Proceedings of the 7th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2024)

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Performance and application of direct laser welding of Al-Si coated PHS with specialized filler wire without pretreatment

Authors
Xuzhi Zhang1, Wu Tao1, Jiazhi Zhang1, Shanglu Yang2, 1, *
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai, 201800, China
2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
*Corresponding author. Email: yangshanglu_lab@126.com
Corresponding Author
Shanglu Yang
Available Online 7 December 2024.
DOI
10.2991/978-94-6463-581-2_71How to use a DOI?
Keywords
Al-Si coating; Press-hardened steel; Laser welding; Filler wire
Abstract

In the automotive industry, the Al-Si coating attached to the press-hardened steel (PHS) around the tailored edge was removed before laser tailor welding to prevent the formation of Al-rich ferrite in the weld zone (WZ), which weakened the mechanical properties. However, eliminating the Al-Si coating process entails high equipment costs and license fees. This study introduced an innovative direct laser-filler wire welding technique for Al-Si coated PHS, enabling high-quality laser welding of seven distinct Al-Si coated PHSs with varying plate thicknesses, coating thicknesses and base metal (BM) strength. Weld reinforcement was controlled within 6% to 17%. After hot stamping, the tensile strength and elongation of the welded joints were over 1500 MPa and 7%, respectively. Additionally, the average microhardness values of the WZs were comparable to that of the BM. High-speed tensile tests on the welded joints of PHS with thick or thin Al-Si coating revealed that the tensile strength exceeded 1500 MPa and failed in BM. This technology has been applied to large-scale production of automotive A-pillars, B-pillars, one-piece door rings, and other components.

Copyright
© 2024 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 7th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2024)
Series
Atlantis Highlights in Material Sciences and Technology
Publication Date
7 December 2024
ISBN
978-94-6463-581-2
ISSN
2590-3217
DOI
10.2991/978-94-6463-581-2_71How to use a DOI?
Copyright
© 2024 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Xuzhi Zhang
AU  - Wu Tao
AU  - Jiazhi Zhang
AU  - Shanglu Yang
PY  - 2024
DA  - 2024/12/07
TI  - Performance and application of direct laser welding of Al-Si coated PHS with specialized filler wire without pretreatment
BT  - Proceedings of the 7th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2024)
PB  - Atlantis Press
SP  - 591
EP  - 600
SN  - 2590-3217
UR  - https://doi.org/10.2991/978-94-6463-581-2_71
DO  - 10.2991/978-94-6463-581-2_71
ID  - Zhang2024
ER  -