Microstructure and Microhardness of a Laser Additive Forming Repaired Steam Turbine Blade

  • Xiangdong Zhang
  • Tianwei Liu
  • Shugang Wang
  • Chi Jiang
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


The laser additive forming repair (LAFR) of a damaged turbine blade with pre-fabricated defects was carried out. The parameters were as follows: the laser power 800 W, the laser beam diameter 3 mm, the laser beam moving speed 6 mm/s, the 17-4PH powder feeding speed 0.4 L/min. The microstructure and the microhardness were examined along the positions from the 2Cr13 matrix to the 17-4PH LAFRed zone top. The results showed that the pre-fabricated defects were repaired successfully. Three distinguished zones can be recognized, i.e., the column grain zone, the heat affected zone (HAZ), and the 2Cr13 martensite matrix. Optical microscopy and scanning electron microscopy analysis indicated that the LAFRed zone was free of pores and contained very fine martensite variants. The microhardness test results showed that the 2Cr13 matrix possessed the minimum microhardness of about 320 HV. The microhardness profile showed an oscillation feature with the peak value of 440 HV, which is believed to be the result of microstructure modification induced by the cyclic heat input during the LAFR processing. This study confirmed that 17-4PH is a promising material for the laser additive forming repairing of the damaged 2Cr13 steam turbine blade.


Laser additive forming repairing 2Cr13 turbine blade 17-4PH Microstructure Microhardness 



This work was financially supported by the National Natural Science Foundation of China (No. 51401188).


  1. 1.
    X. Lin, Y. Cao, X. Wu, H. Yang, J. Chen, W. Huang, Microstructure and mechanical properties of laser forming repaired 17-4PH stainless steel. Mater. Sci. Eng. A 553, 80–88 (2012)CrossRefGoogle Scholar
  2. 2.
    J. Yao, L. Wang, Q. Zhang, F. Kong, C. Lou, Z. Chen, Surface laser alloying of 17-4PH stainless steel steam turbine blades. Opt. Laser Technol. 40(6), 838–843 (2008)CrossRefGoogle Scholar
  3. 3.
    J. Yao, Q. Zhang, F. Kong, Q. Ding, Laser hardening techniques on steam turbine blade and application. Phys. Procedia 5, 399–406 (2010)CrossRefGoogle Scholar
  4. 4.
    J.M. Wilson, C. Piya, Y.C. Shin, F. Zhao, K. Ramani, Remanufacturing of turbine blades by laser direct deposition with its energy and environmental impact analysis. J. Clean. Prod. 80, 170–178 (2014)CrossRefGoogle Scholar
  5. 5.
    Z. Hu, H. Zhu, H. Zhang, X. Zeng, Experimental investigation on selective laser melting of 17-4PH stainless steel. Opt. Laser Technol. 87, 17–25 (2017)CrossRefGoogle Scholar
  6. 6.
    H. Dong, M. Esfandiari, X.Y. Li, On the microstructure and phase identification of plasma nitrided 17-4PH precipitation hardening stainless steel. Surf. Coat. Technol. 202(13), 2969–2975 (2008)CrossRefGoogle Scholar
  7. 7.
    Z. Wang, W. Luan, J. Huang, C. Jiang, XRD investigation of microstructure strengthening mechanism of shot peening on laser hardened 17-4PH. Mater. Sci. Eng. A 528(21), 6417–6425 (2011)CrossRefGoogle Scholar
  8. 8.
    J. Wang, H. Zou, C. Li, R. Zuo, S. Qiu, B. Shen, Relationship of microstructure transformation and hardening behavior of type 17-4 PH stainless steel. J. Univ. Sci. Technol. Beijing Miner. Metall. Mater. 13(3), 235–239 (2006)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Xiangdong Zhang
    • 1
  • Tianwei Liu
    • 1
  • Shugang Wang
    • 1
  • Chi Jiang
    • 1
  1. 1.Institute of MaterialsChina Academy of Engineering PhysicsJiangyouChina

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