Microstructure and mechanical properties of ultrasonic assisted underwater wet welding joints

Sun, Qingjie; Cheng, Wangjun; Liu, Y.B.; Wang, Jianfeng; Cai, Chen-Bo; Feng, Jia

doi:10.1016/j.matdes.2016.04.019

Cited by 63 publications

(19 citation statements)

References 15 publications

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“…However, the latest investigations show that application of heating induction is possible [17]. Research tests on ultrasonic enhancement the underwater welding processes [18,22] or application of temper bead welding technique [19,24] are also carried out. The minimizing of steel susceptibility to cold cracking is especially important in case of higher strength steels.…”

Section: Introductionmentioning

confidence: 99%

Cold Cracking of S460N Steel Welded in Water Environment

Tomków

Łabanowski

Fydrych

2018

Polish Maritime Research

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This paper shows results of weldability testing of fine-grained high-strength low-alloy S460N steel welded in water environment by covered electrodes. The tests were carried out by using the CTS test specimens with fillet welds. Four specimens were welded under water and one specimen in air. Welded joints were subjected to non-destructive visual and penetration tests. The accepted joints were then subjected to macroscopic and microscopic inspection and Vickers hardness measurements as well. The experiments showed that S460N steel welded in water environment is characterized by a high susceptibility to cold cracking.

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Section: Introductionmentioning

confidence: 99%

Cold Cracking of S460N Steel Welded in Water Environment

Tomków

Łabanowski

Fydrych

2018

Polish Maritime Research

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“…Jacek Tomków, Grzegorz Rogalski Spawanie mokre elektrodami otulonymi przysparza wielu problemów związanych z jakością otrzymywanych złączy [7,8]. Środowisko spawania powoduje pogorszenie jakości złączy, które objawia się poprzez: porowatość spoin, zmiany składu chemicznego, czy skłonność do tworzenia pęknięć [9,10].…”

Section: Wstępunclassified

Badania spawalności stali S460N w środowisku wodnym z wykorzystaniem próby Tekken

Tomków

Rogalski

Łabanowski

2018

Przegląd Spawalnictwa

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“…Sun et al developed ultrasonic-assisted underwater wet welding equipment, including a welding system, an ultrasonic system, and a composite torch. By forming the ultrasonic radiation force on the bubbles during real-time welding, the ultrasonic energy can be effectively applied to improve the arc stability and enhance the mechanical properties of the joints [8]. Kong et al introduced in detail a method for measuring the fluid discharge of diffusible hydrogen in weldments.…”

Section: Introductionmentioning

confidence: 99%

Control of Droplet Transition in Underwater Welding Using Pulsating Wire Feeding

Guo

Huang

et al. 2019

Materials

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Underwater wet welding technology is widely used. Because the stability of droplet transfer in underwater wet welding is poor, the feasibility of improving the droplet transfer mode has been discussed from various technical directions. In this work, the characteristics of pulsating wire feeding were studied in the pulsating wire feeding mode by investigating the effects of changing the pulsating frequency, the wire withdrawal speed, and the wire withdrawal quantity on the droplet transfer process and the welding quality. With the aim of improving weld forming and welding stability, the authors selected the coefficient of variation and the ratio of unstable droplet transfer as the indexes to evaluate the effect of droplet transfer control. The pulsating wire feeding process of underwater wet flux-cored wire was analyzed in depth, and the following conclusions were drawn: using the pulsating wire feeding mode and after comparing and analyzing the pulsed wire feeding process under the same frequency condition, the authors found that the forming and stability were better under the conditions of slower withdrawal speed and smaller withdrawal quantity. The short-circuit transition ratio decreased steadily with the increase of pulsating wire feeding frequency, the rejection transition ratio first rose and then decreased, and the splash ratio first decreased and then rose.

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Microstructure and mechanical properties of ultrasonic assisted underwater wet welding joints

Cited by 63 publications

References 15 publications

Cold Cracking of S460N Steel Welded in Water Environment

Cold Cracking of S460N Steel Welded in Water Environment

Badania spawalności stali S460N w środowisku wodnym z wykorzystaniem próby Tekken

Control of Droplet Transition in Underwater Welding Using Pulsating Wire Feeding

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