热处理对生物用稀土Mg-Zn合金性能的影响  

Effect of Heat Treatment on Properties of Rare Earth Mg-Zn Alloy for Biology

作　　者：周嘉欣 张倩倩[1] 胡传绪 ZHOU Jia-xin;ZHANG Qian-qian;HU Chuan-xu(School of Mechanical Engineering,Dalian University,Dalian 116622,Liaoning,China)

机构地区：[1]大连大学机械工程学院,辽宁大连116622

出　　处：《铸造》2023年第10期1311-1316,共6页Foundry

基　　金：辽宁省大学生创新创业计划项目(S202211258073);大连大学“学科建设专项——学科交叉项目”(DLUXK-2023-QN-011)。

摘　　要：通过合金化,制备了一种新型的Mg_(95)Zn_(2)Nd_(0.5)YlZr_(0.5)Ca_(1)合金,并对合金进行热处理。采用OM、SEM和EDS分析合金的微观组织,使用电子拉伸试验机、维氏硬度计分析合金微观组织对力学性能的影响。通过浸泡试验,分析热处理对合金耐蚀性能的影响。结果表明:合金元素的存在,细化了合金的晶粒尺寸,热处理使铸态合金的晶粒尺寸发生一定的长大,组织均匀,合金元素的溶入能够改善含Ca镁合金的塑性,有利于其综合性能的提高。由于晶内第二相的溶入,热处理能显著提高合金的耐蚀性能,腐蚀速率降为铸态合金的一半左右,利于促进合金的实际应用。A new Mg_(95)Zn_(2)Nd_(0.5)YlZr_(0.5)Ca_(1)alloy was prepared by alloying,and the alloy was heat treated.OM,SEM and EDS were used to analyze the microstructure of the alloy,and electronic tensile testing machine and Vickers hardness tester were used to analyze the influence of microstructure on mechanical properties.The influence of heat treatment on corrosion resistance of the alloy was analyzed by soaking experiment.The results showed that the presence of alloying elements refines the grain size of the alloy,the heat treatment made the grain size of the as-cast alloy grow to a certain extent,and the microstructure was uniform.The melting of alloying elements could improve the plasticity of the Ca-containing magnesium alloy and was beneficial to its comprehensive properties.Due to the dissolution of the second phase in the crystal,the corrosion resistance of the alloy could be significantly improved by heat treatment,and the corrosion rate was reduced to about half of that of the as-cast alloy,which was conducive to promoting the practical application of the alloy.

关 键 词：镁合金 稀土 热处理 耐蚀性 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG151.1[金属学及工艺—金属材料]