Properties of Hyperbaric Flux Cored Arc Welds: Weld Metal Chemistry

Santos, Jorge F. dos; Szelagowski, P.; Schafstall, H G

doi:10.4043/5893-ms

Cited by 5 publications

(5 citation statements)

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“…The SEM micrographs clearly show the randomly oriented ferrite needle crystals formed as a woven mesh which increases the resistance of the weld metal to brittle fracture. In the austenitic grains along the acicular ferrite (AF) boundaries present are spherical nonmetallic inclusions from the rutile coating, which served as nuclei of intragranular nucleation of needle like ferrite [11][12][13].…”

Section: Test Resultsmentioning

confidence: 99%

Exploring Possibilities of Implementation of Special Rutile Electrodes for Welding Microalloyed Steels

Mrdak¹,

Bajić

Rakin³

et al. 2016

AMR

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The paper presents test results of a new quality of a special rutile electrode, with a core of flux-cored wire made from local raw materials, based on analyzing mechanical properties and microstructure of the weld metal in MMA welding. The base metal for experimental welding was microalloyed steel marked J55 (thickness 7.0 mm) according to API Spec 5L standards (EN 10113-3. and JUS C.B0 502) which was produced in Smederevo steelworks. For experimental welding a special electrode IHIS E 35 R-2 was used, with a medium thickness rutile coating, a core of flux-cored wire and Ni content of 2.5%. The results of the analyzes indicate that the new quality special rutile electrode with the flux-cored wire core provides good structural and mechanical properties of weld metal in microalloyed steel welded joints.

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Section: Test Resultsmentioning

confidence: 99%

Exploring Possibilities of Implementation of Special Rutile Electrodes for Welding Microalloyed Steels

Mrdak¹,

Bajić

Rakin³

et al. 2016

AMR

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“…Usually, the use of a certain flux is necessary to control the oxygen content of the weld deposit in relation to aluminium (Al) content of the BM (dilution). 35,76 As proposed by Peng et al, 65 the chemical compositions of wire for the SAW of higher strength pipeline steel are designed according to the following requirements:…”

Section: Weld Metalmentioning

confidence: 99%

Challenges and developments in pipeline weldability and mechanical properties

Liu

Bhole

2013

Science and Technology of Welding and Joining

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Recent economic and political events have further highlighted the need for new and strategically accessible sources of oil and gas. With the continually increasing demand for oil and gas, the requirement for pipeline steels with higher strength, toughness and weldability has been one of the most important factors driving the development of high strength pipeline steels, particularly with the oil exploration proceeding into arctic and deep sea regions, enhancing the weldability and mechanical properties of the new pipeline steels and weld consumables. Developments in the welding processes for manufacture and field welding are described in terms of process principles, equipment, consumables, weld quality, process economics and further developments. The increasing and changing requirement for weldability and mechanical properties in the heat affected zone and weld metal of pipeline welds are presented along with the reported solutions to the problems.

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“…Although a high-pressure fully-gassy space is created, the welding process and its characters in the high-pressure condition may be totally different than in the normal pressure environment, especially for the geometry of the arc and electrical characteristics which have considerable influence in determining the welding parameters, for example, arc length and current [6][7][8][9]. Researchers around the world have already done some experiments to study the welding process in high-pressure condition.…”

Section: Introductionmentioning

confidence: 99%

Arc characteristics of GTAW under high pressure

Gong

Gao

2019

Sādhanā

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The characteristics of GTA (gas tungsten arc) under high pressure has been studied in this paper to reveal the special arc phenomenon from the ambient pressure. A totally new hyperbaric GTAW experiment system has been built, including a hyperbaric environment simulator (0.1-3.5 MPa), an automatic GTAW machine with cooling, the moving equipment, a camera with filter and a central control unit. The arc morphology, the electric static characteristic, the arc voltage and arc length are studied with the increment of ambient pressure from 0.1 to 3.5 MPa, respectively. The relationship between the ambient pressure and the arc voltage is deduced according to the balance of heat-input and heat-output. The deduced function also verified the results from the welding experiment.

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Properties of Hyperbaric Flux Cored Arc Welds: Weld Metal Chemistry

Cited by 5 publications

References 0 publications

Exploring Possibilities of Implementation of Special Rutile Electrodes for Welding Microalloyed Steels

Exploring Possibilities of Implementation of Special Rutile Electrodes for Welding Microalloyed Steels

Challenges and developments in pipeline weldability and mechanical properties

Arc characteristics of GTAW under high pressure

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