| 细晶Mg-Al-Ti-C中间合金的制备及其对AZ91D组织和性能的影响 |
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| 引用本文： | 孟宏杰,董天顺,叶校瑛,刘利,王拓.细晶Mg-Al-Ti-C中间合金的制备及其对AZ91D组织和性能的影响[J].有色金属(冶炼部分),2019(2):55-59. |
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| 作者姓名： | 孟宏杰 董天顺 叶校瑛 刘利 王拓 |
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| 作者单位： | 唐山工业职业技术学院机械工程系;河北工业大学材料科学与工程学院 |
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| 基金项目： | 河北省高等学校科学技术研究项目(ZD2014040) |
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| 摘 要： | 采用两步法+铜模喷铸的方式制备具有颗粒增强和细晶强化作用的Mg-Al-Ti-C中间合金,并研究了其对AZ91D组织和性能的影响。通过OM、SEM、XRD、硬度及拉伸试验对中间合金和AZ91D的组织形貌和力学性能进行分析。结果表明,两步法制备得到了Mg-Al-Ti-C中间合金,经过铜模喷铸后,TiC颗粒尺寸大幅度减小,且弥散分布于Mg-Al-Ti-C中间合金中;用该细晶Mg-Al-Ti-C中间合金处理AZ91D,后者的抗拉强度提高了19.8%,硬度提高了64.9%;TiC颗粒既有颗粒增强作用,也能作为AZ91D凝固时的异质形核核心,起到细晶强化作用。
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| 关 键 词： | 两步法 铜模喷铸 Mg-Al-Ti-C中间合金 AZ91D合金 |
| 收稿时间： | 2018/11/4 0:00:00 |
| 修稿时间： | 2018/11/10 0:00:00 |
Preparation of Fine-grained Mg-Al-Ti-C Master Alloy and Its Effect on Microstructure and Properties of AZ91D Alloy |
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| Meng Hong-jie,Dong Tian-shun,YE Xiaoying,LIU Li and Wang Tuo.Preparation of Fine-grained Mg-Al-Ti-C Master Alloy and Its Effect on Microstructure and Properties of AZ91D Alloy[J].Nonferrous Metals(Extractive Metallurgy),2019(2):55-59. |
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| Authors: | Meng Hong-jie Dong Tian-shun YE Xiaoying LIU Li and Wang Tuo |
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| Affiliation: | Department of Mechanical Engineering, Tangshan Polytechnic College,,,, |
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| Abstract: | Mg-Al-Ti-C master alloy with particle reinforcement and fine crystal strengthening was prepared by two-step method and copper mold inject casting. Effects of Mg-Al-Ti-C master alloy on microstructure and properties of AZ91D were investigated by means of OM, SEM, XRD, hardness test and tensile test. The results show that Mg-Al-Ti-C master alloy was produced by two-step method, and TiC particles are dispersedly distributed in Mg-Al-Ti-C master alloy with their sizes becoming much smaller. After treatment with Mg-Al-Ti-C master alloy, tensile strength and hardness of AZ91D rise by 19.8% and 64.9% respectively. Besides particle reinforcing effect, TiC particles can also be used as heterogeneous core of AZ91D to strengthen substrate. |
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| Keywords: | two-step method copper mold inject casting Mg-Al-Ti-C master alloy AZ91D alloy |
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