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A kind of wear-resistant aluminum alloy and preparation method thereof

An aluminum alloy and intermediate alloy technology, applied in the field of aluminum alloy and its preparation, can solve the problems of high cost, unfavorable production, complicated forming process, etc., and achieve the effects of improving hardness, low cost and simple forming process

Active Publication Date: 2018-05-11
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process first needs to prepare powder, and then carry out powder compaction. The molding process is relatively complicated and the cost is high, which is not conducive to actual production.

Method used

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  • A kind of wear-resistant aluminum alloy and preparation method thereof
  • A kind of wear-resistant aluminum alloy and preparation method thereof
  • A kind of wear-resistant aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 Preparation of Al-10Si-10Mg-1.3Fe-0.3Mn-0.7Cr-0.05Sr Alloy by Ordinary Casting Method

[0039] The raw materials used in this embodiment include Fe-rich recycled aluminum alloys, pure aluminum, pure Mg, Al-20Si, Al-10Cr, Al-10Mn, and Al-10Sr master alloys. The molding method is as follows: according to the weight percentage first: Si: 10%, Mg: 10%, Fe: 1.3%, Mn: 0.3%, Sr: 0.7%, Sr: 0.05%, and the balance is Al. Among them, Fe is blended with Fe-rich recycled A356 aluminum alloy, and the insufficient amount of Al is blended with pure aluminum. Melting Fe-rich regenerated A356 aluminum alloy, pure aluminum, Al-20Si, Al-10Cr, Al-10Mn, Al-10Sr alloy at 740°C, and then adding a weighed amount to the melt when it melts to a semi-solid state After the pure Mg is completely melted, stir manually to make the components uniform, raise the temperature to 770°C, and keep it warm for 10 minutes. Refining with 2# refining agent, standing for 5 minutes, keeping the tempera...

Embodiment 2

[0042] Example 2 Preparation of Al-12Si-12Mg-0.8Fe-0.7Mn-0.3Cr-0.1Sr alloy by vibration casting method

[0043] The raw materials used in this embodiment include Fe-rich recycled aluminum alloys, pure aluminum, pure Mg, Al-20Si, Al-10Cr, Al-10Mn, and Al-10Sr master alloys. The molding method is as follows: according to the weight percentage first: Si: 12%, Mg: 12%, Fe: 0.8%, Mn: 0.7%, Cr: 0.3%, Sr: 0.1%, and the balance is Al. Among them, Fe is blended with Fe-rich recycled A356 aluminum alloy, and the insufficient amount of Al is blended with pure aluminum. Melt Fe-rich regenerated A356 aluminum alloy, pure aluminum, Al-20Si, Al-10Cr, Al-10Mn, Al-10Sr alloy at 760 °C, and add it to the melt when it melts to a semi-solid state and wrap it with tin foil paper After the weighed pure Mg is completely melted, stir manually to make the components uniform, raise the temperature to 780°C, and keep it warm for 10 minutes. Refining with 2# refining agent, let it stand for 5 minutes, ...

Embodiment 3

[0046] Example 3 Preparation of Al-12Si-10Mg-1.6Fe-0.5Mn-0.5Cr-0.1Sr alloy by vibration casting method

[0047] The raw materials used in this embodiment include Fe-rich recycled aluminum alloys, pure aluminum, pure Mg, Al-20Si, Al-10Cr, Al-10Mn, and Al-10Sr master alloys. The molding method is as follows: according to the weight percentage first: Si: 12%, Mg: 10%, Fe: 1.6%, Mn: 0.5%, Cr: 0.5%, Sr: 0.1%. Among them, Fe is blended with Fe-rich recycled A356 aluminum alloy, and the insufficient amount of Al is blended with pure aluminum. Melting Fe-rich regenerated A356 aluminum alloy, pure aluminum, Al-20Si, Al-10Cr, Al-10Mn, Al-10Sr alloy at 750°C, adding to the melt and wrapping it with tin foil paper when melting to semi-solid state After the weighed pure Mg is completely melted, stir manually to make the components uniform, raise the temperature to 775°C, and keep it warm for 10 minutes. Refining with 2# refining agent, standing for 5 minutes, keeping the temperature of t...

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Abstract

The invention discloses a wear-resistant aluminum alloy. The ware-resistant aluminum alloy comprises, by weight percentage, 10-12% of Si, 8-12% of Mg, 0.8-1.6% of Fe, 0.3-0.7% of Mn, 0.3-0.7% of Cr, 0.05-0.1% of Sr and the balance aluminum. The invention further discloses a preparation method of the wear-resistant aluminum alloy. According to the wear-resistant aluminum alloy and the preparation method of the wear-resistant aluminum alloy, Mn-Cr element complex modification is adopted, in combination with a vibrating cast technology, the Fe phase is changed into the granular shape from the long needle shape, the Fe phase morphology in the alloy is optimized, the hardness value is increased remarkably, the bearing capacity in the wear process can be improved, the wear resistance can be improved remarkably, and the tensile strength is improved remarkably.

Description

technical field [0001] The invention relates to the field of aluminum alloy and its preparation, in particular to a wear-resistant aluminum alloy and its preparation method. Background technique [0002] Aluminum alloy is the second largest metal structural material after the steel material, and the recycling and reuse of waste aluminum is an inevitable requirement for the sustainable development of society. Due to the contact and cooperation between aluminum alloy parts and Fe-based parts during use or the use of Fe-based connectors for assembly, scrap aluminum often presents high Fe content after recycling and remelting. The survey found that the mass ratio of Fe content in recycled aluminum-silicon alloys is generally It is greater than 0.6%, even as high as 2 to 3%. Fe mainly exists in the form of needle-like β-Fe phase in aluminum alloys, which severely splits the matrix and has great harm to the mechanical properties of aluminum alloys. At present, there is no particul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C21/08C22C1/03C22C1/06B22D27/08
CPCB22D27/08C22C1/026C22C1/03C22C1/06C22C21/04C22C21/08
Inventor 杜军吴桃泉许德英黄毅曹东李文芳彭旋吴春林
Owner SOUTH CHINA UNIV OF TECH
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