EFFECT OF TEST PARAMETERS ON ABRASION RESISTANCE OF COATINGS UNDER ABRASIVE WEAR CONDITIONS

The article deals with the determination of the influence of the speed of hard metal layers welding, with a focus on the evaluation of the abrasive wear of the layers formed by the tubular wire welding technology. The layers were wound with filled wire manufactured by ESAB under the trade name Fluxofil 58. Two different winding speeds of v=125m/min and a speed of 18m/min were used to produce the samples. Subsequently, it was necessary to determine the dependence of abrasive wear on the different abrasive hardness. The abrasives used in the experiment were SiO2 (silica) and Al2O3 (alumina, also referred to as corundum). Abrasive wear resistance was determined from the mass loss determined by weighing the prepared specimens before the test and also after traversing the 420 m and 716 m sliding paths. The specimens were prepared in accordance with ASTM G 65/16. Subsequently, an analysis of the surface degradation after wear was carried out using a Neophot 21 optical metallographic microscope. S355J0 grade steel (11 523) was used as the substrate and therefore the base material. This is a structural unalloyed steel with prescribed mechanical properties and guaranteed carbon, sulphur and phosphorus levels.