Apparatus and method for casting amorphous metal alloys in an adjustable low density atmosphere

A gas environment, metal casting technology, applied in the field of molten metal casting metal strip, can solve the problem of insufficient reduction of metal strip, and achieve the effects of reducing the formation and retention of bubbles, uniform finish, and uniform strip thickness distribution

Inactive Publication Date: 2005-04-27
METGLAS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] But conventional methods cannot adequately reduce the variation of surface defects across the width of the metal strip

Method used

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  • Apparatus and method for casting amorphous metal alloys in an adjustable low density atmosphere
  • Apparatus and method for casting amorphous metal alloys in an adjustable low density atmosphere
  • Apparatus and method for casting amorphous metal alloys in an adjustable low density atmosphere

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[0075] The effect of the inventive casting system on the strip thickness distribution during casting was investigated.

[0076] as per Figure 4 A burner was constructed as described in ~8 with six individually controllable gas valves, nozzles and combustion chambers, each approximately 2 inches wide. The burner is used in an attempt to control the ribbon thickness distribution in the ribbon dispersing section by adjusting the gas flow in the dispersing section without significantly affecting the other sections.

[0077] First, the airflow through all six nozzles was adjusted so that all nozzles supplied the same airflow (approximately 10 liters / minute per nozzle). System adjustments are made so that casting takes place as much as possible without changing the airflow in individually controllable areas. Thus obtaining the best possible casting. The x-ray device is configured to pass the width of the belt as the belt moves through the x-ray device. Therefore, all thickness ...

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Abstract

An apparatus and method for casting metal strip includes a moving chill body that has a quench surface. A nozzle mechanism deposits a stream of molten metal on a quenching region of the quench surface to form the strip. The nozzle mechanism has an exit portion with a nozzle orifice. A depletion mechanism includes a plurality of independently controllable gas nozzles to supply a reducing gas to multiple zones of a depletion region located adjacent to and upstream from the quenching region. The gas flow profile can be controlled in each zone independently of controlling the gas flow in other zones. The reducing gas reacts exothermically to lower the density to provide a low density reducing atmosphere within the depletion and substantially prevent formation of gas pockets in the strip.

Description

technical field [0001] The present invention relates to direct casting of metal strip from a melt. In particular, the invention relates to the rapid solidification of amorphous metal alloys directly from a melt to form a substantially continuous metal strip. Background technique [0002] Casting very smooth strips is difficult by conventional means due to gas surface defects formed by air bubbles trapped between the quenched surface and the molten metal during quenching. These defects, among other factors, result in significant roughness on the quenched surface side and the opposite free surface side of the cast strip. In some cases, surface defects actually extend through the tape and form perforations in it. Additionally, the uniformity of these surface defects can vary across the width of the cast metal strip. [0003] US Patent No. 4,142,571 to M. Narasimhan discloses a conventional apparatus and method for rapidly quenching a stream of molten metal to form a continuou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/00B22D11/06B22D11/106B22D11/112C22C19/00C22C45/02
CPCB22D11/0697B22D11/06
Inventor S·D·阿尔伯特S·姆约津D·W·帕尔姆P·L·罗伯茨
Owner METGLAS INC
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