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Fe-based metal glass composite coating enhanced by WC-Co as well as preparation method of the coating

A technology of composite coating and iron-based metal, which is applied in the direction of metal material coating process, coating, heating inorganic powder coating, etc., can solve the problems that cannot meet the wear environment, etc., to overcome the lack of wear resistance, wear resistance and corrosion resistance improvement, the effect of excellent performance

Inactive Publication Date: 2014-01-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current studies have shown that both atmospheric plasma spraying (APS) and supersonic flame spraying (HVOF) can be used to prepare Fe-based amorphous coatings, but the coatings prepared by HVOF are denser than those prepared by APS, and the hardness, strength and resistance Corrosion has been improved
However, compared with expensive WC-Co coatings, the wear resistance of Fe-based amorphous coatings is still insufficient, and cannot meet some harsh wear environments, especially in dry friction environments.

Method used

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  • Fe-based metal glass composite coating enhanced by WC-Co as well as preparation method of the coating
  • Fe-based metal glass composite coating enhanced by WC-Co as well as preparation method of the coating
  • Fe-based metal glass composite coating enhanced by WC-Co as well as preparation method of the coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] WC-12Co powder with a volume fraction of 10% and Fe-based amorphous powder with a volume fraction of 90% are used as raw materials, mixed evenly and put into a powder feeder, and then sent to the supersonic spraying equipment through high-pressure (atmospheric pressure 0.7Mpa) nitrogen in the spray gun. Spraying parameters are set as follows: propane pressure 0.65MPa, propane flow rate 15L / min, oxygen pressure 0.7MPa, oxygen flow rate 100L / min, coating distance 275mm; preheat the substrate to 200°C before spraying, and cool it with compressed air after spraying. The base material is Q235 steel, and the size of the sample to be sprayed is 80×50×5mm. In the prepared coating, the volume fraction of WC-12Co is about 5%, and the rest is Fe-based amorphous components. After the final test, its strength ≥ 60MPa, hardness 700HV 0.1 ~850HV 0.1, when grinding against GCr15 bearing steel, the wear rate is about 63% of the pure iron-based metallic glass coating prepared under th...

Embodiment 2

[0032] WC-17Co powder with a volume fraction of 15% and Fe-based amorphous powder with a volume fraction of 85% are used as raw materials, mixed evenly and put into a powder feeder, and then sent to the supersonic spraying equipment through high-pressure (air pressure 0.7Mpa) nitrogen in the spray gun. Spraying parameters are set as: propane pressure 0.65MPa, propane flow rate 15L / min, oxygen pressure 0.7MPa, oxygen flow rate 100L / min, coating distance 275mm; preheat the substrate to 200°C before spraying, and cool it with compressed air after spraying. The base material is Q235 steel, and the size of the sample to be sprayed is 80×50×5mm. In the prepared coating, the volume fraction of WC-17Co is about 7%, and the rest is Fe-based amorphous components. After the final test, its strength ≥ 60MPa, hardness 750HV 0.1 ~850HV 0.1 , when grinding against GCr15 bearing steel, the wear rate is about 50% of the pure iron-based metallic glass coating prepared under the same conditio...

Embodiment 3

[0034] WC-12Co powder with a volume fraction of 20% and Fe-based amorphous powder with a volume fraction of 80% are used as raw materials, mixed evenly and put into a powder feeder, and then sent to the supersonic spraying equipment through high-pressure (atmospheric pressure 0.7MPa) nitrogen in the spray gun. Spraying parameters are set as follows: propane pressure 0.65MPa, propane flow rate 17L / min, oxygen pressure 0.7MPa, oxygen flow rate 120L / min, coating distance 300mm; preheat the substrate to 200°C before spraying, and cool it with compressed air after spraying. The base material is Q235 steel, and the size of the sample to be sprayed is 80×50×5mm. In the prepared coating, the volume fraction of WC-12Co is about 10%, and the rest is Fe-based amorphous composition. After the final test, its strength ≥ 60MPa, hardness 850HV 0.1 ~950HV 0.1 , when grinding against GCr15 bearing steel, the wear rate is about 42% of the pure iron-based metallic glass coating prepared under...

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Abstract

The invention provides a Fe-based metal glass composite coating enhanced by WC-Co as well as a preparation method of the coating. By volume, 10%-30% of WC-Co powder and 70%-90% of Fe-based amorphous powder are mixed evenly to obtain a mixture serving as a spraying material, and by virtue of a hypersonic flame spraying technology, the metal glass coating enhanced by a hard alloy is prepared on the surface of a part. Compared with the existing Fe-based amorphous coating, the Fe-based metal glass composite coating is higher in hardness, strength and wear-resisting performance. Compared with a WC-Co coating prepared by the same method, the Fe-based metal glass composite coating is similar in performance but much lower in cost. The Fe-based metal glass composite coating with excellent performance and low cost can be used for not only enhancing product performance during production of new products, but also repairing or re-manufacturing waste products, and has extensive application prospect.

Description

technical field [0001] The invention provides a WC-Co reinforced iron-based metallic glass composite coating and its preparation method, which belongs to the technical field of surface engineering, especially relates to the technology of preparing wear-resistant and corrosion-resistant coatings on the surface of iron and steel parts, and is applicable to various Parts manufacturing and repair remanufacturing process. Background technique [0002] With the development of modern industry, the requirements for the surface properties of mechanical parts are getting higher and higher. At the same time, the upgrading of technology has also brought about a large number of scrapped electromechanical products. In view of the dual pressures of the environment and resources, it is urgent to develop green and sustainable recycling and remanufacturing technologies. Thermal spraying technology can improve the surface performance of products by preparing coatings on the surface of parts, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02C23C24/08C23C4/04
Inventor 马宁程振雄乌焕涛叶福兴
Owner TIANJIN UNIV
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