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:
Aug. 31, 2010
Filed:
Mar. 31, 2004
Masaaki Tabuchi, Tsukuba, JP;
Hirokazu Okada, Tsukuba, JP;
Masayuki Kondo, Tsukuba, JP;
Susumu Tsukamoto, Tsukuba, JP;
Fujio Abe, Tsukuba, JP;
Masaaki Tabuchi, Tsukuba, JP;
Hirokazu Okada, Tsukuba, JP;
Masayuki Kondo, Tsukuba, JP;
Susumu Tsukamoto, Tsukuba, JP;
Fujio Abe, Tsukuba, JP;
National Institute for Materials Science, Ibaraki, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A welded joint of a tempered martensitic heat resisting steel includes a fine-grained heat affected zone of weldment of a heat resisting steel having a tempered martensite structure which exhibits a creep strength of 90% or more of the creep strength of the base metal thereof. The welded joint is inhibited in the formation of the fine-grained HAZ exhibiting a significantly reduced creep strength.