Patent ID: 8584975

Claim:
A ball milling process for preparing hard alloy mixed materials, characterized in that there is utilized 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 deviations of the diameters of the alloy balls are less than or equal to 0.1 mm; tungsten carbide powders with grain sizes of 0.3 to 0.8 μm and ultra-fine cobalt powders with grain sizes less than 1.0 μm are used; ethyl alcohol is used as a grinding medium, and paraffin wax is used as a forming agent; the ball-powder ratio of the balls of hard alloy to the tungsten carbide powders and cobalt powders is 3:1; the rotating speed of the mixing arm is 100 to 135 rpm, and the ball milling time is 6 to 8 hours.