Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2017 - zeszyt 2

Microstructure and selected properties of chromosiliconized and chromized layers produced on a low-carbon steel

10.15199/28.2017.2.3

Iwona Bauer

nr katalogowy: 105197
10.15199/28.2017.2.3

The paper presents the results of the microstructure and selected properties examinations of chromosiliconized and chromized layers produced on a low carbon steel. A steel of DC01 grade was designed for the research. The samples were placed in boxes with a special design, containing a pre-prepared powder mixture. The boxes were closed with lids, sealed hermetically using enamel, preventing oxidation of the load and placed in a furnace heated to processes temperature. The microstructure of the analysed layers were evaluated by light and scanning electron microscope. The thickness, surface of samples were determined. Vickers hardness tests were performed on transverse microsections. The phase composition of chromosiliconized and chromized layers was evaluated using a X-Pert diffractometer. Chemical composition was determined by glow discharge optical emission spectroscopy. Chromosiliconized and chromized samples exhibited an increase in hardness and roughness parameters in comparison to the substrate material. Stresses were measured by the sin2ψ X-ray diffraction method. The results of the study show, that chromosiliconizing and chromizing processes generate the state of the compressive internal stresses on the surface of DC01 steel. Key words: chromosiliconizing, chromizing, microstructure.1. INTRODUCTION Various branches of industry are more and more interested in technologies enabling parts of machines and devices to have good functional properties. Therefore, studies on the improvement of methods for the manufacturing of diffusion layers, i.e. gaseous, vacuum, powder, and many other methods [1÷4], are being carried out in many research centres. In the processes of the layers production, the construction of a technological station often incurs a significant financial expense. Thus, in an age of competition, technologies connected with low production costs and good functional properties of the manufactured components enjoy interest.[...]

Bibliografia

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