Au-Cu-Pt-Ag合金带材组织和性能的研究  

Study on the microstructure and properties of Au-Cu-Pt-Ag alloy strip

作　　者：刘开强 沈大吉 马小龙 马晓东 何兴群 LIU Kaiqiang;SHENG Daji;MA Xiaolong;MA Xiaodong;HE Xingqun(Xi'an Noble Rare Metal Matrials Co.,Ltd.,Xi'an 710201,Shaanxi,China)

机构地区：[1]西安诺博尔稀贵金属材料股份有限公司,陕西西安710201

出　　处：《金属加工（热加工）》2024年第11期92-96,共5页MW Metal Forming

基　　金：西安市科技计划项目(2022JH-JSGGJQ-0018)。

摘　　要：使用真空感应熔炼制备Au-Cu-Pt-Ag母合金,然后使用冷轧制备了Au-Cu-Pt-Ag合金带材。研究了30%~70%加工率和300~700℃热处理后合金带材的显微组织和力学性能。随着冷加工率由30%增加至70%,合金硬度由257HV增加至282HV。当加工率为70%时,硬度达最大值282HV。当热处理温度为600℃以上时,合金发生完全再结晶,形成均匀的等轴晶组织,合金硬度显著降低。在300℃进行0.5h、1h、2h、4h的时效处理,合金相发生有序转变,晶胞体积收缩,晶界逐渐粗化;随着时效时间由0.5h延长至4h,合金硬度先升高后降低,在2h时硬度最大值为323HV。In this work,Au-Cu-Pt-Ag master alloy were prepared by vacuum induction melting and then the alloy strips were prepared by cold rolling.The microstructure and mechanical properties of Au-Cu-Pt-Ag alloy strips with a processing rate of 30%~70%and heat treatment at 300~700℃were studied.As the cold working rate incresses from 30%to 70%,the alloy hardness increases from 257HV to 282HV.When the processing rate was 70%,the hardness reaches the maximum balue of 282HV.When the heat treatment temperature was above 600℃,the alloy undergoes complete recrystallization,forming uniform equiaxed crystal structure,and significantly reducing the hardness of the alloy.Aging treatment at 300℃for 0.5h,1h,2h and 4h resulted in ordered transformation within the alloy phases,shrinkage of grain cell volume,and gradual coarsening of grain boundaries;As the aging time increases from 0.5 hours to 4 hours,the hardness of the alloy first increases and then decreases,the maximum hardness was 323HV at 2 hours.

关 键 词：Au-Cu-Pt-Ag合金 显微组织 硬度 热处理 

分 类 号：TG146.31[一般工业技术—材料科学与工程]