过共晶ZA合金钎焊接头的显微组织及其形态  

Microstructure and morphology of hypereutectic ZA alloy brazed joint

作　　者：何冰清[1] 刘秀忠[2] 杨敏[2] 

机构地区：[1]山东轻工业学院机械工程学院,济南市250353 [2]山东大学材料科学与工程学院,济南市250061

出　　处：《焊接》2009年第4期47-49,共3页Welding & Joining

基　　金：山东省自然科学基金资助项目(Z2008F04)

摘　　要：采用光学显微镜、扫描电镜和X射线衍射等分析手段,对过共晶ZA合金和钎焊接头的组织结构及其特征进行了研究分析。结果表明,用研制的新型高强软钎料钎焊过共晶ZA合金,获得的钎焊接头中有部分交互结晶产生,界面区组织较复杂,既有Cd,Sn,Zn固溶体,又有少量的细小的Mg_2Sn和MgZn化合物;固溶体可以提高钎焊接头的强度和塑性,少量细小的化合物可强化基体组织,有利于强度的提高。Microstructure of hypereutectic ZA alloy brazed joint and its characteristics were studied by optical microscope,SEM and XRDS. The results show that hypereutectic ZA alloy was brazed with the developed high strength solder,and the interaction crystallization appears in the local zone in brazed joint.The compositions and the microstructure are complicated,where there are both solid solutions of Cd,Sn and Zn and small amount fine compound of Mg2Sn,MgZn.The solid solution can improve the strength and plasticity,and the fine compounds can strengthen the structure of the substrate,which is beneficial to the increase of the strength.

关 键 词：ZA合金 钎焊接头 界面区 显微组织 

分 类 号：TG146[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]