Refining Mechanism of Al-Ti-C Grain Refiner

Li Yinglong Cao Furong Shi Lu Wen Jinglin

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Refining Mechanism of Al-Ti-C Grain Refiner
Issue 8, Pages: 451-453(2005)
Published： 2005 ，
DOI：

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[1]李英龙,曹富荣,石路,温景林.Al-Ti-C晶粒细化剂的细化机理试验研究[J].特种铸造及有色合金,2005(08):451-453+445.

Li Yinglong Cao Furong Shi Lu Wen Jinglin. Refining Mechanism of Al-Ti-C Grain Refiner. [J]. Special Casting & Nonferrous Alloys (8):451-453(2005)
[1]李英龙,曹富荣,石路,温景林.Al-Ti-C晶粒细化剂的细化机理试验研究[J].特种铸造及有色合金,2005(08):451-453+445. DOI：

Li Yinglong Cao Furong Shi Lu Wen Jinglin. Refining Mechanism of Al-Ti-C Grain Refiner. [J]. Special Casting & Nonferrous Alloys (8):451-453(2005) DOI：

摘要

通过SEM分析手段

研究了液固反应法制备的Al-Ti-C晶粒细化剂的组织特征

并通过不同Ti/C的Al-Ti-C晶粒细化剂的细化效果比较

确定Al-Ti-C合金的最佳成分范围;分析了Al熔体凝固过程的形核过冷度、以及α-Al形核与长大驱动力

探讨了凝固过程中α-Al细化机制。结果表明:细化效果决定于TiC的数量、形核活性及晶粒生长限制因子的综合作用。

Abstract

Microstructure of Al-Ti-C master alloy prepared by liquid-solid reaction method were observed through SEM analysis

and the optimized scope of chemical composition was determined through the comparison of the refining effects of Al-Ti-C master alloy with various ration of Ti to C.The nucleation undercooling rate of aluminum melt

the driving force of nucleation and growth and refining mechanism of alpha aluminum phase during solidification were analyzed.The results showed that refining effects is dependent on the comprehensive role among TiC quantity

nucleation activity and the restrained factors for grain growth.