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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 10563357 B1

PDFFull Text
Expired
Date of Patent:
Feb. 18, 2020

Filed:

May. 29, 2015

Rail and production method therefor

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Masaharu Ueda, Kitakyushu, JP;

Teruhisa Miyazaki, Kitakyushu, JP;

Takuya Tanahashi, Kitakyushu, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Zachary L Kuhfuss

Int. Cl.
CPC ...
E01B 5/02 (2006.01); C21D 9/04 (2006.01); C21D 1/06 (2006.01); C21D 8/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/18 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/30 (2006.01); C22C 38/32 (2006.01); C22C 38/40 (2006.01);
U.S. Cl.
CPC ...
E01B 5/02 (2013.01); C21D 1/06 (2013.01); C21D 8/005 (2013.01); C21D 9/04 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/18 (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 38/40 (2013.01); C21D 2211/002 (2013.01); C21D 2211/009 (2013.01);
Abstract

A rail provided by the present invention includes: has a predetermined chemical components, wherein, in a region from a head surface constituted of a surface of a top head portion and a surface of a corner head portion to a depth of 10 mm, a total amount of pearlite structures and bainite structures is 95% by area or more, and an amount of the bainite structures is 20% by area or more and less than 50% by area, and an average hardness of the region from the head surface to a depth of 10 mm is in a range of Hv 400 to Hv 500.

Find Patent Forward Citations

Ueda, Masaharu. (2020). Rail and production method therefor (U.S. Patent No. 10563357). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10563357

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

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