摘要
为提高汽车材料AZ91镁合金的综合力学性能,采用粉末冶金法在合金中加入纯金属La制备试件.使用金相电子显微镜、硬度测试仪、万能拉压试验机,研究La对AZ91镁合金试件金相组织、硬度及压缩性能的影响.实验结果表明:当La添加量为1.2%时,试件的力学性能达到最佳,硬度达到67.1 HV,抗压强度达到115.8 MPa,比AZ91镁合金基体分别提高了20.0%和29.5%,而且此添加量对AZ91镁合金的晶粒细化效果最好.
In order to improve the comprehensive mechanics performance of AZ91 magnesium alloy which was used as car’s material,metal La was added in AZ91 magnesium alloy,and specimens were prepared by powder metallurgy method. The influence of La on microstructure,hardness and compression performance of AZ91 magnesium alloy specimens was studied using metallographic electronic microscope,hardness tester,universal tension and compression testing machine. The experimental results showed that when the addition amount of La was 1. 2%,the specimens’ mechanical performance was best： hardness 67. 1 HV,compressive strength 115. 8 MPa,which increased respectively by 20. 0% and 29. 5% compared with the AZ91 magnesium alloy substrate,and the grain refinement effect of AZ91 magnesium alloy was the best at the same time.
出处
《郑州轻工业学院学报（自然科学版）》
CAS
2014年第2期8-10,共3页
Journal of Zhengzhou University of Light Industry:Natural Science
基金
河南省科技创新团队项目(10CXTD159)
关键词
粉末冶金
AZ91镁合金
La添加量
硬度
抗压强度
力学性能
powder metallurgy
AZ91 magnesium alloy
addition La
hardness
compressive strength
mechanics performance
