Title:
WELD-TARGET PLATE MATERIAL BUTT LASER WELDING METHOD
Document Type and Number:
Japanese Patent JP2016016420
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a weld-target plate material butt laser welding method capable of dispensing with a highly accurate filler wire control, preventing lack of fusion and poor weld such as insufficient melt of a filler wire, and obtaining a high-quality laser weld joint.SOLUTION: A method comprises: a groove forming step S1 of forming a groove so as to provide a groove root face portion 3 in part of each of end surfaces of two weld-target plate materials 1, 2 so that the weld-target plate materials 1, 2 are butt against each other and to provide a groove opening portion 4 in any one of upper and lower portions of the groove root face portion 3; a butting step S2 of causing the two weld-target plate materials 1, 2 to butt against each other so that the groove root face portions 3 contact each other; a root-face-portion welding step S3 of irradiating each groove root face portion 3 with a laser beam and forming a complete joint penetration weld zone; and a multilayer-weld-zone forming step S4 of forming a multilayer weld zone only by irradiating the groove opening portion 4 in which the complete joint penetration weld zone is formed with a laser beam.SELECTED DRAWING: Figure 1
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Inventors:
SOGA SACHIHIRO
TARASAWA SHO
ASHIDA EIJI
TARASAWA SHO
ASHIDA EIJI
Application Number:
JP2014140091A
Publication Date:
February 01, 2016
Filing Date:
July 08, 2014
Export Citation:
Assignee:
HITACHI GE NUCLEAR ENERGY LTD
International Classes:
B23K26/21; B23K28/02; B23K33/00
Domestic Patent References:
| JP2003001479A | 2003-01-08 | |||
| JP2012000630A | 2012-01-05 | |||
| JPH0857670A | 1996-03-05 | |||
| JP2014036995A | 2014-02-27 | |||
| JP2013018038A | 2013-01-31 |
Attorney, Agent or Firm:
Polaire Patent Business Corporation
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