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综合评述了凿岩用硬质合金烧结表面状态、表面加工处理方法及钎焊工艺要求，指出正确的表面加工处理工艺可提高钎头质量稳定性、降低碎片串，对进一步采用低钴耐磨硬质合金提高钎头寿命具有重要意义。
The condition of surface treatment, surface treatment and brazing process are summarized. The correct surface treatment process can improve the quality stability of the drill bit and reduce the debris string. For the further use of low cobalt wear-resistant hard Cemented carbide to improve the life of the drill is of great significance.