Formation mechanism of δ -ferrite and metallurgy reaction in molten pool during press-hardened steel laser welding

2017 ◽  
Vol 206 ◽  
pp. 143-145 ◽  
Author(s):  
X.-N. Wang ◽  
X.-M. Chen ◽  
Q. Sun ◽  
H.-S. Di ◽  
Li-N. Sun
Keyword(s):  
Laser Welding ◽  
Formation Mechanism ◽  
Molten Pool ◽  
Hardened Steel ◽  
Δ Ferrite

scholarly journals Laser Oscillating of Nickel Alloyed Welds on Press-hardened Steel

2021 ◽  
Author(s):  
Qian Sun ◽  
Zhenghui Zhang ◽  
Xiaonan Wang ◽  
Qingyu Zhang ◽  
Zhenguang Liu
Keyword(s):  
Laser Welding ◽  
Fusion Zone ◽  
Welded Joints ◽  
Hardened Steel ◽  
Weld Width ◽  
Ni Content ◽  
Elemental Profile ◽  
Δ Ferrite ◽  
Linear Laser

Abstract Laser oscillating welding was employed to fabricate Al-Si coated press-hardened steel (PHS) to improve the element homogeneity in the fusion zone. Three oscillation amplitudes that are 0 mm, 0.5 mm and 1.3 mm were studied in this present. Ni foil of 0.06 mm thickness was used as an interlayer between two tailored PHS welded. Welds defects was absent for any oscillation amplitudes, and weld width increased with increasing oscillation amplitudes. Compared to linear laser welding, Ni and Al had an uneven elemental profile due to strong stirring force, full martensite was achieved in fusion zone. However, δ-ferrite was present with oscillation amplitudes increased to 1.3 mm, since Ni content had a sharp descent compared to Al. Tensile srtength of welded joints was not influnced by altering oscillation amplitudes.

Suppression of δ-ferrite formation on Al-Si coated press-hardened steel during laser welding

2019 ◽  
Vol 245 ◽  
pp. 106-109 ◽  
Author(s):  
Qian Sun ◽  
Hong-Shuang Di ◽  
Xiao-Nan Wang ◽  
Xia-Ming Chen
Keyword(s):  
Laser Welding ◽  
Hardened Steel ◽  
Ferrite Formation ◽  
Δ Ferrite

Influence of laser pulse on solidification of molten pool during laser welding of dissimilar Ti-based amorphous alloys

2021 ◽  
Vol 26 (3) ◽  
pp. 264-272
Author(s):  
Minghua Chen ◽  
Dongmin Wei ◽  
Chenbin Li ◽  
Liang Liu ◽  
Qi Zhou ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Laser Welding ◽  
Amorphous Alloys ◽  
Molten Pool

Experiment study and regression analysis of molten pool in laser welding

2018 ◽  
Vol 108 ◽  
pp. 534-541 ◽  
Author(s):  
Ting Lei ◽  
Youmin Rong ◽  
Jiajun Xu ◽  
Yu Huang
Keyword(s):  
Regression Analysis ◽  
Laser Welding ◽  
Molten Pool ◽  
Experiment Study

Segmentation of Molten Pool Infrared Images Using Morphology during High Power Disk Laser Welding

2012 ◽  
Vol 201-202 ◽  
pp. 91-94
Author(s):  
Yan Xi Zhang ◽  
Xiang Dong Gao
Keyword(s):  
Laser Welding ◽  
High Power ◽  
Molten Pool ◽  
Welding Process ◽  
Histogram Equalization ◽  
Welding Quality ◽  
Infrared Images ◽  
Traditional Methods ◽  
Disk Laser ◽  
Laser Welding Process

Configuration of a molten pool is related to the laser welding quality. Analyzing the configuration of a molten pool is important to monitor the laser welding process. This paper proposes a method of segmentation of a molten pool and its shadow during high power disk laser welding, consequently provides the groundwork for reconstruction of the molten pool and analysis of welding quality. Subsection linear stretching histogram equalization was applied to enhance the contrast of the original images firstly, and then edge detection was used to highlight the edges. After that we used the morphology filtering method to produce the segmentation mask, and then combined the mask with the original images to get the final segmentation results. Also, the proposed method was compared with other traditional methods. The experimental results showed that our method not only could give better segmentation results and process large quantities images automatically, but also overcame the less-segmentation problems of traditional methods.

Dynamic behavior of plasma and molten pool of pure titanium during hyperbaric laser welding

2021 ◽  
Vol 115 ◽  
pp. 103686
Author(s):  
Jian Long ◽  
Lin-Jie Zhang ◽  
Jie Ning ◽  
Suck-Joo Na
Keyword(s):  
Laser Welding ◽  
Dynamic Behavior ◽  
Molten Pool ◽  
Pure Titanium

scholarly journals Laser Welding of Coated Press-hardened Steel 22MnB5

2017 ◽  
Vol 89 ◽  
pp. 139-147 ◽  
Author(s):  
Jukka Siltanen ◽  
Ari Minkkinen ◽  
Sanna Järn
Keyword(s):  
Laser Welding ◽  
Hardened Steel
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