The making of new alloys with plasma melting furnace

Two Fe–Al–Mn alloys with different aluminium and manganese contents were melted in a 90 kW, self–designed, non–consumable plasma torch furnace. Nitrogen was then injected through a bottom porous plug into the molten bath. The solidified ingots were subjected to proper homogenisation and hot forging. It found that the Fe–5Al–11Mn alloy exhibits the highest nitrogen content of 1230 ppm while the elongation as high as 42.2% with level of 804 MPa has been obtained.