Pregled bibliografske jedinice broj: 87050
Ustanovljenje parametara toplinske obrade odljevaka od legiranog čeličnog lijeva otpornog na trošenje
Ustanovljenje parametara toplinske obrade odljevaka od legiranog čeličnog lijeva otpornog na trošenje // Proceedings Book 4th International Foundrymen Conference: Recent Development in the Castings Production / Unkić, Faruk ; Zovko Brodarac, Zdenka (ur.).
Sisak: Metalurški fakultet Sveučilišta u Zagrebu, 2002. str. 60-71 (predavanje, nije recenziran, cjeloviti rad (in extenso), znanstveni)
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Naslov
Ustanovljenje parametara toplinske obrade odljevaka od legiranog čeličnog lijeva otpornog na trošenje
(Determination of heat treatment parameters of wear resistant alloyed steel castings)
Autori
Unkić, Faruk ; Kivač, Zoran
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Proceedings Book 4th International Foundrymen Conference: Recent Development in the Castings Production
/ Unkić, Faruk ; Zovko Brodarac, Zdenka - Sisak : Metalurški fakultet Sveučilišta u Zagrebu, 2002, 60-71
Skup
Proceedings Book 4th International Foundrymen Conference: Recent Development in the Castings Production
Mjesto i datum
Sisak, Hrvatska, 10.10.2002. - 11.10.2002
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Nije recenziran
Ključne riječi
odljevci; Cr-Ni-Mo čelik; toplinska obrada; vlačna svojstva
(castings; Cr-Ni-Mo steel; heat treatment; tensile properties)
Sažetak
The effects of tempering temperatures on microstructural and mechanical properties of in oil quenched low-alloyed Cr-Ni-Mo cast steel intended for wear resistant tool have been studied. In as-quenched condition an inhomogeneous martenzite microstructure with about 10 % retained austenite was achieved, which have had average tensile strength 1442 MPa and hardness 53 HRc. Tempering of oil quenched steel samples was performed in 400 to 700 °C temperature interval. Heat induced martenzite destabilization and carbide precipitations resulted by linear decrease tensile strength from 1600 to 800 MPa and yield strength from 1400 to 600 MPa, as well as by instantaneous increase of elongation end contraction from 5 to 20 % and 10 to 50 % respectively. Microstructural changes with increasing of tempering temperatures were also followed by average decrease of hardness from 45 to 22 HRc as well as simultaneously, gradually increase of toughness from 10 to 70 J. The obtained results made possible to define optimal heat treating parameters and to achieve good combination of tougness and hardness in real wear resistant castings.
Izvorni jezik
Hrvatski
Znanstvena područja
Metalurgija
