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

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Abstract
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.

Language:English
Keywords:advanced high-strength steel, laser welding, automotive industry, tensile-shear strength, hardness, heat affected zone (HAZ), microstructure
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2020
Number of pages:14 str.
Numbering:Vol. 10, iss. 4, art. 533
UDC:621.791.725+620.17(045)
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
Views:181
Downloads:55
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Record is a part of a journal

Title:Metals
Shortened title:Metals
Publisher:MDPI
ISSN:2075-4701
COBISS.SI-ID:15976214 This link opens in a new window

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P2-0270
Name:Proizvodni sistemi, laserske tehnologije in spajanje materialov

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.: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 (ARRS)
Project no.:L2-8183
Name:Visoko prilagodljivi vlakenski laserji velikih moči za uporabo v industriji

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
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

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

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