Creation of wear resistant boride layers on selected steel grades in electric arc remelting process

Abstract

This article deals with possibilities of an application of controlled diffusion processes in remelting of steel surface layers with an electric arc of non-consumable electrode, in the environment enriched by boron, with the aim to achieve an improved wear resistance. In the design of experiment, there was formulated an assumption that the dissociation and ionisation of environment can be achieved, allowing the initiation of diffusion processes in the surface layer of the steel remelted. Conditions for creation of hard and stable structures with required properties should be obtained by enrichment of surface layers. The steel grades 16MnCr5 and X8CrNiTi1810 were used in experiments. Values of hardness and relative abrasive wear resistance were measured on samples after remelting. The metallographic analysis of remelted samples was performed as well. A significant increase in values of studied parameters was observed when remelting in the boron containing environment. The dependence applies to the effect of the environment on the change of properties and boron content in the remelting environment.

Creating Wear-Resistant Layers on 41CrAlMo7 Steel Using Tig Surface Remelting

“…By remelting the examined steel in the presence of Durborit G powder, a dendritic microstructure was created (Fig. 8), which was formed by fine lamellar pearlite inside dendrites and a network formed by iron carboborides in the interdendritic spaces (Kováč et al, 2014;Falat et al, 2019). This microstructure is visible in the SEM details of microstructure (Fig.…”

“…The work builds on previous research by the authors, in which the method of surface remelting of steels by electric arc in the presence of nitrogen or boron was applied (Kováč et al, 2014;Kováč et al, 2022).…”

Microstructure and Abrasive Wear Resistance of Various Alloy Hardfacings for Application on Heavy-Duty Chipper Tools in Forestry Shredding and Mulching Operations

“…Cemented carbides, or hardmetals, are widely used for extremely demanding applications due to their hardness and strength, fracture toughness, and excellent wear resistance [4]. Another possible measures that may be taken into consideration, are the following: the whole tool quenching-and-tempering treatment, its surface carburizing, surface hardening, superficial alloying by laser or electric arc remelting, and hard surfacing [5,6,7,8,9,10,11,12,13]. According to current in-service experience, premature failures of chipper tools still remain a pertinent issue in forestry which may be a consequence of the fact that degradation behavior of forestry tools has not been up to now so widely investigated, compared to other heavy-duty tools employed in, e.g., agriculture, road building, and the mining industry [14].…”