Volume 29 Issue 4
Aug.  2014
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ZHENG Guo-hua, SONG Xiao-long, ZHAO Yang. Study on Fatigue Strength of 2Cr11Mo1NiWVNbN Steel for Turbine Blades[J]. Development and Application of Materials, 2014, 29(4): 8-13. DOI: 10.19515/j.cnki.1003-1545.2014.04.002
Citation: ZHENG Guo-hua, SONG Xiao-long, ZHAO Yang. Study on Fatigue Strength of 2Cr11Mo1NiWVNbN Steel for Turbine Blades[J]. Development and Application of Materials, 2014, 29(4): 8-13. DOI: 10.19515/j.cnki.1003-1545.2014.04.002
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Study on Fatigue Strength of 2Cr11Mo1NiWVNbN Steel for Turbine Blades

  • 1. Luoyang Ship Material Research Institute, Luoyang 471023, China;

  • 2. Xi'an Jiaotong University, Xi'an 710049, China

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  • Received Date: March 17, 2014
  • Available Online: March 19, 2024
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    • Abstract
  • The fatigue strength of 2Cr11Mo1 NiWVNbN steel for turbine blades was measured by the staircase method, and the measurements was also calculated and verified through the empirical formulas, Basquin model and Langer model respectively.The results showed that the conditional fatigue limit of 2Cr11Mo1 NiWVNbN steel was 530 MPa at 100℃ which would be greater than that of 411 MPa calculated by the empirical formula. This was caused by dispersion strengthening of M23C6 precipitated phases and improved the hardenability of the test steel by Cr and Mo elements. The conditional fatigue limit of Langer model fitting was closer to measurements than that of Basquin model fitting, and the fatigue limit stress with different expected survivability fitted through Langer model had a smaller dispersion than that fitted through Basquin model. It was suggested that Langer model should be adopted to calculate the fatigue strength of 2Cr11Mo1 NiWVNbN steel.
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