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Method for Eliminating Chromatic Aberration Defects on Surface of Non-oriented Electrical Steel Sheet Coil

A technology of oriented electrical steel sheets and oriented electrical steels, which is applied to workpiece surface treatment equipment, manufacturing tools, metal processing equipment, etc., can solve problems such as not considering the particularity of thin slab continuous casting and rolling processes, and achieve the reduction of surface color difference defects , increase the viscosity and surface tension, and increase the effect of peeling ability

Active Publication Date: 2020-04-03
武汉钢铁有限公司
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Problems solved by technology

[0006] The above-mentioned patented methods can better eliminate the surface defects of the steel plate for the steel plate production process defined by each; Longitudinal chromatic aberration defects appearing on the surface of the steel sheet coil after cold rolling and annealing of the produced hot-rolled non-oriented electrical steel coil

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  • Method for Eliminating Chromatic Aberration Defects on Surface of Non-oriented Electrical Steel Sheet Coil
  • Method for Eliminating Chromatic Aberration Defects on Surface of Non-oriented Electrical Steel Sheet Coil
  • Method for Eliminating Chromatic Aberration Defects on Surface of Non-oriented Electrical Steel Sheet Coil

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Embodiment Construction

[0021] The present invention will be described in further detail below through comparative examples and examples.

[0022] The method for eliminating chromatic aberration defects on the surface of non-oriented electrical steel sheet coils provided by various embodiments of the present invention includes the following steps:

[0023] 1) Thin slab continuous casting is performed on non-oriented electrical steel molten steel with a refined silicon content of 0.5 to 2.5% (the component content is the mass content unless otherwise specified). ~90)*(900~1600)mm, mold taper is 2.5~8.0%, caster casting speed is 3.2~5.5m / min. The electromagnetic brake of the crystallizer is put into use, and the crystallizer adopts sinusoidal vibration mode. The crystallizer vibration frequency is 270-297 times / min, the vibration amplitude is ≤6mm, and the vibration mark depth of the continuous casting slab is ≤2.0mm. The consumption of mold slag is 0.30~0.60kg / t steel, the thickness of the liquid sl...

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Abstract

The invention discloses a method for eliminating surface color difference defects of a non-oriented electrical steel sheet coil. The method comprises the following steps that 1, non-oriented electrical steel molten steel obtained after purification is subjected to sheet billet continuous casting, in the continuous casting process, slag powder is put into a crystallizer, electromagnetic braking isadopted, and vibration is conducted; 2, a continuous casting billet enters a soaking pit to be heated, and then enters a hot continuous rolling mill to be rolled, coiling is conducted to obtain a hotrolled coil, and dephosphorization is conducted through high pressure water before the continuous casting billet enters the soaking pit and the hot continuous rolling mill separately; 3, the hot rolled coil is subjected to acid pickling, oxide scales are removed, a cold continuous rolling mill is adopted for cold rolling to achieve the target thickness, and then annealing is conducted in an annealing furnace. Accordingly, by adjusting the slag powder components, the technology is improved, the surface color difference defects of the non-oriented electrical steel cold-rolled plate coil are eliminated, and higher requirements of a user on the steel plate surface can be met.

Description

technical field [0001] The invention relates to a method for improving the surface quality of a steel sheet coil, in particular to a method for eliminating color difference defects on the surface of a non-oriented electrical steel sheet coil. Background technique [0002] With the increasingly fierce market competition, users not only require the steel coil to have excellent electromagnetic properties for non-oriented electrical steel, but also require the surface of the steel coil to be smooth and free of defects. Thin slab continuous casting and rolling is a high-efficiency, low-energy-consumption steel production process. The non-oriented electrical steel produced by this process has the advantages of excellent magnetic properties and good shape, so it is widely used. However, due to the short heating time of the billet in the soaking furnace and the absence of large vertical rollers for rough rolling and dephosphorization, some defects on the continuous casting billet ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111B21B45/08C21D8/12
CPCB21B45/08B22D11/111C21D8/1222C21D8/1261
Inventor 李大明王春锋叶飞邱晨刘义滔卫扬帆柳志敏杨皓王占武王海峰
Owner 武汉钢铁有限公司
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