Based on analyzing the failure mechanism of the gear rim of disk bit, the strengthened methods of the antifriction alloy welded on the surface of the gear rimand hard alloy gear rim inlayed.

• 在对盘式钻头齿圈失效机理分析的基础上,提出了齿圈表面堆焊耐磨合金强化方法和镶嵌硬质合金齿圈强化方法,通过试验研究和对比分析,确定了冶金混合烧结固齿法镶嵌硬质合金齿圈强化盘式钻头。