BFe30-1-1铜合金热压缩流变应力行为  

Flow Stress Behaviors of BFe30-1-1 Copper Alloy During Hot Compression

作　　者：林高用[1] 周佳[1] 张振峰[1] 郑小燕[1] 蔡海[1] 张胜华[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《热加工工艺》2007年第13期9-12,共4页Hot Working Technology

基　　金：江苏省科技成果转化项目资助(苏科计DA2006034)

摘　　要：通过在Gleeble-1500动态热模拟机上进行高温等温压缩试验,研究了BFe30-1-1合金在高温塑性变形过程中的流变应力行为。试验温度为800～950℃,应变速率为0.1～20s-1。研究结果表明:BFe30-1-1合金的流变应力随变形温度的增加而减小,随应变速率的增大而增大;应变速率越大,流变应力下降越明显;获得了采用Zener-Hollomon参数来描述的BFe30-1-1合金高温变形的流变应力方程,计算获得该合金变形激活能Q为177.62kJ/mol。The flow stress behaviors of BFe30-1-1 copper alloy during plastic deformation at elevated temperature were studied by the isothermal compression test at Gleeble-1500 simulator. The compression test was performed in the temperature range from 800 ℃ to 950℃ and in the sWain rate range from 0.1s^-1 to 20 s^-1.The experimental results show that the flow stress of BFe30-1-1 alloy decreases with the increase of deformation temperature and enhances with the increase of the sWain rate. The flow stress equation of BFe30-1-1 alloy during high temperature deformation is obtained by Zener-Hollomon parameter, and the hot deforming activation energy Q of this alloy is calculated to be 177.62k J/tool.

关 键 词：BFe30-1-1合金 热压缩变形 流变应力 ZENER-HOLLOMON参数 

分 类 号：TG319[金属学及工艺—金属压力加工] TG146.11[一般工业技术—材料科学与工程]