摘要
主要研究了铸造冷却速度对A380和A383铝合金高压压铸过程中凝固行为的影响。设计了三种不同冷却速度的圆柱模具和三步充型压铸模具,并进行了高压压铸试验。对比了圆柱铸件与三步充型高压铸件的微观组织,分析了冷却速度对压铸铝合金枝晶臂间距等凝固特性及合金的力学性能的影响。结果表明,在高压压铸过程中,枝晶臂间距与冷却速度呈较强的正相关,合金的力学性能与冷却速度与合金的枝晶臂间距同样有着正相关,但随着冷却速度的逐渐增加,合金的力学性能增长幅度逐渐降低。
The influences of casting cooling speed on the solidification behavior of A380 and A383 aluminum alloys during high pressure die casting were studied.Three cylindrical molds and three-step filling die-casting dies were designed and the high-pressure die-casting experiments were carried out.The microstructure of cylindrical castings and three-step flling high-pressure castings was compared,and the effects of cooling rate on the solidification characteristics such as dendrite arm spacing and mechanical properties of die-cast aluminum alloy were analyzed.The results show that there is a strong positive correlation between the dendrite arm spacing and the cooling rate during the high-pressure die casting process,and the mechanical properties and cooling rate of the alloy are also positively correlated with the dendrite arm spacing of the alloy.However,with the gradual increase of the cooling rate,the increase amplitude of mechanical properties of the alloy decreases gradually.
作者
樊富起
FAN Fuqi(College of Artificial Intelligence,Jiangxi University of Science and Technology,Nanchang 330098,China)
出处
《热加工工艺》
北大核心
2024年第21期162-165,共4页
Hot Working Technology
基金
江西省教育厅自然科学项目(GJJ202018)
江西省教育科学“十四五”规划2023年度一般课题(23YB312)。
关键词
压铸铝合金
冷却速度
枝晶臂间距
显微组织
力学性能
die-casting aluminium alloys
cooling rate
dendrite arm spacing
microstructure
mechanical properties
