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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.:

US 10988823 B1

PDFFull Text
Date of Patent:
Apr. 27, 2021

Filed:

Mar. 26, 2018

Annealed steel material and method for manufacturing the same

Applicant:

Daido Steel Co., Ltd., Nagoya, JP;

Inventor:

Masamichi Kawano, Nagoya, JP;

Assignee:

DAIDO STEEL CO., LTD., Nagoya, JP;

Attorney:

McGinn I.P. Law Group, PLLC.

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C21D 1/32 (2006.01); C21D 9/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/30 (2006.01); C22C 38/32 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/60 (2006.01); C21D 6/00 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/20 (2006.01); C21D 1/78 (2006.01); C21D 1/26 (2006.01);
U.S. Cl.
CPC ...
C21D 9/0068 (2013.01); C21D 1/26 (2013.01); C21D 1/32 (2013.01); C21D 1/785 (2013.01); C21D 6/002 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/007 (2013.01); C21D 6/008 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/30 (2013.01); C22C 38/32 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/60 (2013.01); C21D 2211/004 (2013.01); C21D 2211/005 (2013.01);
Abstract

The present invention provides an annealed steel material having a composition containing, in mass %, 0.28≤C≤0.42, 0.01≤Si≤1.50, 0.20≤Mn≤1.20, 4.80≤Cr≤6.00, 0.80≤Mo≤3.20, 0.40≤V≤1.20, and 0.002≤N≤0.080, with the balance being Fe and unavoidable impurities; in which the annealed steel material has a cross-sectional size of a thickness of 200 mm or more and a width of 250 mm or more, and a hardness of 100 HRB or less; and in which a diameter of a largest ferritic grain observed in a microstructure is 120 μm or less in terms of a perfect circle equivalent, an area ratio of carbides is 3.0% or more and less than 10.5%, and an average particle diameter of the carbides is 0.18 μm or more and 0.29 μm or less.

Find Patent Forward Citations

Kawano, Masamichi. (2021). Annealed steel material and method for manufacturing the same (U.S. Patent No. 10988823). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10988823

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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