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Results
Selection of Micro-Jet Gases in Steel Welding to Promote Higher Plastic Properties
Wegrzyn, Tomas (Silesian University of Technology) | Piwnik, Jan (Bialystok University Technology) | Silva, Abilio P. (University of Beira Interior) | Majewski, Wojciech (Am & Hp Sp. ZOO) | Wszolek, lukasz (OSZ Diagno-Test, PL)
The micro-jet technology was tested for low alloy steel welding with Main goal of that paper is to provide innovate technology based on various parameters of the process and also impact toughness test of micro-jet cooling just after steel welding. This technology can be WMD was carried out (Wegrzyn, Piwnik, Baranowski, Silva and Plata, applied in severe conditions of service, such as welding of drilling 2011; Węgrzyn, Piwnik, Łazarz, Hadryś and Wiszała, 2012; Węgrzyn, platforms. The great advantage of this innovative method is to promote Piwnik, Łazarz and Plata, 2012). In this work various gases and higher values of the plastic properties of the welds due the very high mixtures are tested in micro-jet cooling in order to improve the final amount of acicular ferrite (AF), 55-75%, in weld metal deposit properties. Results shows that argon and its mixtures is an optimal (WMD). This method is very promising and capable of industrial solution to growth AF, the most beneficial phase in low alloy steel application, mainly due to the significant improvement of weld quality WMD. and reduced costs.
- Research Report > New Finding (0.49)
- Research Report > Experimental Study (0.49)
Abstract The joining of steel elements by welding process are very popular, in particular in structures applied in ocean environment. These steel structures subject to very severe conditions of service (e.g. offshore under ocean environment) needs to present high plastic properties to support dynamic load such as fatigue and impact solicitations. In the steel microstructure the high content of acicular ferrite (AF) in weld metal deposit (WMD) is a guarantee of high values for the plastic properties. Micro-jet cooling is an innovative method of forced cooling immediately after welding. In this work the number of micro stream of the cooling gas influence are study in order to obtain high impact resistance conditions.