Vacuum induction furnace smelting principle and characteristics

Vacuum induction furnace smelting principle and characteristics

Principle: the working principle of the induction furnace based on the electromagnetic induction heating principle and current. When alternating current through the induction coil, produce alternating magnetic field around the coil and furnace conductive material under the action of alternating magnetic field induced electric potential. Certain depth in the surface of furnace charge, a current (eddy current). Burden by eddy current heating melting. If furnace melting is a steel metal materials. The liquid steel in strong magnetic field caused by the effect of electromagnetic force strong movement. Magnetic field of the molten steel this effect is called electromagnetic stirring effect. The same horse coil produces A magnetic field within the crucible on two points, and B, as shown in figure 1, the power of the central due to the crucible magnetic field intensity is the largest. Crucible central pressure maximum, both ends up and down in turn reduce. The pressure of molten steel in furnace to produce movement.
Vacuum induction furnace is the induction crucible and mold release in the vacuum chamber, complete the smelting and casting in vacuum condition. Carried out under the vacuum smelting, due to the carbon and oxygen reaction products as the gas CO, the reaction to generate C0 direction, can make the carbon deoxidization ability and silicon, aluminum similar level. According to the law of gas dissolved in the liquid steel to square root, known under the vacuum smelting, is advantageous to the steel liquid to gas. For some high vapor pressure of alloy elements, such As B1, sn, Pb, As, zinc, etc., when the external pressure is reduced to less than the vapor pressure, change can be distilled from the alloy, which changes the poor performance of the steel and gold.