Selection of Materials for Components of Linear Stepper Motors for Nuclear Power Plants
A description is given of the process of selection of materials, their heat treatment sequences, and possible
surface treatments for pawls of linear stepper motors for WWER nuclear power plants. The materials selected for the
application were tested as well. The tests included measurement of hardness, impact toughness testing, metallographic
characterization and high-temperature wear testing. In surface-treated specimens, the thickness and microstructure of the
surface layer were determined. 14Ch17N2 steel proved to be the best candidate, as it showed a superior combination of
properties for the application.
Index Terms - Selection of materials, mechanical testing, microstructure