ISSN:
1662-9752
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:
After development of the well-known T/P91 steel grade in the early 80’s and its longindustrial experience since early 90’s, it has been necessary to develop new martensitic creepresistant steels to answer the demand of the power generation industry. New USC (ultra-supercritical) boilers require materials with advanced creep properties to reach severe steam parameters.Addition of W to the steel has been found by many researches to be effective to increase creeprupture strength at high temperatures and already used in some developed steel grades such asT/P92, T/P122 and AISI 422 for the USC boilers. Recently, long-term creep strength of theadvanced high Cr ferritic steels has been argued regarding the instability of their microstructures athigh temperatures over 600 °C. This microstructural instability seems to be enhanced withincreasing Cr content or with substitution of Mo by W in the steels. The aim of this paper isconcentrated on the investigation of the microstructural development of the studied steel using theJominy end-face quench test. Different hardness profiles from this test were introduced
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.589.197.pdf
