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Antifriction, noise-reduction and heat-insulation multifunctional composite layer based on tantalum-based alloy

A multi-functional, composite layer technology, applied in metal material coating process, coating, ion implantation plating, etc., can solve the problem of not effectively prolonging the life of the substrate, low heat insulation and impact resistance application ability, unstable crystal structure, etc. Problems, to achieve good corrosion resistance and erosion resistance, high energy utilization, simple and convenient operation of the equipment

Active Publication Date: 2020-11-17
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among the existing patents, CN109825795A (a method for preparing a wear-resistant and heat-insulating composite coating for steel workpieces), its disadvantage is that the self-lubricating coating adopts a common Mo coating for transition, because its crystal structure is in high temperature or frictional environment Unstable, low degree of protection for the matrix, no effective extension of the life of the matrix
CN108411300A (a kind of laser cladding nickel-based self-lubricating coating on the surface of titanium alloy and its preparation method) has the disadvantage that the preparation method of the lubricating layer is only aimed at the self-lubricating function of the titanium alloy surface, and its coating performance is relatively single
CN104746071A (a metal-based self-lubricating composite coating and its preparation method), the difference is that the composition of the self-lubricating coating and the technology adopted are more suitable for common alloy substrates, and its application ability in heat insulation and impact resistance is better than that of tantalum-based coatings. lower alloy

Method used

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  • Antifriction, noise-reduction and heat-insulation multifunctional composite layer based on tantalum-based alloy
  • Antifriction, noise-reduction and heat-insulation multifunctional composite layer based on tantalum-based alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 specific preparation process schematic diagram:

[0026] The tantalum-based alloy was selected as the substrate for the test, and the sample size was 80mm×40mm×5mm, which were polished with W50, W40, W28, and W10 sandpaper in sequence. 2 CO 3 The surface was degreased in the solution, washed in deionized water, and dried to prepare a self-lubricating coating.

[0027] At first adopt ball milling mode with 85% mixture H (the component mass fraction ratio of mixture H comprises: the Nb of 40%, the zirconia of 32%, the Al(OH) of 15% 3 , 5% titanium oxide, 8% carbon fiber), 12% nano-Ti powder, 3% ZrO 2 Mix about 15g in a ball mill in proportion to obtain a powder with no obvious particles and a uniform color. The powder particle size is 60 μm, and the powder is dried at 150°C for 1 hour; through a Metco 9MB atmospheric plasma spraying machine, the process parameters are 54V and current. 550A, the argon gas flow rate is 60L / h, the argon gas pressure is 0.7MPa...

Embodiment 2

[0031] Embodiment 2 concrete preparation flow chart:

[0032] A tantalum-based alloy was selected as the substrate for the test, and a cylindrical sample with a diameter of D = 40mm and a thickness of h = 5mm was used to grind it with W50, W40, W28, and W10 sandpaper in sequence. 2 CO 3 The surface was degreased in the solution, washed in deionized water, and dried to prepare a self-lubricating coating.

[0033] At first adopt ball milling mode with 70% mixture H (the component mass fraction ratio of mixture H comprises: (28% Nb, 40% zirconia, 17% Al(OH) 3, 5% titanium oxide, 10% carbon fiber), 20% nano-Ti powder, 5% ZrO 2 Mix about 15g in a ball mill in proportion to obtain a powder with no obvious particles and uniform color. The powder particle size is 55μm. The powder is dried at 150°C for 1h; through a Metco 9MB atmospheric plasma spraying machine, the process parameters voltage is 54V, and the current is 550A, the argon gas flow rate is 60L / h, the argon gas pressure i...

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Abstract

The invention provides a tantalum-based alloy-based self-lubricating coating with a three-layer coating structure including a heat insulation layer, an antifriction transition layer and an antifriction action layer. A metal matrix of the coating is a tantalum base which is relatively vacant in research at present, a tantalum-based alloy is usually applied to the field of aerospace due to good corrosion resistance and high-temperature resistance, and a self-lubricating technology for the alloy is relatively few at present; and ion spraying, argon arc cladding, vacuum sputter coating and other technologies are adopted in a preparation process, equipment operation is simple and convenient, and the beneficial effects of being high in energy utilization rate, convenient to adjust and the like are achieved.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and relates to a composite functional self-lubricating coating based on the surface layer of a tantalum-based alloy. It adopts technologies such as ion spraying, argon arc cladding, and vacuum sputtering coating to provide a highly lubricating multifunctional coating. Preparation method of tantalum-based alloy self-lubricating coating. Background technique [0002] With the production of a large number of advanced machines and the increase of high-load movement of industrial and agricultural machinery. In the aerospace, military, food, or pharmaceutical industries, there are higher requirements for the lubricity of materials. Compared with the traditional liquid lubricant method, solid self-lubricating materials have excellent performance. A large number of practical materials show that liquid lubricants are easy to damage and fall off under the action of high temperature, and their...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/134C23C14/06C23C14/34
CPCC23C4/134C23C4/06C23C14/34C23C14/0688
Inventor 吴梦陵李桂贞王昊元杨咏锦陆子欣李永琪张铖泓潘龙腾跃
Owner NANJING INST OF TECH