Mechanical Properties of Laser Hybrid Welded Joint of 1000 MPa Ultrahigh-Strength Steel

Yanlong, 马彦龙 Ma; Hui, 陈辉 Chen; Zhao, Xu; Chengzhu, 张成竹 Zhang; Zhiyong, 朱志勇 Zhu

doi:10.3788/cjl202148.0602113

Cited by 3 publications

(1 citation statement)

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“…To ensure the service safety of offshore equipment, not only the steel itself is required to have high strength and toughness, but the welded joints also need to have similar properties, especially toughness. Wang [11] et al studied the fracture toughness of ultra-high strength steel composite welded joints and found that the fracture toughness of the welded HAZ decreased by 40% compared with the BM. Ma [12] et al studied the mechanical properties of 1000 MPa high-strength steel laser hybrid welded joints.…”

Section: Introductionmentioning

confidence: 99%

Study on microstructure and impact toughness of laser hybrid welding joints

Han

Chen

et al. 2023

Materials Science and Technology

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In the study, laser-MIG hybrid welding of high-strength shipbuilding steel was conducted. The microstructure and impact toughness were studied. The microstructure of the Filling and capping weld metal (FCWM) is widmanstatten and acicular ferrite. The microstructure of the backing WM (BWM) and the heat-affected zone (HAZ) are bainite. The impact energy of the joints is greater than 110 J at different charpy impact test positions. The reason for the different toughness is related to the proportion and distribution of the microstructure at the V-notch of the impact specimen. Through the observation of the section, it is also found that the section corresponding to the microstructure of the different HAZ will show significant differences in fracture morphology.

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Section: Introductionmentioning

confidence: 99%