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Low-wear-rate material and preparation method thereof

A low-wear, plate technology, applied in the field of aluminum alloy materials, can solve the problems of limited improvement of alloy strength and wear resistance, decline of alloy mechanical properties and wear resistance, no fine-grain strengthening and dispersion strengthening, etc., to reduce particles. Agglomeration and segregation, preventing excessive crystal growth, and reducing the effect of material wear and deformation

Inactive Publication Date: 2019-06-07
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The process improvement of the above invention only carries out the in-situ reaction of the Ti-C-Al prefabricated block during the casting process. Although TiC particles can be placed in the alloy to improve the strength and wear resistance, the method is single, without heat treatment and surface strengthening measures. The improvement of alloy strength and wear resistance is limited, and the composition of the alloy matrix is ​​relatively single, without fine-grain strengthening and dispersion strengthening, the wettability of the alloy liquid and foreign particles is poor, the dispersion of the generated TiC particles is difficult, and segregation and particle formation are prone to occur. Agglomeration, leading to a decrease in the mechanical properties and wear resistance of the alloy

Method used

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  • Low-wear-rate material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: prepare low wear rate material as follows:

[0033] 1. Preparation of raw materials:

[0034] The particle size of TiN nanoparticles is 25nm, before TiN nanoparticles are added to the plating solution, acid cleaning is carried out in a concentration of 17wt% hydrochloric acid solution, and then the TiN nanoparticles are put into 80mg / L sixteen. Stir and disperse for 2 hours in the alkyltrimethyl ammonium olfactory solution while ultrasonically, so as to improve the dispersibility of TiN nanoparticles in the solution.

[0035] The aluminum alloy matrix is ​​composed of the following components in weight percentage: 0.7% Sb, 0.03% Dy, 0.03% P, 0.03% Fe, 1.95% Cr, 0.2% Zn, 0.005% Pt, 0.2% Sn, 1.2% Bi, 0.01 %Th, 0.2% Nb, the balance is Al.

[0036] The purity of titanium nitride, titanium oxide, nickel oxide, and niobium diselenide are all ≥99.9%, and the relative weight ratio of titanium nitride, titanium oxide, nickel oxide, and niobium diselenide is 1.1:1...

Embodiment 2

[0050] Embodiment 2: prepare low wear rate material as follows:

[0051] 1. Preparation of raw materials:

[0052] The particle diameter of TiN nanoparticle is 40nm, and before TiN nanoparticle is added to plating solution, carry out acid cleaning in the concentration of 19wt% hydrochloric acid solution, after deionized water suction filter cleaning, put TiN nanoparticle into 80mg / L sixteen Stir and disperse for 2 hours in the alkyltrimethyl ammonium olfactory solution while ultrasonically, so as to improve the dispersibility of TiN nanoparticles in the solution.

[0053] The aluminum alloy matrix is ​​composed of the following components in weight percentage: 1.5% Sb, 0.09% Dy, 0.08% P, 0.08% Fe, 2.25% Cr, 0.7% Zn, 0.008% Pt, 0.8% Sn, 1.8% Bi, 0.05 %Th, 0.7% Nb, the balance is Al.

[0054] The purity of titanium nitride, titanium oxide, nickel oxide, and niobium diselenide is ≥99.9%, and the relative weight ratio of titanium nitride, titanium oxide, nickel oxide, and niobiu...

Embodiment 3

[0068] Embodiment 3: prepare low wear rate material as follows:

[0069] 1. Preparation of raw materials:

[0070] The particle diameter of TiN nanoparticle is 33nm, and before TiN nanoparticle is added to plating solution, carry out acid cleaning in the concentration of 18wt% hydrochloric acid solution, after deionized water suction filter cleaning, put TiN nanoparticle into 80mg / L sixteen Stir and disperse for 2 hours in the alkyltrimethyl ammonium olfactory solution while ultrasonically, so as to improve the dispersibility of TiN nanoparticles in the solution.

[0071] The aluminum alloy matrix is ​​composed of the following components in weight percentage: 1.1% Sb, 0.06% Dy, 0.055% P, 0.055% Fe, 2.1% Cr, 0.45% Zn, 0.0065% Pt, 0.5% Sn, 1.5% Bi, 0.03 %Th, 0.45% Nb, the balance is Al.

[0072] The purity of titanium nitride, titanium oxide, nickel oxide, and niobium diselenide is ≥99.9%, and the relative weight ratio of titanium nitride, titanium oxide, nickel oxide, and ni...

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Abstract

The invention discloses a low-wear-rate material. Titanium nitride, titanium oxide, nickel oxide and niobium diselenide mixture particles are evenly distributed in an aluminum alloy substrate, a nickel-cobalt clad layer and a diamond coating are distributed on the surface of the aluminum alloy substrate, the hardness of titanium nitride and nickel oxide is high, the hardness and the low-wear-rateperformance of the material are remarkably improved, and the anti-wear performance can be improved due to titanium oxide and niobium diselenide. By means of the composite coatings on the surface, thewear rate of the alloy surface can be effectively reduced, and the hardness can be effectively improved. Strengthening phases of Dy, P, Bi, Sn, Nb, Cr, Fe, Zn, Pt, Th and other elements in alloy are in dispersion strengthening. In a preparation method, mixed powder adheres to aluminum-selenium metal wires, the mixed powder is located in the center of mother alloy liquid during casting, rapid diffusion and homogenization of micro-powder particles are facilitated, chemical plating and CVD film forming parameters and conditions are optimized, the hardness and the smooth degree of the coatings areimproved, the film thickness is reduced, and the low-wear-rate performance of the material is effectively improved.

Description

technical field [0001] The invention relates to the field of aluminum alloy materials, in particular to a low wear rate material and a preparation method thereof. Background technique [0002] At present, the commonly used aluminum alloy surface modification technologies at home and abroad mainly include coating technology (electroplating, chemical plating, anodic oxidation), vapor phase deposition (PVD, CVD), thermal spraying technology (arc spraying, flame spraying, plasma spraying), high energy beam (Laser, ion beam, electron beam) surface modification technology and other methods. Although traditional aluminum alloy surface modification technologies (coating technology, vapor deposition, thermal spraying technology) can improve the hardness and wear resistance of aluminum alloys to a certain extent, there are still some inevitable limitations. For example, the coating technology has deficiencies such as insufficient dense coating layer, chromate toxicity, serious enviro...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00C22C1/10C23C18/36C23C16/27C23C28/00
Inventor 赵浩峰夏俊
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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