Abstract

Disclosed by the present invention are a roller used for galvanized aluminium sheet and a preparation method therefor. According to the present invention, the content of retained austenite is regulated as 8%-15%, and the rigidity is 93-95HSD. The raw materials are placed in a medium-frequency induction furnace to prepare an alloy liquid, and a semi-finished product is cast under a low temperature; a finished product is obtained after heat treatment, thermal refining, quenching treatment, cold treatment, tempering treatment and final fine grinding, the cold treatment temperature being -30 to 5 degrees centigrade. The austenite phase area is enlarged while elements such as Ni and Mn are added, thus a critical point of retained austenite meeting the manufacturing technique is found. That is, the rigidity regulation not only satisfies the rolling force, but also prevents the situation that the roller cannot be used at a minimum diameter due to low rolling rigidity. Meanwhile, the combination of different alloy components and different technologies not only improves the corrosion resistance of the galvanized aluminium roller but also enables the austenite to be stabilized in different working temperatures, thereby prolonging the service life of the roller while improving the surface quality.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/60 - Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
• B21B 27/00 - RollsLubricating, cooling or heating rolls while in use
• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• C21D 9/38 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for roll bodies

Abstract

A method for producing silicon steel cold-rolling work rolls from ordinary forged steel roll blanks, nickel being added to the material ratio; during the tempering process, performing real-time adjustment of the heat preservation temperature and heat preservation time on the basis of the required roll working thickness, and increasing the roll surface wear resistance, hardness, hardened layer depth, and resistance to spalling during later use by means of cryogenic heat preservation treatment; performing the cryogenic treatment by means of a dedicated cryogenic device, such that the surface treatment of the roll is more uniform. By means of a precipitation tube and a blowing apparatus, re-blowing the nitrogen precipitated at the bottom back into a cryogenic box, thereby reducing the use of liquid nitrogen and also promoting the movement of gas in the cryogenic box.

IPC Classes  ?

• C21D 1/18 - HardeningQuenching with or without subsequent tempering
• C21D 1/25 - Hardening, combined with annealing between 300 °C and 600 °C, i.e. heat refining ("Vergüten")
• C21D 1/26 - Methods of annealing
• C21D 6/04 - Hardening by cooling below 0° C
• C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
• C21D 9/38 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for roll bodies
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium

Abstract

A method for manufacturing a forged steel work roll for rolling a material extremely thin, comprising: optimizing a cold rolling mill containing 5% chromium, and performing tempering by increasing a holding time in a 930°C environment, so that the surface hardness of the tempered roll reaches 52-57 HSD, and performing deep cryogenic insulation treatment to improve the wear resistance, hardness, hardened layer depth, and anti-stripping properties of the surface during later use of the roll. In addition, deep cryogenic treatment is carried out using a specialized deep cryogenic apparatus, so that treatment of the surface of the roll is more uniform. Nitrogen deposited at the bottom is blown back into the deep cryogenic box by means of a precipitation tube and a blowing device, reducing the use of liquid nitrogen and promoting the movement of gas within the deep cryogenic box.

IPC Classes  ?

• C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
• C22C 33/04 - Making ferrous alloys by melting
• C21D 1/18 - HardeningQuenching with or without subsequent tempering
• C21D 6/04 - Hardening by cooling below 0° C

Abstract

An adjustable roller, comprising a roller body (1), a roller sleeve (2), a locking disc (3), keys (4), and an adjusting screw (5), wherein the roller sleeve is sleeved on the roller body, and edges of two ends of a roller base (11) of the roller body are provided with first key slots (12); second key slots (21) are provided at both ends of an inner wall of the roller sleeve; the first key slots and the second key slots are matched and then inserted with the keys; the locking disc and the roller body are fixed by means of screws; a first adjusting screw hole (32) is provided at the outer edge of the locking disc; a second adjusting screw hole (22) is provided on the roller sleeve corresponding to the first adjusting screw hole; and the adjusting screw rotates to pass through the first screw hole and then enters the second screw hole. The roller body can be repeatedly used by sleeving the roller sleeve, so that the production cost is reduced, and the resource is reasonably utilized; and moreover, the relative position between the roller sleeve and the roller body can be adjusted by means of the adjusting screw, so that the adjustable roller is convenient and fast to use and has high stability.

IPC Classes  ?

• B21B 27/03 - Sleeved rolls

Abstract

A replaceable roller, comprising a roller body (1), a roller sleeve (2), a locking ring (3), and keys (4); the roller sleeve (2) is sleeved on the roller body (1); first key slots (12) are formed at edges of two ends of a roller base (11) of the roller body (1); second key slots (21) are formed at both ends of an inner wall of the roller sleeve (2) corresponding to the first key slots (12); the first key slots (12) and the second key slots (21) are matched and then inserted with the keys (4), so that the roller body (1) and the roller sleeve (2) cannot rotate relatively, a groove (111) is formed in end faces of two ends of the roller base (11); the groove (111) is provided with threads; a retainer ring (31) is provided at one surface of the locking ring (3); the retainer ring (31) is provided with threads matched with the groove (111). By replacing the roller sleeve (2), the service life of the roller is prolonged, and thus the production cost is reduced. Moreover, the key slots (12, 21) are cooperatively used with the locking ring (3), ensuring the sleeve stability of the roller sleeve (2), and saw teeth of the inner ring of the locking ring (3) match with a locking block (5) to ensure fixation of the locking ring (3).

IPC Classes  ?

• B21B 27/03 - Sleeved rolls

Abstract

A reusable roller, comprising a roller body (1), a roller sleeve (2), a locking disc (3), and keys (4), wherein the roller sleeve (2) is sleeved on the roller body (1), and edges of two ends of a roller base (11) of the roller body (1) are provided with first key slots (12); second key slots (21) are provided at both ends of an inner wall of the roller sleeve (2) corresponding to the first key slots (12); the first key slots (12) and the second key slots (21) are matched and then inserted with the keys (4); an end hole through which an end portion (13) of the roller body (1) passes is provided in the middle of the locking disc (3); a through hole is provided on the locking disc (3), and a corresponding screw hole is provided on the roller base (11); the locking disc (3) and the roller body (1) are fixed by means of screws. The roller body (1) can be repeatedly used by sleeving the roller sleeve (2), so that the production cost is reduced, and the resource is reasonably utilized; and moreover, the key slots (12, 21) are cooperatively used with the locking ring (3), ensuring the sleeve stability of the roller sleeve (2).

IPC Classes  ?

• B21B 27/03 - Sleeved rolls