BCu93P及BCu91PAg钎料的热变形行为研究  

Research on thermal deformation behavior of BCu93P and BCu91PAg solder materials

作　　者：查心婧 王萍 黄世盛 王思鸿 王徐炳 刘薇[1] 沈杭燕[1] ZHA Xinjing;WANG Ping;HUANG Shisheng;WANG Sihong;WANG Xubing;LIU Wei;SHEN Hangyan(College of Materials and Chemistry,China Jiliang University,Hangzhou 310018,China;Hangzhou Huaguang Advanced Welding Materials Co.,Ltd.,Hangzhou 311112,China)

机构地区：[1]中国计量大学材料与化学学院,浙江杭州310018 [2]杭州华光焊接新材料股份有限公司,浙江杭州311112

出　　处：《中国计量大学学报》2024年第4期604-613,共10页Journal of China University of Metrology

基　　金：国家自然科学基金项目(No.51501174);浙江省基础工艺研究计划项目(No.LQ15A04001)。

摘　　要：目的:获得BCu93P和BCu91PAg两种钎料的最佳热加工工艺参数。方法:通过热拉伸实验研究钎料的热变形行为。基于动态材料模型和Prasad理论建立热加工图,并从微观角度分析热拉伸温度对材料性能的影响及两种钎料塑性、强度的差异。结果:两种钎料的流变应力随温度的升高而减小,随应变速率的增大而增大,BCu93P最佳热加工区域为325~375℃、0.001~00012 s^(-1),BCu91PAg最佳工艺参数范围为305~355℃,0.0009~0.001 s^(-1)。350℃时动态再结晶引起的丝材软化和拉伸变形导致的加工硬化相匹配,钎料塑性最佳。BCu91PAg中的富银相与Cu 3P相塑性不匹配,钎料断后伸长率小,但银添加具有固溶强化效果,使钎料抗拉强度增大。结论:两种钎料均属于正应变速率敏感材料.Aims:This paper aims to study the way to obtain the optimal hot working process parameters of BCu93P and BCu91PAg brazing materials.Methods:The thermal deformation behavior of brazing materials was studied through hot stretching experiments.Based on the dynamic material model and Prasad theory,a hot working diagram was established;and the influence of hot stretching temperature on material properties and the difference in plasticity and strength between the two brazing materials were analyzed from a microscopic perspective.Results:The rheological stress of the two brazing materials decreased with the increasing temperature and increased with the increasing strain rate.The optimal hot working area for BCu93P was 325~375℃,0.001~00012 s^(-1).The optimal process parameter range for BCu91PAg was 305~355℃,0.0009~0.001 s^(-1).The wire softening caused by dynamic recrystallization at 350℃matched the work hardening caused by tensile deformation;and the plasticity of the brazing material was the best.The rich silver phase in BCu91PAg did not match the plasticity of the Cu3P phase,resulting in a low elongation after the fracture of the brazing material.However,the addition of silver had a solid solution strengthening effect,which increased the tensile strength of the brazing material.Conclusions:Two brazing materials are normal strain rate sensitive materials.

关 键 词：铜磷钎料 热变形 热加工图 显微结构 

分 类 号：TG156.1[金属学及工艺—热处理]