EFFECT OF PREDEFORMATION MANNER ON SEMI-SOLID STRUCTURE OF AZ61 MAGNESIUM ALLOY IN SIMA PROCESS

金属学报(英文版), 2008, 21(3): 197-204.

^1, , ^2, , ^3, , ^4,

1.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330000, China;School of Mechanical Engineering, Hunan Industrial University, Zhuzhou 412008, China

2.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330000, China

3.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330000, China

4.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330000, China

基金项目: 国家自然科学基金(50465003)

EFFECT OF PREDEFORMATION MANNER ON SEMI-SOLID STRUCTURE OF AZ61 MAGNESIUM ALLOY IN SIMA PROCESS

G.P.Chen ^1, , T.R.Zhou ^2, , H.Yan ^3, , F.Y.Zhang ^4,

1.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330000, China;School of Mechanical Engineering, Hunan Industrial University, Zhuzhou 412008, China

2.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330000, China

3.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330000, China

4.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330000, China

Keywords： AZ61 magnesium alloy

The effect of predecformation manner, predeformation ratio and isothermal heat-treat parameter on the non-dendrite structure of AZ61 magnesium alloy in SIMA process was studied. Under coequal heat-treat condition, the impact of the hot upsetting predeformation on semi-solid microstructure in SIMA process was compared with that of the cold compressive predeformation. The results indicate that non-dendrite microstructure in AZ61 magnesium alloy billets can be obtained by hot or cold upsetting predeformation in SIMA process, although their mechanisms of evolution are different.Increasing hot or cold upsetting predeformation ratio can enhance the effect and quality of the non-dendrite microstructure formed before storage energy up to saturation,but the proper isothermal temperature and holding time should be selected.

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EFFECT OF PREDEFORMATION MANNER ON SEMI-SOLID STRUCTURE OF AZ61 MAGNESIUM ALLOY IN SIMA PROCESS

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