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分析了片状与球齿硬质合金的磨损情况。通过调整粒度、改进工艺制度，成功地研制出了G308中偏粗晶粒硬质合金。通过现场凿岩试验，其使用寿命明显提高。
The wear condition of flake and ball tooth cemented carbide was analyzed. By adjusting the particle size, improve the process system, successfully developed G308 partially coarse grain cemented carbide. Through on-site drilling test, its service life is obviously improved.