스폿 용접 방법
    3.
    发明授权

    公开(公告)号:KR101738225B1

    公开(公告)日:2017-05-19

    申请号:KR1020147036079

    申请日:2013-06-24

    CPC classification number: B23K11/115 B23K11/11 B23K11/24 B23K11/36

    Abstract: 복잡한제어를필요로하는일 없이, 용이하고또한확실하게날림의발생을방지할수 있어, 스폿용접의적정전류범위를확대할수 있는스폿용접방법을제공하기위해, 본발명의스폿용접방법에서는, 2매이상겹친금속판의겹침부를한 쌍의전극(1) 사이에 100N 이상의하중으로끼워넣음과함께, 전극(1)의선단외주의전체주위의 20% 이상의영역 (a1), (a2), (a3)에있어서겹침부를가압함과함께전극(1)의선단외주의전체주위중 가압하지않는영역 (b1), (b2), (b3)이연속해서전극의선단외주의전체주위의 30% 이하(0%를포함함)로되는가압부재(2)로, 한쌍의전극(1)에의한하중의 5∼1000%의하중으로전극(1)의주위를가압하고, 전극(1)으로부터겹침부에용접전류를통전하여접합하는구성으로하였다.

    강도-연성 균형 및 용접성이 우수한 후강판 및 그 제조방법
    10.
    发明公开
    강도-연성 균형 및 용접성이 우수한 후강판 및 그 제조방법 有权
    强度均衡和焊接性能优良的厚钢板及其制造方法

    公开(公告)号:KR1020060052433A

    公开(公告)日:2006-05-19

    申请号:KR1020050104808

    申请日:2005-11-03

    Abstract: PROBLEM TO BE SOLVED: To provide a high-strength thick steel plate of 590 to 780 MPa class which has improved uniform elongation and an excellent balance between strength and ductility while securing superior base-material toughness and large heat input weldability and also to provide its manufacturing method. SOLUTION: After hot rolling, the resultant thick steel plate having a composition consisting of 0.01 to 0.10% C, 0.05 to 2.0% Si, 1.5 to 7.0% Mn, ≤0.1% (not including 0%) Al, 0.002 to 0.1% Ti, 0.001 to 0.01% N and the balance substantially iron with inevitable impurities is subjected to heat treatment where the thick steel plate is heated and held to and at a heating temperature T hold satisfying (T hold -Ae1)/(Ae3-Ae1)×100=5 to 50. In this way, the fraction of residual γ in the structure of the thick steel plate is made to be 1.0 to 30% and also made to satisfy a specific KTP value to improve the balance between strength and ductility. COPYRIGHT: (C)2006,JPO&NCIPI

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