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牙轮钻头滑动轴承的主要失效形式是胶合和磨粒磨损。钢结硬质合金GW50的力学性能介于硬质合金和合金钢之间，具有较高的弹性模量、硬度、抗弯抗压强度、冲击韧性和较好的冷热加工性能。试验分析表明，经料浆渗硼处理后，可进一步提高GW50钢结合金的表面硬度和耐磨性能，表面硬度可达1700HV0.2，弹性模量和冲击韧性值增加，摩擦系数更低，具有更好的综合性能，用于牙轮钻头滑动轴承是可行的。今后发展高速、重载和高寿命牙轮钻头的关键在于从轴承结构、材料和工艺寻找突破口。
The main failure form of roller cone bit bearings is gluing and abrasive wear. The mechanical properties of the cemented carbide GW50 are between cemented carbide and alloy steel, and have high elastic modulus, hardness, flexural strength, impact toughness and good hot and cold processing properties. The experimental results show that the surface hardness and wear resistance of GW50 steel can be further enhanced by the boronizing treatment, the surface hardness can reach 1700HV0.2, the elastic modulus and impact toughness increase, and the friction coefficient is lower Better overall performance for roller cone bit plain bearings is possible. The key to developing a high-speed, heavy-duty and high-life roller cone bit in the future lies in finding a breakthrough from the bearing structure, materials and workmanship.