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:
Dec. 04, 2018
Filed:
May. 23, 2012
Kenichi Karimine, Tokyo, JP;
Masaharu Ueda, Tokyo, JP;
Katsuya Iwano, Tokyo, JP;
Hideo Tottori, Tokyo, JP;
Takeshi Yamamoto, Tokyo, JP;
Kenichi Karimine, Tokyo, JP;
Masaharu Ueda, Tokyo, JP;
Katsuya Iwano, Tokyo, JP;
Hideo Tottori, Tokyo, JP;
Takeshi Yamamoto, Tokyo, JP;
NIPPON STEEL AND SUMITOMO METAL CORPORATION, Tokyo, JP;
Abstract
A method of reheating a rail weld zone after rails were welded, a distance C between a reheating region P of a rail web portionand a welding center Q is set to more than or equal to 0.2 times and less than or equal to three times a HAZ length Lh of the rail weld zone. A length B of the reheating region P may be more than or equal to 0.5 times and less than or equal to five times the HAZ length Lh of the rail weld zone. A height A of the reheating region P may be more than or equal to 0.2 times a height Hw of the rail web portion. A temperature Th reached in a reheating process at a center of the reheating region P may be higher than or equal to 400° C. and lower than or equal to 750° C.