Title:
SHIELD GAS, WELDING METHOD USING THE SAME, AND OBJECT TO BE WELDED
Document Type and Number:
Japanese Patent JP2007044741
Kind Code:
A
Abstract:
To deepen penetration of a weld metal part without degrading a welding quality by setting an adequate welding condition.
A shield gas is used, the concentration of which is set to ≥0.2 vol.% (preferably, ≥0.4 vol.%) by adding gaseous oxygen to gaseous helium. By setting the oxygen concentration in the weld metal to 70-700 ppm, the penetration depth of the weld metal is increased, and the dimensional ratio D/W of the weld metal is increased. The penetration depth is further increased without degrading the welding quality by performing the welding while satisfying at least one of the welding conditions of the welding current, the welding rate and the adequate range of the arc length.
Inventors:
OCHIAI TOSHIMITSU
SATO TOYOYUKI
FUJII HIDETOSHI
NOSHIRO KIYOSHI
RIKU YOSHIHEI
SATO TOYOYUKI
FUJII HIDETOSHI
NOSHIRO KIYOSHI
RIKU YOSHIHEI
Application Number:
JP2005233162A
Publication Date:
February 22, 2007
Filing Date:
August 11, 2005
Export Citation:
Assignee:
TAIYO NIPPON SANSO CORP
UNIV OSAKA
UNIV OSAKA
International Classes:
B23K9/16; B23K9/167
Domestic Patent References:
| JP2003311414A | 2003-11-05 | |||
| JP2003019561A | 2003-01-21 | |||
| JP2002239728A | 2002-08-28 | |||
| JP2001001183A | 2001-01-09 | |||
| JP2004298963A | 2004-10-28 | |||
| JP2000317633A | 2000-11-21 | |||
| JPH0910943A | 1997-01-14 |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
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