Two-way extrusion type thick slab directional solidification method and device thereof

Abstract

The invention discloses a two-way extrusion type thick slab directional solidification method and a device thereof. The method includes the steps that extrusion heads are arranged at the two ends of a directional casting mold, and cooling water is injected into the extrusion heads for cooling; the solidification coefficient beta of a water cooling device is calculated; the flow and the flow speed of the cooling water in the water cooling device are determined; the extrusion heads apply pressure inwards to extrude a steel ingot inwards; the pressing start time is determined; the pressing quantity is calculated; the pressing speed is calculated; and production operation is conducted. The device comprises the directional casting mold, a pouring gate, carbon heating units, a slag trap, a sprue, a slag and steel discharge opening, a linkage rod, a hydraulic system, a computer, the water cooling extrusion heads, water inlets and water outlets. Column crystal structures which vertically and reversely grow are added through a two-way horizontal directional solidification process, extra-thick slabs with super-long columnar crystals are produced, and the thickness of the extra-thick slabs is remarkably increased; and center solute enriched molten steel is eliminated through extrusion and center porosity shrinkage cavities are effectively pressed, and production can be flexibly and effectively conducted.

Description

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AI Technical Summary

Benefits of technology

This technology improves upon current methods that use columns or wafers made from materials called metallic powders like iron (Fe). By adding these particles into liquid metal during this process, they form tiny structures inside them where there are many small holes between each particle's surface. These tiny structures help prevent cracks when castings containing such fine grains have been formed due to thermal expansion differences caused by temperature changes over time. Additionally, this method allows for more precise control on how much material needs to be added while still producing high quality products.

Problems solved by technology

Technological Problem addressed in this patents relating to producing ultrafine (less) thin sheets from massive metals involves challenging methods like conventional hot strip cathode sintering and cold fusion bonding due to their size limitations. These technical solutions involve developing new ways to achieve efficient mass productivity while maintaining conformance within strict specifications.

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