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Method for preparing glass ceramic coating layer by thermal spraying-laser in-situ reaction compound technology

An in-situ reaction and glass-ceramic technology, applied in metal material coating process, coating, fusion spraying, etc., can solve problems such as easy cracks, low fatigue mechanical properties, coating inclusions and pores, etc., and achieve surface smoothness , good interface binding performance and high overall quality

Active Publication Date: 2014-12-17
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the general powder is used, and the coating prepared by a single thermal spraying technology has many micropores and cracks, the interface between the coating and the substrate is poor, and the corrosion resistance of the coating is weak; while the thermal quenching laser technology can A coating with a better microstructure is prepared, but when the powder composition is selected unreasonably or the laser process parameters are not well controlled, the prepared coating has many inclusions and pores, is prone to cracks, and has low fatigue mechanical properties. Compared with the method of pre-coating powder, the coating is thicker and the surface smoothness is poor. Secondary processing is required to obtain the coating with the expected thickness that meets the structural performance requirements of the workpiece.

Method used

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  • Method for preparing glass ceramic coating layer by thermal spraying-laser in-situ reaction compound technology
  • Method for preparing glass ceramic coating layer by thermal spraying-laser in-situ reaction compound technology
  • Method for preparing glass ceramic coating layer by thermal spraying-laser in-situ reaction compound technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Thermal spraying of the present invention-laser in-situ reaction prepares the concrete steps of the method for glass-ceramic coating as follows:

[0034] (1) Preparation of CrFeAlTiC composite powder:

[0035] Add C-H compound industrial gorgon powder (general formula (C 6 h 10 o 5 ) n ), the specific ratio is 0.05g / 100ml, then stirred and heated into a paste;

[0036] FCrFe powder (mass fraction Cr%: ≥60%, C%: 7.0-8.5%, Fe%: balance), FeAl50 powder (mass fraction Fe%: 48-50%, Al%: balance), FTi powder (Mass fraction Ti%: ≥99%) According to the mass ratio (3.5:3.5:3), mix evenly by ball mill blending, put the mixed powder into the prepared pure aqueous solution of C-H compound, the weight of C-H compound accounts for the total amount of mixed powder 0.05% by weight, stirred to obtain mixed slurry;

[0037] Put the mixed slurry on the electric furnace while heating and stirring, evaporate the water to dryness, put the evaporated material in a blast drying oven (dry...

Embodiment 2

[0042] Thermal spraying of the present invention-laser in-situ reaction prepares the concrete steps of the method for glass-ceramic coating as follows:

[0043] (1) Preparation of CrFeAlTiC composite powder:

[0044] Add C-H compound industrial gorgon powder (general formula (C 6 h 10 o 5 ) n ), the specific ratio is 0.2g / 100ml, then stirred and heated into a paste;

[0045]FCrFe powder (mass fraction Cr%: ≥60%, C%: 7.0-8.5%, Fe%: balance), FeAl50 powder (mass fraction Fe%: 48-50%, Al%: balance), FTi powder (Mass fraction Ti%: ≥99%) According to the mass ratio (4.5:4.5:1), mix evenly by ball mill blending, put the mixed powder into the prepared pure aqueous solution of C-H compound, and the weight of C-H compound accounts for the total amount of the mixed powder. 0.2% by weight, stirred to obtain mixed slurry;

[0046] Put the mixed slurry on the electric furnace while heating and stirring, evaporate the water to dryness, put the evaporated material in a blast drying ove...

Embodiment 3

[0051] Thermal spraying of the present invention-laser in-situ reaction prepares the concrete steps of the method for glass-ceramic coating as follows:

[0052] (1) Preparation of CrFeAlTiC composite powder:

[0053] Add C-H compound industrial gorgon powder (general formula (C 6 h 10 o 5 ) n ), the specific ratio is 0.1g / 100ml, then stirred and heated into a paste;

[0054] FCrFe powder (mass fraction Cr%: ≥60%, C%: 7.0-8.5%, Fe%: balance), FeAl50 powder (mass fraction Fe%: 48-50%, Al%: balance), FTi powder (Mass fraction Ti%: ≥99%) According to the mass ratio (4.0:4.0:2), mix evenly by ball mill blending, put the mixed powder into the prepared pure aqueous solution of the C-H compound, the weight of the C-H compound accounts for the total amount of the mixed powder 0.1% by weight, stirred to obtain a mixed slurry;

[0055] Put the mixed slurry on the electric furnace while heating and stirring, evaporate the water to dryness, put the evaporated material in a blast dryi...

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Abstract

The invention discloses a method for preparing a glass ceramic coating layer by a thermal spraying-laser in-situ reaction compound technology. The method uses CrFeAlTiC composite powder as a raw material, and adopts the thermal spraying-laser in-situ reaction compound technology to prepare the coating layer. Firstly, a CrFeAlTiC thermal spraying coating layer is prepared through a thermal spraying mode; then, the laser remelting treatment is performed; in the laser remelting process, the elements of Cr, Fe, Al and Ti in the composite powder are reacted with O2 and N2 to generate the glass ceramic coating layer; the coating layer is high in interface bonding property, is smoother in surface, and is higher in comprehensive quality; and the thickness (5-300 microns) and the total mass of the glass ceramic coating layer generated by the in-situ reaction can be controlled through adjusting such parameters as laser power, light spot size and scanning speed, the composition proportion of the CrFeAlTiC composite powder and the components of reaction gas.

Description

technical field [0001] The invention relates to the technical field of glass ceramic coatings, in particular to a method for preparing glass ceramic coatings by thermal spraying-laser in situ reaction composite process. Background technique [0002] Existing structural materials cannot meet the surface performance requirements of some special working conditions (such as ADS system high temperature, strong radiation, heavy corrosion working conditions), and the cost of developing a new structural material for special working conditions is relatively high , the cycle is long, and a large number of studies have shown that the method of preparing coatings on the surface of existing structural materials is one of the important ways to improve the comprehensive properties of metal materials such as wear resistance and corrosion resistance. To put it simply, coating is to use physical or chemical methods to create a thin layer of material on the surface of a material that is well c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/10C23C4/12C23C4/18B22F1/00
Inventor 邱长军刘赞陈勇何彬张曼莉郑文权
Owner NANHUA UNIV