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:
Aug. 23, 1977
Filed:
Aug. 04, 1976
Harry Tanczyn, Baltimore, MD (US);
Armco Steel Corporation, Middletown, OH (US);
Abstract
A method of increasing the abrasion resistance of a heat hardenable chromium-bearing stainless steel, comprising adding at least one of silicon and titanium to a stainless steel melt containing from 0.75% to 10% carbon, 11.5% to 18% chromium, and balance essentially iron, silicon being from about 0.3% to about 4.5%, titanium being from about 0.75% to about 10%. The additions are proportioned such that silicon exceeds 1.5% when titanium exceeds about 1.5% at about 0.75% to about 1.5% carbon, and silicon exceeds 1.5% when titanium exceeds about 4% at carbon greater than 1.75%. A heat hardened steel article or fabricated product having excellent abrasion resistance consists essentially of about 1.8% to about 10% carbon, up to about 1.0% manganese, about 0.45% to about 4.5% silicon, about 11.5% to about 18% chromium, up to about 1% nickel, 1% to about 10% titanium, up to about 1.5% molybdenum, and balance essentially iron, with silicon exceeding 1.5% when titanium exceeds about 4%.