Abstract
The scientific research, presented in this paper, deals with numerical modelling of the quenching process of conventional carbon steels. The developed numerical model simulates the quenching process of the hypereutectoid steels whose microstructure contains complex carbides. Those include the high-alloyed hyper-eutectoid steels intended for example for bearings, or high speed steel products. The calculation software SYSWELD, based on the finite element method, was used. The results of numerical modelling were compared with actual properties of quenched samples made of the hyper-eutectoid bearing steel. The microstructure was studied and hardness was measured in order to verify the numerical model's accuracy. The presented results indicate the absence of carbidic phase in the simulation calculations. This implies relatively large deviations in the simulated hardness results compared toh reality. Those deviations must be considered in the case of simulating the microstructure and hardness of bearing steels using the SYSWELD software.
Highlights
The possibility of modelling the quenching process brings an advantage in predicting the phase transformations in steel and its related microstructure, hardness and grain size
The software designed to model steels contains a database of such steels' material properties, in the actual modelling, they are based on the assumption that these steels, similar to conventional carbon steels, are formed of homogenous austenite prior to the immersion in the quenching medium
This paper analyzed the possibility of modelling the thermal-metallurgical parameters of steels forming the carbidic phase in the microstructure
Summary
The possibility of modelling the quenching process brings an advantage in predicting the phase transformations in steel and its related microstructure, hardness and grain size. The software designed to model steels contains a database of such steels' material properties, in the actual modelling, they are based on the assumption that these steels, similar to conventional carbon steels, are formed of homogenous austenite prior to the immersion in the quenching medium. This issue is the most pronounced in the form of a comparison between the modelled Vickers hardness and the achieved hardness
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