Alloy steel roller and manufacturing process thereof

Abstract

The invention discloses an alloy steel roller and a manufacturing method thereof. Alloy steel in the alloy steel roller contains metal elements such as silicon, manganese, chromium, molybdenum, nickel, vanadium, niobium and the like, wherein the content of carbon is between 0.60 percent and 0.68 percent; and the content of sulfur and the content of phosphorous are smaller than or equal to 0.025 percent. The manufacturing method comprises a smelting process, a forging process and a thermal treatment process, wherein the thermal treatment process comprises a thermal treatment process after forging, a preparation thermal treatment process, a quenching thermal treatment process and a final annealing process. In the quenching thermal treatment process, a medium-frequency electromagnetic induction heating device and a water spraying device are adopted. By improvement on a material, i.e., improvement on the thermal treatment process, the continuous rolling time of the roller can be prolongedby more than 2 hours, surface hardness, the depth of a quenched case, surface wearing resistance and the resistance to events such as fracture and the like are remarkably enhanced, the comprehensive performance is remarkably improved, the loss of the roller is reduced, the roller changing frequency is remarkably lowered, and the production efficiency of a cold-roll steel sheet is further increased.

Description

technical field [0001] The invention relates to a metal cold-rolled and / or hot-rolled roll, in particular to an alloy steel roll. Background technique [0002] Prior art In the metal cold rolling production process, the roll is the main deformation tool of the rolling mill. Due to the problem of the material of the roll itself and the harsh working environment in which it is located, the roll often fails or even is scrapped. Such as: excessive wear of rolls, surface roughness (orange peel), grid pits, strangulation marks, cracking and peeling, etc. But to sum up, there are only three issues: one is the level of wear resistance (including roughness resistance), the second is the depth of the effective hardened layer, and the third is the size of crack resistance (including anti-stripping). Therefore, in order to improve the service life of the cold roll, first the roll must have a suitable material with high wear resistance, the hardness of the surface of the second roll mus...

AI Technical Summary

Problems solved by technology

But to sum up, there are only three issues: one is the level of wear resistance (including roughness resistance), the second is the depth of the effective hardened layer, and the third is the size of crack resistance (including anti-stripping)

However, it is difficult to meet the above requirements with the rolls manufactured by the prior art

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