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Bionic-structure cubic boron nitride coating and preparation method thereof

A cubic boron nitride and boron nitride layer technology, applied in the coating, metal material coating process, superimposed layer plating and other directions, can solve the problems of insufficient fracture toughness and high residual stress of the cubic boron nitride coating, To achieve the effect of reducing residual stress, enhancing fracture toughness, and strong controllability

Active Publication Date: 2017-05-31
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a cubic boron nitride coating with a bionic structure, which aims to solve the above-mentioned series of problems caused by the high residual stress and insufficient fracture toughness of the existing cubic boron nitride coating

Method used

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  • Bionic-structure cubic boron nitride coating and preparation method thereof

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preparation example Construction

[0026] Correspondingly, the embodiment of the present invention also provides a method for preparing a cubic boron nitride coating with a biomimetic structure, comprising the following steps:

[0027] S01. Provide a base;

[0028] S02. Depositing M1B on said substrate x : M2 doped composite layer, in the M1B x : Deposit the M2 layer on the M2 doped composite layer; repeat the deposition M1B x : the step of M2 doping composite layer and M2 layer to obtain M1B x : A multi-layer composite structure formed by alternate deposition of M2 doped composite layer and M2 layer;

[0029] S03. Depositing a cubic boron nitride layer on the multilayer composite structure.

[0030] Specifically, in the above step S01, the substrate described in the embodiment of the present invention is the substrate to be deposited with a cubic boron nitride coating with a biomimetic structure, and the selection of the substrate is a conventional choice in the field, specifically high-speed steel, hard a...

Embodiment 1

[0043] to combine figure 1 , in the cubic boron nitride coating with biomimetic structure, Cr is used as transition layer 20, WB 2 : Cr / Cr is the multi-layer composite layer 30, W-B-N is the middle layer 40, and the cBN coating is the top coating 50. Taking the YG8 cemented carbide blade as an example, the following steps are adopted.

[0044] S111. Pre-treatment: First, sandblast the YG8 cemented carbide blade to remove surface scale and burrs; then spray the sample with water to remove the residue on the blade surface after sandblasting; then put the blade into Ultrasonic alkali cleaning for degreasing, the treatment time is 5-20min; then the blade is rinsed with clear water circulation, the time is 10-20min; after that, the sample is put into deionized water for ultrasonic cleaning for 10-20min, and then the surface is blown with dry nitrogen Dry, and then put the sample in a vacuum drying oven to dry; and clamp the dried sample on the turntable of the magnetron sputtering...

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Abstract

The invention is suitable for the technical field of vacuum coating, and provides a bionic-structure cubic boron nitride coating and a preparation method thereof. The bionic-structure cubic boron nitride coating is coated on a substrate, and consists of a bottom ductile layer and a top high-hardness layer, wherein the high-hardness layer is a cubic boron nitride layer; the ductile layer is in a multi-layer composite structure formed by alternate deposition of M2 layers and M1Bx:M2 doped composite layers; each M1Bx:M2 doped composite layer is formed by doping of M1Bx in M2; the M1 and the M2 are the same or different transition metal; and x is equal to or lager than 0.5 and equal to or smaller than 4.

Description

technical field [0001] The invention belongs to the technical field of vacuum coating, and in particular relates to a cubic boron nitride coating with a bionic structure and a preparation method thereof. Background technique [0002] Cubic boron nitride (cBN) has high hardness, high temperature strength, thermal stability and high chemical inertness to ferrous metals. It is ideal for cutting ferrous metals or alloys such as hardened steel, bearing steel, chilled cast iron and ultra-high strength steel. Tool material of choice for machining. Most of the most widely used cubic boron nitride tools in industry are polycrystalline cubic boron nitride (Polycrystalline Cubic Boron Nitride, PCBN) prepared by high temperature and high pressure method. The biggest problem faced by this method is: it can only be used to make It is difficult to process cutting tools with complex shapes such as drills, milling cutters, taps, dies, etc., and the high temperature and high pressure process...

Claims

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Application Information

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IPC IPC(8): C23C14/06C23C14/16C23C14/18C23C14/35
CPCC23C14/0647C23C14/165C23C14/185C23C14/352C23C28/324C23C28/347
Inventor 唐永炳蒋春磊
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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