Mg-Sn合金化与固溶-时效行为的研究现状  

Research progress on elements addition and solution-aging behavior of Mg-Sn alloys

作　　者：李万东 LI Wandong(Hebei Petroleum University of Technology,Chengde 067000,China)

机构地区：[1]河北石油职业技术大学,河北承德067000

出　　处：《有色金属材料与工程》2023年第5期22-27,共6页Nonferrous Metal Materials and Engineering

基　　金：承德市基础研究资助项目(202205B016)。

摘　　要：作为具备良好发展前景的可时效强化镁合金,Mg-Sn合金通过Mg_(2)Sn相析出强化、固溶强化与细晶强化获得了优异的性能。与Mg-Zn、Mg-Al主要镁合金相比,Sn在Mg中的固溶度较好,析出强化效果优异;另外,Mg_(2)Sn相的熔点高达771.5℃,使Mg-Sn合金成为非稀土系列的低成本耐热镁合金。从合金化、固溶−时效处理工艺分析总结了可时效强化Mg-Sn合金的研究进展,分析Mg-Sn合金时效行为的重要参数及其影响因素,主要目的为细化Mg_(2)Sn析出相或增加Mg_(2)Sn析出相数量;同时,对添加到Mg-Sn合金中的合金元素的固溶效果、细晶效果与形成三元强化相效果进行系统总结与分析,为Mg-Sn合金成分的设计和性能改善提供重要参考。With a good development prospect,the solution-aged Mg-Sn alloys obtain excellent properties by precipitation strengthening,solution strengthening and grains refinement strengthening effects.Compared with Mg-Zn and Mg-Al alloys,the solid solubility of Sn inɑ-Mg matrix is higher and the effective precipitation strengthening is easily achieved.In addition,the melting point of Mg_(2)Sn phase is 771.5℃,resulted in a low-cost and high heat-resistant magnesium alloy without rare earth.In this paper,the research progress of aging strengthening of Mg-Sn alloy was summarized from alloying elements and solution-aging treatment.The important parameters and influencing factors of aging behavior of Mg-Sn alloy was analyzed in detail.The main purpose is to refine Mg_(2)Sn precipitates or increase the number of Mg_(2)Sn precipitates.Meanwhile,the solution-strengthening effect,refinement strengthening effect and ternary phase formation with alloying elements addition to Mg-Sn alloys are systematically summarized and analyzed,which provide important references for composition design and mechanical improvement of Mg-Sn alloys.

关 键 词：Mg-Sn合金 时效处理 Mg_(2)Sn相 析出强化 

分 类 号：TG146.22[一般工业技术—材料科学与工程]