Research on Heat Treatment Process of High Strength Pearlite Steel For Rail
The microstructure transformation and hardness properties of a new high strength pearlite steel for rail testwere analyzed during cooling,and the CCT curve of the steel was established.On this basis,the thermal simulation test of the heat treatment process of the steel was carried out by orthogonal experimental design,and the optimal process was obtained.The initial cooling temperature should be 730 ℃,the cooling rate should be 3.5 ℃/s,and the final cooling temperature should be 510 ℃.This process can make the hardness of the steel after heat treatment reach more than 400HV with no ab-normal microstructure.
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