Roll curve of continuous caster with continuous bending section and two continuous straightening sections

Abstract

The invention relates to a conticaster roller row curve with continuous bending segment and two continuous straightening segments, its character: it is a smoothly linked curve by vertical segment, continuous bending segment, basic arc segment, first continuous straightening segment, transition arc segment, second continuous straightening segment and horizontal segment. The whole roller row is composed of fixed rollers, and its curvature varies continuously. It can effectively avoid or reduce the inner crack of cast ingot and incidental partial separation, and simplifies the devices in continuous bending and straightening segments, and reduces the height of the conticaster.

Description

technical field [0001] The invention belongs to the field of continuous steel casting, and relates to a straight-arc type (or called vertical bending type) continuous casting machine roll curve (roller line of continuous casting machine) which is entirely composed of fixed roll lines and has continuous bending and straightening sections. The curve refers to the movement track of the outer arc side of the billet moving in the continuous casting machine) and the arc-shaped continuous casting machine roll curve with only continuous straightening sections, especially a low-height one with two continuous straightening sections. Roll curves of straight arc and arc continuous casting machines. Background technique [0002] At present, all known straight arcs with bending and straightening sections and only arc-shaped continuous casting machine rolls with straightening sections (see Figure 7 , Figure 8 ), the slabs are all bent and straightened under the condition of having a liq...

AI Technical Summary

Problems solved by technology

There are some deficiencies in the above-mentioned bending and straightening sections: multi-point bending and straightening make the billet produce a large mutation of strain ε and a large strain rate in the process of bending and straightening Peak value; progressive bending and straightening make the slab produce non-linear strain ε and the corresponding strain rate The larger the peak value, the larger the strain rate It is easy to cause internal cracking of the slab

The main disadvantage of this curve is that when it is connected with a straight line segment in the continuous casting machine roll curve, there is a sudden change in curvature at the connection point, which causes the slab to produce a sudden change in bending strain ε and the corresponding Strain rate peak value, which is unfavorable to prevent internal cracking of the slab

Therefore, this curve can only be used in the bending section of the arc continuous casting machine, and it cannot be used in the bending and straightening section of the straight arc continuous casting machine, nor can it be used in the straightening section of the arc continuous casting machine

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