Curve design of rolling mill work roller for high-temperature large-rolling-reduction technology of large square billet and rectangular billet

Abstract

The invention relates to the field of continuous casting billet high-temperature large-rolling-reduction rolling mills, in particular to roll shape curve design of a rolling mill work roller for a high-temperature large-rolling-reduction technology of a large square billet and a rectangular billet. The roll shape curve design is particularly applied to the single-pass hot core or liquid core high-temperature large-rolling-reduction rolling process of the large square billet or the rectangular billet. The work roller achieves optimal combination of a flanged roller shape and a box type hole shape, and optimization design of the geometrical characteristics of the work roller is conducted through calculation. The flange width coefficient of a combined roller is 0.4-0.8, and the flange heightof the combined roller is 5-45 mm. The radius of a box type inner fillet of the combined roller is 10-40 mm, the inclination angle of the side wall of the combined roller is 90-120 degrees, and the diameter of the work roller is 500-1000 mm. After the work roller in a combined roller shape is applied to the high-temperature large-rolling-reduction rolling technology, the shrinkage cavity press fiteffect, in the thickness direction and the extension direction, of the flanged roller and the shrinkage cavity press fit effect, in the width direction, of the box type hole shape can be highlightedat the same time. In this way, the casting billet core deformation permeability and the central shrinkage cavity three-direction press fit effect in the single-pass high-temperature large-rolling-reduction rolling deformation can be improved to a greater extent.

Description

technical field [0001] The invention relates to the field of continuous casting slab high-temperature and high-pressure rolling mills, in particular to a method for designing the work roll curve of a rolling mill under high-temperature and high-pressure technology for blooms and rectangular billets, especially for single-pass hot cores for blooms and rectangular billets Or liquid core rolling process under high temperature and high pressure. Background technique [0002] With the rapid development of my country's national economy, the demand for high-quality steel products in various industries is increasing, and the inherent quality requirements for steel materials are also getting higher and higher. At the same time, iron and steel production technology is constantly updated, production efficiency is continuously improved, and it is constantly developing in the direction of high quality and low energy consumption. [0003] Continuous casting slab is the raw material for h...

AI Technical Summary

Problems solved by technology

Especially for thick continuous casting slabs, such as large section billets or rectangular billets and slabs, it is more difficult to eliminate the above loose shrinkage defects

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