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.:
Date of Patent:
Oct. 31, 1978
Filed:
Feb. 23, 1977
Applicant:
Inventors:
Kentaro Takahashi, Ohmiya, JP;
Shigeru Urano, Ohmiya, JP;
Assignee:
Nippon Piston Ring Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
75211 ; 75200 ; 428567 ; 428569 ;
Abstract
A method of producing a ferrous alloy material having improved wear resistance comprising (1) mixing powders of a ferrous alloy, tungsten and optionally at least one element selected from the group consisting of C, Ni, Mn, Mo, Cr, and Cu, (2) sintering the mixture of powders of step (1) to form a sintered product, (3) infiltrating the sintered product of step (2) with molten copper or a copper alloy to produce an infiltrated sintered product and (4) cooling the infiltrated sintered product of step (3).