Heat treatment: hot rolling, controlled rolling, normalizing, normalizing and tempering, tempering and quenching (quenching and tempering)
Quenching: rapid cooling after heating to the temperature above the phase transformation point. Improve the hardness of the material, but reduce the toughness.
Normalization: After heating to above the phase change temperature, normal cooling (in air).
Annealing: After heating to the temperature above the transformation point, slowly cool. Eliminate the effect of quenching, eliminate the stress, and make the composition uniform.
Tempering: after quenching, heat it to a certain temperature (lower than the quenching temperature), keep it warm, and then cool it. The composition is uniform, the hardness is slightly reduced, and the toughness is greatly improved.
Generally speaking: annealing first, normalizing; Eliminate the influence of original heat treatment. Then quenching and tempering.
The above is some information collected by Xiaobian. I hope it can help you.
