快速凝固AZ31镁合金的微观组织与力学性能

孙宇初; 陈云贵

快速凝固AZ31镁合金的微观组织与力学性能

孙宇初^1,2,
陈云贵^2,3

1. 四川大学新能源与低碳技术研究院, 四川成都 610207;
2. 四川大学材料科学与工程学院, 四川成都 610065;
3. 后续能源材料与器件教育部工程研究中心, 四川成都 610064

详细信息

作者简介:
孙宇初,男,1998年生,硕士研究生,研究方向为快速凝固镁合金。E-mail:yuchusun@163.com

中图分类号: TG113
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出版历程
- 收稿日期: 2023-05-13
- 网络出版日期: 2024-05-08

Microstructure and Mechanical Characteristics of Rapidly Solidified AZ31 Magnesium Alloy

SUN Yuchu^1,2,
CHEN Yungui^2,3

1. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China;
2. College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China;
3. Engineering Research Center of Alternative Energy Materials and Devices, Ministry of Education, Chengdu 610064, China

摘要

摘要: 基于单辊快速凝固工艺,分析了不同辊速条件下AZ31镁合金的带材组织及其250 ℃热挤压棒材的力学性能。结果表明,带材截面微观组织存在的急冷定向凝固区和缓冷等轴晶区,是受温度梯度影响产生的微观组织分区现象;熔体冷却时裹气产生隔热区,导致带材微观组织均一度降低;在17.58 m/s最优辊速条件下,AZ31镁合金的250 ℃热挤压棒材的屈服强度和伸长率分别达到360 MPa和14.47 %。
- 快速凝固 /
- AZ31镁合金 /
- 热挤压 /
- 力学性能
Abstract: AZ31 magnesium ribbons are prepared by the single roll rapid solidification method at different rolling speeds, and the microstructures are analyzed. The mechanical properties of AZ31 magnesium rods extruded at 250 ℃ from the ribbons are investigated. Results indicate that the rapid cooling directionally solidification region and gradual cooling equiaxed grain region are found in the cross-sections of the AZ31 magnesium ribbons, which is a thermal-gradient driven microstructure partition phenomenon. The heat insulation zone forms due to the gas entrapment in the melt pool, leading to the decline of microstructural homogeneity of the ribbons. It is found out that when the rolling speed is 17.58 m/s, the AZ31 magnesium rods extruded at 250 ℃ from the ribbons have the optimal performance, with the yield strength up to 360 MPa and the elongation up to 14.47 %.
- rapid solidification /
- AZ31 magnesium alloys /
- hot extrusion /
- mechanical property

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参考文献(13)

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