摘要
对镁合金支撑件压铸模结构改进前后的压铸成形过程进行仿真分析,根据建立的镁合金准固相区多物理场参数模型,综合预测特征区域的凝固场、温度场、应力场在准固相区的变化规律,重点分析准固相区温度梯度、等效应力-屈服强度(-σ-σs)和最大主应力-抗拉强度(σ1-σb)3方面的变化趋势,分析热裂纹成因以及热裂纹区域多物理场变化规律。试验结果与仿真分析结果基本一致。
Die casting process before and after modification for magnesium alloy absorber bracket was simulated by a software. Based on established magnesium alloy multi-physical filed modeling in quasi-solid region (90%<fs<100%),change of solidification field,temperature field and stress field in the quasi-solid region was predicted,focusing on the change principle of quasi-solid region temperature gradient,equivalent stress-yield strength and maximum main stress-tensile strength. Formation of hot tearing and change of multi-physical field in hot-tearing zone were analyzed. The simulated results are well in agreement with experimental ones.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2010年第9期835-839,共5页
Special Casting & Nonferrous Alloys
基金
广东省教育部科技部产学研专项基金资助项目(2009B090600006)
关键词
准固相区
镁合金
热裂成因
压铸成形
仿真
Quasi-solid Region,Magnesium Alloy,Hot Tearing Formation,Die Casting,Simulation
