CeO尺寸对Al-Ti-C合金微观结构、合成机理及细化性能的影响

Effect of CeO Size on Microstructure, Synthesis Mechanism and Refining Performance of Al-Ti-C Alloy.

作者信息

Ma Yanli, Chen Taili, Gou Lumin, Ding Wanwu

机构信息

Technology Center, Jiuquan Iron and Steel (Group) Co., Ltd., Jiayuguan 735100, China.

School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China.

出版信息

Materials (Basel). 2021 Nov 9;14(22):6739. doi: 10.3390/ma14226739.

DOI:10.3390/ma14226739

PMID:34832141

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8617894/

Abstract

The effects of CeO size on the microstructure and synthesis mechanism of Al-Ti-C alloy were investigated using a quenching experiment method. A scanning calorimetry experiment was used to investigate the synthesis mechanism of TiC, the aluminum melt in situ reaction was carried out to synthesize master alloys and its refining performance was estimated. The results show that the Al-Ti-C-Ce system is mainly composed of α-Al, AlTi, TiC and TiAlCe. The addition of CeO obviously speeds up the progress of the reaction, reduces the size of AlTi and TiC and lowers the formation temperature of second-phase particles. When the size of CeO is 2-4 μm, the promotion effect on the system is most obvious. The smaller the size of CeO, the smaller the size of AlTi and TiC and the lower the formation temperature. Al-Ti-C-Ce master alloy has a significant refinement effect on commercial pure aluminum. When the CeO size is 2-4 μm, the grain size of commercial pure aluminum is refined to 227 μm by Al-Ti-C-Ce master alloy.

摘要

采用淬火实验方法研究了CeO尺寸对Al-Ti-C合金微观结构及合成机理的影响。利用扫描量热实验研究了TiC的合成机理，进行了铝熔体原位反应以合成中间合金并评估其细化性能。结果表明，Al-Ti-C-Ce体系主要由α-Al、AlTi、TiC和TiAlCe组成。CeO的加入明显加快了反应进程，减小了AlTi和TiC的尺寸，并降低了第二相粒子的形成温度。当CeO尺寸为2-4μm时，对该体系的促进作用最为明显。CeO尺寸越小，AlTi和TiC尺寸越小，形成温度越低。Al-Ti-C-Ce中间合金对工业纯铝具有显著的细化效果。当CeO尺寸为2-4μm时，Al-Ti-C-Ce中间合金可将工业纯铝的晶粒尺寸细化至227μm。