P含量对Cu-P-Sn-Ag四元合金钎料组织及力学性能的影响  

Effect of P Content on the Microstructure and Mechanical Properties of Cu-P-Sn-Ag Quaternary Alloy Solder

作　　者：李航 张淑婷 唐卫岗 欧阳佩旋 罗良良 文艺 LI Hang;ZHANG Shuting;TANG Weigang;OUYANG Peixuan;LUO Liangliang;WEN Yi(School of Mechanical and Materials Engineering,Northern University of Technology,Beijing 100144,China;Hangzhou Huaguang Welding New Materials Co.,Ltd.,Hangzhou 311107,China)

机构地区：[1]北方工业大学机械与材料工程学院,北京100144 [2]杭州华光焊接新材料股份有限公司,杭州311107

出　　处：《有色金属工程》2023年第10期22-29,共8页Nonferrous Metals Engineering

基　　金：北京市自然科学基金-市教委联合项目(KZ201910009010);北方工业大学高层次人才科研启动项目(XN277,110051360002);毓杰团队项目(XN212/009)。

摘　　要：Cu-P-Sn-Ag四元合金钎料在工业生产过程中易出现丝材脆性断裂现象,严重影响产品质量,为了改善其力学性能,制备了不同P含量的Cu-P-Sn-Ag四元合金铸锭及钎料,系统研究了P含量对钎料微观组织、硬度、抗拉强度及延伸率的影响。结果表明,当P含量为5.0%~5.2%时,合金中脆性相Cu 3P组织均为细小短棒状,晶粒尺寸小于5μm。当P含量为5.4%~6.0%时,合金中部分Cu 3P组织逐渐转变为粗大鱼骨状,晶粒尺寸大于30μm。当P含量为5.2%~5.4%时,随着P含量的增大,钎料硬度显著增大,从247.7 HV增大到260.4 HV;其抗拉强度和延伸率显著降低,分别从844.38 MPa和3.60%降低到815.08 MPa和3.07%。P含量与微观组织的演变关系被认为是影响钎料力学性能的主要原因。Cu-P-Sn-Ag quaternary alloy brazing material is prone to brittle fracture of wire during industrial production,which seriously affects product quality.To improve its mechanical properties,Cu-P-Sn-Ag quaternary alloy ingots and brazing materials with different P contents were prepared.The effects of P content on the microstructure,hardness,tensile strength,and elongation of the brazing material were systematically studied.The results show that when the P content is between 5.0%and 5.2%,the brittle phase Cu 3P structure in the alloy is small and short rod-shaped,with grain size less than 5μm.When the P content is between 5.4%and 6.0%,some Cu 3P structures in the alloy gradually transform into coarse fishbone like structures,with grain sizes greater than 30μm.When the P content ranges from 5.2%to 5.4%,the hardness of the solder increases significantly with the increase of P content,from 247.7 HV to 260.4 HV;Its tensile strength and elongation significantly decreased from 844.38 MPa and 3.60%to 815.08 MPa and 3.07%,respectively.The evolution relationship between P content and microstructure is the main factor affecting the mechanical properties of brazing materials.

关 键 词：Cu-P-Sn-Ag四元合金 P含量 微观组织 硬度 抗拉强度 

分 类 号：TG44[金属学及工艺—焊接]