Composite break ring method

Details Composite break ring method Composite break ring method

1987-01-27

1987-12-29

Godici, Nicholas P.

Metal founding

Process

Shaping liquid metal against a forming surface

164 75, 264 81, 249114R, B22D 1900

Patent

active

047154233

ABSTRACT:
A method of forming a break ring by providing a frame having a cross-section complementary to the exterior portion of the break ring, and the frame having an interior base of the cross-section of the break ring which will be in contact with the molten metal in the continuous caster is disclosed. The frame is thereafter filled with plasma sprayed boron nitride, silicon nitride, or whatever material is to immediately contact the metal in the horizontal continuous caster. This is subsequently followed by the spraying of a substrate onto the skin of the break ring, whereafter the body portion is finally filled. Detonation gun-type spraying is also contemplated, but a plasma gun forms a superior coating and gives more flexibility. Finally, the body is formed interiorly of the break ring further by plasma application or by casting. In one option, a cooling tube is laid into the body portion. The break ring itself is characterized by a continuous construction with a skin preferably of boron nitride or related materials, a substrate of zirconium oxide or aluminum oxide or silicon carbide, and a body of copper or equivalent materials. Optionally the body contains a coolant tube which can be constantly flushed during the course of casting and maintain the break ring at a temperature below that of the metal being cast.

REFERENCES:
patent: 3642058 (1972-02-01), Webbere et al.
patent: 3726333 (1973-04-01), Goodrich et al.
patent: 4289447 (1981-09-01), Sterman et al.

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