Numerical modelling of welding of duplex steel

• Main Authors: Florek, Anton, Kříž, Antonín, Vilcsek, Igor
• Format: Conference Proceeding
• Language: English
• Subjects: Alloying; Austenitic stainless steels; Butt welding; Computer simulation; Duplex stainless steels; Ferritic stainless steels; Organic chemistry; Stainless steel; Welded joints; Welding parameters
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.5138618

A steel will not become widely accepted and used unless it can be successfully welded without too many limitations. Contemporary duplex stainless steel grades fulfil these requirements with some grade dependent differences. The duplex stainless steel family has, during the last decade, been extended with new lean grades and recently also highly-alloyed hyperduplex grades. Most welding recommendations are very similar to those of the 1990’s. However, the introduction of new grades and the increased use of newer welding methods has somewhat changed the perception of what is possible. This paper discusses about Research Welding Super Duplex Steel Wr. N, 1.4410 (S322750). It is suitable for use at temperatures up to 300 °C. Therefore, it is often used in chemical with petrochemical plants. This paper presents continuous results of the austenitic-ferritic (duplex) stainless steel welding research. Simulation of butt welding of the S322750 duplex plasma for the determination of welding parameters into pWPS and analysis of the sample microstructure from the plasma test weld joint on duplex 1.4410 (X2CrNiMoN25-7-4) with international designation S322750. The experiments that have been performed so far and their computer simulations show a good match of the individual phases of austenite and ferrite in the weld joint.