Continuous casting production method of bloom gear steel slab

Abstract

The invention relates to a continuous casting production method for a bloom gear steel casting blank, is suitable for bloom gear steel casting blanks, the fracture surfaces of which are 360*450 mm, and belongs to the technical field of bloom gear steel production. Based on electromagnetic stirring of a crystallizer, an electromagnetic stirring device is additionally arranged between a secondary cooling zone and a solidification tail end, the mounting positions and working parameters of the secondary cooling zone and the solidification tail end are designed reasonably, and the degree of superheat, the casting speed, the cooling parameter and the like of casting molten steel are controlled in a combined manner, so that the compactness and the homogeneity of the bloom gear steel casting blankare enhanced. In addition, cooling of the corner of the casting blank is optimized by designing the circular bead parameters of the tubular crystallizer, so that corner defect control of the castingblank is improved. By improving a cooling water path, the heat transfer uniformity is ensured, so that the casting blank thicknesses at the outlet of the crystallizer are uniform. According to the method provided by the invention, the comprehensive quality of the bloom gear steel casting blank can be controlled at a high level.

Description

technical field

[0001] The invention relates to a continuous casting production method of a bloom gear steel slab, which is suitable for a 360mm×450mm section bloom gear steel slab and belongs to the technical field of bloom gear steel production. Background technique

[0002] Gears are important power transmission mechanical components. Gears in different working conditions and different parts have different stress conditions, and there will be differences in failure modes to varying degrees, and are affected by gear materials, processing technology, lubrication conditions, friction and gear geometric parameters. and load patterns and many other factors. The main failure modes are: tooth root fracture, tooth surface profile deformation caused by tooth surface depression, fatigue spalling, and wear are divided into adhesive wear and abrasive wear. According to the main failure modes mentioned above, the performance requirements for gear steel are high crush resistance and p...