Abstract

The present description relates to an induction coil (20) for an induction furnace comprising a first tube (30), in which a cooling fluid is intended to flow, and a second tube (40), the first tube being accommodated in the second tube, an internal volume (50), containing a material selected from a liquid, a gas, or a porous solid, or being placed under vacuum, being present between at least a portion of the first tube (30) and the second tube (40).

IPC Classes  ?

• H05B 6/24 - Crucible furnaces
• C21C 5/52 - Manufacture of steel in electric furnaces
• F27B 14/06 - Crucible or pot furnacesTank furnaces heated electrically, e.g. induction crucible furnaces, with or without any other source of heat
• H05B 6/42 - Cooling of coils

Goods & Services

Electric and electronic apparatus and instruments for controlling or monitoring ovens for industrial or scientific, experimental use and for testing; ovens for scientific, experimental use and for testing, particularly low-pressure thermochemical treatment ovens, vacuum and pressure ovens, induction ovens, crystal growth ovens, deposition ovens, diffusion ovens. Ovens for industrial use, particularly low-pressure thermochemical treatment ovens, vacuum and pressure ovens, induction ovens, crystal growth ovens, deposition ovens, diffusion ovens for use in the manufacture or processing of parts in the automotive, aeronautics, electronics, steel, microelectronics, nuclear, photovoltaic, medical and defense industries; component parts of these ovens, namely, kiln furniture [supports], coatings, fittings. Thermochemical materials treatment services and materials assembly services, particularly printed circuits, to order for the benefit of third parties, except machining and manufacturing services for metal parts.

Abstract

The present invention relates to a connecting device (20) for a magnetic gripper, comprising a membrane (22) having first and second opposite faces (24, 26), an annular portion (28) projecting from the second face along the periphery of the membrane and deformable fixing means (40) projecting from the annular portion.

IPC Classes  ?

• B25J 15/06 - Gripping heads with vacuum or magnetic holding means
• B25J 19/00 - Accessories fitted to manipulators, e.g. for monitoring, for viewingSafety devices combined with or specially adapted for use in connection with manipulators

Abstract

The present description concerns a gas cooling cell, comprising: a chamber; at least one opening in the chamber, of access to a treatment space internal to the chamber; at least one door for closing the opening; and a system (4), internal to the chamber, comprising at least one wall (42) mobile between a first position where this wall forms a screen between the opening and the treatment space, and a second position where said wall clears the access to the treatment space from the opening.

IPC Classes  ?

• C21D 1/767 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulationReheating thereof
• C21D 1/613 - GasesLiquefied or solidified normally gaseous material
• C21D 1/62 - Quenching devices
• C03B 27/04 - Tempering glass products using gas
• F25D 3/10 - Devices using other cold materialsDevices using cold-storage bodies using liquefied gases, e.g. liquid air

Abstract

The present description relates to a cell for cooling under gas, comprising: an enclosure; at least one opening in the enclosure, for access to a processing space inside the enclosure; at least one door closing the opening; and a system (4), inside the enclosure, comprising at least one wall (42) that is able to move between a first position in which this wall forms a screen between the opening and the processing space, and a second position in which said wall allows access to the processing space from the opening.

IPC Classes  ?

• F25D 3/10 - Devices using other cold materialsDevices using cold-storage bodies using liquefied gases, e.g. liquid air
• F25D 17/06 - Arrangements for circulating cooling fluidsArrangements for circulating gas, e.g. air, within refrigerated spaces for circulating gas, e.g. by natural convection by forced circulation
• F25D 23/02 - DoorsCovers
• C21D 1/613 - GasesLiquefied or solidified normally gaseous material
• C21D 1/767 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulationReheating thereof
• C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor

