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Manufacturing method of thin strip continuously cast and cold rolled non-oriented electrical steel

A technology of oriented electrical steel and manufacturing methods, which is applied in the direction of manufacturing tools, heat treatment process control, heat treatment equipment, etc., and can solve problems such as the difficulty in producing thin-gauge cold-rolled products

Active Publication Date: 2012-09-19
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this invention is that it is difficult to produce thin gauge cold rolled products

Method used

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  • Manufacturing method of thin strip continuously cast and cold rolled non-oriented electrical steel
  • Manufacturing method of thin strip continuously cast and cold rolled non-oriented electrical steel
  • Manufacturing method of thin strip continuously cast and cold rolled non-oriented electrical steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The molten steel is smelted in an electric furnace or a converter, and after the refining process, the molten steel that meets the A component requirements in Table 1 and the remainder is Fe is cast into a cast strip. Since the carbon content of this composition is less than 0.003%, it does not need to be decarburized. The technological process selection that embodiment A1 produces figure 2No hot rolling, no decarburization process in the flow process; the production process selection of embodiment A2 figure 2 There are hot rolling and non-decarburization processes in the process. The main process parameters and product performance are shown in A1 and A2 in Table 2.

Embodiment 2

[0069] The molten steel is smelted in an electric furnace or a converter. After the refining process, the molten steel that meets the B component requirements in Table 1 and the remainder is Fe is cast into a cast strip. Since the carbon content of this composition is less than 0.003%, it does not need to be decarburized. Process selection for B1 production figure 2 There is no hot rolling and no decarburization process in the process; B2 selection figure 2 There are hot rolling and no decarburization process, the main process parameters and product performance are shown in B1 and B2 in Table 2.

Embodiment 3

[0071] The molten steel is smelted in an electric furnace or a converter. After the refining process, the molten steel that meets the C component requirements in Table 1 and the balance is Fe is cast into a cast strip. Since the carbon content of this composition is less than 0.003%, it does not need to be decarburized. Process selection for C1 production figure 2 There is no hot rolling and no decarburization process in the process; C2 selection image 3 There are hot rolling and no decarburization process, the main process parameters and product performance are shown in C1 and C2 in Table 2.

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Abstract

The invention relates to a manufacturing method of thin strip continuously cast and cold rolled non-oriented electrical steel, comprising the following steps: smelting molten steel the temperature and components of which meet the requirements, casting the molten steel into a molten bath formed by a pair of water-cooling crystallizing rolls rotating at high speed, then cooling for the second time,hot rolling, cooling for the third time, coiling, cooling to room temperature, pickling, cold rolling, and finally annealing to obtain the cold rolled non-oriented silicon steel sheet with high magnetic induction and low iron loss. In the invention, the thin strip continuous casting process can eliminate the hot rolling thinning procedure in the traditional process, thus avoiding quality defect caused by the improper hot rolling process, simultaneously reducing the equipment loss, and reducing the maintenance and overhaul costs of equipment; the solidification process is controlled to improvethe medium axialite proportion of the casting strip, thus improving the corrugation defect of the product in the cold rolling process; and the range of components of the non-oriented silicon steel smelting is widened by the characteristic of quick solidification of the continuously cast thin strip, and the smelting cost is lowered. The invention has the advantages of short process flow, low energy consumption, high efficiency, low production cost, simple manufacturing method and obvious energy saving and consumption reducing effects.

Description

technical field [0001] The invention belongs to the field of metal material processing, and relates to a method for manufacturing thin-strip continuous casting cold-rolled non-oriented electrical steel. Background technique [0002] Silicon steel is an important soft magnetic material, accounting for about 90-95% of the total magnetic materials. It is also called electrical steel. It is one of the basic materials for the development of electric power and telecommunications industries. It is used to manufacture motors, transformers and Ballast iron core and various electrical components are indispensable and important soft magnetic alloys in electric power, electronics and military industries. Silicon steel is divided into oriented silicon steel and non-oriented silicon steel; non-oriented silicon steel can be divided into cold-rolled non-oriented silicon steel and hot-rolled non-oriented silicon steel. At present, there are few hot-rolled non-oriented silicon steels, mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/12C22C38/02C22C38/04C22C38/06B22D11/06C21D1/26C21D1/74C21D11/00
Inventor 于艳王波吴建春方园梁高飞王成全
Owner BAOSHAN IRON & STEEL CO LTD
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