Silicon carbide-nano-diamond composite coating, preparation method thereof and application thereof, cold-extrusion mould terrace die and mould

A nano-diamond and silicon carbide coating technology, applied in the direction of metal material coating process, coating, manufacturing tools, etc., can solve the problem of less use of cold extrusion dies, which is conducive to precision machining, improve production efficiency, reduce The effect of squeezing force

Pending Publication Date: 2019-12-13
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application of diamond coating on cutting tools and carbide wire drawing dies is more and more common, but it is less used on cold extrusion dies

Method used

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  • Silicon carbide-nano-diamond composite coating, preparation method thereof and application thereof, cold-extrusion mould terrace die and mould
  • Silicon carbide-nano-diamond composite coating, preparation method thereof and application thereof, cold-extrusion mould terrace die and mould
  • Silicon carbide-nano-diamond composite coating, preparation method thereof and application thereof, cold-extrusion mould terrace die and mould

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preparation example Construction

[0059] According to a second aspect of the present invention, a method for preparing the above-mentioned silicon carbide-nanodiamond composite coating is provided, comprising the following steps:

[0060] A silicon carbide coating and a nano-diamond coating are sequentially deposited on the surface of a substrate by a hot wire vapor deposition method to obtain a silicon carbide-nano-diamond composite coating.

[0061] Hot wire chemical vapor deposition (hot wire CVD) is one of the chemical vapor deposition methods. This method is mainly to thermally decompose hydrocarbon gas to produce SP which is necessary for synthetic diamond. 3 A group of carbon atoms that hybridize orbitals.

[0062] The method of hot wire chemical vapor deposition is not limited, and conventional hot wire chemical vapor deposition devices and / or processes can be used, and it can be a common hot wire method, or other improved hot wire methods such as electronic assistance.

[0063] The step of sequential...

Embodiment 1

[0108] Example 1 Preparation of silicon carbide-nano-diamond composite coating for cold pier die punch of cylindrical part

[0109] The cold extrusion die punch of the cylindrical part is used as a substrate, and a silicon carbide-nanometer diamond composite coating is prepared thereon, comprising the following steps:

[0110] (1) Carry out white corundum wet sandblasting treatment on the punch, the sandblasting pressure is 400kPa, the sand particle size is 800 mesh, and the sandblasting time is 1min; then the punch is ultrasonically cleaned in acetone and alcohol for 10min;

[0111] (2) The silicon carbide coating is prepared by the hot wire chemical vapor deposition method, and hydrogen, methane and silane are used as reaction gases to deposit a silicon carbide coating on the surface of the pretreated punch. The deposition conditions include: the methane gas flow rate is 10 sccm, The hydrogen gas flow rate is 1000 sccm, the silane gas flow rate is 10 sccm, the vacuum chamber...

Embodiment 2

[0114] Example 2 Preparation of Silicon Carbide-Nanodiamond Composite Coating of Cylindrical Part Cold Pier Die Punch

[0115] The cold pier mold punch of the cylindrical part is used as a substrate, and a silicon carbide-nanodiamond composite coating is prepared thereon, comprising the following steps:

[0116] (1) Carry out wet sandblasting treatment of white corundum on the punch, the sandblasting pressure is 300kPa, the sand particle size is 900 mesh, and the sandblasting time is 1min; then the punch is ultrasonically cleaned in acetone and alcohol for 15min;

[0117] (2) The silicon carbide coating is prepared by hot wire chemical vapor deposition, with hydrogen, methane and silane as reaction gases, and the silicon carbide coating is deposited on the surface of the pretreated punch. The deposition conditions include: methane gas flow rate is 20sccm, The hydrogen gas flow rate is 1000 sccm, the silane gas flow rate is 20 sccm, the vacuum chamber pressure is kept at 4kPa, ...

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Abstract

The invention discloses a silicon carbide-nano-diamond composite coating, a preparation method thereof and application thereof, a cold-extrusion mould terrace die and a mould, and relates to the technical field of diamond coating preparation. The silicon carbide-nano-diamond composite coating sequentially comprises a silicon carbide coating and a nano-diamond coating, which are in contact with a base body. The preparation method for the silicon carbide-nano-diamond composite coating comprises the following step of adopting a hot filament chemical vapor deposition method to sequentially depositthe silicon carbide coating and the nano-diamond coating on the surface of the base body. The invention further provides application of the composite coating in a cold-extrusion mould as well as theco-extrusion mould terrace die and the mould. A silicon carbide intermediate layer can effectively improve binding force between the coating and the base body, and blocks cobalt in the block body fromdiffusing into the diamond layer to catalyze graphite to reduce wear resistance of the diamond coating, and a nano-dimension diamond film is beneficial for reducing surface roughness of the coating.The silicon carbide-nano-diamond composite coating is applied to the cold-extrusion mould terrace die, so that the service life of the terrace die is prolonged, friction force between the terrace dieand a workpiece is reduced, and product quality is improved.

Description

technical field [0001] The invention relates to the technical field of diamond coating preparation, in particular to a silicon carbide-nanometer diamond composite coating, a preparation method and application thereof, a cold extrusion die punch and a die. Background technique [0002] Due to the characteristics of high hardness, good thermal conductivity, low friction, super wear resistance, and stable structure of diamond, diamond coating has been widely used in the fields of cutting tools and parts, and the most widely used is diamond-coated carbide cutting tools. At present, diamond coatings are also used in wire drawing dies. For example, patent CN 102586756A discloses a microporous diamond coating device and coating preparation method for wire drawing dies. Patent CN 101280423A discloses a preparation of small-diameter diamond-coated wire drawing dies. Method, patent CN 101280422A discloses a batch preparation device for diamond-coated wire drawing dies. These are all d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/27C23C16/32B21J13/02
CPCC23C16/271C23C16/325B21J13/02
Inventor 唐永炳陈波王陶杨扬
Owner SHENZHEN INST OF ADVANCED TECH
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