Goods & Services

Industrial robots, especially robots equipped with articulated arms for handling work pieces, Delta robots, robots (parallel robots), SCARA (Selective Compliance Articulated Robot Arm) robots, Cartesian robots, collaborative robots; motors for machines, especially, conveyors (machines); electric motors for machines, especially, brushless absolute encoder motors, asynchronous motors, stepping motors and linear motors; pneumatic controls for machines; hydraulic controls for motors and engines; pneumatic valve actuators. Computers; vision systems, namely, assembly of apparatus and instruments for the control of workpiece production, except those in the field of transport and transport security; programmable controllers, except those in the field of transport and transport security; three-dimensional viewers, except those in the field of transport and transport security; video cameras, except those in the field of transport and transport security; video surveillance cameras, except those in the field of transport and transport security; thermal imaging cameras; network monitoring cameras, except those in the field of transport and transport security; computer programs for vision systems, robotic industrial systems and automated systems, except those in the field of transport and transport security; supervision terminals, namely, computer apparatus for controlling and monitoring automated manufacturing processes; apparatus for controlling lighting, except those in the field of transport and transport security; software for controlling lighting, except those in the field of transport and transport security. Installation, maintenance and repair of robotic industrial systems, vision systems and automated systems, none of these services relating to the field of transport or transport security. Custom manufacture of industrial robots to order for others. Engineering, except engineering in the field of transport and transport security; computer software design, except in the field of the transport and transport security; installation of computer software, except in the field of the transport and transport security; maintenance of computer software, except in the field of the transport and transport security; updating of computer software, except in the field of the transport and transport security; rental of computer software, except in the field of the transport and transport security.

Goods & Services

Industrial robots, especially robots equipped with articulated arms for handling workpieces, Delta robots, parallel robots, Selective Compliance Articulated Robot Arm robots, Cartesian robots, collaborative robots; motors for machines, especially, conveyors; electric motors for machines, especially, brushless absolute encoder motors, asynchronous motors, stepping motors and linear motors; pneumatic controls for machines; hydraulic controls for motors and engines; pneumatic valve actuators Computers; vision systems, namely, assembly of apparatus and instruments for the control of workpiece production, namely, cameras, light sensors, image sensors, lighting systems, scanners, camera lenses, except those in the field of transport and transport security; programmable electronic controllers for the control of workpiece production, except those in the field of transport and transport security; three-dimensional image viewers, except those in the field of transport and transport security; video cameras, except those in the field of transport and transport security; video surveillance cameras, except those in the field of transport and transport security; thermal imaging cameras; network monitoring cameras, except those in the field of transport and transport security; downloadable or recorded computer programs for vision systems, robotic industrial systems and automated systems, except those in the field of transport and transport security; supervision terminals, namely, computer hardware and peripheral devices and recorded computer software sold as a unit for monitoring and controlling automated manufacturing processes; apparatus for controlling lighting, except those in the field of transport and transport security; downloadable or recorded software for controlling lighting, except those in the field of transport and transport security Installation, maintenance and repair of robotic industrial systems, vision systems and automated systems, none of these services relating to the field of transport or transport security Custom manufacture of industrial robots to order for others Engineering, except engineering in the field of transport and transport security; computer software design, except in the field of the transport and transport security; installation of computer software, except in the field of the transport and transport security; maintenance of computer software, except in the field of the transport and transport security; updating of computer software, except in the field of the transport and transport security; rental of computer software, except in the field of the transport and transport security

Goods & Services

Industrial robots, especially, Robots with articulated arms for manipulating workpieces, Delta robots (parallel robots), SCARA (selective compliance articulated robot arm) robots, cartesian coordinate robots, Collaborative Robot; Driving devices for machines, especially, Conveyers; Electric driving motors for machines, especially, Brushless motors comprising absolute encoders, Asynchronous motors, Stepper motors and linear motors; Pneumatic controls for machines; Pneumatic controls for motors; Pneumatic valve actuators. Computers; Vision systems, Namely, Assemblies of apparatus and instruments for controlling the production of workpieces, other than in the field of transport and transport security; Programmable controllers, other than in the field of transport and transport security; Three-dimensional viewers, other than in the field of transport and transport security; Camcorders, other than in the field of transport and transport security; Video surveillance cameras, other than in the field of transport and transport security; Thermal imaging cameras; Network surveillance cameras, other than in the field of transport and transport security; Computer programs for viewing systems, robotic industrial systems and automated systems, other than in the field of transport and transport security; Supervision terminals, Namely, Computer apparatus for controlling and monitoring automated manufacturing processes; Lighting control apparatus, other than in the field of transport and transport security; Lighting control software, other than in the field of transport and transport security. Installation, maintenance and repair of robotic industrial systems, viewing systems and automated systems, none of the aforesaid services relating to the field of transport or transport security. Customised manufacture of industrial robots to order, for others. Engineering, other than engineering in the field of transport and transport security; Computer software design, other than in the field of transport or transport security; Installation of computer software, other than in the field of transport or transport security; Maintenance of computer software, other than in the field of transport or transport security; Updating of computer software, other than in the field of transport or transport security; Rental of computer software, other than in the field of transport or transport security.

