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.

Date of Patent:
Feb. 17, 2015

Filed:

Jul. 31, 2009
Applicants:

Harshad Kumar Dharamshi Hansraj Bhadeshia, Cambridge, GB;

Carlos Garcia-mateo, Madrid, ES;

Peter Brown, Salisbury, GB;

Inventors:

Harshad Kumar Dharamshi Hansraj Bhadeshia, Cambridge, GB;

Carlos Garcia-Mateo, Madrid, ES;

Peter Brown, Salisbury, GB;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/22 (2006.01); C21D 1/18 (2006.01); C21D 1/20 (2006.01); C22C 38/04 (2006.01); C22C 38/24 (2006.01); C22C 38/34 (2006.01);
U.S. Cl.
CPC ...
C22C 38/22 (2013.01); C21D 1/18 (2013.01); C21D 1/20 (2013.01); C22C 38/04 (2013.01); C22C 38/24 (2013.01); C22C 38/34 (2013.01); C21D 2211/002 (2013.01);
Abstract

A steel (known as super bainite steel) containing between 90% and 50% bainite, the rest being austenite, in which excess carbon remains within the bainitic ferrite at a concentration beyond that consistent with equilibrium; there is also partial partitioning of carbon into the residual austenite. In one embodiment of the disclosure, the steel contains in weight percent: carbon 0.6 to 1.1%, silicon 1.5 to 2.0%, manganese 0.5 to 1.8, nickel up to 3%, chromium 1.0 to 1.5, molybdenum 0.2 to 0.5%, vanadium 0.1 to 0.2%, balance iron save for incidental impurities. Excellent properties are obtained if the manganese content is about 1% by weight.


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