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| 含Sn稀土镁合金成分的正交设计研究 |
| Orthogonal Design on Composition of Rare-earth Magnesium Alloys Containing Sn |
| Received:April 27, 2023 |
| DOI：10.3969/j.issn.1674-6457.2023.09.005 |
| 中文关键词: 稀土镁合金 正交设计 合金成分优选 极差分析 力学性能 |
| 英文关键词: rare-earth magnesium alloy orthogonal design alloy composition optimization range analysis mechanical properties |
| 基金项目: |
| Author Name | Affiliation | | WANG Fu-lin | Shenyang Research Institute of Foundry Co., Ltd., CAM, Shenyang 110022, China
National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China | | LI Yu-fei | Shenyang Research Institute of Foundry Co., Ltd., CAM, Shenyang 110022, China
National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China | | LI Ze-hua | Shenyang Research Institute of Foundry Co., Ltd., CAM, Shenyang 110022, China
National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China | | XIONG Jun-jie | Shenyang Research Institute of Foundry Co., Ltd., CAM, Shenyang 110022, China
National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China | | LI Xiao | Shenyang Research Institute of Foundry Co., Ltd., CAM, Shenyang 110022, China
National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China | | CHANG Bo-wen | Shenyang Research Institute of Foundry Co., Ltd., CAM, Shenyang 110022, China
National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China | | CHE Chang | Military Representative Office of Air Force Equipment Department in Liaoyang District, Liaoning Liaoyang 111000, China | | XU Shi-jing | Military Representative Office of Air Force Equipment Department in Liaoyang District, Liaoning Liaoyang 111000, China |
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| 中文摘要: |
| 目的 为进一步扩大镁合金的应用范围，以ZM2为基础合金成分，引入Sn元素，设计一种性能优异且经济成本相对低廉的含Sn稀土镁合金。方法 采用正交试验设计方法，选取正交表L9，对Mg-Zn-Ce-Zr-Sn合金成分配比进行研究，综合考虑抗拉强度、延伸率、硬度3项指标，得出最优成分配比;对Sn元素的含量进行调控，对比分析合金组织及力学性能，验证当Sn元素的质量分数为0.2%~0.4%时，Mg-4.5Zn- 1.2Ce-0.6Zr-xSn合金的组织与性能是否最佳。结果 Mg-Ce-Zn-Zr-Sn合金的优选成分如下:Zn的质量分数为4.0%~4.5%、Ce的质量分数为1.2%~1.5%、Sn的质量分数为0.2%~0.4%。优选合金成分为Mg-(4.0~4.5) Zn- (1.2~1.5)Ce-0.6Zr-(0.2~0.4)Sn。极差分析及影响因素主次分析结果表明，新引入的Sn元素对合金的综合力学性能有着重要的影响。组织及力学性能分析结果表明，当Sn的质量分数为0.2%时，Mg-4.5Zn- 1.2Ce-0.6Zr-xSn合金具有最为优良的组织及力学性能，抗拉强度、延伸率、布氏硬度分别为212 MPa、4.5%、69.8HBW5/250。结论 优选方案的试验数据表明，利用正交试验设计得到的新型合金综合性能较好，满足ZM2合金的国家标准。 |
| 英文摘要: |
| The work aims to use ZM2 as the basic alloy composition in the work, and introduce Sn to design a Sn-containing rare-earth magnesium alloy with excellent performance and relatively low economic cost to further expand the application range of magnesium alloys. The orthogonal test design method was adopted. The orthogonal table L9 was selected to study the composition of the Mg-Zn-Ce-Zr-Sn alloy and get the optimal composition ratio with consideration of the three indicators of tensile strength, elongation and hardness. The content of Sn element was adjusted, and the microstructure and mechanical properties of the alloy were compared and analyzed, to verify whether the microstructure and properties of the Mg-4.5Zn-1.2Ce-0.6Zr-xSn alloy were the best when the content of Sn was 0.2wt.%~0.4wt.%. The optimal combination of alloying elements for Mg-Ce-Zn-Zr-Sn alloy was:4.0wt.%~4.5wt.%Zn, 1.2wt.%~1.5wt.%Ce, 0.2wt.%~0.4wt.%Sn. The preferred alloy composition was:Mg-(4.0-4.5)Zn-(1.2-1.5)Ce-0.6Zr-(0.2-0.4)Sn. Combined with the results of range analysis and primary and secondary analysis of influencing factors, it could be concluded that the newly introduced Sn element had an important impact on the comprehensive mechanical properties of the alloy. In addition, when the content of Sn was 0.2wt.%, the Mg-4.5Zn-1.2Ce-0.6Zr-xSn alloy had the best microstructure and mechanical properties. Its tensile strength, elongation and Brinell hardness reached 212 MPa, 4.5%, 69.8HBW5/250 respectively. The test data of the optimal scheme shows that the new alloy obtained by the orthogonal test design has better comprehensive performance, which meets the national standard of ZM2 alloy. |
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