热挤压Mg-3Sn-1Zn-xCu合金的显微组织与力学性能

doi:10.11896/j.issn.1005-023X.2018.20.012

材料导报

2018, Vol. 32

Issue (20): 3562-3565 https://doi.org/10.11896/j.issn.1005-023X.2018.20.012

金属与金属基复合材料

热挤压Mg-3Sn-1Zn-xCu合金的显微组织与力学性能

程鹏¹, 陈云贵², 丁武成², 王春明²

1 四川大学空天科学与工程学院,成都 610065;
2 四川大学材料科学与工程学院,成都 610065;

Microstructure and Mechanical Properties of Hot-extruded Mg-3Sn-1Zn-xCu Alloys

CHENG Peng¹, CHEN Yungui², DING Wucheng², WANG Chunming²

1 School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065;
2 College of Materials Science and Engineering, Sichuan University, Chengdu 610065;

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摘要研究了添加Cu对热挤压Mg-3Sn-1Zn合金显微组织和力学性能的影响。结果表明:添加少量Cu能显著细化热挤压Mg-3Sn-1Zn合金晶粒,同时在合金中形成具有高热稳定性的CuMgZn相,提高了合金的室温及高温强度和塑性。当Cu含量为0.5%时,热挤压Mg-3Sn-1Zn-0.5Cu合金的晶粒最细,为2.8 μm;其强度和塑性最高,室温屈服强度为241 MPa,伸长率为20.3%,150 ℃时屈服强度为128 MPa,室温拉伸力学性能优于挤压态AZ31B合金,高温强度优于铸态AE42合金。

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关键词: 铜 Mg-3Sn-1Zn合金热挤压显微组织力学性能

Abstract: Effects of Cu on microstructure and mechanical properties of hot-extruded Mg-3Sn-1Zn alloy were investigated. The results showed that the grain size of the hot-extruded Mg-3Sn-1Zn alloy was remarkably refined with a small amount of Cu, and the thermostable CuMgZn phase was formed in the alloys. Therefore, the strength and plasticity of the hot-extruded Mg-3Sn-1Zn-xCu alloys improved. The grain of the hot-extruded Mg-3Sn-1Zn-0.5Cu alloy was the finest with a size of 2.8 μm. The tensile yield strength and elongation of the hot-extruded Mg-3Sn-1Zn-0.5Cu alloy at room temperature were 241 MPa and 20.3%, respectively, which were superior to that of the hot-extruded AZ31B alloy. In addition, the tensile yield strength of the Mg-3Sn-1Zn-0.5Cu alloy at 150 ℃ was 128 MPa, which was better than that of as-cast AE42 alloy.

Key words: Cu Mg-3Sn-1Zn alloy hot-extrusion microstructure mechanical properties

出版日期: 2018-10-25 发布日期: 2018-11-22

ZTFLH:

TG146.2+2

作者简介: 程鹏:男,1991年生,硕士研究生,研究方向为高强镁合金 E-mail:1316907554@qq.com 陈云贵:通信作者,男,1960年生,博士,教授,博士研究生导师,研究方向为轻质金属结构材料 E-mail:ygchen60@aliyun.com

引用本文:

程鹏, 陈云贵, 丁武成, 王春明. 热挤压Mg-3Sn-1Zn-xCu合金的显微组织与力学性能[J]. 材料导报, 2018, 32(20): 3562-3565.
CHENG Peng, CHEN Yungui, DING Wucheng, WANG Chunming. Microstructure and Mechanical Properties of Hot-extruded Mg-3Sn-1Zn-xCu Alloys. Materials Reports, 2018, 32(20): 3562-3565.

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http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2018.20.012 或 http://www.mater-rep.com/CN/Y2018/V32/I20/3562

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