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Characterization method for quantifying carbide loss in hot spraying preparation of carbide cermet coating

A metal-ceramic coating and metal-ceramic technology, which is applied in the direction of metal material coating process, coating, fusion spraying, etc., to achieve the effect of simple process

Inactive Publication Date: 2011-01-12
JIUJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no quantitative method for the above two forms of carbon loss in the process of preparing carbide-based cermet coatings by thermal spraying.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Example 1: Preparation of Cr for specific supersonic flame spraying (HVOF) 3 C 2 -NiCr cermet coating, choose Cr 3 C 2 -NiCr cermet powder, the determination of oxygen content used RO-316 type pulse heating coulometric oxygen analyzer produced by American Leco Company. The carbon content was determined by using the LS-344 infrared absorption carbon and sulfur analyzer produced by American Leco Company. The experimental results are as follows: in the original powder C P is 8.48%, the oxygen flow rate is 447L / min, the gas flow rate is 37L / min, and the spraying distance is 210mm, C S 6.61%, C W is 8.32%, use the formula (1) to obtain ΔC Y is 0.16%, using the formula (2) to obtain ΔC R was 2.71%.

example 2

[0027] Example 2: Preparation of Cr for specific supersonic flame spraying (HVOF) 3 C 2 -NiCr cermet coating, choose Cr 3 C 2 -NiCr cermet powder, the determination of oxygen content used RO-316 type pulse heating coulometric oxygen analyzer produced by American Leco Company. The carbon content was determined by using the LS-344 infrared absorption carbon and sulfur analyzer produced by American Leco Company. The experimental results are as follows: in the original powder C P is 8.48%, the oxygen flow rate is 368L / min, the gas flow rate is 37L / min, and the spraying distance is 210mm, C S 6.54%, C W is 8.36%, using formula (1) to obtain ΔC Y is 0.12%, use the formula (2) to obtain ΔC R was 1.82%.

example 3

[0028] Example 3: Preparation of Cr for specific supersonic flame spraying (HVOF) 3 C 2 -NiCr cermet coating, choose Cr 3 C 2 -NiCr cermet powder, the determination of oxygen content used RO-316 type pulse heating coulometric oxygen analyzer produced by American Leco Company. The carbon content was determined by using the LS-344 infrared absorption carbon and sulfur analyzer produced by American Leco Company. The experimental results are as follows: in the original powder C P Under the conditions of 8.48%, oxygen flow rate of 447L / min, gas flow rate of 37L / min and spraying distance of 161.4mm, C S 6.13%, C W is 8.32%, use the formula (1) to obtain ΔC Y is 0.16%, using the formula (2) to obtain ΔC R was 2.19%.

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PUM

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Abstract

The invention discloses a characterization method for quantifying carbide loss in the hot spraying preparation of a carbide cermet coating, which comprises the following steps: comparing the carbon contents of coatings deposited under water and on a matrix under the conditions of different gas flows and oxygen flows, acquiring the change of the carbon content in the flying process of particles and after collision, and quantifying the carbon loss caused by oxidation and rebound of the particles. The method for quantifying the carbon loss of each phase in the deposition process of the carbide cermet coating based on experiment has the advantage of simple process, and can quickly, flexibly and conveniently quantify and detect the carbon loss in different phases in the hot spraying preparation process of the carbide cermet coating, thereby providing a research method for the preparation process and the performance optimization of the hot spraying carbide cermet coating structure.

Description

technical field [0001] The invention relates to a quantitative characterization method for carbon loss in the preparation of carbide cermet coatings by thermal spraying, which is suitable for quantitatively characterizing the amount of carbon loss in different forms of carbon loss in the process of preparing carbide cermet coatings by thermal spraying, and is useful for researching cermets Particle deposition behavior provides the means. Background technique [0002] Most of the thermal spraying flames are high temperature and oxidizing atmosphere. During the process of thermal spraying carbide cermet coating, there are losses caused by oxidation and instantaneous rebound of carbide particles colliding with the substrate. The wear performance of the cermet coating is closely related to its carbide content, and the hardness of the substrate is closely related to its carbon content. Studies have shown that the content of carbide particles in the thermal sprayed carbide cermet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10C23C4/06
Inventor 纪岗昌王洪涛宋杰光
Owner JIUJIANG UNIVERSITY
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