| 摘要 |
A manufacturing method of turbine interstage seals is provided to manufacture interstage seals for turbines in which residual stress is not remained, and which are less deformed by high temperatures and high pressures by manufacturing seal bodies and seal packings through the centrifugal casting process without employing the forging process. A manufacturing method of a turbine interstage seal comprises: a step(S100) of heating and melting metal; a step(S101) of preheating a mold; a step(S102) of rotating the mold to a predetermined rotary speed and injecting molten metal into the mold to form a seal body or seal packing; a step(S103) of cooling the mold and seal body or seal packing; and a step(S104) of separating the seal body or seal packing from the mold. The melting step is performed by heating a metal in which iron, carbon, manganese, phosphorous, silicon, chromium, and molybdenum are alloyed to a temperature of 1630 to 1670 deg.C to melt the metal. The manufacturing method further comprises a step(S105) of heat-treating the seal body or seal packing after the separation step.
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