稀土Y元素对铸态镁合金组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2020.10.033

金属热处理 ›› 2020, Vol. 45 ›› Issue (10): 171-174.DOI: 10.13251/j.issn.0254-6051.2020.10.033

稀土Y元素对铸态镁合金组织与力学性能的影响

张旭东¹, 索转霞², 魏博鑫², 王辛³, 曹国剑²

1.徐工铲运机械事业部下料分厂, 江苏徐州 221000;
2.哈尔滨理工大学材料科学与工程学院, 黑龙江哈尔滨 150040;
3.哈尔滨理工大学化学与环境工程学院, 黑龙江哈尔滨 150040

收稿日期:2020-03-17 出版日期:2020-10-25 发布日期:2020-12-29
作者简介:张旭东(1981—),男,工程师,主要研究方向为轻合金铸造成形,E-mail: xudongzhang59@126.com
基金资助:
国家自然科学基金青年科学基金(51804091);哈尔滨市应用技术研究与开发项目(2017RAQXJ009)

Effect of RE element Y on microstructure and mechanical properties of as-cast magnesium alloy

Zhang Xudong¹, Suo Zhuanxia², Wei Boxin², Wang Xin³, Cao Guojian²

1. XCMG earth moving machinery business unit material preparation factory, Xuzhou Jiangsu 221000, China;
2. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin Heilongjiang 150040, China;
3. School of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin Heilongjiang 150040, China

Received:2020-03-17 Online:2020-10-25 Published:2020-12-29

摘要/Abstract

摘要： 采用熔炼工艺制备了Mg-2.0Zn-0.2Ca与Mg-2.0Zn-0.2Ca-2Y合金,研究了两种合金的铸态组织及力学性能。结果表明,Y元素的添加细化了Mg-2.0Zn-0.2C合金的铸态组织。Mg-2.0Zn-0.2Ca合金主要由α-Mg与少量Mg₇Zn₃相组成,添加2wt%的Y后,改变了Zn在Mg基体中的固溶度,降低了其固溶强化效果,同时组织中形成了I相和W相。添加Y元素后,合金的规定塑性延伸强度升高,从41.0 MPa升高到50.6 MPa;伸长率降低,从12.6%降低到4.0%。

关键词: Mg合金, Y元素, 铸态组织, 力学性能

Abstract: Mg-2.0Zn-0.2Ca and Mg-2.0Zn-0.2Ca-2Y alloys were prepared by melting. The as-cast microstructure and mechanical properties of the two alloys were investigated. The results show that the as-cast microstructure of Mg-2.0Zn-0.2Ca can be refined by addition of Y element. Mg-2.0Zn-0.2Ca alloy is mainly composed of α-Mg and a small amount of Mg₇Zn₃. The solid solubility of Zn in Mg matrix decreases with the addition of 2wt% Y, which reduces the effect of solid solution strengthening. At the same time, I phase and W phase form in the alloy. With the addition of Y, the yield strength of the alloy increases from 41.0 MPa to 50.6 MPa and the elongation decreases from 12.6% to 4.0%.

Key words: Mg alloy, Y element, as-cast microstructure, mechanical properties

中图分类号:

TB333

张旭东, 索转霞, 魏博鑫, 王辛, 曹国剑. 稀土Y元素对铸态镁合金组织与力学性能的影响[J]. 金属热处理, 2020, 45(10): 171-174.

Zhang Xudong, Suo Zhuanxia, Wei Boxin, Wang Xin, Cao Guojian. Effect of RE element Y on microstructure and mechanical properties of as-cast magnesium alloy[J]. Heat Treatment of Metals, 2020, 45(10): 171-174.

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稀土Y元素对铸态镁合金组织与力学性能的影响

Effect of RE element Y on microstructure and mechanical properties of as-cast magnesium alloy

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