Ferrocene-enhanced high-performance aluminum alloy material and preparation method thereof

Abstract

The invention discloses a ferrocene-enhanced high-performance aluminum alloy material comprising the alloy components in percentage by weight: 6.5-10% of Si, at most 0.45% of Mg, at most 0.2% of Ti, at most 0.2% of Mn, at most 0.5% of Cu, at most 0.3% of Zn, at most 0.01% of Sn, at most 0.05% of Pb, at most 0.1% of Be, ferrocene modifier and the balance of Al and unavoidable trace impurities, wherein the ferrocene modifier is 1ppm to 2.0% of the total quantity of furnace charge, the content of single impurity element is less than or equal to 0.1%, and the total content of impurity elements is less than or equal to 0.5%. The aluminum alloy material disclosed by the invention has a fine grain structure and higher purity compared with a common aluminum alloy.

Description

technical field [0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to a ferrocene-strengthened high-performance aluminum alloy material and a preparation method thereof. Background technique [0002] As we all know, iron is a major harmful impurity in cast aluminum alloys. Its harmful effect is that it forms a microstructure that can damage the matrix in the alloy, so its content is generally limited. The solubility of iron in Al is extremely small. During the liquid solidification process, Fe crystallizes earlier than the Al-rich α (Al) solid solution, and exists in the form of needle-like or flaky brittle β (Al9Si2Fe2) equal primary crystal compounds, needle-like or flaky The brittle β (Al9Si2Fe2) phase elongates with the increase of iron content, which plays a role in splitting the matrix and increasing the source of stress concentration, which seriously reduces the mechanical properties of aluminum alloy. [0003] ...

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Problems solved by technology

[0003]Because the thick acicular or flaky β (Al9Si2Fe2) phase is the leading phase in the solidification process of metal liquid, it hinders the flow of liquid and metal in the feeding channel, It will cause the increase of the porosity of the hot spot, and the influence on the Al-Si series aluminum alloy. The decrease of the mechanical properties is obvious with the increase of the iron content.

[0004] It is common to add a small amount of Mn to the cast aluminum alloy, which can transform the acicular or flaky brittle β (Al9Si2Fe2) phase into a skeletal AlMnFeSi phase, thereby To reduce the harmful effects of impurity Fe, some data believe that the Mn / Fe ratio is the best when it is 0.7~0.8, but the excessive addition of Mn, that is, when the manganese content reaches 1%, can increase the brittleness of the aluminum alloy and reduce the strength at room temperature. Therefore, the use of manganese to solve the harm of Fe cannot be completely, and with the increase of manganese content, it will have a harmful effect on the alloy

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