Roll mark prevention composite roller

Abstract

The invention relates to a roll mark prevention composite roller which comprises a working layer and a nodular cast iron core part and is characterized in that the working layer comprises the following components in percentage by weight: 0.85-1.10% of C, 0.6-1.0% of Si, 0.20-0.8% of Mn, 5.5-7.5% of Cr, 0.30-0.8% of Mo, 0.1-0.3% of V, less than or equal to 0.4% of Ni, less than or equal to 0.020% of P, less than or equal to 0.015% of S and the balance of Fe and unavoidable impurities. The roll mark prevention composite roller provided by the invention has the beneficial effects that (1) the content of C and Si is increased in the roller so that the matrix hardness of a cold rolling work roller can reach 65-66HRC and the surface hardness can reach 98-100HSD to obtain relatively good roll mark resistance; (2) a high-hardness carbide is obtained by adjusting the Cr / C value so as to enhance the wear resistance of the roller.

Description

technical field [0001] The invention relates to an anti-roll printing composite roll. Background technique [0002] The cold-rolled work rolls used in the current domestic market are mainly Cr2, Cr3 and Cr5 series, but with the rapid development of industries such as automobiles, home appliances, and food, the quality requirements for cold-rolled sheets continue to increase, so the cold-rolled work rolls The quality requirements are getting higher and higher. [0003] However, the above-mentioned series of cold-rolled work rolls often have many roll marks due to the insufficient compressive strength of the surface of the milk roll. The transfer of roll mark defects to the plate will affect the surface quality and product qualification rate, and increase the number of roll changes. At the same time, because the wear resistance cannot meet the needs of new products, the roll changing cycle is reduced, the labor intensity of workers is increased, and the production efficiency ...

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned series of cold-rolled work rolls often have many roll marks due to insufficient compressive strength on the surface of the milk roll. The transfer of roll mark defects to the plate will affect the surface quality and product qualification rate, and increase the number of roll changes.

At the same time, because the wear resistance cannot meet the needs of new products, the cycle of changing rolls is reduced, the labor intensity of workers is increased, and the production efficiency is low.