Nickel-based deformation high temperature alloy being higher than 700 DEG C in service temperature and preparation method of same

Abstract

The invention discloses a nickel-based deformation high temperature alloy being higher than 700 DEG C in service temperature and a preparation method of same. The alloy includes, by weight, 11.0-14.0% of Co, 15.0-17.0% of Cr, 3.3-4.3% of Mo, 3.3-4.3% of W, 1.6-2.7% of Al, 3.0-4.0% of Ti, 0.6-1.2% of Nb, 0.005-1.2% of Ta, 0.005-0.02% of B, 0.005-0.05% of C, 0.02-0.07% of Zr, 0.001-0.1% of Mg, 0-2.0% of V, 0.2-4.5% of Fe, 0.001-0.01% of Ce and the balanced being Ni. By controlling the content of low-interstitial element C, adding microelements Ce and Mg which are beneficial to hot-working plasticity, and adding a certain amount of Ta for regulating the ratio of precipitation strengthening elements Al, Ti, Nb and Ta, the alloy has the similar comprehensive performance as a second-generation powder high temperature alloy FGH96 at above 700 DEG C, but is greatly reduced in cost than the latter. The alloy has high reliability, is low in whole-life cost and is high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of nickel-based deformed superalloy preparation, in particular to a low-pressure turbine disc, compressor disc sealing disc, shaft, ring and other hot end components suitable for the preparation of high thrust-to-weight ratio aero-engines. The service temperature reaches 700 °C. Nickel-based deformed superalloy above ℃ and its preparation method. Background technique [0002] Aero-engines are gradually developing in the direction of high thrust-to-weight ratio and long life. At present, the thrust-to-weight ratio of advanced aero-engines at home and abroad has reached more than 12. Increasing the turbine inlet temperature is one of the ways to achieve high thrust. The higher the temperature, the higher the performance of the hot-end components such as the turbine disk of the engine, especially the high-temperature performance. The traditional deformed superalloy can no longer meet the use requirements. At t...

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Problems solved by technology

[0003] Nickel-based superalloys in service at temperatures above 700 °C generally contain refractory elements such as Mo and W, and precipitation strengthening phase-forming elements such as Al, Ti, Nb, and Ta. The content of the strengthening phase γ' exceeds 40%, and the high alloying degree makes The degree of segregation of the alloy is intensified and the thermoplasticity is deteriorated. It is difficult to prepare by the traditional deformation casting-forging process, so only the powder metallurgy process can be used, such as Rene 88DT and Rene104 in the United States, RR1000 alloy in Europe, etc.

However, the current composition of powdered nickel-based superalloys is not suitable for the casting-forging process of deformed superalloys, and it is difficult to obtain alloy parts with qualified properties.

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