Naslov
Testing and mutual comparison of abrasive resistance of directly and indirectly quenched cemented surface layers

Autori
Marušić, Vlatko ; Krumes, Dragomir ; Heffer, Goran

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, cjeloviti rad (in extenso), pregledni

Izvornik
CIM 2002 Computer Integrated Manufacturing and High Speed Machining / Cebalo, Roko ; Herbert, Schulz - Zagreb : Hrvatska udruga proizvodnog strojarstva (HUPS), 2002

Skup
8th International scientific conference on production engineering CIM 2002

Mjesto i datum
Brijuni, Hrvatska, 13.06.2002. - 14.06.2002

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
wear resistance; abrasion; cemented layers; quenched

Sažetak
The paper compares directly quenched, cemented layers with indirectly quenched layers after carbonization of Č4320 in gaseous atmosphere. The analysis of the surface hardness (HRC) and the heat tretment history (HV1) has shown there are no essential differences between analyzed layers. Testing of abrasive wear resistance of surfaces in contact with SiO2 was carried out on samples under laboratory conditions on Taber-abraser machine, and in practice on components of sunflower oil extracting screw presses. It has been established that in high-pressure conditions, directly quenched layers displayed up to 25% lower abrasive wear resistance between protective layer and the abrasive, when compared with indirectly quenched layers after carbonization. The metalographic analysis of structure showed presence of carbide Cr in the protective layer of directly quenched samples, which is most probably the reason for their high abrasive wear resistance.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA