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    • 6. 发明申请
    • Welding process for stainless steel piping
    • 不锈钢管道焊接工艺
    • US20060201915A1
    • 2006-09-14
    • US11354910
    • 2006-02-16
    • Takeshi ObanaShoji ImanagaEiji AshidaXiangjun LuoHiroo KoideMitsuaki Haneda
    • Takeshi ObanaShoji ImanagaEiji AshidaXiangjun LuoHiroo KoideMitsuaki Haneda
    • B23K9/04
    • B23K9/0213B23K2101/06B23K2103/05
    • The present invention has an object to reduce residual stress in a tensile direction of a weld on the inner side in contact with reactor water of austenitic stainless steel piping, and to change the residual stress into compressive stress, to reduce stress corrosive cracking. The present invention provides a welding process for stainless steel piping of laminating two types of welding wire made of different materials in a groove of austenitic stainless steel piping, including at least one of a first layer penetration welding step of performing a predetermined back bead width on the back side of the groove bottom and a tack welding step, a first lamination welding step of lamination welding of austenitic stainless steel wire from the bottom to the top of the groove, and a second lamination welding step of lamination welding of nickel-base alloy wire to a final layer at the top of the groove.
    • 本发明的目的是减少与奥氏体不锈钢管道的反应器水接触的内侧的焊缝的拉伸方向的残余应力,并且将残余应力变为压缩应力,以减少应力腐蚀开裂。 本发明提供一种用于在奥氏体不锈钢管道的槽中层叠由不同材料制成的两种类型的焊丝的不锈钢管道的焊接工艺,其包括以下步骤中的至少一个:执行预定的后焊道宽度的第一层穿透焊接步骤 凹槽底部的背面和定位焊接步骤,从底部到顶部的奥氏体不锈钢丝层压焊接的第一层压焊接步骤,以及镍基合金的层压焊接的第二层压焊接步骤 导线到槽顶部的最后层。