ROLL FOR ALUMINUM OR ALUMINUM ALLOY COLD ROLLING AND COLD ROLLING METHOD

摘要

PROBLEM TO BE SOLVED: To improve an aluminum material surface quality by cold rolling with an aluminum or aluminum alloy roll having a Cr plating of a thickness in a specified μm range and a surface roughness in a specified range on a surface so as to reduce generating quantity of oil pit. ;SOLUTION: A Cr plating having a thickness of 2-20 μm is applied on a surface of a roll for cold rolling of an aluminum or alumium alloy, a surface roughness Ra is made to be 0.01-0.5 μm. Because an aluminum material is cold rolled by using a work roll having an appropriate thickness Cr plating and specifying the surface roughness in an appropriate value, a uniform plating layer and appropriate lubricity is obtained. As a result, aluminum oxide is uniformly formed on the work roll surface and skin roughening of a plate surface due to uneven adhesion of a plating layer or peeling of a plating layer is prevented.;COPYRIGHT: (C)1998,JPO