CAJ | 학술논문

采用填丝钨极氩弧焊（GTAW）方法对复层厚度0.3 mm的叠层复合材料与Cr18-Ni8不锈钢进行焊接实验。通过显微图像分析仪和扫描电镜等对焊缝及热影响区的微观组织及显微硬度、元素分布等进行分析。结果表明：叠层复合材料NiCr基层与焊缝形成可靠的熔合,超级镍复层与焊缝过渡区显微硬度升高;不锈钢母材侧形成了明显的重结晶细晶粒区及δ铁素体析出相区;填丝钨极氩弧焊要注意超级镍复层的烧损,应控制焊接电弧偏向不锈钢一侧。
채용전사오겁아호한（GTAW）방법대복층후도0.3 mm적첩층복합재료여Cr18-Ni8불수강진행한접실험。통과현미도상분석의화소묘전경등대한봉급열영향구적미관조직급현미경도、원소분포등진행분석。결과표명：첩층복합재료NiCr기층여한봉형성가고적용합,초급얼복층여한봉과도구현미경도승고;불수강모재측형성료명현적중결정세정립구급δ철소체석출상구;전사오겁아호한요주의초급얼복층적소손,응공제한접전호편향불수강일측。
A laminated composite with a thickness of 0.3 mm cover layer and Cr18-Ni8 steel were joined by gas tungsten arc welding（GTAW）.Microstructures,micro-hardness,and element distribution in the welded meal and heat affected zone were investigated by micro-image analysis and scanning electron microscopy.It was found that there was a reliable fusion zone between the laminated composite and the weld metal.Micro-hardness in the transition of the cover layer and welded metal increased.Fine grains and δ ferrite precipitation were produced in the welded metal near to the Cr18-Ni8 side.The burning down of the cover layer should be avoided and the welding arc should deflect to the Cr18-Ni8 side during GTAW.