Ball milling process for preparing hard alloy mixture

US8584975B2 · kind B2 · utility

Assignee

• Jiangxi Rare Earth and Rare Metals Tungsten Group Corporation · CN

Inventors

• Yanjun Li · 安丰镇, CN
• Juanmei Zhong · 恩江镇, CN
• Zhifang Liu · Shanghai, CN
• Song Hu · Hubei, CN

Key dates

• Filing date: Dec 30, 2009
• Grant date: Nov 19, 2013
• Expiry date: Dec 16, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2009/043
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A ball milling process for preparing hard alloy mixture, characterized by utilizing a process of stirring ball milling, in which balls of hard alloy with diameters of 4 to 6 mm are used, the positive and negative deviation of the diameters of the alloy balls is less than or equal to 0.1 mm; tungsten carbide powders with particle sizes of 0.3 to 0.8 μm and cobalt powders are used; ethyl alcohol is used as a grinding medium, while paraffin wax is used as a forming agent. This process of ball milling has advantages of high efficiency, low energy consumption, ease of mass production, etc. and can be widely used in the preparation of hard alloy mixture.