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:
May. 04, 1999
Filed:
Dec. 15, 1997
Joseph E McVicker, Chillicothe, IL (US);
Kenneth W Burris, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A steel article has a composition, by weight percent, including from 0.20 to 0.45 carbon, from 0.4 to 1.5 manganese, from 0.5 to 2.0 silicon, from 0.01 to 2.0 chromium, from 0.15 to 1.2 molybdenum, from 0.01 to 0.40 vanadium, from 0.01 to 0.25 titanium, from 0.005 to 0.05 aluminum, from 0.0001 to 0.010 boron, less than 0.002 oxygen, from 0.005 to about 0.017 nitrogen, and the balance essentially iron. The steel article is free of any detrimental aluminum nitride and has, after quenching and tempering, a fully martensitic microstructure and a controlled distribution of spaced apart micrometer size titanium nitride cuboids and nanometer size background carbonitride precipitates.