With low voltage high current vacuum arc furnace

With low voltage high current vacuum arc furnace

Vacuum arc furnace in vacuum heat treatment, the workpiece (or material) can improve the worker, mould service life, no oxidation, no decarburization, surface brightness, small deformation, pollution-free, to save energy and change the mechanical properties and metallurgical properties, etc.
Electric arc furnace is using the principle of metal smelting furnace. Under the environment of vacuum arc furnace is vacuum arc furnace. Vacuum arc smelting with high current, low voltage operation, belong to the short arc. General electric arc voltage for the 22 ~ 65 v, corresponding to the arc length of 20 ~ 50 mm (the latter for big ingot). From smelting white gold experiment success since 1839, in the later one hundred years people started to research of refractory metal smelting. Vacuum arc furnace in 1953 will be officially used in industry. Until 1956, the United States and many European countries still use the self-consuming furnace melting titanium, began in 1955 with the self-consuming furnace steelmaking. Around 1960 self-consuming furnace production has reached more than 30 - ton ingot, begun to take shape. In order to improve the productivity and improve equipment utilization, two furnace share a set of main power, vacuum system and automatic control system.
With low voltage large current: in vacuum container, really a lxlo degrees with a few empty - 1 when the scope of the vacuum container under high voltage electric conductor, glow discharge is produced. In the vacuum heat treatment furnace, serious can produce arc discharge, burning electric heating element, insulation, etc., cause serious accident and loss. As a result, the working voltage of electric heating element of the vacuum heat treatment furnace, are generally not more than 80 a 100 v. In the electric heating element structure design at the same time to take effective measures, such as to avoid a sophisticated components, the spacing between the electrode cannot be too narrow, preventing the occurrence of glow discharge and arc discharge.