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Evaluation of welding characteristics for manual overlay and laser cladding materials in gas turbine blades

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Abstract

A Ni-based super-alloy is widely used in manufacturing the first stage blade of high power land-based gas turbines as these first stage blades operate under high temperature and high pressure. The blade of a gas turbine must withstand the most severe combination of temperature, stress, and environment. After continued operation, the blade may be damaged by the turbine operation mode. To recover its initial mechanical properties, the blade of the Ni-based super-alloy undergoes a replacement repair process. Typical repair processes include blending, welding, re-machining and precision grinding. In this paper, the effects of manual overlay and laser cladding were investigated as part of the welding characteristic evaluation. Results are compared with those for post-heat treatment known as hot isostatic processing (HIP).

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Authors and Affiliations

  1. Center for Composite Materials, University of Delaware, Delaware, USA

    Hyung-Ick Kim

  2. KEPCO E&C, Seoul, Korea

    Hong-Sun Park

  3. School of Mechanical Engineering, Sungkyunkwan University, Kyunggi-do, Korea

    Jae-Mean Koo & Chang-Sung Seok

  4. Gas Turbine Technology Service Center, Korea Plant Service & Engineering, Seoul, Korea

    Sung-Ho Yang & Moon-Young Kim

Authors
  1. Hyung-Ick Kim
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  2. Hong-Sun Park
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  3. Jae-Mean Koo
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  4. Chang-Sung Seok
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  5. Sung-Ho Yang
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  6. Moon-Young Kim
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Corresponding author

Correspondence to Jae-Mean Koo.

Additional information

Recommended by Guest Editor Dong-Ho Bae

Chang-Sung Seok received his B.S., M.S., and Ph.D in Mechanical Engineering from Sungkyunkwan University, Korea in 1981, 1983 and 1990, respectively. Prof. Seok is currently a Professor of the School of Mechanical Engineering of Sungkyunkwan University, Korea. His research fields are the integrity evaluation and durability design of machine structures, development of component parts and analysis of stress and strength.

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Kim, HI., Park, HS., Koo, JM. et al. Evaluation of welding characteristics for manual overlay and laser cladding materials in gas turbine blades. J Mech Sci Technol 26, 2015–2018 (2012). https://doi.org/10.1007/s12206-012-0505-5

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  • DOI: https://doi.org/10.1007/s12206-012-0505-5

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