Strengthening of a 12CrMoV turbine blade steel by retempering |
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Authors: | R. N. Singh R. Kishore G. K. Dey I. S. Batra P. Dasgupta |
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Affiliation: | (1) Met- allurgy Division, Bhabha Atomic Research Centre, 400 085 Trombay, Bombay, India |
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Abstract: | Commercially available martensitic 12CrMo, 12CrMoV, and HCrMoVNb steels in the tempered condi-tion are often used to fabricate turbine blades. Tempering, done at the processing stage itself, is usually carried out at a temperature approximately 100 to 150 ° above the service temperature. At the service temperature, the steel undèrgoes a second tempering. The effect of this second tempering at a lower tem-perature on the strength of 12CrMoV steel is delineated and discussed in this paper. |
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Keywords: | 12CrMoV steel strengthening tempering resistance tensile properties turbine blade |
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