基于过冷奥氏体动态相变的热轧TRIP钢组织控制 I．原始奥氏体晶粒尺寸
收稿日期: 2009-06-29
修回日期: 2009-10-16
网络出版日期: 2010-02-10
基金资助
国家高技术研究发展计划项目2007AA03Z501和高等学校博士学科点专项科研基金项目200800081014资助
MICROSTRUCTURE CONTROL OF HOT ROLLED TRIP STEEL BASED ON DYNAMIC TRANSFORMATION OF UNDERCOOLED AUSTENITE
I. Prior Austenite Grain Size
Received date: 2009-06-29
Revised date: 2009-10-16
Online published: 2010-02-10
Supported by
Supported by National High Technology Research and Development Program of China (No.2007AA03Z501) and Specialized Research Fund for the Doctoral Program of Higher Education (No.200800081014)
尹云洋 , 杨王玥 , 孙祖庆 , 王西涛 . 基于过冷奥氏体动态相变的热轧TRIP钢组织控制 I．原始奥氏体晶粒尺寸[J]. 金属学报, 2010 , 46(2) : 155 -160 . DOI: 10.3724/SP.J.1037.2009.00431
Low–alloy multiphase transformation–induced plasticity (TRIP) steels offer excellent mechanical properties combining high–strength levels with a well ductility. This results from the complex synergy between different phases, i.e., ferrite, baintie and retained austenite in them. An in–depth understanding of the novel hot rolled TRIP processing based on dynamic transformation of undercooled austenite (DTUA) is required to study the microstructure evolution under different treatment conditions. The parameters determining the stability of the metastable austenite and mechanical property of TRIP steel were revived and investigated experimentally, with a special attention paid to the effect of prior austenite grain size and cooling rate after DTUA on its microstructure and mechanical property. The results show that the kinetics of ferrite during DTUA is accelerated when the prior austenite grain size is small. In addition, reducing the grain size of austenite, the distribution of ferrite, bainite and retained austenite becomes more uniform. Moreover, the size of bainite packets and bainitic ferrite becomes smaller, the volume fraction and carbon content of retained austenite higher, and the finer granular retained austenite vast and distributed uniformly, which result in the investigated steel having a higher strength and ductility.
[1] Yin Y Y, Yang W Y, Li L F, Sun Z Q, Wang X T. Acta Metall Sin, 2008; 44: 86
(尹云洋, 杨王玥,李龙飞, 孙祖庆, 王西涛. 金属学报, 2008; 44: 686)
[2] Yin Y Y, Yang W Y, Li L F, Sun Z Q, Wang X T. Acta Metall Sin, 2008; 44: 1292
(尹云洋, 杨王玥, 李龙飞, 孙祖庆, 王西涛. 金属学报, 2008; 44: 1292)
[3] Yin Y Y, Yang W Y, Li L F, Sun Z Q, Wang X T. Acta Metall Sin, 2008; 44: 1299
(尹云洋, 杨王玥,李龙飞, 孙祖庆, 王西涛. 金属学报, 2008; 44: 1299)
[4] Yang W Y, Hu A M, Sun Z Q. Acta Metall Sin, 2000;36: 1055
(杨王玥,胡安民, 孙祖庆. 金属学报, 2000; 36: 1055)
[5] Heladi H, Kelly G L, Shokouhi A, Hodgson P D. Mater Sci Eng, 2004; A367: 152
[6] Heladi H, Kelly G L, Shokouhi A, Hodgson P D. Mater Sci Eng, 2004; A371: 343
[7] Dong H, Sun X J. Curr Opin Solid State & Mater Sci, 2005; 9: 269
[8] Yin Y Y, Yang W Y, Li L F, Sun Z Q, Wang X T. Acta Metall Sin, 2010; 46: 161
(尹云洋, 杨王玥,李龙飞, 孙祖庆, 王西涛. 金属学报, 2010; 46: 161) [9] Sun Z Q, Yang W Y, Qi J J, Hu A M. Mater Sci Eng, 2002; A334: 201
[10] Miller R L. Trans ASM, 1964; 57: 892
[11] Beladi H, Kelly G L, Shokouhi A, Hodgson P D. Mater Sci Eng, 2004; A367: 152
[12] Eghbali B, Abdollah–Zadeh A. Scr Mater, 2006; 54: 1205
[13] Ehrhardt B, Gerber T, Schaumann T W. In: Baker M A ed., Int Conf on Advanced High Strength Sheet for Automotive Applications Proceedings, Winter Park, Colorado, 2004: 47
[14] Nakagaito T, Shimizu T, Inazumi T, Hosoya Y, Furukimi O, Sakata K. In: Baker M A ed., Int Conf on Advanced High Strength Sheet for Automotive Applications Proceedings, Winter Park, Colorado, 2004: 231
[15] Haidemenopoulos G N, Grujicic M, Olson G B, Cohen M. J Alloys Compd, 1995; 220: 142
[16] Jacques P J, Furnemont Q, Lani F, Pardoen T, Delannay F. Acta Mater, 2007; 55: 3681
[17] Muransky O, Sittner P, Zrnik J, Oliver E C. Acta Mater, 2008; 6: 3367
[18] Tvergaard V. Int J Fract, 1982; 18: 237
[19] Olson G B. J Phys IV, 1996; 6: 407
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