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为了确定18CrNiMo7-6钢牙轮钻头轴承的最优渗碳面和最优扩散系数,通过建立数值计算模型、扩散系数模型和物理模型,对两种可选择的渗碳面以及不同扩散系数的渗碳结果分别进行对比研究,并对最优结果进行验证。结果表明:牙轮钻头轴承最优的渗碳面是外表面,最优的扩散系数为1.5×10~(-6)m~2/s,满足了牙轮钻头轴承表面耐磨、芯部具有韧性的要求,为制定合格的渗碳工艺提供理论支撑。
In order to determine the optimal carburization surface and the optimal diffusion coefficient of 18CrNiMo7-6 steel roller cone bit bearing, numerical simulation model, diffusion coefficient model and physical model were established to simulate the permeability of two optional carburized surfaces and different diffusion coefficients Carbon results were compared, respectively, and the best results were verified. The results show that the optimum carburizing surface of roller bit bearing is the outer surface, and the optimal diffusion coefficient is 1.5 × 10 -6 m -2 / s, which satisfies the bearing surface of roller cone bit wear-resistant and the core has Toughness requirements for the development of qualified carburizing process to provide theoretical support.