cold-rolling

Cold-rolling is an industrial process that shapes metals, primarily steel, by passing them between rollers without heating them. This method is often performed after hot-rolling to achieve specific properties such as improved mechanical strength, better machinability, precise dimensions, a brighter surface finish, or a thinner gauge than hot-rolling alone can provide.1

The process involves feeding unheated metal strips into a cold-reduction mill, typically a tandem mill with multiple stands of rollers. These mills operate at high speeds, requiring precise control over cooling and lubrication. After cold-rolling, the metal is usually too hard and brittle, necessitating annealing to restore ductility. A final, lighter cold-rolling pass on a temper mill further refines its physical properties and surface finish. This complex process is heavily reliant on computer control for efficiency and precision.2