无模拉拔工艺参数对Ag-28Cu-8Sn合金组织及性能的影响  

Effect of Process Parameters for Dieless Drawing on Microstructure and Properties of Ag-28Cu-8Sn Alloy

作　　者：方继恒 谢明[1] 陈永泰[1] 胡洁琼[1] 杨有才[1] 张吉明[1] 王松[1] 马宏伟 FANG Jiheng;XIE Ming;CHEN Yongtai;HU Jieqiong;YANG Youcai;ZHANG Jiming;WANG Song;MA Hongwei(Sate Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metal,Kunming Institute of Precious Metals,Kunming 650106,China)

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明650106

出　　处：《贵金属》2018年第A01期1-7,共7页Precious Metals

基　　金：国家重点研发计划(2017YFB0305700);国家自然科学基金项目(U1602275;U1602271;51707087);云南省重大科技专项(2018ZE011;2018ZE012;2018ZE022;2018ZE026);云南省应用基础研究计划项目(2018FB088;2017FB144)

摘　　要：采用连续铸造技术制备Ag-28Cu-8Sn合金棒材,通过无模拉拔工艺将合金棒材拉拔至目标丝径,分别探究加热温度和拉拔速度两种工艺参数对Ag-28Cu-8Sn合金组织、导电率、硬度、强度和延伸率性能的影响。结果表明,在相同拉拔速度和断面收缩率下,"吞并长大"现象导致横纵截面黑白两相的平均尺寸随着温度的增加而逐渐变大,同时导电率和延伸率随之增加,而强度和硬度减小;相同加热温度下,横纵截面合金相尺寸随着拉拔速度的升高而逐渐减小,硬度和强度随之增加,而延伸率和导电率随之减小。Ag-28Cu-8Sn alloy is a widely used brittle silver-based brazing filler metal.The wire of brazing filler metal prepared by continuous casting process and dieless drawing technology.The effects of two kinds of dieless drawing process parameters,heating temperature and drawing speed,on the microstructure,electrical conductivity,hardness,strength and elongation properties of Ag-28Cu-8Sn alloy were investigated.The results show that under the same drawing speed and reduction of the section,the phenomenon of“swallowing and growing up”causes the average size of the black and white phases of the horizontal and vertical sections to gradually increase with the increase of temperature,as well as the electrical conductivity and elongation accordingly,but the strength and hardness are reduced.Furthermore,based on the same heating temperature,the alloy phase size of the transverse and longitudinal sections gradually decreases with the increase of the drawing speed,and the hardness and strength increase,while the elongation and electrical conductivity decrease.

关 键 词：金属材料 难加工 无模拉拔 组织形貌 性能 

分 类 号：TB311[一般工业技术—材料科学与工程] TG146.32[金属学及工艺—金属材料]