What is the purpose of Q345B steel plate heat treatment method?

The purpose of the high temperature heat treatment and quenching heat treatment process of Q345B steel plate is to improve the impact fatigue resistance of Q345B steel plate, improve hardness and ductility, and remove or greatly reduce thermal stress.

During the heat treatment process, different heat treatment and refrigeration methods should be adopted according to the slowly wall thickness, installed furnace capacity, working condition standards, thermal insulation professional skill level or the change of the average temperature of the four seasons.

For the thicker Q345B steel plate, it should be ensured that the Q345B steel plate does not crack during the whole heat treatment process, and the processing technology should make the impact toughness and strength good match each other.

Slowly increase the temperature in the ultra-low temperature area, and there must be a certain heat insulation time during high temperature martensitization to ensure that the strength of the Q345B steel plate is within the range of the original setting.