A357 aluminum alloy material containing alterant Sr and Ti and preparation method thereof

A technology of aluminum alloy materials and modifiers, which is applied in the field of A357 aluminum alloy materials and its preparation, can solve the problems of weakening the effect of Sr modification, and achieve the effect of reducing heterogeneous nucleation

Inactive Publication Date: 2016-04-27
温兴琴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The research of Sigworth et al. believes that when Ti, B, and Sr coexist in the Al-Si alloy melt, the modification effect of Sr is weakened.

Method used

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  • A357 aluminum alloy material containing alterant Sr and Ti and preparation method thereof
  • A357 aluminum alloy material containing alterant Sr and Ti and preparation method thereof
  • A357 aluminum alloy material containing alterant Sr and Ti and preparation method thereof

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Experimental program
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Embodiment Construction

[0007] The alloy used in the test is A357 alloy prefabricated ingot, and its chemical composition is shown in Table 1. A graphite crucible was used to heat and melt the A357 alloy prefabricated ingot in an 8kW resistance furnace. During the grain refinement treatment, the alloy ingot is heated and melted, and then the Al-5%Ti master alloy is added, refined and degassed when the temperature is raised to 740 degrees, and poured after standing. During metamorphic treatment, degassing is carried out twice. The alloy ingot is heated and melted and the temperature is raised to 740 degrees for the first refining degassing. After adding Al-10%Sr master alloy, the temperature is raised to 740e for the second refining degassing. After standing pouring. When grain refinement and modification are carried out at the same time, degassing is performed twice. After the alloy ingot is heated and melted, the Al-5%Ti master alloy is added, and when the temperature is raised to 740 degrees, the...

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Abstract

The invention discloses an A357 aluminum alloy material containing alterant Sr and Ti. The A357 aluminum alloy material is characterized by comprising the following raw materials in percentage by mass: 6-7 of Si, 0.4-0.6 of Mg, less than 0.05 of Cu, 0.12 of Ti, 0.01-0.015 of Sr, 0.2 of Fe, and the balance of Al.

Description

technical field [0001] The invention relates to an A357 aluminum alloy material containing modifiers Sr and Ti and a preparation method thereof. Background technique [0002] Hypoeutectic Al-Si casting alloys are widely used in aviation, aerospace, automobile, machinery industry and other fields because of their excellent casting characteristics and mechanical properties. Al-Si-Mg is one of the most widely used alloys. The addition of Mg in this alloy can form Mg2Si dispersion strengthening phase through solution treatment and aging treatment, and further improve the mechanical properties of the alloy. Effectively reducing the grain size and improving the morphology of A-Al dendrites and eutectic Si in the alloy have a great influence on its mechanical properties, so the alloy must be subjected to grain refinement and modification in actual casting production. So as to achieve the purpose of improving the mechanical properties of the alloy. There have been a large number o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03
Inventor 温兴琴
Owner 温兴琴
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