摘要：【中文】本发明公开了失效渗碳淬火件直接激光熔覆的再制造方法，具体步骤为：①表面处理：对失效渗碳淬火件的基体表面进行表面处理，使其表面保持洁净且无氧化层；②激光熔覆：根据基体材料，选用熔覆材料，选定熔覆设备，设定熔覆时的工艺参数，对处理过的失效渗碳淬火件表面进行激光熔覆的再制造修复；③检验：对渗碳淬火件进行裂纹检测和硬度检测。步骤②激光熔覆时，使用的再制造修复材料为粉末材料，其粒度为150目至270目；组分的质量分数百分比含量如下：C：0.1～0.17wt.％；Cr：15～18.5wt.％Mn：0.3～1.00wt.％；Si：1.0～1.5wt.％；Mo：1.2～2.0wt.％；B：0.8～1.50wt.％；Ni：1.2～2.0，余量为Fe。本发明再制造方法无需去除渗碳层便可进行激光熔覆，熔覆层无裂纹，成形工艺性好。同时，熔覆层具备优异的耐磨性能。 【EN】The invention discloses a remanufacturing method for a failed carburized and quenched part through direct laser cladding, which comprises the following specific steps of ① surface treatment, namely surface treatment is carried out on the surface of a base body of the failed carburized and quenched part to keep the surface of the failed carburized and quenched part clean and free of an oxidation layer, ② laser cladding, cladding materials are selected according to base body materials, cladding equipment is selected, technological parameters during cladding are set, remanufacturing and repairing of the surface of the processed failed carburized and quenched part through laser cladding, ③ inspection is carried out, crack detection and hardness detection are carried out on the carburized and quenched part, in ② laser cladding, the remanufacturing and repairing materials are powder materials, the particle size of the remanufacturing and repairing materials is 150 meshes to 270 meshes, the remanufacturing and repairing method comprises the following components, by mass percentage, 0.1 wt% to 0.17 wt% of C, 15 wt% to 18.5 wt% of Mn, 0.3 wt% to 1.00 wt% of Si, 1.0 wt% to 1.5 wt% of Mo, 1.2 wt% to 2.0 wt% of B, 0.8 wt% to 1.50 wt% of Ni, Fe..0, the remanufacturing and the coating layer can be formed without the wear-resistant coating.