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Mathematical modelling of hardness of quenched and tempered steel


Smoljan, Božo; Iljkić, Dario; Tomašić, Neven
Mathematical modelling of hardness of quenched and tempered steel // Proceedings of the 22th Winter International Scientific Conference on "Achievements in Mechanical and Materials Engineering" Winter- AMME`2015
Gliwice-Zakopane, Poljska, 2015. (plenarno, međunarodna recenzija, sažetak, znanstveni)


Naslov
Mathematical modelling of hardness of quenched and tempered steel

Autori
Smoljan, Božo ; Iljkić, Dario ; Tomašić, Neven

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings of the 22th Winter International Scientific Conference on "Achievements in Mechanical and Materials Engineering" Winter- AMME`2015 / - , 2015

Skup
22th Winter International Scientific Conference on "Achievements in Mechanical and Materials Engineering" Winter-AMME`2015

Mjesto i datum
Gliwice-Zakopane, Poljska, 06-09.12.2015.

Vrsta sudjelovanja
Plenarno

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Steel; Quenching and Tempering; Hardness; Computer Simulation

Sažetak
Purpose: In this paper a new mathematical model and expressions for prediction of hardness of quenched and tempered steel was established. Design/methodology/approach: Novel mathematical expression for prediction of hardness of quenched and tempered steel was established. This expression includes tempering temperature, hardenability properties and degree of hardening. By experimental work it was found out that results of quenching and tempering are related to hardenability properties of steel. Findings: Based on experimental work it was found out that prediction of hardness of quenched and tempered steel is more precise by novel mathematical expression than by relation according to the German standard DIN 17021, or than by relation established by Just, E. Research limitations/implications: By taking into account the hardenability properties of steels, influence of diffusivity on kinetic of tempering processes is indirectly taken into account in the mathematical modeling of tempering processes without using the chemical composition of steel. Practical implications: The established relations were applied in mathematical modeling and computer simulation of quenching and tempering of shaft made of low alloyed steel. It was found out that hardness of quenched and tempered steel workpieces can be successfully calculated by the proposed method. Originality/value Hardenability properties of steel are included in the established relation to achieve more precise prediction of quenched and tempered steel hardness. The influence of diffusivity on kinetic of tempering processes is indirectly taken into account in the mathematical modeling of tempering processes without using the chemical composition of steel. Keywords: Steel ; Quenching and Tempering ; Hardness ; Computer Simulation

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Temeljne tehničke znanosti



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2013-11-5371 - Optimiranje i modeliranje termalnih procesa materijala (Božo Smoljan, )

Ustanove
Tehnički fakultet, Rijeka