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:
Oct. 30, 2018
Filed:
Feb. 25, 2016
Hanzheng Huang, Nieuwegein, NL;
Mohamed Sherif, Hilversum, NL;
Hanzheng Huang, Nieuwegein, NL;
Mohamed Sherif, Hilversum, NL;
AKTIEBOLAGET SKF, Gothenburg, SE;
Abstract
A steel alloy for a bearing, the alloy having a composition comprising: (a) from 0.5 to 0.9 wt. % carbon, (b) from 1.2 to 1.8 wt. % silicon, (c) from 1.1 to 1.7 wt. % manganese, (d) from 0.7 to 1.3 wt. % chromium, (e) from 0.05 to 0.6 wt. % molybdenum, and optionally any of: (f) from 0 to 0.25 wt. % nickel, (f) from 0 to 0.02 wt. % vanadium, (f) from 0 to 0.05 wt. % aluminium, (f) from 0 to 0.3 wt. % copper, (f) from 0 to 0.5 wt. % cobalt, (f) from 0 to 0.1 wt. % niobium, (f) from 0 to 0.1 wt. % tantalum, (f) from 0 to 150 ppm nitrogen, (f) from 0 to 50 ppm calcium, and (f) the balance iron, together with any unavoidable impurities, wherein the steel alloy has a microstructure comprising bainitic ferrite and retained austenite, and a hardness (Vickers) of at least 650 HV.