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A cooling method for controlling side bending deformation of marine L-shaped steel after rolling

A cooling method and technology on the control side, applied in the direction of metal rolling, metal rolling, temperature control, etc., to achieve the effects of simple operation, improved uniformity, and good achievability

Active Publication Date: 2022-02-22
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above technical problems, the present invention provides a cooling method for controlling side bending deformation of marine L-shaped steel after rolling, which applies forced water cooling with different strengths and adjustable strength to different parts of the L-shaped steel to improve the cooling uniformity of the L-shaped steel, thereby improving Severe side bending deformation of L-shaped steel after cooling to normal temperature on the upper cooling bed

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  • A cooling method for controlling side bending deformation of marine L-shaped steel after rolling

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Experimental program
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Effect test

Embodiment 1

[0021] Cooling method for controlling the deformation of the side bend after marine L-shaped steel, including the steps of:

[0022] Step 1: After the billet L-type steel blank is completed by the billet, the ferrule L-type steel 6 after the final rolling is obtained, and the rapid cooling treatment is subsequently cooled, and different intensities are applied to the three parts of the end-rolled ship L-steel 6. Cool, such as figure 1 As shown, the nozzle of the I No. 1 and II water box 2 is water-cooled on both sides of the panel, and the nozzle of the III water box 3 and IV water tank 4 is water-cooled to water cooling on both sides of the web, using the V-tank 5 The nozzle is water-cooled to the R angular position, the cooling strength of: the cooling strength of the R angle position> The cooling strength of the position of the panel is positioned> The cooling strength of the position of both sides of the web, the overall cooling rate of the marine L-steel is 62 ° C / s, coolin...

Embodiment 2

[0032] Cooling method for controlling the deformation of the side bend after marine L-shaped steel, including the steps of:

[0033] Step 1: After completing the finished rolling, after the billet is finished, it is obtained from the end-rolled marine L-steel, which is subsequently cooled, and different intensity cooling is applied to the three parts of the end-rolled ship L-type steel. The cooling mode is in Example 1, the cooling strength of: the cooling strength of the R angular position> The cooling strength of both sides of the panel> The cooling strength of both sides of the web, the overall cooling rate of the marine L-steel is 50 ° C / s, cooling time For 6S, the cold temperature is 620 ° C, which is obtained from the end of the ship.

[0034] Step 2: After the end of the boat L-shaped steel, the temperature of the return temperature is 711 to 719 ° C, and then the L-type steel enters the cold bed and cold to room temperature.

[0035] The chemical composition of the marin...

Embodiment 3

[0043] Cooling method for controlling the deformation of the side bend after marine L-shaped steel, including the steps of:

[0044]Step 1: After completing the finished rolling, after the billet is finished, it is obtained from the end-rolled marine L-steel, which is subsequently cooled, and different intensity cooling is applied to the three parts of the end-rolled ship L-type steel. The cooling mode is in Example 1, the cooling strength of: the cooling intensity of the C-angle position> The cooling strength of the position of the panel, the cooling strength of both sides of the web, the overall cooling rate of the marine L-steel is 70 ° C / s, cooling time For 3s, the cold temperature is 670 ° C, which is obtained from the end of the ship.

[0045] Step 2: After the end of the endless ship L-type steel, the temperature of the return temperature is 754 to 765 ° C, and then the L-steel enters the cold bed and cools to room temperature.

[0046] The chemical composition of the mar...

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Abstract

A cooling method for controlling side bending deformation of marine L-shaped steel after rolling, which belongs to the field of marine structural steel manufacturing. The cooling method of the present invention applies water cooling with different strengths to various parts of the L-shaped steel at the same time according to the cross-sectional characteristics and heat dissipation laws of the L-shaped steel. The cooling intensity at the R angle position is greater than that at both sides of the panel and at both sides of the web, and the cooling intensity at both sides of the panel is greater than that at both sides of the web, thereby improving the uniformity of the cooling temperature of the L-shaped steel during the cooling process, thereby eliminating or reducing the L-shaped steel Severe side bending caused by uneven cooling can achieve the effect of improving steel quality and yield, and can increase the yield from 83% of the existing cooling technology to more than 95%; the amount of bending is reduced from more than 0.1m to H It is 0.01-0.05m.

Description

Technical field [0001] The present invention belongs to the field of marine structural steel manufacturing, and in particular, a cooling method of control lateral bend deformation after marine L-shaped steel rolling. Background technique [0002] Hot rolled L-type steel is mainly used in the shipbuilding industry, and it is an important hull structure steel. With the rapid development of the shipbuilding industry at home and abroad, the demand for L-type steel increases, and the market prospects are increasing. Compared to foreign countries, there is a problem with the production efficiency and low material preference in the production of domestic marine L-shaped steel, and the material is maintained at around 83%. L-type steel belongs to a flat-class asymmetric cross-section profile, and the storage of all parts is different. The current domestic L-type steel is mainly natural and air cooled, which causes the non-uniform steel of L-type steel to cool the L-steel heat dissipation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/74B21B45/02
CPCB21B37/74B21B45/0203
Inventor 赵宪明李杰
Owner NORTHEASTERN UNIV LIAONING
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