Method for controlling side turning of hot rolling stainless steel band

A control method and technology for stainless steel strips, applied in the direction of metal rolling stands, metal rolling mill stands, etc., can solve the problems of loss, large metal, affecting the yield of cold plates, etc.

Active Publication Date: 2013-08-21

SHANXI TAIGANG STAINLESS STEEL CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

[0004] Since the side of the stainless steel continuous casting slab is not ground, there are vibration marks and wrinkles on the surface. After being heated and oxidized at a high temperature in the heating furnace, the surface is rough. After multi-pass rolling with vertical rolls and flat rolls, the slab is rolled from a thickness of 200mm to 3~5mm. Thick hot-rolled coils, after thinning, the side metal is turned over to the surface of the strip, forming rough strips along the sides of the strip, which cannot be eliminated after cold rolling. In order to ens...

Method used

[0013] 1. optimize continuous casting slab and hot-rolled coil ...

Abstract

A method for controlling side turning of a hot rolling stainless steel band belongs to the metallurgy field. The method is characterized in that regarding a rough rolling vertical roll, the side pressure of a first pass is smaller than and equal to 200KN, the side pressure of a third pass is from 300KN to 800KN, and the side pressure of a fifth pass is from 100KN to 300KN. Regarding a rough rolling flat roll, the reduction rate of a first pass is 54.1%, the reduction rate of a second pass is 44.5%, the reduction rate of a third pass is 33.8%, the reduction rate of a fourth pass is 23%, and the reduction rate of a fifth pass is 14.1%. By means of reasonable control of flow deformation of metal in the process of stainless steel hot rolling, the method for controlling side turning of the hot rolling stainless steel band controls rough rolling and broadsiding in an appropriate range, effectively controls the side turning width of the stainless steel band, reduces trimming amount of cold rolling finished products, and improves yield of the cold rolling finished products.

Application Domain

Metal rolling stand details

Technology Topic

Reduction rateMetal +1

Image

Examples

Experimental program(1)

Example Embodiment

[0012] Through the collection of various rolling data during the stainless steel hot rolling process, combined with the measured value of the strip surface rollover width, after comparative analysis and research, on the basis of ensuring the width and rolling stability, the TISCO hot continuous rolling line 1549 strip steel was developed Side roll control method. The main technical solutions are as follows:

[0013] 1. Optimize the width matching of the continuous casting billet and the finished hot-rolled coil to realize the small stretch rolling.

[0014] In order to ensure the width of the finished hot-rolled coil, and at the same time, it is required that the side pressure of the rough rolling vertical roll cannot be too large. It is necessary to reasonably match the continuous casting billet and the hot-rolled coil. According to the small expansion control strategy, the continuous casting billet width is determined after many tests. The target value is 5mm narrower than the width of the finished hot coil.

[0015] 2. Determine the pressure control value of each pass of the roughing vertical roll

[0016] Roughing pass Time after time Three passes Five times Vertical roll side pressure control range ≤200KN 300~800KN 100~300KN

[0017] 3. Optimize the pressure control model of the vertical roll of the rough rolling to realize the automatic control of the side pressure of each pass of the vertical roll according to the required value. The operator monitors and can manually revise the margin according to the side pressure.

[0018] 4. The reduction rate of each pass of the rough rolling flat roll is reasonably determined:

[0019]

PUM

Description & Claims & Application Information

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