Patent Number: 8,584,975

Title: Ball milling process for preparing hard alloy mixture

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 .mu.m 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.

Inventors: Li; Yanjun (Jiangxi, CN), Zhong; Juanmei (Jiangxi, CN), Liu; Zhifang (Jiangxi, CN), Hu; Song (Jiangxi, CN)

Assignee: Jiangxi Rare Earth and Rare Metals Tungsten Group Corporation

International Classification: B02C 25/00 (20060101); B02C 17/14 (20060101)

Expiration Date: 1/19/12018