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선박용 과급기 로터 접합체(Alloy713LC-AISI 4140)의 이종 마찰용접
염종택(J. T. Yeom),홍재근(J. K. Hong),김정한(J. H. Kim),박노광(N. K. Park),박진형(J. H. Park),김종기(J. K. Kim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
In this work, dissimilar friction welding of turbocharger rotor assembly composed of Alloy 713LC and AISI 4140 was designed with process variables. Process variables of the friction welding were investigated with initial sample shape, friction pressure and time. The quality of welded joins was tested by applying bending stresses in an appropriate jig. Microstructures of the friction welded samples were analyzed with micro-hardness tests and SEMIEDS. FE simulation was carried out to investigate the effect of welding variables in friction welding process on the distributions of the state variables such as strain, strain rate and temperature. The temperature distribution in the heat-affected zone obtained from FE simulation provided a greater understanding of the microstructure evolution during friction welding.