浇注温度对7075铝合金连杆压铸件缺陷及组织的影响

Effect of Pouring Temperature on Defects and Solidification Structure of 7075 Alloy Connecting Rod Casting

利用模拟软件MAGMAsoft对7075铝合金连杆压铸件模拟计算,研究浇注温度对铸件缺陷的影响,并通过压铸试验进行验证。结果表明,浇注温度越低,缺陷形成倾向越小。通过观察不同浇注温度下的压铸件的显微组织,发现随着浇注温度降低,晶粒细小,树枝状枝晶体向等轴晶转变。

Effects of pouring temperature on defects of 7075 alloy connecting rod parts were simulated by the MAGMAsoft and validated by die casting experiment.The results show that the probability of defects is decreased with decreasing in pouring temperature.Through observing microstructure of the 7075 connecting rod parts at different pouring temperatures,it shows that the grain size is decreased with the decrease of pouring temperature,and the dendrites are converted into the equiaxed grain.