| 发明名称 |
SPOT WELDING METHOD FOR ULTRA-HIGH STRENGTH STEEL SHEET |
| 摘要 |
<p>The present invention relates to a spot welding method for an ultrahigh-strength steel sheet with a tensile strength of 800 Mpa or greater comprising the steps of: conducting a primary power passage on a spot region for welding of the ultrahigh-strength steel sheet; cooling the spot region by cutting off an electric current for a time proportionate to the thickness of the ultrahigh-strength steel sheet; and conducting a secondary power passage with the magnitude of an electric current proportionate to the magnitude of the electric current of the primary power passage for a time proportionate to the time for cutting off the electric current to the spot region.</p> |
| 申请公布号 |
KR20150075572(A) |
申请公布日期 |
2015.07.06 |
| 申请号 |
KR20130163656 |
申请日期 |
2013.12.26 |
| 申请人 |
POSCO |
发明人 |
CHOI, DU YOUL;SON, WON QEUN |
| 分类号 |
B23K11/11;B23K11/24 |
主分类号 |
B23K11/11 |
| 代理机构 |
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代理人 |
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| 主权项 |
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