Title:
WELDING METHOD OF HIGH TENSION STEEL MATERIAL
Document Type and Number:
Japanese Patent JP2020157344
Kind Code:
A
Abstract:
To provide a welding method of a high tension streel material capable of restraining the occurrence of a low temperature crack.SOLUTION: A welding joint is welded by multilayer welding by using a welding material by butting mutual groove-processed high tension steel materials. A welding joint is provided by laminating welding metal to a residual area in a groove after covering the whole area of a groove surface by laminating the welding metal of a plurality of layers along the groove surface up to reaching an upper end part of the groove in welding. Thus, a residual quantity of diffusible hydrogen in the welding metal is reduced. According to the present invention, the occurrence of a low temperature crack is restrained without preheating or even when preheated by a low preheating temperature of 55°C or lower.SELECTED DRAWING: Figure 1
More Like This:
Inventors:
KURODA MINORU
KOZUKI TADAHEI
HAYAKAWA NAOYA
KOZUKI TADAHEI
HAYAKAWA NAOYA
Application Number:
JP2019060175A
Publication Date:
October 01, 2020
Filing Date:
March 27, 2019
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
B23K9/23; B23K9/04; B23K9/235
Attorney, Agent or Firm:
Kenichiro Ochiai