Prediction of thermal loads and structure composition in elements welded by laser-ARC hybrid welding technique

• Autorzy: Piekarska W. , Kubiak M. , Saternus Z.
• Języki publikacji: EN

Abstrakty

EN

The paper concerns numerical modelling of the temperature field with motion of liquid metal in the melted zone and estimation of the structure composition in the laser-arc hybrid welded joint. Coupled transport phenomena of heat transfer in butt welded plate and fluid flow in the melted zone were described respectively by the transient heat transfer equation with convective term and Navier-Stokes equation. Mathematical models describing electric arc and laser beam heat sources are presented in this study. The latent heat associated with of the material's state changes and latent heat of phase transformations in solid state were taken into consideration in a solution algorithms. On the basis of determined temperature field, structure composition in welded plate made of S355 steel was numerically estimated. Presented results of numerical calculations include temperature field, velocity field in the melted zone and structure composition of welded flat. The influence of chosen process parameters and liquid metal motion in the welding pool on the weld shape and size is analyzed.

PL

Artykuł jest poświęcony modelowaniu numerycznemu pola temperatury z uwzględnieniem ruchu ciekłego metalu w strefie przetopienia oraz prognozowaniu numerycznego składu strukturalnego złącza spawanego metodą hybrydową laser-łuk elektryczny. Sprzężone zjawiska transportu ciepła w spawanym doczołowo płaskowniku i ruchu cieczy w strefie przetopienia opisano odpowiednio równaniem nieustalonego przewodzenia ciepła z członem konwekcyjnym oraz równaniem Naviera-Stokesa. W artykule przedstawiono modele rozkładu mocy źródła ciepła: łuku elektrycz-

Słowa kluczowe

EN

laser-arc hybrid welding; temperature field; fluid flow; phase transformations; numerical modelling

• Wydawca: Wydawnictwo Politechniki Poznańskiej
• Czasopismo: Archiwum Technologii Maszyn i Automatyzacji
• Rocznik: 2011
• Tom: vol. 31, nr 3
• Strony: 29--38
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Piekarska W.

autor

Kubiak M.

autor

Saternus Z.

• Institute of Mechanics and Machine Design Foundations, Częstochowa, University of Technology

Bibliografia

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