为了研究Fe-C-Mn-A1系TRIP钢两相区奥氏体化过程中合金元素在奥氏体和铁素体中的分布,利用热膨胀仪、金相显微镜、电子探针等仪器,在对TRIP钢两相区奥氏体化过程进行热力学与动力学分析的基础上,建立了两相区奥氏体化过程的扩散模型,采用显式有限体积法对800℃与840℃的奥氏体化过程进行了数值求解.模拟结果表明:奥氏体转变初期受C元素在奥氏体中的扩散控制达到亚平衡,奥氏体转变速率较快；此时A1元素在奥氏体与铁素体界面处的浓度差较显著,Mn元素在奥氏体与铁素体界面处的浓度差不显著.奥氏体转变后期受Mn元素在铁素体内的扩散控制,转变速率较慢；此时A1元素在铁素体内已大量富集,Mn元素在奥氏体与铁索体界面处有较显著的浓度差.
参考文献
| [1] | Jacques P J;Girault E;Mertens A et al.The Developments of Cold-Rolled TRIP-Assisted Multiphase Steels:A1-AlloyedTRIP-Assisted Multiphase Steels[J].ISIJ International,2001,41(09):1068. |
| [2] | P. J. JACQUES;E. GIRAULT;Ph. HARLET .The Developments of Cold-rolled TRIP-assisted Multiphase Steels. Low Silicon TRIP-assisted Multiphase Steels[J].ISIJ International,2001(9):1061-1067. |
| [3] | M. De MEYER .The Influence of the Substitution of Si by Al on the Properties ofCold Rolled C-Mn-Si TRIP Steels[J].ISIJ International,1999(8):813-822. |
| [4] | Samajdar I.;Verlinden B.;Aernoudt E.;Van Humbeeck J.;Girault E. .Transformations during intercritical annealing of a TRIP-assisted steel[J].ISIJ International,1998(9):998-1006. |
| [5] | 史文,李麟,符仁钰.两相区退火对不同硅含量TRIP钢残留奥氏体和力学性能的影响[J].金属热处理,2003(03):10-14. |
| [6] | A.JACOT;M.RAPPAZ .A TWO-DIMENSIONAL DIFFUSION MODEL FOR THE PREDICTION OF PHASE TRANSFORMATIONS: APPLICATION TO AUSTENITIZATION AND HOMOGENIZATION OF HYPOEUTECTOID Fe-C STEELS[J].Acta materialia,1997(2):575-585. |
| [7] | A. JACOT;M. RAPPAZ .A COMBINED MODEL FOR THE DESCRIPTION OF AUSTENITIZATION, HOMOGENIZATION AND GRAIN GROWTH IN HYPOEUTECTOID Fe-C STEELS DURING HEATING[J].Acta materialia,1999(5):1645-1651. |
| [8] | Jacot A;Rappaz M;Reed R C .Modeling of Reaustenitization From The Pearlite Structure in Steel[J].Acta Materialia,1998,46(11):3949. |
| [9] | 邝霜,康永林,于浩,齐秀美,刘仁东.Fe-C-Mn系冷轧双相钢两相区奥氏体化过程模拟[J].北京科技大学学报,2008(08):858-863. |
| [10] | 张宇光,赵爱民,赵征志,张明明,唐获,李本海.冷轧TRIP钢两相区奥氏体化中合金元素的扩散[J].沈阳工业大学学报,2011(01):62-67. |
| [11] | Speich G R;Demarest V A;Miller R L .Formation of Austenite During Intercritical Annealing of Dual-Phase Steels[J].Metallurgical and Materials Transactions,1981,12A(08):1419. |
| [12] | 余永宁.金属学原理[M].北京:冶金工业出版社,2000 |
| [13] | 蒙继龙;李友麟;魏兴钊 等.渗铝时钢中铝的传递[J].金属热处理学报,1989,10(01):84. |
| [14] | Purdy G R;Embury J D;Wycliffe P A .Growth of Austenite in the Intercritical Annealing of Fe-C-Mn Dual-Phase Steels[J].Canadian Metallurgical Quarterly,1981,20(03):339. |
| [15] | 石霖.合金热力学[M].北京:机械工业出版社,1992 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%