Elevated Temperature Deformation Behavior of Nb Microalloyed 9310 Steel
-
摘要: 采用Gleeble-3800型热模拟试验机在温度1 173~1 473 K、应变速率0.01~10 s-1的条件下, 对镍微合金化9310钢的高温热变形前行为进行了研究, 得到了试验钢的高温流变曲线, 并用光学显微镜观察了试验钢变形前后的显微组织。结果表明: 镍微合金化9310钢的流变应力和峰值应变随着变形温度的升高和应变速率的降低而减小; 试验钢在真应变为0.9, 应变速率为0.01～10 s-1的条件下, 随着应变速率的提高, 其发生完全动态再结晶的温度也逐渐升高; 测得试验钢的热变形激活能Q值为362.649 kJ·mol-1, 并建立了其热变形方程以及动态再结晶条件下峰值应变σp与Zener-Hollomon因子的关系式。Abstract: The hot compression deformation behavior of Nb microalloyed 9310 steel was investigated using Gleeble-3800 simulator in the temperature range of 1 173-1 473 K with the strain rate of 0.01-10 s-1 to get the flow curves of test steel. And the microstructure of hot deformed test steel was observed using optical microscopy. The results show that the flow stress and peak strain of Nb microalloyed 9310 steel increased with the increase of strain rate and the decrease of deformation temperature. When the true strain was 0.9 and the range of strain rate was at 0.01-10 s-1, the temperature for full dynamic recrystallization increased with raising the strain rate. The hot deformation activation energy Q of Nb microalloyed 9310 steel was 362.649 kJ·mol-1. The hot deformation equation and the relationship between the peak strain σp and Zener-Hollomon parameter were obtained.
-
-
[1] 周凤云, 李熙章.高强度渗碳钢制构件的断裂分析[J].理化检验-物理分册, 2003, 39(4): 206-209. [2] 刘安武, 厉勇, 王春旭, 等.SAE9310钢热变形行为的研究[J].钢铁, 2009, 44(10): 82-86. [3] 吴秋平, 王春旭, 刘宪民, 等.回火温度对9310钢力学性能及组织的影响[J].热加工工艺, 2012, 41(6): 179-183. [4] 黄顺喆, 厉勇, 王春旭, 等.9310钢的奥氏体晶粒长大规律研究[J].热加工工艺, 2010, 39(18): 31-33. [5] 厉勇, 王春旭, 刘宪民, 等.SAE9310钢奥氏体的冷却转变行为[J].机械工程材料, 2010, 34(5): 12-15. [6] SELLARS C M.Recrystallization of metals[J].Metals Forum, 1981, 4(1/2): 75-80. [7] FARAG M M, SELLARS C M. Flow stress in hot extrusion of commercial-purity aluminum[J].Journal of the Institute of Metals, 1973, 101(5): 137-145. [8] JONAS J J, SELLARS C M, TEGART W J. Strength and structure under hot working conditions[J].Int Met Rev, 1969, 130(14): 1-24. [9] MEDINA S F, HERNANDEZ C A. General expression of Zener-Hollomon parameter as a function of the chemical composition of low alloy and microally steels[J].Acta Materialia, 1996, 44(1): 137-148. [10] 张斌, 张鸿冰.20crMnTi结构钢热变形行为及其数学模型[J].上海交通大学学报, 2003, 37(12): 1826-1830.
计量
- 文章访问数: 2
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
