不锈钢热变形流动应力数学模型  

Flow Stress Mathematical Models of Stainless at Hot Deformation

作　　者：樊百林[1] 严国安[2] 管克智[1] 刘临[3] 黄永健[2] 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]石家庄钢铁股份有限公司,石家庄050031 [3]北京科技大学开发总公司

出　　处：《北京科技大学学报》2002年第3期280-283,共4页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助课题(No.69772014)

摘　　要：采用恒变形率凸轮压缩试验机对不锈钢０Ｃｒ１３热变形流动应力进行了试验研究，分 析了变形温度、变形速率、变形程度对流动应力的影响，同时对不同的数学模型结构形式进行 了非线性回归，提出了２个非线性流动应力数学模型．分温度段回归数学模型与试验数据具有 较高的拟合精度，全温度段回归的数学模型便于计算机控制在线生产．Flow stress curves of stainless 0Cr13 were experimentally studied with a cam plastometer at a constant deformed speed. The effects of the deformed temperature, deformed rate and deformed degree on flow stress were analyzed. At the same time, two non-linear regression mathematical models were proposed. The discrete temperature model fit accurately with the experimental data, and the entire temperature model is useful in the computer control of on-line process.

关 键 词：热变形 不锈钢 流动应力 数学模型 凸轮试验机 变形温度 变形速率 变形程度 压力加工性能 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG113.253[金属学及工艺—金属材料]