Method for manufacturing directional silicon steel

A production method and technology of oriented silicon steel, which is applied in the field of iron and steel metallurgy, can solve the problems of increased production time and cost, reduced yield, and lengthened process, and achieve the effects of reduced high-temperature annealing time, reduced production time, and improved production efficiency

Active Publication Date: 2010-06-23
ANGANG STEEL CO LTD
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Problems solved by technology

The main reason may be that the production of oriented silicon steel by the three-time cold rolling method will lengthen the process, the process is complicated, the production time and cost will increase, and the yield will decrease. Considering the cost performance, there is no further research on the production of oriented silicon steel by the three-time cold rolling method

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  • Method for manufacturing directional silicon steel

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Embodiment Construction

[0024] The technological process of the present invention is: smelting→slab→heating→hot rolling→primary cold rolling→first intermediate annealing→second cold rolling→second intermediate annealing→third cold rolling→coating MgO→high temperature annealing.

[0025] The specific method is to perform vacuum melting according to the required composition of conventional oriented silicon steel, and cast into a slab. After cooling to room temperature, the surface of the slab is treated, and the treated slab is put into a heating furnace for high-temperature heating, and then heated after being discharged. Rolling and low-temperature coiling are characterized by three cold rolling, two intermediate annealing, one MgO coating production processes for rolling and treatment processes, the first intermediate annealing after one cold rolling; the first intermediate annealing eliminates processing Stress and partial decarburization. After the second cold rolling, the second intermediate annealin...

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Abstract

The invention discloses a method for manufacturing directional silicon steel. The method is characterized in that a rolling and treating process adopts a manufacture process of triple cold rolling, twice intermediate annealing, and once MgO coating, and finally carrying out high temperature annealing. One-pass roll separating force in the triple rolling is reduced, the internal tissue of the steel is uniform, so the time for high temperature annealing is reduced by 20 to 30 percent, and a product with strong (110)[001] structure is finally obtained. The method not only can obviously improve the electromagnetic performance (iron loss reduces but magnetic induction increases), ensures that the iron loss P1.7 is reduced by about 0.08W / kg, ensures the magnetic induction B8 is improved by about 0.07T, not only ensures that the product is improved from half to one grade, but also ensures that the total production time is obviously reduced, the total production time is remarkably shortened, thereby improving the manufacture efficiency of the directional silicon steel.

Description

Technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and relates to a production method of silicon steel, in particular to a production method for improving the performance of oriented silicon steel. Background technique [0002] Oriented silicon steel can be divided into ordinary magnetically induced oriented silicon steel (GO steel) and high magnetically induced oriented silicon steel (Hi-B steel) according to cold rolling process and electromagnetic properties. Usually the secondary intermediate reduction rate cold rolling method is used to produce GO steel (with MnS as inhibitor). Hi-B steel usually adopts one-time high-reduction cold rolling method, which has high and stable magnetic properties (using AlN as inhibitor); it can also be produced by two-time medium-reduction cold rolling method to produce Hi-B steel, but its magnetic properties are low And unstable (using MnSe (or MnS) + Sb as inhibitor). [0003] There is no report ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/12C21D1/26C21D1/68
Inventor 蒋奇武金文旭付勇军游清雷张静庞树芳张海利王晓达
Owner ANGANG STEEL CO LTD
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