Method for manufacturing a compound pipe

Details Method for manufacturing a compound pipe Method for manufacturing a compound pipe

1990-05-31

1991-12-03

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 19, 419 28, 419 49, 419 39, 419 54, 419 55, B22F 700

Patent

active

050698664

ABSTRACT:
A method of preparing a compound pipe, the wall of which comprises an inner layer of a first material and an outer layer of a second material. Powders of the two materials are isostatically hot pressed to form a cylindrical tubular blank in which the first material forms an inner layer and the second material forms an outer layer, the blank after heating to a suitable temperature being extruded over a mandrel.

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patent: 4935198 (1990-06-01), Tornberg

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