Amorphous coating, matrix comprising same and preparation process of amorphous coating

A technology of amorphous coating and preparation process, which is applied in the direction of metal material coating process, coating, fusion spraying, etc., can solve the problems of low amorphous phase content and bonding strength of the coating, and achieve wear resistance and hardness Good, improve the binding force, increase the effect of amorphous phase content

Active Publication Date: 2019-11-15
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem that the amorphous phase content and bonding strength of the coating are not high when the existing supersonic flame spraying technology is used to prepare large-area amorphous coatings, the present invention provides a preparation process for amorphous coatings. Process design can effectively increase the amorphous phase content and bonding strength of the coating when preparing large-area amorphous coatings, and improve the overall performance of the coating

Method used

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] A kind of preparation technology of the base body with amorphous coating of the present invention, for above-mentioned problem, provides solution measure, concrete steps are as follows:

[0035] 1. Prepare the substrate, clean and roughen the substrate in sequence. Specifically, the substrate is various metal substrates such as stainless steel, aluminum alloy, etc. The present invention uses aluminum alloy as an example to carry out experiments, but it does not mean that the substrate is limited to aluminum alloy. or massive substrates.

[0036] The cleaning process is as follows: first, wash away the stains on the surface of the substrate with clean water, and perform preliminary cleaning on the substrate, then use alcohol as the cleaning solution, put the substrate into an ultrasonic cleaner for deep cleaning, and the time is 20 minutes to ensure the cleanliness of the substrate surface .

[0037] The roughening process is as follows: firstly dry the cleaned substra...

Embodiment 1

[0050] The substrate is aluminum alloy, the composition and mass percentage of the metal powder for the middle layer are: Cr: 30%; Ni: 70%, the composition and mass percentage of the metal powder for the coating are: Ni: 52%; Zr: 37%; Nb: 8%; Si: 3%.

[0051] Oxygen pressure 0.8MPa, propane pressure 0.7MPa, air pressure 0.7MPa, oxygen flow rate 500L / min, propane flow rate 42L / min, air flow rate 375L / min, spraying distance 210mm, powder feeding speed 24g / min, spray gun moving speed: 500mm / s spraying temperature 3000 ℃.

[0052] Several groups of experiments were carried out under the experimental conditions, and the average amorphous phase content of the finally obtained large-area amorphous coating was 95.3%, and the hardness was 552HV.

Embodiment 2

[0054] The substrate is aluminum alloy, the composition and mass percentage of the metal powder for the middle layer are: Cr: 20%; Ni: 80%, the composition and mass percentage of the metal powder for the coating are: Ni: 60%; Zr: 20%; Nb: 15%; Si: 5%.

[0055] Oxygen pressure 0.5MPa, propane pressure 0.8MPa, air pressure 1.0MPa, oxygen flow rate 400L / min, propane flow rate 50L / min, air flow rate 400L / min, spraying distance 250mm, powder feeding speed 40g / min, spray gun moving speed: 520mm / s spraying temperature 3000 ℃.

[0056] Several groups of experiments were carried out under the experimental conditions, and the average amorphous phase content of the finally obtained large-area amorphous coating was 92.4%, and the hardness was 531HV.

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PUM

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Abstract

The invention discloses an amorphous coating, a matrix comprising the same and a preparation process of the matrix comprising the amorphous coating and belongs to the technical field of coating preparation. The chemical components of the coating include, by mass, 40-60% of Ni, 20-40% of Zr, 2-15% of Zb and 1-8% of Si. A metal intermediate layer is arranged between the matrix and the coating and can improve the bonding strength between the coating and the matrix. The process comprises the following steps of 1, preparing the matrix and conducting pretreatment; 2, weighing metal powder for the intermediate layer and metal powder for the coating and conducting pretreatment; 3, preparing the metal intermediate layer; and 4, preparing the coating. Through the reasonable process design, the amorphous phase content and the bonding strength of the coating can be effectively improved when the large-area amorphous coating is prepared, and the comprehensive performance of the coating is improved.

Description

technical field [0001] The invention belongs to the technical field of coating preparation, and more specifically relates to an amorphous coating, a substrate with the coating and a preparation process thereof. Background technique [0002] Supersonic flame spraying is a new type of thermal spraying technology. The core of its equipment is the spray gun. The spray gun consists of a combustion chamber (to fully heat and accelerate the spray material particles), a Laval nozzle (to accelerate the flame flow to supersonic speed) and a constant-section long spray gun. The tube (which enables the spray material particles to be fully heated and accelerated) consists of three parts. Its working principle is: various gases enter the combustion chamber and mix with oxygen and ignite, a strong gas phase reaction occurs, and the heat energy released by the combustion causes the gas to expand violently. When the expanded gas flows through the Laval nozzle, it is restricted by the nozzle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/129C23C4/06C23C4/02C22C45/04
CPCC22C45/04C23C4/02C23C4/06C23C4/129
Inventor 王萍郭爱民侯清宇王巍黄贞益马玉康郭云侠伍厚玲光剑锋马啸宇
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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