Microstructure evolution of 310S heat-resistant stainless steel during long term aging at high temperature

doi:10.13251/j.issn.0254-6051.2021.07.011

Abstract

Abstract: Microstructure evolution of the 310S heat-resistant stainless steel after aging at 950 ℃ for 50-3000 h was investigated by optical microscope (OM), scanning electron microscope (SEM) and energy dispersive X-ray spectrometer(EDS),microhardness tester as well as X-ray diffraction instrument (XRD).The experimental results indicate that the major precipitates are Cr₂₃C₆ and σ phase after aging. When the aging time is 50 h, the carbide Cr₂₃C₆ precipitates before the σ phase. During aging, the number of Cr₂₃C₆ increases at first and then decreases, while the content of σ phase increases all the time.

Key words: heat-resistant stainless steel, aging treatment, precipitated phase

CLC Number:

TG113.1

Miao Huajun, Li Guoping. Microstructure evolution of 310S heat-resistant stainless steel during long term aging at high temperature[J]. Heat Treatment of Metals, 2021, 46(7): 56-59.

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