Research on Solidified Structure Controlling of Iron-nickel Based Corrosion-resistant Alloy

The UNS N08825 ingots were produced through traditional ESR technology,drawing ESR technology with bifilar mode,and drawing ESR technology with single electrode and current-conductive mode at different melting rates. The crystal structures and hot workability of ESR ingots were analyzed. The differences in melting rates,cooling conditions and temperature fields were studied for the three techniques. The results indicate that UNS N08825 alloy ESR ingot possesses good thermo plasticity if the angle θ between the formation direction of the columnar grain and longitudinal direction is no greater than 54°.