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:
Dec. 02, 1980
Filed:
Sep. 28, 1978
Applicant:
Inventors:
Leif S Lindholm, Hagersten, SE;
Jan N Lindstrom, Norsborg, SE;
Assignee:
Sandvik Aktiebolag, Sandviken, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ; C22C / ;
U.S. Cl.
CPC ...
75238 ; 75202 ; 7520 / ; 428552 ; 148126 ;
Abstract
A sintered hard metal body composed of at least one carbide as tungsten carbide and a binder phase consisting essentially of cobalt and/or nickel, the hard metal body being provided with a boronized surface zone having a thickness of 1-100 .mu.m characterized in that the hard metal contains small additions of up to about 5 percent by volume of the hard metal body of cubic carbides as VC, TiC, TaC, Mo.sub.2 C, ZrC, NbC and/or Cr.sub.3 C.sub.2, the content of binder phase is 6-40% of the volume of the body, and the mean grain size of the tungsten carbide is 0.2-1.5 .mu.m. The process of forming said body is also disclosed.