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Rolling method for strip steel

A technology of strip steel and finish rolling, applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of reducing the yield of finished strip steel products, increasing the weight of cutting heads and tails, and increasing production costs, etc., to achieve reduction Yield, reduce the weight of cutting head and tail, and increase the effect of production cost

Inactive Publication Date: 2017-08-25
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When using the existing rolling method to roll the hot-rolled thin strip, because the thickness of the intermediate billet is thicker, the weight of the head and tail is increased, the yield of the finished strip is greatly reduced, and the production cost is increased. Cause huge economic losses to the company

Method used

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  • Rolling method for strip steel
  • Rolling method for strip steel
  • Rolling method for strip steel

Examples

Experimental program
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Effect test

example 1

[0039] Example 1: the rolling method of the strip steel comprises the steps:

[0040] Step S1: The specification of the strip steel is 2.85*1250mm, the thickness of the slab is determined according to the specification of the strip steel, and the thickness of the SPHC intermediate slab with a weight of 25t is determined according to the thickness of the slab and the rolling tolerance limit of the finishing and roughing mill The value is 32mm;

[0041] Step S2: The thickness of the intermediate billet is 32 mm. In the secondary control, the thickness of the intermediate billet is changed from 38 mm (the thickness of the original intermediate billet) to 32 mm.

[0042] Step S3: Perform rough rolling, flying shearing and finish rolling on the slab according to the thickness value of the intermediate slab to obtain the strip steel, and increase the steel throwing speed in the finish rolling process, and The steel throwing speed is increased by 0-1m / s, and the temperature drop at ...

example 2

[0049] Example 2: the rolling method of described steel strip comprises the steps:

[0050] Step S1: The specification of the strip steel is 3.5*1800mm, the thickness of the slab is determined according to the specification of the strip steel, and the thickness value of the H220YD intermediate slab is determined to be 31mm according to the thickness of the slab and the rolling tolerance limit of the roughing mill ;

[0051]Step S2: The thickness of the intermediate billet is 31mm. The required thickness of the intermediate billet is within the range of 29mm-60mm. In the secondary control, the thickness of the intermediate billet is changed from 34mm (the thickness of the original intermediate billet) to 31mm.

[0052] Step S3: Perform rough rolling, flying shearing and finish rolling on the slab according to the thickness value of the intermediate slab to obtain the strip steel, and increase the steel throwing speed in the finish rolling process, and The steel throwing speed ...

example 3

[0054] Example 3: the rolling method of the strip steel comprises the steps:

[0055] Step S1: The specification of the strip steel is 2.0*1250mm, the thickness of the slab is determined according to the specification of the strip steel, and the thickness value of the 380CL intermediate slab with a weight of 22t is determined according to the thickness of the slab and the rolling tolerance limit of the roughing mill 33mm;

[0056] Step S2: The thickness of the intermediate billet is 33mm. The required thickness of the intermediate billet is within the range of 29mm-60mm. In the secondary control, the thickness of the intermediate billet is changed from 35mm (the thickness of the original intermediate billet) to 35mm.

[0057] Step S3: Perform rough rolling, flying shearing and finish rolling on the slab according to the thickness value of the intermediate slab to obtain the strip steel, and increase the steel throwing speed in the finish rolling process, and The steel throwin...

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Abstract

The invention discloses a rolling method for strip steel. The rolling method comprises the following steps of: determining a thickness value of intermediate billet according to thickness of slab and rolling bearing limit of a rough milling unit, wherein the thickness of the slab is determined according to the thickness of to-be-rolled strip steel; judging whether the thickness value of the intermediate billet is within a required thickness value of the intermediate billet or not; and if the thickness value of the intermediate billet is within the required thickness value of the intermediate billet, performing rough rolling, fly-shearing and finish rolling on the slab to obtain the strip steel. According to the rolling method disclosed by the invention, the thickness value of the intermediate billet is determined according to the thickness of the slab and the rolling bearing limit of the rough milling unit, so that the thickness of the intermediate billet is reduced as much as possible, weight of cropping of front and back ends of the intermediate billet is reduced, the yield is increased, production cost is reduced, and the technical problems that the thickness of the intermediate billet rolled by the rolling method in the prior art is relatively great, weight of cropping of front and back ends is increased, the yield of strip steel finished products is greatly reduced, and production cost is increased are improved.

Description

technical field [0001] The invention relates to the technical field of the metallurgical industry, in particular to a method for rolling steel strips. Background technique [0002] In the metallurgical industry, the hot-rolled sheet process generally includes heating furnace, rough rolling, flying shear, finish rolling, coiling, etc. Among them, the finish rolling unit in the finish rolling process is the most critical equipment, which affects various components of the finished product. control indicators. [0003] After the slab is heated, the rough rolling unit in the rough rolling process will roll the slab into an intermediate billet. The cut intermediate billet is rolled into the finished strip thickness required by the user. [0004] When using the existing rolling method to roll the hot-rolled thin strip, because the thickness of the intermediate billet is thicker, the weight of the head and tail is increased, the yield of the finished strip is greatly reduced, and ...

Claims

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Application Information

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IPC IPC(8): B21B37/16B21B1/22
CPCB21B1/22B21B37/16B21B2261/04
Inventor 荣彦明王建功陈永平崔秋艳谭志福王健胡亮张明生
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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