Preparation method of ceramic/metal composite wear-resistant material net-shaped preform

A metal composite and wear-resistant material technology, applied in metal processing equipment, coating, transportation and packaging, etc., can solve the problem of poor interface wettability, limited overall wear resistance improvement of composite wear-resistant materials, and differences in physical and chemical properties. Larger and other problems, to achieve the effect of improving wear resistance

Pending Publication Date: 2021-06-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical and chemical properties of the ceramic particles and the metal matrix are quite different, the ceramic particles are prone to agglomeration, and the wettability of the bonding interface is poor. It is difficult to achieve high-quality metallurgical bonding between the ceramic particles and the metal matrix. The overall wear resistance improvement is limited

Method used

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  • Preparation method of ceramic/metal composite wear-resistant material net-shaped preform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a ceramic / metal composite wear-resistant material mesh prefabricated body, comprising the following steps:

[0031] a.Al 2 o 3 Screening, grinding and cleaning of ceramic particles

[0032] 1) Use a 3mm screen to screen the ceramic particles to screen out Al with a diameter greater than 3mm 2 o 3 Ceramic particles, to ensure the uniformity of the particle size of the ceramic particles used in the whole process;

[0033] 2) Al with a diameter greater than 3mm screened out in step 1) 2 o 3 Ceramic particles are polished gradually from coarse to fine with 50-1500# sandpaper;

[0034] 3) Put the polished ceramic particles in step 2) into an alcohol solution with a volume percentage of 75% for ultrasonic cleaning, the ultrasonic time is 5 minutes, and the ultrasonic frequency is 100khz to remove surface impurities and oil stains, and then put the cleaned ceramic particles into Rinse in deionized water, and dry naturally after cleaning;

[0035]...

Embodiment 2

[0050] A method for preparing a ceramic / metal composite wear-resistant material mesh prefabricated body, comprising the following steps:

[0051] a.Al 2 o 3 and B 4 C Screening, grinding and cleaning of ceramic particles

[0052] 1) Use a 3mm screen to screen the ceramic particles to screen out Al with a diameter greater than 3mm 2 o 3 and B 4 C ceramic particles, to ensure the uniformity of the particle size of the ceramic particles used in the whole process;

[0053] 2) Al with a diameter greater than 3mm screened out in step 1) 2 o 3 and B 4 C The ceramic particles are polished gradually from coarse to fine with 50-1500# sandpaper;

[0054] 3) Put the polished ceramic particles in step 2) into an alcohol solution with a volume percentage of 75% for ultrasonic cleaning, the ultrasonic time is 5 minutes, and the ultrasonic frequency is 100khz to remove surface impurities and oil stains, and then put the cleaned ceramic particles into Wash in deionized water and air ...

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Abstract

The invention belongs to the technical field of wear-resistant material preparation and application, and particularly relates to a preparation method of a ceramic / metal composite wear-resistant material net-shaped preform. According to the preparation method, ceramic particles are basically fixed in space by utilizing the cohesiveness of a polyvinyl alcohol organic agent, so that uniform distribution is realized, the ceramic / metal composite wear-resistant material preform is prepared, uniformly distributed cylindrical pores are kept in the preform, metal liquid is conveniently poured into the preform for infiltration, the internal pores are filled with the metal liquid, finally, after an alloy solution is condensed, the ceramic / metal composite wear-resistant material with tight internal combination and uniform ceramic particle distribution is obtained, so that the overall wear resistance and comprehensive mechanical properties of a grinding roller are improved, and the service life of the grinding roller is prolonged. The preparation method is an efficient and economical preparation technology for industrial preforming of the ceramic / metal wear-resistant material.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of wear-resistant materials, and in particular relates to a method for preparing a ceramic / metal composite wear-resistant material mesh prefabricated body. Background technique [0002] Coal mill is one of the important equipment of thermal power plant. Grinding roller and liner are the key components of coal mill operation. They are in a state of high impact and heavy wear for a long time. The quality, especially the wear resistance, directly affects To the milling efficiency, the consumption degree of the grinding roller and the production cost. In actual service conditions, when the outer circle of the grinding roller is too small, it will lead to the overall scrapping of the grinding roller. Therefore, both at home and abroad are vigorously researching new technologies for the preparation of wear-resistant materials for new grinding rollers. [0003] The preparation techn...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B22F1/02B22F1/00B22F3/02B22F3/11B22F3/26B22D23/04
CPCB22F3/02B22F3/1121B22F3/26B22D23/04B22F1/10B22F1/17
Inventor刘瑞峰王文先高翔赵威
OwnerTAIYUAN UNIV OF TECH