Effects of technical parameters of continuous semisolid rolling on microstructure and mechanical properties of Mg-3Sn-1Mn alloy  

工艺参数对连续流变轧制成形Mg-3Sn-1Mn合金板材组织和力学性能的影响(英文)

作　　者：管仁国[1] 赵占勇[1] 钞润泽[1] 赵红亮[2] 刘春明[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004 [2]郑州大学材料科学与工程学院,郑州450002

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第1期73-79,共7页中国有色金属学报（英文版）

基　　金：Project(51222405) supported by the National Science Foundation of Outstanding Young Scholars of China;Project(51034002) supported by the National Natural Science Foundation of China;Project(132002) supported by the Fok Ying Tong Education Foundation;Project (2011CB610405) supported by the National Basic Research Program of China

摘　　要：A sloping semisolid rheo-rolling process of Mg-3Sn-1Mn alloy was developed, and the effects of process parameters on the microstructure and mechanical properties of Mg-3Sn-lMn alloy strip were studied. The results show that the primary grain average diameter of the strip increases with the increase of the roll speed. The primary grain average diameter decreases firstly and then increases with the increase of the vibration frequency, and the tensile strength and elongation of the strip increase firstly and then decrease with the increase of the vibration frequency. The primary grain average diameter increases with the increase of casting temperature, and the tensile strength and elongation of the strip decrease correspondingly. When the casting temperature is 670℃, the roll speed is 52 mm/s, and the vibration frequency is 60 Hz, Mg-3Sn-1Mn alloy strip with good properties is produced. The mechanical properties of the present product are higher than those of Mg-3Sn-lMn alloy casting with the addition of 0.87% Ce （mass fraction）.开发了Mg-3Sn-1Mn合金板材倾斜板连续流变轧制成形工艺,并研究工艺参数对合金板材微观组织和力学性能的影响。结果表明:随着轧辊转速的增加,板材的初生晶粒平均直径增大;随着倾斜板振动频率增加,板材的初生晶粒平均直径先减小后增大,板材的抗拉强度和伸长率先增加后降低。随着浇注温度的升高,板材的初生晶粒平均直径逐渐增大,板材的抗拉强度和伸长率逐渐降低。当浇注温度为670℃、轧辊转速为52mm/s、倾斜板振动频率为60Hz时,制备了组织性能较好的Mg-3Sn-1Mn合金板材,其力学性能优于添加0.87%Ce(质量分数)的Mg-3Sn-1Mn合金热轧板材的力学性能。

关 键 词：Mg-3Sn-lMn alloy SEMISOLID continuous rheo-rolling forming microstructure mechanical properties 

分 类 号：TG335[金属学及工艺—金属压力加工]