Plasmatron with Oxide Cathode

Author: Viktor Lazorkin, Ph.D.
Company: TECHNONOVA Co., Ltd.
Contact info:

Novitskogo, 10, k.2  

69035, Zaporozhye, UKRAINE  

Web site: www.technonova.nm.ru  
e-mail: technonova@nm.ru

Plasmatron developed by our engineers is a perfectly new plasma device fit out with a special oxide cathode to incorporate such features as high performance characteristics and simplicity of design.

The device uses nonconsumable electrodes capable of preventing the pinch effect by scattering electrons in plasma of arc discharge. Prevention of the pinch effect is possible due to minimal rate of movement of electrons in plasma of arc discharge and, correspondingly, minimal magnetic interactions between electrons. This results in formation of wide anode spot (not a thin beam of electrons) on the surface being heated (up to 40 mm in diameter at current of 250-750 A).

Distribution of thermal energy of anode spot on big surface area enables:

• welding of electrographite materials with metals (copper, aluminum, steel) in air to make welded heavy-current contacts for electrometallurgical units, particularly, contacts for electrolytic baths intended for aluminum smelting;
• weld deposition of wear-resistant and high-temperature alloys onto parts of stamping and forging equipment subject to thermal and mechanical loads;
• working edges of welds of butt and angle joints allowing to obtain a graded junction between the weld and base material that results in increase of bearing capacity of steel construction by 60 %, etc.

The plasmatron is very simple in design and does not need any special installation that makes it highly reliable, easy and convenient in use.

Information supplied by the Author May 2001.  Page last updated: January 19, 2004