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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 10221464 B1

PDFFull Text
Expired
Date of Patent:
Mar. 05, 2019

Filed:

Mar. 20, 2015

Excellent workability steel wire rod and method for production of same

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Hiroshi Ooba, Tokyo, JP;

Yukihiro Takahashi, Tokyo, JP;

Yoshitaka Nishikawa, Tokyo, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Helene Klemanski

Int. Cl.
CPC ...
C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/40 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C21D 9/52 (2006.01); C21D 8/06 (2006.01); C22C 38/00 (2006.01); C22C 38/18 (2006.01); C21D 1/46 (2006.01);
U.S. Cl.
CPC ...
C21D 9/525 (2013.01); C21D 1/46 (2013.01); C21D 8/06 (2013.01); C21D 8/065 (2013.01); C22C 38/00 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/18 (2013.01); C22C 38/40 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C21D 9/52 (2013.01); C21D 2211/003 (2013.01);
Abstract

The present invention provides a steel wire rod with stable workability. The steel wire rod has steel components containing, by mass %, C: 0.20 to 0.60%, Si: 0.15 to 0.30%, Mn: 0.25 to 0.60%, P: ≤0.020%, S: ≤0.010%, and a balance of Fe and unavoidable impurities, and an internal microstructure including cementite, in which by number ratio, 80% or more of the cementite in a cross-section vertical to a longitudinal direction of the wire rod has a short axis of 0.1 μm or less and a ratio of a long axis to the short axis, defined as an aspect ratio, of 2.0 or less.

Find Patent Forward Citations

Ooba, Hiroshi. (2019). Excellent workability steel wire rod and method for production of same (U.S. Patent No. 10221464). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10221464

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

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