Wpływ par metali na spawanie łukowe, Cz. 1

Murphy, A. B.

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Tytuł artykułu

Wpływ par metali na spawanie łukowe, Cz. 1

Autorzy

Murphy A. B.

Wybrane pełne teksty z tego czasopisma

http://www.pspaw.pl/

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Warianty tytułu

The effects of metal vapour in arc welding, Part 1

Języki publikacji

Abstrakty

Opary metaliczne powstają w procesie spawania przez odparowanie roztopionego metalu w jeziorku spawalniczym, a w przypadku spawania łukowego MAG (gaz-metal) - także w drucie elektrody i kroplach. Obecność oparów może mieć znaczny wpływ na właściwości łuku oraz wielkość i kształt jeziorka spawalniczego. W artykule opisano wcześniejsze prace na temat powstawania i transportu oparów metalicznych w łuku spawalniczym, zwłaszcza mających związek ze spawaniem łukowym MAG oraz TIG. Przedstawiono wpływ oparów metalicznych na termodynamikę, transport oraz właściwości promieniowania plazmy. Wpływ oparów na rozkład temperatury, gęstość natężenia prądu oraz strumień ciepła w łuku, zostały zbadane pod względem właściwości termofizycznych. Porównane zostały także różne sposoby podejścia do dyfuzji oparów metalicznych w plazmach oraz powstawanie oparów z ciekłego metalu. Wzięto także pod uwagę powstawanie dymów spawalniczych w wyniku nukleacji i późniejszej kondensacji oparów. Podano też zalecenia dotyczące tematów wymagających dalszych badań.

Metal vapour is fromed in arc welding processes by the evaporation of molten metal in the weld pool, and in the case of gas-metal arc welding, in the wiere electrode and droplets. The presence of metal vapour can have a major influence on the properties of the arc and the size and shape of the weld pool. Previous experimental and computational works on the production and transport of metal vapour in welding arcs, in particular those relevant to gas-metal arc welding and gas-tungsten arc welding, are reviewed. The influnce of metal vapour on the thermodynamic, transport and radiative properties. Different approaches to treating diffusion of metal vapour in plasmas, and the production of vapour from molten metal, are compared. The production of welding fume by the nucleation and subsequent condensation of metal vapour is considered. Recommendations are presented about subject requiring further investigation, and the requirements for accurate computational modelling of welding arcs.

Słowa kluczowe

spawanie łukowe opary metaliczne właściwości pomiar

arc welding metal vapour properties measurement

Wydawca

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Czasopismo

Przegląd Spawalnictwa

Rocznik

2012

Tom

R. 84, nr 1

Strony

18--28

Opis fizyczny

Bibliogr. 84 poz., il.

Twórcy

autor

Murphy A. B.

CSIRO Materials Science and Engineering, Australia

Bibliografia

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