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:
Nov. 29, 2016
Filed:
Mar. 07, 2014
Hitachi Zosen Corporation, Osaka, JP;
Central Research Institute of Electric Power Industry, Tokyo, JP;
Akikazu Kitagawa, Osaka, JP;
Akio Ohiwa, Osaka, JP;
Keisuke Okada, Osaka, JP;
Katsunori Kusunoki, Osaka, JP;
Tomohiro Tanaka, Osaka, JP;
Akihito Gohda, Osaka, JP;
Yasuhiro Fukai, Osaka, JP;
Masanori Goto, Osaka, JP;
Koji Shirai, Chiba, JP;
HITACHI ZOSEN CORPORATION, Osaka, JP;
CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY, Tokyo, JP;
Abstract
A method to prevent stress corrosion cracking of a storage canister, wherein stress corrosion cracking is prevented by applying a compressive stress to a range where a tensile residual stress is generated on a metallic bodyby welding a coverto a topof the body. A first compressive stress is applied beforehand to a range L of the bodywhere a tensile residual stress is expected to be generated by the welding of the cover, the tensile residual stress is canceled by welding the coverwith a compressive residual stress generated in the range L, and then a second compressive stress is applied so as to generate a compressive residual stress over the range L.