前言汽车后桥螺伞齿轮是汽车传动邮件的重要零件,对热处理后的性能、变形情况,都有较高的要求。国外多数采用可控气氛渗碳,淬火压床淬火的工艺过程。我厂自1985年底接至上海同济齿轮厂的委托,在国产RM—75—9D滴注箱式气体滲碳炉上(以甲醇—苯为渗剂),用CO_2—CH_4红外仪监控渗 Preface Automobile rear axle spiral bevel gear is an important part of the vehicle transmission mail, after the heat treatment performance, deformation, have higher requirements. Most foreign controlled carburizing atmosphere, quenching press quenching process. I plant from the end of 1985 connected to the Shanghai Tongji Gear Factory commissioned by the domestic RM-75-9D drip box gas carburizing furnace (methanol - benzene penetration agent), with CO_2-CH_4 infrared monitoring infiltration