Patent ID: 8298313
Filing Date: 2012-10-30
Classification: B22F,C22C,Y10T

Abstract:
1. A cold-forming steel article, wherein the article comprises an alloy which comprises, in % by weight: C from about 1.1 to about 1.7 Mn from about 0.1 to about 0.6 Si from about 0.4 to about 1.1 Cr from about 5.6 to about 7.0 Mo from about 1.2 to about 1.8 V from about 3.5 to about 3.9 W from about 1.1 to about 5.0 and optionally niobium as well as less than about 0.4 wt. % of accompanying elements, the remainder being iron and contaminants, and wherein the article has been formed by a process comprising atomization of a melt to form a powder and hot isostatic pressing (HIP) of the powder, and wherein the article has been hardened by a heat treatment and exhibits a material hardness of at least 60 HRC and a material toughness of higher than 50 J.