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:
A recent developed Ni-Cr-Co-Mo-Nb-Ti-Al type nickel-base superalloy, INCONEL 740,has been selected for the application of USC boilers at the temperature above 750ºC. This paperfocuses on the structure stability improvement of this alloy. Phase computation by Thermo-Calc hasbeen adopted to study main influencing factors on precipitating phases of the alloy and the resultsshow that the ratio of Al/Ti plays an important role. Four new modified alloys in adjustment of Al andTi contents and in control of Si level were designed and melted for experimental study. The resultsindicate that the modified alloys exhibit more stable structure stability at 750, 800 and 850ºC longtime exposure. The newly developed alloy can be adopted for engineering production and applicationfor USC power plants at temperature above 750ºC
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.471.pdf
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