Stainless steel type 13Cr5Ni having high toughness, and usage of

Details Stainless steel type 13Cr5Ni having high toughness, and usage of Stainless steel type 13Cr5Ni having high toughness, and usage of

1996-11-14

1999-03-09

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

415200, F04D 2938

Patent

active

058791329

ABSTRACT:
An ultra high head pumpturbine power generating plant with a turbine having a runner rotating with water flow supplied through a high head conducting tube. A rotary electric machine rotates with rotation of the runner. The head is in the range of 400-600 m, and the runner is at least 5 meters in diameter. The said runner has characteristics of toughness at room temperature: at least 500 N/mm.sup.2, or tensile strength at room temperature: at least 650 N/mm.sup.2, elongation at least 16%, reduction of area at least 45%, 2 mm U-notch impact value at 0.degree. C. at least 100 J, and fracture toughness at least 6000 N/mm.sup.3/2.

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