Method of producing bimetallic tubes and the tubes obtained by t

Details Method of producing bimetallic tubes and the tubes obtained by t Method of producing bimetallic tubes and the tubes obtained by t

1990-01-03

1991-04-09

Heinrich, Sam

Metal fusion bonding

Process

Encasing a rodlike core within a substantially coextensive...

228265, 228194, 228248, B23K 2000, B23K 2016, B23K10106

Patent

active

050057561

ABSTRACT:
The method according to the invention relates to the production of a bimetallic tube, the cross-section of which comprises an outer annular zone and an inner annular zone, these zones being of different compositions. The method resides in preparing a blank (1) comprising two tubular components (2, 3) housed one inside the other and of different compositions and separated by an annular space (4) which is filled with divided metal. The whole assembly is made rigid by two end pieces (7, 8) and coextrusion is carried out at a suitable temperature to ensure a metallurgical bond between the inner component (2) and the outer component (3). The bimetallic tube obtained is particularly suitable for uses in which one of its two outer or inner walls is exposed to a medium which is more aggressive than the other.

REFERENCES:
patent: 4765529 (1988-08-01), Turner

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