Remote fibre laser welding of advanced high strength martensitic steel
ID Prijanovič, Urban (Author), ID Tonkovič-Prijanovič, Marica (Author), ID Trdan, Uroš (Author), ID Pleterski, Matej (Author), ID Jezeršek, Matija (Author), ID Klobčar, Damjan (Author)

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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.

Keywords:advanced high-strength steel, laser welding, automotive industry, tensile-shear strength, hardness, heat affected zone (HAZ), microstructure
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status in journal:Published
Article version:Publisher's version of article
Number of pages:14 str.
Numbering:Vol. 10, iss. 4, art. 533
PID:20.500.12556/RUL-127261 This link opens in a new window
ISSN on article:2075-4701
DOI:10.3390/met10040533 This link opens in a new window
COBISS.SI-ID:17165571 This link opens in a new window
Publication date in RUL:31.05.2021
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Shortened title:Metals
COBISS.SI-ID:15976214 This link opens in a new window


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:20.04.2020

Secondary language

Keywords:napredna visokotrdna jekla, lasersko varjenje, avtomobilska industrija, natezno-strižni test, trdota, toplotno vplivana cona, mikrostruktura


Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Project number:P2-0270
Name:Proizvodni sistemi, laserske tehnologije in spajanje materialov

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Project number:L2-8181
Name:Selektivna plazemska oksidacija zlitin FeCrAl za podaljšanje obratovalne dobe žarilnih svečk za dizelske motorje

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Project number:L2-8183
Name:Visoko prilagodljivi vlakenski laserji velikih moči za uporabo v industriji

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