The quality of work roll of cold rolling mill directly affects the surface quality, pass rate and rolling operation rate of aluminum sheet. The quality requirements of the work roll are higher and higher, but the basic requirements are as following:
1. High roll hardness (95-100HSD) and uniformity (±1HSD);
2. Deep hardened layer depth(20-55mm, radius direction);
3. High wear resistance;
4. Good anti-stripping performance;
5. Excellent mechanical properties.