Invention Grant
- 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
-
Application No.: US12558066Application Date: 2009-09-11
-
Publication No.: US08282701B2Publication Date: 2012-10-09
- Inventor: Olivier Schiess , Pierre Marechal , Gregory J. Del Corso
- Applicant: Olivier Schiess , Pierre Marechal , Gregory J. Del Corso
- Applicant Address: US DE Wilmington
- Assignee: CRS Holdings, Inc.
- Current Assignee: CRS Holdings, Inc.
- Current Assignee Address: US DE Wilmington
- Agency: Dann, Dorfman, Herrell and Skillman, P.C.
- Main IPC: B22F5/12
- IPC: B22F5/12 ; 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.
Public/Granted literature
- US20100068547A1 Free-Machining Powder Metallurgy Steel Articles and Method of Making Same Public/Granted day:2010-03-18
Information query