Naslov
Mehanika pri formiranju sekundarnog ledeburita tijekom zavarivanja alatnog čelika
(The mechanics behind formation of secondary ledeburite during tool steel welding)

Autori
Prijanovič Tonkovič, Marica ; Nagode, Aleš ; Kosec, Borut ; Samardžić, Ivan ; Karpe, Blaž ; Kosec, Ladislav

Izvornik
Tehnički vjesnik : znanstveno-stručni časopis tehničkih fakulteta Sveučilišta u Osijeku (1330-3651) 22 (2015), 1; 99-104

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, original scientific paper, znanstveni

Ključne riječi
carbides dissolution ; crystallization ; heat affected zone (HAZ) ; secondary ledeburite ; submerged arc welding ; weld

Sažetak
In this article we describe the microstructural changes in the heat affected zone (HAZ) of the tool steel W. Nr. 1.2379, which was surfaced or welded by the submerged arc welding technique (SAW) with different welding parameters. Microstructure of the welds and of the surfacing welds was analysed by optical and scanning electron microscope. In this research, we particularly studied microstructural changes in the area of primary chromium carbides in the HAZ and their effect on the weld crystalization. We came to the conclusion that the temperature in the HAZ is high enough during the welding process that it caused primary carbides to dissolve and concentration of the carbide-forming elements and carbon increased in the surrounding austenite matrix area to eutectic composition, which remelts and solidified as secondary eutectic (ledeburite).

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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