METHOD FOR MANUFACTURING PIPE JOINT AND PIPE JOINT

WIPO Patent Application WO/2016/038691

A1

This method for manufacturing a pipe joint is a method for manufacturing a pipe joint wherein a second metal pipe (20) is joined to an outside side surface of a first metal pipe (10). The method includes, in this order, a first step for preparing the first metal pipe (10), which is provided with a through hole (12) and a protruding part that "is formed so as to surround the through hole (12), has an inclined outer surface, and protrudes toward the outside from the side surface of the first metal pipe (10)", and the second metal pipe (20), which is provided with an inside surface end part, and a second step for solid state diffusion bonding of the metal pipes by electrifying while applying pressure between the protruding part and the inside surface end part. Thereby, a pipe joint with residual compressive stress in the joint part can be manufactured. Thus, it is possible to increase the durability for corrosion and the durability for metal fatigue of the pipe joint that is manufactured, suppress reductions in strength of the manufactured pipe joint, and increase productivity.

HARADA AKIRA (JP)
HARADA KAZUYOSHI (JP)
NOZUE AKIRA (JP)

PCT/JP2014/073837

March 17, 2016

September 09, 2014

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MIYATA CO LTD (JP)
TK CO LTD (JP)

B23K11/02; B23K20/00

WO2012026205A1

2012-03-01

JPS59172878U	1984-11-19
JPS59151211U	1984-10-09
JP2004174532A	2004-06-24
JPH02197382A	1990-08-03
JP2014097526A	2014-05-29
JPH1015625A	1998-01-20
JP2013169568A	2013-09-02
JP2011255420A	2011-12-22
JPH04100614A	1992-04-02
JPH01205889A	1989-08-18
DE2557605A1	1977-06-30

MATSUO, NOBUTAKA (JP)
Masatake Matsuo (JP)

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