Ocean platform pile leg steel raw material rolling method

A technology for offshore platforms and pile legs, which is applied in the direction of metal rolling to achieve the effects of reduced energy consumption, increased productivity, and easy control of material shape

Active Publication Date: 2015-04-01
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is how to provide a method for rolling steel raw materials for offshore platform pile legs through large-section continuous casting round billets, so as to overcome the defects of the existing production process for extra-thick plate billets. The rolling method has high production efficiency and saves Energy, wide rolling range, good internal quality of slabs

Method used

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  • Ocean platform pile leg steel raw material rolling method
  • Ocean platform pile leg steel raw material rolling method
  • Ocean platform pile leg steel raw material rolling method

Examples

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Effect test

Embodiment 1

[0030] Use qualified continuous casting round billets, with cross-sectional dimensions as attached figure 1 As shown, it is φ650mm. According to the conventional method, the continuous casting round billet is sent to the heating furnace and heated to about 1250°C. After the high-pressure water is discharged from the furnace, the billet that has deviated in the roller table is pushed and rolled by the pusher and the clamping plate. Line and sent to the roughing mill for multi-pass rolling (pass image 3 As shown, a total of 7 passes are rolled, and the section of the billet after rolling is shown in the attached file. Figure 4 As shown, the height is 380mm and the width is 860mm. Then, the produced offshore platform legs are hoisted and collected with steel raw materials to complete the production process.

[0031] The invention is suitable for φ650mm~φ800mm continuous casting round cast billet rolling offshore platform leg steel material. The billet has a large unit weight, a hi...

Embodiment 2

[0033] Use qualified continuous casting round billets, with cross-sectional dimensions as attached figure 2 As shown, it is φ800mm. According to the conventional method, the continuous casting round billet is sent to the heating furnace to be heated to about 1250°C. After being discharged from the furnace, the billet that has deviated during the roller table transportation is pushed to the straight and the centering rolling line by the pusher and the clamping plate. It is sent to the rough rolling mill for multi-pass rolling (the pass type is as attached) image 3 Shown), a total of 9 passes are rolled, and the cross section of the rolled billet is shown in the attached file. Figure 5 As shown, the height is 330mm and the width is 695mm. Then, the produced offshore platform legs are hoisted and collected with steel raw materials to complete the production process.

[0034] The invention is suitable for φ650mm~φ800mm continuous casting round cast billet rolling offshore platfor...

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Abstract

The invention belongs to the field of iron machining and particularly relates to an ocean platform pile leg steel raw material rolling method. The ocean platform pile leg steel raw material rolling method comprises the followings steps of (1) feeding continuous cast round billets with the section diameters from 650 to 800mm to a heating furnace, heating to 1220 DEG C and 1250 DEG C and descaling after discharging; (2) feeding the round billets after descaling to a roughing mill to be rolled repeatedly, wherein the number of pressing times is from 7 to 9 and a roll pass system of the roughing mill is a box-box roll pass system. According to the ocean platform pile leg steel raw material rolling method, the existing large bar material technology equipment is utilized, the investment is greatly reduced, the energy consumption is reduced, the production rate is improved, the costs are reduced, and the single blank weight is large, the compression ratio is high, and the interior quality of produced raw materials is good when the large-section continuous casting cast round billets are adopted to be rolled.

Description

Technical field [0001] The present invention belongs to the field of steel processing. Specifically, the present invention relates to a method for rolling steel raw materials for the leg of an offshore platform. Background technique [0002] At present, there are generally the following methods for the production of blanks for extra-thick plates: The production process of extra-thick plates generally refers to steel plates with a thickness of 20-60mm in my country as thick plates, and steel plates with a thickness greater than 60mm as extra-thick plates. The production process of thick plate and extra-thick plate billet generally uses flat steel ingots, forging billets, blooming slabs and continuous casting slabs. The existing blank production process has the following shortcomings: (1) Continuous casting slab has become the main blank for thick plate production, but due to technical and equipment limitations, the compression ratio is insufficient when producing extra-thick plates...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/20
CPCB21B1/20
Inventor 刘超群马丙涛陈良张继奎闻小德梁艳尹崇丽刘兵葛本伍陈树振王宝谭永彦刘亚丽
Owner SHANDONG IRON & STEEL CO LTD
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