Research on new technology of laser forging coupled arc welding of E690 marine steel
ISSN: 1355-2546
Article publication date: 2 May 2023
Issue publication date: 3 July 2023
Abstract
Purpose
The purpose of this study is to reduce the cracks, pores and unfused defects in arc welding, improve the crystalline structure of the weld, refine its grains and improve the mechanical properties.
Design/methodology/approach
Taking E690 marine steel as the research object, the experiment adopts a new process method of laser forging coupled arc welding. Welding for comparative experiments. Experiments show that the “V”-shaped groove arc welding process has a larger fusion area, but has pores, the arc current is 168 A, the arc voltage is 28 V and the welding speed is 600 mm/min.
Findings
It can be seen from tensile tests that the coupling welding process has the highest tensile strength and yield strength, 872 MPa and 692 MPa, respectively, and the fracture elongation is 29.29%. The single-beam laser forging coupled arc welding process has a distance of laser and wire of 6–8 mm, a laser wavelength of 1,064 nm and the highest weld fusion ratio. The microhardness test shows that the average hardness of single-beam laser forging in the weld zone is 487.54 HV, which is 10.30% higher than that of arc welding. The average hardness in the fusion zone is 788.08 HV, which is 14.52% higher than that of the arc welding process.
Originality/value
The originality of the experiment: proposed a new process method of coupling arc repair for offshore steel forging; adopted a new process method of simultaneous coupling of single-beam short-pulse laser, double-beam short-pulse laser and arc welding; and obtained effect of pulsed laser and arc composite repair on porosity and fusion of E690 marine steel welds.
Keywords
Acknowledgements
Declaration of Competing Interest: We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.
Data Availability Statements: The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.
This work was financially supported by Special fund project for Development of the low stress and long life on-site laser forging assisted additive repair technology and intelligent equipment (GDNRC[2023]28); The scientific and technological innovation strategy of Guangdong Province, Research on Differential Laser Angular Shock Reinforcement Process for Complex Profile of Aeroengine Turbine Disk Tenon Groove (pdjh2023b0172); The Natural Science Foundation of Guangdong Province, China (2021A1515012133).
Citation
Cai, W., Zhang, Y. and Liu, J. (2023), "Research on new technology of laser forging coupled arc welding of E690 marine steel", Rapid Prototyping Journal, Vol. 29 No. 7, pp. 1523-1535. https://doi.org/10.1108/RPJ-10-2022-0345
Publisher
:Emerald Publishing Limited
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