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    • 2. 发明公开
    • 강재의 용접 이음부에 있어서의 열 영향부의 인성 향상방법
    • 增加钢产品焊接接头加热部分韧性的方法
    • KR1020050065665A
    • 2005-06-29
    • KR1020057007741
    • 2003-10-29
    • 신닛테츠스미킨 카부시키카이샤
    • 이시카와다다시나카시마기요타카노세데쓰로
    • C21D7/06
    • C21D7/06B23K20/10B23K33/004B23K2203/04C21D7/04C21D9/50C21D10/00Y10T29/4578Y10T29/4583
    • A method of increasing the toughness of heat-affected part of multilayer welded joint, lap fillet welded joint or one or more pass high heat input welded joint with respect to steel products. In particular, a method of increasing the toughness of heat- affected part of steel product welded joint, characterized in that beating by means of ultrasonic vibration terminal or shot-peening by means of ultrasonic vibration steel balls is applied to the surface of heat-affected part formed by final pass of steel product multilayer welded joint, so that in a metal structure adjacent to fusion line (FL) of welded metal and host metal at the heat-affected part formed by final pass, the average of major diameters of crystals lying in the zone from steel product surface to depth of 2 mm or more becomes equal to the crystal grain diameter of host metal before welding at a depth of 1/4 of sheet thickness (t) from the steel product surface.
    • 一种提高多层焊接接头,搭接圆角焊接接头或一个或多个通过高热输入焊接接头的热影响部分的韧性的方法。 特别是提高钢制品焊接接头的受热部分的韧性的方法,其特征在于,通过超声波振动终端或超声波振动钢丸进行喷丸处理,对受热影响的表面施加 通过钢产品多层焊接接头的最终通过形成的部分,使得在与最终通过形成的热影响部分处的焊接金属和主体金属的熔合线(FL)相邻的金属结构中,晶体的主要直径平均 在从钢制品表面到2mm以上的深度的区域中,在与钢制品表面的厚度(t)的1/4的深度焊接之前,变得等于主体金属的晶粒直径。