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Method for preparing ZTA particle reinforced metal matrix wear-resistant composite material by powder metallurgy

A composite material and metal matrix technology, applied in metal processing equipment, coating, transportation and packaging, etc., can solve problems such as complicated process, inability of metallurgical interface to buffer impact load, uneven wear resistance, etc. Uniform dispersion, good effect, uniform performance of parts

Active Publication Date: 2018-02-16
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cast infiltration method is to first use high-melting point metal powder and ceramic particles for mechanical mixing and sintering to make ceramic material prefabricated blocks with more pores, and then put multiple prefabricated blocks into the casting mold in a certain way and then use low The molten metal at the melting point is infiltrated in various ways to make wear-resistant parts, but only prefabricated blocks with a strengthening effect can achieve good wear resistance, resulting in uneven wear resistance of the whole part
In the existing preparation methods, in order to improve the interfacial bonding, the reactive active elements are repeatedly coated on the surface of the ceramic particles to form a metallurgical bonding surface with the ceramic particles. However, the process is complicated and the resulting metallurgical interface cannot be well formed. Shock load cushioning

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Fe-Cr base material

[0026] Mix 1-3mm ZTA particles, active metal elements Ni, Ti powder and polyvinyl butyral in a mass ratio of 4:1:1 to obtain a mixture;

[0027] Add absolute ethanol with the same quality as ZTA particles to the mixture to make a slurry, and mechanically stir the slurry to mix the components in the slurry evenly, and completely immerse the surface of the particles into the slurry;

[0028] Use a sieve to take out the ZTA particles coated with active elements Ni and Ti on the surface, and place them in a vacuum furnace for pretreatment at 1150°C for 1 hour to obtain ZTA particles with good coating effect;

[0029] Dry-mix the coated ZTA particles with the Fe-Cr-based matrix powder for 20 minutes;

[0030] Add E51 type epoxy resin to the dry-mixed material, the amount added is 5% of the total mass of powder and granules, adopt a maximum pressure of 600MPa to carry out staged pressing, and hold the pressure for 5 minutes after reaching ...

Embodiment 2

[0032] Embodiment 2: Ni-Cr base material

[0033] Mix 1-3mm ZTA particles, active metal elements Cu, Ti powder and polyvinyl butyral in a mass ratio of 4:1:1 to obtain a mixture;

[0034] Add absolute ethanol with the same quality as ZTA particles to the mixture to make a slurry, and mechanically stir the slurry to mix the components in the slurry evenly, and completely immerse the surface of the particles into the slurry;

[0035] Use a sieve to take out the ZTA particles coated with active elements Cu and Ti on the surface, and place them in a vacuum furnace for pretreatment at 1170°C for 1.5 hours to obtain ZTA particles with good coating effect;

[0036] Dry-mix the coated ZTA particles with the Ni-Cr matrix powder for 15 minutes;

[0037] Add E51 type epoxy resin to the dry mixed material, the amount added is 8% of the total mass of powder and granules, adopt a maximum pressure of 500MPa for graded compression, and keep the pressure for 5 minutes after reaching the maxim...

Embodiment 3

[0039] Embodiment 3: Fe-Cr-B-Si base material

[0040] Mix 1-3mm ZTA particles, active metal element Ti powder and polyvinyl butyral in a mass ratio of 4:1:1 to obtain a mixture;

[0041] Add absolute ethanol with the same quality as ZTA particles to the mixture to make a slurry, and mechanically stir the slurry to mix the components in the slurry evenly, and completely immerse the surface of the particles into the slurry;

[0042] Use a sieve to take out the ZTA particles coated with active element Ti powder, and place them in a vacuum furnace for pretreatment at 1200°C for 2 hours to obtain ZTA particles with good coating effect;

[0043] Dry-mix the coated ZTA particles with the Fe-Cr-B-Si matrix powder for 10 minutes;

[0044] Add E51 type epoxy resin to the dry-mixed material, the amount added is 7% of the total mass of powder and granules, adopt a maximum pressure of 550MPa to carry out staged pressing, and hold the pressure for 5 minutes after reaching the maximum pres...

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PUM

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Abstract

The invention provides a method for preparing ZTA particle-reinforced metal-based wear-resistant composite material by powder metallurgy, comprising: 1) uniformly coating active metal element powder on the surface of ZTA particles; 2) combining the coated particles with a metal matrix Put the powder into a ball mill or a mixer for mixing; 3) Add a binder to the mixed material and perform cold press molding; 4) Vacuum sinter the cold press molded parts, and after cooling, you can get wear-resistant composite material. Through the technical scheme of the present invention, not only embodies the advantages of powder metallurgy net size manufacturing, material saving, compositional design and temperature controllability, but also fully exerts the characteristics of high strength and high hardness of ZTA particles and high toughness of metal matrix, making manufacturing The resulting composite material has high impact resistance and wear resistance, which greatly improves the service life of the wear-resistant material.

Description

technical field [0001] The invention belongs to the technical field of preparation of particle-reinforced wear-resistant composite materials, and in particular provides a method for preparing ZTA particle-reinforced metal-based wear-resistant composite materials by powder metallurgy. Background technique [0002] Ceramic particles reinforced metal matrix composites have high specific strength, specific stiffness, low cost, easy processing, and good wear resistance. It is widely used in particle-reinforced metal matrix composites. In addition, the addition of ceramic particles not only improves the hardness and wear resistance of metal matrix materials, but also maintains the toughness of metal materials. It is an effective method to obtain high-strength, tough and wear-resistant materials. [0003] Alumina has a wide range of sources, low price, high hardness, and its linear expansion coefficient is closer to steel materials, so it is an ideal choice for reinforcing particle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02C22C1/05B22F3/16
CPCC22C1/05B22F2998/10B22F1/17B22F1/10B22F3/02B22F3/1021
Inventor 陈华辉李海存范磊李国华马峰
Owner CHINA UNIV OF MINING & TECH (BEIJING)