Sr对高铁Al-Si合金组织和性能的影响

范晓明; 刘建方; 刘敏强; 魏瑛; 邓学林; 喻尚钟

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Sr对高铁Al-Si合金组织和性能的影响
Effects of Strontium on Microstructure and Mechanical Properties of Al-12 Si-1.2Fe Alloy
2007年第11期页码：891-893
纸质出版日期： 2007 ，
DOI：

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[1]范晓明,刘建方,刘敏强,魏瑛,邓学林,喻尚钟.Sr对高铁Al-Si合金组织和性能的影响[J].特种铸造及有色合金,2007(11):891-893+820.

Fan Xiaoming1, Liu Jianfang1, Liu Minqiang1, et al. Effects of Strontium on Microstructure and Mechanical Properties of Al-12 Si-1.2Fe Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(11):891-893.
[1]范晓明,刘建方,刘敏强,魏瑛,邓学林,喻尚钟.Sr对高铁Al-Si合金组织和性能的影响[J].特种铸造及有色合金,2007(11):891-893+820. DOI：

Fan Xiaoming1, Liu Jianfang1, Liu Minqiang1, et al. Effects of Strontium on Microstructure and Mechanical Properties of Al-12 Si-1.2Fe Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(11):891-893. DOI：

摘要

研究了Sr元素（加入量分别为0.03%、0.06%、0.09%、0.12%和0.18%）对含Fe量为1.2%的ZL102合金的组织和性能的影响。研究发现

随着Sr元素的加入

合金中粗大的针状Fe相开始出现断裂分叉现象

同时针状Fe相的长度也随Sr元素加入量的增加而减小

但Sr对Fe相的针状形貌没有明显改变。随着Sr元素加入量逐渐增加

合金的抗拉强度和伸长率均呈现出先增后减的变化趋势。当Sr元素加入量达到0.12%时

合金材料的综合力学性能最佳。

Abstract

Fe can seriously deteriorate the mechanical properties of as-cast Al-Si alloy due to its needle-like morphology in microstructure of the alloy.The effects of various Sr content

such as 0.03%

0.06%

0.09%

0.12% and 0.18% addition

on the microstructure and mechanical properties of ZL102 alloy containing 1.2Fe have been described.It was found that the coarse needle-like iron phase begins to present the phenomena of broken and dissolution with the addition of the Sr.Meanwhile

the lengths of the needle-like iron phase can be decreased with the increase of Sr addition.However

the iron phase morphology can only be slightly changed by Sr element.Both tensile strength and elongation of the alloy show the tendency of first rise and then drops with Sr content increase.The optimized mechanical properties can be obtained with 1.2% Sr addition.