Cu基微晶钎料高频钎焊0Cr18Ni9Nb／YG6分析  

High frequency brazing of 0Cr18Ni9Nb to YG6 using Cu-based microcrystalline brazing alloys

作　　者：翟秋亚[1] 梁存琨[1] 成军[1] 徐锦锋[1] 

机构地区：[1]西安理工大学材料科学与工程学院,西安710048

出　　处：《焊接学报》2008年第9期23-26,共4页Transactions of The China Welding Institution

基　　金：陕西省自然科学基金资助项目(2006E134和2006E120);西安理工大学校基金资助项目(210607);西安市科技创新支撑计划基金资助项目(cxy08001)

摘　　要：应用Cu-xSn(x=7,13.5,质量分数%)微晶钎料对0Cr18Ni9Nb不锈钢与YG6硬质合金进行了高频钎焊,分析了钎焊接头的相组成、组织形态和界面元素分布特征,探索了钎料成分和原子互扩散与接头组织之间的相关规律。结果表明,在感应钎焊过程中,Cu基微晶钎料表现出了良好的润湿性和铺展性,液态钎料与母材之间发生了一定程度的原子互扩散,实现了0Cr18Ni9Nb/YG6的焊接。钎接接头组织致密均匀,无夹渣和气孔缺陷产生。0Cr18Ni9Nb/Cu-xSn/YG6钎缝组织由-αCu固溶体和少量金属间化合物组成,钎料中锡含量的增加使钎缝化合物数量有所增加。近界面母材组织无明显粗化现象。The high frequency brazing of 0Cr18Ni9Nb stainless steel to YG6 cemented carbide was conducted by using Cu-xwt%Sn(x=7,13.5) microcrystalline brazing alloys,and the phase constitution,microstructural morphology and interfacial element distribution characteristics of brazing joint were investigated.The relationship between the microstructure of joint and the composition of brazing alloy together with atom mutual diffusion behavior was analyzed.The experimental results show that the Cu-based microcrystalline brazing alloys perform an excellent wettability and spreadability in induction brazing process.Owing to the atom mutual diffusion between the liquid Cu-based brazing alloys and the base metal to a certain extent,the metallurgical bonding of 0Cr18Ni9Nb to YG6 has achieved.The joint microstructure is dense and homogeneous,which has no defects such as slag inclusion and porosity etc.The microstructure of brazing seam consists mainly of α-Cu solid solution and a few of intermetallic compounds in the 0Cr18Ni9Nb/ Cu-xwt%Sn/YG6 joint,and the quantity of intermetallic compounds increases with the rise of Sn content.The base metals near the interface have no obvious coarsening appearance.

关 键 词：微晶钎料 高频钎焊 界面 接头组织 

分 类 号：TG135.5[一般工业技术—材料科学与工程]