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:
Nov. 04, 1980
Filed:
Jan. 23, 1979
Olof K Franzen, Hedemora, SE;
Ulf Hallstrom, L'Etang la ville, FR;
Bengt A Petersson, Soderfors, SE;
Uddeholms Aktiebolag, Hagfors, SE;
Abstract
A composite steel material consisting of two metallically joined steel components having different chemical compositions is disclosed. The first component is a high-speed tool steel or other high alloy tool steel having a carbon activity and a hardness and wear resistance in the same order as that of high speed tool steel. The second component is a steel consisting essentially of 0.40-0.45 weight percent carbon, 0.40-1.00 weight percent silicon, 0.40-1.00 weight percent manganese, 2.5-4.0 weight percent chromium, 0.50-1.50 weight percent molybdenum, 0.20-0.45 weight percent vanadium, balance iron and normal impurities.