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Aluminium alloy doped with strontium element and manufacturing method thereof

A manufacturing method and technology for aluminum alloys, applied in the field of aluminum-based alloys, can solve the problems of affecting the mechanical properties of castings, excessively large material grains, and unsatisfactory metallographic structure, and achieve high fatigue resistance, improve mechanical properties, and mechanical properties. high effect

Inactive Publication Date: 2012-05-30
SHANGHAI WANTAI ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of mechanical manufacturing, cast aluminum alloys are mostly used, but the current cast aluminum alloys still have too large grains of the material after the alloy solidifies, and the metallographic structure is not ideal, which affects the mechanical properties of the castings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] An aluminum alloy doped with strontium elements, including aluminum, silicon and copper, the mass percentage concentration of each component is respectively:

[0018] components Mass percentage concentration (%) silicon 10.5 copper 1.5 strontium 0.015 aluminum margin

[0019] A method for manufacturing aluminum alloys doped with strontium elements, including six steps of batching, melting, stirring, adding aluminum-strontium alloys, degassing and casting in sequence. During batching, silicon, copper, strontium and aluminum are pressed on the The ratio shown in the table is evenly mixed; when melting, heat the raw materials after the batching is completed in the furnace to a molten state; when stirring, stir the molten aluminum with a stirrer; The aluminum-strontium alloy has a mass percent concentration of strontium of 8%.

Embodiment 2

[0021] An aluminum alloy doped with strontium elements, including aluminum, silicon and copper, the mass percentage concentration of each component is respectively:

[0022] components Mass percentage concentration (%) silicon 11 copper 2.5 strontium 0.025 aluminum margin

[0023] A method for manufacturing aluminum alloys doped with strontium elements, including six steps of batching, melting, stirring, adding aluminum-strontium alloys, degassing and casting in sequence. When adding aluminum-strontium alloys, the temperature of molten aluminum is controlled at 735°C , the added aluminum-strontium alloy has a mass percent concentration of strontium of 10%. Other steps are all the same with embodiment 1.

Embodiment 3

[0025] An aluminum alloy doped with strontium elements, including aluminum, silicon and copper, the mass percentage concentration of each component is respectively:

[0026] components Mass percentage concentration (%) silicon 12 copper 3.5 strontium 0.035 aluminum margin

[0027] A method for manufacturing aluminum alloys doped with strontium elements, including six steps of batching, melting, stirring, adding aluminum-strontium alloys, degassing and casting in sequence. When adding aluminum-strontium alloys, the temperature of molten aluminum is controlled at 750°C , the added aluminum-strontium alloy has a mass percent concentration of strontium of 12%. Other steps are all the same with embodiment 1.

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Abstract

The invention relates to the field of aluminium-based alloy with silicon as a secondary main component, specifically to an aluminium-silicon-copper alloy mixed with strontium element and a manufacturing method thereof. The aluminium-silicon-copper alloy mixed with strontium element contains aluminium, silicon, copper, manganese and magnesium, and is characterized by containing strontium as well, wherein the concentration (by mass percent) of strontium is 0.015-0.035%. The manufacturing method of the aluminium alloy mixed with strontium element comprises the following five steps in order: proportioning, fusing, stirring, degassing and casting. The manufacturing method is characterized by comprising the step of adding an aluminium-strontium alloy as well. Addition of the aluminium-strontium alloy is carried out between stirring and degassing. When adding the aluminium-strontium alloy, the temperature of molten aluminum is controlled between 72 DEG C and 750 DEG C. The invention has advantages of casting grain refinement and high mechanical property.

Description

technical field [0001] The invention relates to the field of aluminum-based alloys with silicon as the secondary main component, in particular to an aluminum alloy doped with strontium and a manufacturing method thereof. Background technique [0002] Aluminum alloys are widely used in aviation and automobile fields due to their light weight and corrosion resistance. In the field of mechanical manufacturing, cast aluminum alloys are mostly used, but the current cast aluminum alloys still have excessively large grains of the material after the alloy solidifies, and the metallographic structure is not ideal, which affects the mechanical properties of the castings. Contents of the invention [0003] In order to overcome the defects of the prior art and provide a cast aluminum alloy with fast shrinkage speed and high casting mechanical properties, the invention discloses an aluminum alloy doped with strontium element and a manufacturing method thereof. [0004] The present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02
Inventor 徐宏应伟勇
Owner SHANGHAI WANTAI ALUMINUM
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