Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Coating – specific composition or characteristic
Patent
1991-12-04
1994-11-22
Denion, Thomas E.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Coating, specific composition or characteristic
416223R, 416229A, 416241B, 427554, 4272552, B63H 126
Patent
active
053663454
ABSTRACT:
A turbine blade, preferably used in the low pressure stages of a steam turbine, is formed from a basic titanium alloy. Near the blade tip, it has a region, including the blade leading edge with a surface of a material which is more resistant to erosion than the basic titanium alloy.
This turbine blade should be simple to manufacture and should have a long life even under difficult operating conditions.
This is achieved in that the region including the blade leading edge has a protective layer formed by surface treatment of the basic titanium alloy by means of a high-power energy source, such as, in particular, a laser.
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Patent Absracts of Japan, vol. 11, No. 397, Dec. 25, 1987, "Turbine Blade", Toshiba Corp. (JP-A-62 165 510).
Patent Abstracts of Japan, vol. 12, No. 28, Jan. 27, 1988, "Low Pressure Turbine Moving Vane for Steam Turbine", Hitachi Ltd. (JP-A-62 180 026).
Gerdes Claus
Maggi Carlo
Asea Brown Boveri Ltd.
Denion Thomas E.
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