Patent ID: 6419770
Filing Date: 2002-07-16
Classification: C21D

Abstract:
A method of manufacturing a product of high carbon-high alloy steel, comprising the steps of:executing cold-warm working at a temperature of less than 800Â° C. to make more than 10% plastic deformation with respect to a hot rolling component made of the high carbon-high alloy steel, which has a plurality of crystallized first stage carbide, so that the crystallized first stage carbide is broken into more fine grain size pieces among which cracks and voids are formed, thereby forming an interim component whose mechanical characteristics including impact strength and seizure resistance are inferior to those, of the hot rolling component; and, then, executing a Hot Isostatic Pressing treatment on the interim component so that the cracks and voids formed by the cold-warm working among the more fine grain size pieces of the first stage carbide are filled with a substrate of the interim component, thereby forming the product the mechanical characteristics of which are superior to those of the hot rolling component.