低银无铅钎料的拉伸力学性能  

Tensile properties of low silver lead-free solders

作　　者：王春艳[1] 张宇鹏[2] 许磊[2] 

机构地区：[1]广州科技贸易职业学院机电系,广东广州511442 [2]广州有色金属研究院焊接技术研究所,广东广州510650

出　　处：《材料热处理学报》2015年第1期27-30,共4页Transactions of Materials and Heat Treatment

基　　金：广州市珠江科技新星专项(2013J2200033)

摘　　要：对比研究了SAC305、SAC0307、SAC0307X共3种无铅钎料在不同环境温度和加载速率下的力学性能。结果表明,合金元素Ni、P等的添加能有效改善低Ag钎料的拉伸力学性能,但对钎料韧性提高有限;低Ag钎料SAC0307在55℃下的强度和韧性均低于SAC305钎料,而在85℃其韧性优于SAC305钎料。在55℃和85℃条件下,钎料合金拉伸力学性能均显著下降,在加载速率20 mm/min和55℃条件下,SAC305综合力学性能更有优势;而在85℃,低Ag无铅钎料SAC0307具备优势,因此低银无铅钎料应用需要进一步改善其在40~60℃范围的综合力学性能。Mechanical properties of the lead-free solder alloys( SAC305,SAC0307,SAC0307X) at different temperatures and loading speeds were studied by tensile tests. It is shown that the tensile strength of the low-silver solder alloys can be improved by the addition of P and Ni elements,however the ductility of the alloys can not be improved by these additions; comparing with the measured property values of SAC305 alloy,the tensile strength and the toughness of the SAC0307 alloy are worse at 55 ℃,but better at 85 ℃,respectively. The mechanical properties of all solder alloys become worse at 55 ℃ and 85 ℃. But the tensile property of the SAC305 alloy is better than that of the SAC0307 at of 55 ℃ and low loading speed( 20 mm / min). An opposite trend can be found at 85 ℃ and 20 mm / min. Therefore the mechanical properties of the low silver alloy at 40-60 ℃ can be further improved in applications.

关 键 词：低银钎料 加载速度 拉伸性能 无铅 伸长率 

分 类 号：TG425[金属学及工艺—焊接]