The breakthrough application of triple melt technology(vacuum induction melting(VIM)+ electroslag remelting(ESR)+ vacuum arc remelting(VAR))for fabricating GH4169 alloy facilitated the op-timization of the entire production process of GH4169 disks.This paper summarizes the research prog-ress on the chemical composition,triple melting,homogenization treatment,cogging,disk forging,residu-al stress control,and quality control system of GH4169 alloy.The breakthrough and large-scale applica-tion of triple melting technology have resulted in improved purity of the GH4169 alloy and reduced occur-rence probability of metallurgical defects.In addition,the microstructural uniformity and yield of forging bars have been improved by the combination of fast(upsetting and drawing)and radial forging.Further-more,deformations occurring during the machining and operation of GH4169 disks have been reduced using residual stress control technology.Results related to ultrahigh strength,ultralarge scale,high corro-sion resistance,and hydrogen embrittlement characteristics of GH4169 alloy are discussed,and potential future research directions are outlined here.
关键词
GH4169合金/三联冶炼/镦拔/径锻/残余应力
Key words
GH4169 alloy/triple melt/upsetting and drawing/radial forging/residual stress
维普
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