Abstract

A method for carbonitriding of a steel part arranged in a chamber comprises first steps and second steps, a carburizing gas being injected into the chamber during the first steps only and a nitriding gas being injected into the chamber during the second steps only, at least one of the second steps being situated between two first steps, the pressure in the chamber during at least one part of said two first steps being maintained at a first value and the pressure in the chamber during at least one part of said second step situated between said two first steps being at a second value that is strictly greater than the first value.

IPC Classes  ?

• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
• C21D 1/06 - Surface hardening
• C21D 1/76 - Adjusting the composition of the atmosphere

Abstract

A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° C. and 1000° C. and carried out using a reduced temperature gradient relative to the simple heating phase. Additionally, alternate cementing (C1-Cn) and nitridation (N1-Nn) steps are performed at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T).

IPC Classes  ?

• C23C 8/32 - Carbo-nitriding of ferrous surfaces
• C23C 8/02 - Pretreatment of the material to be coated
• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
• C23C 8/80 - After-treatment

Abstract

The invention relates to a cold crucible furnace comprising: a crucible intended for containing an electrically conductive material to be melted, with walls made of an electrically conductive material, and comprising a lateral cylindrical shell rotating about an axis X and a floor provided with at least one plug, the lateral shell and the floor each being divided into electrically insulated sectors, parallel to X; at least one lateral inductor with at least one turn wound around the lateral shell; at least one bottom inductor, with at least one turn wound around X opposite the lower surface of the floor, leaving an area below the plug free; at least one magnetic flux concentrator made up of a ferromagnetic part comprising at least one lateral wall and a bottom wall arranged opposite the lower surface and the outer periphery of the bottom inductor.

IPC Classes  ?

• F27B 14/06 - Crucible or pot furnacesTank furnaces heated electrically, e.g. induction crucible furnaces, with or without any other source of heat
• F27B 14/08 - Details specially adapted for crucible, pot or tank furnaces
• F27B 14/14 - Arrangements of heating devices
• H05B 6/06 - Control, e.g. of temperature, of power
• F27B 14/10 - Crucibles

Abstract

The invention relates to a method for carbonitriding of a steel part arranged in a chamber, comprising first steps and second steps, a carburizing gas being injected into the chamber during the first steps only and a nitriding gas being injected into the chamber during the second steps only, at least one of the second steps being situated between two first steps, the pressure in the chamber during at least one part of said two first steps being maintained at a first value and the pressure in the chamber during at least one part of said second step situated between said two first steps being at a second value that is strictly greater than the first value.

IPC Classes  ?

• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step

Abstract

The invention relates to a method for carbonitriding of a steel part arranged in a chamber, comprising first steps and second steps, a carburizing gas being injected into the chamber during the first steps only and a nitriding gas being injected into the chamber during the second steps only, at least one of the second steps being situated between two first steps, the pressure in the chamber during at least one part of said two first steps being maintained at a first value and the pressure in the chamber during at least one part of said second step situated between said two first steps being at a second value that is strictly greater than the first value.

IPC Classes  ?

• C23C 8/32 - Carbo-nitriding of ferrous surfaces
• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
• C21D 1/76 - Adjusting the composition of the atmosphere
• C21D 1/06 - Surface hardening

Abstract

A quenching cell including an enclosure containing at least one element for stirring a quenching gas at a pressure greater than 0.4 MPa and a synchronous electric motor capable of rotating the stirring element.

IPC Classes  ?

• F27D 7/04 - Circulating atmospheres by mechanical means
• H02K 21/12 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets
• H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
• C21D 1/767 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulationReheating thereof
• C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
• F27B 3/24 - Cooling arrangements

Abstract

A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles, comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° and 1000° C. and carried out using a reduced temperature gradient relative to the simple heating phase. Additionally, alternate cementing (C1-Cn) and nitridation (N1-Nn) steps are performed at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T).

IPC Classes  ?

