JOINT PROCESSING METHOD AND DOME MEMBER - MITSUBISHI HEAVY IND LTD

Title:

JOINT PROCESSING METHOD AND DOME MEMBER

Document Type and Number:

WIPO Patent Application WO/2016/047394

Kind Code:

A1

Abstract:

This joint processing method comprises: a friction stir welding step S2 for forming a joint 7 in a plate 5 by friction stir welding a groove 6 in the plate 5; a plastic working step S4 for plastic working the joint 7 under plastic working conditions such that the crystal grain diameter in the joint is not more than the crystal grain diameter of an aluminum alloy in the groove 6 prior to the friction stir welding step S2; and a solutionizing processing step S5 for, subsequent to the plastic working step S4, solutionizing the plate 5. This joint processing method can suppress roughening of the crystal grains of the joint formed by friction stir welding.

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Inventors:

SATO HIROAKI (JP)
AKAMATSU HIROKI (JP)
ENDO TOSHIAKI (JP)

Application Number:

PCT/JP2015/074846

Publication Date:

March 31, 2016

Filing Date:

September 01, 2015

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)

International Classes:

B23K20/12; B21D22/14

Domestic Patent References:

WO2014097631A1

2014-06-26

Foreign References:

JP2003236635A	2003-08-26
JP2014155963A	2014-08-28
JP2009018348A	2009-01-29
JP2007190606A	2007-08-02
JP2002263865A	2002-09-17
JP2008279509A	2008-11-20
JPH1128582A	1999-02-02

Other References: