蜗杆是机械传动设备中的主要零件,为了提高蜗杆使用寿命,通常蜗杆齿面应进行化学热处理。一般中小型工厂只有RJT-90-9T型甚至更小的普通渗碳炉,当蜗杆长度超过其有效深度时,就难以进行处理。本文所述是超长蜗杆在普通井式炉中进行碳氮共渗 Worm gear is the main part of mechanical transmission equipment. In order to improve the service life of the worm, the worm gear should usually be subjected to chemical heat treatment. General small and medium-sized factories only RJT-90-9T even smaller ordinary carburizing furnace, when the worm length exceeds its effective depth, it is difficult to deal with. This article describes the long worm in a common pit furnace carbonitriding