Title:
SPOT-WELDED JOINT AND SPOT WELDING METHOD
Document Type and Number:
WIPO Patent Application WO/2015/115603
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a spot-welded joint and a spot welding method whereby the fracture toughness of spot-welded metal is increased and the strength of the spot-welded joint is improved. The present invention is a spot welding method including a welded part formation step for forming a welded part by current conduction, and a solidifying step for conducting electric current lower than the electric current conducted in the welded part formation step to cause the welded part to solidify, the solidifying step following the welded part formation step. In the solidifying step, electromagnetic vibration is applied to the welded part, and the frequency fV of the electromagnetic vibration, the solidifying rate νS when the welded part solidifies, and the arm spacing λD of dendrites (31a) when the welded part solidifies satisfy the relationship 0.2 ≤ νS/(λD･fV) ≤ 4.0.
Inventors:
WATANABE FUMINORI (JP)
MIYAZAKI YASUNOBU (JP)
MIYAZAKI YASUNOBU (JP)
Application Number:
PCT/JP2015/052690
Publication Date:
August 06, 2015
Filing Date:
January 30, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B23K11/16; B23K11/00; B23K11/12
Foreign References:
| JP2010082665A | 2010-04-15 | |||
| JP5043236B2 | 2012-10-10 | |||
| JP2012187615A | 2012-10-04 | |||
| JP2002103048A | 2002-04-09 | |||
| JP2009125801A | 2009-06-11 | |||
| JP2010115706A | 2010-05-27 | |||
| JP2010059451A | 2010-03-18 | |||
| JP2011025015A | 2011-02-10 | |||
| JP2011194411A | 2011-10-06 |
Other References:
See also references of EP 3100815A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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