Low Alloy Steel Structures After Welding with Micro-Jet Cooling

The paper focuses on low alloy steel after innovate welding method with micro-jet cooling. Weld metal deposit (WMD) was carried out for welding and for MIG and MAG welding with micro-jet cooling. This method is very promising mainly due to the high amount of AF (acicular ferrite) and low amount of M...

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Bibliographic Details
Published in:Archives of metallurgy and materials 2017-03, Vol.62 (1), p.115-118
Main Authors: Węgrzyn, T., Piwnik, J., Hadryś, D., Wszołek, Ł.
Format: Article
Language:English
Subjects:
Argon
Austenite
Automobile industry
Automobiles
Automotive engineering
Automotive parts
Cooling
Ferrite
Gas mixtures
Helium
Impact strength
impact toughness
Low alloy steels
Mechanical properties
Metal active gas welding
micro-jet
Nitrogen
Retained austenite
steel
Steel structures
Structural steels
Tempered martensite
Toughness
Welded joints
Welding
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Summary:The paper focuses on low alloy steel after innovate welding method with micro-jet cooling. Weld metal deposit (WMD) was carried out for welding and for MIG and MAG welding with micro-jet cooling. This method is very promising mainly due to the high amount of AF (acicular ferrite) and low amount of MAC (self-tempered martensite, retained austenite, carbide) phases in WMD. That structure corresponds with very good mechanical properties, ie. high impact toughness of welds at low temperature. Micro-jet cooling after welding can find serious application in automotive industry very soon. Until that moment only argon, helium and nitrogen were tested as micro-jet gases. In that paper first time various gas mixtures (gas mixtures Ar-CO ) were tested for micro-jet cooling after welding.
ISSN:2300-1909
1733-3490
2300-1909
DOI:10.1515/amm-2017-0015