For example, a mixing ratio of two different shielding gases from two sources (610, 620) of shielding gases may be modulated to affect the appearance of a deposited weld bead.
This invention relates to a method for gas metal arc welding of coated steels and a shielding gas therefor.
A shielding gas filter assembly (26) for a welding apparatus.
Shielding gas may be supplied to the welding torch for establishment of a gas shielding area around a weld pool.
A porous shielding cover (210) prevents ejecta and other materials from entering into the shielding gas flow channel.
The protective gas that is caused to flow in from the protective gas flow inlets (22Q to 25Q) is made to flow around the periphery of the discharge electrode sections (22S to 25S) and flow out into a discharge space.
According to the method, the amount of the protective gas used can be reduced.
The protective sleeve (3) is opened when said sleeve explodes due to the effect of a protective gas atmosphere contained therein.
A gas distribution device (14) is arranged, by means of which oxygen, combustion gas, and a protective gas are led to the detonation chamber (6), and which comprises gas inlet ports (16-20) for said gases.
means for conducting the inert gas to the weld
The torch comprises a metal electrode and at least one shield gas port adapted to direct a shield gas curtain around the metal electrode and a welding site.
The use of hydrogen in the protective-gas atmosphere allows such deposits to be converted to methane.
Fume gas is preferably extracted from a position radially intermediate the shield gas curtain and the shroud gas curtain.
The second portion of gas is redirected through the at least one redirect gas passageway and into the shield gas passageway.
For example, a buffer seal for receiving a buffer gas having a contaminant vapor content substantially the same as or less than a product gas produced by a pressure swing adsorption process over the adsorbers.
In embodiments the shield can be a flow of clean air or any other suitable protection gas shield.