ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
P92 steels as well as P91 are widely used as boiler tube materials of ultra super critical(USC) power plants these days. And thus embrittlement is very important for structural integrity ofthe USC plants. The embrittlement was observed when P92 (Modified 9Cr-1.8W-0.5Mo-V-Nb)steels were quenched to and held at the temperature of 320 to 350°C, which were the temperaturesintermediate between Ms and Mf, and then air-cooled. Nearly same kind of the embrittlement hadbeen observed with the T/P91 steels and a theory had been proposed to explain the mechanism ofthe embrittlement by us. From the theory, the embrittlement might be caused by the brittlemartensite which is freshly formed during air-cooling. We tried to apply the theory for theembrittlement of the T/P92 steel. The behaviors of the embrittled T/P92 steel were explained wellby the theory
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.465.pdf
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