Microstructure and properties of TP347HFG steel after high temperature service

doi:10.13251/j.issn.0254-6051.2020.04.012

Abstract

Abstract: The microstructure and properties of superheater tube made of TP347HFG steel after running for 1.2×10⁴ h and 7.5×10⁴ h at high temperature was analyzed by means of metallographic microscope, SEM, EDS and universal testing machine. The results show that the TP347HFG steel after service for 1.2×10⁴ h and 7.5×10⁴ h at high temperature can still maintain obvious twin characteristics, the NbC precipitated is conducive to maintaining the structural stability of the material. The mechanical properties of the material can remain stable after service at high temperature, the strength increased with the serviced time extend while the plasticity changed little.

Key words: TP347HFG steel, high temperature service, microstructure, precipitates, mechanical properties

CLC Number:

TG142.2

Song Tao, Wang Zhiwu. Microstructure and properties of TP347HFG steel after high temperature service[J]. Heat Treatment of Metals, 2020, 45(4): 60-62.

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