http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
보론강판이 사용된 용접조인트의 입열량에 따른 기계적 특성 변화
서창희(C. H. Suh),이락규(R. G. Lee),정윤철(Y-C. Jung),박종규(J. K. Park),김양수(Y. S. Kim),김영석(Y. S. Kim) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
To apply boron steel to chassis parts in automobiles, weldability with dissimilar materials is required, as well as formability during hot stamping. Accordingly, this study investigated the effect of the welding heat input on the mechanical properties and the fatigue life of a quenched boron steel and ferrite-bainite (FB) steel lap joint. It was found that, the higher the welding heat input at the weld metal and boron steel HAZ, the lower the hardness. However, at the FB steel HAZ, the hardness was not significantly changed by the welding heat input. Plus, the high hardness of the weld metal and boron steel HAZ prevented the initiation of cracks in the stress concentration area around the bead. While the fatigue life was affected by the residual stress, the variation of the welding heat input used in this study had hardly any affect on the residual stress. Nonetheless, the fatigue life was affected by the bead geometry that changed according to the welding heat input. Thus, for the lap joint, the bead geometry was a significant parameter affecting the fatigue life, which increased when increasing the bead width.