汽车用AZ31合金的组织与力学性能研究  

Microstructure and Mechanical Properties of AZ31 Alloy for Automobile

作　　者：阴丽华[1] 曾显恒[1] 林芳[2] 

机构地区：[1]河南职业技术学院,河南郑州450000 [2]河南科技大学材料科学与工程学院,河南郑州450001

出　　处：《铸造技术》2017年第2期304-307,共4页Foundry Technology

摘　　要：采用金相显微镜、X射线衍射仪、扫描电镜和力学性能测试等手段,对Nd微合金化的汽车用AZ31合金进行了铸态组织与常温力学性能的研究,并探讨了Nd元素的作用机理。结果表明,在铸态AZ31合金中添加Nd元素可以有效细化合金晶粒尺寸,并在一定程度上增加合金的硬度和力学性能;当合金中Nd元素含量为0.4%时可以取得最佳的强度和塑性结合,继续增加Nd元素含量强度和塑性反而降低。Nd元素的强化作用机理主要为:细晶强化和弥散强化。By means of optical microscope, X-ray diffraction, scanning electron microscopy and mechanical properties testing, the as cast microstructure and mechanical properties of AZ31 alloy with Nd were studied, and the effect mechanism of Nd element was discussed. The results show that the addition of Nd element can effectively refine the grain size of AZ31 alloy and increase the hardness and mechanical properties of the alloy. When the content of Nd element in the alloy is 0.4%, the optimal strength and plasticity can be obtained, and the strength and ductility decrease when continue to increase the content of Nd. The strengthening mechanism of Nd element is mainly fine grain strengthening and dispersion strengthening.

关 键 词：AZ31合金 晶粒 力学性能 断口形貌 

分 类 号：U465.22[一般工业技术—材料科学与工程]