FREE-MACHINING POWDER METALLURGY STEEL ARTICLES AND METHOD OF MAKING SAME
摘要
A small diameter, elongated steel article, comprising fully consolidated, prealloyed metal powder is disclosed. The consolidated metal powder has a microstructure that has a substantially uniform distribution of fine grains having a grain size of not larger than about 9 when determined in accordance with ASTM Standard Specification E 112. The microstructure of the consolidated metal powder is further characterized by having a plurality of substantially spheroidal carbides uniformly distributed throughout the consolidated metal powder that are not greater than about 6 microns in major dimension and a plurality of sulfides uniformly distributed throughout the consolidated metal powder wherein the sulfides are not greater than about 2 microns in major dimension. A process for making the elongated steel article is also disclosed.
申请公布号
WO2010030880(A2)
申请公布日期
2010.03.18
申请号
WO2009US56661
申请日期
2009.09.11
申请人
CRS HOLDINGS, INC.;L. KLEIN SA;SCHIESS, OLIVIER;MARECHAL, PIERRE;DEL CORSO, GREGORY, J.
发明人
SCHIESS, OLIVIER;MARECHAL, PIERRE;DEL CORSO, GREGORY, J.