Large cast steel roller casting mold and upper roller neck feeding process

Abstract

The invention discloses a large cast steel roller casting mold. The large cast steel roller casting mold comprises an upper roller neck casting mold. An upper roller neck cavity through from top to bottom is limited in the upper roller neck casting mold. The upper roller neck casting mold comprises an upper roller neck box body, two upper roller neck molding sand layers, a first heat preservationlayer, a riser casting mold, a second heat preservation layer and a riser molding sand layer. The two upper roller neck molding sand layers are arranged in the upper roller neck box body. The first heat preservation layer is arranged between the two upper roller neck molding sand layers. The riser casting mold is arranged above the upper roller neck casting mold. A riser cavity through up and downis limited in the riser casting mold. The riser cavity is communicated with the upper roller neck cavity. The riser casting mold comprises a riser box body. The second heat preservation layer is arranged in the riser box body. The riser molding sand layer is arranged between the riser box body and the second heat preservation layer. According to the large cast steel roller casting mold and upperroller neck feeding process, heat preservation of the upper portion of a roller during cooling is achieved, bottom-to-top cooling of the roller is facilitated, feeding of molten steel is better facilitated, use of raw materials is reduced, and therefore the production cost is reduced, waste is avoided, and more energy is saved and environment is protected.

Description

technical field [0001] The invention belongs to the technical field of rolls, and in particular relates to a large cast steel roll casting mold and an upper roll neck feeding process. Background technique [0002] Large-scale rolls, especially large-scale cast steel and semi-steel rolls for hot-rolled section steel, have a deep pass and a working layer thickness of 200mm. The diameter of the roll body is φ1000mm, and the diameter of the roll neck for transmission is φ300mm. The minimum roll neck diameter on the operating side is 200mm. A rolling mill for rolling large sheet pile steel has a direct roll body diameter of φ1600mm, a roll neck diameter of φ520mm on the transmission side, and a minimum roll neck diameter of 230mm on the operating side. In the traditional cast steel roll process, the diameter of the upper roll neck casting process is 60-70% of the diameter of the roll body, and the actual diameter is about 800mm and 1100mm. Subsequent processing needs to cut th...

AI Technical Summary

Problems solved by technology

A lot of processing time and energy are wasted, the processing efficiency is low, the strength of the rolled roll is lower, and casting defects such as core shrinkage and coarse grains are inevitable.

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