Cold Cracking of S460N Steel Welded in Water Environment

Tomków, Jacek; Łabanowski, Jerzy; Fydrych, Dariusz

doi:10.2478/pomr-2018-0104

Cited by 28 publications

(31 citation statements)

References 25 publications

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“…HSLA S460N steel is characterized by high susceptibility to cold cracking in wet welding conditions [31]. Research has been taken to check the suitability of the use of the temper bead welding technique to improve the weldability of this steel.…”

Section: Discussionmentioning

confidence: 99%

“…The HSLA S460N steel was selected for the research, because it is used in offshore structures. The investigated steel is characterized by high susceptibility to cold cracking in wet welding by covered electrodes [31], so it is necessary to look for solutions to improve its welding conditions weldability in water environment. For studies S460N plates of 12 mm thickness was chosen.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…Information of the S460N steel weldability in the published literature is limited and, based on its chemical composition and structure, the steel should be treated as a material with poor weldability. Typical welding procedures for this steel in the air require pre-heating to a temperature dependent on the thickness of the elements and the type of joint (thermal severity) [31,32].…”

Section: Introductionmentioning

confidence: 99%

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Temper Bead Welding of S460N Steel in Wet Welding Conditions

Tomków

Fydrych

Łabanowski

2018

Advances in Materials Science

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Wet welding is the most common method of welding in water environment. It is most often used for repairing of underwater parts of offshore structures. However, the water as a welding environment causes an increase of susceptibility of steels to cold cracking. For underwater constructions high strength low alloy (HSLA) steel are widely used. In wet welding condition a HSLA steel is characterized by high susceptibility to cold cracking. Temper Bead Welding (TBW) was chosen as a method to improve the weldability of S460N steel. The studies showed that TBW technique causes significant decrease of maximum hardness of heat affected zone (HAZ). The largest decrease in hardness occurred in specimens with the pitches in range 66-100%.

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Section: Discussionmentioning

confidence: 99%

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Temper Bead Welding of S460N Steel in Wet Welding Conditions

Tomków

Fydrych

Łabanowski

2018

Advances in Materials Science

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“…Visual tests were carried out 72 hours after the end of the welding process so as to ensure adequate time for the appearance of potential cold cracks, since both tested steels are characterized by high susceptibility to cold cracking [23,24].…”

Section: Visual Testingmentioning

confidence: 99%

The influence of welding heat input on the quality and properties of high strength low-alloy dissimilar steel butt joints

Tomków

Haras

2020

Weld. Tech. Rev.

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The paper presents the results of non-destructive and destructive tests od dissimilar high-strength low-alloy S460ML and S460N butt joints. These steels are characterized by similar mechanical properties, but their carbon equivalent CeIIW is much different. The joints were made using different values of heat input for each welding bead. They were tested by non-destructive methods: visual, penetrant, radiographic and ultrasonic tests. Then, the destructive tests were made: static tensile test, bending test, impact test and Vickers HV10 hardness measurements. The results of prepared examinations showed, that welding with higher heat input has significant impact on the mechanical properties of the dissimilar steel joints – the joint welded with bigger heat input was characterized by better mechanical properties.

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“…The water is a source of potential hydrogen and diffusible hydrogen content in deposited metal depends on this amount. Hydrogen could be a source of corrosion (Świerczyńska et al, 2017a), and it is also a factor that is responsible for cracking (Yadav et al, 2017;Pascual-Guillamón et al, 2018), especially cold cracking, which is the biggest problem in underwater welding (Guo et al, 2015;Tomków et al, 2018b). Also, the hydrogen has a big influence on the mechanical properties of welded joints (Pandey et al, 2017a;Pandey et al, 2017b).…”

Section: Introductionmentioning

confidence: 99%

Efecto del sistema de apantallamiento de la soldadura y el tiempo de almacenaje de los electrodos en el contenido de hidrógeno difundido en el metal depositado

et al. 2019

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In the study the glycerin displacement method was used for determination of diffusible hydrogen content in deposited metal. Specimens were welded in the air and in the water with covered rutile electrodes. The first part of the specimens was made immediately after opening the package of the electrodes. The electrodes were then stored in opened packages in laboratory conditions that allowed for contact with the air for three years. After that time, the second part of the samples was made. The results of the measurements of the diffusible hydrogen amount in deposited metal ranged from 32.61 to 39.95 ml/100 g for specimens welded in the air and from 51.50 to 61.34 ml/100 g for specimens made in the water. The statistical analyses were performed in a Statistical software package using the ANOVA module (one-way analysis of variance) with an assumed significance level α = 0.05. The assumption of normality was verified by the Shapiro-Wilk test. The homogeneity of variance was verified by the Levene test. In the next step, post-hoc analyzes were made. The aim was to determine which averages are significantly different. Scheffe, Tukey, NIR Fisher, Newman-Keuls and Duncan tests were used. Possible changes in the diffusible hydrogen content in deposited metal resulting from storage time of electrodes (3 years) were verified by Student's t-test. All of the statistical analysis shows that the storage time of the electrodes has no significant influence on the diffusible hydrogen content in deposited metal regardless of the welding environment.Citation/Citar como: Tomków, J., Fydrych, D., Rogalski, G., Łabanowski, J. (2019). "Effect of the welding environment and storage time of electrodes on the diffusible hydrogen content in deposited metal". Rev. Metal. 55(1): e140. https:// doi.org/10.3989/revmetalm.140

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Cold Cracking of S460N Steel Welded in Water Environment

Cited by 28 publications

References 25 publications

Temper Bead Welding of S460N Steel in Wet Welding Conditions

Temper Bead Welding of S460N Steel in Wet Welding Conditions

The influence of welding heat input on the quality and properties of high strength low-alloy dissimilar steel butt joints

Efecto del sistema de apantallamiento de la soldadura y el tiempo de almacenaje de los electrodos en el contenido de hidrógeno difundido en el metal depositado

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