Resistance to cold cracking of welded joints made of P460NL1 steel

Kozak, T.

doi:10.2478/v10077-011-0014-8

Cited by 5 publications

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“…Excessive content of hydrogen in the steel welded joints causes decrease of metal plasticity and is a reason of formation of welding defects and imperfections, such as porosity and cold cracks (Pokhodnya et al, 2004;Kozak, 2011;Pańcikiewicz et al, 2013;Kurji and Coniglio, 2015). Therefore, problems connected with measurements of hydrogen content in joints have been a field of interest for many years (Padhy et al, 2015a, Kühn et al, 2013.…”

Section: Introductionmentioning

confidence: 99%

“…Results of such investigations may also be used as input data for calculations of preheating and postweld treatment temperature (Kotecki, 1994;Fydrych and Łabanowski, 2012). Taking into account the key role of hydrogen in the cold cracking formation process, practically all steel weldability investigations are carried out with simultaneous control of the diffusible hydrogen content in deposited metal (Pokhodnya et al, 2004;Kozak, 2011;Fydrych et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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An experimental study of high-hydrogen welding processes

Fydrych¹,

Łabanowski²

2015

REVMETAL

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This paper presents investigation results of determination of the diffusible hydrogen content in deposited metal obtained by means of two most often used methods-the glycerin method and the mercury method. Relation has been defined between results of those methods in the area characteristic of low-hydrogen as well as high-hydrogen welding processes. Relations available in the literature do not include the diffusible hydrogen content in deposited metal greater than 35 ml/100 g. Extending the scope of analysis of the diffusible hydrogen quantity to an 80 ml/100 g level considerably simplifies carrying out the steel weldability assessment with the use of high-hydrogen processes and with welding in water environment. RESUMEN:Estudio experimental de procesos de soldadura con alto contenido en hidrógeno. Este trabajo presenta los resultados de una investigación sobre la determinación del contenido de hidrógeno difusible en el material aportado mediante dos métodos: el de la glicerina (el más utilizado) y el del mercurio. El contenido de dicho hidrógeno se ha definido a partir de los resultados de esos métodos en una zona con bajo contenido en hidrógeno, así como procesos de soldadura con alto contenido en hidrógeno. No hay datos disponibles en la literatura para contenidos de hidrógeno difusible en metal depositado mayores de 35 ml/100 g. Ampliando el análisis de la cantidad de dicho hidrógeno hasta los 80 ml/100 g, se simplifica considerablemente la realización de ensayos de soldabilidad del acero en procesos de alto contenido en hidrógeno así como en la soldadura en medio acuoso.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An experimental study of high-hydrogen welding processes

Fydrych¹,

Łabanowski²

2015

REVMETAL

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“…Welding with basic electrodes is the low-hydrogen process: the electrode (as delivered and dried according to the manufacturer's instructions) contains less than 5 ml/100 g of diffusible hydrogen in the deposited metal [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…From a metallurgical point of view, the technology used for pipelines is more complex than the conventional technology based on one type of electrode. One important aspect in this field is controlling the hydrogen content in the joint, which is one of the reasons for the increased tendency of cold-crack formation in welded joints [12][13][14][15][16][17][18][19][20][21]. The presence of a critical amount of h ydrogen in steel weldments may determine its weldability.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of a critical amount of h ydrogen in steel weldments may determine its weldability. Such a dependence was noticed a long time ago and is still being intensively studied [12][13][14][20][21][22][23]. The diffusible hydrogen amount in welded joints varies depending on the technology, and thus on the used process, consumables, and welding parameters.…”

Section: Introductionmentioning

confidence: 99%

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Diffusible Hydrogen Content in Deposited Metal of Multilayer Welded Joints

Fydrych

Świerczyńska

2014

mafe

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Diffusible hydrogen content in the deposited metal of multilayer welded jointsZawartość wodoru dyfundującego w stopiwie wielościegowych złączy spawanych Abstract This article describes the manufacturing technology of multilayer joints in terms of controlling the diffusible hydrogen content. The diffusible hydrogen content in deposited metal for multilayer welded joints made of covered rutile electrodes or covered cellulosic and basic electrodes was determined. It was found that, after four beads, the diffusible hydrogen content decreases from 36 m l/100 g to 18 ml/100 g in the ca se of the first technology, and about 40 ml/100 g to a level of 12 ml/100 g in the second. The explanation of the mechanisms responsible for this phenomenon and direction s for further study have been proposed. Keywords: diff usible hydrogen, manual metal arc welding, rutile electrodes, cellulosic electrodes, basic electrodes Streszczenie W artykule scharakteryzowano technologię wytwarzania złączy wielościegowych w aspekcie kontroli ilości wodoru dyfundującego. Oznaczono zawartość wodoru dyfundującego w stopiwie dla wielościegowych złączy spawanych wykonanych dwoma technologiami: za pomocą elektrod o otulinie rutylowej oraz celulozowej i zasadowej. Ustalono, że po wykonaniu czterech ściegów ilość wodoru dyfundującego spada w przypadku pierwszej technologii z poziomu 36 ml/100 g do 18 ml/100 g, natomiast w drugim z około 40 ml/100 g do poziomu 12 ml/100 g. Wyjaśniono mechanizmy odpowiedzialne za to zjawisko i zasugerowano kierunki kontynuacji badań. Słowa kluczowe: wodór dyfundujący, spawanie elektrodami otulonymi, elektrody rutylowe, elektrody celulozowe, elektrody zasadowe

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Cracking of High-Strength Steel Welded Joints

Pańcikiewicz¹,

Zielińska‐Lipiec²,

Tasak³

2013

Advances in Materials Sciences

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Fracture evaluation of welded joints in high-strength steels, with bainitic and martensitic structures, is presented and cracking mechanisms discussed. Hot cracks or microcracks formed during welding are further expanded as cold cracks on cooling. The cause of cracking is shown to be low temperature of weld solidification and deformation-induced contraction. Hydrogen can also be an important factor in this cracking.

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Resistance to cold cracking of welded joints made of P460NL1 steel

Cited by 5 publications

References 0 publications

An experimental study of high-hydrogen welding processes

An experimental study of high-hydrogen welding processes

Diffusible Hydrogen Content in Deposited Metal of Multilayer Welded Joints

Cracking of High-Strength Steel Welded Joints

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