Process for preparing diamond covering on sintered-carbide tool

A technology of diamond coating and cemented carbide, which is applied in the direction of metal material coating process, coating, gaseous chemical plating, etc., and can solve the problems of low adhesion of diamond coating and complicated preparation process of coating transition layer, etc.
CN1632165AInactive Publication Date: 2005-06-29UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2005-06-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for preparing a diamond coating on a cemented carbide tool. Using plasma CVD technology, a gas mixture containing hydrogen, carbon and silicon is used as the reaction gas to deposit a diamond coating containing diamond phase and silicon on the cemented carbide tool; among them, silicon is carried out in the CVD process of the diamond coating At the same time, it is deposited into the diamond coating and at the interface between the diamond coating and the cemented carbide tool; the existence and enrichment of silicon at the interface of the diamond coating and the cemented carbide tool make the diamond coating more effective on the cemented carbide tool. Tools form high adhesion. The CVD technology includes: microwave plasma CVD technology, hot wire CVD technology, direct current arc plasma CVD technology. The invention has the advantages of effectively improving the adhesion of the diamond coating and simplifying the preparation process of the coating.
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Description

technical field

[0001] The invention belongs to the technical field of diamond coatings, and in particular provides a method for preparing a diamond coating on a hard alloy tool, which can be applied to coating a diamond coating with high adhesion on the surface of a hard alloy tool and its Corresponding diamond-coated carbide tools. Background technique

[0002] Diamond-coated cemented carbide tools not only have the characteristics of high diamond hardness and low friction coefficient, but also have the characteristics of good toughness, low cost and strong shape adaptability of cemented carbide, so they are widely used in various fields of national economy prospect. However, the problem of low adhesion between diamond coating and cemented carbide tool substrate has always been an important factor restricting its application. This is mainly because, when the diamond coating is deposited on WC-Co cemented carbide tools by chemical vapor deposition (CVD), the binder phase ...

Claims

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