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:
May. 13, 1997
Filed:
Jun. 07, 1995
Tsutomu Onuma, Hitachi, JP;
Toshimi Matsumoto, Hitachinaka, JP;
Masami Yada, Hitachi, JP;
Koji Goto, Hitachi, JP;
Osamu Matsushima, Hitachioota, JP;
Hideo Suzuki, Takahagi, JP;
Tatsuo Yonezawa, Hitachi, JP;
Masaki Murashita, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Method of welding a carbon steel and a austenitic stainless steel involves using high density energy beam like a laser beam or electron beam. Welding using high density energy beam is effective to obtain a high precision welding. For the purpose of obtaining both high precision and no cracks, and no deformation, the method of the invention controls the structure of a weld portion to be a mixed structure of an austenitic structure and not greater than 20 wt % of a ferritic structure.