钒微合金化汽车用铸造镁合金的组织与性能  

Microstructure and properties of vanadium microalloyed cast magnesium alloy for automobile

作　　者：高亚男 郑镭 张全逾 Gao Yanan;Zheng Lei;Zhang Quanyu(Department of Automotive Engineering,Hebei Petroleum University of Technology,Chengde 067000,Hebei,China;College of Mechanical Engineering,North China University of Science and Technology,Tangshan 063210,Hebei,China)

机构地区：[1]河北石油职业技术大学汽车工程系,河北承德067000 [2]华北理工大学机械工程学院,河北唐山063210

出　　处：《钢铁钒钛》2023年第4期190-195,共6页Iron Steel Vanadium Titanium

基　　金：河北省高等学校科学技术研究重点项目(项目编号:ZD2016113)。

摘　　要：为了研究钒微合金化汽车用铸造镁合金的显微组织、耐磨损性能和耐腐蚀性能,在铸造Mg-9Al-1Zn镁合金中添加了不同含量的合金元素钒,并进行了试验合金显微组织、力学性能、耐磨损性能和耐腐蚀性能的测试与对比分析。结果表明,合金元素钒可以有效细化合金内部组织,提高合金的耐磨损性能和耐腐蚀性能。随钒含量由0逐渐增加到0.4%时,试验合金的耐磨损性能和耐腐蚀性能均提高,进一步将钒含量增加到0.5%,则两种性能均开始下降。同不含钒的Mg-9Al-1Zn镁合金相比,当在Mg^(-9)Al^(-1)Zn镁合金中添加0.4%合金元素钒时,合金的磨损体积减小了12.7×10^(−3)mm^(3),减小幅度达29.8%;腐蚀电位正移了0.107 V,正移幅度达到12.2%;抗拉强度、屈服强度和断后伸长率分别增大58、58 MPa、3.3%,增大幅度分别为20.9%、36.0%、40.2%。Mg^(-9)Al^(-1)Zn-V镁合金的合金元素钒含量优选为0.4%。In order to study the microstructure,wear resistance and corrosion resistance of vanadium microalloyed cast magnesium alloy for automobile,different contents of alloy element vanadium were added into the cast Mg^(-9)Al^(-1)Zn magnesium alloy,and the microstructure,wear resistance and corrosion resistance of the test alloy were tested and compared.The results show that the alloy element vanadium can effectively refine the internal structure of the alloy and improve the wear resistance and corrosion resistance of the alloy.With the gradual increase of vanadium content from 0 to 0.4%,both the wear resistance and corrosion resistance of the test alloy have been improved.Further increasing vanadium content to 0.5%will reduce the wear and corrosion resistance.Compared with Mg^(-9)Al^(-1)Zn magnesium alloy without vanadium,when 0.4%alloy element vanadium is added to Mg^(-9)Al^(-1)Zn magnesium alloy,the wear volume of the alloy is reduced by 12.7×10^(−3)mm^(3)or 29.8%,and the positive shift of corrosion potential reaches by 0.107 V or 12.2%.The tensile strength,yield strength and elongation of the alloy are increased by 58,58 MPa and 3.3%respectively,with relative increasing amplitude of 20.9%,36.0%and 40.2%,respectively.The alloy element vanadium content for Mg^(-9)Al^(-1)Zn-V magnesium alloy is preferably at 0.4%.

关 键 词：铸造镁合金 钒微合金化 显微组织 耐磨损性能 耐腐蚀性能 

分 类 号：TF822[冶金工程—有色金属冶金] TG136[一般工业技术—材料科学与工程]