Control method for plate shape of high-strength steel plate

A high-strength steel plate and shape control technology, which is applied in the field of steel rolling, can solve problems such as less core extension, excessive unevenness, and large surface extension of the steel plate.

Inactive Publication Date: 2009-02-18
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current production process, the problem of plate shape buckling of high-strength steel plates has always existed, especially in the production of process steel with a yield point greater than 450MPa and low-carbon bainitic steel with a final rolling temperature below 800°C, which cannot fully meet its requirements. Production process requirements
Due to the low final rolling temperature of this type of steel in the la

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: A method for controlling the shape of a high-strength steel plate, comprising the following steps: (1) heating, first heating the billet and then soaking, controlling the temperature of the heating section to be 1200°C, the soaking section to 1160°C, and the total heating time to be 6 hours (2) rolling, step (1) carries out preliminary rolling through the heated steel billet, and the control preliminary rolling pressure is 3700 tons, and preliminary rolling temperature is 1050 ℃, then keeps the steel plate straight and the steel plate swims back and forth on the roller table to be warmed , when the temperature of the steel plate reaches 820°C, the finish rolling is carried out, the finish rolling pressure is 3000 tons, the single pass reduction in the initial rolling and finish rolling process is 10mm, the rolling speed is 1.0m / s, and the pass reduction rate is 16% (3) cooling after rolling, cooling the steel plate after rolling through step (2), controllin...

Embodiment 2

[0012] Embodiment 2: A method for controlling the shape of a high-strength steel plate, comprising the following steps: (1) heating, first heating the billet and then soaking, controlling the temperature in the heating section to be 1210°C, the soaking section to 1170°C, and the total heating time is 5 hours (2) rolling, step (1) carries out initial rolling through the heated steel billet, and the control initial rolling pressure is 3800 tons, and initial rolling temperature is 1080 ℃, then keeps the steel plate straight and the steel plate swims back and forth on the roller table to be warmed , when the temperature of the steel plate reaches 830°C, the finish rolling is carried out, the finish rolling pressure is 3200 tons, the single pass reduction in the initial rolling and finish rolling process is 15mm, the rolling speed is 0.9m / s, and the pass reduction rate is 25% (3) cooling after rolling, cooling the steel plate after rolling through step (2), controlling the cooling f...

Embodiment 3

[0013] Embodiment 3: The plate shape control method of high-strength steel plate, comprising the following steps: (1) heating, the billet is first heated and then soaked, the temperature of the heating section is controlled to be 1220 ° C, the soaking section is 1180 ° C, and the total heating time is 4 hours (2) rolling, step (1) carries out preliminary rolling through the heated steel billet, and the control preliminary rolling pressure is 3900 tons, and preliminary rolling temperature is 1100 ℃, then keeps the steel plate straight and the steel plate swims back and forth on the roller table to be warmed , when the temperature of the steel plate reaches 840°C, the finish rolling is carried out, the finish rolling pressure is 3350 tons, the single pass reduction in the initial rolling and finish rolling process is 20mm, the rolling speed is 0.95m / s, and the pass reduction rate is 34% (3) cooling after rolling, cooling the steel plate after rolling through step (2), controlling...

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PUM

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Abstract

The invention provides a method for controlling the shape of a high-strength steel plate. The method comprises the main steps of heating, rolling, cooling after rolling and straightening; and the heating temperature, the rolling pressure, the rolling temperature, the single-pass reduction amount, the rolling speed, the cooling temperature and the like are controlled. The method has simple operation, simplifies production procedure, shortens production cycle, reduces the transportation and transferring of the steel plate in the middle procedure, saves energy consumption, reduces the increase of unscheduled quantity and can achieve good plate shape; and practices prove that the performance of the steel plate is unchanged, meets various standards and has obvious economical benefit.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and relates to a method for controlling the shape of a high-strength steel plate. Background technique [0002] In the current production process, the problem of plate shape buckling of high-strength steel plates has always existed, especially in the production of process steel with a yield point greater than 450MPa and low-carbon bainitic steel with a final rolling temperature below 800°C, which cannot fully meet its requirements. Production process requirements. Due to the low final rolling temperature of this type of steel in the later stage of rolling and the limited capacity of the rolling mill, the extension of the steel plate on the rolling surface is large, the extension of the center is small, the internal stress of the steel plate is large, and small wave bends are generated. The effect of straightening is not obvious, so that If the unevenness exceeds the standard, it will cause...

Claims

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Application Information

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IPC IPC(8): B21B37/00B21B37/58B21B37/74B21B37/46B21B37/56B21D1/00
Inventor 赵全卿宋向前宁康康温利民李红涛李学奇王会岭罗君高李欢欢唐国军陈俊奇
Owner WUYANG IRON & STEEL
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