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Alternating current plasma arc powder body building up welding process
Alternating current plasma arc powder body building up welding process
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机译：交流等离子弧粉体堆焊工艺
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摘要
PURPOSE:To remove an oxide film of the base metal surface and to obtain a deposited metal with fine quality by supplying powder to the insides of a plasma arc and a pilot arc and setting an AC plasma current and a pilot current within limited ranges and melting the powder to execute cladding on the base metal surface. CONSTITUTION:An AC power source 6 for generating the plasma arc is connected between an electrode 2 in a plasma torch 1 and base metal 11. In addition, a power source 5 for generating the pilot arc is connected between the electrode 2 and a nozzle member 3a through which the plasma arc 10 is passed. The powder 9 is then supplied to the insides of the plasma arc 10 generated between the electrode 2 and the base metal 11 and the pilot arc 15 generated between the electrode 2 and the nozzle member 3a, and the power 9 is molten to execute cladding 12 on the surface of the base metal 11. At this time, the AC plasma power source 6 where current values and the time of a positive polarity component and a negative polarity component of the plasma arc 10 are made adjustable arbitrarily is ranges of 80-300A and 25-80A respectively and powder cladding by welding is performed.
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