Title:
SPOT WELDED JOINT
Document Type and Number:
WIPO Patent Application WO/2014/148341
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a spot welded joint with superior joint strength even when the welded joint is obtained by spot welding high strength steel plates to each other. The spot welded joint is a welded joint obtained by superimposing and spot welding two steel plates with plate thicknesses t1 and t2 and is characterized by the diameter of the nuggets formed by spot welding being 3√{(t1 + t2)/2} or greater (the units for the nugget diameter, t1 and t2 being mm), and, at the cross-sectional surface in the direction of plate thickness, the radius of curvature for both ends in the direction of diameter of the nugget being 0.3(t1 + t2) or greater.
Inventors:
MURAKAMI TOSHIO
Application Number:
PCT/JP2014/056566
Publication Date:
September 25, 2014
Filing Date:
March 12, 2014
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
B23K11/11; B23K11/30; C22C38/00; C22C38/04; C22C38/58
Foreign References:
| US4831228A | 1989-05-16 | |||
| US3689731A | 1972-09-05 | |||
| US20110073572A1 | 2011-03-31 | |||
| US2001688A | 1935-05-14 | |||
| JP2012502801A | 2012-02-02 | |||
| US20050029234A1 | 2005-02-10 | |||
| US2109461A | 1938-03-01 | |||
| DE4039270C1 | 1992-02-27 | |||
| DE4323148A1 | 1995-01-12 | |||
| JP2010240740A | 2010-10-28 | |||
| JP2011194411A | 2011-10-06 | |||
| JPH07178563A | 1995-07-18 |
Other References:
See also references of EP 2977138A4
Attorney, Agent or Firm:
HAMADA Yuriko et al. (JP)
Yuriko Hamada (JP)
Yuriko Hamada (JP)
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