ZTM630镁合金双级时效实验研究

doi:10.3976/j.issn.1002-4026.2018.03.006

山东科学 ›› 2018, Vol. 31 ›› Issue (3): 34-38.doi: 10.3976/j.issn.1002-4026.2018.03.006

ZTM630镁合金双级时效实验研究

王娜娜¹,周吉学¹,刘玉¹,赵东清¹,马百常¹,杨院生²

1.齐鲁工业大学（山东省科学院），山东省科学院新材料研究所，山东省轻质高强金属材料重点实验室，山东省汽车用镁合金轻量化示范工程技术研究中心，山东济南 250014；2. 中国科学院金属研究所，辽宁沈阳 110016

收稿日期:2017-10-08 出版日期:2018-06-20 发布日期:2018-06-20
作者简介:王娜娜（1990—），女，硕士，研究实习员，研究方向为镁合金微观组织分析。E-mail：wangnn@sdas.org
基金资助:
山东省重点研发计划（2017CXGC0404）；国家重点研发计划（2016YFB0301105）

Experimental study on two-stage aging treatment of ZTM630 magnesium alloy

WANG Na-na¹, ZHOU Ji-xue¹, LIU Yu¹, ZHAO Dong-qing¹, MA Bai-chang¹, YANG Yuan-sheng²

1.Shandong Engineering Research Centre for Lightweight Automobiles Magnesium Alloy, Shandong Provincial Key Laboratory for High Strength Lightweight Metallic Materials, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Science), Jinan 250014, China; 2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016，China

Received:2017-10-08 Online:2018-06-20 Published:2018-06-20

摘要/Abstract

摘要：

通过改变Mg-6Zn-3Sn-0.5Mn合金终时效时间，利用金相显微镜、扫描显微镜、透射电子显微镜观察挤压态ZTM630合金在双级时效后的微观组织特征。结果表明，该合金比较适宜的双级时效参数为90 ℃×12 h+180 ℃×8 h，在该参数下合金的抗拉强度、伸长率分别为383.1 MPa、7.667%。双级时效之后，在基体与晶界处都有弥散细小的析出相析出，主要为Mg2Sn、MgZn2相化合物。在拉伸过程中弥散细小析出相的析出强化作用和阻碍晶粒移动产生的强化作用，使得合金的力学性能更优。

关键词: 双级时效, 微观组织, Mg-Zn-Sn-Mn合金

Abstract:

By changing the finalaging time, the microstructure evolution and mechanical properties of extruded Mg-6Zn-3Sn-0.5Mn alloy were investigated by means of optical electron microscopy, scanning electron microscopy and transmission electron microscopy. Results showed that through the twostep aging treatment, the suitable parameter was 90 ℃×12 h+180 ℃×8 h. Under this parameter, ultimate tensile strength and elongation of the alloy reached 383.1 MPa,7.667%, respectively. After two-step aging treatment, there were dispersed and fine precipitates precipitated in matrix and grain boundaries, which were mainly of Mg2Sn and MgZn2 phases. During the process of stretching, the precipitation strengthen effect of dispersed fine precipitated phase and the strengthening effect inhibiting the grain movement made the mechanical properties of the alloy better.

Key words: Mg-Zn-Sn-Mn alloy, two-step aging treatment, microstructure

中图分类号:

TG146.2

王娜娜，周吉学，刘玉，赵东清，马百常，杨院生. ZTM630镁合金双级时效实验研究[J]. 山东科学, 2018, 31(3): 34-38.

WANG Na-na, ZHOU Ji-xue, LIU Yu, ZHAO Dong-qing, MA Bai-chang, YANG Yuan-sheng. Experimental study on two-stage aging treatment of ZTM630 magnesium alloy[J]. SHANDONG SCIENCE, 2018, 31(3): 34-38.

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ZTM630镁合金双级时效实验研究

Experimental study on two-stage aging treatment of ZTM630 magnesium alloy

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