NI-BASED SUPERALLOY HAVING HIGH THERMAL CORROSION RESISTANCE AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2022/233284

A1

The present application discloses a Ni-based superalloy having high thermal corrosion resistance, comprising by mass: C: 0.05-0.16%, Cr: 6.5-12.0%, Ru: 0.5-4.0%, Y: 0.05-0.16%, Co: 9.0-11.2%, W: 9.0-11.2%, Mo: 0.2-1.0%, Al: 5.0-6.0%, Ti: 0.5-1.5%, B: 0.01-0.02%, Zr: 0.004-0.06%, Mg: 0.001-0.005%, Re: 0-3.0%, and the remainder being Ni and inevitable impurities. In the present application, the content of Cr in the alloy is increased by introducing Ru into the alloy. When the content of Cr and Ru by mass percentage in the alloy of the present application satisfies the relational formula 9.0%≤Cr+Ru≤15.0%, the thermal corrosion resistance of the Ni-based superalloy can be improved while ensuring the strength of the alloy.

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SHU GUOGANG (CN)
LIU WEI (CN)
XU CHAO (CN)
DUAN FANGMIAO (CN)
YU ZHIYONG (CN)
SUN JIAN (CN)
ZHANG TAO (CN)

PCT/CN2022/090691

November 10, 2022

April 29, 2022

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CHINA UNITED GAS TURBINE TECH CO LTD (CN)

C22C19/05; C22F1/10

WO2021064358A1

2021-04-08

CN113265563A	2021-08-17
KR20180081313A	2018-07-16
CN106636760A	2017-05-10
CN101652487A	2010-02-17
CN107034387A	2017-08-11
CN110317990A	2019-10-11
CN103436739A	2013-12-11
JP2007211273A	2007-08-23

TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)

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