Microstructure modifications of Al-Si-coated press-hardened steel 22MnB5 by laser welding

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F24%3A00583056" target="_blank" >RIV/68081731:_____/24:00583056 - isvavai.cz</a>

Result on the web

<a href="https://www.confer.cz/metal/2023/4646-microstructure-modifications-of-al-si-coated-press-hardened-steel-22mnb5-by-laser-welding" target="_blank" >https://www.confer.cz/metal/2023/4646-microstructure-modifications-of-al-si-coated-press-hardened-steel-22mnb5-by-laser-welding</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/metal.2023.4646" target="_blank" >10.37904/metal.2023.4646</a>

Result language

angličtina

Original language name

Microstructure modifications of Al-Si-coated press-hardened steel 22MnB5 by laser welding

Original language description

Weld microstructure depends on the characteristics of welded materials and parameters of welding technology, especially on the heat input that determines the peak temperature and the cooling rate. When the coated sheets are welded, the effect of the chemical composition of the coating must be also considered even though its thickness is only a few tens of microns. During 22MnB5+AlSi laser welding experiments, the ferrite-stabilizing elements of coating modified the weld metal microstructure. Ferrite appeared in a quenched weld metal. The rapid cooling rate accompanying welding with a focused beam limited the homogenization of the weld metal which resulted in the formation of ferritic bands in the regions rich in Si and especially in Al. On the other hand, a high level of homogenization was reached when welding with the defocused beam. The ferritic islands uniformly distributed in the weld metal were formed at 0.4 wt% and 1.6 wt% of Si and Al, respectively. The doubled heat input reduced the Al content to 0.7 wt% insufficient for the ferrite formation at still relatively high cooling rates. Predicting the distribution of ferrite in the weld metal is challenging due to its dependence on various factors, such as cooling rate and the volume of dissolved coating, which may vary with any modifications made to the welding parameters.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20301 - Mechanical engineering

Project

<a href="/en/project/FW01010293" target="_blank" >FW01010293: Use of laser and hybrid technologies in energy plants</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

METAL 2023. 32nd International Conference on Metallurgy and Materials. Conference Proceedings

ISBN

978-80-88365-12-9

ISSN

2694-9296

e-ISSN

—

Number of pages

6

Pages from-to

302-307

Publisher name

TANGER

Place of publication

Ostrava

Event location

Brno

Event date

May 17, 2023

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001242776200043