Roller Pressing or Shot Peening of Fir-Tree Root of LPT Blades of 500 MW Steam Turbine
- Prof. Dr.-Ing Lothar Wagner Chairman of ICSP8
Published Online: 7 FEB 2006
DOI: 10.1002/3527606580.ch63
Copyright © 2003 Wiley-VCH Verlag GmbH & Co. KGaA
Book Title
Shot Peening
Additional Information
How to Cite
Sharma, M. C. (2006) Roller Pressing or Shot Peening of Fir-Tree Root of LPT Blades of 500 MW Steam Turbine, in Shot Peening (ed L. Wagner), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606580.ch63
Editor Information
TU Clausthal, Institut für Werkstoffkunde und Werkstofftechnik, Agricolastr. 6, D-38678 Clausthal-Zellerfeld, Germany
Publication History
- Published Online: 7 FEB 2006
- Published Print: 12 MAY 2003
ISBN Information
Print ISBN: 9783527305377
Online ISBN: 9783527606580
- Summary
- Chapter
Keywords:
- roller pressing;
- shot peening
Summary
In the present investigation surface roughness and residual stress data obtained with different peening parameters were reported. It was observed that pressure peening with 10 mm convergent divergent nozzle, 1 to 1.2 mm cast steel shots, at 0.32 A peening intensity, 3 kg/cm2 tank pressure 12” stand off, 125 to 150 % coverage gave residual stress value −418 MPa at 0.25 mm depth in 12 % chrome steel test pieces. The surface roughness too was with in required range (Ra = 2.80 µm). Residual stress on an actual blade profile cut section was also verified. Thus roll pressing can be replaced by shot peening.