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30CrMnSiA 钢零件经盐浴加热后,在下贝氏体温度区(320～400℃)的碱液中等温冷却,具有良好的综合机械性能,并可获得银灰色的光亮表面。该工艺操作简便、生产效率高,在我厂已长期应用。1.工艺方法凡强度要求σ_b=120±10kgf/mm~2及σ_b=130±10kgf/mm~2,最大厚度或有效厚度小于12mm、最大直径小于12mm 实心圆柱,壁厚小于3mm 双面冷却的扁平和空心圆柱等非焊接零件,均可采用光亮等温淬火。等温冷却工艺参数是依据过冷奥氏体转
After the 30CrMnSiA steel parts are heated in a salt bath, they are isothermally cooled in a lye of the lower bainite temperature range (320-400 ° C), have good overall mechanical properties, and provide a shiny silver-gray surface. The process is easy to operate, high production efficiency, long-term application in our plant. 1. Process method Where the strength requirements σ_b = 120 ± 10kgf / mm ~ 2 and σ_b = 130 ± 10kgf / mm ~ 2, the maximum thickness or effective thickness of less than 12mm, the maximum diameter of less than 12mm solid cylinder wall thickness of less than 3mm double-sided cooling Flat and hollow cylinders and other non-welded parts, can be bright and isothermal quenching. Isothermal cooling process parameters are based on subcooled austenitic turn