Optimal cross-section outline control method for hot rolling non-oriented silicon steel
A technology of grain-oriented silicon steel and contour control, which is applied in the field of steelmaking and steel rolling, and can solve problems such as poor pass rate and small width margin
Active Publication Date: 2018-08-17
武汉钢铁有限公司
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Problems solved by technology
[0005] Due to the smaller width margin of one trimming, the raw materials of the same material and the same manufacturing process, the hot-rolled steel strip manufactured by one trimming process, compared with the hot rolled steel strip manufactured by two trimming processes Hot-rolled steel strip, difference in thickness with the same plate (horizontal same plate difference refers to the difference between the middle thickness and the edge thickness in the width direction of the strip, the formula Δh=h c -h e , h c Indicates the middle thickness of the strip, h e Indicates strip edge thickness) C15-7um (the difference between the edge thickness at the strip edge 15mm and the thickness of the middle of the strip is 7um) the pass rate becomes worse, therefore, the prior art needs to be improved
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[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0049] For the raw materials of the same material mentioned in the background technology, under the same manufacturing process, the hot-rolled steel strip manufactured by the one-way side trimming process is compared with the hot-rolled steel strip manufactured by the two-side trimming process. The applicant found that the pass rate of steel strips with a thickness difference of C15-7um is poor due to the following reasons: on the one hand, the setting of the s...
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The invention belongs to the technical field of steel making and steel rolling, and particularly relates to an optimal cross-section outline control method for hot rolling non-oriented silicon steel.The optimal cross-section outline control method for the hot rolling non-oriented silicon steel includes the steps that strip steel with the cross-section outline convexity being 15-35 microns is provided at first; after hot rolling is conducted on the strip steel, a side edge one-time trimming technology is adopted for machining, the percent of pass of the thickness difference in length C15-7 microns of a machined hot-rolled finished steel strip reaches 95% or above, and therefore the product meeting the needs of customers can be produced under the condition of reducing the sheared edge widthmargin.
Description
technical field [0001] The invention belongs to the technical field of steel making and rolling, and in particular relates to a method for controlling the optimal section profile of hot-rolled non-oriented silicon steel. Background technique [0002] Hot-rolled non-oriented silicon steel is one of the raw materials for manufacturing precision instruments such as motors and transformers, and it has extremely high requirements on the same plate difference when used. The same plate difference includes the longitudinal thickness difference along the rolling direction and the transverse thickness difference along the plate width direction. This patent mainly discusses the lateral thickness difference that needs to be controlled emphatically in production. [0003] In the processing technology of the silicon steel hot-rolled steel strip, both sides of the silicon steel hot-rolled steel strip are usually trimmed to produce a steel strip that meets the user's quality requirements. ...
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IPC IPC(8): B21B37/16
CPCB21B37/16
Inventor 胡伟东刘义滔蔡延擘陈宏涛邱晨赵敏陈一峰陶偲姜南辜睿
Owner 武汉钢铁有限公司