一种含Ti奥氏体不锈钢的热变形行为  

Hot Deformation Behaviour of a New Austenitic Stainless Steel Containing Ti

作　　者：王明家[1] 王艳[1] 熊良银[1] 蔡大勇[1] 王青峰[1,2] 

机构地区：[1]河北省亚稳材料制备技术与科学重点试验室,燕山大学材料学院,河北秦皇岛066004 [2]燕山大学-美国DSI公司物理模拟联合实验室

出　　处：《有色金属》2005年第2期25-28,38,共5页Nonferrous Metals

基　　金：国家自然科学基金资助项目(50435010)

摘　　要：采用Gleeble3500热模拟机研究一种含Ti奥氏体不锈钢在温度850～1250℃、应变速率0.01～10s-1条件下的热变形行为。确定其热变形方程为ε=6.516×1015[sinh(α·σ)]4.33exp(-453000/RT),由计算得到的能量消耗效率η建立了热加工图,该奥氏体不锈钢的热变形激活能为453kJ/mol,不同真应变下的热加工图相似,随着变形温度的升高及应变速率的降低,能量消耗效率η逐渐升高。The hot deformation behavior of an austenitic stainless steel containing Ti is investigated by the use of Gleeble-3500 simulator in the temperature range 850～1250℃ and strain rate of 0.01～10s -1. The hot deformation equation of this material is given to characterized the dependence of peak stress on the temperature and strain rate as ε=6.516×10 15[sinh(α·σ)] 4.33exp(-453000/RT). The processing maps are established and interpreted based on the calculation of power dissipation efficiency. The apparent activation energy is about 453kJ/mole. The maps obtained at true strains range from 0.1 to 0.7 are essentially similar, and efficiency of power dissipation is gradually increased with the increase of temperature and decrease of strain rate.

关 键 词：奥氏体不锈钢 热变形行为 TI 热变形激活能 应变速率 能量消耗 热模拟机 变形方程 变形温度 加工图 mol 真应变 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TQ323.4[金属学及工艺—金属材料]