冷却方式对铸态Mg-8.5Al-1Zn-0.3Ti镁合金组织及性能的影响  

Effect of Cooling Method on Microstructure and Properties of Cast Mg-8.5Al-1Zn-0.3Ti Magnesium Alloy

作　　者：魏霞 马志凯[2] 曹江卫[1] WEI Xia;MA Zhikai;CAO Jiangwei(Hebei Institute of Mechanical and Electrical Technology,Xingtai 054000,China;School of Mechanical and Electrical Engineering,Hebei Agricultural University,Baoding 071001,China)

机构地区：[1]河北机电职业技术学院,河北邢台054000 [2]河北农业大学机电工程学院,河北保定071001

出　　处：《热加工工艺》2021年第11期86-88,共3页Hot Working Technology

基　　金：河北省教育厅青年基金项目(QN2019335)。

摘　　要：采用不同的冷却方式制备了汽车用Mg-8.5Al-1Zn-0.3Ti镁合金铸造试样,并进行了显微组织、力学性能和耐腐蚀性能的测试与对比分析。结果表明:与空冷时的组织性能相比,水冷时合金内部显微组织变细、更均匀,室温抗拉强度增大19 MPa,屈服强度增大21 MPa,断后伸长率增大1.4%,腐蚀电位正移51mV,合金的力学性能和耐腐蚀性能均得到提高。Mg-8.5Al-1Zn-0.3Ti magnesium alloy cast samples were prepared by different cooling methods, and the microstructure, mechanical properties and corrosion resistance were tested and compared. The results show that compared with the microstructure and properties of the alloy under air cooling, the microstructure becomes thinner and more uniform,the tensile strength increases 19 MPa at room temperature, the yield strength increases 21 MPa, the elongation after break increases 1.4%, and the corrosion potential is positively shifted 51 mV. The mechanical properties and corrosion resistance of the alloy are improved.

关 键 词：冷却方式 Mg-8.5Al-1Zn-0.3Ti镁合金 水冷 空冷 力学性能 耐腐蚀性能 

分 类 号：TG292[金属学及工艺—铸造] TG146.22[一般工业技术—材料科学与工程]