C194铜合金热压缩变形流变应力  

Rheologic Stress of C194 Copper Alloy Under Hot Compression Deformation

作　　者：张红钢[1] 张辉[1] 刘婉容 林启权[1] 林高用[1] 彭大署 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]铜陵有色金属集团公司,安徽铜陵244001

出　　处：《湘潭大学自然科学学报》2003年第3期82-86,共5页Natural Science Journal of Xiangtan University

基　　金：中南大学高新张铜技术研究开发中心开发课题(ZT03-1)

摘　　要：在Gleeble-1500热模拟机上对C194铜合金在应变速率为0.01～10s^(-1)、变形温度为650～850℃条件下的流变应力行为进行了研究.结果表明:在实验范围内,C194铜合金热压缩变形时发生明显的动态再结晶;用Zener-Hollomon参数的指数函数形式能较好的描述C194铜合金高温变形时的流变应力行为;所获得的应变速率ε解析表达式中,参数A和β值分别为6.35×10~9 s^(-1)和0.119 MPa^(-1);其热变形激活能Q为316.11 kJ/mol.The rheologic stress of C194 copper alloy was investigated in the temperature range from 650℃ to 850℃ and at strain rale range from 0.01s -1 to 10 s-1 on Gleeble - 1500 test machine.The experimental results show that dynamic recryslallization occurs in evidence during hot compression deformation of C194 copper alloy in the range of experiments. The rheologic stress of C194 copper alloy during high temperature can be represented by a Zener- Hollomon parameter in the exponent - type equation. A and B in the analytical expressions of e fit to be 6.35 ×109s-1,0.119 MPa-respectively. The hot deformation activation energy of C194 copper alloy during hot deformation is 316.11 kJ/mol.

关 键 词：C194铜合金 热压缩变形 流变应力 Zener—Hollomon参数 热变形激活能 

分 类 号：TG156[金属学及工艺—热处理]