Metal treatment – Process of modifying or maintaining internal physical... – Chemical-heat removing or burning of metal
Patent
1992-09-21
1994-04-19
Kastler, Scott
Metal treatment
Process of modifying or maintaining internal physical...
Chemical-heat removing or burning of metal
266 51, B23K 706
Patent
active
053042565
ABSTRACT:
A thermochemical scarfing method is disclosed which allows a greater diagonal standoff distance from the metal workpiece during preheating. The method includes preheating the end of the metal workpiece, and then scarfing the workpiece by directing a scarfing oxygen stream onto the workpiece at an acute angle and while moving the workpiece past the oxygen outlet port. The preheating step includes generating a high speed stream of oxidizing gas and a concentric stream of fuel gas coaxially about the central stream, so that the momentum of the central stream is maintained. As a result, the effective flame heating distance may be extended, and the manifold and head assembly which supports the preheating gas nozzles may be moved back from the workpiece a significant standoff distance so as to avoid damage from dislodged molten metal slag.
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Dawson, Jr. John G.
Gusky Frank J.
Showalter Michael S.
ESAB Welding Products, Inc.
Kastler Scott
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