Microstructure and Mechanical Properties of X80 Pipeline Steel Backing Welded Joint by Fiber Laser-MAG Hybrid Welding

Zhenglong, 雷正龙 Lei; Caiwang, 檀财旺 Tan; Yanbin, 陈彦宾 Chen; Dejian, 刘德健 Liu; Xiyuan, 胡席远 Hu; Peipei, 胡佩佩 Hu; Huilin, 曾惠林 Zeng

doi:10.3788/cjl201340.0403002

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2023

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“…The morphology (Figure 5(a)) of the HAZ at the top of the joint is composed of FCWM, HAZ, and BM. The morphology (Figure 6(a)) of the HAZ at the bottom of the joint is composed of FCWM, BWM, HAZ, and BM [18,19]. The position of each micro-zone is also marked with letters b to f in Figures 5 and 6(a).…”

Section: Experimental Results and Analysismentioning

confidence: 99%

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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: Experimental Results and Analysismentioning

confidence: 99%

“…The distribution of microstructures inside welded joint is extremely complex, and different micro-zones have different microstructures [13][14][15]. For multi-layer the joint is composed of FCWM, BWM, HAZ, and BM [18,19]. The position of each micro-zone is also marked with letters b to f in Figures 5 and 6(a).…”

Section: In-situ Microstructure Observationmentioning

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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Microstructure and Mechanical Properties of X80 Pipeline Steel Backing Welded Joint by Fiber Laser-MAG Hybrid Welding

Cited by 1 publication

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Study on microstructure and impact toughness of laser hybrid welding joints

Study on microstructure and impact toughness of laser hybrid welding joints

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