Hot continuous rolling medium-and-heavy plate production method and device without coiling micro-stress

A technology of production equipment and production method, which is applied to the production method and equipment field of coil-free micro-stress hot continuous rolling medium and heavy plate, can solve the problems of not realizing the multi-function of the first line and low production efficiency, and achieve the improvement of efficiency and reduction of production efficiency. Residual stress, the effect of reducing flatness defects

Inactive Publication Date: 2009-07-29
WUHAN IRON & STEEL (GROUP) CORP
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Problems solved by technology

The production efficiency is not high because the

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  • Hot continuous rolling medium-and-heavy plate production method and device without coiling micro-stress
  • Hot continuous rolling medium-and-heavy plate production method and device without coiling micro-stress
  • Hot continuous rolling medium-and-heavy plate production method and device without coiling micro-stress

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0026] Figure 1~3 The relationship between the tension, pressure and stress distribution of the middle strip has been analyzed in detail in the background art, and will not be repeated here.

[0027] The coil-free micro-stress hot continuous rolling plate production equipment shown in Figure 4 consists of a heating furnace 1, a two-roll rough rolling unit 3, a four-roll rough rolling unit 4, a finishing rolling unit 5, a cooling section 6, and a coiler 7 are connected successively by roller tables to form a conventional hot continuous rolling unit. After the coiler 7, an extended roller table 11 with a length of 90 to 150 meters is assembled to meet the needs of medium and heavy plate production. The cutting mechanism 8 is assembled in the starting area of ​​the extension roller table 11, and the cutting mechanism 8 is a flying shear or a...

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Abstract

The invention discloses a method and a device for producing coiling-free microstress hot continuously rolled medium plates. The method comprises the following steps: performing heating, rough rolling, precision rolling and cooling in turn on plate blanks in a hot rolled strip operating line; passing cooled steel plates after the rolling directly through a coiling machine and cutting the steel plates; transferring the steel plates onto a cooling bed for temperature reduction; powerfully straightening the steel plates; and finally, cutting the steel plates crossly to obtain the required medium plates. In the device, the rear of the coiling machine of the conventional hot strip mill is provided with an additional roller table; the starting area of the additional roller table is equipped with a cutting mechanism; one side of the additional roller table is provided with the cooling bed; a shifting out device is arranged between the additional roller table and the cooling bed; the tail area of the cooling bed is provided with a straightening machine; and the rear of the straightening machine is provided with a scale cross shearing mechanism. The method and the device can realize production of the medium plates with the maximum thickness of 60mm in the hot strip rolling line, also can realize alternate production of steel coils and the steel plates at the same time, effectively improve the utilization rate of the device, and increase the productivity.

Description

technical field [0001] The invention relates to a technology for producing medium and heavy plates by using a hot-rolled strip steel operation line, in particular to a production method and equipment for coil-free micro-stress hot continuous rolling of medium and heavy plates. technical background [0002] The coiling process of hot-rolled strip steel is a rather complex heat-force coupling deformation process. Not only the internal stress field of the steel coil is constantly changing during the strip coiling process, but also the internal stress of the steel coil will be redistributed again during the uncoiling process. , some kind of plate shape defect problem may be generated from this. [0003] The characteristics of coiling stress state can be described by radial component and tangential component, such as figure 1 as shown, figure 1 Among them, N is the radial pressure and F is the tension. Axial stresses as well as shear stresses between rings are neglected. The ...

Claims

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Application Information

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IPC IPC(8): B21B1/26B21B15/00
Inventor 韩斌郭爱民蒋扬虎周桂峰吴杰宋平谭文
Owner WUHAN IRON & STEEL (GROUP) CORP
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