Specific annealing process of Asp60 high speed steel

1、 Ordinary (slow cooling) spheroidizing annealing, slow cooling is suitable for most steel grades, especially when the furnace loading is large, the operation is convenient, but the production cycle is long; 2、 Isothermal spheroidizing annealing is applicable to most steel types, especially those difficult to spheroidize and those with high spheroidizing quality requirements (such as rolling bearing steel); Its production cycle is shorter than ordinary spheroidizing annealing, but it needs a furnace that can control the cooling rate before eutectoid transformation; 3、 Periodic spheroidizing annealing is applicable to steel with lamellar pearlite structure. Its production cycle is also shorter than that of ordinary spheroidizing annealing. However, under the condition of large furnace loading, it is difficult to change the temperature according to the control requirements, so it is not widely used in production; 4、 Low temperature spheroidizing annealing is suitable for steel processed by cold deformation and quenched and hardened steel (the latter is usually called high temperature softening tempering); 5、 Deformation spheroidization annealing and deformation processing can accelerate spheroidization. The combination of deformation processing and spheroidization can shorten the spheroidization time. It is suitable for cold and hot formed steel parts and steel (such as strip).