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undergraduate thesis
Određivanje kritičnog unosa topline za primjenu korijenske zaštite kod TIG zavarivanja Cr-Ni čelika
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. urn:nbn:hr:235:958972
Bauer, Bruno
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Bauer, B. (2021). Određivanje kritičnog unosa topline za primjenu korijenske zaštite kod TIG zavarivanja Cr-Ni čelika (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:958972

Bauer, Bruno. "Određivanje kritičnog unosa topline za primjenu korijenske zaštite kod TIG zavarivanja Cr-Ni čelika." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:958972

Bauer, Bruno. "Određivanje kritičnog unosa topline za primjenu korijenske zaštite kod TIG zavarivanja Cr-Ni čelika." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:958972

Bauer, B. (2021). 'Određivanje kritičnog unosa topline za primjenu korijenske zaštite kod TIG zavarivanja Cr-Ni čelika', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 17 June 2024, https://urn.nsk.hr/urn:nbn:hr:235:958972

Bauer B. Određivanje kritičnog unosa topline za primjenu korijenske zaštite kod TIG zavarivanja Cr-Ni čelika [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2021 [cited 2024 June 17] Available at: https://urn.nsk.hr/urn:nbn:hr:235:958972

B. Bauer, "Određivanje kritičnog unosa topline za primjenu korijenske zaštite kod TIG zavarivanja Cr-Ni čelika", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:235:958972

Metadata
TitleOdređivanje kritičnog unosa topline za primjenu korijenske zaštite kod TIG zavarivanja Cr-Ni čelika
Title (english)Determination of critical heat input for application of back shielding at TIG welding of Cr-Ni steel
AuthorBruno Bauer
MentorIvica Garašić (mentor)
Committee memberIvica Garašić (predsjednik povjerenstva)
Committee memberTomislav Staroveški (član povjerenstva)
Committee memberVinko Šimunović (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2021-02-25, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U ovom je radu obrađena problematika TIG zavarivanja nehrđajućih čelika bez korijenske zaštite. Svrha rada je odrediti iznos unesene topline za koji nije potrebna korijenska zaštita. Rad se sastoji od dva dijela teorijskog i praktičnog. U teorijskom dijelu opisan je TIG postupak s posebnim naglaskom na tehnologiju zavarivanja visokolegiranih austenitnih Cr-Ni čelika, opremu potrebnu za uspješnu primjenu i parametre zavarivanja. Opisan je značaj korijenske zaštite i zaštitni plinovi koji se koriste za korijensku zaštitu. Proučavani su zahtjevi norme HRN EN ISO 15614-1 koji definiraju primjenu korijenske zaštite. U eksperimentalnom dijelu provedeno je automatizirano TIG navarivanje uzoraka izrezanih iz cijevi od nehrđajućeg čelika AISI 304 s različitim unosima topline. TIG navarivanje izvodilo se bez primjene korijenske zaštite. Nakon vizualne kontrole izrađeni su makroizbrusci na kojima se vidi poprečni presjek navara. Proučavane su geometrijske značajke i obojenja površine materijala s korijenske strane za pojedine razine unosa topline. Povećanje unosa topline utjecalo je na povećanje geometrijskih značajki navara. Kod najmanjeg unosa topline pojavilo se obojenje površine materijala s korijenske strane što ukazuje na potrebu za korijenskom zaštitom iako je debljina podloge bila veća od 5 mm za koju prema normi HRN EN ISO 15614-1 nije potrebna korijenska zaštita.
Abstract (english)
This paper deals with the problem of TIG welding on stainless steels without root protection. The purpose of this work is to determine the amount of heat input for which no root protection is required. The paper consists of two parts, theoretical and practical. The theoretical part describes the TIG process with special emphasis on the welding technology of high-alloyed austenitic Cr-Ni steels, the equipment required for successful application and the welding parameters. The significance of root protection and shielding gases used for root protection are described. The requirements of the HRN EN ISO 15614-1 standard defining the application of root protection have been studied. In the experimental part, automated TIG bead on plate welding of AISI 304 stainless steel tube with different heat inputs was performed. TIG welding was performed without the application of root protection. After visual inspection, macrographs were made on which the cross-section of the weld can be seen. The geometrical characteristics of the weld crosssection and heat tints on the root side of the material were studied for different heat input levels. The increase in heat input affected the increase in the geometrical characteristics of the welds. At the lowest heat input, heat tints on the root side surface of the material appeared, which indicates the need for root protection, although the thickness of the material backing support was greater than 5 mm, for which root protection is not required according to HRN EN ISO 15614-1.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:958972
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2021-02-25 16:36:04