Transactions of Materials and Heat Treatment

Title：Influence of aging treatment on microstructure and properties of Mg-12Zn-2Ca alloy

Authors： Wang Bo

Unit： Bohai Shipbuilding Vocational College

KeyWords： Mg-12Zn-2Ca alloy aging treatment hardness equiaxed crystal the second phase

ClassificationCode：TG146.2

year,vol(issue):pagenumber：2020,45(9):177-180

Abstract：

Mg-12Zn-2Ca magnesium alloy was conducted by different T6 treatment processes (Solution and artificial aging), and its microstructure and hardness were tested. Then, the influences of aging treatment process on microstructure and properties of Mg-12Zn-2Ca alloy were studied. The results show that the hardness of Mg-12Zn-2Ca alloy increases sharply with the increasing of aging time when it is aging treated for different times after solid solution of 380 ℃×20 h, and it reaches the stage high point when aging for 12 h. After that, it fluctuates in a relatively small interval and reaches its highest point when aging for 96 h; then it drops significantly. Thus, when Mg-12Zn-2Ca alloy is treated under 380 ℃×20 h for solid solution and 180 ℃×96 h for aging, the hardness of alloy gets its maximum value of 89.7 HBW, and its microstructure is equiaxed α-Mg matrix phase and the second phases such as Mg5Zn13Ca2 and Mg6Zn3Ca2 which are distributed between α-Mg phase and inside α-Mg phase。

Funds：

王博（1981-），男，硕士，副教授 E-mail：wangbo411@163.com

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