摘要
研究了热轧变形及固溶、时效处理对含LPSO相Mg-12.20Y-2.45Zn-0.5Al(wt%)镁合金的微观组织和力学性能的影响。结果表明,铸态合金经500℃×25 h固溶处理、400℃×0.5h预热处理后,可成功实现对含LPSO镁合金大压下量的两道次轧制变形。轧制使晶界处的18R-LPSO相发生破碎和均匀分散,晶内的14H相发生扭折弯曲,同时W相分解、Al_(2)(Y,Zn)相破碎细化,大幅提高合金的力学性能。轧制后200℃×24 h时效处理进一步促进大量细小弥散的14H相的形成和应力释放,合金的力学性能显著提升,抗拉强度和伸长率分别达到357.2 MPa、6.8%,比铸态合金分别提升了97.6%、51.1%。
The effect of hot-rolling deformation,solution and aging treatment on the microstructure and mechanical properties of Mg-12.20Y-2.45Zn-0.5Al(wt%) magnesium alloy containing LPSO phase was studied. The results show that the as-cast magnesium alloy containing LPSO after 500℃×25h solution treatment and 400℃×0.5h preheating treatment can be successfully rolled for two passes with large reduction. Rolling makes the 18R-LPSO phase at the crystal boundary broken and uniformly dispersed, and 14H phase in the crystal bent, while W phase decomposes, Al_(2)(Y,Zn) phase is broken and refined, which greatly improves the mechanical properties of the alloy. 200℃ ×24 h aging treatment after rolling further promotes the formation of a large number of small and dispersed 14H phases and stress release, and the mechanical properties of the alloy are significantly improved. The tensile strength and elongation reach 357.2 MPa and 6.8%, respectively, which are increased by 97.6% and 51.1% compared to those of the as-cast alloy, respectively.
作者
孟棫朴
田丰
刘先文
边丽萍
MENG Yupu;TIAN Feng;LIU Xianwen;BIAN Liping(Science and Technology Talents and Cooperation Center of Shanxi Province,Taiyuan 030021,China;School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《热加工工艺》
北大核心
2023年第3期100-102,共3页
Hot Working Technology
基金
山西省重点研发计划项目(201903D121087)
山西省专利推广实施资助专项项目(2019015)。
