Experimental Design of the emery-paper-method

The abrasive wear of heavy plates is mainly influenced by size and hardness of the penetrating abrasive particle (abrasive material). Formerly abrasio n-tests are dealing with the one-factor-at-a-time-method. This method allow s to investigate the influence either of the hardness or the size of abrasi ve material upon the wearing surface. Mutual dependence (interactions) betw een this factors could not be discovered. So the one-factor-at-a-time-metho d allows to find only suboptimum conditions. In this publication the Statis tical Design of Experiments is used far the first time in the field of abra sion-test, because this method allows to analyze interactions between hardn ess and size of the abrasive particle.