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Silicon steel plate with acid pickling being easy and production method thereof

A technology of easy pickling and silicon steel plate, which is applied in the field of metallurgy, can solve the problems of insufficient pickling and large thickness of iron oxide scale, and achieve the effect of increasing output speed, speeding up production rhythm, shortening heating and holding time

Active Publication Date: 2020-10-02
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem that the thickness of silicon steel surface oxide scale is relatively large in the prior art, and it is easy to occur under pickling, and proposes to provide a kind of easy pickling silicon steel plate and its production method, through suitable Si, Mn, Al, etc. Element composition design, combined with reasonable steelmaking, hot rolling, and cold rolling processes, produces silicon steel sheets with thinner oxide scales and easy pickling

Method used

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  • Silicon steel plate with acid pickling being easy and production method thereof
  • Silicon steel plate with acid pickling being easy and production method thereof
  • Silicon steel plate with acid pickling being easy and production method thereof

Examples

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Embodiment 1

[0048] An easy pickling silicon steel sheet in this embodiment comprises the following components in weight percent: C: 0.005%, Si: 2.0%, Mn: 0.35%, Als: 0.5%, S: 0.005%, P: 0.04%, N: 0.005%, Ti: 0.005%, the rest is Fe and unavoidable impurities, wherein the content of Mn and S satisfies Mn / S≥65. Since the silicon content of the easily pickled silicon steel sheet in this embodiment is relatively high, adding suitable elements such as Si, Mn, and Al, and designing the contents of Mn and S to meet Mn / S≥65 is beneficial for subsequent hot rolling. In the process, hot-rolled strips of silicon steel that are easy to pickle and have a thickness of less than 10 μm are obtained.

[0049] The preparation method of an easy pickling silicon steel plate in this embodiment, the preparation process is as follows: molten steel smelting process → continuous casting process → hot rolling process → laminar cooling → coiling process → cold rolling process → continuous annealing process → finishi...

Embodiment 2

[0055] A kind of easy pickling silicon steel plate of this embodiment is basically the same as Example 1, the difference is that a kind of easy pickling silicon steel plate in this embodiment includes the following components by weight percentage: C: 0.003% , Si: 2.3%, Mn: 0.20%, Als: 0.60%, S: 0.003%, P: 0.03%, N: 0.004%, Ti: 0.003%, and the rest are Fe and unavoidable impurities.

[0056] The preparation method of a kind of easy pickling silicon steel plate of this embodiment, its production steps: smelt the pure molten steel according to above-mentioned chemical composition and cast into the slab that thickness is 60mm through caster continuous casting, wherein the time of refining outside the furnace in the molten steel smelting process Control it at 40min, and control the casting speed at 1.3m / min in the continuous casting process. In this example, the cast slab is directly heated into the furnace, the temperature in the heating furnace is 1140°C, the holding time is 150m...

Embodiment 3

[0058]An easy pickling silicon steel plate of this embodiment is basically the same as that of Example 1, the difference being that the easy pickling silicon steel plate of this embodiment comprises the following components in weight percentage: C: 0.002% , Si: 3.5%, Mn: 0.10%, Als: 0.80%, S: 0.001%, P: 0.01%, N: 0.002%, Ti: 0.004%, and the rest are Fe and unavoidable impurities.

[0059] A method for preparing an easy-to-acid-wash silicon steel plate in this embodiment, its production steps: smelting pure molten steel according to the above chemical composition, continuously casting a slab with a thickness of 90mm through a casting machine, and directly heating it into a furnace, and the heating temperature is 1200°C , the holding time is 160min, the roughing and finishing rolling temperature is controlled at 960°C, the reduction is 85%, high-pressure dephosphorization is performed 3 times, the dephosphorizing water pressure is 25MPa, the finish rolling start temperature is 95...

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Abstract

The invention discloses a silicon steel plate with acid pickling being easy and a production method thereof and belongs to the technical field of metallurgy. The silicon steel plate with acid picklingbeing easy comprises, by weight percentage, not larger than 0.005% of C, 2.0%-3.2% of Si, 0.1%-0.35% of Mn, 0.5%-1.0% of Als, not larger than 0.005% of S, not larger than 0.04% of P, not larger than0.005% of N, not larger than 0.005% of Ti and the balance Fe and inevitable impurities, wherein the contents of Mn and S meet that Mn / S is larger than or equal to 65. The preparation technological process comprises the procedures of molten steel smelting, continuous casting, hot rolling, laminar cooling, coiling, cold rolling, continuous annealing and finishing, wherein in the procedure of moltensteel smelting, the external refining time is controlled to be 37-40 min, and in the process of continuous casting, the withdrawal speed is controlled to be 1.1-1.3 m / min. The silicon steel plate withacid pickling being easy and the production method thereof aim to solve the problem that in the prior art, the thickness of scale on the surface of silicon steel is large; and by means of appropriateingredient design of Si, Mn, Al and other elements, in combination with reasonable cooperation of the steel making technology, the hot rolling technology and the cold rolling technology, the siliconsteel plate with scale being thin and acid picking being easy is produced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and more specifically relates to an easy-pickling silicon steel plate and a production method thereof. Background technique [0002] Silicon steel is an important electromagnetic material for motor products. In recent years, with the development of motors for home appliances and new energy products, the requirements for motor performance are getting higher and higher. The mature application of motors in the field of new energy vehicles has effectively reduced the problems caused by air pollution and eased traffic pressure. At the same time, with the further improvement of human life quality, household appliances must be more energy-saving, environmentally friendly, healthy and comfortable. Therefore, the motor must be more efficient. The requirements for silicon steel products are mainly reflected in lower iron loss, higher magnetic induction intensity, reasonable coating effect and excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/12
CPCC22C38/02C22C38/04C22C38/06C22C38/004C21D8/1222
Inventor 李强裴英豪施立发祁旋夏雪兰胡柯
Owner MAANSHAN IRON & STEEL CO LTD
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