• C23C 8/32 - Carbo-nitriding of ferrous surfaces
• C23C 8/02 - Pretreatment of the material to be coated
• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
• C23C 8/80 - After-treatment
• C21D 1/18 - HardeningQuenching with or without subsequent tempering
• C22C 38/00 - Ferrous alloys, e.g. steel alloys

Abstract

A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° and 1000° C. carried out using a reduced temperature gradient relative to the simple heating phase. The method further includes alternate cementing (C1-Cn) and nitridation (N1-Nn) steps at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T).

IPC Classes  ?

• C23C 8/32 - Carbo-nitriding of ferrous surfaces
• C23C 8/02 - Pretreatment of the material to be coated
• C23C 8/22 - Carburising of ferrous surfaces
• C23C 8/26 - Nitriding of ferrous surfaces
• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
• C23C 8/80 - After-treatment

Abstract

A cell for quenching a charge under an atmosphere of gas comprises a centrifugal or helicon-centrifugal impeller comprising a gas intake opening and gas discharge openings. The impeller is rotated by a motor to cause a flow of the gas between the charge and a heat exchanger. The quenching cell comprises first and second mobile half-volutes. In a first position, the first half-volute guides the gas discharged by a first part of the discharge openings and the second half-volute closes off a first portion of the intake opening. In a second position, the second half-volute guides the gas discharged by a second part, different from the first part, of the discharge openings and the first half-volute shuts off a second portion of the intake opening.

IPC Classes  ?

• C21D 1/62 - Quenching devices
• C21D 1/767 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulationReheating thereof
• F27D 7/04 - Circulating atmospheres by mechanical means
• F27D 9/00 - Cooling of furnaces or of charges therein

Abstract

The invention relates to a quenching cell (40) comprising an enclosure (11) containing at least one element (17) for agitating a quenching gas to a pressure higher than 0.4 MPa, and a synchronous electric motor (42) suitable for rotating the agitating element.

IPC Classes  ?

• C21D 1/767 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulationReheating thereof
• C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
• F27B 5/16 - Arrangements of air or gas supply devices
• F27D 7/04 - Circulating atmospheres by mechanical means
• H02K 21/24 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos

Abstract

The invention relates to a quenching cell (40) comprising an enclosure (11) containing at least one element (17) for agitating a quenching gas to a pressure higher than 0.4 MPa, and a synchronous electric motor (42) suitable for rotating the agitating element.

IPC Classes  ?

• C21D 1/767 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulationReheating thereof
• C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
• F27B 5/16 - Arrangements of air or gas supply devices
• H02K 21/24 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
• F27D 7/04 - Circulating atmospheres by mechanical means

Goods & Services

Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, electric installations for the remote control of industrial operations; heat regulating apparatus; furnaces for laboratory experiments; photovoltaic cells, solar modules; data processing equipment, data processing apparatus, computers, software (recorded programs); printed circuits, integrated circuits, semiconductors, microprocessors, silicon wafers. Furnaces for industrial use (other than for experimental purposes), in particular low-pressure thermochemical treatment furnaces, vacuum furnaces and pressure furnaces, crystal growth furnaces for the photovoltaic industry; component parts for these furnaces such as loading apparatus, coverings, fittings, loading supports. Assessments, estimates and research in scientific and technological fields provided by engineers; industrial research services; technical research; technical project study; surveying (engineering work); engineering.

Goods & Services

Automatic control and monitoring software for regulating industrial furnaces used in the manufacture of multi-crystalline silicon ingots and for regulating the parameters, particularly qualitative ones, of the said ingots. Furnaces for industrial use (other than for experimental purposes), particularly low-pressure thermochemical treatment furnaces, vacuum and pressure furnaces, crystal growth furnaces for the automotive, aeronautics, electronics, steel, microelectronics, nuclear, photovoltaic industries; component parts for these furnaces such as loading apparatus, coverings, fittings, loading supports. Thermochemical treatment of materials; custom assembly of materials for others.

Abstract

The invention relates to a method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles, comprising: a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700°C and 750° C to a temperature between 860° C and 1000° C and is carried out using a reduced temperature gradient relative to the simple heating phase; and alternate cementing (C1-Cn) and nitridation (N1- Nn) steps at constant temperature; wherein the final nitridation step is accompanied with a decrease in temperature immediately before a quenching step (T).

IPC Classes  ?

