Laminar barrier inert fluid shield apparatus

Details Laminar barrier inert fluid shield apparatus Laminar barrier inert fluid shield apparatus

1992-06-22

1993-11-02

Seidel, Richard K.

Metal fusion bonding

Process

With protecting of work or filler or applying flux

228 42, 21913742, B23K 3102

Patent

active

052577325

ABSTRACT:
The present invention relates to processes and apparatus for welding or joining metal parts which comprise moving a welding torch in a direction along a joint between said parts, causing a molten pool of metal with said welding torch along the joint and directing a laminar flow of inert fluid toward a freshly welded area behind said welding torch in the form of a trailing shield whereby the freshly welded area is protected from the surrounding air during its solidification. The laminar flow or inert fluid may also be directed along the joint ahead of the welding torch in the form of a leading shield such that turbulence in and around the joint caused by a high welding speed is reduced, thereby preventing oxygen entrainment in said molten pool of metal. The laminar flow of inert fluid is usually provided through at least one diffuser having at least one porous diffusing surface which is generally provided with a screen and/or a spatter shield.

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