New welding process in the manufacturing of UOE pipes.

Hidaka, Takanori; Kimura, Tsurugi; Fujimori, Shigeo

doi:10.2355/isijinternational1966.26.387

Cited by 2 publications

(1 citation statement)

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“…Generally, tubes or pipes are made on a large scale using several welding processes such as electric resistance welding, electric arc welding, high-frequency welding, and submerged arc welding [11,12,13,14]. Machining operations are needed to remove the internal and external flash defects.…”

Section: Introductionmentioning

confidence: 99%

Properties of Welded Copper Tubes Fabricated Via Friction crush Welding

Joma¹,

Subhi²,

Hashim³

2022

ETJ

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The welding process is one of the fabrication processes in which tubes can be performed for structural purposes and transport liquids or gases. This study is focused on the manufacturing, characterization, and evaluation of mechanical properties of welded tubes made from oxygen-free copper (C1020) sheets using friction crush welding. The welded tubes were produced using different tool rotation speeds (1500, 1600, and 1700 rpm) and feed rates (130, 140, and 150 mm/min). The flanged edge height of 2.5 mm and 0.5 mm gap between the ends of the copper sheet was used. All examinations on welded tubes were achieved using different instruments such as optical microscopy, SEM, hardness, and tensile testers. The microstructure study showed good weld quality and good material flow between the two ends of the copper sheet in the weld zone. Moreover, the weld zone was not defective. The lowest hardness was identified in the crush zone due to the coarseness of the copper grains. The highest tensile strength of 105 MPa was obtained at the tool rotation speed of 1500 rpm and 130 mm/min feed rate. The results also showed that ductile fracture is the main source of failure.

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Section: Introductionmentioning

confidence: 99%

Properties of Welded Copper Tubes Fabricated Via Friction crush Welding

Joma¹,

Subhi²,

Hashim³

2022

ETJ

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Influence of heat input and travel speed on microstructure and mechanical properties of double tandem submerged arc high strength low alloy steel weldments

Viano

Ahmed

Schumann

2000

Science and Technology of Welding and Joining

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An evaluation is presented of the microstructural characteristics and mechanical properties of welds in 20 mm thickness high strength low alloy steel HSLA 80, of Australian manufacture. In total, nine butt joints were prepared using the double tandem (four wire) submerged arc welding process in which both heat input and travel speed were varied. The inclusion size distribution was determined for selected welds and showed that heat input had a major effect. Colour etching techniques were used to reveal the solidification structure, which in turn correlated with welding parameters. As the heat input increased, the cooling rate decreased resulting in a larger cellular dendritic cell spacing, decreased acicular ferrite content, and coarser acicular ferrite laths. The effect of travel speed on delta ferrite cell spacing and prior austenite grain size was found to be co-dependent on the heat input and the thermal profile resulting from multiple electrode welding. These results show that increased deposition rates can be achieved by increasing the travel speed and current density without sacrificing joint quality.

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New welding process in the manufacturing of UOE pipes.

Cited by 2 publications

References 0 publications

Properties of Welded Copper Tubes Fabricated Via Friction crush Welding

Properties of Welded Copper Tubes Fabricated Via Friction crush Welding

Influence of heat input and travel speed on microstructure and mechanical properties of double tandem submerged arc high strength low alloy steel weldments

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