我所为前进化工厂承担了一批三十万吨聚乙稀设备备件──硬质合金球的试制任务。过去这种件随机由日本进口,不仅价格昂贵,又是易损件,依靠外购总不是办法,唯一办法是自己制造。利用现有设备加工硬质合金球,是不能采用普通钢球加工工艺方法的。硬质合金球从碎末到成胚,硬度已在HRA90度左右,一般钢球粗加工软搓这道工序就不能采用。其次,成胚后的加工余量在一毫米左右,这样高的硬度要搓去整个加工余量相当困难。由此可见,直接研磨不仅效率低,研磨料的 I undertook a trial of a batch of 300,000 tons of polyethylene spare parts for the Progressive Chemical Plant - the trial of cemented carbide balls. In the past this piece imported from Japan at random, not only expensive, but also wearing parts, relying on outsourcing is not the solution, the only way is to create their own. The use of existing equipment processing cemented carbide ball, can not be used ordinary ball processing technology. Carbide ball from the broken into the embryo, the hardness has been about HRA90 degrees, the general process of soft steel ball rough rubbing this process can not be used. Second, the processing margin into a embryo after a millimeter, such a high hardness to rub the entire processing margin is quite difficult. Thus, direct grinding is not only inefficient, abrasive material