Effects of Rare Earth Addition on the Inclusions and Mechanical Properties of 2205 Duplex Stainless Steel
The effects of rare earth metals on the inclusions and the mechanical properties of 2205 duplex stainless steel were studied by metallographic examination,scanning electron microscope (SEM) and energy spectrum analysis.The results show that the morphologies and sizes of non-metallic inclusions in 2205 duplex stainless steel are changed,and rare earth metals played a very good role of modifying inclusions.The fracture mode of 2205 duplex stainless steel is typical cleavage fracture,but quasi-cleavage and dimple fracture after adding RE into the steel,and the spherical inclusions of rare earth oxysulfide in the dimple are the main factors for this transformation.The transverse impact toughness of 2205 duplex stainless steel is improved obviously by RE.In comparison with 2205 duplex stainless steel without RE,the transverse impact toughness of 2205 duplex stainless steel with RE is increased 20.49% at-40℃,and the room temperature strength are improved,the elongation and reduction of area have been improved 11.67%,24.55% respectively.
RE duplex stainless steel inclusions mechanical properties
Xiao Liu Longmei Wang
Hebei Key Laboratory of Modern Metallurgy Technology,Hebei United University,Tangshan 063009,Hebei,C Metallurgy Department,Central Iron and Steel Research Institute,Beijing 100081,China
国际会议
西安
英文
463-468
2012-06-12（万方平台首次上网日期，不代表论文的发表时间）