Effects of Zirconium on Impact Toughness for the Hull Structure Steel Plate

Abstract:

The Gleeble3500 combined with SEM, TEM and other experimental methods are employed in this paper to investigate the effects of zirconium content on impact toughness of heat affected zone (HAZ) of hull structure steel plate during the large heat input welding. The results showed when 0.01% zirconium were added in the steel, the impact energy reached 224 J at-60°C experienced 150 kJ/cm welding heat input. But the large-size rectangular inclusions are found in CGHAZ when 0.02% zirconium were added in the steel, the impact energy fell to 38 J at-60°C experienced 150 kJ/cm welding heat input, the large-size inclusions, especially rectangular inclusion, were the main cause for the sharp decline of low temperature toughness after welding.

• Periodical: Applied Mechanics and Materials (Volumes 644-650)
• Pages: 4932-4935
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.644-650.4932
• Online since: September 2014
• Authors: Tie Li Qi*
• Keywords: Impact Toughness of HAZ, Welding Heat Input, Zirconium-Containing Complex Inclusions

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