A fine-particle tungsten carbide powder with a high bulk specific gravity for cemented carbide rods and a method for preparing the same
By employing a dry process route of compaction, carbonization, and airflow pulverization, along with a specific ternary composite inhibitor system, the problem of achieving both particle size and bulk density of ultrafine tungsten carbide powder has been solved, enabling the industrial production of high-performance cemented carbide rods.
Patent Information
- Application Number
- CN202610551468.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to prepare tungsten carbide powder that combines submicron-level ultrafine grains, high bulk density, high chemical purity, and good toughness. Traditional processes suffer from problems such as difficulty in achieving both particle size and bulk density, high oxygen content, and uncontrolled carbon balance.
A dry process route of compaction densification carbonization and air jet milling is adopted, combined with a specific ternary composite inhibitor system. High-pressure densification pre-agglomeration and air jet shaping are used to prepare high-ratio fine-particle tungsten carbide powder, avoiding the introduction of organic forming agents and achieving low oxygen and low carbon residue.
The prepared tungsten carbide powder has submicron-level ultrafine particle size, high bulk density and high tap density, which significantly improves flowability and formability, and significantly enhances the strength and toughness of the alloy, making it suitable for the production of high-performance cemented carbide rods.
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Figure CN122403455A_ABST