Rationalization of the blading material for steam turbines: Their requirements and selection

Singh, Raghubir and Choubey, R and Kumar, R (1976) Rationalization of the blading material for steam turbines: Their requirements and selection. NML Technical Journal, 18 (4). pp. 69-72.

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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 inter-relationships between chemical compositions, heat treatment, microstructure and their influence on long-term creep-rupture behaviour have been discussed in the light of the desired properties from design view points and service conditions. (Shri R. Singh, Shri R. Choubey and Dr. R. Kumar, Scientists, National Metallurgical Laboratory)

Item Type:Article
Official URL/DOI:http://library/articleDetails.jsp?recordid=348
Uncontrolled Keywords:Cr martensitic steels; Blading materials; Steam turbine; Creep-rupture behaviour
Divisions:Material Science and Technology
ID Code:2190
Deposited By:Dr. A K Sahu
Deposited On:27 Dec 2010 12:28
Last Modified:19 Mar 2012 11:59
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