变形对奥氏体→铁素体相变影响的热力学数值模拟  

Thermodynamic Numerical Simulation of the Effect of Deformation on Austenite to Ferrite Transformation

作　　者：贠冰[1] 董小雷[2] 刘新忠[3] 张习加[2] 马志好[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]河北理工大学机械工程学院,唐山063009 [3]北京金自天正智能控制股份有限公司过程控制部,北京100070

出　　处：《机械工程材料》2010年第3期84-87,共4页Materials For Mechanical Engineering

基　　金：唐山市科技发展计划资助项目(07160202B-3)

摘　　要：根据热力学理论,借助Thermo-Calc软件,对不同成分钢材的变形奥氏体→铁素体相变进行了热力学数值分析,并在Gleeble 2000热模拟试验机上进行了压缩变形试验,将试验结果与模拟结果进行了对比。结果表明:变形使奥氏体→铁素体平衡转变温度升高,相变的驱动力增大,促进了转变的发生;变形使奥氏体相中碳含量上升;模拟结果与试验结果相符。According to thermodynamic theory, thermodynamic numerical analysis about the transformation of deformed austenite to ferrite of steels with different compositions was carried out by using the software Thermo- Calc. The compression tests were performed on thermal simulator Gleeble 2000 and the experimental results were compared with calculated results. The results show that the deformation could enhance the equilibrium transformation temperature of anstenite to ferrite, increase the transformation driving force, which accelerated the transformation. The deformation could also increase the carbon content in anstenite phase. The simulated results were in agreement with experimental ones.

关 键 词：变形 奥氏体 相变 热力学 

分 类 号：TG151.2[金属学及工艺—热处理]