A rolling method of steel raw materials for offshore platform pile legs

A technology of offshore platform and pile legs, which is applied in the direction of metal rolling, etc., to achieve the effect of reducing investment, reducing energy consumption and high yield

Active Publication Date: 2016-12-07
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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  • A rolling method of steel raw materials for offshore platform pile legs
  • A rolling method of steel raw materials for offshore platform pile legs
  • A rolling method of steel raw materials for offshore platform pile legs

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Embodiment 1

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

[0031] The invention is suitable for continuous casting circular casting slabs of φ650mm~φ800mm to roll steel raw m...

Embodiment 2

[0033] Continuous casting round billets with qualified quality, the cross-sectional dimensions are as attached figure 2 As shown, it is φ800mm. According to the conventional method, the continuous casting round billet is sent into the heating furnace and heated to about 1250 °C. After being released from the furnace and descaled, the billet that deviates during the roller table transportation is pushed, centered, and rolled. Send it to the rough rolling mill for multi-pass rolling (the pass is as attached image 3 shown), a total of 9 passes were rolled, and the cross-section of the billet after rolling is shown in the attached Figure 5 As shown, the height is 330mm and the width is 695mm. Then, the steel raw materials for the produced offshore platform legs are hoisted and collected to complete the production process.

[0034] The invention is suitable for continuous casting circular casting slabs of φ650mm~φ800mm to roll steel raw materials for offshore platform pile le...

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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 invention belongs to the field of steel processing, in particular, the invention relates to a rolling method of steel raw materials for offshore platform pile legs. 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 In my country, steel plates with a thickness of 20-60 mm are generally called thick plates, and steel plates with a thickness greater than 60 mm are called extra-thick plates. The production process of the billets of thick plates and extra thick plates generally adopts flat steel ingots, forging billets, blooming slabs and continuous casting slabs. The defects of the existing billet production process are: (1) The continuous casting slab has become the main billet for thick plate production, but due to the limitation of technology and equipment, the compression ratio is not enough for the production of extra ...

Claims

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Application Information

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Patent Type & Authority Patents(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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