The reasonable composition, rolling process and heat treatment process design of low carbon equivalent Q345R steel for head plate were carried out. Different cooling processes after normalizing heat treatment were simulated and the microstructure and properties were compared and analyzed. The reasonable performance recovery heat treatment process was determined. The results show that, after normalizing for the properties recovery of Q345R steel, water mist spray cooling treatment is used to obtain a good match of strength and toughness.
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low carbon equivalent