Title:
狭開先ガスシールドアーク溶接方法
Document Type and Number:
Japanese Patent JP5861785
Kind Code:
B2
Abstract:
A method for gas-shielded arc welding to join thick steel materials having a sheet thickness of 22 mm or more by narrow-groove multilayer welding, a bottom portion groove angle being 10° or less, and a bottom portion groove gap being 7-15 mm, includes using two passes or more for initial layer welding, distributing the passes over both sides of the bottom portion groove gap, and controlling a feed angle of a weld wire fed from a power supply tip of a welding torch end to be 5-15° with respect to a perpendicular line so as to set a depth of fusion at a bottom portion of the thick steel materials to be 1.5 mm or more. Even when using low-cost groove formation by gas cutting, plasma cutting, or the like, defects such as high-temperature cracks and lack of fusion can effectively be prevented without treating the groove face.
Inventors:
Tokihiko Kataoka
Hiroyuki Kado
Yasushi Kitani
Kenji Oi
Koichi Yasuda
Hiroyuki Kado
Yasushi Kitani
Kenji Oi
Koichi Yasuda
Application Number:
JP2014551164A
Publication Date:
February 16, 2016
Filing Date:
December 03, 2013
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B23K9/173; B23K9/16; B23K33/00
Domestic Patent References:
| JPS63207475A | 1988-08-26 | |||
| JPS60210368A | 1985-10-22 |
Attorney, Agent or Firm:
Kenji Sugimura
Keisuke Kawahara
Keisuke Kawahara