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Ph.D., D.Sc. Michał Tacikowski
Faculty of Materials Science and Engineering
Budynek Laboratorium Obróbki Ciepnej przy Gmachu NT, ul Narbutta 85 Warszawa, pok. Nr 3.4, konsultacje, czwartek 15-16
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# Research Area Dziedzina naukowa

The subject of the implementation type doctoral thesis is located in the area of vacuum carburization of steel with the application of local activation. Low pressure vacuum carburizing is increasingly used in industry. It allows increasing the process temperature, reducing the processing time and controlling the amount of carbides produced. However the problem is the treatment of components with complex geometries in areas that are hard to reach by the atmosphere, such as deep holes or the bottom of gear wheel notches. At these locations the carburized layer is thinner and uneven, which causes a lack of appropriate strength and exploitation problems. Our preliminary studies prove the possibility of obtaining local activation of the carburization process and as a result a more uniform carburized layer thickness. The aim of the doctoral thesis will be to develop the basics of local carburization activation technology and its implementation on a dedicated modern industrial vacuum furnace.

Materials Engineering

The subject of the doctoral thesis is located in the area of surface engineering of high-strength nanobainitic steels. The aim of the thesis will be to identify the possibility of controlling the structure and properties of steel in hybrid processes using high-temperature surface diffusion treatments and advanced heat treatments in order to produce a layer of hard compounds with a gradient zone in the substrate on steel with a carbide-free nanobainite structure. Diffusion treatments often result in a change in the chemical composition adjacent to the layer. This effect, as shown by our own studies, can be used to control the microstructure of subsurface zones of the substrate based on advanced heat treatment, in order to obtain a gradient change in hardness between the relatively hard layer and the nanobainitic steel core. Achieving the thesis aim will require specific competencies in the theory and practice of nanobainitization of steel and the in the basics of surface engineering

Materials Engineering