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정원택(W. T. Jung),권상우(S. W. Kwon),공유식(Y. S. Kong),김선진(S. J. Kim) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
In this study, dissimilar friction welding were produced using 15mm diameter solid bar in chrome molybedenum steel(SCM440) to carbon steel(S45C) to investigate their mechanical properties and the relationship between the weld parameters and the nondestructive coefficients. The main friction welding parameters were selected to endure good quality welds on the basis of visual examination, tensile tests, Vickers hardness surveys of the bond of area and heat affected zone. The specimens were tested as-welded and post weld heat treated(PWHT). And also, the relationships between the weld parameters and nondestructive coefficients, such as AE counts and ultrasonic attenuation coefficient. The tensile strength of the friction welded steel bars was increased up to 100% of the S45C base metal under the condition of all heating time. The toughness of PWHT specimens is higher than as-welded. It is seem to be that there are not evident relationship between AE counts, ultrasonic attenuation coefficient and heating time.