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Manufacturing method for composite wear-resistant parts formed by slurry coating surface activation ZTA particles and reinforced iron matrixes

A composite wear-resistant part and surface activation technology, which is applied in the field of wear-resistant composite material preparation, can solve the problems of difficult uniform distribution of powder, unfavorable casting penetration of molten metal, and reduced strength of prefabricated blocks, etc., and achieves the effect of huge application potential

Inactive Publication Date: 2014-05-14
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation of prefabricated blocks, metal powder is used as the binder of ceramic particles and mixed with mechanical stirring, filled into a mold of a certain shape and then sintered, but the powder is difficult to distribute evenly on the surface of the particles, which will greatly reduce the strength of the prefabricated block. It is not conducive to the casting infiltration of molten metal and the uniformity of the performance of the entire composite layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Grinding roller

[0022] 1) First, the mixture of multiple active metal element powders Ni and Cr and anhydrous ethanol are mixed by ball milling to obtain mixed powder;

[0023] 2) Put the above-mentioned mixed powder into the liquid binder hydroxypropyl methylcellulose, stir at a constant temperature of 300 ℃ magnetic force to uniformly disperse the powder to form a slurry, the content of the active element powder in the slurry is 300g / L;

[0024] 3) Put the 10-20 mesh ZTA particles into the sieve and immerse them in the slurry for 10-30s, then take them out and place them for 10-60 minutes, repeat the immersion and coating 10-20 times, and then the slurry will be coated on the surface of the ZTA particles;

[0025] 4) Fill the coated ZTA particles into the graphite mold and put it into the furnace for sintering. From room temperature at a heating rate of 5℃ / min to the decomposition temperature of the liquid binder, keep it for 20-30min, and then continue to heat up...

Embodiment 2

[0027] Example 2: Crusher hammer

[0028] 1) Put the active metal element powder Ni into the liquid binder borax solution, stir the powder uniformly and form a slurry at a constant temperature of 400°C with magnetic force. The content of the active element powder in the slurry is 500g / L;

[0029] 2) Put the 10-20 mesh ZTA particles into the screen and immerse them in the slurry for 10-30s, then take them out and place them for 10-60 minutes, repeat the immersion and coating 10-20 times, and then the slurry will be coated on the surface of the ZTA particles;

[0030] 3) Fill the coated ZTA particles into the graphite mold and put them into the furnace for sintering, from room temperature to the decomposition temperature of the liquid binder at a heating rate of 10℃ / min, keep it for 20-30min, and then continue to heat up After reaching the sintering temperature of 1020℃, the temperature is kept for 1-2 hours, and then the temperature is lowered at 6℃ / min. After cooling to 900℃, the ZTA...

Embodiment 3

[0032] Example 3: Crusher board hammer

[0033] 1) Put the active metal element powder Cr into the liquid binder aluminum phosphate solution, and stir the powder uniformly to form a slurry at a constant temperature of 200°C. The content of the active element powder in the slurry is 100g / L;

[0034] 2) Put the 10-20 mesh ZTA particles into the screen and immerse them in the slurry for 10-30s, then take them out and place them for 10-60 minutes, repeat the immersion and coating 10-20 times, and then the slurry will be coated on the surface of the ZTA particles;

[0035] 3) Fill the coated ZTA particles into a graphite mold, press and put them into a furnace for sintering, heat up from room temperature to the decomposition temperature of the liquid binder at a heating rate of 9°C / min, hold for 20-30 minutes, and then continue to heat up After reaching the sintering temperature of 950℃, the temperature is kept for 1-2 hours, and then the temperature is lowered at 5℃ / min. After cooling to...

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Abstract

The invention discloses a manufacturing method for composite wear-resistant parts formed by slurry coating surface activation ZTA particles and reinforced iron matrixes. The method comprises the concrete steps that (1) multiple active element powder is mixed to be uniform and then placed into a liquid-containing binder to disperse uniform to form slurry; (2) after the surfaces of the ZTA particles are coated with the slurry, a graphite mould is filled with the ZTA particles, and porous prefabricated blocks are obtained through pressure application and sintering; (3) the prefabricated blocks are fixed on specific positions of a casting mould, molten metal is poured, and the composite wear-resistant parts are obtained after cooling and demoulding. According to the method, the added active element can improve interfacial wettability and bonding strength, and the slurry coating method is beneficial to uniformization of the active element on the surfaces of the particles. The shape and the size of the prefabricated blocks can be controlled through the mould, and therefore the method is applicable to manufacture of different kinds of wear-resistant parts. Wild phases and matrixes distributed in a staggered mode in a composite layer can guarantee that the wear-resistant parts have high wear resistance and long service life under the action of high stress, and therefore economic benefits are greatly improved.

Description

Technical field [0001] The invention belongs to the field of preparation of wear-resistant composite materials, and specifically relates to a method for preparing a slurry-coated surface activated ZTA particle reinforced steel-based composite wear-resistant part. Background technique [0002] Ceramic particle-reinforced metal matrix composites have the characteristics of both phases. Among them, high-strength, high-hardness ceramic particles can resist abrasion, while the metal matrix gives the ceramic particles a supporting effect and ensures that the composite wear-resistant parts have a higher overall performance. The toughness. In addition, different ceramic / metal combinations make wear-resistant parts suitable for various working conditions, such as high temperature, high impact, and corrosive environments, so they have the potential to be widely used in severe wear conditions. Especially the surface layer composite wear-resistant materials can greatly improve the toughness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04B22D23/04
Inventor 汤姝莉李烨飞高义民邢建东郑开宏孙良
Owner XI AN JIAOTONG UNIV
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