| 基于元胞自动机的30CrMo钢动态再结晶组织演变规律研究 |
| |
| 作者姓名： | 费荣高 赵刚 叶传龙 韩汝洋 易航 甘晓龙 |
| |
| 作者单位： | 武汉科技大学材料与冶金学院,湖北 武汉,430081;武汉科技大学钢铁冶金新工艺湖北省重点实验室, 湖北 武汉,430081,武汉科技大学材料与冶金学院,湖北 武汉,430081;武汉科技大学钢铁冶金新工艺湖北省重点实验室, 湖北 武汉,430081,武汉科技大学材料与冶金学院,湖北 武汉,430081;武汉科技大学钢铁冶金新工艺湖北省重点实验室, 湖北 武汉,430081,武汉科技大学材料与冶金学院,湖北 武汉,430081;武汉科技大学钢铁冶金新工艺湖北省重点实验室, 湖北 武汉,430081,武汉科技大学材料与冶金学院,湖北 武汉,430081;武汉科技大学钢铁冶金新工艺湖北省重点实验室, 湖北 武汉,430081,宝钢股份中央研究院武汉分院,湖北 武汉,430080 |
| |
| 基金项目： | 国家自然科学基金资助项目(51774219). |
| |
| 摘 要： | 根据30CrMo钢的热模拟实验数据,建立了基于动态再结晶物理机制的位错密度、形核率及晶粒长大模型,并采用元胞自动机(CA)方法模拟了30CrMo钢在不同温度及应变速率下的微观组织演变规律。结果显示,通过CA方法模拟得到30CrMo钢的流变应力曲线及平均晶粒尺寸均与实验值吻合较好,所建模型的有效性和准确性得到验证。当应变速率一定时,变形温度越高越利于动态再结晶的充分进行,稳态下晶粒尺寸相对较大;而当变形温度一定时,高应变速率条件下材料的形核率较大,再结晶晶粒较细小。
|
| 关 键 词： | 30CrMo钢 元胞自动机 动态再结晶 组织演变 应力-应变 |
| 收稿时间： | 2019/4/12 0:00:00 |
Study of microstructural evolution of 30CrMo steel during dynamic recrystallization based on cellular automata |
| |
| Authors: | Fei Ronggao Zhao Gang Ye Chuanlong Han Ruyang Yi Hang and Gan Xiaolong |
| |
| Institution: | College of Material Science and Metallurgical Engineering, Wuhan University of Science and Technology,Wuhan 430081, China;Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology, Wuhan 430081, China,College of Material Science and Metallurgical Engineering, Wuhan University of Science and Technology,Wuhan 430081, China;Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology, Wuhan 430081, China,College of Material Science and Metallurgical Engineering, Wuhan University of Science and Technology,Wuhan 430081, China;Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology, Wuhan 430081, China,College of Material Science and Metallurgical Engineering, Wuhan University of Science and Technology,Wuhan 430081, China;Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology, Wuhan 430081, China,College of Material Science and Metallurgical Engineering, Wuhan University of Science and Technology,Wuhan 430081, China;Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology, Wuhan 430081, China and Wuhan Branch of Baosteel Central Research Institute, Wuhan 430080, China |
| |
| Abstract: | The models of dislocation density, nucleation rate and grain growth based on the physical mechanism of dynamic recrystallization were established by employing the thermal simulation results of 30CrMo steel. Aided by cellular automata (CA) approach, the microstructural evolution of 30CrMo steel under different deformation temperatures and strain rates was investigated simulatedly. The results show that the flow stress curves and average grain sizes obtained by CA method are in good agreement with the experimental data, and the validity and accuracy of the established model are therefore verified. Besides, when the strain rate is constant, with the increase of deformation temprature, the degree of dynamic recrystallizition is more sufficient, along with the increase of grain size; when the deformation temperature is constant, high strain rate is beneficial to the nucleation of dynamic recrystallization, which leads to the refinement of grain. |
| |
| Keywords: | 30CrMo steel cellular automata dynamic recrystallization microstructural evolution stress-strain |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
|
