Properties of Friction Welding of Dissimilar Metals WCu-Cu Weld for Electrical Contact Device

전기접점용 이종금속 WCu-Cu 접합재의 마찰압점 특성

  • An, Yong-Ho (Korea Electric Power Research Institute) ;
  • Yun, Gi-Gap (Korea Electric Power Research Institute) ;
  • Min, Taek-Gi (Dept. of Mechanical Engineering, Chungnam National University) ;
  • Han, Byeong-Seong (Dept.of Electronics Information Engineering, Chonbuk National University)
  • Published : 2000.04.01

Abstract

A copper-tungsten sintered alloy(WCu) has been friction-welded to a tough pitch copper (Cu) in order to investigate friction weldability. The maximum tensile strength of the SWu-Cu friction welded joints had cp to 96% of those of the Cu base metal under the condition of friction time 0.6sec, friction pressure 45MPa, upset pressure 125MPa and upset time 5.0sec. And it is confirmed that the tensile strength of friction welded joints are influenced highly by upset pressure rather than friction time. And it is considered that mixed layer was formed in the Cu adjacent side to the weld interface, W particles included in mixed layer induced fracture in the Cu adjacent side to the weld interface and also, thickness of mixed layer was reduced as upset pressure increase.

Keywords

Friction Welding;Brazing;Dissimilar Metals;Tough Pitch Copper;WCu-Cu Electrical Contact Device

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