Thin strip consisting of fe-base amorphous alloy having large thickness

TLDR: In this article, the authors proposed a method of increasing the pressure over the entire part of the atmosphere and exerting pressure to the paddle itself or superposing the 2nd paddle on the unsolidified thin strip emitted from the paddle and pressing the same.

Abstract: PURPOSE:To manufacture a titled thin strip having a good surface of specific thickness and width or above by subjecting the unsolidified free surface side, on a cooling bare body, of the thin alloy strip drawn out of a paddle to pressurization by direct injection of gas, etc. thereby intensifying forced cooling and heat contact and increasing the solidifying rate. CONSTITUTION:A thin alloy strip drawn out of a paddle at a high speed is quickly cooled as it travels at an equal speed on a cooling bare body. The unsolidified free surface thereof is pressurized by the cooling gas injected directly thereto and the heat contact with the bare body is increased to increase the solidifying rate. The thickness of the thin strip consisting of the Fe amorphous alloy is made to >=45mum thinkness, >=20mm. width and <=0.5mum free surface Ra with respect to 0.8 cut-off value in surface roughness by such increase in the solidifying rate. The roll surface is also made to <=0.5mum Ra. The increase in the cooling method is executed by a method of increasing the pressure over the entire part of the atmosphere and exerting pressure to the paddle itself or superposing the 2nd paddle on the unsolidified thin strip emitted from the paddle and pressing the same.