Device for preparing incompletely covering coating on cemented carbide blade and method for preparing multilayer-coated cemented carbide blade

By setting multiple coating openings and an adjustable cover plate in the carbide cutting tool coating device, a multi-layer coating structure is prepared, which solves the problem of single coating structure and improves cutting performance and service life.

WO2026001193A1 Publication Date: 2026-01-02ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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Patent Information

Application Number
PCT/CN2025/088273
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-06-28
Filing Date
2025-04-10
Publication Date
2026-01-02

AI Technical Summary

Technical Problem

In the existing technology, the coating structure of cemented carbide inserts is simple and cannot simultaneously take into account multiple performance indicators such as wear resistance, heat resistance, impact resistance and high hardness. Moreover, the coating process is complicated, resulting in insufficient cutting performance and life.

Method used

An apparatus for preparing a partially covered coating for cemented carbide cutting tools is used, comprising a high-temperature coating furnace, a chassis, and a cover plate. By setting multiple coating openings and an adjustable cover plate in the coating furnace, the preparation of partially covered coating units is achieved. Combined with a multi-layer coating structure, the coating thickness can be adjusted according to cutting requirements.

Benefits of technology

It improves the cutting performance and service life of carbide inserts. By combining incompletely covered coating units and complete coatings, it meets the different cutting function requirements of different areas and achieves improved cutting performance of multi-layer coatings.

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Abstract

Disclosed in the present invention are a device for preparing an incompletely covering coating on a cemented carbide blade and a method for preparing a multilayer-coated cemented carbide blade. The device comprises a base plate (1) and / or a cover plate (2) which can be placed in a high-temperature coating furnace, wherein the base plate (1) is plate-shaped, and a cavity (3) capable of accommodating a blade to be coated (9) is formed on an upper surface (10); a back coating opening (4) penetrating through an outer peripheral surface of the base plate (1) is formed on a side surface (31) of the cavity (3), and the back coating opening (4) at least corresponds to any incompletely covering coating unit to be formed on a back cutting surface (92) of said blade (9); the cover plate (2) can cover a front cutting surface (91) of said blade (9), the cover plate (2) is provided with a front coating opening (5) penetrating through the upper and lower surfaces of the cover plate (2), and the front coating opening (5) at least corresponds to any incompletely covering coating unit to be formed on the front cutting surface (91) of said blade (9). By means of the device of the present invention, the method can achieve the preparation of a layer of incompletely covering coating units on the surface of the cemented carbide blade, and the prepared multilayer-coated blade is stable and reliable and has good coating performance.
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