公开(公告)号：EP1078709A2

公开(公告)日：2001-02-28

申请号：EP00118089.2

申请日：2000-08-23

申请人： DAIDO TOKUSHUKO KABUSHIKI KAISHA

发明人： Shimizu, Takao ,  Horio, Hirotsugu, Daido Tokushuko Chitaryo C-317 ,  Kitou, Kazushige ,  Inagaki, Shigeyuki, Daido Tokushuko Tenpakuso 205 ,  Yamada, Ryuzo, Daido Tokushuko Rinkaiso A-301

IPC分类号： B23K13/02

CPC分类号： B23K20/028 ,  B23K20/16 ,  B23K20/22 ,  B23K2201/06

摘要： Carbon steel pipes are joined to each other in a non-oxidizing atmosphere by using an insert constituted by a Ni-base alloy or a Fe-base alloy having a melting point which is lower than 1200°C and a thickness of 80mm or smaller under conditions that the surface roughness Rmax of the joined surfaces of the carbon steel pipes is 20 µm or smaller, the joining temperature is not lower then 1250°C nor higher then 1330°C, duration at the joining temperature is 30 seconds or longer and the pressure is not lower than 2 Mpa nor higher than 4 MPa. The expanding operation is performed such that the maximum difference in level of the joined portion is not larger than 25% of the carbon steel pipe and the expansion ratio is 25% or lower.

摘要翻译： 碳钢管是通过使用以插入由Ni基合金或具有熔点所有这一切是低于1200℃并在一个厚度为80mm或更小的Fe基合金构成接合到在非氧化性气氛中彼此 条件做了碳钢管的接合面的表面粗糙度（Rmax）为20微米或更小，在接合温度为不低于然后1250℃也不在接合温度高于1330℃，时间为30秒或更长的时间和 该压力不大于2兆帕下也不超过4兆帕以上。 扩展操作进行检查的确在接合部分的电平的最大差不在碳钢管的大于25％，膨胀比为25％或更低。