Atmosphere control process of high-magnetic-induction oriented silicon steel with excellent magnetism

Abstract

The invention relates to the technical field of oriented silicon steel, and discloses an atmosphere control process of high-magnetic-induction oriented silicon steel with excellent magnetism. The atmosphere control process comprises the following steps of 1, smelting, specifically, smelting in a converter and RH refining to obtain molten steel, introducing air in the smelting process, and setting the total air inflow to be 100-300Nl / min and the oxygen content in the introduced air to be 20-21%. According to the atmosphere control process of the high-magnetic-induction oriented silicon steel with the excellent magnetism, the content of oxygen and the content of nitrogen in a certain proportion are added in different processes, the atmosphere control precision of each stage is effectively improved, therefore the obtained final high-magnetic-induction oriented silicon steel is excellent, the influence of air pressure, flow and other factors on the magnetic effect of the final high-magnetic-induction oriented silicon steel is avoided, the FeO content in the slag is reduced, the steel recovery rate is increased, the service life of a furnace lining is prolonged, the effect of reducing the production cost is achieved, accurate atmosphere control is conducted, the smelting effect is better in the smelting process of the high-magnetic-induction oriented silicon steel, and the magnetism of the smelted high-magnetic-induction oriented silicon steel is more excellent.

Description

technical field

[0001] The invention relates to the technical field of oriented silicon steel, in particular to an atmosphere control process of high magnetic induction oriented silicon steel with excellent magnetic properties. Background technique

[0002] Silicon steel has excellent magnetic properties such as low loss and low magnetostriction, and is the most important magnetic material in the electric power and electronics industries. Silicon steel is usually divided into oriented silicon steel and non-oriented silicon steel. Among them, the grain-oriented silicon steel utilizes the secondary recrystallization abnormal growth of the crystal grains to make the finished product have a preferred orientation of Gaussian texture. Due to the orientation characteristics of the finished crystal grains, the axis of the internal lattice is as parallel as possible to the rolling direction. This material has good magnetic permeability in the rolling direction and can obtain high ma...

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