Method for eliminating edge warping of silicon steel and silicon steel

A technology of edge and silicon steel, which is applied to the silicon steel produced by this method, eliminates the edge warping of silicon steel, and can solve the problems of silicon steel edge warping, reduce side pressure and width, and eliminate edge warping problems, the effect of improving surface quality

Active Publication Date: 2021-07-02
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention is to overcome the defect that silicon steel edges are easily warped in the prior art, thereby providing a method capable of eliminating warping of silicon steel edges and the silicon steel produced by this method

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  • Method for eliminating edge warping of silicon steel and silicon steel

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Embodiment

[0036] Import the method of eliminating silicon steel edge warping of the present invention into the 1450 hot rolling and 1420 cold rolling production lines of a certain factory:

[0037] Batch production of 42 volumes of 50W600, the finished silicon steel specification is 0.5*1230mm, and the relevant process parameters of the hot rolling process are:

[0038] (1) Pretreatment of slabs with problems such as edge slump defects, corner crack defects, trapezoidal defects, edge burrs, etc.;

[0039] (2) The time for the slab to preheat in the heating furnace is 40 minutes;

[0040] (3) Side pressure reduces width by 10mm

[0041] (4) Increase the width of the side pressure portion of the side pressure vertical roller to 300mm;

[0042] (5) The R1 rolling mill does not descale, and the R2 rolling mill descales in the second pass;

[0043] (6) The work rolls of the R2 rolling mill will be replaced twice a week;

[0044] (7) The second side pressure vertical roller E2 is equipped...

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Abstract

The invention relates to a method for eliminating edge warping of silicon steel and the silicon steel. The method comprises the steps that a plate blank is pretreated; the pretreated plate blank is heated, and the preheating section time of the plate blank in a heating furnace is controlled to be not less than 40 minutes; the plate blank is roughly rolled, and the width reduction amount of the side pressure of the plate blank is adjusted to 0.8-1.2% of the width of the finished silicon steel; and a gap is reserved between a flange of a side pressing vertical roller and the edge of the plate blank. According to the method for eliminating the edge warping of the silicon steel and the silicon steel, the edge warping of the silicon steel can be remarkably eliminated, under the condition that the edge warping defect cannot be completely eliminated, the warping position is restrained to occur in the area with the distance being smaller than 8 mm from the edge, process adjustment is simple and easy to operate, existing equipment and system architecture do not need to be adjusted, and the silicon steel surface quality is obviously improved.

Description

technical field [0001] The invention relates to the technical field of plate coiling and rolling, in particular to a method for eliminating edge warping of silicon steel, and also to a silicon steel produced by the method. Background technique [0002] Silicon steel, also known as electrical steel, was once known as "artwork in steel products". It is an extremely low-carbon ferrosilicon alloy with a silicon content of 0.5% to 4.5%. It is mainly used in various motors, generators, compressors, and motors. It is an indispensable raw material product in industries such as electric power and home appliances. The main alloy of silicon steel is silicon element. As the grade increases, the silicon content increases, and the temperature and thermal conductivity of the slab deteriorates, which directly affects the control of smelting and hot rolling parameters. Due to the particularity of the silicon steel material, unique defects and quality problems often occur in production, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/44B21B15/00B21B45/00
CPCB21B37/44B21B15/00B21B45/00
Inventor 钱京学邹星禄刘海华王晓军孟静
Owner ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD
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