Mon, 25 Jun 2018 02:20:34 +0000
vacuum induction furnace of what are the advantages
Vacuum induction furnace smelting is a steelmaking method for heating, melting, refining, alloying and pouring of furnace materials under negative pressure. Compared with arc furnace and intermediate frequency induction furnace, it has the following advantages.
1. Precise control of the chemical composition of the alloy
Because the smelting process was conducted under the isolation of atmospheric vacuum, thus reducing the loss of the oxidation of the alloy elements, combined with low oxygen content in liquid steel, greatly enhance the recovery rate of alloy elements. Thus, chemical composition can be controlled accurately.
2. The smelting alloy has high purity
Because the smelting process is carried out in vacuum, the gas content in the alloy is very low. Carbon is used to deoxidize molten steel in vacuum and to avoid secondary oxidation. These superior conditions make the gas and inclusion content in the smelting steel low and greatly improve the purity of the steel.
3. Reduce the content of trace harmful impurities in steel
Trace impurities such as lead, arsenic, tin, antimony and bismuth cause obvious harm to the thermoplastic and high temperature strength of high temperature alloys. By using the characteristics of high steam pressure of trace impurity elements, high temperature and high vacuum can effectively remove impurity elements and reduce their harmful effects.
4. The process parameters of vacuum induction furnace smelting are highly adjustable
Many refining purposes can be achieved through the combination and adjustment of vacuum degree, temperature, refining time and atmosphere in the furnace. In this aspect, its process flexibility far exceeds that of induction furnace smelting. For example, the vacuum induction furnace smelting has advantages in decarbonizing, deoxidizing, denitrifying, volatile removing impurities, reducing the burning loss of easily oxidized elements and reducing the content of inclusions.