通过对低碳钢Q235的单向压缩实验,研究了应变、应变速率和变形温度(高于奥氏体铁索体平衡转变温度Ae3)对形变诱导铁素体相变的影响.通过光学显微镜、扫描电子显微镜和X射线衍射仪研究了热变形试样的微观组织结构,利用纳米压痕仪测定了形变诱导铁索体和先共析铁素体的纳米压痕硬度和弹性模量.结果表明,形变诱导铁素体相变可以在Ae3温度之上发生且应变速率和应变越大,相变越容易.在名义应变ε=80%,应变速率ε=20 s-1的条件下形变诱导铁素体相变上限温度为945℃(Ae3+98℃).同时发现一个有趣的现象是,在870-920℃区间内变形时,随变形温度下降,应力上升;而在830-870℃区间变形时,随变形温度的下降,整体应力反而下降.与先共析铁素体X射线衍射峰比较,形变诱导铁素体X射线衍射峰明显向小角度方向漂移,形变诱导铁素体的纳米压痕硬度和弹性模量亦明显大于先共析铁素体.实验表明,这种形变诱导铁素体本质上是一种马氏体.
参考文献
| [1] | Priestner R, Hodgson P D. Mater Sci Technol, 1992; 8:849 |
| [2] | Huang Y D, Yang W Y, Sun Z Q. J Mater Proc Technol,2003; 134:19 |
| [3] | Hodgson P D, Hickson M R, Gibbs R K. Scr Mater, 1999;40:1179 |
| [4] | Hurley P J, Hodgson P D, Muddle B C. Scr Mater, 1999;40:433 |
| [5] | Hurley P J, Hodgson P D. Mater Sci Technol, 2001; 17:1360 |
| [6] | Hickson M R , Hodgson P D. Mater Sci Technol, 1999;15:85 |
| [7] | Yang P, Fu Y Y, Cui F E, Sun Z Q. Acta Metall Sin, 2001;37:900(杨平,傅云义,崔凤娥,孙祖庆.金属学报,2001;37:900) |
| [8] | Qi J J, Yang W Y, Sun Z Q. Acta Metall Sin, 2002; 38:629(齐俊杰,杨王玥,孙祖庆.金属学报,2002;38:629) |
| [9] | Hickson M R, Gibbs R K, Hodgson P D. ISIJ Int, 1999;39:1176 |
| [10] | Yada H, Matsumura Y. Trans Iron Steel Inst Jpn, 1987;27:492 |
| [11] | Matsumura Y, Yada H. Metall Soc Technol Paper, 1986;A86-28:1 |
| [12] | Yada H, Li C M, Yamagata H. ISIJ Int, 2000; 40:200 |
| [13] | Mintz B, Lewis J, Jonas J J. Mater Sci Technol, 1997; 13:379 |
| [14] | Hurley P J, Hodgson P D. Mater Sci Eng, 2001; 302A:206 |
| [15] | Bleck W, Herzig C, Lorenz U. Mater Technol, 2001; 72:406 |
| [16] | Yang Z M, Wang R Z. ISIJ Int, 2003; 43:761 |
| [17] | Tong M M, Ni J, Zhang Y T, Li D Z, Li Y Y. Scr Mater,2004; 50:909 |
| [18] | Priestner R, Al-Horr Y M, Ibraheem A K. Mater Sci Technol, 2002;18:973 |
| [19] | Yang Z M, Zhao Y, Wang R Z, MA Y W, Che Y M. Acta Metall Sin, 2000; 36:818(杨忠民,赵燕,王瑞珍,马燕文,车彦民.金属学报,2000;36:818) |
| [20] | Yang Z M, Zhao Y, Wang R Z, Ma Y W, Che Y M, Chen Q A. Acta Metall Sin, 2000; 36:1061(杨忠民,赵燕,王瑞珍,马燕文,车彦民,陈其安.金属学报,2000;36:1061) |
| [21] | Liu Z X, Tong M M, Huang C J, Li D Z. Acta Metall Sin,2004; 40:930(刘朝霞,佟铭明,黄成江,李殿中.金属学报,2004;40:930) |
| [22] | Li W J, Du L X, Zhang H M, Liu X H, Wang G D. J Iron Steel Res, 2000; 12:36(李维娟,杜林秀,张红梅,刘相华,王国栋.钢铁研究学报,2000;12:36) |
| [23] | Amin R K, Pickering F B. Thermomechanical processing of microalloyed austenite, Warrendale, PA: TMS, 1982:377 |
| [24] | Dube A, Aranson H I, Mehl R F. Rev Met, 1958; 55:201 |
| [25] | Massalski T B. Acta Metall, 1958; 6:243 |
| [26] | Xu Z Y. Heat Treatment, 2003; 18: 1(徐祖耀.热处理,2003;18:1) |
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%