Carburizing heat treatment process method for bearing ring of wind turbine generator

The invention relates to a carburizing heat treatment process method for a bearing ring of a wind turbine generator, and belongs to the technical field of heat treatment machining. The method comprises the following steps: carburizing; primary quenching; performing high-temperature tempering; carrying out secondary heating; carrying out secondary oil quenching; and low-temperature tempering. The high-temperature carburizing process is conducted in a strong carburizing and diffusion mode, meanwhile, accurate control over carbon potential is combined, the depth of a carburizing layer is larger, the uniformity is more excellent, the quality of the carburizing layer is improved, and meanwhile the internal stress sudden change situation is reduced; according to the large-size bearing ring obtained through the technological method, the hardness and the uniformity of a carburized layer are remarkably improved, the depth of the carburized layer is large, the requirement is met, the high surface structure grade can be