Narrow-edge copper plate for slab mold with continuous variable taper at corner

Abstract

The invention discloses a narrow-edge copper plate for a slab mold with a continuous variable taper at the corner, relates to machinery or equipment in metal continuous casting and in particular to a manufacturing or casting mold plate for a bottom opening mold for metal continuous casting. An upper mouth profile curve of the narrow-edge copper plate is formed by connection of an upper mouth straight line, a funnel curve, an upper mouth oblique line and an upper mouth arc; the funnel curve is continuous with an oblique line curvature; the two ends of the upper mouth arc are tangent to the upper mouth oblique line and the upper mouth straight line respectively; the taper of a chamber part of the narrow-edge copper plate of the slab mold is continuously decreased in the height direction of the slab mold progressively; the progressive decrease speed of the taper is gradually slow; and the length of the profile of the horizontal cross section of the narrow-edge copper plate of the slab mold continuously varies downwards in the height direction of an upper mouth of the slab mold so as to form a corner funnel region with a funnel-shaped curve with the taper to be decreased progressively and shrink. According to the narrow-edge copper plate, local stress concentration generated in the movement deformation and shrinkage process of a billet shell can be prevented, the narrow-edge copper plate is suitable for differences of solidification shrinkage coefficients of different kinds of steel, and the application range of the kind of the steel is enlarged.

Description

technical field [0001] The present invention relates to machinery or equipment for continuous casting of metals, and more particularly to the manufacture of open-bottomed molds or mold stock for continuous casting of metals. Background technique [0002] The slab mold is a very important part of the continuous casting machine, called the "heart" of the continuous casting equipment. The basic structure of the crystallizer is a forced water-cooled bottomless steel ingot mold, which is composed of two relatively wide-side copper plates (also known as wide-side copper plates) and two relatively narrow-side copper plates (also known as narrow-side copper plates). Its function is (1) at the highest possible pulling speed, ensure the thickness of the shell of the mold, through the vibration of the mold, the shell is separated from the wall of the mold without being broken and breakout. (2) Guarantee the uniform and stable generation of the billet shell. (3) Make the molten steel ...

AI Technical Summary

Problems solved by technology

[0012] The object of the present invention is to provide a narrow side copper plate with chamfered slab crystallizer with a uniform shrinkage surface shape, so as to solve the length shrinkage rate of the cross-sectional contour curve of the crystallizer cavity in the pouring direction in the prior art solution The problem of inconsistency makes the natural shrinkage of peritectic steel and sub-peritectic steel more consistent with the shrinkage of the mold, the corners of the slab shell and the copper plate are in closer contact, the corner structure is refined, and the crack resistance of the primary shell is enhanced. So as to more effectively eliminate the crack defects at the corners of the slab

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