한국공작기계학회논문집 (Transactions of the Korean Society of Machine Tool Engineers)

한국생산제조학회 (The Korean Society of Manufacturing Technology Engineers)
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SCNCrM-2B와 SM25C의 마찰용접특성에 관한 연구

A Study on the Properties in Friction Weldability of SCNCrM-2B and SM25C

  • 이세경 (충남대학교 대학원 기계공학과) ;
  • 심영만 (충남대학교 산업대학원) ;
  • 민택기 (충남대학교 기계공학과)
  • 발행 : 2006.08.01
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초록

This study deals with the friction welding of SM25C and SCNCrM-2B; The friction time was variable conditions under the conditions of spindle revolution 2,000rpm, friction pressure of 100MPa, upset pressure of l50MPa, and upset time of 4.0 seconds. Under these conditions, the microstructure of weld interface, tensile fracture surface and mechanical tests were studied, and so the results were as follows. 1. When the friction time is 2.0 seconds, the tensile strength of friction welds was 874MPa, which is around as much as 117% of the tensile strength of base metal(SM25C), the bending strength of friction welds was 1,354MPa, which is around as much as 108.9% of the bending strength of base metal(SM25C). 2. At the same condition, the maximum vickers hardness was Hv443 at SCNCrM-2B nearby weld interface, which is higher Hv20 than condition of the friction time 0.5 seconds. 3. The results of microstructure analysis show that the structures of two base materials have fractionated and rearranged along a column due to heating and axial force during friction, which has affected in raising hardness and tensile strength.

키워드

참고문헌

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