An impact-resistant hard metal for an anvil and a method of making the same

By combining multi-element metal powders and composite particles, the problem of uneven particle distribution in impact-resistant cemented carbide was solved, improving the material's impact resistance and toughness, and achieving a coordinated improvement in hardness and strength.

CN122235554APending Publication Date: 2026-06-19YUFENG SUPERHARD MATERIAL TECH (SUZHOU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YUFENG SUPERHARD MATERIAL TECH (SUZHOU) CO LTD
Filing Date
2026-04-02
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In the preparation process of existing impact-resistant cemented carbides, the particle distribution is uneven, which easily leads to local segregation, interface enrichment and discontinuous transition regions. This results in an unstable load transfer path, stress concentration under impact, and limited compatibility between reinforcing particles and bonding phases, which easily leads to brittle connections and crack initiation channels.

Method used

By combining multi-element metal powders, tungsten-niobium-tantalum carbonitride microspheres, molybdenum-tungsten carbide-cobalt-nickel composite particles, and cobalt-nickel-iron-aluminum-titanium-tungsten pre-alloyed particles, a stable composite structure is formed through vacuum induction melting and inert atmosphere treatment, thereby improving the crack resistance, toughness, and load-bearing capacity of the material.

Benefits of technology

This study improved the overall stability and toughness of cemented carbide under impact loads, enhanced transverse fracture strength, compressive yield strength, and ultimate compressive strength, reduced the tendency of crack propagation, and maintained a balance between high hardness and toughness.

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Abstract

This invention discloses an impact-resistant cemented carbide for preparing a top hammer and its preparation method, belonging to the field of alloy preparation technology. It is used to solve the technical problem that the impact resistance and toughness of alloys for preparing top hammers in the prior art need to be further improved. This invention provides an impact-resistant cemented carbide by synergistically introducing tungsten-niobium-tantalum carbonitride microspheres, cobalt-nickel-iron-aluminum-titanium-tungsten pre-alloyed particles, and molybdenum-tungsten carbide-cobalt-nickel composite particles into the cemented carbide system. This allows multiple reinforcing and regulating units to cooperate with each other in the microstructure, constructing a multi-scale composite structure. This can improve the microstructure uniformity and interface coordination, optimize the load transfer mode and crack propagation path, and enhance the microstructure stability and service reliability of the material under impact conditions.
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