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A toughened and reinforced in-situ reactive micro-textured self-lubricating coating tool and its preparation method

A technology of self-lubricating coating and in-situ reaction, applied in coating, metal material coating process, manufacturing tools, etc., can solve the problems of tool toughness to be improved, lack of self-lubricating ability, complicated preparation method, etc., to achieve Good self-lubricating effect, good toughness, high production efficiency

Active Publication Date: 2021-06-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent "Application No.: 201710709832.4" reports a polycrystalline cubic boron nitride cutting tool material and its preparation method, which is prepared by mixing cubic boron nitride and binder powder by hot pressing sintering and spark plasma rapid sintering , the hardness of the tool prepared by this method is high, and the high temperature performance is excellent; but the toughness of the tool needs to be improved, and the preparation method is relatively complicated and the preparation cost is high
The Chinese patent "Application No.: 02139629.9" reports a boron nitride composite coating cutting tool and its preparation method. It is prepared by plasma pulse laser deposition or electric heating wire assisted radio frequency plasma CVD method. The tool surface coating and The matrix has a strong binding force, but it does not have self-lubricating ability

Method used

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  • A toughened and reinforced in-situ reactive micro-textured self-lubricating coating tool and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0021] A toughened and reinforced in-situ reactive micro-textured self-lubricating coating tool, the tool base material is high-speed steel, and a toughened and reinforced in-situ reactive cubic boron nitride self-lubricating coating is deposited on the surface of the substrate, the coating The layer is prepared by cladding the cubic boron nitride mixed powder by plasma spraying technology, and the weight percentage of each component in the cubic boron nitride mixed powder is: 50% CBN, 18% Ni60A, 10% WC, 5% PbO, 5% Mo, 8% TiB 2 , 2% BNNTs, 1.5% CNTs, 0.5% graphene; after the cladding is completed, a micro-texture is processed on the surface of the tool.

[0022] A method for preparing a toughened and reinforced in-situ reactive micro-textured self-lubricating coating tool of the present invention comprises the following steps:

[0023] 1) Preparation of cubic boron nitride layer

[0024] (a) Pre-treatment: place the tool in alcohol and acetone solutions for ultrasonic cleani...

Embodiment 2

[0031] A toughened and reinforced in-situ reactive micro-textured self-lubricating coating tool, the tool matrix material is cemented carbide, and a toughened and reinforced in-situ reactive cubic boron nitride self-lubricating coating is deposited on the surface of the substrate. The coating is prepared by cladding the cubic boron nitride mixed powder by plasma spraying technology, and the weight percentage of each component in the cubic boron nitride mixed powder is: 60% CBN, 15% Ni60A, 8% WC, 3 %PbO, 3%Mo, 5%TiB 2 , 2% BNNTs, 2% CNTs, 2% graphene; after the cladding is completed, a micro-texture is processed on the surface of the tool.

[0032] A method for preparing a toughened and reinforced in-situ reactive micro-textured self-lubricating coating tool of the present invention comprises the following steps:

[0033] 1) Preparation of cubic boron nitride layer

[0034] (a) Pre-treatment: place the tool in alcohol and acetone solutions for ultrasonic cleaning for 30 minut...

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Abstract

The invention discloses a toughening and reinforcing in-situ reaction micro-texture self-lubricating coating cutter and a preparation method thereof. The base material of the tool is high-speed steel or hard alloy, and the surface of the base is made of PbO, Mo, TiB 2 A cubic boron nitride coating of , BNNTs, CNTs and graphene, the coating surface has a micro-texture; the coating is prepared by a plasma vacuum spraying method. The tool has good toughness as a whole, and the addition of BNNTs and CNTs makes the cubic boron nitride coating on the surface of the tool have good toughness, high surface hardness and wear resistance; during the cutting process, when the temperature is low, graphene can play a role Lubrication effect, PbO, Mo and TiB at high temperature 2 In situ reaction will occur to generate PbMoO with lubricating effect 4 、TiO 2 , B 2 o 3 Synergistically with the micro-texture, it can reduce the friction and wear of the tool during the cutting process and improve the tool life. The tool can be widely used in dry cutting and cutting of difficult-to-machine materials.

Description

technical field [0001] The invention relates to the technical field of mechanical cutting tool manufacturing, in particular to a toughened and reinforced in-situ reactive micro-textured self-lubricating coated tool and a preparation method thereof. Background technique [0002] As a new economical and environmentally friendly manufacturing technology, dry cutting has become a research hotspot in green processing. However, during dry cutting, the friction between the tool and chips on the rake face is extremely severe, resulting in increased tool wear and reduced tool life. Therefore, there is an urgent need to research and develop new cutting tools. Self-lubricating tool means that the tool material itself has the function of lubrication and anti-friction, and can realize self-lubricating cutting process without lubricating fluid, thereby reducing the friction and wear of the tool surface. [0003] Cubic boron nitride (CBN) has extremely high hardness and high temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B23K26/36
CPCB23K26/36C23C24/103
Inventor 邢佑强吴泽张克栋李燕凡黄开靓
Owner SOUTHEAST UNIV
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