Preparation method of diamond coated cutting tool

A diamond coating and diamond technology, applied in metal material coating technology, coating, superimposed layer plating, etc., can solve the problems of unfavorable industrial production and practical application, long time, etc., to improve the processing effect and reduce the edge Chipping and reduced processing costs
CN107267984AInactive Publication Date: 2017-10-20ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
Publication Date
2017-10-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of a diamond coated cutting tool. The preparation method comprises the following steps: (1) corroding a cutting tool base body; (2) depositing a Cr / CrN transition layer; and (3) depositing a diamond coating. With adoption of the preparation method, the binding force between the diamond coating and a hard alloy base is effectively improved, Co diffusion is also restrained, and nucleation and growth of the diamond coating are facilitated to form the diamond coating with high adhesive force; after depositing the diamond coating, contents of Co on the surface layer and the interior of the hard alloy are basically kept consistent, so that Co deficiency on the surface layer does not cause strength reduction of the cutting tool, and the Cr / CrN transition layer facilitates keeping of keenness of the cutting edge of the cutting tool.
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Description

technical field

[0001] The invention belongs to the field of preparation of hard alloy diamond-coated cutting tools, and relates to a preparation method of diamond-coated cutting tools, in particular to an acid-base corrosion pretreatment process and a transition layer to improve the combination of diamond coating and hard alloy substrate Preparation method of diamond-coated cutting tools for high strength. Background technique

[0002] Diamond has high hardness, and the diamond coating prepared by hot wire chemical vapor deposition (HFCVD) can be deposited on the complex-shaped cemented carbide tool substrate. Composite materials and AlSi alloys and other materials have a relatively high service life, which is more than 10 times that of ordinary carbide tools, and have high cost performance and market prospects.

[0003] There are two points to overcome in the combination of diamond coating and cemented carbide substrate. First, the thermal expansion coefficients between ...

Claims

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