Gamma''strengthened high performance casting nickel-based high-temperature alloy

Abstract

The invention provides a gamma' intensified high-performance cast nickel-based high-temperature alloy, which is characterized in that the alloy comprises the compositions by weight percentage as follows: 0.007 to 0.07 percent of C, 0.007 to 0.09 percent of B, 0 to 0.10 percent of Ce, 0 to 0.10 percent of Y, 10.0 to 15.0 percent of Co, 15.0 to 20.0 percent of Cr, 1.0 to 4.0 percent of Mo, 0.2 to 3.0 percent of Al, 0.5 to 3.0 percent of Ti, 0 to 3.0 percent of W, 2.0 to 6.0 percent of Nb, 0 to 6.0 percent of Ta, and the residual amount of Ni, wherein, the contents of impurities by weight percentage are as follows: less than or equal to 0.01 percent of S, less than or equal to 0.01 percent of P, less than or equal to 0.2 percent of Si, less than or equal to 0.0005 percent of Pb, less than or equal to 0.0001 percent of Bi, less than or equal to 0.2 percent of Mn, and less than or equal to 0.5 percent of Fe. The invention changes the alloying compositions, not only has higher high-temperature mechanical performance, but also has excellent long-term application structural stability at 700 DEG C, and can meet the requirement of a cartridge receiver of an airspace engine or an aero-engine with higher service temperature and higher performance requirement.

Description

technical field [0001] The invention relates to industrial technology-metal material science, and particularly provides a γ"-strengthened high-performance casting nickel-based superalloy. Background technique [0002] Inconel 718 alloy was successfully developed by H.L.Eiselstein of INCO Alloys International Huntington Branch (Huntington), and was published in 1959. It is a body-centered tetragonal Ni3Nb (γ") and face-centered cubic Ni3 ( Al, Ti, Nb) (γ') precipitation strengthened nickel-chromium-iron-based deformed superalloy. The alloy has high tensile strength, yield strength, durable strength and plasticity between -253 and 650 ° C, and has Good corrosion resistance, radiation resistance, thermal processing and welding performance. [0003] In the context of the rapid development of superalloy overall precision casting technology, Inconel 718 alloy, originally developed as a deformed superalloy, has also been used in the aerospace industry in the form of casting alloy ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcoming of rapid decline in alloy strength and durable life when the working temperature of K4169 alloy exceeds about 650°C, especially to provide a γ” strengthened High performance casting nickel base superalloy

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