摘要
针对6005A铝合金反向挤压温度演变和材料流变特性进行了有限元分析和试验验证。在此基础上研究了实际挤压工艺对材料挤压性能的影响。结果表明,试样的出口温度和挤压峰值载荷随着挤压速度的增加而升高,而材料流变死区随挤压过程的进行向坯料近模具端口收缩,但总体形状保持不变。在挤压过程进入稳定阶段后,材料的应变速率保持恒定。对于反向挤压工艺,坯料挤压温度、挤压比和挤压速度是决定试样最终组织和力学性能的主要因素。
Temperature change and metal flow behavior of indirect extruded 6005A aluminum alloy were analyzed by the FEM method and experimental verification. Based on the analyses,effects of practical extrusion parameters on properties of the alloy were analyzed. The results reveal that outlet temperature and extrusion loading peak value of the product are increased with increasing in ram velocity,while dead metal zone are shrank to the top of the die without shape change. Strain rate of the metal flow keeps constant with extrusion process tending toward steady stage. The microstructure and mechanical properties of the indirect extruded aluminum profiles are controlled by extruding temperature,ram velocity and extrusion ratio.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2010年第9期797-799,共3页
Special Casting & Nonferrous Alloys
基金
甘肃省科技重大专项(0702GKDJ009)
