Process for high quality plasma arc cutting of stainless steel a

Details Process for high quality plasma arc cutting of stainless steel a Process for high quality plasma arc cutting of stainless steel a

1992-12-11

1995-05-09

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912144, 21912151, 21912159, 21912155, B23K 1000

Patent

active

054142369

ABSTRACT:
A plasma arc torch uses a mix of reactive and reducing gas flows to cut sheets of stainless steel, aluminum and other non-ferrous metals. The reducing gas flow to the cut is varied as a percentage of the total gas flow to maintain a reducing atmosphere down through the cut, but to leave a predominantly oxidizing atmosphere at the intersection of the cut and the bottom surface of the sheet being out. These flows can also be characterized as either a plasma gas flow, one that forms the arc, or a shield gas flow that surrounds the arc. The reactive gas is preferably a flow of air, oxygen, nitrogen, carbon dioxide or a combination of these gases. The reactive gas is usually in the plasma gas flow, whether alone or mixed with other gases. The reducing gas is preferably hydrogen, hydrogen 35, methane, or a mixture of these gases. For aluminum, the reactive gas is preferably air or nitrogen and the reducing gas is preferably methane or a mixture of methane and air.

REFERENCES:
patent: 3567898 (1971-03-01), Fein
patent: 3575568 (1971-04-01), Tateno
patent: 3619549 (1971-11-01), Hogan
patent: 4174477 (1979-11-01), Essers et al.
patent: 4410788 (1983-10-01), Summers et al.
patent: 4885455 (1989-12-01), Schultz et al.
patent: 4918283 (1990-04-01), Yamade et al.
patent: 4977305 (1990-12-01), Severance, Jr.
Poncon, V. et al., Industrial Laser Review, "The Importance of Gases in Laser Material Processing", Oct. 1992.
Whitehouse, D., The Fabricator, "Lasers in Fabricating: Achieving Maximum Productivity", Conference May 19-21, 1992, Chicago, Illinois.

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