Selected Properties of Hardfacing Layers Created by PTA Technology

The paper presents research results on the quality of hardfacing layers made during renovation unheated mold surfaces designed for injection aluminum alloys using plasma transferred arc (PTA) technology. As material, medium alloy steel X38CrMoV5-1 (H11) was used. For formation functional layers, three types additives in form powder were applied: two an iron basis with designation HSS 23 and 30 one type a nickel DEW Nibasit 625-P. 120 × 350 50 mm plate machine PPC 250 R6. evaluated by means nondestructive destructive tests. surface integrity assessed visual capillary samples passed these impact parameters used mixing metal base as well structure analysis, light electron microscopy (SEM). chemical composition elements determined energy-dispersive X-ray spectroscopy (EDX) analysis SEM microscope. hardness individual evaluated. Since, operation, molds are subjected to significant wear due friction, friction coefficients selected temperatures equipment evaluation tribology properties. Based experiments conducted, all can be renovation. However, from perspective, additive 625-P is recommended