Cold roll with high abrasive resistance and high roughness retaining capability and manufacturing method thereof

Abstract

The invention discloses a cold roll with high abrasive resistance and high roughness retaining capability, which comprises the following chemical components in parts by weight: 0.90-1.10 parts of C, 0.2-1.00 part of Si, 0.40-0.70 part of Mn, 4.80-6.80 parts of Cr, 1.00-2.00 parts of Mo, 0.10-0.50 part of V, not more than 0.40 part of Ni, not more than 0.02 part of S, not more than 0.02 part of P and the balance of Fe. The surface hardness of the cold roll is 92HSD-100HSD; the quenching heating temperature for heat treatment is 960-1020 DEG C; the cold treatment temperature is minus 90 to minus 50 DEG C; the treatment time is 2-8h; the temper holding temperature is 120-145 DEG C; and the holding time is 60-150h. The cold-rolling working roll prepared by the materials and the performances of the invention has high roughness retaining capability and high abrasive resistance; and under the same service conditions, the service life of the cold roll of the invention is improved by 50% compared with the cold roll made of the previous common chromium steel material.

Description

Technical field [0001] The invention relates to a cold-rolling work roll of a new material, and a process method for manufacturing the cold-rolling roll by using the material. Background technique [0002] In the current domestic and foreign markets, the materials used to manufacture cold-rolled work rolls are mainly Cr2, Cr3, and Cr5 series. However, with the rapid development of automobiles, home appliances, electronics and other industries, the quality requirements for cold-rolled sheets and silicon steel sheets are constantly increasing. With the improvement, the quality requirements for cold-rolled work rolls are also getting higher and higher. When the above-mentioned chromium steel series cold-rolling work rolls are rolling thin plates or silicon steel sheets, slipping between the rolls and the material being rolled often occurs during the rolling process. Soon after the rolls are used, many rolls will appear on the surface. Defects, these defects will be transferred to t...

AI Technical Summary

Problems solved by technology

A set of plate rolling production line needs a lot of rolls. Replacing new rolls not only requires a lot of money, but also requires shutdown and a lot of manpower, which increases the labor intensity of workers and reduces production efficiency.

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