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Wear-resistant composite coating for toothed rail of mining scraper and preparation method of wear-resistant composite coating

A technology of composite coating and scraper machine, applied in the direction of coating, metal material coating process, etc., to achieve the effect of reducing manufacturing cost, shortening maintenance time, and improving wear resistance

Active Publication Date: 2021-10-26
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the serious wear problem of the mine scraper gear rack, and provides a mine scraper with high hardness, excellent wear resistance and low maintenance cost, which is suitable for mine use. Ferro-alloy Anti-wear Composite Coating for Scraper Rack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] An anti-wear composite coating for the gear rail of a mining scraper machine and its preparation method, the composition and mass ratio of the anti-wear composite coating are: 50.0% iron powder, 35.0% chromium powder, 8.0% molybdenum powder, 2.5% % boron powder and 4.5% niobium carbide powder. The iron powder, chromium powder and molybdenum powder used are spherical powders with a particle size of 55 μm, and the particle size of boron powder and niobium carbide powder is 70 μm. According to the mass ratio, the corresponding metal powders are weighed and mixed in a planetary ball mill. The uniformly mixed powder obtained is placed in the powder feeding barrel, and the coating is clad by laser synchronous cladding method. Argon is used as the protective gas during the cladding process. The specific parameters are as follows: the laser power is 1000w, and the cladding rate is 4mm / s, the spot diameter is 2mm, the overlap rate is 35%, and the powder feeding rate is 0.4r / mi...

Embodiment 2

[0019] An anti-wear composite coating for the gear rail of a mining scraper machine and its preparation method, the composition and mass ratio of the anti-wear composite coating are: 41.0% iron powder, 40.0% chromium powder, 10.0% molybdenum powder, 2.0% % boron powder and 7.0% niobium carbide powder. The iron powder, chromium powder and molybdenum powder used are spherical powders with a particle size in the range of 55 μm, and the boron powder and niobium carbide powder have a particle size of 60 μm. According to the mass ratio, the corresponding metal powders are weighed and mixed in a planetary ball mill. Put the uniformly mixed powder into the powder feeding barrel, and use the laser synchronous cladding method to clad the coating. During the cladding process, argon is used as the protective gas. The specific parameters are as follows: the laser power is 2000w, and the cladding rate is 5.5 mm / s, the spot diameter is 2mm, the overlap rate is 40%, and the powder feeding ra...

Embodiment 3

[0023] An anti-wear composite coating for the gear rail of a mining scraper machine and its preparation method, the composition and mass ratio of the anti-wear composite coating are: 32.5% iron powder, 45.0% chromium powder, 10.0% molybdenum powder, 1.5% % boron powder and 11.0% niobium carbide powder. The iron powder, chromium powder and molybdenum powder used are spherical powders with a particle size range of 65 μm, and the boron powder and niobium carbide powder have a particle size of 70 μm. According to the mass ratio, the corresponding metal powders are weighed and mixed in a planetary ball mill. The uniformly mixed powder obtained is placed in the powder feeding barrel, and the coating is clad by the laser synchronous cladding method. Argon is used as the protective gas during the cladding process. The specific parameters are as follows: the laser power is 2500w, and the cladding rate is 5.5 mm / s, the spot diameter is 2mm, the overlap rate is 40%, and the powder feedi...

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Abstract

The invention discloses a wear-resistant composite coating for a toothed rail of a mining scraper and a preparation method, belongs to the technical field of wear-resistant composite coatings, can solve the problem of serious wear of the toothed rail of the mining scraper, and adopts a laser cladding technology to clad the wear-resistant composite coating on the working surface of the toothed rail of the scraper. The coating is an iron alloy wear-resistant composite coating and comprises the following components in percentage by mass: 30.0 to 50.0 percent of iron powder, 35.0 to 45.0 percent of chromium powder, 8.0 to 15.0 percent of molybdenum powder, 1.0 to 2.5 percent of boron powder and 3.0 to 11.0 percent of niobium carbide. The wear-resistant coating is metallurgically bonded with the surface of the toothed rail, and the wear resistance of the coating is improved by adopting niobium carbide ceramic particles. The wear-resistant composite coating shows excellent impact resistance and wear resistance under the conditions of heavy load, three-body wear and dry friction. The technology is simple, the preparation cost is low, the service life is long, the scraper toothed rail which fails due to abrasion can be rapidly repaired on site, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of anti-wear composite coatings, and in particular relates to an anti-wear composite coating for a rack of a mine scraper machine and a preparation method thereof. Background technique [0002] During the working process of coal mine machinery, the accidents caused by component failure account for 80-90% of the total, and the accidents caused by parts wear account for about 80% of them. The walking of the underground coal mining machine in coal mine is to provide the power of walking through its own walking gear meshing with the tooth rail of the scraper machine. During the working process, the rack rail is mainly subjected to the lateral force of the guide shoe, the traction force of the shearer, and the partial gravity of the shearer itself, etc., and the force situation is complicated. However, the working surface of the scraper rack and the shearer gear is an open structure, and it is difficult for lubr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F9/04C22C30/00C22C32/00C22C38/22C22C38/26C22C38/32C22C38/36
CPCC23C24/103C22C30/00C22C32/0052C22C38/22C22C38/32C22C38/26C22C38/36C22C27/06B22F9/04B22F2009/043
Inventor 崔功军寇子明吴娟李方舟程书帅
Owner TAIYUAN UNIV OF TECH