Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1993-10-06
1995-01-17
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164475, B22D 1106
Patent
active
053818563
ABSTRACT:
According to the present invention, in the PFC (planar flow casting) method, He gas at room temperature is blown onto the surface of a cooling roll at a flow rate of 0.1 to 5 liters/min.multidot.cm.sup.2 through a He gas blow nozzle provided upstream of a molten alloy (a puddle) ejected through a molten alloy ejection nozzle onto the surface of the cooling roll at a distance from the ejection nozzle, the distance from the surface of the cooling roll and an angle of inclination of the nozzle within respectively specified ranges, thereby forming a He gas atmosphere around the puddle, and a thin strip is dragged out of said puddle. This enables a thin amorphous alloy strip having a very small thickness and a smooth surface free from significant uneven portions and pores to be easily produced at a low cost without use of any vessel for regulating the atmosphere or an apparatus for heating the blown gas.
REFERENCES:
The 26th Seminar of the 147th Committee of Amorphous Materials in Japan Society for the Promotion of Science Journal of Materials Science 16 (1981) pp. 2419-2433, "Production of Metallic Glass Ribbons by the Chill-Block Melt-Spinning Technique in Stabilized Laboratory Condition", Davor Pavuna.
International Journal of Rapid Solidification, 1991, vol. 6, pp. 285-295, "Effect of Arc Plasma Heating on the Air Pocket Formation During the Planar Flow Casting", Wen-Kuan Wang, et al.
Chida Hiromi
Fujikura Masahiro
Hasebe Fumio
Sato Takashi
Yamada Toshio
Lin Kuang Y.
Nippon Steel Corporation
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