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High-wear-resistance powder metallurgy material and preparation method thereof

A powder metallurgy, high wear-resistant technology, applied in the field of powder metallurgy, can solve the problems that the enhancement of the wear resistance of the product cannot achieve the expected effect, and the bonding interface is not good, so as to achieve the effect of sufficient and easy high-temperature sintering and avoid unevenness

Active Publication Date: 2021-06-25
青岛方冠摩擦材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the fact that in the preparation process of the existing aluminum-based wear-resistant materials, the reinforcements added, such as silicon carbide particles, etc., have a poor bonding interface with the aluminum melt, resulting in the inability to actually enhance the wear-resistant performance of the product. Defects and deficiencies in achieving the expected effect, providing a high wear-resistant powder metallurgy material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Precursor preparation:

[0037] In parts by weight, 20 parts of graphene oxide, 20 parts of organoaluminum, 15 parts of organosilicon, 400 parts of absolute ethanol, 40 parts of fatty acid, 1 part of nano-iron powder, 2 parts of calcium fluoride, and graphene oxide are successively taken 3% ammonium nitrate by mass;

[0038] First mix graphene oxide and absolute ethanol into the reactor, and ultrasonically disperse for 30 minutes at a temperature of 55°C and an ultrasonic frequency of 60 kHz to obtain a dispersion;

[0039] Add organosilicon, organoaluminum, fatty acid, nano-iron powder, calcium fluoride and ammonium nitrate to the dispersion in sequence, then heat and reflux for 8 hours at a temperature of 75°C, stop the reaction, filter, and collect the filter cake. And wash the filter cake with absolute ethanol for 3 times, and then wash the filter cake with deionized water for 2 times, then transfer the filter cake after washing with deionized water into an oven, a...

Embodiment 2

[0046] Precursor preparation:

[0047] In parts by weight, 25 parts of graphene oxide, 26 parts of organoaluminum, 20 parts of organosilicon, 450 parts of absolute ethanol, 60 parts of fatty acid, 2 parts of nano-iron powder, 3 parts of calcium fluoride, and graphene oxide are taken successively 4% ammonium nitrate by mass;

[0048] First, mix graphene oxide and absolute ethanol into the reactor, and ultrasonically disperse for 50 minutes at a temperature of 60°C and an ultrasonic frequency of 100 kHz to obtain a dispersion;

[0049] Add organosilicon, organoaluminum, fatty acid, nano-iron powder, calcium fluoride and ammonium nitrate to the dispersion in sequence, then heat and reflux for 9 hours at a temperature of 78°C, stop the reaction, filter, and collect the filter cake. And wash the filter cake 4 times with absolute ethanol, then wash the filter cake 3 times with deionized water, then transfer the filter cake washed with deionized water into an oven, and dry it to a c...

Embodiment 3

[0056] Precursor preparation:

[0057] In parts by weight, successively take 30 parts of graphene oxide, 30 parts of organoaluminum, 30 parts of organosilicon, 500 parts of absolute ethanol, 80 parts of fatty acid, 3 parts of nano-iron powder, 4 parts of calcium fluoride, and graphene oxide 5% ammonium nitrate by mass;

[0058] First mix graphene oxide and absolute ethanol into the reactor, and ultrasonically disperse for 60 minutes at a temperature of 65°C and an ultrasonic frequency of 120kHz to obtain a dispersion;

[0059] Add organosilicon, organoaluminum, fatty acid, nano-iron powder, calcium fluoride and ammonium nitrate to the dispersion in sequence, then heat and reflux for 10 hours at a temperature of 80°C, stop the reaction, filter, and collect the filter cake. And wash the filter cake with absolute ethanol for 5 times, and then wash the filter cake with deionized water for 4 times, then transfer the filter cake after washing with deionized water into an oven, and ...

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Abstract

The invention belongs to the technical field of powder metallurgy, and particularly relates to a high-wear-resistance powder metallurgy material and a preparation method thereof. The product developed by the invention comprises aluminum nitride, silicon nitride, silicon carbide and graphene. The aluminum nitride, the silicon nitride and the silicon carbide are dispersed among graphene layers. Adjacent lamellar structures in the graphene molecular structure are bridged through silicon carbide. The preparation method comprises the following steps of: dispersing graphene oxide in absolute ethyl alcohol, adding organic silicon, organic aluminum and fatty acid, carrying out heating reflux reaction, filtering, washing and drying to obtain a precursor; and putting the precursor in a nitrogen atmosphere, slowly heating to 1600-1800 DEG C, carrying out heat preservation for reaction for 6-8 hours, cooling, and discharging to obtain the product. The product obtained by the invention has excellent wear resistance.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy. More specifically, it relates to a high wear-resistant powder metallurgy material and a preparation method thereof. Background technique [0002] Aluminum-silicon powder metallurgy alloy has high wear resistance, high strength, good heat resistance and low thermal expansion coefficient. The hypereutectic aluminum-silicon alloy produced by traditional casting is prone to coarse massive or plate-shaped primary silicon, which reduces the mechanical properties of the alloy, so there is a strict limit on the silicon content. The above problems can be avoided by using powder metallurgy production, and the size of primary silicon can be refined by using powder atomization technology and rapid solidification technology, and the solid solubility of silicon in aluminum can also be expanded (increased from 1.95at% to 10.16at%) . Due to the above advantages, powder metallurgy Al-Si alloys have a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52
CPCC04B35/522C04B2235/3865C04B2235/3873C04B2235/3826C04B2235/405C04B2235/445C04B2235/483C04B2235/48C04B2235/96C04B2235/443
Inventor 陈瑞英
Owner 青岛方冠摩擦材料有限公司
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