Sn对Cu-Sn-Ti钎料显微组织与性能的影响
Effect of Sn on the microstructure and properties of Cu-Sn-Ti brazing filler metal
杜全斌 1张黎燕 1李昂 1崔冰 2黄俊兰3
作者信息
- 1. 河南机电职业学院,河南省超硬材料智能制造装备集成重点实验室,郑州, 451191
- 2. 安徽工业大学,教育部先进金属材料绿色制造与表面技术重点实验室,马鞍山, 243002
- 3. 郑州机械研究所有限公司,新型钎焊材料与技术国家重点实验室,郑州, 450001
- 折叠
摘要
为揭示Sn调控Cu-Sn-Ti钎料显微组织与力学性能的规律,采用真空非自耗熔炼法制备Cu-Sn-Ti钎料,利用扫描电镜、X射线衍射仪、能谱仪、万能材料试验机等,研究了Sn对Cu-Sn-Ti钎料的显微组织、显微硬度、剪切强度及断口形貌的影响.结果表明,钎料显微组织随Sn含量增加而演变的规律为:枝晶状初生α-Cu基体相 + 共晶组织 + 晶间组织→初生α-Cu基体相 + 共晶组织→共晶组织→初生CuSn3Ti5 相 + 粗化共晶组织 + α-Cu基体相(富Sn)+ Cu41Sn11 相 + SnTi3 相,其中晶间组织为α-Cu相和CuSn3Ti5 相的混合组织 + 少量的(SnTi3 + CuTi相 + Cu3Ti相).随着Sn含量的增加,钎料显微硬度呈先增大后减小的趋势,钎料剪切强度呈逐渐减小的趋势,断口形貌由准解理断裂向解理断裂 + 准解理断裂的混合形态转变.增加Sn含量促使钎料形成粗化的CuSn3Ti5 相和共晶组织是导致钎料剪切强度下降的主要原因.
Abstract
In order to reveal the regulation of Sn on the mi-crostructure and mechanical properties of Cu-Sn-Ti brazing filler metal,Cu-xSnxTi10 brazing filler metals were prepared by vacuum non-self-consumption melting method,and the ef-fects of Sn on the microstructure,microhardness,shear strength and fracture morphology of Cu-Sn-Ti brazing filler metals were investigated by using scanning electron microscopy(SEM),X-ray diffractometer(XRD),energy spectrometer(EDS),and uni-versal material testing machine,etc.the results showed that:the microstructure evolution of the solder with the increase of Sn content was as follows:dendritic primary α-Cu matrix phase + eutectic tissue + intergranular tissue → primary α-Cu matrix phase + eutectic tissue → eutectic tissue → primary CuSn3Ti5 phase + coarsened eutectic tissue + α-Cu matrix phase(Sn-rich)+ Cu41Sn11 phase + SnTi3 phase,in which the intergranu-lar tissue was a mixed structure of α-Cu phase and CuSn3Ti5 phase + a small amount of SnTi3 + CuTi phase + Cu3Ti phase.With the increase of Sn content,the microhardness of filler metal increases first and then decreased,the shear strength of filler metal decreasing gradually,and the fracture morphology changed from the quasi-cleavage fracture to the mixture of cleavage fracture and quasi-cleavage fracture.The increase of Sn content promoted the formation of coarsened CuSn3Ti5 phase and eutectic tissue in the filler metal,which was the main reason for the decrease of shear strength of brazing metal.
关键词
Cu-Sn-Ti钎料/显微组织/剪切强度/显微硬度Key words
Cu-Sn-Ti brazing filler metal/microstructure/shear strength/microhardness引用本文复制引用
基金项目
河南省科技攻关计划项目(222102220114)
河南省科技攻关计划项目(232102220058)
河南省高等学校重点科研项目计划支持(24A460008)
出版年
2024
NETL
NSTL
万方数据