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Abstract
Wear-resistant protective zones, restricted to pre-set areas on the rotor blades of turbines and made from heat-treatable steels alloyed with chrome, can be produced efficiently by electron beam (EB) hardening. The EB plant of type ESA 150-MR is suitable for carrying out hardening processes on small numbers of blades in combination with a component-specific positioning device.
The method and instruments described here were used to make a fairly large number of turbine blades fit for use again by reconstruction after destruction by erosion.