A sector-shaped roll row structure for continuous casting solidification end under heavy pressure and its application method

Abstract

The invention belongs to the field of continuous casting production and particularly relates to a fan-shaped section roller column structure used under continuous casting solidification tail end heavypressure, and an application method. A fan-shaped section roller column is of a horizontal section roller column structure and comprises four pairs of clamping rollers; the first pair of clamping rollers and the third pair of clamping rollers at an inlet of a fan-shaped section serve as driving rollers and the other clamping rollers serve as driven rollers. The diameters of the first pair of clamping rollers are greater than those of the other three pairs of clamping rollers, so that the effect under single-point heavy pressure is exerted, the 3-20 mm single-point pressure amount is exerted on the upper driving rollers at the inlet of the fan-shaped section, the strain rate of a casting blank core area can be increased effectively, welding of a central shrinkage cavity is facilitated, andthe density of a casting blank core is increased advantageously. Upper supporting rollers of the third pair of clamping rollers are connected with hydraulic clamping cylinders, so that continuous pressure of a casting blank is ensured, and deformation due to the fact that the casting blank is bounced is avoided; continuous blank pressure with the pressure rate of 1.0-5.0 mm / m is carried out on the upper supporting rollers at the back of the fan-shaped section, so that the pressure amount of the casting blank is not bounced, a blank housing of the casting blank is forced to contract continuously, and the looseness due to the fact that the internal contracting rate and the external contracting rate of the casting blank are not identical is improved.

Description

technical field [0001] The invention belongs to the field of continuous casting production, and in particular relates to a sector-shaped roll row structure and a use method for continuous casting solidification end under heavy pressure. Background technique [0002] With the rapid development of manufacturing industry and science and technology, higher requirements are put forward for the internal quality of steel products. Central porosity and central shrinkage cavity are the main factors restricting the internal quality of continuous casting slabs. Therefore, the solidification end heavy reduction technology is proposed. The heavy reduction technology at the end of continuous casting solidification is to make full use of the characteristics of the large temperature difference between the surface and core of the slab at the end of the slab solidification, and carry out a large deformation reduction on the slab so that the reduction can fully penetrate into the core of the sl...

AI Technical Summary

Problems solved by technology

[0005] However, the current design of the heavy-pressed roll row at the end of solidification is difficult to meet the technological requirements of a reduction of more than 15mm. With the increase of the reduction, the strength and rigidity of the roll row should also be greatly improved to ensure the internal quality of the continuous casting slab and Equipment Safety and Reliability

If the diameter of the roll row is increased on the basis of the current heavy-pressed roll row at the end of solidification, the reduction amount of more than 15mm can also be achieved, but the size and weight of the matching fan-shaped section will be greatly increased, which will bring the fan-shaped section. A series of new problems such as hoisting and maintenance

Images