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目前,轴承零件常用缓冷球化退火和等温球化退火工艺。我厂客车轴承套圈的球化退火,原在台车炉及箱式炉中进行,采用缓冷球化退火工艺,其缺点是退火周期较长,工件脱碳层较深,组织不易均匀,质量不易保证,而且只能进行小批量生产,工人劳动强度也较大。为了提高退火质量,节约能源,采用了等温球化退火工艺,并购置一台南京摄山电炉厂制造的RJT-160型推杆式连续退火炉。经工艺调试投入生产,效果良好。等温球化退火的周期较短,工件氧化脱碳的倾向减少,
At present, bearing parts commonly used slow ball annealing and isothermal ball annealing process. My factory bus bearing ring ferrule annealing, the original trolley furnace and box furnace, the slow cold ball annealing process, the disadvantage is the longer annealing cycle, deep decarburization of the workpiece, the organization is not easy uniform, Quality is not easy to guarantee, but only for small batch production, workers also have greater labor intensity. In order to improve the quality of annealing, energy conservation, the isothermal ball annealing process, and the acquisition of a Nanjing Furnace plant manufactured RJT-160-type push rod continuous annealing furnace. Commissioned by the process of production, the effect is good. Isothermal ball annealing cycle is shorter, the tendency of the workpiece oxidation decarbonization decreases,