Metal treatment – Compositions – Heat treating
Patent
1981-11-12
1983-05-31
Stallard, W.
Metal treatment
Compositions
Heat treating
266 74, 266 75, B23K 708
Patent
active
043859410
ABSTRACT:
A method for producing a molten puddle on the surface of a metal workpiece to be scarfed consists of igniting a mixture of fuel gas and oxygen. The resultant flame is used for heating a steel wire to a temperature of from 900.degree. to 1450.degree. C., whereupon the steel wire is intermittently fed into a stream of scarfing oxygen to produce droplets of molten metal, which are then transferred by a flow of scarfing oxygen on to the work surface. There is provided apparatus for carrying into effect the above method, which comprises a housing having ducts for supplying a fuel gas and oxygen formed on its periphery; an additional duct for supplying a fuel gas being made in the central part of the housing; a duct for feeding steel wire is provided in the housing in coaxial arrangement with the additional fuel gas supply duct; a scarfing oxygen feeding duct formed in the housing is interposed between the oxygen supply duct and the additional fuel gas supply duct. The duct for feeding a scarfing oxygen is made in the form of a tapered annular slot arranged to permit the stream of scarfing oxygen to be directed at one point on the surface of steel wire.
REFERENCES:
patent: 2317936 (1943-04-01), Nicholson et al.
patent: 2438344 (1948-03-01), Meincke
patent: 4042225 (1977-08-01), Jones et al.
Bogatyrev Anatoly D.
Daiker Artur L.
Kochengin Evgeny Y.
Morozov Gennady Y.
Novoselov Nikolai M.
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