AZ31B镁合金点焊接头的断口特征和耐蚀性分析  

Analysis of fractography and corrosion resistance of spot-welding joints of AZ31B magnesium alloy

作　　者：范伟光[1] 程艳艳[1] 马天凤[1] 沈启明[1] 徐加有[1] 

机构地区：[1]长春工业大学材料科学与工程学院,吉林长春130012

出　　处：《电焊机》2007年第10期59-62,共4页Electric Welding Machine

摘　　要：利用DN-100型固定式点焊机对AZ31B镁合金进行焊接,采用X射线衍射仪对点焊接头进行物相分析;用光学显微镜对点焊接头进行金相分析;用SEM研究点焊接头断口的微观形貌;并对焊接接头耐蚀性进行实验研究。结果表明,AZ31B镁合金母材为韧性断裂,点焊接头为脆性断裂,点焊接头的断裂倾向比母材大,耐蚀性不及母材。Welding was conducted for AZ31B magnesium alloy by using a fixed spot-welding machine DN-100,then the phase of spot-welding joints was analyzed by using X-ray dfffractometer;the metallurgical phase of spot-welding joints was analyzed by using optical microscope;the fracture micro-appearance of spot-welding joints was studied by using SEM ;and corrosion resistance experiment of spot-welding joints was studied.Results show that AZ31B magnesium alloy spot-welding joints and base material were brittle fracture, fracture tendency of spot-welding joints w,s more. ser/ous than base material, and corrosion resistance of spot-welding joints was worse than base material.

关 键 词：镁合金 点焊 断口 耐蚀性 

分 类 号：TG457.1[金属学及工艺—焊接]