What is the structure of 20CrMnTi quenching?
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What is the structure of 20CrMnTi after quenching? How high is the strength, impact resistance and hardness? Thank you.
During quenching in the Ac1~Ac3 dual-phase zone, as the quenching temperature increases, the amount of iron cables in the structure decreases, and its shape gradually changes from large blocks to fine flakes and islands.； The strength, hardness and plasticity of steel are increased ； Quenching at 840℃, the strength and hardness reach the maximum value; quenching at 870℃, the elongation reaches the maximum value (15.5%) ； If the quenching temperature is further increased, the strength, hardness and plasticity will decrease. ； The optimal quenching temperature after carburizing 20CrMnTi steel should be between 840 and 870°C. 20CrMnTi (after carburizing) 850～870 Oil brittle 55 HRC Water brittle and easy to crack! ~