Effect of Rare Earth Metals on Inclusions and Impact Property of 2205 Duplex Stainless Steel

Abstract:

The effect of rare earth metals on inclusions and impact toughness of 2205 duplex stainless steel were studied by SEM and electron spectroscopy. Thermodynamic calculation was used to analyze the formation of RE inclusions in 2205 duplex stainless steel. The result shows that aluminosilicate compound inclusion and sulfide inclusion can be entirely replaced by RE2O2S and RES. Fracture is changed from cleavage to ductile fracture by adding RE to the 2205 duplex stainless steel, and the spherical rare earth oxysulfide inclusions-RE2O2S in the dimple are the main factors. The transverse impact value of 2205 duplex stainless stainless steel has been improved obviously by RE. The transverse impact value of RE-2205 is increased 20.49% at the temperature of -40°C, comparing with 0RE-2205.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 411-418
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.411
• Online since: February 2012
• Authors: Xiao Liu, Long Mei Wang
• Keywords: Duplex Stainless Steel, Inclusion, Mpact Property, Rare Earth (RE), Thermodynamic Calculation

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