Bulb Type Continuous Casting Mold Mandrel

Abstract

The invention discloses a bulb type continuous casting crystallizer core rod. The curvature of the central axis of the mandrel matches the continuous casting machine, and the design size of each section is different; the cross-section shape of the A end of the mandrel is a convex quadrilateral, and each side is composed of a straight line sandwiched between two arcs, and an excessive circle Angle connection; the cross-sectional shape of the B-end of the mandrel is a rounded rectangle; the outer contour of each section of the mandrel forms a compound line of continuously variable taper; the average taper of the mandrel A-end shape line is greater than that of the B-end; the mandrel cross-section consists of The convex quadrilateral gradually becomes a rectangle, and the taper of the shape line gradually decreases, resembling a light bulb in shape. The copper tube prepared by processing this kind of mandrel can better fit the solidification surface of the continuous casting slab, and is closer to the solidification and forming law of the billet continuous casting slab, reducing the thermal resistance of the mold system, improving the heat transfer performance of the mold, and accelerating The casting speed of the continuous casting machine reduces the wear and tear of the copper pipe and increases the service life, and solves the shape defects and surface quality problems caused by uneven cooling of the corners and faces of the continuous casting billet.

Description

technical field [0001] The invention belongs to the technical fields of continuous casting technology, metal solidification temperature field, and thermal stress shrinkage displacement field, and specifically relates to a bulb-shaped mandrel used for preparing copper tubes of continuous casting crystallizers. Background technique [0002] Continuous casting technology is an important technology in the field of iron and steel smelting, and the mold is the core of the continuous casting machine. Molten steel is poured into the copper tube of the crystallizer, and billets are continuously produced after efficient heat exchange. This process is the continuous casting production process. At present, most domestic continuous casting billet mold copper tubes have a single taper or parabolic inner cavity. The cross-section of the copper tube is rectangular. When the casting speed of the continuous casting machine is increased and the production rhythm is accelerated, it cannot well ...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention researches and designs a bulb-type continuous casting crystallizer mandrel, which is used as a mold to extrude and process the inner cavity of the crystallizer copper tube to solve the problem of the existing single taper or parabolic taper crystallizer copper tube. Uneven cooling of the corner face, limited thermal conductivity, slow casting speed of continuous casting machine, low production efficiency, wear of the inner cavity of the copper tube, and poor quality of the surface of the billet and its subcutaneous tissue, etc.

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