Composite coating

A composite coating and coating technology, applied in the direction of coating, metal material coating process, melting spray plating, etc., can solve the problems of low corrosion resistance and poor wear resistance, and achieve the effect of improving wear resistance.

Inactive Publication Date: 2015-10-21
SUZHOU HUARI JINLING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The application number is 200810064860.6, and the invention name is a patent of tungsten carbide / cobalt coating material. It proposes a kind of Tungsten carbide / cobalt-based coating, the material is made of tungsten carbide / cobalt-based powder and rare earth elements or nano-rare earth oxides, the obtained tungsten carbide / cobalt-based coating material has good wear resistance and strong corrosion resistance; Adding rare earth elements or nano-rare earth oxides improves the microstructure and mechanical properties of the coating material, and better improves the wear and corrosion resistance of the coating material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The ingredients of the bottom layer include:

[0025] 0.12wt% C, 2wt% Ni, 11wt% Cr, 0.9wt% Si, 0.9wt% B, the balance being Fe;

[0026] The coating is WC-10Co-4Cr and MoS 2 composite materials, where MoS 2 The weight percentage is 10%; the composition of WC-10Co-4Cr includes:

[0027] 3.0-18.0 wt% Co, 3.0-5.6 wt% C, less than or equal to 2.0 wt% Fe, 3.0-5.6 wt% Cr, and the balance is W.

[0028] The thickness of the bottom layer is 0.5mm, and the thickness of the coating is 200um.

[0029] Furthermore, the composite coating is formed by thermal spraying using a JP5000 type liquid fuel-oxygen supersonic flame spraying system.

Embodiment 2

[0031] The difference between this embodiment and Embodiment 1 is:

[0032] The ingredients of the bottom layer include:

[0033] 0.15wt% C, 2wt% Ni, 13wt% Cr, -1.2wt% Si, 1.3wt% B, the balance being Fe;

[0034] The coating is WC-10Co-4Cr and MoS 2 composite materials, where MoS 2 The weight percentage is 20%; the composition of WC-10Co-4Cr includes:

[0035] 3.0-18.0 wt% Co, 3.0-5.6 wt% C, less than or equal to 2.0 wt% Fe, 3.0-5.6 wt% Cr, and the balance is W.

[0036] The thickness of the bottom layer is 1mm, and the thickness of the coating is 300um.

[0037] The spraying method is the same as in Example one.

Embodiment 3

[0039] The difference between this embodiment and Embodiment 1 is:

[0040] The ingredients of the bottom layer include:

[0041] 0.13wt% C, 2wt% Ni, 12wt% Cr, 1.0wt% Si, 1.1wt% B, the balance being Fe;

[0042] The coating is WC-10Co-4Cr and MoS 2 composite materials, where MoS 2 The weight percentage is 15%; the composition of WC-10Co-4Cr includes:

[0043] 3.0-18.0 wt% Co, 3.0-5.6 wt% C, less than or equal to 2.0 wt% Fe, 3.0-5.6 wt% Cr, and the balance is W.

[0044] The thickness of the bottom layer is 0.8mm, and the thickness of the coating is 250um.

[0045] The spraying method is the same as in Example 1.

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Abstract

The invention discloses a composite coating which comprises a bottom layer and a coating body. The bottom layer comprises 0.12-0.15wt% of C, 2wt% of Ni, 11-13wt% of Cr, 0.9-1.2wt% of Si, 0.9-1.3wt% of B and the balance Fe. The coating is a composite material of WC-10Co-4Cr and MoS2. The weight percentage of the MoS2 is 10-20%. Abrasion resistance of the material is obviously improved through the composite coating. When the weight percentage of the MoS2 in the coating layer is 15%, the friction coefficient of the composite coating is minimum and ranges from 0.3 to 0.35.

Description

technical field [0001] The application belongs to the field of welding technology, and in particular relates to a composite coating. Background technique [0002] Thermal spraying technology has become an effective method to solve the surface strengthening technology of various mechanical parts such as wear resistance and corrosion resistance, which can prolong the life of mechanical equipment, such as tungsten carbide and chromium carbide coatings, etc. have been widely used in aviation, petroleum, power plants and centrifuges and other large mechanical equipment. [0003] The application number is 200810064860.6, and the invention name is a patent of tungsten carbide / cobalt coating material. It proposes a kind of Tungsten carbide / cobalt-based coating, the material is made of tungsten carbide / cobalt-based powder and rare earth elements or nano-rare earth oxides, the obtained tungsten carbide / cobalt-based coating material has good wear resistance and strong corrosion resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C22C38/54C22C29/02
Inventor 向延海
Owner SUZHOU HUARI JINLING MACHINERY
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