Skip to the main content

Original scientific paper

https://doi.org/10.17559/TV-20131003112325

The mechanics behind formation of secondary ledeburite during tool steel welding

Marica Prijanovič Tonkovič ; High Mechanical Engineering School, Šegova ulica 112, 8000 Novo mesto, Slovenia
Aleš Nagode ; University of Ljubljana, Faculty of Natural Sciences and Engineering, Aškerčeva cesta 12, 1000 Ljubljana, Slovenia
Borut Kosec ; University of Ljubljana, Faculty of Natural Sciences and Engineering, Aškerčeva cesta 12, 1000 Ljubljana, Slovenia
Ivan Samardžić ; J. J. Strossmayer University of Osijek, Mechanical Engineering Faculty in Slavonski Brod, Trg Ivane Brlić Mažuranić 2, 35000 Slavonski Brod, Croatia
Blaž Karpe ; University of Ljubljana, Faculty of Natural Sciences and Engineering, Aškerčeva cesta 12, 1000 Ljubljana, Slovenia
Ladislav Kosec ; University of Ljubljana, Faculty of Natural Sciences and Engineering, Aškerčeva cesta 12, 1000 Ljubljana, Slovenia


Full text: croatian pdf 3.833 Kb

page 99-104

downloads: 475

cite

Full text: english pdf 3.833 Kb

page 99-104

downloads: 699

cite


Abstract

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).

Keywords

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

Hrčak ID:

135069

URI

https://hrcak.srce.hr/135069

Publication date:

23.2.2015.

Article data in other languages: croatian

Visits: 2.481 *