Ceramic binder phase gradient cemented carbide tool material and method for producing the same

By employing cubic TiN and hexagonal close-packed ZrO2 as composite ceramic binder phases, combined with nano-graphene and silicon carbide nanowires, a multi-level ceramic binder phase gradient cemented carbide tool material was prepared. This solved the problems of insufficient high-temperature performance, oxidation resistance and toughness of traditional cemented carbide, and achieved a combination of high hardness and high toughness, making it suitable for high-speed cutting and green manufacturing.

CN118580077BActive Publication Date: 2026-04-14SHANDONG UNIV SHENZHEN RES INST +1
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Patent Information

Application Number
CN202410648624.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-05-23
Publication Date
2026-04-14
Estimated Expiration
2044-05-23

AI Technical Summary

Technical Problem

Existing cemented carbide tool materials have shortcomings in terms of high-temperature performance, oxidation resistance, corrosion resistance, and toughness. Furthermore, the introduction of Co leads to increased material costs and thermal stress problems during the manufacturing process, making it difficult to meet the needs of high-speed cutting and green manufacturing.

Method used

A multi-level ceramic binder phase gradient cemented carbide tool material was prepared by using cubic TiN and hexagonal close-packed ZrO2 as composite ceramic binder phases, combined with nano-graphene and silicon carbide nanowires, through a two-step spark plasma sintering process, achieving a combination of high hardness and high toughness.

Benefits of technology

A ceramic-bonded phase gradient cemented carbide tool material with both high hardness and high toughness was prepared. It is suitable for high-speed machining of difficult-to-machine materials, meets the requirements of green manufacturing, and is easy to industrialize.

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Abstract

The present application belongs to the technical field of hard alloy material, and particularly relates to a ceramic binder phase gradient hard alloy cutter material and a preparation method thereof. The present application takes cubic structure TiN and hexagonal closest packing structure ZrO2 as a composite ceramic binder phase, cooperates solid solution activation sintering and micro liquid phase strengthening sintering, and sets the grain size as nanometer scale, cooperates silicon carbide nanowire and two-step discharge plasma sintering, and comprehensively uses various sintering advantages to realize high density configuration of the ceramic binder phase hard alloy cutter material. The present application combines component toughening and structure toughening, designs a multi-level organization configuration of micro layer and macro gradient, prevents and eliminates cracks layer by layer, essentially breaks through the old thought of simple composite of complex components, proposes to load traditional toughening phase by low-dimensional toughening phase (graphene, silicon carbide nanowire), introduces traditional toughening mechanism and new toughening mechanism such as graphene, and simultaneously applies gradient structure to introduce surface residual compressive stress toughening, and finally forms a multi-level toughening mechanism with multi-element and multi-scale characteristics.
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