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:
Jan. 18, 1977
Filed:
Oct. 01, 1974
Applicant:
Inventor:
James H Davidson, Varennes-Vauzelles, FR;
Assignee:
Creusot-Loire, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
C22F / ;
U.S. Cl.
CPC ...
148 203 ; 75171 ; 148 325 ; 148158 ;
Abstract
Cobalt based alloy containing 5% to 30% Ni; 18% to 25% Cr; 5% to 17% of at least one of W, Ta and Mo; 0.10% to 0.30% C; 50 ppm to 200 ppm B; 0 to 0.3% Fe; 0 to 2% Mn; 0 to 1% HF; 0 to 1% La; 0 to 1% Y; 0.5% to 2% in total of Ti and/or Nb, the balance being Co; and a heat treatment for such alloy comprising solution heat treatment in a protective atmosphere at 1150.degree. C to 1250.degree. C for at least 1 hour, rapid cooling, and then age hardening for from 12 to 24 hours at from 750.degree. C to 850.degree. C to effect carbide precipitation of MC carbides, M being titanium or niobium.