7075铝合金厚板淬火温度场及热应力场的数值模拟  

Numerical analysis of temperature and thermal stresses fields in quenching 7075 aluminum alloy thick plates

作　　者：胡少虬[1] 张辉[1] 杨立斌[1] 林高用[1] 张颖[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：《湘潭大学自然科学学报》2004年第2期66-71,共6页Natural Science Journal of Xiangtan University

基　　金：国家重点基础研究发展规划 (973 )项目 (G19990 64 90 8)

摘　　要：根据在GLEEB 15 0 0热模拟试验机上实测的换热系数曲线 ,借助ANSYS有限元软件 ,对 70 75铝合金厚板在水中淬火过程中的温度场、热应力场进行了数值模拟 .结果表明 ,在 2 0℃、40℃和 80℃水淬火三个对比组中 ,在不考虑塑性变形的理想状态下 ,2 0℃水淬火试样的芯部温度最高 ,芯部和表面温差最大 ,热应力最高 ,40℃水淬火试样的芯部温度最低 ,芯部和表面温差最小 ,热应力最低 .We can analyze numerically all temperature and thermal stresses fields in the process of 7075 aluminum alloy thick plates quenching in water in virtue of the finite element program ANSYS, refer toconvection coefficient curves that come from isothermal compression test at Gleeble-1500 thermal-mechanical simulator. By Analyzing numerically without regard to deformation model, we make clear the difference of the effect of quenching medium water when water temperature is 20 ℃、40 ℃ and 80 ℃. The results indicate that we can get tiptop of temperature and the minimum thermal stresses fields and temperature difference from verge to body center, when water temperature is 40 ℃ and get neap of temperature and the maximum when water temperature is 20 ℃.

关 键 词：7075铝合金 淬火 温度场 热应力场 有限元分析 

分 类 号：TG156.3[金属学及工艺—热处理]