• C23C 8/02 - Pretreatment of the material to be coated
• C23C 8/32 - Carbo-nitriding of ferrous surfaces
• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
• C23C 8/80 - After-treatment

Abstract

The invention relates to a method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles, comprising: a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700°C and 750° C to a temperature between 860° C and 1000° C and is carried out using a reduced temperature gradient relative to the simple heating phase; and alternate cementing (C1-Cn) and nitridation (N1- Nn) steps at constant temperature; wherein the final nitridation step is accompanied with a decrease in temperature immediately before a quenching step (T).

IPC Classes  ?

• C23C 8/02 - Pretreatment of the material to be coated
• C23C 8/32 - Carbo-nitriding of ferrous surfaces
• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
• C23C 8/80 - After-treatment

Abstract

The invention relates to a method for the carbonitriding of steel parts, in particular parts used in the manufacture of automobiles, comprising: a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700°C and 750° C to a temperature between 860° C and 1000° C and is carried out using a reduced temperature gradient compared to the simple heating phase; and alternate cementing (C1-Cn) and nitridation (N1- Nn) steps at constant temperature; wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T).

IPC Classes  ?

• C23C 8/02 - Pretreatment of the material to be coated
• C23C 8/22 - Carburising of ferrous surfaces
• C23C 8/26 - Nitriding of ferrous surfaces
• C23C 8/32 - Carbo-nitriding of ferrous surfaces
• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step
• C23C 8/80 - After-treatment

Abstract

The invention relates to a cell (5) for quenching a charge (14) under an atmosphere of gas. The cell comprises a centrifugal or helico‑centrifugal impeller (22A, 22B) comprising a gas intake opening and gas discharge openings. The impeller is rotated by a motor (24A, 24B) to cause a flow of the gas between the charge and a heat exchanger (32, 34). The quenching cell comprises first and second mobile half‑scrolls (40A, 40B, 42A, 42B). In a first position, the first half‑scroll guides the gas discharged by a first part of the discharge openings (78A) and the second half‑scroll closes off a first portion of the intake opening (76A). In a second position, the second half‑scroll guides the gas discharged by a second part, different from the first part, of the discharge openings and the first half‑scroll shuts off a second portion of the intake opening.

IPC Classes  ?

• C21D 1/62 - Quenching devices
• C21D 1/767 - Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulationReheating thereof
• F27D 7/04 - Circulating atmospheres by mechanical means
• F27D 9/00 - Cooling of furnaces or of charges therein

Abstract

A method for carbonitriding a steel part arranged in an enclosure maintained at a reduced internal pressure, the part being maintained at a temperature level, comprising an alternation of first and second steps, a carburizing gas being injected into the enclosure during the first steps only and a nitriding gas being injected into the enclosure only during at least part of at least two second steps.

IPC Classes  ?

• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step

Abstract

A method for carbonitriding a steel part arranged in an enclosure maintained at a reduced internal pressure, the part being maintained at a temperature level, comprising an alternation of first and second steps, a carburizing gas being injected into the enclosure during the first steps only and a nitriding gas being injected into the enclosure only during at least part of at least two second steps.

IPC Classes  ?

• C23C 8/34 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in more than one step

Goods & Services

Furnaces for industrial use (other than for experimental purposes), especially low-pressure thermochemical treatment furnaces, vacuum and pressurized furnaces, crystal growth furnaces for the automotive, aircraft, electronic, iron and steel, microelectronic, nuclear, photovoltaic industries; structural parts of these furnaces such as loading apparatus, linings, fittings, loading racks. Thermochemical treatment of materials, assembly of materials, especially of printed circuits, custom built for third parties.

Goods & Services

Furnaces for industrial use, other than for experimental purposes, especially low-pressure thermochemical treatment furnaces, vacuum and pressurized furnaces, crystal growth furnaces for the automotive, aircraft, electronic, iron and steel, microelectronic, nuclear, photovoltaic industries; structural parts of these furnaces such as loading apparatus, linings, fittings, loading racks Thermochemical treatment of materials, namely, treatment of metal, assembly of products, especially of printed circuits, custom built for third parties

Goods & Services

Ovens, and electro-heat apparatus for manufacturing electronic circuits and components, machines for depositing and spraying thin films. Heating apparatus, infrared ovens, resistance furnaces, induction furnaces, ultraviolet ovens.