1results about How to "Reduce rolling temperature" patented technology

The application discloses a method for controlling the bainite structure component of steel, which comprises the following steps: S1, controlling the parameters of the hot rolling process of the steel billet, including reducing the opening rolling temperature by 50-100 DEG C, reducing the rolling speed by 3-10%, and water cooling between the rolling mill racks to form a low final rolling temperature; and S2, after the final rolling is completed, forcibly cooling the rolled piece at a cooling speed of 50 DEG C / s-300 DEG C / s, so that the temperature of the rolled piece rapidly enters the two-phase region or even below the Ac1 line, thereby slowing down or inhibiting the dynamic recrystallization process of the deformed austenite, and making the cooling curve "chase" the continuously right-moving pro-eutectoid ferrite line. By adopting the technical scheme of the application, a significant amount of ferrite component can be obtained for the bainite steel under the hot rolling condition, that is, a ferrite+bainite complex phase structure with different proportions is formed, so that the strength and the toughness and plasticity of the steel can be regulated in a large range.