Transactions of Materials and Heat Treatment

Title：Influence of isothermal forging temperature on microstructure and properties of Mg-8Al-1Zn-0.5Ca magnesium alloy for mechanical shells

Authors： Guo Wei1 Li Tong2

Unit： 1.Department of Mechanical Engineering Henan College of Industry & Information Technology 2.School of Mechanical and Power Engineering Zhengzhou University

KeyWords： isothermal forging temperature Mg-8Al-1Zn-0.5Ca magnesium alloy microstructure wear resistance property corrosion resistance property

ClassificationCode：TH164

year,vol(issue):pagenumber：2024,49(10):15-20

Abstract：

In order to investigate the influence of isothermal forging temperature on the microstructure and properties of Mg-8Al-1Zn-0.5Ca magnesium alloy for mechanical shells, five kinds of isothermal forging temperatures were selected for forging tests on the alloy samples, and the microstructure analysis, and the test and analysis of corrosion resistance and wear resistance properties were conducted. The results show that as the isothermal forging temperature increases from 340 ℃ to 420 ℃, the average grain size of Mg-8Al-1Zn-0.5Ca magnesium alloy first decreases and then increases, the corrosion potential shifts positively first and then negatively, the wear volume first decreases and then increases, and both the corrosion resistance and wear resistance properties first improve and then deteriorate. Compared with the isothermal forging temperature of 340 ℃, the average grain size of Mg-8Al-1Zn-0.5Ca magnesium alloy decreases by 76.1%, the corrosion potential shifts positively by 141 mV, and the wear volume decreases by 66.2% at the isothermal forging temperature of 400 ℃. The research results show that the optimal isothermal forging temperature for Mg-8Al-1Zn-0.5Ca magnesium alloy is 400 ℃.

Funds：

河南省重点研发与推广专项项目（202102310204）

作者简介：郭伟（1982-），男，硕士，副教授,E-mail：61140911@qq.com

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