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Ni-P-diamond-TiAlN wear proofing and reducing composite coating and preparation method thereof

A composite coating and diamond technology, which is applied in the direction of metal material coating process, coating, metal layered products, etc., can solve the problems of aggravated composite coating wear, decreased wear resistance of composite coating, low strength, etc., to achieve good promotion Application value, simple preparation method, high wear resistance effect

Inactive Publication Date: 2014-05-07
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low strength of the Ni-P alloy coating, the tendency to deform, and the weak bonding strength between the diamond particles and the Ni-P coating, the Ni-P-diamond composite coating is likely to cause a large number of diamond particles from the composite coating during the wear process. Peeling in the middle and accumulating on the wear interface will aggravate the wear of the composite coating itself, and at the same time increase the friction coefficient and reduce the wear resistance of the composite coating

Method used

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  • Ni-P-diamond-TiAlN wear proofing and reducing composite coating and preparation method thereof
  • Ni-P-diamond-TiAlN wear proofing and reducing composite coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0011] In practical production, Ni-P-diamond-TiAlN composite coating is prepared on high-speed steel W6Mo5Cr4V2. The specific process and process are as follows:

[0012] 1) Pretreatment: Cut the W6Mo5Cr4V2 high-speed steel plate into a sample of 20mm×20mm×3mm, drill a through hole with a diameter of 3mm in the middle and upper part of the sample, and rough grind, finely grind and polish the sample to make the surface rough The degree is less than 0.5 microns;

[0013] 2) Chemical bright composite Ni-P-diamond composite coating: its formula and process conditions are: nickel sulfate 25 g / L, sodium hypophosphite 24 g / L, lactic acid 25 ml / L, boric acid 10 g / L, acetic acid Sodium 20 g / L, EDTA (surface brightener) 0.05g / L, diamond 25g / L, diamond particle diameter 5-10 microns, pH value 4.6-5, temperature 85-90 ℃, mechanical stirring speed 750 r / min, The time is 60 minutes, the thickness of Ni-P-diamond composite coating is about 12 microns, and the contents of P, diamond an...

Embodiment 2

[0017] In practical production, Ni-P-diamond-TiAlN composite coating is prepared on high-speed steel W6Mo5Cr4V2. The specific process and process are as follows:

[0018] 1) Pretreatment: Cut the W6Mo5Cr4V2 high-speed steel plate into a sample of 20mm×20mm×3mm, drill a through hole with a diameter of 3mm in the middle and upper part of the sample, and rough grind, finely grind and polish the sample to make the surface rough The degree is less than 0.5 microns;

[0019] 2) Chemical bright composite Ni-P-diamond composite coating: its formula and process conditions are: nickel sulfate 25 g / L, sodium hypophosphite 26 g / L, lactic acid 25 ml / L, boric acid 10 g / L, acetic acid Sodium 20 g / L, EDTA (surface brightener) 0.03g / L, diamond 30g / L, diamond particle diameter 5-10 microns, pH value 4.6-5, temperature 85-90 ℃, mechanical stirring speed 750 r / min, After 90 minutes, the thickness of the Ni-P-diamond composite coating is about 16 microns, and the contents of P, diamond and ...

Embodiment 3

[0023] In practical production, Ni-P-diamond-TiAlN composite coating is prepared on high-speed steel W6Mo5Cr4V2. The specific process and process are as follows:

[0024] 1) Pretreatment: Cut the W6Mo5Cr4V2 high-speed steel plate into a sample of 20mm×20mm×3mm, drill a through hole with a diameter of 3mm in the middle and upper part of the sample, and rough grind, finely grind and polish the sample to make the surface rough The degree is less than 0.5 microns;

[0025] 2) Chemical bright composite Ni-P-diamond composite coating: its formula and process conditions are: nickel sulfate 25 g / L, sodium hypophosphite 30 g / L, lactic acid 25 ml / L, boric acid 10 g / L, sodium acetate 20 g / L, EDTA (surface brightener) 0.03g / L, diamond 35g / L, diamond particle diameter 5-10 microns, pH value 4.6-5, temperature 85-90 ℃, mechanical stirring speed 750 r / min, time 120min, the thickness of the Ni-P-diamond composite coating is about 19 microns, and the contents of P, diamond and Ni are 10wt%, 1...

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Abstract

The invention relates to a Ni-P-diamond-TiAlN wear proofing and reducing composite coating and a preparation method thereof. The preparation method comprises the steps of preparing a Ni-P-diamond composite plating by a brightening chemical composite plating method to allow P and diamond contents of the plating to be 15-10wt% and 10-20wt% respectively and plating thickness to be 10-20 micrometres, depositing a TiAlN coating on the surface of the Ni-P-diamond plating by an electric arc ion plating method, and allowing the thickness of the TiAlN coating to be 5-10 micrometres and an Al content to be 15-25wt%, wherein the diameter of a used diamond particle is 5-10 micrometres. The obtained coating is high in wear resistance and long in service life; a friction coefficient is kept below 0.2 all the time during long-term frictional wear between the Ni-P-diamond-TiAlN composite coating and No. 45 steel; a wear life is above 2-5 times of that of the conventional Ni-P-diamond chemical composite plating; and the preparation method is simple and low in cost and has very good popularization and application values.

Description

technical field [0001] The invention relates to a Ni-P-diamond-TiAlN wear-resistant and wear-reducing composite coating and a preparation method thereof. Background technique [0002] In the past 10 years, hard coating technology has received more and more attention and research. Among them, the two most typical types of coatings are superhard coatings based on TiAlN coatings (hardness greater than 40GPa) and diamond coatings. . At present, TiAlN coating is widely used in the machining industry due to its small internal stress, high hardness and good high temperature oxidation resistance. Superhard coatings based on TiAlN coatings, such as TiAlSiN coatings, have high hardness, but they have large internal stress, large friction coefficient (the friction coefficient at room temperature is usually greater than 0.7), and poor toughness, which do not meet the requirements of modern green machining. There are few practical applications, and most of them are in the stage of labo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01C23C28/02C23C18/36C23C14/32C23C14/16
Inventor 冯长杰林佳平胡弦江鸢飞廖飞彪聂婷婷顾得权周雅杜楠
Owner NANCHANG HANGKONG UNIVERSITY