A superhard self-lubricating coating tool and its preparation method

A self-lubricating coating and tool technology, used in coatings, metal material coating processes, melt spraying and other directions, can solve the problems of severe tool friction and wear and tool life reduction, so as to improve tool life and reduce friction and wear. , the effect of strong binding strength

Active Publication Date: 2021-01-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in dry cutting, due to the lack of lubrication of cutting fluid, the tool friction and wear are severe and the tool life is reduced; at the same time, with the increase of people's awareness of environmental protection, self-lubricating tools have become a research hotspot for green cutting tools

Method used

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  • A superhard self-lubricating coating tool and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0018] A super-hard self-lubricating coating tool, the tool base material is W9Mo3Cr4V high-speed steel, and the base surface has a laminated super-hard self-lubricating layer composed of a hard alloy layer, an alumina ceramic layer, a silicon nitride ceramic layer and a cubic boron nitride layer. Coating, the superhard self-lubricating coating adopts the plasma spraying method to successively clad cemented carbide mixed powder, alumina ceramic layer mixed powder, silicon nitride ceramic mixed powder and cubic Preparation of boron nitride mixed powder. The weight percentage of each component in cemented carbide mixed powder is: 55% WC, 8% TiC, 8% Co, 1% TaN, 20% Ni60A, 2% PbO, 2% Mo, 2% TiB 2 , 0.5% BNNTs, 0.5% CNTs, 1% graphene, the sum of the weight percentages of each material is 100%; the weight percentage of each component in the alumina ceramic mixed powder is: 45% Al2 o 3 , 20% TiC, 20% Ni60A, 4% PbO, 4% Mo, 2% TiB 2 , 2% BNNTs, 2% CNTs, 1% graphene, the sum of the we...

Embodiment 2

[0027] A super-hard self-lubricating coating tool, the base material of the tool is 9W18Cr4V high-speed steel, and the surface of the base has a laminated super-hard self-lubricating layer composed of a hard alloy layer, an alumina ceramic layer, a silicon nitride ceramic layer and a cubic boron nitride layer. Coating, the superhard self-lubricating coating adopts the plasma spraying method to successively clad cemented carbide mixed powder, alumina ceramic layer mixed powder, silicon nitride ceramic mixed powder and cubic Preparation of boron nitride mixed powder. The weight percentage of each component in cemented carbide mixed powder is: 60%WC, 5%TiC, 5%Co, 2%TaN, 16%Ni60A, 3%PbO, 3%Mo, 3%TiB 2 , 1% BNNTs, 1% CNTs, 1% graphene, the sum of the weight percentages of each material is 100%; the weight percentage of each component in the alumina ceramic mixed powder is: 55% Al 2 o 3 , 15% TiC, 16% Ni60A, 3% PbO, 3% Mo, 3% TiB 2 , 2% BNNTs, 2% CNTs, 1% graphene, the sum of the...

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Abstract

The invention discloses a superhard self-lubricating coating tool and a preparation method thereof, and can be widely applied to cutting machining of dry cutting and refractory materials. A tool base material is high-speed steel, and a laminated superhard coating composed of a hard alloy layer, an aluminum oxide ceramic layer, a silicon nitride ceramic layer and a cubic boron nitride layer is arranged on the surface of a base body in sequence, a laminated coating has the self-lubricating effect; the laminated coating has the function of self-lubrication, and is prepared by adopting a plasma spraying method. The tool integrates high-speed steel, hard alloy, alumina ceramic and silicon nitride ceramic, cubic boron nitride and the laminated coating, the adding of a carbon nano pipe (CNTs) and a boron nitride nanopipe (BNHTs) improves the hardness, the wear resistance and the toughness of the coating, the whole tool not only has good toughness, but also has very high hardness and wear resistance; and in the cutting process, when the temperature is low, the graphene can have a lubricating effect, when the temperature is high, PbO, Mo and TiB2 can generate in-situ reaction to generate PbMoO4, TiO2 and B2O3 with a lubricating effect, so that the friction and abrasion of the tool in the cutting process can be reduced, and the service life of the tool is prolonged.

Description

technical field [0001] The invention belongs to the technical field of mechanical cutting tool manufacturing, and in particular relates to a superhard self-lubricating coating tool and a preparation method thereof. Background technique [0002] Tool coating technology is a high-quality surface modification technology. Coated tools have the advantages of high hardness, good heat resistance, oxidation resistance and corrosion resistance. Coating the tool surface is an important way to improve tool life. One of the methods. In order to further improve the performance of the tool, the coated tool has been developed from a single layer to diversification and compounding; at the same time, a single coating is subject to great limitations during use. By preparing a laminated composite coating, both the single coating and the The excellent performance of the coating can also make up for its limitations, thereby significantly improving the performance of the coated tool. However, d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/02C22C29/12C22C29/16C23C4/134C23C4/06C23C4/18
CPCC22C29/005C22C29/02C22C29/12C22C29/16C22C2026/008C23C4/06C23C4/18C23C4/134
Inventor 邢佑强郝秀清吴泽刘磊孙桂芳
Owner SOUTHEAST UNIV
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