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
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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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