20.500.12556/RUL-127261 Remote fibre laser welding of advanced high strength martensitic steel The study presents the results of remote robotic laser welding of advanced high strength Docol$^®$ 1200 M martensitic steel. One mm thick samples were welded in a lap joint configuration using a special clamping system. Welding was done using a continuous-wave (CW) fibre laser with a constant welding power of 300 W and constant focus diameter Ø 1.8 mm. Welding was done using 12 different welding speeds in the range from 0.15 to 1 m/min, whereas the inclination angle was kept constant at 0°. The influence of various welding speeds and linear heat inputs during welding on microstructural changes were examined by the occurrence of acicular and allotriomorphic ferrite or martensite. Results revealed big influence of the clamping system on the accumulation of the laser beam energy, heat sink and consequently weld size and geometry, as well as its microstructure and joint strength. Tensile-shear strength, microstructure and hardness results confirmed laser power of 300 W and 0.6 m/min welding speed as the optimal parameters, at which a martensitic structure was obtained in the weld. The width of the heat affected zone (HAZ) in this case is 1100 µm. advanced high-strength steel laser welding automotive industry tensile-shear strength hardness heat affected zone (HAZ) microstructure napredna visokotrdna jekla lasersko varjenje avtomobilska industrija natezno-strižni test trdota toplotno vplivana cona mikrostruktura true false true Angleški jezik Slovenski jezik Članek v reviji 2021-05-31 13:57:08 2021-05-31 13:57:10 2022-09-06 03:50:24 0000-00-00 00:00:00 2020 0 0 14 str. iss. 4, art. 533 Vol. 10 Apr. 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.791.725+620.17(045) 2075-4701 10.3390/met10040533 17165571 RAZ_Prijanovic_Urban_2020.pdf RAZ_Prijanovic_Urban_2020.pdf 1 09F6A329DD78C68FF32FCA248FB8A7E1 77ea3ff77316dee3c69f2ea097278874c781c01271f59f87c51bf3b44a2db941 86526553-4c6a-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=151360 https://www.mdpi.com/2075-4701/10/4/533 1 43062a7d-c207-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=143571 Fakulteta za strojništvo 0 0 0