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Vloga površinske napetosti taline pri varjenju A-TIG in vpliv na trdnostne lastnosti zvarnega spoja = [Role of the weld-pool surface tension in the A-TIG welding process and its influence on mechanical properties of the welded joint] : doktorsko delo
Tomc, Janko
V delu so podane raziskave A-TIG varjenja nerjavnega avstenitnega jekla tipa X5CrNi18-10. Zaradi velikega vpliva temperaturne odvisnosti površinske napetosti taline se smer toka v talini zvara obrne ...od toka navzven v tok navznoter varilne kopeli in to pri enakih varilnih parametrih, kar povzroči precejšnje povečanje globine uvara H. Temperaturno odvisnost površinske napetosti pa spremenijo določeni kemijski elementi, ki smo jih v obliki dodatka osnovnemu materialu vnesli v talino zvara. Uporabili smo elemente žveplo (S), selen (Se), antimon (Sb) ter telur (Te). Najboljše rezultate je dal telur, kjer smo dosegli celo do 260% povečanje uvara. Izvedli smo tudi mehanizirano A-TIG varjenje s telurjem in prav tako dobili velike spremembe v globini uvara, kar je pomembno pri praktični uporabi tega načina varjenja, ki bi lahko nadomestilo uporovno točkovno varjenje debelejših pločevin iz nerjavnih avstenitnih jekel.
Type of material - dissertation
Publication and manufacture - Ljubljana : [J. Tomc], 2004
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