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

被引：20

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

页码：367 / 370

页数：4

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