Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effects on the Joining Condition of TiAl Alloy and SCM440 by Servo Motor Type Friction Welding

서보모터방식 마찰용접을 이용한 TiAl 합금과 SCM440의 접합에 미치는 용접조건의 영향

  • Park, Jong-Moon (School of Materials Science and Engineering, Kumoh National Institute of Technology) ;
  • Kim, Ki-Young (School of Materials Science and Engineering, Kumoh National Institute of Technology) ;
  • Kim, Kyoung-Kyun (Asan Friction Welding Co., Ltd.) ;
  • Oh, Myung-Hoon (School of Materials Science and Engineering, Kumoh National Institute of Technology)
  • Received : 2016.02.11
  • Accepted : 2016.02.25
  • Published : 2016.03.30
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Abstract

In this study, characteristics of TiAl alloy and SCM440 (Cr-Mo steel) have been investigated with the various joining condition by servo motor type friction welder. The experimental factors of friction welder used in this study are spindle revolution, friction speed, and distance, upset speed and distance, respectively. Servo motor type friction welder could be controlled by the level of oil pressure, and it could be performed by position control dependence of electrical energy. Mechanical properties and morphology of welded interface were characterized by various joining condition. This aroused due to the bond strength dependence on friction heat and size of the heat affected zone. Therefore, it is necessary to have enough friction heat and decreased heat affected zone for good friction welding between dissimilar metals. An optimum bond was obtained between TiAl alloy and SCM440 by controlling friction speed and distance. At the spindle revolution 4,000 rpm, friction speed 120 mm/min, friction distance 15 mm, the bond strength was found to be 312 MPa.

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References

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