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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10704125 B1

PDFFull Text
Date of Patent:
Jul. 07, 2020

Filed:

Nov. 09, 2016

Free-machining powder metallurgy steel articles and method of making same

Applicants:

Crs Holdings, Inc., Wilmington, DE (US);

Olivier Schiess, Berne, CH;

Pierre Marechal, Rheinfelden, CH;

Inventors:

Olivier Schiess, Berne, CH;

Pierre Marechal, Rheinfelden, CH;

Gregory J. Del Corso, Reading, PA (US);

Alberto Polar-Rosas, Reading, PA (US);

Assignee:

CRS HOLDINGS, INC., Wilmington, DE (US);

Attorney:

Dann, Dorfman, Herrell and Skillman, P.C.

Primary Examiner:

Xiaobei Wang

Int. Cl.
CPC ...
B22F 3/24 (2006.01); B22F 3/15 (2006.01); B22F 5/12 (2006.01); B22F 9/06 (2006.01); C21D 9/52 (2006.01); C21D 8/06 (2006.01); C21D 6/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/18 (2006.01); C22C 38/24 (2006.01); C22C 38/40 (2006.01); C22C 38/16 (2006.01); C22C 38/42 (2006.01); C22C 38/60 (2006.01); C22C 38/22 (2006.01); C22C 38/44 (2006.01); C22C 33/02 (2006.01); C22C 38/46 (2006.01); C21D 1/32 (2006.01); B22F 9/08 (2006.01); C22C 38/00 (2006.01);
U.S. Cl.
CPC ...
C22C 38/46 (2013.01); B22F 3/15 (2013.01); B22F 3/24 (2013.01); B22F 5/12 (2013.01); B22F 9/082 (2013.01); C21D 1/32 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/065 (2013.01); C21D 9/525 (2013.01); C22C 33/0264 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/40 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/60 (2013.01); B22F 2003/248 (2013.01); B22F 2009/0824 (2013.01); B22F 2009/0848 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01); C21D 2211/002 (2013.01); C21D 2211/003 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01);
Abstract

A method of making a small diameter elongated steel article such as wire or strip is disclosed. The method includes the step of melting a steel alloy having the following weight percent composition and the balance is iron and usual impurities. The method includes melting the alloy, atomizing the molten alloy to make a pre-alloyed metal powder, consolidating the metal powder to substantially full density, and then hot working the consolidated metal powder to form an intermediate elongated article. The method further includes a multi-step heat treating process. A small diameter, elongated steel article having enhanced machinability is also disclosed.

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