Cold rolling working roll with anti-rollar mark and high-wearing resistance and manufacturing method thereof

Abstract

The invention discloses a cold rolling working roll with roller impression resistance and high wearing resistance and a manufacturing method thereof. The materials of the cold rolling working roll comprises the following chemical compositions in terms of weight percentage: 0.85 percent to 1.10 percent of C, 0.6 percent to 1.0 percent of Si, 0.20t percent to 0.8 percent of Mn, 5.5 percent to 7.5percent of Cr, 0.30 percent to 0.8 percent of Mo, 0.1 percent to 0.3 percent of V, no more than 0.4 percent of Ni, no more than 0.020 percent of P, no more than 0.015 percent of S and the balance of Fe and inevitable impurities. The manufacturing method comprises the following steps: 1. the cold rolling roll billet is manufactured by adopting the conventional production technique according to the chemical compositions and the content thereof; 2. rough turning and tempering are carried out on the roll billet; 3. quenching heat treatment is carried out at the temperature of 950 DEG C to 1010 DEG C; 4. cold treatment is carried out at the temperature of minus 80 DEG C to minus 50 DEG C for 2 hours to 3 hours; and 5. tempering is carried out at the temperature of 120 DEG C to 145 DEG C for 60 hours to 150 hours. The cold rolling working roll has rolling marks resistance and high wearing resistance.

Description

technical field [0001] The invention relates to a cold-rolled work roll and a manufacturing method thereof, in particular to a cold-rolled work roll with roll mark resistance and high wear resistance and a manufacturing method thereof. 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 roll surface. 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 ...

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned series of cold-rolled work rolls often have many roll marks because the roll surface is not strong enough to resist compression. 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.