prikaz prve stranice dokumenta Analiza zavarljivosti Cr-Mo čelika P91
  Download
PDF 6.12 MB
master's thesis
Analiza zavarljivosti Cr-Mo čelika P91
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. urn:nbn:hr:235:474044
Širić, Petra
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

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

Cite this document

Širić, P. (2020). Analiza zavarljivosti Cr-Mo čelika P91 (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:474044

Širić, Petra. "Analiza zavarljivosti Cr-Mo čelika P91." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:474044

Širić, Petra. "Analiza zavarljivosti Cr-Mo čelika P91." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:474044

Širić, P. (2020). 'Analiza zavarljivosti Cr-Mo čelika P91', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 22 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:474044

Širić P. Analiza zavarljivosti Cr-Mo čelika P91 [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2020 [cited 2024 November 22] Available at: https://urn.nsk.hr/urn:nbn:hr:235:474044

P. Širić, "Analiza zavarljivosti Cr-Mo čelika P91", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:235:474044

Metadata
TitleAnaliza zavarljivosti Cr-Mo čelika P91
Title (english)Weldability analysis of P91 Cr-Mo steel
AuthorPetra Širić
MentorIvica Garašić (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2020-12-03, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Production Mechanical Engineering
Abstract
Opisani su čelici koji su za vrijeme rada izloženi visokim temperaturama te su navedeni specifični uvjeti rada kojima su podvrgnuti navedeni čelici. Detaljni pregled martenzitnog čelika P91 dan je u nastavku. Martenzitni čelik P91 karakterizira primjena prilikom izgradnje i reparacije energetskih postrojenja. Brojne prednosti i nedostaci prikazani su kako bi se doskočilo uspješnosti izvedbe zavarenog spoja. Pravilna primjena rezultira kvalitetnim zavarenim spojem kojim se postiže veća učinkovitost rada postrojenja i smanjenje troškova. Najčešće korišteni postupci prilikom zavarivanja čelika P91 su REL i TIG koji su detaljnije analizirani. U eksperimentalnom dijelu uzorci od čelika P91 protaljivani su TIG postupkom na način da su kombinirani parametri za svaki uzorak. Konkretno, korištena su dva zaštitna plina (100 % Ar i 85 % Ar / 15 % He), neki su uzorci predgrijavani i regulirana je jakost struje protaljivanja tako što je postignut različit unos topline kod pojedinih uzoraka. Nakon postupka protaljivanja izrađeni su makroizbrusci na kojima je provedena analiza mikrostrukture i mjerenje tvrdoće. Analizom rezultata dobivenih ispitivanjima doneseni su zaključci o zavarljivosti čelika P91.
Abstract (english)
The thesis describes steels that are exposed to high temperatures during operation. The specific operating conditions are stated to which these steels are subjected. A detailed overview of P91 martensitic steel is given below. Martensitic steel P91 is characterized by application during construction and reparation of thermal power plants. Numerous advantages and disadvantages have been shown to outperform the performance of a welded joint. Proper application results a quality welded joint which achieves greater plant efficiency and reduced costs. The most commonly used procedures for welding P91 steel are MMAW and GTAW. In the experimental part, the P91 steel samples were melted by the GTAW process in such way that the parameters for each sample were combined. In this experimental work two shielding gases (100 % Ar and 85 % Ar / 15 % He) were used and some samples were preheated. By achieving different heat inputs for individual samples, the melting current was regulated. The samples were subjected to microstructure analysis and hardness measurement after the melting process. Conclusions about the weldability of P91 steel were made by analyzing the results obtained by tests.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:474044
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-11-25 20:00:18