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:
Jun. 14, 2016
Filed:
Mar. 09, 2012
Applicants:
Yusuke Oikawa, Tokyo, JP;
Shinji Tsuge, Tokyo, JP;
Hiroshige Inoue, Tokyo, JP;
Ryo Matsuhashi, Tokyo, JP;
Inventors:
Yusuke Oikawa, Tokyo, JP;
Shinji Tsuge, Tokyo, JP;
Hiroshige Inoue, Tokyo, JP;
Ryo Matsuhashi, Tokyo, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/58 (2006.01); C22C 38/00 (2006.01); C21D 6/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01); C21D 8/02 (2006.01); B23K 35/30 (2006.01); B23K 35/02 (2006.01);
U.S. Cl.
CPC ...
C22C 38/005 (2013.01); B23K 35/0261 (2013.01); B23K 35/308 (2013.01); B23K 35/3053 (2013.01); C21D 6/004 (2013.01); C21D 8/0226 (2013.01); C21D 8/0263 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/52 (2013.01); C22C 38/54 (2013.01); C22C 38/58 (2013.01); C21D 2211/001 (2013.01); C21D 2211/005 (2013.01);
Abstract
A nitrogen-rich two-phase stainless steel that has corrosion resistance equal to that of standard type of two-phase stainless steel and is not susceptible to corrosion in a welding heat-affected part, wherein the austenite phase area ratio is 40-70%, the PI value expressed by formula (1) is 30-38, the NI value expressed by formula (2) is 100-140, and the γpre expressed by formula (3) is 1350-1450. (1) PI=Cr+3.3Mo+16N (2) NI=(Cr+Mo)/N.