logo

For the Inventor, By the Inventor

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.:

US 9987706 B1

PDFFull Text
Date of Patent:
Jun. 05, 2018

Filed:

May. 15, 2013

Method for producing a stainless steel diffusion-bonded product

Applicant:

Nisshin Steel Co., Ltd., Tokyo, JP;

Inventors:

Atsushi Sugama, Yamaguchi, JP;

Yukihiro Nishida, Yamaguchi, JP;

Kazuyuki Kageoka, Yamaguchi, JP;

Yoshiaki Hori, Yamaguchi, JP;

Manabu Oku, Yamaguchi, JP;

Assignee:

NISSHIN STEEL CO., LTD., Tokyo, JP;

Attorney:

Clark & Brody

Primary Examiner:

Devang R Patel

Int. Cl.
CPC ...
B23K 20/00 (2006.01); C22C 38/00 (2006.01); B23K 20/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C21D 9/50 (2006.01); B23K 35/30 (2006.01); B23K 20/227 (2006.01); C21D 6/00 (2006.01); B23K 103/04 (2006.01);
U.S. Cl.
CPC ...
B23K 20/023 (2013.01); B23K 20/00 (2013.01); B23K 20/02 (2013.01); B23K 20/227 (2013.01); B23K 35/308 (2013.01); B23K 35/3086 (2013.01); C21D 9/50 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (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 38/54 (2013.01); B23K 2203/05 (2015.10); C21D 6/002 (2013.01);
Abstract

A method for producing a stainless steel diffusion-bonded product provides a stainless steel material diffusion-bonded product having excellent reliability of the bonded portion by using a direct method, which includes directly contacting stainless steel materials with each other to unify the materials together by diffusion bonding. At least one of the stainless steel materials to be contacted is dual-phase steel having an austenite transformation starting temperature Acpoint of 650 to 950° C. during the temperature elevation and having an austenite+ferrite dual-phase temperature region in the range of 880° C. or higher. Diffusion bonding is advanced under conditions such that the contact surface pressure is in the range of 1.0 MPa or less and the heating temperature is in the range of from 880 to 1,080° C. while being accompanied by the movement of grain boundary caused when the ferrite phase in the dual-phase steel undergoes transformation to an austenite phase.

Find Patent Forward Citations

Loading…