Method of producing weld metal tubing empoying a reusable mandre

Details Method of producing weld metal tubing empoying a reusable mandre Method of producing weld metal tubing empoying a reusable mandre

1988-04-29

1989-05-16

Godici, Nicholas P.

Metal fusion bonding

Process

Plural heat applying

228119, 228228, 219 7615, B23K 3102, B23K 3524

Patent

active

048302660

ABSTRACT:
A method of producing substantially distortion-free weld metal tubing wherein a mandrel and a thin metal layer covering the mandrel are used to provide structural support for a starter tube while a weld metal is being deposited on the exterior surface of the starter tube to a desired thickness. The material used for the thin metal layer is selected to have a lower melting temperature than that of the mandrel, starter tube and weld metal, and after the weld metal deposit process is completed, the entire assembly is heated to a temperature in excess of the melting temperature of the thin metal layer, the molten material is flowed out from between the mandrel and the starter tube, thereby facilitating extraction of the mandrel from the weld metal tubing.

REFERENCES:
patent: 2813190 (1957-11-01), Felmly
patent: 2947078 (1960-08-01), Pflumm
patent: 3481024 (1969-12-01), Bunn
patent: 3611541 (1971-10-01), Garrett
patent: 4097711 (1978-06-01), Banerjee
patent: 4660756 (1987-04-01), Geisseler

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