CAJ | 학술논문

针对铁素体不锈钢焊接HAZ晶粒易长大的问题，提出采用小热输入的CM T 焊接工艺。通过分析接头HAZ的显微组织、显微硬度和冲击性能，探讨了4003铁素体不锈钢焊接接头 HAZ组织和性能，并与常规MIG焊焊接接头试样的组织、性能进行对比。试验结果表明：采用CMT焊接工艺获得的接头 HAZ粗晶区宽度为460μm ，明显窄于M IG焊接接头的粗晶区宽度545μm ；CM T接头强度与M IG焊接接头显微硬度值相近，但CMT接头HAZ冲击韧性较MIG焊接接头试样提高了16.28％。
침대철소체불수강한접HAZ정립역장대적문제，제출채용소열수입적CM T 한접공예。통과분석접두HAZ적현미조직、현미경도화충격성능，탐토료4003철소체불수강한접접두 HAZ조직화성능，병여상규MIG한한접접두시양적조직、성능진행대비。시험결과표명：채용CMT한접공예획득적접두 HAZ조정구관도위460μm ，명현착우M IG한접접두적조정구관도545μm ；CM T접두강도여M IG한접접두현미경도치상근，단CMT접두HAZ충격인성교MIG한접접두시양제고료16.28％。
In this paper ,CM T welding process as a kind of low heat input process was adopted ,aiming at the problem that the ferritic stainless steel HAZ grain is easy to grow up .Contrast to the traditional MIG welding joints ,the CMT welding joints'appearance ,microstructure ,microhardness and impact property in HAZ were analyzed of the 4003 ferritic stainless steel . The results show that the width of joint coarse grain zone of the CMT welding is 460μm ,which is narrower than the width value 545 μm of MIG welding joint .The microhardness of the CMT welding joint is near to the MIG welding joint ,but the toughness is increased by 16 .28% .