Device for preparing boron-doped diamond composite coating on surface of cutter

Abstract

The invention discloses a device for preparing a boron-doped diamond composite coating on the surface of a cutter, belonging to the technical field of cutters. The device comprises a reaction hood, an alloy drilling bit, a supporting table, a cooling device, a direct current voltage bias power supply, a heat wire power source, air pressure control device, a high-temperature resistant spring, a heat wire and a drilling bit bracket, wherein the alloy drilling bit and the high-temperature resistant spring are respectively and vertically arranged on the drilling bit bracket; two ends of the heat wire are respectively connected with the high-temperature resistant spring; the drilling bit bracket is fixed on the supporting table and the cooling device; the reaction device is fixed on the supporting table and the cooling device and the outer part of the drilling bit bracket is connected with the air pressure control device; the direct current voltage bias power source is respectively connected with the heat wire and the shell of the reaction hood; and the heat wire power source is respectively connected with the heat wire and the high-temperature resistant spring. The invention can ensure excellent adhesive strength between a diamond composite film and a matrix and can effectively improve the surface quality and the uniformity of the diamond film, thereby improving the service life and the cutting performance of the cutter with the diamond film coating.

Description

technical field [0001] The invention relates to a device in the technical field of tool manufacturing, in particular to a device for preparing a boron-doped diamond composite coating on the surface of a hard alloy tool with complex shapes. Background technique [0002] Diamond films have many excellent properties close to natural diamonds, such as high hardness, large elastic modulus, low friction coefficient, strong wear resistance, and stable surface chemical properties. Therefore, diamond films are used as wear-resistant, anti-friction or protective coatings. The material has broad application prospects in the fields of tools, molds and wear-resistant devices. The chemical vapor deposition method (Chemical VaporDeposition, referred to as CVD method) is not restricted by the shape of the substrate, and can be directly deposited on the surface of the substrate with complex shapes, which is very suitable for the preparation of diamond film coating tools with complex shapes. ...

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Problems solved by technology

However, this method is to carry out boronizing treatment on the tool substrate under static conditions before the growth of the diamond film. Although it can inhibit the cobalt element inside the tool substrate from diffusing to the surface to a certain extent, the static boronizing pretreatment It needs to be carried out under high temperature conditions, not only the operation process is complicated, time-consuming and energy-consuming, but also it is easy to change the material properties of the tool

In addition, this method also cannot effectively suppress the thermal diffusion of the cobalt element inside the cemented carbide substrate to the surface of the substrate during the long-term high-temperature deposition of the diamond film.

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