Wyniki wyszukiwania - BazTech

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Modelowanie struktury i własności mechanicznych stali mikrostopowych

Adrian Henryk, Marynowski Przemysław

Stal, Metale & Nowe Technologie

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2021

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nr 1-2

61--67

PL

Własności mechaniczne stali mikrostopowych zależą od zawartości i wielkości wydzieleń węglikoazotków, które tworzą mikrododatki takich pierwiastków jak: Ti, Nb, V, wprowadzane w ilościach nieprzekraczających 0,1%. W pracy zaprezentowano program komputerowy do obliczania zawartości i wielkości wydzieleń węglikoazotku M(C,N) oraz składu chemicznego austenitu przy danej temperaturze austenityzowania na podstawie składu chemicznego stali i warunków obróbki cieplnej. Przeprowadzono analizę wpływu składu chemicznego stali na parametry powstających w warunkach izotermicznych wydzieleń węglikoazotków M(C,N) oraz na efekt umocnienia wydzieleniowego z wykorzystaniem programu komputerowego. Zaprezentowano obrazy symulowanej mikrostruktury zawierającej wydzielenia.

EN

The mechanical properties of microalloyed steels depend on the content and size of carbonitride precipitates, which form micro-additions of such elements as Ti, Nb, and V, introduced in amounts not exceeding 0.1%. The paper presents a computer programme for calculating the content and size of M(C,N) carbonitride precipitates and the chemical composition of austenite at a given austenitizing temperature based on the chemical composition of steel and heat treatment conditions. An analysis of the influence of the chemical composition of steel on the parameters of M(C,N) carbonitride precipitates formed in isothermal conditions and on the effect of precipitation strengthening with the use of the computer programme was carried out. The images of simulated microstructure containing the precipitates are presented.

2

Badania wpływu temperatury na zdolność chłodzącą wybranych olejów hartowniczych

Adrian Henryk, Karbowniczek Mirosław, Dobosz vel Sypulski Artur, Kowalski Józef, Kozdroń Sebastian

Stal, Metale & Nowe Technologie

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2019

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nr 9-10

75--80

PL

W pracy przedstawiono wyniki analizy wpływu temperatury pomiaru na parametry zdolności chłodzącej dwóch mineralnych olejów hartowniczych: OH70 i Houghto-Quench C140 , oraz oleju roślinnego bioTemproil. Zakres temperatur pomiaru wynosił 20-100°C.

EN

The paper presents the results of the analysis of the effect of the measurement temperature on the cooling capacity parameters of two mineral quenching oils: OH70 and Houghto-Quench C140 as well as a vegetable oil bioTemproil. The measurement temperature range was 20-100°C. The test results demonstrated that the measurement temperature has a stronger effect on the cooling capacity parameters of vegetable oil as compared to mineral oils. The characteristics of the heat transfer coefficient, a, as the function of the surface temperature, Tp, for the tested oils were determined. The hardening process of a steel element was simulated using the developed characteristics α=f(Tp).

3

Cellular Automata model of carbonitrides precipitation process in steels

Marynowski Przemysław, Adrian Henryk, Głowacki Mirosław

Computer Methods in Materials Science

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2018

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Vol. 18, No. 4

122--129

EN

Cellular Automata (CA) model of carbonitride precipitation in microalloyed steels is presented in the paper. The model accounts for an increase of dislocation density due to plastic deformation and predicts kinetics of precipitation as well as stereological parameters of precipitates. Precipitation of compounds plays crucial role in controlling of properties of alloys. In low alloyed steels the microalloying elements: Ti, Nb, V are added in order to control their microstructure and mechanical properties. The most important tool in development of new processing technologies is numerical modelling. Modelling is a mathematical description of the relation between the main process variables and the resulting material properties. Many thermodynamics models were developed in the second half of the 20th century. For example the model of carbonitrides precipitation in microalloyed steels is considered works of Dutta & Sellars (1987), Dutta et al. (1991), Dutta et al. (2001). The models allow calculate kinetics of precipitation and stereological parameters of precipitates as a function of processing parameters. CA model proves to be very efficient in modelling various phenomena in materials science. The transition rules transfer the mathematical model and the knowledge regarding precipitation into the cellular automata space.