Lasersko navarjanje nitriranega orodnega jekla

zaključna naloga Razvojno raziskovalnega programa I. stopnje Strojništvo

Rok Lenaršič (Author), Damjan Klobčar (Mentor)

Abstract

Diplomska naloga obravnava poroznost lasersko izdelanih navarov na površinah nitriranih orodij. Naloga zajema pregled literature na teme laserskega varjenja in navarjanja ter odpravljanja poroznosti pri navarjanju nitriranih površin. Izdelan je načrt eksperimentov laserskega navarjanja ob uporabi dodajnih materialov z različno vsebnostjo titana, ki naj bi preprečeval nastanek poroznosti. Na vzorcih so bili izdelani obrusi in na njih narejena optična mikroskopija, mikroskopija SEM in analiza kemične sestave. Ugotovili smo, da na količino poroznosti vpliva globina pretalitve osnovnega materiala in količina titana v dodajnem materialu. Poroznost v zvaru smo zmanjšali pod 1 % celotne površine zvara s 5,87 % titana v dodajni žici. Rezultati kažejo, da lahko ob primerni izbiri parametrov in tehniki varjenja podobne rezultate dosežemo že z več kot 0,6 % titana v dodajnem materialu.

Keywords

diplomske naloge;lasersko navarjanje;titan;orodno jeklo;nitracija;poroznost;

Data

Language:	Slovenian
Year of publishing:	2020
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[R. Lenaršič]
UDC:	621.791.725:669.14:669.295(043.2)
COBISS:	28342275
Views:	316
Downloads:	71
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Laser weld surfacing of nitrided tool steel
Secondary abstract:	The bachelor thesis deals with the porosity of laser surfacing welds on surfaces of nitrided tools. The thesis includes the survey of literature on the subject of laser welding, weld surfacing, and eliminating porosity in the weld surfacing of nitrided surfaces. A plan of experiments in weld surfacing is made, demonstrating how the use of filler materials containing various amounts of titanium, should prevent porosity. Macro etch specimens were prepared, and an optic microscopy, as well as SEM microscopy, and analysis of chemical structure were performed upon them. We found out that the amount of porosity is influenced by the melt depth of the base material and the amount of titanium in the filler material. The porosity in the weld was reduced under 1% of the whole surface of the weld, with 5,87% of titanium in the filler wire. Results demonstrate that with an adequate choice of parameters and an adequate technique of welding, similar results can be achieved with more than 0.6% of titanium in the filler material.
Secondary keywords:	thesis;laser weld surfacing;titanium;tool steel;nitridation;porosity;
Type (COBISS):	Final paper
Study programme:	0
Thesis comment:	Univ. v Ljubljani, Fak. za strojništvo
Pages:	XIV, 29 f.
ID:	12029509