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A control method for edge warping of hot-rolled steel plate

A hot-rolled steel plate and control method technology, applied in the direction of contour control, can solve the problems of increasing furnace time and energy consumption, affecting normal production output, slowing down production rhythm, etc., to improve product quality and yield, optimize two The effect of reducing the width distribution of vertical rollers and reducing the burning loss of slabs

Active Publication Date: 2019-06-04
内蒙古包钢稀土钢板材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many deficiencies in the existing methods for controlling edge warping defects in the production of hot-rolled steel plates (SPHC): one is high cost, which increases the time in the furnace and energy consumption; the other is slowing down the production rhythm and affecting the normal output of production ; Need high-precision equipment to control warping phenomenon

Method used

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  • A control method for edge warping of hot-rolled steel plate
  • A control method for edge warping of hot-rolled steel plate
  • A control method for edge warping of hot-rolled steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method for controlling the edge warping of the hot-rolled steel plate comprises the following steps;

[0031] Step 1. Adjust and control the heating temperature of the hot-rolled steel plate slab to be 1190° C., and the heating time to be 200 minutes;

[0032] Step 2. Adjust the width reduction of the slab sizing machine to 30mm;

[0033] Step 3. Adjust the width reduction of the secondary vertical rollers as follows: the width reduction of the first pass of E1 is adjusted to 35.2mm, the width reduction of the second pass of E1 is adjusted to 32.7mm, and the width reduction of the first pass of E2 is adjusted to 28.3 mm, the width reduction in the second pass of E2 is adjusted to 6.6mm;

[0034] Step 4, adopting the adjusted temperature, time and width reduction amount to roll the hot-rolled steel plate slab.

Embodiment 2

[0036] The method for controlling the edge warping of the hot-rolled steel plate comprises the following steps;

[0037] Step 1. Adjust and control the heating temperature of the hot-rolled steel plate slab to be 1190° C., and the heating time to be 200 minutes;

[0038] Step 2. Adjust the width reduction of the slab sizing machine to 10mm;

[0039] Step 3. Adjust the width reduction of the secondary vertical rollers as follows: the width reduction of the first pass of E1 is adjusted to 35.2mm, the width reduction of the second pass of E1 is adjusted to 32.7mm, and the width reduction of the first pass of E2 is adjusted to 28.3 mm, the width reduction in the second pass of E2 is adjusted to 6.6mm;

[0040] Step 4, adopting the adjusted temperature, time and width reduction amount to roll the hot-rolled steel plate slab.

Embodiment 3

[0042] The method for controlling the edge warping of the hot-rolled steel plate comprises the following steps;

[0043] Step 1. Adjust and control the heating temperature of the hot-rolled steel plate slab to 1200° C., and the heating time to 200 minutes;

[0044] Step 2. Adjust the width reduction of the slab sizing machine to 100mm;

[0045] Step 3. Adjust the width reduction of the secondary vertical rollers as follows: the width reduction of the first pass of E1 is adjusted to 30mm, the width reduction of the second pass of E1 is adjusted to 30mm, the width reduction of the first pass of E2 is adjusted to 25mm, and the width reduction of the first pass of E2 is adjusted to 25mm. The width reduction of the second pass is adjusted to 1mm;

[0046] Step 4, adopting the adjusted temperature, time and width reduction amount to roll the hot-rolled steel plate slab.

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Abstract

The invention discloses a control method for edge skin upwarp of hot-rolled steel plates. The control method comprises the following steps: the heating temperature of plate blanks of the hot-rolled steel plates is controlled to be not higher than 1200 DEG C, and the heating time is not higher than 200 minutes; the width reducing quantity of a plate blank width determiner is adjusted; the width reducing quantity of a second-grade vertical roller is adjusted; and the plate blanks of the hot-rolled steel plates are rolled by adopting the adjusted temperature and width. The control method for edgeskin upwarp of the hot-rolled steel plates effectively reduces the heating energy consumption through reducing the heating temperature of the plate blanks and shortening the furnace time, meanwhile,can reduce the burning loss of the plate blanks, improves the yield, can reduce the production cost, optimizes the width reducing quantity of the plate blank width determiner and the width reducing quantity distribution of the second-grade vertical roller, is free of influencing normal production rhythm, and meanwhile, is free of additional requirements on the equipment precision and excellent inpopularization value.

Description

technical field [0001] The invention relates to the technical field of metallurgical materials, in particular to a method for controlling edge warping of a hot-rolled steel plate. Background technique [0002] Generally, hot-rolled steel plate (SPHC) is used as the main variety of cold-rolled base material, and its product quality has a great influence on the yield and qualification rate, especially the edge warping defect is the most common, so reduce the SPHC edge warping defect It has a huge effect on improving product quality and reducing production costs. In recent years, major steel mills have attached great importance to the control of SPHC edge warping defects, and have also studied many methods for control. [0003] At present, the methods for improving the edge warping defects of the general hot-rolled steel plate (SPHC) in the production process include optimizing the chemical composition of the coating agent, reducing the fluctuation of the liquid level of the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28B21B37/44
CPCB21B37/28B21B37/44
Inventor 周学刚张骞郑永春杨永鹏韩明亮吴明明
Owner 内蒙古包钢稀土钢板材有限责任公司
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