Transactions of Materials and Heat Treatment

Title：Analysis on quality stability of alloy GH4169 bars at home and abroad

Authors： Zhang Fang Wang Linqi

Unit： AVIC Special Metal（Xian）Corporation AVIC Metal Test Technology Company Limited

KeyWords： database of metal material properties alloy GH4169 bars grain size mechanical property cobalt element

ClassificationCode：TG314.3；V252

year,vol(issue):pagenumber：2016,41(9):111-120

Abstract：

Superalloy is the most commonly used material for the manufacture of hot-section component in

advanced aero-engine. But at present, there is few research reports about the performance

index and the quality stability of the bar. The physicochemical properties data, relating six

superalloy manufacturing enterprises at home and abroad, of alloy GH4169 bars were collected

from AVIC Heavy Machinery Co.,Ltd. database, and their composition, grain size, room and high

temperature mechanical properties were studied and compared with 121 times heating alloy

GH4169 bars. The results show that the elements control in China is equivalent to the same

level as that in foreign, even the control of some elements is stricter than the foreign one.

However, the control of the main strengthening element Nb is instable at different heats in

China, and the cobalt content of alloy GH4169 bars is lower than one order of magnitude

deviated from that in foreign. In addition, both the grain size and mechanical properties of

the alloys are also instable.

Funds：

张方（1984-），男，硕士，高级工程师

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