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Low-grade non-oriented silicon steel hot rolling production method capable of controlling edge quality

A technology of oriented silicon steel and production method, applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems such as affecting the production rhythm of cold-rolling and pickling, burr rolling cannot be realized in batches, and cutting losses remain high. The effect of rough edge state, solving edge roughness, and improving burr rolling rate

Active Publication Date: 2021-11-02
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silicon content of low-grade non-oriented silicon steel is about 1.0%, and the side edge of the hot-rolled coil is rough like snakeskin. This kind of edge quality defect seriously affects the production rhythm of cold-rolled and acid-rolled, and will seriously cause strip breakage
[0003] At present, there is no targeted, complete and effective control method for the rough state of the edge of low-grade non-oriented silicon steel, which leads to the need for trimming production in the post-production process of silicon steel, high cutting loss, and rough edge rolling. Batch implementation

Method used

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  • Low-grade non-oriented silicon steel hot rolling production method capable of controlling edge quality
  • Low-grade non-oriented silicon steel hot rolling production method capable of controlling edge quality
  • Low-grade non-oriented silicon steel hot rolling production method capable of controlling edge quality

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] For low-grade non-oriented steels with a silicon content of 0.30-1.10%, add a vertical roll lubrication device to the E2 vertical roll before the roughing mill R2, put in the vertical roll lubrication, and the lubricating oil flow rate is 150ml / min. Upgrade one level, increase the service life from 50,000 to 100,000 tons to 250,000 tons at the same time, rough rolling mode 1+5, adjust rough rolling mode according to the vertical roll period, control the width reduction of each pass of R2 below 20mm, descale water According to the surface quality, the first pass can be opened respectively.

Embodiment 2

[0040] For low-grade non-oriented steels with a silicon content of 0.30-1.10%, add a vertical roll lubrication device to the E2 vertical roll before the roughing mill R2, put in the vertical roll lubrication, and the lubricating oil flow rate is 240ml / min. Upgrade one level, increase the service life from 50,000 to 100,000 tons to 250,000 tons at the same time, rough rolling mode 1+5, adjust rough rolling mode according to the vertical roll period, control the width reduction of each pass of R2 below 20mm, descale water According to the surface quality, the first pass can be opened respectively.

Embodiment 3

[0042] For low-grade non-oriented steels with a silicon content of 0.30-1.10%, add a vertical roll lubrication device to the E2 vertical roll before the roughing mill R2, put in the vertical roll lubrication, and the flow rate of lubricating oil is 200ml / min. Upgrade one grade, increase the service cycle from 50,000 to 100,000 tons to 250,000 tons at the same time, rough rolling mode 1+5, adjust the rough rolling mode according to the roll period of the vertical roll, control the width reduction of each pass of R2 below 20mm, descale water According to the surface quality, the first pass can be opened respectively.

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Abstract

The invention particularly relates to a low-grade non-oriented silicon steel hot rolling production method capable of controlling the edge quality, and belongs to the technical field of non-oriented silicon steel hot rolling production. The method comprises the following steps that primary rough rolling is carried out on a low-grade non-oriented silicon steel slab, secondary rough rolling is carried out on the slab subjected to the primary rough rolling, wherein a vertical roll lubricating device is arranged on a vertical roll in front of a secondary roughing mill, and the oil quantity of lubricating oil supplied to the vertical roll by the vertical roll lubricating device is 100 mL / min-400 mL / min; and fine descaling, fine rolling and coiling are carried out on the slab subjected to secondary rough rolling to obtain a hot-rolled coil with qualified edge quality. By means of the method, the good vertical roll surface state is guaranteed, the rough edge can be effectively solved, the rough edge state of the low-grade non-oriented silicon steel is effectively solved, the rough edge rolling rate of the procedure after cold rolling is greatly increased, and the whole-procedure yield of the silicon steel is increased.

Description

technical field [0001] The invention belongs to the technical field of hot-rolling production of non-oriented silicon steel, in particular to a method for hot-rolling production of low-grade non-oriented silicon steel with controlled edge quality. Background technique [0002] The hot-rolling production technology of low-grade non-oriented silicon steel is mature and stable, and can be supplied stably in batches, but the quality of the curling part of the hot-rolled raw material directly determines whether the post-cold rolling process can achieve rough rolling. The silicon content of low-grade non-oriented silicon steel is about 1.0%, and the side of the hot-rolled coil is rough like snakeskin. Such edge quality defects seriously affect the production rhythm of cold-rolled and acid-rolled, and will seriously cause strip breakage. [0003] At present, there is no targeted, complete and effective control method for the rough state of the edge of low-grade non-oriented silicon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B27/06C22C38/02C22C38/04
CPCB21B1/22B21B27/06C22C38/02C22C38/04C22C38/004B21B2001/225Y02P70/10
Inventor 焦晋沙霍光帆曹瑞芳李树强李二军刘伟伟罗旭烨陶永强
Owner BEIJING SHOUGANG CO LTD