A Chart Method to Determine Necessary Preheat Temperature in Steel Welding.

Yurioka, Nobutaka; Kasuya, Tadashi

doi:10.2207/qjjws.13.347

Cited by 52 publications

(33 citation statements)

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“…Thus, carbon equivalent formulas have been developed to provide a quantitative value representative of the weldment composition [11,12]. This value has in turn served as a proxy to cracking susceptibility.…”

Section: Carbon Equivalentmentioning

confidence: 99%

“…Yurioka and Kasuya [12] proposed a chart method to determine the necessary preheat temperature to avoid cracking in steel weld metals. This method is based upon master curves experimentally obtained for each set of welding conditions.…”

Section: Effect Of Welding Parametersmentioning

confidence: 99%

“…In WIC and gapped beadon-plate tests, the cooling time to 100°C (t 100,min in s) depends on the carbon equivalent CEN value and the Fig. 11 Maps used in Yurioka's chart method for evaluating critical preheat temperature to avoid cracking for welding practice-a carbon equivalent (CEN) value correction as a function of weld metal hydrogen content, b CEN value correction as a function of welding heat input and carbon equivalent (CE IIW ) value, c critical preheat temperature for laboratory y-groove restraint testing as a function of plate thickness and CEN value at indicated test conditions, and d critical preheat temperature correction from laboratory test to welding practice as a function of steel yield strength [12] Fig . 12 Percentage of cracking as a function of preheat temperature for E9010 weld metal using WIC test [24] t 100;min ¼ 34:…”

Section: Effect Of Preheatmentioning

confidence: 99%

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Towards the establishment of weldability test standards for hydrogen-assisted cold cracking

Kurji

Coniglio

2014

Int J Adv Manuf Technol

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Our depth of understanding on these points has matured significantly over time and, while there is not always universal agreement, it is at least possible to start highlighting factors important to standards. This paper examines these factors, including the welding parameters, restraint, hydrogen, and cracking index. When comparing different alloys having different thermal characteristics, the use of constant welding parameters (common practice) will result in variable weld penetration and weld pool shape, which can influence grain shape and microstructural features, which can result in inequitable weldability comparisons. Welding on test coupons having different dimensions can affect restraint, which will influence the residual stresses around the weldment. High restraint usually results in higher crack susceptibility. Also, hydrogen content present in a weldment depends on the thermal history, welding parameters, and surrounding atmosphere humidity, with high hydrogen contents associated to great cracking susceptibility. Finally, the selection of an appropriate cracking index is required for data analysis. Quantifications of crack length and minimum preheat temperature are common indexes used for comparison. Critical stress and hydrogen content are other indexes. But how well these indexes actually represent weldability are contentious issues. This paper will examine and quantify these issues in detail, thus providing the reader with an appreciation of all things that must be considered when preparing a standardized procedure for weldability testing.

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Section: Carbon Equivalentmentioning

confidence: 99%

Section: Effect Of Welding Parametersmentioning

confidence: 99%

Section: Effect Of Preheatmentioning

confidence: 99%

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Towards the establishment of weldability test standards for hydrogen-assisted cold cracking

Kurji

Coniglio

2014

Int J Adv Manuf Technol

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“…In all cases, Ni is multiplied by a coefficient smaller than other common alloying elements such as Cr, Mo, Si, V, and Mn (Bryhan, 1981;Grong & Matlock, 1986;Lancaster, 1997;Yurioka, Suzuki, Ohshita, & Saito, 1983). Thus, nickel additions carry a lower penalty in terms of weldability.…”

Section: Effect Of Nickel On Weldabilitymentioning

confidence: 99%

Sulfide stress cracking of nickel-containing low-alloy steels

et al. 2014

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Low-alloy steels (LAS) are extensively used in oil and gas (O&G) production due to their good mechanical properties and low cost. Even though nickel improves mechanical properties and hardenability with low penalty on weldability, which is critical for large subsea components, nickel content cannot exceed 1-wt% when used in sour service applications. The ISO 15156-2 standard limits the nickel content in LAS on the assumption that nickel concentrations above 1-wt% negatively impact sulfide stress cracking (SSC) resistance. This restriction excludes a significant number of high-strength and high-toughness alloys, such as Ni-Cr-Mo (e.g., UNS G43200 and G43400), Ni-Mo (e.g., UNS G46200), and Ni-Cr-Mo-V grades, from sour service applications and can be used only if successfully qualified. However, the standard is based on controversial research conducted more than 40 years ago. Since then, researchers have suggested that it is the microstructure that determines SSC resistance, regardless of Ni content. This review summarizes the advantages and disadvantages of nickel-containing LAS in terms of strength, weldability, hardenability, potential weight savings, and cost reduction. Likewise, the state of knowledge on the effect of nickel on hydrogen absorption as well as SSC initiation and propagation kinetics is critically reviewed.

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“…Finalmente, el material identificado como Ti-Nb, presenta contenidos de C y Mn similares a la chapa Nb, pero con mayor contenido de Si, y el agregado Ti como microaleante. Para cada chapa se evaluó el carbono equivalente desarrollado por Yurioka, CEn, y el parámetro de composición del material, Pcm, desarrollado por Ito [15], los cuales aplican a estos aceros por ser de relativo bajo carbono (< 0,1%). Los máximos valores de CEn y Pcm corresponden a los materiales Nb y Ti-Nb.…”

Section: Aceros Dp Obtenidosunclassified

Soldadura de aceros dual phase en chapa fina: GMAW, PAW y RSW

2011

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ResumenLos aceros Dual Phase (DP) han encontrado recientemente una fuerte aplicación en elementos estructurales en la industria automotriz, debido a la necesidad de disminuir peso. La soldadura de estos materiales cobra particular importancia considerando su aplicación estructural y los procesos relacionados en su fabricación. En particular la soldadura de resistencia por punto (RSW) y semiautomática con alambre macizo y protección gaseosa (GMAW) RSW, GMAW and PAW. In Palabras clave: aceros Dual Phase, PAW, GMAW, RSW, ZAC Abstract: Dual Phase steels (DP) have been used recently as an interesting option for structural elements, specialy in automotive industry, due to weight reduce requirements. Welding of these materials becomes particularly important considering their application as structural elements and the related manufacturing methods. In particular resistance spot welding (RSW) and gas metal arc welding (GMAW) are widely used in the automotive manufacturing. The plasma arc welding (PAW) has the charateristic, within arc welding processes, to involve the highest energy density, being this parameter interesting to certain applications on automative industry (tailor welded blanks). The objective of this work is to study the microstructural evolution and properties of welded DP steels by mean of

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A Chart Method to Determine Necessary Preheat Temperature in Steel Welding.

Cited by 52 publications

References 0 publications

Towards the establishment of weldability test standards for hydrogen-assisted cold cracking

Towards the establishment of weldability test standards for hydrogen-assisted cold cracking

Sulfide stress cracking of nickel-containing low-alloy steels

Soldadura de aceros dual phase en chapa fina: GMAW, PAW y RSW

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