| TiB2/Al-Si-Mg-Er复合材料的组织与性能 |
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| 引用本文： | 杨子安,相志磊,陈子勇,任伟敏,马小昭.TiB2/Al-Si-Mg-Er复合材料的组织与性能[J].金属热处理,2020,45(12):142-148. |
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| 作者姓名： | 杨子安 相志磊 陈子勇 任伟敏 马小昭 |
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| 作者单位： | 北京工业大学 材料科学与工程学院, 北京 100124 |
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| 摘 要： | 采用重熔稀释法制备了Al-7Si-0.5Mg-0.1Er和0.5TiB2/Al-7Si-0.5Mg-0.1Er合金,研究了TiB2颗粒增强Al-Si-Mg-Er复合材料的组织性能。结果表明,复合材料铸态组织主要由α-Al基体、共晶Si相和TiB2颗粒组成。TiB2粒子的加入使Al-7Si-0.5Mg-0.1Er合金二次枝晶间距减小了7.1 μm。抗拉强度达到217.53 MPa,较Al-7Si-0.5Mg-0.1Er合金提升了12.1 %。TiB2/Al-Si-Mg-Er复合材料的最优T6热处理工艺为530 ℃×12 h固溶+160 ℃×7 h时效,经该工艺处理后,TiB2/Al-Si-Mg-Er复合材料抗拉强度达到319.49 MPa,相比热处理前提高了46.9%,相比Al-7Si-0.5Mg-0.1Er合金提高了5.9%;屈服强度达到266.75 MPa,相比热处理前提高了106.4%,相比Al-7Si-0.5Mg-0.1Er合金提高了14.9%。复合材料抗拉强度的提升主要源于TiB2颗粒加入后产生的晶粒细化、变质和热处理强化。
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| 关 键 词： | Al-Si-Mg-Er合金 TiB2颗粒 复合材料 热处理 组织 力学性能 |
| 收稿时间： | 2020-07-06 |
Microstructure and properties of TiB2/Al-Si-Mg-Er composite |
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| Yang Zi&#x,an,Xiang Zhilei,Chen Ziyong,Ren Weimin,Ma Xiaozhao.Microstructure and properties of TiB2/Al-Si-Mg-Er composite[J].Heat Treatment of Metals,2020,45(12):142-148. |
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| Authors: | Yang Zi&#x an Xiang Zhilei Chen Ziyong Ren Weimin Ma Xiaozhao |
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| Affiliation: | College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China |
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| Abstract: | Al-7Si-0.5Mg-0.1Er and 0.5TiB2/Al-7Si-0.5Mg-0.1Er alloys were prepared by remelting and dilution method, and the microstructure and properties of TiB2 particle reinforced Al-Si-Mg-Er composites were studied. The results show that the as-cast microstructure of the composites is mainly composed of α-Al matrix, eutectic Si phase and TiB2 particles. The addition of TiB2 particles reduces the secondary dendrite spacing of the Al-7Si-0.5Mg-0.1Er alloy by 7.1 μm. The tensile strength reaches 217.53 MPa, which is 12.1% higher than that of the Al-7Si-0.5Mg-0.1Er alloy. The optimal T6 heat treatment process for the TiB2/Al-Si-Mg-Er composite is 530 ℃×12 h solid solution +160 ℃×7 h aging. After this process, the tensile strength of the TiB2 /Al-Si-Mg-Er composite reaches 319.49 MPa, which is 46.9% higher than that before heat treatment, and 5.9% higher than that of the Al-7Si-0.5Mg-0.1Er alloy. The yield strength reaches 266.75 MPa, which is increased by 106.4% compared with that before heat treatment and is 14.9% higher than that of the Al-7Si-0.5Mg-0.1Er alloy. The improvement of the tensile strength of the composite materials mainly comes from the grain refinement, modification and heat treatment strengthening of TiB2 particles. |
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| Keywords: | Al-Si-Mg-Er alloy TiB2 particles composites heat treatment microstructure mechanical properties |
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