A method for preparing amorphous thin strip by single-roll rapid quenching with concave rotary table

Abstract

The invention discloses a method for preparing an amorphous thin belt by utilizing rapid quenching of a concave-surface rotating-disc type single roll, and belongs to the technical field of preparation of the amorphous thin belt. The method is characterized in that the concave-surface rotating-disc type single roll is adopted; a single roll obtained by inward missing of an inverted cone at the top end of a cylinder is the concave-surface rotating-disc type single roll; the inner side surface of the concave-surface rotating-disc type single roll is the concave surface; the diameter of the concave surface is reduced gradually and inwards, i.e., the bottom surface of the missed cone is positioned at the top end of the cylinder; melt is sprayed on the concave surface of the inner side of the concave-surface rotating-disc type single roll rotating around a central axis of the cone, so that the direction of the centrifugal force applied on the melt is changed from the upward direction vertical to the contact surface of the cylindrical single roll into the direction which forms an included angle with the contact surface and points at the inner part of the contact surface, and then the melt is automatically separated from a roller under the actions of self shrinkage and centrifugal force in cooling the amorphous thin belt at the edge of the concave surface of the inner side. The thin belt prepared by the method is thinner in size, higher in surface finish and better in performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of amorphous thin strips, and relates to a novel single-roller stripping method to solve the problems of liquid droplets splashing and difficult strip formation during the stripping process, in particular to a concave single-roller stripping method. technical background [0002] Single roll quick quenching method, also known as melt cooling roll spin coagulation method, continuous casting thin strip method. A method invented by Bedell to produce amorphous ribbons, such as figure 1 and figure 2 shown. The molten metal sprays on the surface of the cooling roll rotating at high speed and spreads under the action of gravity and wetting to form a molten pool; the interface layer between the molten pool and the cooling roll is quenched and solidified, and rotates with the cooling roll to continue cooling to form a thin metal strip; Thin metal strip detaches from the rim surface of the roller und...

AI Technical Summary

Problems solved by technology

[0021] The purpose of the present invention is to provide a new method of throwing strips, which overcomes the problems in the prior art, that is, solves the splashing of the melt droplets of the fast-setting thin strips in the single-roller fast-setting thin strip method, the difficulty of forming strips, and the existence of thin strips. Defects, bubbles, etc.

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