Specifics of Laser Welding of Ductile Iron, Cr-Mo Steel and their Dissimilar Butt Joints

Kód výsledku v IS VaVaI

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Nalezeny alternativní kódy

RIV/68407700:21260/10:00173208

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Specifics of Laser Welding of Ductile Iron, Cr-Mo Steel and their Dissimilar Butt Joints

Popis výsledku v původním jazyce

Laser welding of 1) ductile iron, 2) Cr-Mo low alloy steel and 3) their dissimilar butt joints was executed. Both materials were separately subjected to research of their laser weldability. Spattering and melt flows during laser welding were observed using high speed video cameras and also X-ray transmission real-time observation system. The materials showed very different behaviour in respect to cracking, spattering, underfilling, melt flows and so on. In ductile iron, cracking due to cementite formation, spattering and underfilling occurred easily. For low alloy steel, solidification cracking was the problem. In dissimilar welding, the solidification process, the consequent weld metal phases, hardness and other properties were significantly different. To produce sound welds in welding dissimilar metals, a Ni-based filler wire and the laser beam misalignment were investigated, and the effects on the prevention of cracking were confirmed.

Název v anglickém jazyce

Specifics of Laser Welding of Ductile Iron, Cr-Mo Steel and their Dissimilar Butt Joints

Popis výsledku anglicky

Laser welding of 1) ductile iron, 2) Cr-Mo low alloy steel and 3) their dissimilar butt joints was executed. Both materials were separately subjected to research of their laser weldability. Spattering and melt flows during laser welding were observed using high speed video cameras and also X-ray transmission real-time observation system. The materials showed very different behaviour in respect to cracking, spattering, underfilling, melt flows and so on. In ductile iron, cracking due to cementite formation, spattering and underfilling occurred easily. For low alloy steel, solidification cracking was the problem. In dissimilar welding, the solidification process, the consequent weld metal phases, hardness and other properties were significantly different. To produce sound welds in welding dissimilar metals, a Ni-based filler wire and the laser beam misalignment were investigated, and the effects on the prevention of cracking were confirmed.

Druh

D - Stať ve sborníku

CEP obor

JR - Ostatní strojírenství

OECD FORD obor

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Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 74th Laser Materials Processing Conference

ISBN

978-4-947684-75-2

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

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Název nakladatele

The Laser Society of Japan

Místo vydání

Osaka

Místo konání akce

Tokyo University, Tokyo

Datum konání akce

6. 12. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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