原位自生Mg<sub>2</sub>Si/Al复合材料的组织与性能研究

武洋; 陈淑英; 周岐; 邵秉川

doi:10.15980/j.tzzz.2014.11.012

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原位自生Mg₂Si/Al复合材料的组织与性能研究
Microstructure and Properties of In-Situ Mg₂Si/Al Composites
2014年34卷第11期页码：1158-1161
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.11.012

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[1]武洋,陈淑英,周岐,邵秉川.原位自生Mg_2Si/Al复合材料的组织与性能研究[J].特种铸造及有色合金,2014,34(11):1158-1161.

Wu Yang, Chen Shuying, Zhou Qi, et al. Microstructure and Properties of In-Situ Mg₂Si/Al Composites[J]. Special Casting & Nonferrous Alloys, 2014,34(11):1158-1161.
[1]武洋,陈淑英,周岐,邵秉川.原位自生Mg_2Si/Al复合材料的组织与性能研究[J].特种铸造及有色合金,2014,34(11):1158-1161. DOI： 10.15980/j.tzzz.2014.11.012.

Wu Yang, Chen Shuying, Zhou Qi, et al. Microstructure and Properties of In-Situ Mg₂Si/Al Composites[J]. Special Casting & Nonferrous Alloys, 2014,34(11):1158-1161. DOI： 10.15980/j.tzzz.2014.11.012.

摘要

研究了混合RE变质

混合RE+P变质以及熔体过热对18Mg2Si/Al复合材料组织与性能的影响。结果表明

未变质条件下

18Mg2Si/Al复合材料中初生Mg2Si为粗大的多角状或树枝状

平均晶粒尺寸为65.3μm

而且尺寸分布不均匀。经过3种不同的方法处理后

复合材料中初生Mg2Si得到了不同程度的细化

其中混合RE+P复合变质使初生Mg2Si尺寸达到15μm

共晶Mg2Si呈颗粒状。过热处理后初生Mg2Si达到了13μm

共晶Mg2Si呈絮状。原位自生18Mg2Si/Al复合材料的抗拉强度和伸长率得到了不同程度的提高。

Abstract

Effects of mischmetal modification

misch metal plus phosphorus modification and melt superheating treatment on microstructure and properties of in-situ 18Mg2Si/Al composites were investigated.The results show that the primary Mg2 Si in 18Mg2Si/Al composites presents coarse polygonal shapes or dendritic shapes with the average grain size of 65.3μm and uneven distribution in condition of unmodification.After modification treatment

the primary Mg2 Si is refined to some extent

where the size of primary Mg2 Si reaches 15μm after mischmetal plus phosphorus modification

and the eutectic Mg2 Si becomes spheroidization.In addition

the size of primary Mg2 Si reaches 13μm after melt superheating treatment

and the eutectic Mg2 Si exhibits sinewy.After mischmetal modification

misch metal plus phosphorus modification

and melt superheating treatment

the tensile strength and elongation of the insitu composites are improved to some extent.