Naslov
GAS COMPOSITION INFLUENCE ON THEMICROSTRUCTURE AND GEOMETRY OF LASER-WELDED JOINTS IN DUPLEX STAINLESS STEEL

Autori
Topić, Angela ; Bauer, Branko ; Kožuh, Zoran ; Knezović, Nikola

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

Izvornik
27TH DAAAM INTERNATIONAL SYMPOSIUM ON INTELLIGENT MANUFACTURING AND AUTOMATION / - Beč, 2016, 734-742

ISBN
978-3-902734-08-2

Skup
27TH DAAAM INTERNATIONAL SYMPOSIUM ON INTELLIGENT MANUFACTURING AND AUTOMATION

Mjesto i datum
Beč, Austrija, 26.10.2016. - 29.10.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
laser ; welding ; duplex steel ; shielding gas ; weld geometry ; microstructure

Sažetak
Shielding gases, i.e., argon or an argon-nitrogen mixture, are normally used during the laser-beam welding of duplex stainless steel. Helium is also often added to the argon. The effect of the type of shielding gas – argon, nitrogen, helium and their mixtures – on the geometrical characteristics of laser-welded joints of the duplex steel W.Nr. 1.4462 was studied. The welding was carried out according to the experimental model with mixtures. The effect of the welding speed and the gas flow rate were additionally explored using a factorial experiment. Obtained data were statistically processed and mathematical modeling, applying the method of response surfaces, was carried out. The analysis revealed that the impact of the shielding gas mixtures on the geometrical characteristics of the joint is significant, while it is not so significant for the microstructure. The effect of the gas flow rate on the geometrical characteristics was registered, while the effect of the heat input is the most significant. Special cubic, quadratic and reduced quadratic models, depicting effects of the shielding gas on geometrical characteristics and microstructure of welded joint, were obtained.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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