稀土铈变质处理Mg-5Al-4Ca-0.8Mn合金的组织与力学性能  

Microstructure and Mechanical Properties of Rare Earth Ce Modified Mg-5Al-4Ca-0.8Mn Alloy

作　　者：杨清宇 梅宏标[2] YANG Qingyu;MEI Hongbiao(Guangdong Province Fuyuan Rare Earth Co.,Ltd.,Meizhou 514600,China;Gannan University of Science and Technology,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]广东省富远稀土有限公司,广东梅州514600 [2]江西理工大学赣南科技学院,江西赣州341000

出　　处：《热加工工艺》2024年第9期101-103,共3页Hot Working Technology

基　　金：江西省教育厅自然科学基金项目(GJJ171498);赣州市科技局创新人计划项目(2018-179)。

摘　　要：采用稀土Ce对Mg-5Al-4Ca-0.8Mn合金进行了变质处理,采用OM、SEM、硬度测试、拉伸试验研究了Ce添加量对Mg-5Al-4Ca-0.8Mn合金微观组织和力学性能的影响。结果表明:稀土Ce对Mg-5Al-4Ca-0.8Mn合金有较好的变质效果。Ce添加量为0.8%时,合金晶界清晰,组织均匀性最佳,细化效果最好。Ce添加量增加到1.2%时,合金组织细化效果减弱。随着Ce添加量的增加,合金的硬度、抗拉强度和伸长率均先升高后降低,Ce添加量0.8%的合金的硬度、抗拉强度和伸长率均达到最大值,综合力学性能最好。Mg-5Al-4Ca-0.8Mn alloy was modified with rare earth Ce.The effects of the Ce addition on the microstructure and mechanical properties of Mg-5Al-4Ca-0.8Mn alloy were investigated by OM,SEM,hardness test and tensile test.The results show that Ce has a good effect on the modification of Mg-5Al-4Ca-0.8Mn alloy.When the Ce content is 0.8%,the grain boundary of the alloy is clear,the uniformity is best,and the microstructure refinement effect is best.When the Ce content is increased to 1.2%,the microstructure refinement effect of the alloy is weakened.With the increase of Ce content,the hardness,tensile strength and elongation of the Mg-5Al-4Ca-0.8Mn alloy increase first and then decrease.The hardness,tensile strength and elongation of the alloy with 0.8%Ce content all reach the maximum values,and the comprehensive mechanical properties are best.

关 键 词：Mg-5Al-4Ca-0.8Mn合金 CE 变质 微观组织 力学性能 

分 类 号：TG292[金属学及工艺—铸造] TG146[一般工业技术—材料科学与工程]