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Thermal-sprayed interface enhancer and preparation and using methods thereof

A technology of interface enhancer and thermal spraying, which is applied in the direction of coating, molten spraying, metal material coating technology, etc., can solve the problems of the introduction of impurities between the coating and the surface of the substrate, weak bonding, easy oxidation of the interface, etc., to achieve The effect of low spraying environment requirements, low requirements for operators, and strong adhesion

Active Publication Date: 2017-10-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the present invention is: the introduction of impurities on the surface of the coating and the substrate during the thermal spraying process, the interface is easily oxidized, the interface is defective, the bond is not firm, and the problems are easy to fall off.

Method used

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  • Thermal-sprayed interface enhancer and preparation and using methods thereof
  • Thermal-sprayed interface enhancer and preparation and using methods thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0029] In this embodiment, a thermal spraying interface enhancer comprises the material composition of the following components: 45 parts by weight of a metal spreading agent, 20 parts by weight of a miscible solvent, and 35 parts by weight of an additive, wherein the metal spreading agent is potassium fluorotitanate, and the miscible solvent is Distilled water, additives include the anti-oxidant that mass percentage is 50%, the purifying agent that mass percentage is 20%, the thickening agent that mass percentage is 30%, wherein anti-oxidant is by mass percentage be that 80% sodium borate and mass percentage are 20% It is composed of sodium fluoroborate, the purifying agent is potassium fluoride and sodium chloride mixed according to the mass ratio of 1:1, and the tackifier is composed of calcined boric acid and sodium hydroxide.

[0030] The method of preparing and using the thermal spraying interface enhancer in this embodiment uses an aluminum alloy as the substrate, and sp...

Embodiment 2

[0038] In this embodiment, a thermal spraying interface enhancer comprises 20 parts by weight of a metal spreading agent, 45 parts by weight of a miscible solvent, and 35 parts by weight of an additive, wherein the metal spreading agent is potassium fluozirconate, the miscible solvent is distilled water, and the additive includes a mass percentage of 25% antioxidant, 45% purifier by mass, 30% tackifier by mass, wherein the antioxidant is 70% lithium borate by mass, 30% borax by mass, and fluorine scavenger Sodium Chloride and Potassium Chloride are mixed 1:1, and the thickener is mixed with Boric Acid and Potassium Hydroxide.

[0039] The preparation and use method of the thermal spraying interface enhancer in this embodiment, the high manganese steel is used as the substrate in this embodiment, and the silicon nitride ceramic coating is sprayed on the high manganese steel substrate, and the coating is used in an acidic environment. The specific method is as follows:

[0040] ...

Embodiment 3

[0046] In this embodiment, a thermal spray interface enhancer comprises 35 parts by weight of a metal spreading agent, 20 parts by weight of a miscible solvent, and 60 parts by weight of an additive, wherein the metal spreading agent is potassium fluoroaluminate, the miscible solvent is distilled water, and the additive includes a mass percentage of 50% antioxidant, mass percentage is 45% purifying agent, mass percentage is 5% tackifier, wherein anti-oxidant is lithium borate that mass percentage is 75%, mass percentage is potassium fluoroborate of 25%, purifying agent It is made by mixing lithium fluoride and potassium chloride 1:1, and the tackifier is made by mixing boric acid and potassium hydroxide.

[0047] The method of preparing and using the thermal spraying interface enhancer in this embodiment, the high-speed tool steel is used as the substrate in this embodiment, and the cermet coating is sprayed on the high-speed tool steel substrate (the ceramic coating is made of...

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Abstract

The invention discloses a thermal-sprayed interface enhancer and preparation and using methods thereof, and belongs to the technical field of thermal spraying. After the interface enhancer is prepared by adding an oxidation inhibitor, a purifying agent, a thickening agent and a miscible agent into a metal spreading agent, the surface of a base material is evenly coated with the interface enhancer, and then coating spraying is conducted, so that a coating with higher bonding firmness is obtained. The problems that impurities are introduced, an interface is prone to being oxidized, interface defects are caused, bonding is infirm, and falling is likely to occur in the coating spraying process in the thermal spraying field are solved to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of thermal spraying, and relates to a thermal spraying interface enhancer and a preparation and use method thereof. Background technique [0002] With the progress of society, the performance requirements of materials are getting higher and higher, thermal spraying coatings have received great attention, and thermal spraying technology is widely used in aerospace, aviation, navigation and other fields. Before thermal spraying, the surface of the substrate must be roughened by sandblasting. In this process, it is inevitable that some impurities that will affect the characteristics and adhesion of the coating will be introduced; Arc or flame is heated to a very high temperature to make it into a liquid or viscous molten state, and high-speed compressed air is used to spray molten metal droplets onto the surface of the substrate at high speed. Oxidation is prone to occur during this process, which affects the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/02
CPCC23C4/02
Inventor 宋鹏李乔磊吕建国陆建生
Owner KUNMING UNIV OF SCI & TECH