Patent ID: 10407747

Abstract:
Provided are a cold working tool material with which high hardness can be obtained in a broad range of tempering temperatures, and a cold working tool manufacturing method using same. The present invention is a cold working tool material comprising a steel component composition that contains, in mass %, C: 0.65-2.40%, Cr: 5.0-15.0%, Mo and W alone or combined (Mo+½W): 0.50-4.00%, V: 0.10-1.50%, and N: greater than 0.0300% to 0.0800%, in which martensitic structure can be adjusted by quenching, and in which, in a 90 μm long 90 μm wide region of a cross-sectional structure that does not contain carbides with equivalent circle diameters exceeding 5.0 μm, the number density of carbides A with equivalent circle diameters greater than 0.1 μm to 2.0 μm is at least 9.0×105/mm2 and the number density of carbides B with equivalent circle diameters greater than 0.1 μm to 0.4 μm is at least 7.5×105/mm2. The present invention is also a cold working tool manufacturing method in which quenching and tempering are performed on said cold working tool material.