HIGH-TEMPERATURE NICKEL-BASED ALLOY FOR 700°C GRADE ULTRA-SUPERCRITICAL COAL-FIRED POWER STATION AND PREPARATION THEREOF

The present invention provides a nickel-based superalloy for a 700°C ultra-supercritical coal-fired power plant and a fabrication method thereof. This nickel-based alloy comprises 0.01ˆ¼0.07wt% of C, 23ˆ¼25.5wt% of Cr, 10ˆ¼14.5wt% of Co, 0.3ˆ¼3.5wt% of Mo, 0.5ˆ¼2.5wt% of W, 0.8ˆ¼2.2wt% of Nb, 1.0ˆ¼2...

Full description

Saved in:
Bibliographic Details
Main Authors XIE, Xishan, CHI, Chengyu, HU, Yaohe, LIN, Fusheng, FU, Rui, ZHAO, Shuangqun
Format Patent
LanguageEnglish
French
German
Published 30.01.2019
Subjects
ALLOYS
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
Online AccessGet full text

Cover

More Information
Summary:The present invention provides a nickel-based superalloy for a 700°C ultra-supercritical coal-fired power plant and a fabrication method thereof. This nickel-based alloy comprises 0.01ˆ¼0.07wt% of C, 23ˆ¼25.5wt% of Cr, 10ˆ¼14.5wt% of Co, 0.3ˆ¼3.5wt% of Mo, 0.5ˆ¼2.5wt% of W, 0.8ˆ¼2.2wt% of Nb, 1.0ˆ¼2.5wt% of Ti, 1.0ˆ¼2.5wt% of Al, 0.001ˆ¼0.005wt% of B, 0.01ˆ¼0.3wt% of Zr, 0.002ˆ¼0.015wt% of Mg, less than or equal to 0.5wt% of V, less than or equal to 0.005wt% of La, and the balance of Ni and the inevitable impurity elements. The present invention can effectively prevent the propagation of intergranular cracks at high temperatures, and can improve the impact toughness and creep-rupture strength of the alloy also.
Bibliography:Application Number: EP20140883147