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Longitudinal deformed section steel plate and production method

A special-shaped section, steel plate technology, applied in the direction of sheet/plate, building components, metal rolling, etc., can solve the problems of low production efficiency, poor control stability, etc., to achieve high qualification rate, strong applicability, strong controllability Effect

Inactive Publication Date: 2018-08-14
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts segmental rolling, which will lead to the disadvantages of low production efficiency and poor control stability in actual mass production

Method used

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  • Longitudinal deformed section steel plate and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A 5500mm medium and thick plate rolling mill is used to roll a steel plate with a longitudinal special-shaped section of Q345B, and its longitudinal section shape is as follows figure 1 As shown, the specific dimensions are:

[0047] h 0 = 8mm, H 1 = 40mm, H 2 = 50mm, the total length of the steel plate L = 50000mm, of which the length of the gradual change section - 1 is L 1 =8000mm, length L of gradient section 2 3 2 =8500mm.

[0048] In the present embodiment, the production method of the longitudinal special-shaped section steel plate is as follows:

[0049] 1) Steel billet heating process: the steel billet heating temperature range is controlled at 1120-1150 °C, and the upper surface temperature is 30 °C higher than the lower surface temperature;

[0050] 2) After the billet is out of the furnace, it is descaled by high-pressure water with a pressure ≥ 20MPa;

[0051] 3) Rolling process: the starting rolling temperature is controlled at 1020°C, and the final...

Embodiment 2

[0056] A 5500mm medium and thick plate rolling mill is used to roll a steel plate with a longitudinal special-shaped section of Q345B, and its longitudinal section shape is as follows figure 1 As shown, the specific dimensions are:

[0057] h 0 =120mm,H 1 =150mm,H 2 =150mm, the total length of the steel plate L=12000mm, of which the length of the transition section-1 is L 1 =2500mm, length L of gradient section 2 3 2 =2500mm.

[0058] In the present embodiment, the production method of the longitudinal special-shaped section steel plate is as follows:

[0059] 1) Steel billet heating process: the steel billet heating temperature range is controlled at 1130-1170°C, and the upper surface temperature is 30°C higher than the lower surface temperature;

[0060] 2) After the billet is out of the furnace, it is descaled by high-pressure water with a pressure ≥ 20MPa;

[0061] 3) Rolling process: the starting rolling temperature is controlled at 1030°C, and the final rolling te...

Embodiment 3

[0066] A 5500mm medium and thick plate rolling mill is used to roll a steel plate with a longitudinal special-shaped section of Q345B, and its longitudinal section shape is as follows figure 1 As shown, the specific dimensions are:

[0067] h 0 =52mm,H 1 =72mm,H 2 = 80mm, the total length of the steel plate L = 20000mm, of which the length of the transition section - 1 is L 1 =3000mm, length L of gradient section 2 3 2 = 3500mm.

[0068] In the present embodiment, the production method of the longitudinal special-shaped section steel plate is as follows:

[0069] 1) Steel billet heating process: the steel billet heating temperature range is controlled at 1130-1150 °C, and the upper surface temperature is 30 °C higher than the lower surface temperature;

[0070] 2) After the billet is out of the furnace, it is descaled by high-pressure water with a pressure ≥ 20MPa;

[0071] 3) Rolling process: the starting rolling temperature is controlled at 1040°C, and the final rolli...

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Abstract

The invention relates to a longitudinal deformed section steel plate and a production method thereof. The longitudinal deformed section steel plate comprises a first gradual change segment, an equal-thickness segment and a second gradual change segment, wherein the first gradual change segment, the equal-thickness segment and the second gradual change segment are subject to rolling to be continuously formed, and the total length of the three segments is L. The lower surfaces of the first gradual change segment, the equal-thickness segment and the second gradual change segment are a plane, theupper surfaces of the first gradual change segment, the equal-thickness segment and the second gradual change segment are a continuous smooth transition surface, the upper surface of the equal-thickness segment is a plane, and the upper surfaces of the first gradual change segment and the second gradual change segment are curve faces. The special structural shape is adopted, the length and thickness size selective range is large, the adaptation is high, in the actual engineering application process, the machining amount and the welding workloads of steel beams for structures like an extensionbeam can be reduced, joint strength is increased, and connection reliability is improved; the production process is simple, controllability is high, the finished product pattern yield is high, and thesurface quality and the chemical performance can meet the use needs.

Description

technical field [0001] The invention relates to the technical field of production of longitudinally variable thickness (LP) steel plates, in particular to a steel plate with longitudinal special-shaped cross-section and a production method thereof. Background technique [0002] Longitudinal variable thickness (LP) steel plate refers to a steel plate with a special longitudinal shape whose thickness changes continuously along the rolling direction. The longitudinal thickness of the steel plate is changed by continuously changing the opening of the roll during the rolling process. Since the longitudinal variable thickness steel plate can change its thickness according to the load bearing conditions, it can optimize the design of structural sections such as bridges, hulls, buildings, etc., which can not only reduce the amount of steel used, reduce the number of welding times, but also improve the thickness of the joints through equal thickness Operability, such as omission of b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16S1/12F16S1/06B21B1/22
CPCF16S1/12B21B1/22B21B2205/00B21B2261/043F16S1/06
Inventor 李文斌刘明王华王若刚李新玲陈军平隋轶李云杨军李靖年
Owner ANGANG STEEL CO LTD
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