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Wear-resistant aluminum alloy and preparation method thereof

A technology of aluminum alloy and master alloy, applied in the field of aluminum alloy and its preparation, can solve the problems of complex forming process, high cost, unfavorable production, etc., and achieve the effect of simple forming process, increased hardness and low cost

Active Publication Date: 2017-05-24
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Wear-resistant aluminum alloy and preparation method thereof
  • Wear-resistant aluminum alloy and preparation method thereof
  • 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 secondary aluminum alloy, pure aluminum, pure Mg, Al-20Si, Al-10Cr, Al-10Mn, Al-10Sr master alloy. The forming method is as follows: first by weight percentage: 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 Al is blended with pure aluminum. Melt Fe-rich recycled A356 aluminum alloy, pure aluminum, Al-20Si, Al-10Cr, Al-10Mn, Al-10Sr alloy at 740℃, and then add the weighed alloy to the melt when it is melted to a semi-solid state Pure Mg, after all is melted, stir manually to make the composition uniform, heat up to 770°C, and keep it for 10 minutes. Use 2# refining agent for refining, let it stand for 5 minutes, keep the temperature of the molten metal at 770℃, remove the slag and pour it...

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 secondary aluminum alloy, pure aluminum, pure Mg, Al-20Si, Al-10Cr, Al-10Mn, Al-10Sr master alloy. The forming method is as follows: first by weight percentage: 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 prepared by using Fe-rich recycled A356 aluminum alloy, and the insufficient Al amount is prepared by using pure aluminum. Melt Fe-rich recycled A356 aluminum alloy, pure aluminum, Al-20Si, Al-10Cr, Al-10Mn, Al-10Sr alloy at 760℃, and then add tin foil to the melt when it is melted to a semi-solid state. After the weighed pure Mg is completely melted, manually stir to make the composition uniform, heat up to 780°C, and keep it for 10 minutes. Refine with 2# refining agent, let stand for 5 minutes, keep the temperature of the molten metal at 780℃, remove th...

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 secondary aluminum alloy, pure aluminum, pure Mg, Al-20Si, Al-10Cr, Al-10Mn, Al-10Sr master alloy. The forming method is as follows: first by weight percentage: Si: 12%, Mg: 10%, Fe: 1.6%, Mn: 0.5%, Cr: 0.5%, Sr: 0.1%. Among them, Fe is prepared by using Fe-rich recycled A356 aluminum alloy, and the insufficient Al amount is prepared by using pure aluminum. Melt Fe-rich recycled A356 aluminum alloy, pure aluminum, Al-20Si, Al-10Cr, Al-10Mn, Al-10Sr alloy at 750℃, and then add tin foil to the melt when melted to a semi-solid state. After the weighed pure Mg is completely melted, it is manually stirred to make the composition uniform, and the temperature is raised to 775°C and the temperature is kept for 10 minutes. Refine with 2# refining agent, let stand for 5 minutes, keep the temperature of the molten metal a...

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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 a preparation method thereof. Background technique [0002] As aluminum alloy is the second largest metal structural material after steel, the recycling and reuse of scrap aluminum is an inevitable requirement for the sustainable development of society. Due to the contact coordination of aluminum alloy parts with Fe-based parts or the use of Fe-based connectors for assembly during the use of aluminum alloy parts, scrap aluminum often exhibits high Fe content after being recycled and remelted. Investigations found that the Fe content and mass ratio of recycled aluminum-silicon alloys is generally lower It is more than 0.6%, even as high as 2~3%; and Fe mainly exists in the form of needle-like β-Fe phase in aluminum alloy, which severely splits the matrix and has great harm to the mechanical properties of aluminum alloy. At present, t...

Claims

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Application Information

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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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