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Diamond film coating steel matrix composite material and preparation method thereof

A technology of diamond film and composite materials, applied in the direction of metal material coating process, coating, metal layered products, etc., to achieve high bonding strength and eliminate negative effects

Active Publication Date: 2012-07-11
HU-NAN NEW FRONTIER SCI & TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The second technical problem to be solved by the present invention is to provide a method for preparing a diamond film-coated steel-based composite material that not only solves the nucleation problem of diamond on the steel substrate, but also ensures that the diamond film and the substrate have a high bonding strength

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  • Diamond film coating steel matrix composite material and preparation method thereof
  • Diamond film coating steel matrix composite material and preparation method thereof
  • Diamond film coating steel matrix composite material and preparation method thereof

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preparation example Construction

[0074] In order to solve the above-mentioned second technical problem, the preparation method of the diamond film-coated steel-based composite material provided by the present invention comprises the following steps:

[0075] (1) Mechanically polish and remove oil stains on steel substrates;

[0076] (2) Prepare a layer of W—C—Co intermediate layer on the surface of the steel base material, wherein the mass percentage of Co is 1-30%.

[0077] (3) Surface treatment of the W-C-Co intermediate layer, including grinding and polishing, to control the surface roughness;

[0078] (4), carry out the pretreatment before the growth of diamond superhard wear-resistant layer to W-C-Co intermediate layer;

[0079] (5) A diamond superhard wear-resistant layer is prepared on the surface of the treated sample by chemical vapor deposition.

[0080] The preparation method of the W-C-Co intermediate layer described in the described step (2) includes all techniques that can be used to prepare t...

Embodiment 1

[0091] First, the W-C-Co intermediate layer was prepared on the carbon steel substrate by thermal spraying technology, and then Ti / Cu / Ti / Cu / ... / Ti / Cu / Ti / TiC was prepared on the W-C-Co layer by PVD technology Composite transition layer. Before chemical vapor deposition, the sample was ultrasonically treated with diamond powder acetone suspension for 5-60 minutes, the surface of the sample was cleaned with acetone and dried with a fan, and then the diamond film was prepared by HFCVD technology. During the chemical vapor deposition process, the distance between the sample and the filament is 5-20mm, using CH 4 and H 2 is the reaction gas, CH 4 The concentration is 0.5%-8%, and the deposition time is 5-6 hours. During the deposition process, the distance between the filament and the substrate is 5-20mm.

[0092] The surface morphology of the Ti / Cu / Ti / Cu / ... / Ti / Cu / Ti / TiC composite transition layer prepared on the thermal sprayed W-C-Co carbon steel substrate is as follows figu...

Embodiment 2

[0095] First, the W-C-Co intermediate layer was prepared on the carbon steel substrate by thermal spraying technology, and then the Ti / TiCN / TiC composite transition layer was prepared on the W-C-Co layer by PVD technology. Before chemical vapor deposition, the sample was ultrasonically treated with diamond powder acetone suspension for 5-60 minutes, the surface of the sample was cleaned with acetone and dried with a fan, and then the diamond film was prepared by HFCVD technology. During the chemical vapor deposition process, the distance between the sample and the filament is 5-20mm, using CH 4 and H 2 is the reaction gas, CH 4 The concentration is 0.5%-8%, and the deposition time is 5-6 hours. During the deposition process, the distance between the filament and the substrate is 5-20mm.

[0096] The surface morphology of the Ti / TiCN / TiC composite transition layer prepared on the thermal sprayed W-C-Co carbon steel base material is as follows Image 6 As shown; under this p...

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Abstract

The invention discloses a diamond film coating iron and steel matrix composite material and a preparation method thereof. The material is prepared by forming a W-C-Co middle layer and a diamond super-hard wear resistant layer on an iron and steel substrate. The preparation method comprises the following steps that: iron and steel serves as the matrix, the W-C-Co middle layer similar to a WC-Co hard alloy component is prepared on the matrix, and then the diamond super-hard wear resistant layer is prepared through a chemical vapor deposition technology. The preparation method of the W-C-Co middle layer mainly comprises the following steps: physical vapor deposition, chemical vapor deposition, thermal spraying technology and the like. The invention not only endows the surface of the iron andsteel substrate with the mechanical properties of a WC-Co hard alloy through the W-C-Co middle layer, but also solves the nucleation problem of diamond on the iron and steel substrate and ensures very high bonding strength between a diamond film and the substrate, and the composite material can be applied to dynamic sealing original pieces and mechanical processing tools, such as cutters, moulds and the like.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a diamond film-coated steel-based composite material and a preparation method and application thereof. Background technique [0002] Because diamond has excellent properties such as high hardness, high wear resistance, high thermal conductivity, low friction coefficient, low thermal expansion coefficient and good chemical stability, the development of diamond film coating tools is very rapid. [0003] At present, the research on diamond film-coated cemented carbide tools and ceramic tools is relatively mature, and the products have entered the market. Relatively speaking, the research progress of diamond film-coated steel substrate tools has been slow, and the problem of poor adhesion between diamond film and steel substrate has not been solved. However, compared with cemented carbide tools and ceramic tools, steel substrate tools have good comprehensive mechanical properties and low cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/04C23C16/27C23C16/02
Inventor 魏秋平余志明
Owner HU-NAN NEW FRONTIER SCI & TECH LTD
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