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Method for preparing hard wear-resistant coating

A wear-resistant coating, hard technology, applied in the field of hard wear-resistant coating, to achieve the effect of high hardness, uniform coating, easy to control thickness

Inactive Publication Date: 2006-06-07
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, WC-Co+MoS 2 Composite coating and the preparation of this composite coating by explosive spraying technology have not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The base material is A3 steel, the size of the ring block wear sample is 10mm×9.7mm×19mm, and the size of the sprayed surface is 10mm×19mm. Powder for detonation spraying is self-prepared WC-12Co+2%MoS 2 (weight percent) powder, the substrate is ground, sandblasted and cleaned before the coating is sprayed, and WC-Co+MoS is prepared by "OB" type explosive spraying system within two hours after substrate pretreatment 2 Composite coating, nitrogen is used as powder feeding gas and sweeping gas, oxygen and acetylene are used as heat source gas. The gas flow ratio of oxygen and acetylene is 1.05, the working frequency is 4-6 times per second, the spraying distance is 120 mm, the nozzle diameter is 20-25 mm, the powder feeding rate is 0.3-0.9 g / s, and the spraying disc is lapped The ratio is 30-50%, and a coating with a thickness of 150-400 μm is obtained.

[0031] Take the cross-section of the sample as the analysis surface, and make a metallographic sample, after alcohol...

Embodiment 2

[0035]The base material is A3 steel, the size of the abrasive wear sample is Φ4mm×30mm, and the coating surface is the cylindrical end surface. The size of the wear sample of the ring block is 10mm×9.7mm×19mm, and the size of the sprayed surface is 10mm×19mm. Powder for detonation spraying is self-prepared WC-12Co+4%MoS 2 (weight percent) powder, the substrate is ground, sand blasted and cleaned before spraying the coating, and WC-12Co+4%MoS is prepared by "OB" type explosive spraying system within two hours after substrate pretreatment 2 Composite coating, nitrogen is used as powder feeding gas and sweeping gas, oxygen and acetylene are used as heat source gas. The gas flow ratio of oxygen and acetylene is 1.05, the working frequency is 4-6 times per second, the spraying distance is 120 mm, the nozzle diameter is 20-25 mm, the powder feeding rate is 0.3-0.9 g / s, and the spraying disc is lapped The ratio is 30-50%, and a coating with a thickness of 150-400 μm is obtained.

...

Embodiment 3

[0040] The base material is A3 steel, the size of the ring block wear sample is 10mm×9.7mm×19mm, and the sprayed surface is 10mm×19mm. Powder for detonation spraying is self-prepared WC-12Co+6%MoS 2 (weight percent) powder, the substrate is ground, sand blasted and cleaned before spraying the coating, and WC-12Co+6%MoS is prepared by "OB" type explosive spraying system within two hours after substrate pretreatment 2 Composite coating, nitrogen is used as powder feeding gas and sweeping gas, oxygen and acetylene are used as heat source gas. The gas flow ratio of oxygen and acetylene is 1.05, the working frequency is 4-6 times per second, the spraying distance is 120 mm, the nozzle diameter is 20-25 mm, the powder feeding rate is 0.3-0.9 g / s, and the spraying disc is lapped The ratio is 30-50%, and a coating with a thickness of 150-400 μm is obtained.

[0041] Take the cross-section of the sample as the analysis surface, and make a metallographic sample, after alcohol cleaning...

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Abstract

The hard wear resistant coating preparing process features that the composite WC-Co / MoS2 powder is used in preparing the hard wear resistant coating by means of exploding spraying technology. The composite WC-Co / MoS2 powder consists of WC-Co in 94-99 wt% and MoS2 in 1-6 wt%. Compared with available technology, the composite wear resistant WC-Co / MoS2 coating of the present invention has high hardness, high compactness, high combination strength, low friction coefficient and very low wear loss and is one kind of excellent composite self-lubricating hard wear resistant coating.

Description

Technical field: [0001] The present invention relates to hard wear-resistant coating technology, specifically discloses a tungsten carbide-cobalt / molybdenum disulfide composite powder, its preparation method, and tungsten carbide-cobalt / molybdenum disulfide hard wear-resistant coating Preparation. Background technique [0002] With the rapid development of modern science and technology, the requirements for the comprehensive performance of mechanical parts are getting higher and higher, and it is difficult to achieve the required performance range only by developing conventional materials. Wear is one of the three main ways of material failure, and it is unavoidable, and the annual economic loss caused by wear is very alarming. According to statistics, the loss caused by wear and tear in the United States in 1981 was about 100 billion US dollars. The use of hard wear-resistant coatings can effectively reduce the wear of mechanical parts. At present, industrial production ...

Claims

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Application Information

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IPC IPC(8): C23C24/04
Inventor 孙超华伟刚许磊王启民刘山川刘健钢宫骏杜昊肖金泉闻立时
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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