Reasons for using vacuum induction furnace to smelt alloy materials?
Vacuum induction furnace manufacturer introduces that vacuum induction melting (VIM) is a method of stopping melting by using electromagnetic induction to produce eddy current heating furnace charge in metal conductor under vacuum condition. It has small volume of melting chamber, short vacuum time and melting cycle, and is convenient for temperature and pressure control, recoverable volatile elements and accurate control of alloys. Composition and other characteristics. Because of the above characteristics, it has been developed as one of the important processes for consumption of special alloys such as special steels, fine alloys, electrothermal alloys, superalloys and corrosion resistant alloys.
Vacuum induction melting is an important method of electric furnace melting besides electric arc furnace. Its characteristics are:
(1) Electromagnetic induction heating. Because of different heating methods, the induction furnace does not have graphite electrodes necessary for arc heating, thus eliminating the possibility of carbon enrichment of the electrodes, so it can melt steels and alloys with very low carbon content which are difficult to melt in the arc furnace.
(2) There is a certain intensity of electromagnetic stirring in the molten pool, which can promote the average composition and temperature of molten steel, and the inclusions merge, grow and float in the steel.
(3) The molten pool is smaller than the surface area. The advantages are that it is easy to control the atmosphere in the smelting process, no arc and high temperature zone under arc, less burning loss of alloying elements and less gas absorption, so it is beneficial to composition control, low gas content and shorten the smelting time. The defects are small interface area of slag steel, and the slag can not be heated by induction, low slag temperature, poor activity and low reaction force. It is not conducive to stop the metallurgical reaction of slag steel interface, especially desulfurization and dephosphorization, so the request for raw data is more stringent.
(4) less smoke and dust and less environmental pollution. There is no flame or extinguishing product in the melting process.