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Boronizing is a type of thermal diffusion process with the primary goal of increasing the surface hardness, wear resistance, and prolongation of various elements' service life. The wear resistance of boronized parts depends on the type of borides that form on the surface of steel, effective boronizing depth, and the hardness of the substrate. Depending on the type of steel different iron borides form on surface layers of steel. The obtained layer may consist of mono-phase (Fe2B) or can be dual phased (FeB + Fe2B). In the case of the dual-phased layer, the FeB phase forms on the outermost surface, while the Fe2B phase forms between FeB and the base material. A layer with a single‐phase Fe2B is preferred instead of a double‐phase layer FeB/Fe2B because the Fe2B layer is less brittle than FeB. Using GDOES analysis presence of sigle Fe2B or dual Fe2B-FeB layer was observed on C45, 42CrMo4, X38CrVMo 5-3, and X90CrMoV-18 steels were observed. In addition to the type of boride layer that forms on the surface presence of alloying elements was analyzed in the boronized layer.
boronizing; GDOES; steel; Fe2B; FeB
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