39results about How to "Avoid early wear" patented technology

The invention discloses a process of a double-hearth continuous rare earth carburizing equipment. A through type continuous rare earth carburizing furnace comprises double hearths which are arranged in a Z shape, wherein a first hearth is a carburizing speed control hearth and is divided into I, II and III zones; and a second hearth is a carburized layer structure control hearth and is divided into IV and V zones. The two hearths are communicated or partitioned through a gate, and a material tray in the III zone is pushed to the IV zone by utilizing a transverse material-pushing mechanism. Operation parameters of basic processes of the zones are that: in the first hearth, the temperature of the zone I is 860 to 880 DEG C, and Cp is uncontrolled; the temperature of the zone II is 920 DEG C, and Cp is 1.20-1.25 percent; and the temperature of the zone III is 930 DEG C, and Cp is 1.30 to 1.4 percent; in the second hearth, the temperature of the zone IV is 880 to 890 DEG C, and the Cp is 1.1 to 1.2 percent; and the temperature of the zone V is 860 to 840 DEG C, and Cp is 0.9 to 1.0 percent. The carbon potential control accuracy of furnace gas is improved and the mutual interference is reduced, so the setting and adjustment of process parameters are simpler and easier, and the stability and reliability of process operation are greatly improved. By the process, the carburizing cycle is further shortened, and the work efficiency is improved by over 30 percent; moreover, the optimal metallographic structure is easy to obtain, so that the service life of a product is prolonged.