Naslov
Chemical and metallographic analysis of materials used for artillery weapon barrels

Autori
Jakopčić, Mirko ; Stojković, Vjekoslav

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

Izvornik
MATRIB 2003 / Grilec, Krešimir - Zagreb : Hrvatsko društvo za materijale i tribologiju (HDMT), 2003, 79-84

Skup
8. savjetovanje o materijalima, tehnologijama, trenju i trošenju MATRIB 2003

Mjesto i datum
Vela Luka, Hrvatska, 26.06.2003. - 28.06.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
artillery weapons; barrel; chemical analysis; metallographic analysis; quenched and tempered steel

Sažetak
The paper presents the procedures and the results of the chemical and metallographic analysis of the barrel material of some artillery weapons: 76 mm field gun, 20 mm anti-aircraft gun and 120 mm mortar. The chemical analysis shows that these are quenched and tempered steels 28NiCrMo55, 32CrMo12 and 36CrNiMo4, which contain from 0.28 to 0.36% of carbon, and they are alloyed with chromium, nickel and molybdenum, i.e. chromium and molybdenum. The metallographic images of the sample cross-sections show a homogeneous structure of the tempered martensite. The measured hardness of the sample ranges from 29 to 33 HRC and is uniformly distributed across the whole cross-section of the sample. For the mentioned steels, this hardness is achieved by hardening from the temperature of about 860°C and high-temperature tempering at 600°C over a period of 2 hours

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA