B22D 19/00 - Casting in, on, or around, objects which form part of the product
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
F01P 3/02 - Arrangements for cooling cylinders or cylinder heads
The present invention enhances the ease of maintenance and the recycle-ability of an internal combustion engine and increases the degree of freedom of designing internal combustion engines. Provided is an internal combustion engine manufacturing method for manufacturing an internal combustion engine 100, the method comprising at least a fitting step for fitting, to a hollow portion 64 of a cylinder block body 60 that has a crank chamber 62 formed on one end side thereof, that has a cylinder head attached thereto on the other end side, and that has the hollow portion 64 provided therein so as to penetrate the cylinder block body 60 from the one end side to the other end side, a coupling cylinder 10 being selected from the group consisting of: (1) a first coupling cylinder including two or more cylinder liners and a coupling part for coupling the two or more cylinder liners to each other; and (2) a second coupling cylinder including a coupling cylinder body part provided with two or more cylinder bores and including a coating that covers the inner circumferential surface of the coupling cylinder body part in which the cylinder bores are provided. Also provided are an internal combustion engine manufactured by said method, and a coupling cylinder used therefor.
The purpose of the present invention is to achieve sufficient bonding strength and adhesion to an outer circumferential-side member even with a lower projection height. Provided is a composite structure comprising a cast iron cylindrical member, the outer circumferential surface of which consists of a cast surface and has a plurality of protrusions P integrally formed with the cast surface, wherein A) the heights H of the protrusions P are at least 0.20 mm and less than 0.50 mm, B) the number N of protrusions per 1 cm2of the circumferential surface is 61-180, C) the protrusions P include constricted protrusions Pn, D) the percentage of the constricted protrusions Pn among the protrusions P is at least 50%, E) the bonding strength index S represented by equation 1 below is at least 310, and F) the bonding strength F(Al) when the outer circumferential surface of the cast iron cylindrical member is insert-cast with an aluminum alloy exceeds the boundary bond strength represented by equation 2 below. (1) S=H2×N×NP, (2) Fb=1.325×H2×N-0.75.
F16D 51/16 - Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
36.
Cylindrical member made of flake graphite cast iron
Provided is a cylindrical member made of flake graphite cast iron that has practical processability as well as excellent mechanical strength and further is excellent in abrasion resistance and seizing resistance. Specifically, provided is a cylindrical member made of flake graphite cast iron, the flake graphite cast iron including a composition containing, in terms of mass %, 2.85% or more and 3.35% or less of C, 1.95% or more and 2.55% or less of Si, 0.45% or more and 0.8% or less of Mn, 0.03% or more and 0.25% or less of P, 0.15% or less of S, 0.15% or more and 0.55% or less of Cr, 0.15% or more and 0.65% or less of Mo, 0.15% or more and 0.65% or less of Ni, and the balance of Fe and inevitable impurities.
A cylindrical member made from lamellar graphite cast iron, which has excellent mechanical strength and processability suitable for practical use and also having excellent abrasion resistance and seizure resistance. A cylindrical member made from lamellar graphite cast iron, wherein the lamellar graphite cast iron has a chemical composition containing, in % by mass, 2.85 to 3.35% inclusive of C, 1.95 to 2.55% inclusive of Si, 0.45 to 0.8% inclusive of Mn, 0.03 to 0.25% inclusive of P, 0.15% or less of S, 0.15 to 0.55% inclusive of Cr, 0.15 to 0.65% inclusive of Mo, and 0.15 to 0.65% inclusive of Ni, with the remainder made up by Fe and unavoidable impurities.
The present invention is to enhance the ease of maintenance and recycling of an internal combustion engine and increase the degree of freedom of designing an internal combustion engine. Provided is an internal combustion engine manufacturing method for manufacturing an internal combustion engine 100, the method comprising at least a fitting step for fitting a coupling cylinder 10 to a hollow portion 64 of a cylinder block body 60, said coupling cylinder 10 being selected from the group consisting of: (1) a first coupling cylinder including two or more cylinder liners and a coupling unit for coupling the two or more cylinder liners to each other; and (2) a second coupling cylinder including a coupling cylinder body portion provided with two or more cylinder bores and a coating covering an inner circumferential surface of the coupling cylinder body portion in which the cylinder bores are provided, said cylinder block body 60 having a crank chamber 62 formed on one end side thereof and a cylinder head assembled on the other end side thereof and having the hollow portion 64 provided therein which passes through the cylinder block body 60 from the one end side to the other end side. Also provided are an internal combustion engine manufactured by the manufacturing method, and a coupling cylinder used therefor.
[Problem] To provide: a novel method for producing a porous carbon material which makes it possible to easily produce a porous carbon material having a desired shape; and a spherical porous carbon material. [Solution] A method for obtaining a porous carbon material 13 having fine pores by: immersing a carbon-containing material 11 having a desired shape and comprising a carbon-containing compound, alloy or non-equilibrium alloy in a metal bath 12 having a solidification point that is lower than the melting point of the carbon-containing material 11, and controlled to a lower temperature than the minimum liquidus temperature in the compositional variation range extending until carbon is obtained from the carbon-containing material 11 by decreasing the principal components thereof other than carbon; and as a result, selectively eluting the principal components other than carbon into the metal bath 12 while maintaining the external shape of the carbon-containing material 11.
[Problem] To provide: a novel method for producing a carbon composite material which makes it possible to reduce costs; and a carbon composite material. [Solution] By using a component removal step, the present invention obtains a carbon member having fine pores by: immersing a carbon-containing material 11 comprising a carbon-containing compound, alloy or non-equilibrium alloy in a metal bath 12 having a solidification point that is lower than the melting point of the carbon-containing material 11, and controlled to a lower temperature than the minimum liquidus temperature in the compositional variation range extending until carbon is obtained from the carbon-containing material 11 by decreasing the principal components thereof other than carbon; and as a result, selectively eluting the principal components other than carbon into the metal bath 12. Furthermore, by cooling while a component from the metal bath 12 is present in the fine pores of the carbon member, and solidifying the metal bath 12 component, it is possible to obtain a carbon composite member that combines carbon and the solidified metal bath 12 component.
[Problem] To provide a method for producing a porous member that makes it possible to produce a member having smaller micro-gaps, to make only an outermost surface porous, and to form a porous layer on a surface while maintaining the characteristics of an unformed part of the porous layer. [Solution] A solid metal body 11 comprising a first component is brought into contact with a solid metal material 12 comprising a compound, an alloy, or a non-equilibrium alloy that simultaneously contains a second component and a third component having, respectively, a positive and a negative mixture heat with respect to the first component, then heat treatment is performed at a predetermined temperature for a predetermined length of time. Once the heat treatment causes the first component to be diffused on the metal material 12 side and the third component to be diffused on the metal body 11 side, parts other than a part mainly comprising the second component are selectively removed from the parts in which the first component and/or the second component are diffused and a member having micro-gaps is obtained.
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
C22F 1/06 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
C22F 1/10 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
C23C 10/28 - Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
C23F 1/00 - Etching metallic material by chemical means
C23F 1/22 - Acidic compositions for etching magnesium or alloys thereof
C23F 1/44 - Compositions for etching metallic material from a metallic material substrate of different composition
C22F 1/08 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
C22F 1/16 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
42.
METHOD FOR PRODUCING NANO-COMPOSITE METAL MEMBER AND METHOD FOR JOINING PHASE-SEPARATED METAL SOLIDS
[Problem] To provide: a method for producing a nano-composite metal member that makes it possible to easily produce a nano-composite metal member and that can reduce the costs of production; and a method for joining phase-separated metal solids using the same principle. [Solution] A solid metal body 11 comprising a first component is brought into contact with a solid metal material 12 comprising a compound, an alloy, or a non-equilibrium alloy that simultaneously contains a second component and a third component having, respectively, a positive and a negative mixture heat with respect to the first component, heat treatment is performed at a predetermined temperature for a predetermined length of time, the first component and the third component are interdiffused, and a nano-composite metal member is thereby obtained.
[Problem] To provide: a method for producing porous graphite which can realize higher durability, higher output and a higher capacity; and porous graphite. [Solution] In a component removal step, a carbon member 13 having very small voids formed therein is produced by immersing a carbon-containing material 11 made from a carbon-containing compound, alloy or non-equilibrium alloy in a metal bath 12 to allow other non-carbon main components to be selectively eluted in the metal bath 12, wherein the metal bath 12 has a lower freezing point than the melting point of the carbon-containing material 11 and is controlled at a temperature lower than the lowest value of a liquidus temperature in a composition-varying range during which the contents of the above-mentioned other non-carbon main components are gradually reduced in the carbon-containing material 11 and finally carbon is produced. In a graphitization step, the carbon member 13 produced in the component removal step is heated to graphitize the carbon member 13. In an activation step, the carbon member which has been graphitized in the graphitization step is subjected to an activation treatment.
The purpose of the present invention is to provide a rotary body shaft, a rotary body structure and a vehicle wheel in which sufficient torsional strength is ensured while keeping costs down. In the casting starting material state, the outer peripheral surface of this rotary body shaft (3) has multiple protrusions; this rotary body shaft (3) is inserted as an internal chill in the rotation center of the rotary body main body (2), and external torsional moment is transmitted to the rotary body main body (2). Further, the specific gravity of the material of the rotary body main body (2) is less than that of the material of the rotary body shaft (3), and multiple protrusions (5) are formed on the outer peripheral surface of the rotary body shaft (3) in the casting starting material state. The shape of the protrusions (5) has three portions from the outer periphery towards the inner periphery: the leading end portion has a dome shape, the middle portion has a constricted shape, and the base portion has a conical shape. For those of the protrusions (5) having a height of 0.3mm or greater from the outer peripheral surface of the rotary body shaft (3), the ratio of the total of the cross-sectional area enclosed by the equal-height contour line at the 0.3mm height position and the surface area of the outer peripheral surface of the rotary body shaft (3) is 5-50%.
F16D 1/06 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
B22C 9/28 - Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
B22D 13/02 - Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
B22D 19/00 - Casting in, on, or around, objects which form part of the product
A support member with excellent contact with the member to which the support member is attached, that is, a metal support member which supports a shaft directly or through a bearing and which has a plurality of the projections at its outer circumferential surface, wherein the plurality of the projections are formed at the outer circumferential surface as a whole at the time of casting of the support member and wherein at least part of the projections have thin-waisted shapes or a plastic support member which supports a shaft directly or through a bearing and which has a plurality of the projections at its outer circumferential surface, wherein the plurality of the projections are formed at the outer circumferential surface as a whole at the time of molding of the support member and wherein at least part of the projections have thin-waisted shapes.
2 on an outer circumferential surface 4 over which, in turn, a thermally sprayed layer 7 is covered, wherein the thermally sprayed layer 7 is comprised of a ferrous material and wherein a ratio of a surface area of a thermally sprayed layer 7 surface at a certain region on the outer circumferential surface 4 of the liner with an area of the region is 12 to 23. The thermally sprayed layer preferably has a thickness of 0.01 to 0.2 mm. The thermally sprayed layer is preferably formed using a wire shaped thermal spraying material.
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