摘要
借助ProCAST软件,对A356铝合金构件挤压铸造过程进行了数值模拟研究。结果表明,凝固从铝熔体与模具的接触面开始,拐角区中心处最后凝固。随浇注温度和模具温度升高,凝固时间增加,但比压的增加导致凝固时间缩短。拐角区等效应力最大,中心区等效应力最小。随浇注温度和模具温度升高,最大等效应力下降。最优工艺参数:浇注温度为680~720℃,模具温度为200~300℃,比压大于200MPa。成形试验表明,在优化工艺参数下,成形件充型完整,表面品质高,组织致密,无铸造缺陷。
Numerical simulation of squeeze casting A356 aluminum alloy component was performed by the ProCAST software.The results show that solidification of component started from the contact surface between aluminum melt and die.The final solidification location is located at the center of corner of wheel model.Solidification time is increased with an increase of pouring temperature and die temperature,however it is decreased with an increase of specific pressure.Maximum effective stress occurrs in the corner of component,while the central region has the minimum effective stress.With the increase of pouring temperature or die temperature,maximum effective stress is decreased.The optimized process parameters were presented such as pouring temperature of 680~720℃,die temperature of 200~300℃and specific pressure of more than 200 MPa by numerical simulation.The results of the validation experiment show that A356 aluminum alloy components with desirable surface quality,complete filling and absence of defects can be produced successfully via squeeze casting under the optimized process parameters.
作者
姜巨福
王迎
肖冠菲
邓腾
刘英泽
张颖
Jiang Jufu;Wang Ying;Xiao Guanfei;Deng Teng;Liu Yingze;Zhang Ying(School of Materials Science and Engineering,Harbin Institute of Technology;School of Mechatronics Engineering,Harbin Institute of Technology)
出处
《特种铸造及有色合金》
CAS
北大核心
2020年第7期697-703,共7页
Special Casting & Nonferrous Alloys
基金
国家重点研发计划资助项目(2019YFB2006500)
国家自然科学基金资助项目(51875124)。
关键词
A356铝合金
挤压铸造
数值模拟
温度
比压
A356 Aluminum Alloy
Squeeze Casting
Numerical Simulation
Temperature
Specific Pressure