Steam turbine components with differentially coated surfaces

US5683226A · kind A · utility

Inventors

• Eugene V. Clark · Quakertown, US
• Ralph J. Ortolano · Rancho Palos Verdes, US

Key dates

• Filing date: May 17, 1996
• Grant date: Nov 4, 1997
• Expiry date: May 17, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01D5/288
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Steam turbine fluid directing components are improved in erosive wear resistance by application of either relatively tougher and relatively less hard thermal spray or relatively harder and relatively less tough diffusion alloy surface modification to different portions of the component as a function of the locally greater or locally smaller angle of attack of solid particles on those portions in the use condition of the component.