TUNGSTEN ACTIVE GAS (TAG) WELDING OF AUSTENITIC STAINLESS STEEL SHEET WITH Ar + H2 GAS MIXTURE

33. Savetovanje sa međunarodnim učešćem Zavarivanje 2024, (p. S5.3)

AUTHOR(S) / АУТОР(И): Emina Husković, Mersida Manjgo, Ljubica Milović, Edvard Bjelajac, Gorazd Lojen, Tomaž Vuherer

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DOI: 10.46793/Zavarivanje24.S5.3H

ABSTRACT / САЖЕТАК:

TIG zavarivanje se koristi kada je potreban dobar izgled zavara i najviši kvalitet šava. Ipak, proces ima i neke velike nedostatke kao što su relativno mala dubina provara i niska produktivnost. Za povećanje dubine provara i/ili produktivnosti, umesto tradicionalno čistog Ar, mogu se koristiti gasne mešavine koje sadrže gasove visoke toplotne provodljivosti. Za austenitne nerđajuće čelike, pošto nisu skloni stvaranju vodoničnih prslina, H2 je pogodan za primenu u smeši gasova. Pošto je H2 aktivni gas, proces se naziva Volfram Aktivni Gas (TAG). U ovom istraživanju lim od austenitnog nerđajućeg čelika je zavaren brzinom zavarivanja od 40 cm min-1, sa čistim argonom i mešavinom gasova Ar+7,5 H2. Sa čistim Ar, struja zavarivanja od 220 A bila je premala da bi se dostigao pun provar na limu od 3 mm. Sa mešavinom aktivnog gasa 7,5 H2, samo 130 A je bilo dovoljno za provar uz nepromenjenu brzinu zavarivanja.

KEYWORDS / КЉУЧНЕ РЕЧИ:

TIG zavarivanje, aktivni zaštitni gas, parametri zavarivanja, geometrija zavara, mehanička svojstva

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