| 12 vol%SiCP/2024Al基复合材料热挤压过程有限元模拟与分析 |
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| 作者单位： | (1. 中国科学院 金属研究所, 沈阳 110016;2. 东北大学 材料与冶金学院, 沈阳 110004;3. 北京卫星制造厂, 北京 100080) |
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| 基金项目： | 国家973重点基础研究发展计划项目(2006CB605306) |
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| 摘 要： | 基于MSC.Marc软件平台，建立了含SiCP体积分数为12%的SiCP/2024Al复合材料热挤压轴对称刚-塑性热力耦合有限元分析模型。利用该模型对复合材料的热挤压过程进行模拟，分析了热挤压过程中的载荷-行程曲线和材料流动状态，讨论了模具温度及挤压速度对挤压载荷的影响。模拟结果表明，该坯料在挤压比为30∶1、挤压温度为400～450℃、挤压速度为0.1～1.0 mm/s、挤压载荷为4.0 ×106～5.0 ×106N之间能够顺利挤出表面无缺陷的复合材料棒材。最后通过在 700 t水压机上采用相同工艺挤出高质量的复合材料棒材验证该工艺的可行性。
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| 关 键 词： | 金属基复合材料 热挤压 有限元分析 热模拟 流线 |
| 收稿时间： | 2008-09-23 |
| 修稿时间： | 2009-02-14 |
Finite element simulation and analysis of 12 vol% SiCP/2024AI matrix composites for hot extrusion process |
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| Affiliation: | (1. Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China;2. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;3. Beijing Spacecrafts, Beijing 100080, China) |
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| Abstract: | An axisymmetric rigid-plastic and coupled thermo-mechanical FEM model of SiCP/2024Al composite (volume fraction of SiCP12%) for plat die hot extrusion process was established based on the software MSC. Marc. The model was used to simulate the hot extrusion process of the material. The pressure-stroke curves and flow lines were analyzed and the effects of temperature of billet and extrusion velocity were discussed. The result sindicate that bars without surface defects can be obtained smoothly under the condition of the extrusion ratio 30∶1，temperature 400～450℃，extrusion rate 0.1～1.0 mm/s and extrusion pressure 4.0 ×106～5. 0 ×106N. The quality bars were got following the same process on 700 t hydraulic press to prove the feasibility of this process. |
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| Keywords: | metal matrix composites hot extrusion finite element analysis thermo-simulation flow lines |
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