Title:
MAG PULSE ARC WELDING METHOD OF GALVANIZED STEEL SHEET
Document Type and Number:
Japanese Patent JP3188821
Kind Code:
B2
Abstract:
PURPOSE: To make it possible to extremely lessen the occurrence of blowhole defects, such as pits and blowholes, and to obtain weld beads having good appearance free from sagging down of the beads in difficult position welding, such as vertical welding and three o'clock welding.
CONSTITUTION: A solid wire for welding galvanized steel sheets contg. 0.02 to 0.10wt.% C, 0.3 to 0.7wt.% Si and 1.5 to 3.0wt.% Mn as basic alloy components and a shielding gas which consists of a gaseous mixture composed of gaseous argon and gaseous CO2 and has a gaseous CO2 mixing ratio of 50 to 10vol.% are used at the time of subjecting the galvanized steel sheets to MAG pulse arc welding. The galvanized steel sheets are subjected to MAG pulse arc welding by executing globule transfer by short circuit during a base current period by setting the welding voltage in such a manner that the peak current value attains 450 to 600A, the peak current period attains 1.0 to 2.0ms and the value of the short circuit transfer rate (r) attains a range of r=0.7 to 1.0.
Inventors:
Masaharu Sato
Susumu Imaoka
Takeshi Koyama
Susumu Imaoka
Takeshi Koyama
Application Number:
JP11579095A
Publication Date:
July 16, 2001
Filing Date:
May 15, 1995
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
B23K9/16; B23K9/073; B23K9/09; B23K9/173; B23K9/23; B23K35/30; H02M9/00; (IPC1-7): B23K9/073; B23K9/09; B23K9/16; B23K9/173; B23K9/23; B23K35/30; H02M9/00
Domestic Patent References:
| JP4135088A | ||||
| JP1202394A | ||||
| JP6328253A | ||||
| JP2290674A |
Attorney, Agent or Firm:
Yoshiyuki Kaji
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