Invention Application
WO2010030880A3 FREE-MACHINING POWDER METALLURGY STEEL ARTICLES AND METHOD OF MAKING SAME
审中-公开
自由加工粉末冶金钢制品及其制造方法
- Patent Title: FREE-MACHINING POWDER METALLURGY STEEL ARTICLES AND METHOD OF MAKING SAME
- Patent Title (中): 自由加工粉末冶金钢制品及其制造方法
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Application No.: PCT/US2009056661Application Date: 2009-09-11
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Publication No.: WO2010030880A3Publication Date: 2010-07-15
- Inventor: SCHIESS OLIVIER , MARECHAL PIERRE , DEL CORSO GREGORY J
- Applicant: CRS HOLDINGS INC , KLEIN SA L , SCHIESS OLIVIER , MARECHAL PIERRE , DEL CORSO GREGORY J
- Assignee: CRS HOLDINGS INC,KLEIN SA L,SCHIESS OLIVIER,MARECHAL PIERRE,DEL CORSO GREGORY J
- Current Assignee: CRS HOLDINGS INC,KLEIN SA L,SCHIESS OLIVIER,MARECHAL PIERRE,DEL CORSO GREGORY J
- Priority: US9650408 2008-09-12
- Main IPC: B22F3/15
- IPC: B22F3/15 ; B22F5/12 ; B22F9/08 ; C21D8/06 ; C22C33/02
Abstract:
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.
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