High-temperature Microstructure and Mechanical Performance of As-cast 2205 Duplex Stainless Steel

Li Yan; Du Zhongze; Hu Kuntai

Volume 33 Issue 2

Apr. 2012

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Li Yan, Du Zhongze, Hu Kuntai. High-temperature Microstructure and Mechanical Performance of As-cast 2205 Duplex Stainless Steel[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(2): 82-86.

Citation:

Li Yan, Du Zhongze, Hu Kuntai. High-temperature Microstructure and Mechanical Performance of As-cast 2205 Duplex Stainless Steel[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(2): 82-86.

Li Yan, Du Zhongze, Hu Kuntai. High-temperature Microstructure and Mechanical Performance of As-cast 2205 Duplex Stainless Steel[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(2): 82-86.

Citation:

Li Yan, Du Zhongze, Hu Kuntai. High-temperature Microstructure and Mechanical Performance of As-cast 2205 Duplex Stainless Steel[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(2): 82-86.

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High-temperature Microstructure and Mechanical Performance of As-cast 2205 Duplex Stainless Steel

1. School of Metallurgy Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, Shanxi, China;
2. Continuous Casting Center, Central Iron and Steel Research Institute, Beijing 100081, China

Received Date: 2011-09-16

Abstract

Abstract

High-temperature short-time tensile test of as-cast 2205 duplex stainless steel was performed and the variation of tensile strength and percentage reduction in area of the specimen at different temperatures was analyzed.The high-temperature microstructures and fracture morphologies were observed at 1 300 ℃,1 050 ℃,950 ℃ and 850 ℃.The test results showed that duplex stainless steel exhibited good plasticity at 1 150~1 350 ℃.Softening was inhibited due to high strain rate at 1 000~1 100 ℃,resulting in a brittleness temperature range Ⅱ present in the duplex stainless steel.In addition,crack propagated further due to loose and fine precipitation of the specimen.Presence of brittleness temperature range Ⅲ was the result of grain boundary embrittlement mainly caused by the nitride and carbonitride etc.precipitated at austenitic grain boundaries.
- duplex stainless steel,
- continuous casting slab,
- high-temperature mechanical performance,
- fracture morphology,
- loose

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