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投稿时间：2023-09-25 修订日期：2023-11-03
投稿时间：2023-09-25 修订日期：2023-11-03
中文摘要: 本文在Al7Si0.3Mg合金含0.3%Er的基础上研究了不同Zr含量对合金组织及力学性能的影响。研究结果表明，在添加Zr元素之后，Zr与Er形成了第二相颗粒Al3Er和Al3Zr，这些第二相粒子在铝液凝固过程中起到双重形核和细化作用，显著细化α-Al和共晶Si的分枝，提高了合金的力学性能。当Zr含量为0.2%时，其抗拉强度达到了182MPa，延伸率为6.4%，较未添加Zr元素的合金抗拉强度和延伸率分别提高了16.7%和33.3%。
Abstract:In this paper, the effects of different Zr contents on the organization and mechanical properties of Al7Si0.3Mg alloy containing 0.3% Er were investigated. The results show that the addition of Zr elements not only significantly refines α-Al, but also refines the branching of eutectic Si and improves the mechanical properties of the alloy, which is due to the formation of second-phase particles Al3Er and Al3Zr by Zr and Er, and these second-phase particles play a double nucleation and refinement role in the solidification process of aluminum liquid. When the Zr content was 0.2%, the tensile strength reached 288 MPa and elongation was 6.4%, which increased the tensile strength and elongation by 8.6% and 33.3%, respectively, relative to the alloy without the addition of Zr elements.
文章编号：YSJSGC20230570 中图分类号： 文献标志码：
基金项目:云南省重大科技专项计划(202102AB080015、202102AB080004、202202AB080006)。
引用文本：
李玉章,孙彦华,吉全鑫,冯炜光,李雨耕,包稚群.Zr含量对Er变质Al7Si0.3Mg合金组织及力学性能的影响[1][J].有色金属工程,2024,(3):.
LI Yuzhang,SUN Yanhua,JI Quanxin,FENG Weiguang,LI Yugeng,BAOZHIQUN.LI Yuzhang1,3, SUN Yanhua1,3, JI Quanxin2, FENG Weiguang1,3*, LI Yugeng1,3, BAO Zhiqun1,3[J].NONFERROUS METALS ENGINEERING,2024,(3):.
李玉章,孙彦华,吉全鑫,冯炜光,李雨耕,包稚群.Zr含量对Er变质Al7Si0.3Mg合金组织及力学性能的影响[1][J].有色金属工程,2024,(3):.
LI Yuzhang,SUN Yanhua,JI Quanxin,FENG Weiguang,LI Yugeng,BAOZHIQUN.LI Yuzhang1,3, SUN Yanhua1,3, JI Quanxin2, FENG Weiguang1,3*, LI Yugeng1,3, BAO Zhiqun1,3[J].NONFERROUS METALS ENGINEERING,2024,(3):.
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