Naslov
Utjecaj temperatura popuštanja na svojstva niskolegiranog čeličnog lijeva otpornog na trošenje
(The effect of tempering temperatures on the properties of low-alloyed wear resistant steel casting)

Autori
Unkić, Faruk ; Mioč, Boro ; Kivač, Zoran ; Kožuh, Stjepan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Zbornik referatov 42. livarskega posvetovanja / Tribižan, Milan - Ljubljana : Društvo livarjev Slovenije, 2002, 62-72

Skup
42. livarsko strokovno posvetovanje

Mjesto i datum
Portorož, Slovenija, 23.05.2002. - 24.05.2002

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
čelični odljevci; otpornost na trošenje; kaljenje i popuštanje; tvrdoća i zatezna čvrstoća
(steel casting; wear resistant; quenching and tempering; hardness and tensile properties)

Sažetak
The effects of tempering temperatures on microstructral and mechanical properties of in oil quenched low-alloyed Cr-Ni-Mo steel casting 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 iol 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 elogation and 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.

Izvorni jezik
Hrvatski

Znanstvena područja
Metalurgija

POVEZANOST RADA