T122耐热钢热变形加工图及热成形性  

Processing maps and hot formability of T122 heat resistant steel

作　　者：曹金荣[1] 刘正东[2] 程世长[2] 杨钢[2] 谢建新[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]钢铁研究总院,北京100081

出　　处：《北京科技大学学报》2007年第12期1204-1208,共5页Journal of University of Science and Technology Beijing

基　　金：国家高技术研究发展计划资助项目(No.2003AA331060)

摘　　要：在Gleeble 3500热模拟试验机上进行热压缩实验、采用动态材料模型理论、双曲线本构方程及Liapunov稳定性判据，建立了T122耐热钢热变形加工图．利用所建立的加工图，分析了不同温度和应变速率下T122钢的热成形性及其与显微组织的关系、结果表明：T122钢在1085℃以上、应变速率小于0．37s^-1压缩变形时，功率耗散效率达到峰值0．2，此时发生了完全动态再结晶；对于工业热加工，建议在变形温度为1085～1150℃和应变速率大于0．13s^-1的范围内选择加工参数．Based on the dynamic materials model theories, hyperbolic sine equation and two Liapunov stability criteria, the processing maps of T122 heat resistant steel were constructed using the data obtained from isothermal hot compress tests by means of a Gleeble 3 500 simulator. The hot formability of the T122 steel was studied and its relations with microstructure at various temperatures and strain rates were analyzed using the process maps. The result shows that the efficiency of power dissipation increases with the increase in temperature and the decrease in strain rate, The T122 steel exhibited dynamic recrystallization with a peak power dissipation efficiency of 0.2 occurring at the temperature upwards 1085 ℃ and the strain rate less than 0.37 s^- 1 The temperature of 1085-- 1 150℃ and the strain rate more than 0.13 s^-1 are recommended to set the industrial forming conditions.

关 键 词：T122耐热钢 热压缩实验 加工图 成形性 

分 类 号：TG113.3[金属学及工艺—物理冶金]