Study on Blocky-shaped Segregation Phase of ZL205A Alloy
Author of the article:GUO Fan;XIAN Fuchao;ZHANG Haitao;JIANG Feng;WANG Shuqing;XIAO Zhua;LU He
Author's Workplace：Capital Aerospace Machinery Company,Beijing 100076,China
Key Words：ZL205A block segregation ultrasonic melt treatment microhardness aging treatment
Abstract：The effects of ultrasonic melt treatment and aging treatment on block segregation,microstructure and microhardness of ZL205A alloy castings were studied.The results show that the ultrasonic treatment of the melt could not eliminate the block segregation in ZL205A alloy and has no effect on its size and distribution,but it has a certain refinement effect on the alloy microstructure.Aging time has no effect on the size of the mass segregation phase,but it has an effect on the microhardness of the mass segregation phase.The microhardness increase first and then decrease with the increase of aging time,and the peak hardness is 165.1 HV with 4 hours of aging treatment.Homogeneous heat treatment cannot reduce or eliminate block segregation.
