Grain refining performance of Al-B master alloys with different microstructures on Al-7Si alloy

被引：19
|
作者：
Wang, Tongmin [1 ]
Chen, Zongning [1 ]
Fu, Hongwang [1 ]
Li, Tingju [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China
来源：
METALS AND MATERIALS INTERNATIONAL | 2013年 / 19卷 / 02期
基金：
中国国家自然科学基金;
关键词：
alloys; cast; microstructure; solidification; scanning electron microscopy; TI-C; REFINEMENT; ALUMINUM; MECHANISM; NUCLEANT;
D O I：
10.1007/s12540-013-2012-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The improved halide salt route has been employed to produce Al-3B master alloys with different microstructures. The micro-structural features of AlB2 particles exhibited different impacts on the grain refining response of Al-7Si alloy, evolving with the holding time after inoculation. Large blocky AlB2 particles suffer from an intense fading effect while strip-like particles are not effective enough at the 0.005 wt% B addition level. Among the various Al-3B master alloys, sample 1 containing fine, blocky AlB2 particles was revealed to be the most efficient in refining Al-7Si alloy. With inoculation of only 0.005%B of such alloy, the final grain size of Al-7Si alloy can reach 238 mu m. Its grain refining efficiency was more or less retained for holding times up to 60 min.
引用
收藏
页码：367 / 370
页数：4
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