Surface iron scale control method for middle sheet billet continuous casting and rolling steel plate

Abstract

The invention discloses a controlling method of iron oxide sheet of rolled band steel surface of middle-thin board blank, which is characterized by the following: controlling component; proceeding heat load directly; heating to remove phosphor; rolling under high temperature; forcing to cool; controlling Si content in the steel; eliminating red ferric oxide on the surface of heat roll steel; fitting for the steel with not more than 0.18%C, not more than 0.20% Si, not more than 1.50% Mn, not more than 0.015% P, not more than 0.01% S and Nb, V and Ti.

Description

technical field

[0001] The invention belongs to a steel plate surface treatment technology, in particular to a method for removing surface oxide scales during continuous casting slab heating and rolling. Background technique

[0002] During the process of heating, conveying and rolling, due to the reaction with oxygen, a certain amount of iron oxide scale will inevitably be produced on the surface of the casting slab or steel slab. If it cannot be removed well, it will greatly affect the surface quality of the rolled steel plate. Therefore, all manufacturers have given full attention and in-depth research to eliminating the oxide scale on the surface of the billet, and have taken various measures to solve it.

[0003] So far, although there are many measures to remove the iron scale on the surface of the billet, almost all solutions adopt a single physical method, that is, mechanical descaling, high-pressure water descaling, shot peening or bending deformation to remove the ...