MICROSTRUCTURE AND PHASE COMPOSITION OF SOLIDIFIED Ni-BASE SUPERALLOY POWDER
HU Benfu;LI Huiying;WU Chengjian;ZHANG Shouhua University of Science and Technology Beijing
Cite this article:
HU Benfu;LI Huiying;WU Chengjian;ZHANG Shouhua University of Science and Technology Beijing. MICROSTRUCTURE AND PHASE COMPOSITION OF SOLIDIFIED Ni-BASE SUPERALLOY POWDER. Acta Metall Sin, 1990, 26(5): 22-27.
Abstract The microstructure and phase composition of FGH95 Ni-base super-alloy powder of different mesh size solidified from chemical deposition of prealloy-ed Ni have been investigated. The microstructure transition was found from dendrite inmajor into cellular precipitate as the reduction of powder size and the increase ofcooling rate. The principal phase was identified as different morphologies of MC-type carbides, which may be related to their composition and the condition of solid-ification. Minor phases, such as Laves, primary γ' and boride are also present,and they exist as associated with carbides.
1 Tien J K, Boesch W J, Howson T E, Castledine W B. P/M Superalloy Technology and Applications, 1980 International Powder Metallurgy Conference, 22--27 June 1980, Washington, preprint 2 胡本芙,李慧英,章守华.金属学报,1987;23:B95 3 Smugeresky J F. Metall Trans, 1982; 13A: 1535 4 黄乾尧.钢铁,1981;16:41 5 Fernandez R, Lecomte T C, Kattamis T Z. Metall Trans, 1978; 9A: 1381 6 李慧英,胡本芙,章守华.金属学报,1987;23:B91 7 Ingesten N G, Warren R, Winberg L. In: Brunetaud R, Coutsouradis D, Gibbons T B, Lindblom Y, Meadowcroft D B, Stickler R eds.. High Temperature Alloys for Gas Turbines, 1982, Proc of a Conf, Held in Liege, Belgium, 4--6 October, 1982, Dordrecht, Holl and: D Reidel, 1982: 1013 8 Dahlen M, Fischmeister H. In: Tien J K, Wlodek S T, Morrow H III, Gell M, Maurer G eds., Superalloys 1980, Proc 4th Int Symposium on Superalloys, 21--25 September 1980, Champion, Pennsylvania, Metals Park, Ohio: ASM, 1980: 44
