Induction brazing of thin-walled pipes from AISI 304 steel using copper-based solder

Behúlová, Mária; Vrtiel, Š.; Nagy, Máté

doi:10.1088/1757-899x/465/1/012001

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…To determine the limit state, it is necessary to determine the internal and external points on the curve. The internal points on the curve were determined as the local maxima of the dependence of the strain rate on time in the direction of the sample's thickness, according to Equation (5).…”

Section: Methodsmentioning

confidence: 99%

“…The service life of the exhaust system parts on the inside is affected by changes in temperature, in salt concentration, and in concentration of the alkaline and acid condensates. Condensates such as sulfurous acid, sulfuric acid, and low levels of hydrochloric acid, and critical pH values cause corrosion of the exhaust system parts on the The corrosion resistance of these steels is guaranteed by the chromium content, which accounts for at least 10.5% [5][6][7]. When heated, chromium forms a protective coating of chromium oxide, which delays further oxidation.…”

Section: Introductionmentioning

confidence: 99%

“…Adding nickel to steel can also lead to an increase in the range of critical temperatures. In combination with nickel, chromium improves tensibility and toughness [5].…”

Section: Introductionmentioning

confidence: 99%

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Formability Prediction of Laser-Welded Stainless Steel AISI 304 and AISI 430

Evin

Tomáš

2021

Metals

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The effect of laser welding on the mechanical properties and the prediction of formability for austenitic stainless steel AISI 304 and ferritic steel AISI 430 when welded by a YLS-5000 fiber laser, were studied in the paper. The microstructure of the welded joint was analyzed using light microscopy. The mechanical properties were determined by static tensile testing. The forming limit diagrams were produced from notched samples at R5, R17, and R25 mm. The hardness values of the welded joint and the base material were determined using the Vickers method. Samples made of AISI 430 showed that the formability suffered due to laser welding. Longitudinal coarse ferrite grains were observed in the microstructure of the AISI 430 weld metal. The coarse-grained structure of the welded joint and the continuous interface along the centerline caused the failure of the AISI 430 laser-welded samples at significantly lower actual stress and strain values than were required to break the base material. No significant changes in the formability were observed in the AISI 304 samples after laser welding. The growth of dendrites was observed in the microstructure of the AISI 304 welded joint in a direction towards the centerline of the welded joint. A comparison of the experimentally determined FLD0 values and the values calculated from predictive equations showed that a better agreement was achieved for uniform elongation than for the strain hardening exponent. The manufacturability and economic efficiency of selected parts of an exhaust system by hydromechanical drawing were evaluated on the basis of the process capability index Cpk.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Formability Prediction of Laser-Welded Stainless Steel AISI 304 and AISI 430

Evin

Tomáš

2021

Metals

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“…Fusion welding processes are very common with thin-walled pipe connections and the most widely used joint is the soldered/brazed connection [28]. Soldering is based on heating and melting a filler material, which solidifies and forms a permanent connection between the two parts.…”

Section: Fusion Weldingmentioning

confidence: 99%

Manufacturing technologies and joining methods of metallic thin-walled pipes for use in high pressure cooling systems

McNair

Shokrani

Carnevale

et al. 2021

Int J Adv Manuf Technol

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Small diameter thin-walled pipes, typically with a diameter less than 20 mm and a ratio of outer diameter to wall thickness is 20 or above, have increasingly become a key value adding factor for a number of industries including medical applications, electronics and chemical industries. In high-energy physics experiments, thin-walled pipes are needed in tracking detector cooling systems where the mass of all components needs to be minimised for physics measurement reasons. The pipework must reliably withstand the cooling fluid operation pressures (of up to 100 bar), but must also be able to be reliably and easily joined within the cooling system. Suitable standard and/or commercial solutions combining the needed low mass and reliable high-pressure operation are poorly available. The following review of literature compares the various techniques that exist for the manufacture and joining of thin-walled pipes, both well-established techniques and novel methods which have potential to increase the use of thin-walled pipes within industrial cooling systems. Gaps in knowledge have been identified, along with further research directions. Operational challenges and key considerations which have to be identified when designing a system which uses thin-walled pipes are also discussed.

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Induction Brazing Analysis of EAST Fast Control Coil Conductor

Wang¹,

Han²,

He³

et al. 2019

Manufacturing Technology

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To achieve much higher operation parameters of EAST device, some key components are upgraded. Fast control coil as one of the key components is updated by using novel stainless steel mineral insulation conductor and the turns are increased to 4, which means the coil's operation environment becomes more severe and larger loads will be encountered. The coil joint is apt to be destroyed in view of the potential defects during the fabrication. Given the numerous advantages, the induction brazing is being considered for the conductor joint connection. The copper mock up is used to carry out the feasibility analysis. Based on the structural size of copper tube, the brazing parameters are calculated and a 2 turns splitting induction coil is designed. Some influence factors effecting the induction efficiency are analysed. It will provide guidance for choice of power supply and the optimization design of induction coil. In addition, the induction experiment is launched and comprehensive joint performance tests are subsequently performed. The test results indicate the joint overall performance could satisfy the basic engineering design requirement, but also some defects are found and more study should be carried out and to further improve the brazing quality.

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Induction brazing of thin-walled pipes from AISI 304 steel using copper-based solder

Cited by 4 publications

References 12 publications

Formability Prediction of Laser-Welded Stainless Steel AISI 304 and AISI 430

Formability Prediction of Laser-Welded Stainless Steel AISI 304 and AISI 430

Manufacturing technologies and joining methods of metallic thin-walled pipes for use in high pressure cooling systems

Induction Brazing Analysis of EAST Fast Control Coil Conductor

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