617合金的组织稳定性

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Abstract The microstructure stability of alloy 617, which is one of candidate materials for high temperature component of advanced ultra-supercritical coal-fire generating unit, was investigated after aging 1000, 2000, 3000 and 5000h at 750℃. Optical microscope, scanning electron microscope, transmission electron microscope and X-ray diffraction were used to analyze the intergranular and intragranular precipitates after aging. The results show that M23C6 carbide precipitates at grain boundaries; while the intragranular precipitate of γ′ is dispersoid distribution, and the size increases with aging time. The strength of test material increases after 1000h aging, and then the trend changes to smooth with aging time. And toughness of the test material decreases with aging time.

Received: 13 June 2013 Published: 20 February 2014

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	YANG Quan
	TAN Shu-Beng

Cite this article:

YANG Quan,TAN Shu-Beng. Analysis for the Microstructure Stability of Alloy 617[J]. Iron and Steel, 2014, 49(2): 60-64.

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http://www.chinamet.cn/Jweb_gt/EN/ OR http://www.chinamet.cn/Jweb_gt/EN/Y2014/V49/I2/60

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