一种中颗粒钨粉及其制备方法
By employing low bulk density tungsten trioxide powder and a staged heating reduction process, combined with hydrogen control, the problems of irregular shape and high oxygen content of medium-sized tungsten powder were solved, resulting in more efficient reduction and better product performance.
CN121945784BActive Publication Date: 2026-07-17CHONGYI ZHANGYUAN TUNGSTEN
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGYI ZHANGYUAN TUNGSTEN
- Filing Date
- 2026-03-27
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Medium-sized tungsten powder exhibits irregular particle shapes, incomplete reduction, and fine agglomeration with high oxygen content, which affects the performance and quality of subsequent products.
Method used
Low bulk density tungsten trioxide powder is used, and a staged heating reduction process is employed, combined with hydrogen flow rate, return hydrogen pressure and dew point control, to ensure complete reduction of tungsten oxide. The powder is then sieved to obtain medium-sized tungsten powder with regular morphology.
Benefits of technology
It improves hydrogen utilization, reduces oxygen content, ensures complete development and regular morphology of tungsten powder particles, improves flowability and mixing uniformity, and enhances product density and strength.
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Figure CN121945784B_ABST
Abstract
本申请属于钨粉末制备技术领域，具体为一种中颗粒钨粉及其制备方法，所述制备方法如下：获取费氏粒度为3~6µm、比表面积为4.5~8.5m2 / g、松装密度为1.5~2.2g / cm3的三氧化钨粉末；采用氢气在650~700℃、800~850℃、1000~1050℃下，对三氧化钨粉末分别进行还原，过筛后得到中颗粒钨粉。本申请通过选用低松装密度氧化钨粉及采用分阶段升温还原，能提高氢气利用率，降低氧化钨中的氧含量，使得其还原更彻底；通过控制低氢气流量、回氢压力及露点，确保氧化钨彻底还原且挥发沉积效应显著，使得钨粉发育完整、形貌规则、无未还原彻底 / 氧含量高的细小团聚颗粒。
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