金属学报  2007, Vol. 43 Issue (8): 857-862

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Al2O3sf/LY12复合材料液固挤压成形中温度场演变的三维有限元分析

王振军;齐乐华;周计明;杨 方

西北工业大学机电学院

ANALYSIS ON THE TEMPERATURE FIELD DURING Al2O3sf/LY12 COMPOSITES LIQUID-SOLID EXTRUSION PROCESS USING 3D FEM SIMULATION

西北工业大学机电学院

王振军; 齐乐华; 周计明; 杨方 . Al2O3sf/LY12复合材料液固挤压成形中温度场演变的三维有限元分析[J]. 金属学报, 2007, 43(8): 857-862 .

摘要 参考文献 相关文章 Metrics 全文: PDF(728 KB)   摘要: 建立了液固挤压Al2O3sf/LY12复合材料三维非稳态传热过程的有限元数学模型, 并对其进行了三维热传导数值模拟, 直观地显示出材料内部和表面在不同时刻、不同位置的三维温度场分布及其演变情况. 模拟结果表明, 坯料内部和表面的温度场在保压过程中分布均匀,而在挤压过程中则随时间推移而剧烈波动, 从而造成坯料表面局部过热, 由此导致制件表面龟裂现象的发生. 模拟结果与实验结果基本吻合, 为合理确定工艺参数和保证成形质量奠定了理论基础. 关键词 ： Al2O3/LY12复合材料,  液固挤压,  三维有限元     Abstract：In the present work, the 3D FE mathematical model which characterized the heat conduction in composites liquid-solid extrusion process was established. The 3D temperature field was obtained to reveal the temperature distribution and evolution of the billet using 3D heat conduction numerical simulation. The results indicated that during the pressure-keeping stage, the temperature field distributed evenly at the surface and inner part of the billet. In the extrusion process, however, they fluctuated tempestuously which lead to partial overheating on billet surface and result in superficial crack. The flaw analysis and forecast were validated to the experimental result of extruded product. The work laid a theoretical and technical foundation for the rational choice of process parameter to enhance product quality. Key words： 收稿日期: 2006-12-04      ZTFLH:  TG37   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 王振军 齐乐华 周计明 杨方 44.8K 链接本文: https://www.ams.org.cn/CN/Y2007/V43/I8/857 [1]Qi L H,Li H J,Cui P L,Shi Z K.Trans Nonferrous Met Soc Chin,2003;13:803 [2]Ren X Q,Hu L X,Sun X M,Luo S J.Acta Metall Sin, 1996;32:544 (任向前，胡连喜，孙晓梅，罗守靖．金属学报，1996；32：544) [3]Qi L H,Cui P L,Shi Z K,Li H J.Acta Metall Sin,2002; 38:549 (齐乐华，崔培玲，史忠科，李贺军．金属学报，2002；38：549) [4]Hartley P,Pillinger I.Comput Method Appl Mech Eng, 2006;195:6676 [5]Pater Z.J Mater Process Technol,2006;173:201 [6]Zhou J,Li L,Duszczyk J.J Mater Process Technol,2004; 146:203 [7]Zhou J M,Qi L H,Chen G D,Zhang Y B.J Plast Eng, 2005;12(5):58 (周计明，齐乐华，陈国定，张跃冰．塑性工程学报，2005；12(5)：58) [1] 赵 冰 李志强 韩秀全 廖金华 侯红亮 白秉哲. 基于刚黏塑性本构关系的钛合金空心整体结构成形过程三维有限元分析[J]. 金属学报, 2010, 46(4): 396-403. Viewed Full text Abstract Cited   Shared      Discussed