WC-Ni-Fe coated WC-Co structure hard alloy and preparation method thereof

The preparation method of WC-Ni-Fe coated WC-Co structure cemented carbide solves the contradiction between hardness and toughness in traditional WC-Co cemented carbide, and achieves a synergistic improvement in high hardness, high wear resistance and high impact toughness, expanding application scenarios and reducing costs.

CN122445994APending Publication Date: 2026-07-24GANZHOU NONFERROUS METALLURGICAL RES INST
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Patent Information

Application Number
CN202610869453.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-16
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Traditional WC-Co cemented carbide presents a contradiction in terms of hardness and toughness, making it difficult to meet the needs of use under complex working conditions. Existing new cemented carbide suffers from performance shortcomings, insufficient stability, high cost, and limited applicability.

Method used

The preparation method of WC-Ni-Fe coated WC-Co structure cemented carbide adopts a step-by-step pre-sintering and dual-system powder compounding method to form a core-shell composite structure, which combines the high hardness of WC-Co cemented carbide and the high toughness of WC-Ni-Fe cemented carbide to achieve complementary performance.

Benefits of technology

This achieves a synergistic match between the high hardness, high wear resistance, and high impact toughness of cemented carbide, thereby improving product lifespan and application scenarios, reducing costs, and enhancing environmental friendliness.

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Abstract

The invention belongs to the technical field of hard alloys, and particularly relates to a WC-Ni-Fe coated WC-Co structure hard alloy and a preparation method thereof. According to the method, WC-Co and WC-Ni-Fe hard alloy pretreatment materials with different strengths are obtained through pre-sintering, so that the two pretreatment materials can keep respective independent structures and can be uniformly mixed on the premise that the particle size difference is controllable. And then secondary ball milling, compounding and mixing are carried out, sintering is carried out, and the WC-Ni-Fe coated WC-Co structure hard alloy is obtained. The WC-Ni-Fe coated WC-Co structure hard alloy provided by the invention has ultrahigh hardness, high wear resistance, excellent impact toughness, good structural stability and controllable cost, is a composite structure hard alloy adaptive to various complex working conditions, and solves the technical problems of unbalanced toughness, single performance, poor environmental protection property and limited applicability of the traditional hard alloy.
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