|
|||||
|
|
| 不同加热轧制AZ91镁合金带材数值模拟及试验验证 | |
| 引用本文： | 梅瑞斌,史现利,包立,张碧辉,侯俊卿,李长生.不同加热轧制AZ91镁合金带材数值模拟及试验验证[J].中国冶金,2022,32(1):112-120. |
| 作者姓名： | 梅瑞斌 史现利 包立 张碧辉 侯俊卿 李长生 |
| 作者单位： | 1.东北大学轧制技术及连轧自动化国家重点实验室, 辽宁 沈阳 110819; 2.东北大学秦皇岛分校资源与材料学院, 河北 秦皇岛 066004; 3.中冶沈勘秦皇岛工程设计研究总院有限公司钢铁研究院, 河北 秦皇岛 066010 |
| 基金项目： | 河北省自然科学基金钢铁联合基金资助项目(E2018501016); 河北省教育厅教改项目(2017CXCY141: GJXH2019-062) |
| 摘 要： | 利用有限元法研究了热辊热带(HSR-HR)、热辊冷带(NSR-HR)和冷辊热带(HSR-NR)3种不同加热方式下AZ91镁合金轧制过程热-力行为,并进行了大压下率热辊冷带工艺试验和组织性能分析.结果表明,HSR-HR、NSR-HR及HSR-NR 3种加热轧制方式的应力三轴度依次增大,中性点附近应力状态软性系数依次减小.... |
| 关 键 词： | 热辊轧制 AZ91镁合金带材 数值模拟 应力状态参数 组织性能 |
Numerical simulation and experimental verification of AZ91 magnesium alloy in strip rolling with different heating methods |
|
| MEI Rui-bin,SHI Xian-li,BAO Li,ZHANG Bi-hui,HOU Jun-qing,LI Chang-sheng.Numerical simulation and experimental verification of AZ91 magnesium alloy in strip rolling with different heating methods[J].China Metallurgy,2022,32(1):112-120. | |
| Authors: | MEI Rui-bin SHI Xian-li BAO Li ZHANG Bi-hui HOU Jun-qing LI Chang-sheng |
| Affiliation: | 1. State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819, Liaoning, China;2. School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,Hebei, China;3. Iron and Steel Research Institute, Shenkan Qinhuangdao General Engineering Design and Research Institute Co., MCC., Qinhuangdao 066010, Hebei, China |
| Abstract: | The thermal-mechanical behavior of AZ91 magnesium alloy in HSR-HR(Hot Strip Rolling with Heated Roll),NSR-HR(Normal Strip Rolling with Heated Roll)and HSR-NR(Hot Strip Rolling with Normal Roll)processes was studied by FEM. Meanwhile, microstructure and properties of AZ91 alloy were investigated after a large reduction with NSR-HR rolling. The results indicated that the order of stress triaxiality from low to high was HSR-HR,NSR-HR and HSR-NR, but soft coefficient of stress state at B point was presented in reverse order. Therefore,NSR-HR was helpful to improvement of plastic limit and crack healing of magnesium alloy in large plastic deformation. The plastic deformation and annealing were realized synchronously through the heat transfer from roll surface to strip in rolling with heated roll resulted in significant improvement of deformability and homogeneity. The macro-morphology of strip after three passes rolling was better and dynamic recrystallization was completed in the microstructure when roll surface temperature was higher than 300 ℃, which was improved the plasticity and strength of AZ91 at room temperature efficiently. The tensile strength and elongation of strip after three passes rolling with roll surface temperature of 350 ℃ and reduction of 67% were 312 MPa and 32.3%,respectively. |
| Keywords: | rolling with heated roll AZ91 magnesium alloy strip numerical simulation stress state parameter microstructure and property |
| 点击此处可从《中国冶金》浏览原始摘要信息 | |
| 点击此处可从《中国冶金》下载全文 | |