论文部分内容阅读
采用熔盐保护法熔铸了Mg-4Li、Mg-8Li及Mg-12Li合金,研究了Li含量变化对Mg-Li合金组织与性能的影响,并探讨了T5热处理对Mg-8Li组织、硬度及压缩性能的影响。结果表明,Mg-4Li合金组织为单相α-Mg固溶体,Mg-8Li合金组织为α+β双相固溶体,Mg-12Li合金组织为单相β-Li固溶体。三种合金中Mg-8Li合金硬度最高。随时效温度提高和保温时间延长,Mg-8Li合金的硬度增大,175℃×12 h时Mg-8Li合金既保持了较高的抗压强度,又有较好的塑性变形能力。
Mg-4Li, Mg-8Li and Mg-12Li alloys were cast by molten salt protection method. The effects of Li content on the microstructure and properties of Mg-Li alloy were studied. The effects of T5 heat treatment on microstructure, hardness and compression The impact of performance. The results show that the microstructure of Mg-4Li alloy is single-phase α-Mg solid solution, the microstructure of Mg-8Li alloy is α + β binary solid solution, and the Mg-12Li alloy is single-phase β-Li solid solution. Among the three alloys, the hardness of Mg-8Li alloy is the highest. With the increase of aging temperature and holding time, the hardness of Mg-8Li alloy increases. While 175 ℃ × 12 h, Mg-8Li alloy maintains high compressive strength and good plastic deformation ability.