In this work the fundamental principles are outlined, by which carbide free bainitic microstructures with high notched impact toughness, can be obtained. The theoretical analysis is supported by experimental results of 5 test alloys. Traditionally it is considered that retained austenite in the microstructure acts favorably by increasing the impact toughness, however it is argued that this only hold true for low hardness conditions within highly alloyed steel grades whereas in lean alloyed steel the stress/strain induced transformation of retained austenite shall be suppressed in order to avoid the apparent notch sensitivity caused by this reaction.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 21022742The making of high strength steel welds with carbide free lower bainite microstructures with low retained austenite content, enables the obtainment of high impact toughness within the weld and HAZ, especially at low temperatures. The welds are evaluated in the as-welded condition and after applying a regeneration heat treatment, it is observed that after regeneration the properties of the weld approach those of the base material.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 20953110A new type of carbide free bainitic steel with rapid bainite formation at low temperatures is presented. The steel exhibits a high work hardness and hardenability enabling the obtainment of homogeneous properties within thick sections. This is achieved due to the very fine microstructure formed despite the low alloying content.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 20550934The welding of high carbon baintic steels using single pass welding is presented whereby the welding parameters for the making of V-shaped single pass A-Tig weld are iteratively optimized in order to obtain a weld microstructure with finely dispersed retained austenite regions within the interdendritic regions.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 20550166Within the project the technologie of 3D printing of polymer bonded magnets was developed. The 3D printing of polymer bonded magnets is based od fused deposition method. The new production method FDM enables manufacturing of polymer bonded magnets with the properties appropriate for industrial needs. The results of this research work encourage further investigation into the development of the technology of 3D printing of polymer bonded magnets on the industrial scale.
F.06 Development of a new product
COBISS.SI-ID: 20867606