RATIONALIZATION OF BLADING MATERIALS FOR STEAM TURBINES: THEIR REQUIREMENTS & SELECTION

In steam turbines a wide range of blading materials, which are basically modified 12% Cr martensitic steel with additions of ferrite strengthening and carbide forming alloying elements, viz. , Mo, W. V, Nb, etc. , individually or in suitable combination, have been used. The choice of blading materials is to a large extent a function of design considerations. The grades used in different stages of steam turbine of a given capacity vary between different manufacturers, as is true with the three BHEL Units in India. Rationalization of blading materials both for HP and LP stages can lead to considerable saving on their development and testing cost. With this object in mind, a detailed and comparative study has been carried out of available grades of blading materials. The interrelationships between chemical compositions, heat treatment, microstructure and their influence on long-term creep-rupture behavior have been discussed.

• Corporate Authors:

  National Metallurgical Laboratory

  P.O. Burmamines
  Jamshedpur 7,   India 
• Authors:
  • Singh, R
  • Choubey, R
  • Kumar, R
• Publication Date: 1976-11

Media Info

• Features: References;
• Pagination: p. 69-72
• Serial:
  • NML Technical Journal
  • Volume: 18
  • Issue Number: 4
  • Publisher: National Metallurgical Laboratory

Subject/Index Terms

• TRT Terms: Blades (Machinery); Design; Steam turbines
• Old TRIS Terms: Steam turbine design
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00170489
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Mar 7 1978 12:00AM