| 稀土Y元素对铸态镁合金组织与力学性能的影响 |
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| 引用本文： | 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. |
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| 作者姓名： | 张旭东 索转霞 魏博鑫 王辛 曹国剑 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金;哈尔滨市应用技术研究与开发项目 |
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| 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%。
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| 关 键 词： | Mg合金 Y元素 铸态组织 力学性能 |
| 收稿时间： | 2020-03-17 |
Effect of RE element Y on microstructure and mechanical properties of as-cast magnesium alloy |
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| 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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| Authors: | Zhang Xudong Suo Zhuanxia Wei Boxin Wang Xin Cao Guojian |
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| Affiliation: | 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 |
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| 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%. |
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| Keywords: | Mg alloy Y element as-cast microstructure mechanical properties |
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