http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Al-Si 용융 도금된 보론강 CO<sub>2</sub> 레이저 용접부의 미세조직과 기계적 성질에 미치는 핫스탬핑 처리의 영향
오명환,공종판,신현정,권민석,정병훈,강정윤,Oh, Myeonghwan,Kong, Jongpan,Shin, Hyeonjeong,Kwon, Minsuck,Jung, Byunghun,Kang, Chungyun 한국레이저가공학회 2013 한국레이저가공학회지 Vol.16 No.3
In this study, Al-Si coated boron steel(1.2 mm) were laser welded by $CO_2$ laser and hot-stamping was applied to the laser joints. Tensile properties and microstructures of the joints were investigated before and after hot-stamping. Tensile and yield strengths of the as welded specimen similar with base metal and fracture occurred base metal of boron steel. Although, in case of heat treated specimen, fracture occurred fusion zone that Al segregated zone near the bond line. These could be explained by the existence of ferrite, in the Al segregated zone near the bond line and base metal of boron steel. Before hot-stamping, hardness of base metal is lower than fusion zone and heat affected zone in spite of exist Al segregation zone($Fe_3$(Al,Si)). So fracture occurred base metal. Although, after hot-stamping, microstructure of base metal and welds zone transformed to martensite and bainite except in Al segregation zone near the bond line that $Fe_3$(Al,Si) transformed to a-ferrite. So fracture occurred Al segregation zone near the bond line.