Method for preventing steel band from sliding in reversible cold rolling process of 400-series steel plate

A technology for steel strips and steel plates, applied in metal rolling, metal rolling, rolling mill control devices, etc., can solve problems such as slip marks on the surface of steel coils, automatic speed reduction of production equipment, and impact on production efficiency, so as to improve operating efficiency , Improve productivity and output, increase cost effect

Inactive Publication Date: 2016-02-17
ZHANGJIAGANG POHANG STAINLESS STEEL
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

After skidding occurs, skid marks will appear on the surface of the steel coil, and the production equipment will

Method used

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  • Method for preventing steel band from sliding in reversible cold rolling process of 400-series steel plate

Examples

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Effect test

Embodiment 1

[0012] Embodiment 1, a method for preventing steel strip from slipping during reversible cold rolling of 430 steel plate, comprising: selecting rolls with a diameter of 85 mm for rolling, and the surface roughness of the rolls in the first three rolling passes is Ra0.4-0.6 , during rolling, the tension at the front of the steel strip is controlled to 50 tons, except for the first pass, the tension at the rear of the steel strip is 47 tons, the discharge speed of the steel strip is controlled at 550 mpm, and the reduction rate of each pass is ≤ 28%; when the system When the first roll slip coefficient Sa≥3.0% is measured, or the other roll slip coefficient Sb≥1.2%, the rolling system is controlled to reduce the discharge speed of the steel strip until the measured slip coefficient reaches the set range.

Embodiment 2

[0013] Embodiment 2, a method for preventing steel strip from slipping during reversible cold rolling of 439 steel plate, comprising: selecting rolls with a diameter of 80 mm for rolling, and the surface roughness of the rolls in the first three rolling passes is Ra0.4-0.6 , during rolling, the tension at the front of the steel strip is controlled to 55 tons, except for the first pass, the tension at the rear of the steel strip is 53 tons, the discharge speed of the steel strip is controlled at 520 mpm, and the reduction rate of each pass is ≤ 28%; when the system When the first roll slip coefficient Sa≥3.0% is measured, or the other roll slip coefficient Sb≥1.2%, the rolling system is controlled to reduce the discharge speed of the steel strip until the measured slip coefficient reaches the set range.

[0014] The following table lists the comparison of the average value of relevant data rolled by this method and the traditional method for 400 series (taking AV-short linear fr...

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Abstract

The invention discloses a method for preventing a steel band from sliding in the reversible cold rolling process of a 400-series steel plate. The method comprises the steps that firstly, rollers with the diameters ranging from 75 mm to 105 mm are selected for rolling, the surface roughness of the rollers in first three rolling gates ranges from Ra0.4 to Ra0.6, the front tension of the steel band is controlled to be 40-60 ton in the rolling process, the rear tension of the steel band is smaller than the front tension of the steel band by 2-3 ton except the first gate, the discharging speed of the steel band is controlled to be 500-600 mpm, and the reduction rate of each gate is smaller than or equal to 28%.

Description

technical field [0001] The invention relates to a method for preventing steel strips from slipping during reversible cold rolling of 400 series steel plates. Background technique [0002] Because of its excellent processing performance, 400 series steel has become a commonly used material in daily life. It is widely used in the manufacture of elevators, exhaust pipes, kitchen utensils and other products, and its relatively low price compared with 300 series makes it have a good market prospect. [0003] At present, when the 400 series steel plate is cold rolled, the main problem that limits the production speed often occurs slippage. Generally speaking, due to the constant volume, the thickness of the steel strip after rolling is small, so the exit speed is faster than the entrance, and there is a point N on the contact arc between the steel plate and the roll during normal rolling, which is called the neutral point. The speed of the point is the same as the surface speed o...

Claims

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Application Information

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IPC IPC(8): B21B37/48B21B37/00B21B1/36
CPCB21B37/48B21B1/36B21B37/00
Inventor 徐明明
Owner ZHANGJIAGANG POHANG STAINLESS STEEL
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