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Thin container plate and production method thereof

A production method and container technology, applied in furnaces, heat treatment equipment, temperature control and other directions, can solve the problems of no hot coil box, large temperature difference between the head and tail of the strip, poor rolling stability, etc., and achieve low alloy costs. , The effect of high rolling yield and stable mechanical properties

Active Publication Date: 2012-02-01
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The article published by Xia Xiaoming et al. ("Research on the production of thin-gauge box plate on the 1422 hot rolling production line", "China Metallurgy", 2011, 21 (2): 41~44.) reported that in the traditional hot rolling production line The above-mentioned technology for producing thin-gauge box boards, the production line has hot coil boxes, the temperature difference between the head and the tail of the strip is small, and the rolling stability is relatively good, but its production technology is not suitable for production lines without hot coil boxes, and cannot Solve the problem of large temperature difference between the head and the tail of the strip in the traditional hot continuous rolling mill without a hot coil box, and poor rolling stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The smelted molten steel (the chemical composition weight percentage of molten steel is: C: 0.07%, Si: 0.40%, Mn: 0.45%, P: 0.08%, S: 0.004%, Cu: 0.27%, Cr: 0.45%, Ni : 0.07%, the balance being Fe and unavoidable impurity elements), casting into a slab, and sending the slab into the heating furnace for heating; the air excess coefficient of the first heating section, the second heating section and the soaking section of the heating furnace are respectively controlled as 1.35, 1.15 and 1.03, the residual oxygen content in the soaking section is 0.7, the outlet temperature of the first heating section is 1135°C, the outlet temperature of the second heating section is 1259°C, the furnace temperature is 1290°C, the soaking time is 52min, and the slab is in the furnace for 220min; The rolling exit temperature is 1120°C, the finishing rolling exit temperature is 910°C, and the coiling temperature is 530°C, and finally rolled into container plates with a thickness of 1.6mm. Th...

Embodiment 2

[0024] The smelted molten steel (the chemical composition weight percentage of molten steel is: C: 0.08%, Si: 0.45%, Mn: 0.40%, P: 0.09%, S: 0.003%, Cu: 0.29%, Cr: 0.40%, Ni : 0.03%, the balance being Fe and unavoidable impurity elements), casting into a slab, and sending the slab into a heating furnace for heating; the air excess coefficient of the first heating section, the second heating section and the soaking section of the heating furnace are respectively controlled as 1.20, 1.10 and 1.00, the residual oxygen content in the soaking section is 0.5, the outlet temperature of the first stage of heating is 966°C, the outlet temperature of the second stage of heating is 1257°C, the outlet temperature is 1300°C, the soaking time is 65min, and the slab is in the furnace for 243min; The rolling exit temperature is 1140°C, the finish rolling exit temperature is 930°C, and the coiling temperature is 510°C, and finally rolled into container plates with a thickness of 1.5mm. The yie...

Embodiment 3

[0026] The molten steel that has been smelted (the chemical composition weight percentage of molten steel is: C: 0.10%, Si: 0.50%, Mn: 0.45%, P: 0.11%, S: 0.002%, Cu: 0.31%, Cr: 0.50%, remainder Fe and unavoidable impurity elements), cast into slabs, and send the slabs into the heating furnace for heating; the air excess coefficients of the first heating section, the second heating section and the soaking section of the heating furnace are respectively controlled to 1.10, 1.05 and 0.95 , the residual oxygen content in the soaking section is 0.3, the outlet temperature of the first heating section is 1093°C, the outlet temperature of the second heating section is 1276°C, the exit temperature is 1310°C, the soaking time is 43min, the slab is in the furnace for 286min; the rough rolling exit temperature is 1150°C , the finish rolling exit temperature is 920°C, the coiling temperature is 520°C, and finally rolled into a container plate with a thickness of 1.6mm. The yield strength...

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Abstract

The invention relates to a thin container plate and a production method thereof. The thin container plate comprises the following chemical ingredients in percentage by weight: 0.07-0.11% of C, 0.40-0.55% of Si, 0.30-0.45% of Mn, 0.08-0.12% of P, less than or equal to 0.006% of S, 0.26-0.35% of Cu, 0.35-0.55% of Cr, less than or equal to 0.09% of N and the balance of Fe and inevitable impurities. With the production method for the thin container plate, low-cost thin container plates of which the thickness is at most 1.6mm can be stably produced on a large scale on a traditional hot strip rolling production line which is not provided with a coil box. The production method has the advantages of high rolling yield rate and low alloy cost which is lowered than the traditional container plate alloy cost by ** yuan / ton.

Description

technical field [0001] The invention relates to a container board and a production method thereof, in particular to a thin-gauge container board and a production method thereof. Background technique [0002] As a major product in hot-rolled commodity coils, container plate has an annual demand of about several million tons. Its notable features are thin specifications, high strength and high weather resistance. The thinnest commonly used specification thickness is 1.6mm, accounting for about The ratio is 16%, and the tensile strength is required to be greater than 480MPa. Compared with ordinary carbon steel Q235B, the relative corrosion rate of 72h cycle infiltration corrosion is less than 60%. Because of the thin specification and high strength of the container plate, for the traditional hot rolling line without hot coil boxes, the finishing rolling time is long, the temperature drop at the tail of the strip is large, the deformation and tensile strength of the tail are la...

Claims

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Application Information

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IPC IPC(8): C22C38/42C22C38/20C21D9/70B21B37/74
Inventor 刘锟吴耐郭婷刘晓翠李飞王伦朱国森武军宽江潇王晓东李彬郭佳
Owner SHOUGANG CORPORATION
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