Abstract
The article presents experimental results on the application of thermal oxidation or low temperature gas nitrocarburizing (LTGNC) of Ecosint powders sintered under industrial conditions. Surface hardness HRB and microhardness (HV0.1) were studied. A structural analysis was carried out and the corrosion resistance of the alloys was investigated. Conclusions were made on chemical heat treatment performed on structure and mechanical properties of the investigated alloys.
Highlights
Powder metallurgical parts are widely used in various industries
This paper aims at investigating the influence of lowtemperature gas nitrocarburizing (NTCNC) and thermal oxidation at different modes on corrosion behavior, surface hardness and microhardness of powders ECOsint
Microstructures of the surface layers of test bodies from ECOsint C and ECOsintHighCrA after chemical heat treatment are shown in Figs
Summary
Powder metallurgical parts are widely used in various industries. New powders are introduced to meet the requirements for minimal concentration of alloying elements. Previous research by the authors has found out that when these powders are sintered in the industrial conditions of our companies, optimal mechanical properties are not achieved due to the impossibility of meeting all the sintering cycle specifications suitable for Ecosint powders [6]. For this reason, it has been possible to combine the sintering technology with subsequent chemical heat treatment or heat treatment to improve the resulting characteristics of the sintered parts. In the field of development and application of these technologies for different types of iron-based sintered alloys, the authors have many years of Materials and experimental procedure
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