BFe10-1-1铜合金热力学行为  

Thermodynamic Deformation Behavior of BFe10-1-1 Copper Alloy

作　　者：李宁[1,2] 陈志宝[1] 刘建波[2] 

机构地区：[1]江西省科学院江西省铜钨新材料重点实验室,江西南昌330029 [2]南昌航空大学航空制造工程学院,江西南昌330069

出　　处：《热加工工艺》2017年第4期114-116,119,共4页Hot Working Technology

摘　　要：以BFe10-1-1铜合金为研究对象,分别在850、900、950℃下,应变速率为0.01、0.1、1、10 s-1,真应变0.8的热压缩参数条件下,采用Gleeble-3500试验机完成热压缩试验,获得该合金的真应力-真应变曲线。结果表明,该合金在850、900℃成形时,对成形速度较敏感,即随应变速率的降低,流变应力随着减小;当温度在950℃时,合金的成形速度敏感性较差。在应变速率为0.01、0.1 s-1时,合金的流变应力随应变速率的提高而增大的效果不明显;在应变速率为1、10 s-1时,合金的流变应力基本不随应变速率的增大而提高。求得热变形激活能,并构建了该合金修正型的Arrhenius本构方程。Taking BFe10-1-1 copper alloy as research object, the flow stress behavior of BFe10-1-1 copper alloy under hot compression deformation, at 850 ℃, 900 ℃and 950℃, strain rate of 0.01, 0.1 s^-1, 1 s^-1, and 10 s-1and true strain of 0.8 was investigated by compression tests on Gleeble-3500 machine. The results show that the alloy is sensitive for forming speed,when forming at 800 ℃ and 900 ℃, namely, the flow stress decreases with the strain rate decreasing. While forming at 950℃, the alloy＇s forming speed sensitivity becomes poor. Its flow stress does not increase obviously with the strain rate increasing, when forming at the strain rate of 0.01 s^-1and 0.1 s^-1. And the flow stress almost has no increase with the increase of strain rate, when forming at strain rate of 1 s^-1and 10 s^-1. The hot deformation activation energy was evaluated. And the modified Arrhenius constitutive equation of BFe10-1-1 copper was obtained.

关 键 词：铁白铜 BFE10-1-1 热压缩 本构方程 

分 类 号：TG113.25[金属学及工艺—物理冶金] TG146.11[金属学及工艺—金属学]