钛对AlSi7Mg0.3合金力学性能的影响

王汝耀; 鲁薇华

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钛对AlSi7Mg0.3合金力学性能的影响
The Effect of Titanium on the Mechanical Properties of AlSi7Mg0.3 Alloy
1999年第S1期
纸质出版日期： 1999 ，
DOI：

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[1]王汝耀,鲁薇华.钛对AlSi7Mg0.3合金力学性能的影响[J].特种铸造及有色合金,1999(S1):20-21.

Wang RuyaoLu Weihua. The Effect of Titanium on the Mechanical Properties of AlSi7Mg0.3 Alloy[J]. Special Casting & Nonferrous Alloys, 1999,(S1).
[1]王汝耀,鲁薇华.钛对AlSi7Mg0.3合金力学性能的影响[J].特种铸造及有色合金,1999(S1):20-21. DOI：

Wang RuyaoLu Weihua. The Effect of Titanium on the Mechanical Properties of AlSi7Mg0.3 Alloy[J]. Special Casting & Nonferrous Alloys, 1999,(S1). DOI：

摘要

研究了钛对ＡｌＳｉ７Ｍｇ０．３合金金相组织和力学性能的影响。钛量超过０．１２％，铝合金晶粒不再细化，而冲击韧度和伸长率急剧下降，抗拉强度缓慢上升，硬度变化甚微。力学性能如此变化可能是出现针状钛相造成的。ＡｌＳｉ７Ｍｇ０．３合金最佳钛量应在０．０８％～０．１０％范围内。此时，铁含量接近０．１８％，合金仍保持较高的冲击韧度和塑性

Abstract

The effect of titanium level on the microstructure and mechanical properties of AlSi7Mg0.3 alloy has been studied. As the titanium level is more than 0.12%

the elongation and impact toughness of the alloy drop rapidly

and the ultimate tensile strength rises slowly with no change in hardness and grain size. The change in mechanical properties are related to the appearance of titanium phase in needlelike form.The optimum level of titanium in AlSi7Mg0.3 alloy ranges over 0.08%￣0.10%

in which

as the iron level is up to 0.18%

the impact strenght and elongation are satisfactory.