Steam-turbine power plant and steam turbine

Details Steam-turbine power plant and steam turbine Steam-turbine power plant and steam turbine

F - Mech Eng,Light,Heat,Weapons

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F01D 5/28 (2006.01) B23K 35/30 (2006.01) C21D 9/38 (2006.01) F01D 3/02 (2006.01) F01K 7/00 (2006.01) B23K 35/00 (2006.01)

Patent

CA 2142924

A steam turbine in which principal components to be exposed to high temperatures are all made of ferritic steel, whereby the temperatures of main steam and reheat steam can be increased to 610 - 660 (°C). The rotor shaft (23 in Fig. 1) of the steam turbine is made of ferritic forged steel whose 100,000-hour creep rupture strength is at least 15 (kg/mm2) at the service temperature of the rotor shaft. Likewise, the casing (18) is made of ferritic cast steel whose 100,000-hour creep rupture strength is at least 10 (kg/mm2). The steam turbine of high thermal efficiency can be applied to a steam- turbine power plant.

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