Patent ID: 6695930
Filing Date: 2004-02-24
Classification: C21D,C22C,F16H

Abstract:
A process for forming materials comprising the steps of: providing a tool from the group consisting of dies and punches including a core and a work surface made from a steel alloy comprised of about 0.008 to 0.24% by weight carbon, about 15 to 28% by weight cobalt, about 1.5 to 9.5% by weight nickel, and one or more additives taken from the group consisting of chromium, molybdenum and vanadium, and the balance iron;case hardening the work surface of the tool to a depth of at least 0.1 millimeters at a hardness of at least 65 Rockwell C; and working the material with the tool by engaging the material with the work surface.