-  Highlights 2019
-  News & Links

>  English
-  Français
-  Deutsch

-  Focus
  -  Automotive
  -  Cultural Heritage
  -  Cement works
  >  Energy production
  -  Metallurgy
  -  Mining
  -  Oil and Gas
  -  Public Management
  -  Transport
-  Training
-  Congress Management
-  Spare Parts
-  Contact / Networks

-  RCM (SAE JA 1011)
-  Dependability
-  Maintenance Welding
  -  MMA / SMAW
  -  MIG / MAG
-  Repair welding
-  Cast iron
  -  Weldability
  -  Repair Welding
-  Common steel
  -  Welding
-  Tool steels
-  Coatings
  -  Welding
  -  Spraying
  -  Brazing
-  Crane Experts
-  Safety
-  Acronym
-  International Standards
-  CEN TR 15628

-  Highlights 2019
-  Highlights 2018
-  Highlights 2017
-  Highlights 2016
-  Highlights 2015
-  Highlights 2014
-  Highlights 2013
-  Highlights 2012
-  Highlights 2011
-  Highlights 2010
-  Highlights 2009
-  Highlights 2008
-  Highlights 2007
-  Highlights 2006
-  Highlights 2005
-  Highlights 2004
-  Highlights 2003
-  Foxterrier

Energy production

Maintenance and repair welding cases

Wear-Management offers an efficient co-operation environment between your organisation and specially selected experts.
Take advantage of our experience and our data base.

Hydropower plants:

The most common steels used for hydropower components is the martensitic 13/4 CrNi steel. This steel offers good mechanical characteristics, satisfying machinability, weldability and considerable resistance against erosion and cavitation. Yet, combining all these different features is a compromise to a certain extent.

Cavitation occurs to varying degrees throughout the wide spectrum of hydraulic machine types, sizes and ages. Cavitation produces local elastic and/or plastic deformation of the surface and provokes surface tearing or surface fatigue. The length of the incubation period depends on both cavitation intensity and the material's resistance / suface finish.

Heavily worn Pelton wheel
Heavily worn Pelton wheel

Sand erosion occurs to areas subject to turbulence or changes in direction. In order to characterize the behaviour of each coating material against sand erosion, tests were performed on specimens with a special device developed at the Swiss Federal Institute of Technology of Lausanne. After the first qualification with a speed of 65 m/s and an angle of 15 degrees for many different coating materials, the HVOF (WC/Co/Cr) and Arc Spraying gave the best results. They were then used for further experimentation in varying the speed and the angle.

Actually, there is an increased need for tailor-made coatings to improve wear resistance of turbine components. A broad range of coating systems is proposed such as HVOF, Plasma, Arc spraying, Welding and Cold Polymeric Coating Systems.

Selected coatings for Francis turbines
Selected coatings for Francis turbines

Increased availability and efficiency of hydropower plants and the protection or repair of expensive components is the final objective of Wear-Management. Surface protection technologies such as HVOF or arc spraying as well as new materials for welding offer the possibility of optimized wear solutions.

Thermal power station

Thermal power station: Wear-Management as a key contributor to business profitability
Thermal power station: Wear-Management as a key contributor to business profitability

e-service - worldwide: wear-management - free documentation

As a member of the world's premier partner in maintenance and repair welding you have access to our world-wide e-service.
Join online: wear-management - free documentation.
Individual Membership Annual Dues $ 140.00 or € 100.00 or CHF 140.00
No Annual Dues for Student Membership.

Guarantee yourself the peace of mind that a quality support staff is standing by to assist you when you need them.

For further information, on-site training, technical advise or project management, please do not hesitate to contact us.

Last update: September 7, 2015

All information is supplied in good faith and without prejudice.
Wear-Management provides all information without any warranty.
Copyright © 2001-2020 Wear-Management, Arzillier 8, 1302 Vufflens-la-Ville, Switzerland
Verbatim copying and distribution of this entire document is permitted in any medium, provided this notice is preserved.