Points for attention in quenching guide rails with high frequency induction heating machine

a. Selection of moving speed of the machine tool Under certain conditions of other process parameters, the slower the moving speed, the deeper the hardened layer, but the production efficiency will be reduced. If the moving speed is too slow, the surface hardness will be reduced instead, so the moving speed should be controlled within the range of 1.2-3mm/s.

b. The choice of quenching heating temperature is the key. The most suitable quenching heating temperature should be above the austenitizing temperature, and the phosphorus eutectic melting point should be below 957°C. Generally, the temperature range of 900-950°C is suitable.

c. Quenching medium: Due to the presence of a large amount of graphite in cast iron, the heat conduction rate is reduced, and at the same time, the effect of Si and Mn element 1 reduces the critical cooling rate. Therefore, the high-frequency induction heating surface quenching of cast iron guide rails does not require very high cooling capacity of the quenching medium. Generally, tap water is used for cooling, and the water pressure is 0.1～0.15MPa. CA6140 lathe bed guide rail (total length 1600mm).