Method for preparing rotating cubic dual-oriented silicon steel based on thin-strip casting

Abstract

The invention belongs to the metallurgical field, and particularly relates to a method for preparing rotating cubic dual-oriented silicon steel based on thin-strip casting. The method comprises the following steps that (1), steel is molten according to set ingredients, wherein the molten steel comprises, by weight, 0.01-0.05% of C, 1.6-3.3% of Si, 0.003% or less of Mn, 0.03-0.05% of V, 0.005% or less of Al, 0.008% or less of P, 0.002-0.005% of S, 0.002% or less of N, 0.002% or less of O, 0.002% or less of Nb, 0.002% or less of Ti, and the balance Fe and inevitable impurities; (2), a cast strip is formed after the thin-strip casting process; (3), one-pass hot rolling is carried out under the inert atmosphere condition; (4), the hot rolled strip is subjected to acid pickling, coated with an Al2O3 isolating agent and coiled again; (5), long-time heat treatment is carried out on a hot roll after the hot roll enters a bell type furnace, the cooling speed is controlled after operation is finished, and coiling and heat preservation are carried out; (6), cold rolling is carried out after oxidized scale is removed; (7), the cold rolled coil is subjected to recrystallization annealing two times; and (8), the product is coated with an isolating agent and then subjected to annealing, and therefore the rotating cubic dual-oriented silicon steel finished product is obtained. By means of the system of cast rolling, cast strip heat treatment, cold rolling and two-time annealing, dual-oriented silicon steel with {100}<011>-oriented crystal grains growing up abnormally is obtained.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for preparing rotating cubic double-oriented silicon steel based on thin strip continuous casting. Background technique [0002] Non-oriented silicon steel is an important soft magnetic material. For non-oriented silicon steel, the {100} direction of the silicon steel plate is the easy magnetization direction, and its ideal crystal structure is {001} <uvw>, because it is isotropic and the hard magnetization direction <111> is not on the rolling surface. The common dual orientation is cubic or rotating cubic dual orientation. There are two mutually perpendicular easy magnetization <100> on the {100} plane, which can meet the specific requirements of the rotating iron core serving in the magnetic circuit and forming a mutually perpendicular closed circuit. In view of the special and excellent properties of double-oriented silicon steel, t...

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Problems solved by technology

Studies have shown that the use of thin strip continuous casting technology has obvious advantages in the preparation of high-quality silicon steel. Chinese patent (publication number CN 102041367B) discloses a preparation method for thin strip continuous casting to prepare non-oriented silicon steel. The proportion of equiaxed grains in the cast strip is medium, and the magnetic induction value of the final product is 1.70-1.79T, but there are no more reports on the preparation of double-oriented silicon steel

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