Electroslag Refining Processing of iron-aluminium Based Intermetallic Alloys

A process route comprising air induction melting (AIM) and electroslag remelting (ESR) for Production of Fe₃Al based containing Cr alloys has been developed. The effect of melting practice on the purity of elements,inclusions and properties is reported. Proper selection and control of Power input during electroslag remelting resulted in clean, sound,homogenous and defect-free ingots. The content of S,O, H,P in the samples were decreased, and the size and distribution of inclusion were changed. After hot forging and thermomechanical process, the longitudinal elongation at room temperature is over 8% and 10% for two kinds of materials, yield strength is over 400 MPa, and ultimate tensile Strength is about 700 MPa. It is more possible to melt Fe₃Al based alloys by ESR.