Research on Homogenization Treatment of FGH95 Alloy Ingot
Homogenization treatment of FGH95 alloy ingot was investigated by heat treatment and isothermal compression.The change of dendrite microstructure as well as composition was analyzed.The results show that FGH95 alloy ingot exists serious dendrite segregation,dendrite segregation is eliminated when microstructure and composition are homogenized after 1170 ℃×20h or isothermal compression of 70% at 1150 ℃.Homogenization by the isothermal compression of 70% at 1150 ℃ has finer microstructure than the heat treatment of 1170 ℃×20h,the average grain size is about 85.28 μm.