新型Al-Ti-B-RE中间合金的合成及其细化性能的研究（英文）

发布时间：2018-01-28 22:34

本文关键词： 熔配法 Al-Ti-B-RE中间合金第二相粒子细晶粒度级别　出处：《稀有金属材料与工程》2015年12期 　论文类型：期刊论文

【摘要】：为优化铝中间合金细化剂的组织,提升细化性能,采用熔配法工艺合成新型Al-Ti-B-RE中间合金晶粒细化剂,合成反应基于热力学和动力学分析是可能的、存在的、自发向右进行,在适当的工艺条件下,在基体中可生成均匀弥散分布的第二相Al_3Ti、TiB_2、Ti_2Al_(20)RE等粒子。采用X射线衍射(XRD)、扫描电镜(SEM)、光学显微镜(OM)和力学拉伸试验等分析方法对所合成材料的微观组织、细化效果及力学性能进行了表征。细化试验表明:自制的Al-5Ti-1B-1RE中间合金细化工业纯铝时,其平均晶粒尺寸小于150μm到达细晶粒度级别。拉伸试验表明:工业纯铝中加入0.2%自制的Al-5Ti-1B-1RE中间合金晶粒细化剂后有更优的机械性能,与未细化工业纯铝相比,抗拉强度提高了28.39 MPa,延伸率增加了29.97%,其性能明显优于某国产的Al-5Ti-1B丝中间合金细化剂。
[Abstract]:In order to optimize the microstructure of aluminum master alloy refiner and improve the refining performance, a new Al-Ti-B-RE master alloy grain refiner was synthesized by melting process. The synthesis reaction is possible based on thermodynamics and kinetic analysis and exists spontaneously to the right. Under the appropriate process conditions the second phase Al_3Ti with uniform dispersion can be formed in the matrix. Particles such as TiB _ S _ 2T _ 2AL _ T _ 2AL _ S _ e, etc., using X-ray diffraction (XRDX), scanning electron microscopy (SEM). Optical microscope (OM) and mechanical tensile test were used to analyze the microstructure of the synthesized materials. The refining effect and mechanical properties were characterized. The refinement test showed that the self-made Al-5Ti-1B-1RE master alloy was used to refine industrial pure aluminum. The average grain size is less than 150 渭 m. The tensile test shows that:. The addition of 0.2% self-made Al-5Ti-1B-1RE master alloy grain refiner into industrial pure aluminum has better mechanical properties. The tensile strength and elongation increased by 28.39 MPa and 29.97, respectively, compared with that of commercial pure aluminum without refining, and its properties were obviously superior to those of a home-made Al-5Ti-1B wire master alloy refiner.
【作者单位】：江苏大学;宿迁学院;
【基金】：Natural Science Foundation of Jiangsu Province of China(BK2011524);Natural Science Foundation of Education Department of Jiangsu Province of China(12KJD430002) Project Supported by Graduate Research and Innovation of Jiangsu University in 2014,Jiangsu Province,China(KYXX_0001)
【分类号】：TG146.21
【正文快照】： With wide applications of aluminum in the newly-refining effects on aluminum alloys(high strength alloys)developed technologies,there are more and more needs forcontaining Zr,Cr and Mn elements are weakened and eventhe microstructures and the mechanical

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