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有色金属(冶炼部分):2019,(2):55-59
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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
孟宏杰,董天顺,叶校瑛,刘利,王拓
(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,唐山工业职业技术学院,河北工业大学 材料科学与工程学院,河北工业大学 材料科学与工程学院)
Preparation of Fine-grained Mg-Al-Ti-C Master Alloy and Its Effect on Microstructure and Properties of AZ91D Alloy
Meng Hong-jie,Dong Tian-shun,YE Xiaoying,LIU Li and Wang Tuo
(Department of Mechanical Engineering, Tangshan Polytechnic College,,,,)
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投稿时间:2018-11-04     修订日期:2018-11-10     录用日期:2018-11-12     网络发布日期:2019-01-24
中文摘要: 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。
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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基金项目:河北省高等学校科学技术研究项目(ZD2014040)
引用文本:
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.
Meng Hong-jie,Dong Tian-shun,YE Xiaoying,LIU Li,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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