A kind of preparation method of wear-resistant boot coating

A coating and powder technology, which is applied in the field of preparation of wear-resistant boot coatings, can solve the problems of poor wear resistance and short service life, and achieve the effects of good fluidity, enhanced corrosion resistance, and less voids in the coating

Active Publication Date: 2020-01-31
佛山市南海区科琎精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wear-resistant boots currently used are mostly made of stainless steel, which has poor wear resistance and short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method for a wear-resistant boot coating, comprising the following steps:

[0024] 1) Mix 15 parts of cobalt powder, 4 parts of chromium powder and 81 parts of tungsten carbide powder, add epoxy resin AB glue, polyethylene glycol and water and stir to obtain a slurry with a solid content of 60%;

[0025] Among them, the average particle size d of cobalt powder 50 50 microns, the average particle size of chromium powder d 50 50 microns, the average particle size of tungsten carbide powder d 50 50 microns; the total amount of epoxy resin AB glue and polyethylene glycol added is 5% of the powder after mixing.

[0026] 2), obtain the cobalt-chromium-tungsten carbide composite powder after the obtained slurry is spray-dried;

[0027] 3), the obtained cobalt-chromium-tungsten carbide composite powder and nickel powder are added into a ball mill according to the ratio for dry grinding, and after 5 minutes of ball milling, they are added to a vacuum furnace for...

Embodiment 2

[0035] A preparation method for a wear-resistant boot coating, comprising the following steps:

[0036] 1) Mix 5 parts of cobalt powder, 8 parts of chromium powder and 87 parts of tungsten carbide powder, add polyacrylate glue and water and stir to obtain a slurry with a solid content of 70%;

[0037] Among them, the average particle size d of cobalt powder 50 100 microns, the average particle size of chromium powder d 50 100 microns, the average particle size of tungsten carbide powder d 50 It is 100 microns, and its microscopic appearance is spherical; the mass fraction of polypropylene resin added is 5% of the mixed powder;

[0038] 2), the obtained slurry is spray-dried and sieved to obtain cobalt-chromium-tungsten carbide composite powder;

[0039] 3), the obtained cobalt-chromium-tungsten carbide composite powder and nickel powder are added into a ball mill according to the ratio for dry grinding, and after 15 minutes of ball milling, they are added to a vacuum furnac...

Embodiment 3

[0047] A preparation method for a wear-resistant boot coating, comprising the following steps:

[0048] 1) Mix 10 parts of cobalt powder, 4 parts of chromium powder and 86 parts of tungsten carbide powder, add epoxy resin AB glue and water and stir to obtain a slurry with a solid content of 70%;

[0049] Among them, the average particle size d of cobalt powder 50 150 microns, the average particle size of chromium powder d 50 The average particle size of tungsten carbide powder is 150 microns d 50 It is 150 microns, and its microscopic appearance is irregular; the addition amount of epoxy resin AB glue is 10% of the powder after mixing.

[0050] 2), the obtained slurry is spray-dried and sieved to obtain cobalt-chromium-tungsten carbide composite powder;

[0051] 3), the obtained cobalt-chromium-tungsten carbide composite powder and nickel powder are added into a ball mill according to the ratio for dry grinding, and after 2 minutes of ball milling, they are added to a vacuu...

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Abstract

The invention provides a preparation method of a wear resisting boot coating. At first, cobalt powder, chromium powder, tungsten carbide powder and a binder are mixed with water to be prepared into slurry, the slurry is sprayed and dried, then obtained powder and nickel powder are subjected to ball milling, vacuum firing, crushing and sieving to obtain coating powder, and finally the plasma spraying technology is adopted for spraying the coating powder to the wear resisting boot surface uniformly. According to the preparation method, the anti-corrosion nickel ingredient is added into the coating formula, and the anti-corrosion performance of the coating is enhanced greatly. The preparation technology of the coating powder is simple, the prepared coating powder is uniform in ingredient andgood in liquidity, and the requirement for heat spraying can be met. According to the preparation method, the plasma spraying technology is adopted in the spraying technology, the coating clearance issmall, the bonding force is high, due to the fact that the base body temperature in the spraying process is controlled, a workpiece will not deform, and the wear resisting and corrosion resisting abilities of wear resisting boots are improved greatly. It is guaranteed that the wear resisting boots work normally under multiple compound industrial mines with the corrosive media and high resistance.

Description

technical field [0001] The invention belongs to the technical field of material surface strengthening, and in particular relates to a preparation method of a wear-resistant boot coating. Background technique [0002] The ribs of the press screw shaft in the papermaking field are often subject to the friction of the pulp and are easy to wear, especially the pulp-facing surface of the ribs is more abrasive. Generally, the surface is sprayed, but due to the poor corrosion resistance of the coating material, the service life is short, the maintenance difficulty is high, and the maintenance cost is high. A common method is to spot weld wear-resistant shoes on the surface of the ribs of the press screw shaft to prolong its service life. Most of the wear-resistant boots currently used are made of stainless steel, which has poor wear resistance and short service life. Contents of the invention [0003] In order to solve the above-mentioned deficiencies in the prior art, the purp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C4/134B22F9/02
CPCB22F9/026C23C4/06C23C4/134
Inventor 曹东
Owner 佛山市南海区科琎精密机械有限公司
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