Parametrična analiza pulznega varjenja TIG nerjavnega jekla

Markič, Nejc (author), Klobčar, Damjan (mentor), Trdan, Uroš (comentor)

Pulzno varjenje TIG omogoča zaradi pulziranja varilnega toka natančen nadzor nad vnosom toplote med varjenjem, kar je posebej primerno pri varjenju nerjavnih jekel, pri katerih se soočamo s problematiko slabe toplotne prevodnosti. Pri tem je v dosedanjih raziskavah slabo opredeljena korelacija varilnih parametrov z vnosom toplote med samim varjenjem. Cilj diplomske naloge je bil torej ugotoviti vpliv varilnih parametrov na odziv vira varilnega toka in posredno na vnos toplote pri procesu varjenja TIG, ter primerjati njihov vpliv na obliko zvara. Opravili smo eksperimentalno pulzno varjenje TIG in pri tem prilagajali frekvenco pulziranja ter jakost varilnega toka. Z meritvami jakosti varilnega toka in varilne napetosti smo primerjali odziv vira varilnega toka ter določili vnos toplote, ki smo jo primerjali s teoretičnimi vrednostmi. Prišli smo do ugotovitev, ki kažejo, da izbira varilnih parametrov bistveno vpliva na odziv vira varilnega toka ter posredno na vnos toplote in geometrijske karakteristike zvarov.

• Language: Slovenian
• Keywords: nerjavna jekla, varjenje TIG, pulzno varjenje TIG, odziv vira varilnega toka, vnos toplote, geometrijske karakteristike zvarov
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2024
• PID: 20.500.12556/RUL-160853
• Publication date in RUL: 05.09.2024

Secondary language

• Language: English
• Title: Parametric analysis of pulsed TIG welding of stainless steel

Abstract

Pulsed TIG welding allows for precise control of heat input during welding due to the pulsing of the welding current, which is especially suitable for welding stainless steels with issues of poor thermal conductivity. In previous research, the correlation between welding parameters and heat input during welding has been poorly defined. The aim of this thesis was to determine the effect of welding parameters on the response of the welding power source and indirectly on the heat input in the TIG welding process, and to compare their influence on the weld shape. We conducted experimental pulsed TIG welding, adjusting the pulse frequency and welding current intensity. By measuring the current and voltage, we compared the response of the welding power source and determined the heat input, which we compared with theoretical values. We found that the choice of welding parameters significantly affects the response of the welding power source and indirectly influences the heat input as well as geometric characteristics of the welds.

• Keywords: stainless steels, TIG welding, pulsed TIG welding, response of the welding power source, heat input, geometric characteristics of welds