Sn、Ca含量对挤压铸造Mg-Sn-Ca合金组织和性能的影响  

Effects of Sn,Ca Addition on Microstructure and Properties of Squeezing Casting Mg-Sn-Ca Alloy

作　　者：秦建[1] 赵第甲 陈露 李建宇 潘宇 吴树森[1] 郭威[1] 吕书林[1] Qin Jian;Zhao Dijia;Chen Lu;Li Jianyu;Pan Yu;Wu Shusen;Guo Wei;LüShulin(State Key Laboratory of Materials Forming and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074)

机构地区：[1]华中科技大学材料成形与模具技术全国重点实验室,武汉430074

出　　处：《特种铸造及有色合金》2024年第1期68-73,共6页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52175321)。

摘　　要：研究了Sn和Ca含量对挤压铸造Mg-Sn-Ca合金组织和力学性能的影响。结果表明,随着Sn含量上升,Mg-Sn合金的晶粒细化,Mg_(2)Sn相逐渐增多,合金力学性能升高,当Sn含量为5%时性能理想。当Ca含量不超过1%时,随着Ca含量上升,Mg-Sn-Ca合金晶粒明显细化并形成CaMgSn相,合金力学性能逐渐提高;当Ca含量超过1%时,合金中第二相粗化并发生团聚,导致合金性能降低。The effects of Sn and Ca content on microstructure and mechanical properties of Mg-Sn alloy by squeezing casting were investigated. The results indicate that with the increase of Sn content, the grain of Mg-Sn alloy is refined, and the amounts of Mg_(2)Sn phase are gradually increased, so the mechanical properties of the alloy are improved, and the performance reaches desirable when the Sn content is 5%. When Ca content is below 1%, with the increase of Ca content, the grains of Mg-Sn-Ca alloy are significantly refined and Ca-Mg-Sn phase can be generated, so the mechanical properties of the alloy are gradually improved. When the Ca content is more than 1%, the second phase is coarsened and agglomerated in the alloy, resulting in a decrease in properties of the alloy.

关 键 词：镁合金 挤压铸造 微观组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG249.2[金属学及工艺—金属材料]