| 高应变速率对690合金热变形及可挤性的影响 |
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| 引用本文： | 李郑周,佴启亮,王宝顺,苏诚,董建新.高应变速率对690合金热变形及可挤性的影响[J].稀有金属材料与工程,2018,47(11):3372-3380. |
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| 作者姓名： | 李郑周 佴启亮 王宝顺 苏诚 董建新 |
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| 作者单位： | 北京科技大学材料科学与工程学院,浙江久立特材科技股份有限公司博士后工作站,浙江久立特材科技股份有限公司,浙江久立特材科技股份有限公司,北京科技大学材料科学与工程学院 |
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| 摘 要： | 利用Gleelbe热模拟实验以及有限元分析了高应变速率对690合金热变形行为以及挤压可行性的影响,并根据实验和有限元结果进行挤压。结果表明：690合金的流变应力对应变速率均较敏感；大于10 s-1 的高应变速率下,变形温升显著上升；再结晶晶粒尺寸在低应变速率下,随应变速率的升高而降低,高应变速率则随应变速率的增加而增大；挤压时,最大挤压力随着应变速率的上升先降低再升高；根据实验以及有限元计算结果,成功挤出了合格的690管材。
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| 关 键 词： | 690合金 高应变速率 有限元模拟 热挤压 |
| 收稿时间： | 2018/5/5 0:00:00 |
| 修稿时间： | 2018/6/8 0:00:00 |
The Effect of High Strain Rate on Hot Deformation Behavior and Extrusion Feasibility of 690 Alloy |
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| Li Zhengzhou,Nai Qiliang,Wang Baoshun,Su Cheng and Dong Jianxin.The Effect of High Strain Rate on Hot Deformation Behavior and Extrusion Feasibility of 690 Alloy[J].Rare Metal Materials and Engineering,2018,47(11):3372-3380. |
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| Authors: | Li Zhengzhou Nai Qiliang Wang Baoshun Su Cheng and Dong Jianxin |
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| Affiliation: | School of Materials Science and Engineering,University of Science and Technology Beijing,Zhejiang Jiuli Hi-tech Metals Co., Ltd.,,,School of Materials Science and Engineering,University of Science and Technology Beijing |
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| Abstract: | The effects of high strain rate on hot deformation behavior and extrusion feasibility were investigated by Gleeble thermal-simulation experiment and finite element method (FEM). The results show that the flow stress of 690 alloy is sensitive to the strain rate. The temperature rise in the alloy deformed with high strain rate (above 10 s-1) is significant. The recrystallization grain size decreases with the increase of strain rate under low strain rate, however, that increase with the increase of strain rate under high strain rate. The maximum extrusion force presented earlier decrease and later increase trend with the increase of extrusion rate. The 690 pipe were succeesfully extruded according to the experiment and FEM results. |
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| Keywords: | 690 alloy high strain rate finite element method hot extrusion |
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