Surface treatment of cold rolling cylinder - by coating with hardening component prior to exposing to laser beam treatment

摘要

Surface treatment of a cylinder used in cold rolling consists of coating the surface with a metallic substance prior to subjecting it to a laser beam to produce controlled wrinkling effect. - The metal is Ni, Cr, Co or an alloy of at least two. The coating can also contain at least one metal oxide. A further alternative is that the coating contains a hardening component such as a carbide or nitride and/or a component capable of reacting with a component present in the cylinder to form a hardening component. The coating is carried out by usual methods such as electrolysis, electrophoresis, vapoursation or ionic implantation.