Method for producing an amorphous metal foil using rapid solidification technology

The rolling device smooths the casting wheel surface to prevent contamination, addressing surface roughness and wetting defects, resulting in amorphous metal foils with fewer holes and improved mechanical reliability for longer continuous production.

DE102019122524B4Active Publication Date: 2026-06-25VACUUMSCHMELZE GMBH & CO KG
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Patent Information

Application Number
DE102019122524
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2019-08-21
Publication Date
2026-06-25
Estimated Expiration
2039-08-21

AI Technical Summary

Technical Problem

Existing methods for producing amorphous metal foils result in inhomogeneous strip quality due to thermomechanical stress, leading to surface roughness and wetting defects, which cause holes and reduce the lamination factor, especially in thin foils less than 20 µm thick, limiting continuous production lengths and increasing breakage risk.

Method used

A method involving a rolling device that smooths the casting wheel surface during production, using a non-abrasive process to prevent contamination and maintain surface quality, ensuring a maximum of 50 holes per square meter and reducing surface roughness to enhance homogeneity and mechanical reliability.

Benefits of technology

Enables the production of amorphous metal foils with fewer holes and improved mechanical properties, allowing longer continuous lengths and reduced breakage risk, enhancing productivity and maintaining magnetic properties in thin films.

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Abstract

Method for producing an amorphous metal foil using rapid solidification technology comprising: Providing a melt of an iron-based alloy, Pouring the molten metal onto a moving outer surface of a moving heat sink, whereby the molten metal solidifies on the outer surface and forms an amorphous metal foil, Continuously pressing a rolling device against the outer surface of the cooling element while the melt is poured onto the moving outer surface of the cooling element, with a contact pressure for the rolling device sufficient to smooth the outer surface of the cooling element. wherein the rolling device has a cladding and during the pouring of the melt onto a pouring track of the moving outer surface of the moving cooling element, the outer surface is protected at least at the pouring track from contamination with organic material, and Manufacturing the amorphous metal foil, wherein the amorphous metal foil has a width of 2 mm to 300 mm, a thickness of less than 20 µm, and fewer than 50 holes per square meter.
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