Continuous cast slab head and tail shape pre-controlling method capable of reducing hot-rolled intermediate slab head and tail cutting quantities

一种连铸坯、头部形状的技术，应用在金属轧制、金属轧制、制造工具等方向，能够解决中间坯头尾形状成材率损失等问题

Inactive Publication Date: 2013-08-21
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But even with all the means, yield loss due to poor head and tail shape of the intermediate billet is still a major factor

Method used

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  • Continuous cast slab head and tail shape pre-controlling method capable of reducing hot-rolled intermediate slab head and tail cutting quantities
  • Continuous cast slab head and tail shape pre-controlling method capable of reducing hot-rolled intermediate slab head and tail cutting quantities
  • Continuous cast slab head and tail shape pre-controlling method capable of reducing hot-rolled intermediate slab head and tail cutting quantities

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] In order to verify the pre-control effect of the shape of the slab head and tail, the slab cutting and rolling tests were carried out in hot rolling. Taking the test as an example, the pre-control method of the shape of the slab head and tail, the head and tail cut amount of the intermediate slab after rolling and the effect on reducing the cut amount are introduced.

[0050] Slab condition: In order to verify the control effect of the slab head and tail shape pre-control under different bow heights, four groups of experiments were designed. Two slabs with the same thickness and width specifications were selected for each group of tests, one of which was pre-controlled for the shape of the head and tail (the arc bow height of the head is concave, and the arc bow height of the tail is convex), and the other is Conventional cuboid slabs are used for comparison. A total of eight slabs were selected. See Table 1-1 to Table 1-4 for slab-related data.

[0051] Table 1-1 Th...

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Abstract

A pre-control method of head and tail shapes of continuous casting slab for reducing the removed amount from the head and tail of hot-rolled intermediate slab. By a pre-control cutting process for the head and tail shapes of continuous casting slab, the slab is cut into a shape such that its head end surface dents inwards and its tail end surface extrudes towards outside of the slab. In the pre-control cutting process, the head and tail shapes of the slab is cut in accordance with the curve which is linearly symmetrical with respect to the width center of the slab, and the arch height (i.e., the maximum value of the denting portion of the head or the extruding portion of the tail) is controlled in the range of 0 mm to 50 mm. In such a manner, the length of the non-uniform deformation portions of the head and tail of the intermediate slab can be significantly reduced, and thus the reduction of the removed amount from the head and tail of hot-rolled intermediate slab is achieved.

Description

technical field [0001] The invention relates to a method for pre-controlling the shape of the head and tail of a continuous casting slab. Background technique [0002] With the continuous improvement of the continuous casting-hot rolling production process, the hot-rolled billet is changed from the original blooming billet to the continuous casting billet. Generally, more than 90% of hot-rolled billets come from continuous casting. [0003] The molten steel is cast through continuous casting and cut after solidification, and the cut continuous casting slab is sent to hot rolling for rolling. At present, the method of cutting the continuous casting slab into a cuboid is all adopted in the world. [0004] The conventional hot continuous rolling production line is composed of heating furnace, rough rolling, finish rolling, laminar cooling and coiling equipment. In the rough rolling area, there are roller tables, descaling machines, slab fixed width presses, rough rolling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/46
CPCB22D11/163B21B1/46B22D11/126B21B1/466B21B2015/0014Y10T83/04B21B15/00
Inventor 单旭沂张所全黄利丁鸿儒王自强朱蔚林王全胜
Owner BAOSHAN IRON & STEEL CO LTD
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