Grain-oriented pure iron manufactured through adopting single cold rolling method and method

Abstract

The invention relates to grain-oriented pure iron manufactured through adopting a single cold rolling method and a method. The method comprises the steps of converter smelting, liquid steel refining through a vacuum cycle degassing process, continuous casting, slab heating, hot rolling, normalizing, cold rolling and annealing, wherein after the continuous casting step, an obtained continuous cast slab comprises the following components by mass percent: 0.01 to 0.08% of C, 0.01 to 1.0% of Si, 0.05 to 0.5% of Mn, 0.01 to 0.1% of P, 0.003 to 0.01% of S, 0.005 to 0.05% of Als, 0.005 to 0.02% of N and 0.05 to 0.8% of Cu, and the balance being Fe; in the hot rolling process, the content of gamma phases obtained during finish rolling is controlled to be 10 to 30% by mass percent; in the normalizing step, the temperature of 650 to 800 DEG C is maintained for 30 to 600 s; and the annealing step comprises decarburizing annealing and high temperature annealing. According to the method, the grain-oriented pure iron which has high saturation magnetic induction intension and sharp {110}<001> preferred orientation can be obtained through utilizing conventional production devices of conventional iron and steel enterprises, through utilizing means such as component design, reasonable cooperation of inhibitor composition and appropriate setting of rolling and thermal treatment technologies, and through utilizing a traditional thick slab production technology.

Description

technical field [0001] The invention belongs to the technical field of production of electric soft magnetic materials, and in particular relates to a grain-oriented pure iron manufactured by a one-time cold rolling method and a method thereof. Background technique [0002] Electrical pure iron is the most widely used iron-based soft magnetic material. The purity of Fe is above 99.5%. It has good soft magnetism, the saturation magnetic induction is as high as 2.16T, and the coercivity c Low, high magnetic permeability μ and magnetic induction B, good processability and weldability, simple manufacturing process, and low cost. However, due to its low resistivity, generally 10-12Ω·m, the eddy current loss of the finished product is high and the total iron core loss is high. Therefore, it is mainly used in electromagnets and magnetic shielding materials, and is only suitable for the manufacture of electrical components used under DC. Including high-energy accelerator electromagn...

AI Technical Summary

Problems solved by technology

Although the major grain-oriented silicon steel manufacturers ensure the sharp {110} preferred orientation through fine manufacturing processes, the limitation of the saturation magnetic induction of ferrosilicon alloys leads to the unsatisfactory magnetic induction of commercial grain-oriented silicon steel in the market. Among them, B of High Magnetic Sensitivity Oriented Silicon Steel HiB 800 Generally lower than 1.92T, the B of ordinary magnetic induction oriented silicon steel CGO 800 Generally lower than 1.90T

At the same time, the heating temperature of the slab in the traditional oriented silicon steel production process is too high, the heating temperature is 1350-1400 ℃, the heating temperature of the medium-temperature oriented silicon steel slab developed subsequently is 1250-1350 ℃ and the low-temperature oriented silicon steel slab has gradually matured in recent years The heating temperature is about 1250°C, but they are also higher than the soaking temperature of most types of steel. High temperature heating has brought huge pressure on the yield, magnetism, energy consumption and equipment maintenance of oriented silicon steel.