Preparation method of GNCD-CBN nanocomposite multi-layer coating tool with toughening mechanism

A nano-composite, multi-layer coating technology, applied in the direction of coating, metal material coating process, superimposed layer plating, etc., can solve the problems of poor bonding performance between coating and cemented carbide substrate, and low coating toughness. , to achieve the effect of improving wear resistance, improving coating toughness and extending tool life
CN108220916BActive Publication Date: 2019-08-27NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2019-08-27

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Abstract

The invention provides a preparation method of a nano composite GNCD-cBN multilayer coated cutter having toughening mechanism, wherein the composite coating is formed through alternate growth of gradient nano-crystalline diamond (GNCD) and cubic boron nitride (cBN). The GNCD coating is a gradually-varying coating layer, wherein the internal structure of the GNCD coating is in a gradient arrangement of high-content sp3 carbon + high-content sp2 carbon + high-content sp3 carbon. The coating has the hardness of the cBN and can be used for cutting ferrous metal material such as high-temperature alloy and high-strength steel; by means of the GNCD, thickness of the coating layer can be increased, and toughness of the coating during cutting process can be improved and strength and anti-impact performance of the coating are totally improved. The method significantly improves wear resistance of the coating cutter and prolongs the service of the cutter.
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Description

technical field

[0001] The present invention relates to a kind of superhard material film preparation technology, especially a kind of preparation method of GNCD / cBN nanometer multi-layer composite coating tool, specifically a kind of using microwave chemical vapor deposition or hot wire chemical vapor deposition combined with radio frequency magnetic A method for alternately depositing gradient nano-diamond coatings and cubic boron nitride nano-coatings on cemented carbide tool substrates by controlled sputtering deposition. Background technique

[0002] With the rapid development of my country's aerospace and other modern manufacturing technologies, more and more high-strength and ultra-high-strength steels are used in aerospace vehicles. However, with the wide application of difficult-to-machine materials such as titanium alloys, high-temperature alloys, and high-strength ultra-high-strength steels; advanced high-speed ultra-high-speed cutting, high-speed hard cutting, gr...

Claims

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