Directional freeze steel ingot side wall double-layer hollow adiabatic apparatus

A double-layer hollow, directional solidification technology, applied in the field of metallurgical industry production technology, can solve the problems of large temperature gradient, unfavorable columnar crystal growth, and reduce the quality of steel ingots, achieve large air thermal resistance, reduce heat transfer, and improve ingot quality. Effect

Pending Publication Date: 2007-03-07
UNIV OF SCI & TECH LIAONING
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Problems solved by technology

The disadvantage is that while cooling, the side wall of the mold also produces a large temperature gradient, which is not conducive to the growth of columnar crystals and affects product quality.
The appearance of equiaxed grains will destroy the longitudinal mechanical properties in the steel ingot and reduce the quality of the steel ingot

Method used

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  • Directional freeze steel ingot side wall double-layer hollow adiabatic apparatus

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Embodiment Construction

[0013] The present invention is described in detail below in conjunction with accompanying drawing:

[0014] As shown in Figure 1, the device is provided with two layers of heat insulating material inside the mold filled with molten steel 7, an outer layer of heat insulating material 3 and an inner layer of heat insulating material 5, and an insulating gas layer 8 filled with air is arranged between the two layers of heat insulating material. The inner heat-insulating material 5 is in contact with the molten steel 7; heat-preserving and heating agents 6 and 4 are arranged on the upper part of the molten steel 7 and the insulating air layer 8; the water-cooling chassis 1 is arranged at the bottom of the device.

[0015] The water-cooled chassis 1 and the mold 2 are made of cast iron, wherein the water-cooled chassis 1 is equipped with connected water pipes, and water inlet and outlet devices are installed on both sides of the chassis to cool the molten steel and reduce the tempe...

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Abstract

The invention relates to a directional solidify steel ingot side wall dual-layer hollow heat insulator. Wherein, said device has two layers of thermal insulated materials at the inner side of casting section filled with steel liquid; there is thermal insulated gas layer between said two layers; the inner layer contacts the steel liquid; the steel liquid and thermal insulated gas layer have thermal insulated heater above; the water cold basis is at the bottom. Compared with present technique, the invention has high thermal insulation effect, to reduce the thermal conduction of side wall, to support the growth of post crystal and improve the quality of casting ingot.

Description

technical field [0001] The invention relates to the technical field of metallurgical industry production technology, and is a double-layer hollow heat insulation device applied to the production of high-quality steel ingots for directionally solidified steel ingot side walls. Background technique [0002] Directional solidification refers to the use of forced means in the solidification process to establish a temperature gradient in a specific direction in the solidified metal and unsolidified metal melt, so that the melt solidifies in the direction opposite to the heat flow, and finally obtains a columnar crystal with a specific orientation. Technology. Directional solidification technology can better control the grain orientation of the solidified structure, eliminate the transverse grain boundary, obtain columnar or single crystal structure, and improve the longitudinal mechanical properties of the material. The steel ingots produced can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/04B22D7/06
Inventor 沈明钢苗信成高巨伟张凤清张世平
Owner UNIV OF SCI & TECH LIAONING
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