发明名称 METHOD FOR MAKING CASTINGS WITH DIRECTIONAL AND MONOCRYSTALLINE STRUCTURE
摘要 manufacture of castings with directional and monocrystalline structure from nickel alloys, for example working blades and nozzle vanes of gas-turbine engines and gas-turbine plants. SUBSTANCE: method comprises steps of placing in cavity of casting mold monocrystalline hard-to-melt seed of nickel base alloy having liquidus temperature higher than that of casting alloy by 180-200 C; heating casting mold with seed until temperature lower than liquidus temperature of alloy of dummy bar by 20-100 C; pouring melt into casting mold and simultaneously moving mold from heating zone to cooling zone with maximally possible speed until seed achieves liquidus temperature; then realizing motion of mold with technologically suitable speed; interrupting pouring of melt when crystallization front achieves half of casting height. EFFECT: enhanced reliability of process, less loss of macrostructure yield due to elimination of complete melting of seed at maximum values of working temperature. 3 cl, 3 ex
申请公布号 RU2155651(C1) 申请公布日期 2000.09.10
申请号 RU19990104060 申请日期 1999.02.26
申请人 VIATSIONNYKH MATERIALOV;VIATSIONNYKH MATERIALOV 发明人 GERASIMOV V.V.;KABLOV E.N.;DEMONIS I.M.;VISIK E.M.
分类号 B22D27/04;(IPC1-7):B22D27/04 主分类号 B22D27/04
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