第14卷第4期2023年8月有色金属科学与工程NonferrousMetalsScienceandEngineeringVol.14，No.4Aug.2023SnBi36Ag0.5Sbx焊料合金组织与性能*朱文嘉，赵中梅，龙登成，张欣，秦俊虎*，卢红波（云南锡业新材料有限公司，昆明650501）摘要：向SnBi36Ag0.5合金中加入不同含量的Sb元素，按设计的质量比将Sn、Bi、Ag、Sb纯金属在450℃熔化，保温6h、320℃浇铸，制备成SnBi36Ag0.5Sbx（x=0.3、0.7、1.0、1.5、2.0）焊料合金。并对合金的显微组织、相成分、熔点、润湿性、力学性能进行表征，研究Sb含量对合金性能的影响。结果表明该合金由网状Bi相、基体Sn相、颗粒状和短杆状的富Bi相、Ag3Sn构成。在一定范围内，Sb元素绝大部分固溶于Sn基体相中，难以析出SnSb化合物。Sb的添加使合金的液相线温度和熔程明显提高。随着Sb含量增高，润湿时间越长，润湿力越低，润湿性能下降。当Sb含量为2%时，抗拉强度最高值为97.09MPa。添加少量的Sb对Sn-Bi系中Bi合金焊料性能产生明显影响。关键词：SnBi36Ag0.5Sbx焊料合金；显微组织；润湿性；力学性能中图分类号：TG425文献标志码：AStudyonmicrostructureandpropertiesofSnBi36Ag0.5SbxsolderalloyZHUWenjia,ZHAOZhongmei,LONGDengcheng,ZHANGXin,QINJunhu*,LUHongbo（YunnanTinNewMaterialCo.，Ltd.，Kunming650501，China）Abstract:SnBi36Ag0.5Sbx(x=0.3,0.7,1.0,1.5and2.0)solderalloywaspreparedbymeltingpureSn,Bi,Ag,Sbat450℃for6handthencastingat320℃accordingtothemassratio.Themicrostructure,phasecomposition,meltingpoint,wettability,andmechanicalpropertiesofthealloywerecharacterizedtostudytheeffectofSbcontentonthepropertiesofthealloy.TheresultsshowedthatthealloywascomposedofreticulatedBiphase,matrixphaseofSn,granularandshortrod-shapedBi-richphase,andAg3Sncompound.Inacertainrange,mostSbelementssolutionizedinthematrixphaseofSnratherthanastheSnSbcompoundliberation.TheliquidustemperatureandmeltingrangeofthealloywereincreasedbytheadditionofSb.WithincreasingSbcontent,thewettabilitydecreasedduetotheworsewettingtimeandthewettingforce.WhentheSbcontentwas2%,themaximumtensilestrengthwas97.09MPa.TheadditionofasmallamountofSbcansignificantlyaffectthepropertiesoftheBialloysolderintheSn-Bisystem.Keywords:SnBi36Ag0.5Sbxsolderalloy；microstructure；wett...
