A nickel-based superalloy and gas turbine engine components

Abstract

The invention provides nickel-base superalloy. The nickel-base superalloy is composed of, by mass, 18-20% of Co, 13-15% of Cr, 2.9-3.5% of Al, 3.3-3.7% of Ti, 0.9-1.1% of Ta, 1.8-2.2% of W, 2.5-3.5% of Mo, 0.4-0.6% of Nb, 0.1-0.3% of Hf, 0.02-0.06% of C, 0.003-0.012% of B, 0.02-0.06% of Zr and the balance Ni and inevitable impurities. By optimizing elements of Al, Ti, Nb and Ta, the volume fraction of gamma' is increased, so that the precipitation capacity of harmful phases during the long-time service process at a high temperature of the superalloy material is lowered, and the structure stability of the material is improved. By adjusting the contents of W and Mo, the solution strengthening effect is improved, and the content of TCP phases is lowered. In addition, the contents of Hf and B of the alloy are adjusted, the content of Ta is increased, so that the stability of the gamma' phase and MC phase is improved, and precipitation of a previous particle boundary (PPB) is effectively improved. Accordingly, the harmful phase generation tendency of the nickel-base superalloy during high-temperature long-time service is well eliminated, and the fatigue performance of the alloy material is improved.

Description

technical field [0001] The invention relates to the technical field of superalloys, in particular to a nickel-based superalloy and gas turbine engine components. Background technique [0002] Generally speaking, superalloys refer to high-temperature metal materials that can work for a long time at temperatures above 600°C and under certain stress conditions. performance. With the rapid development of industry, superalloys have shown good application prospects in various fields, and are mainly used to manufacture high-temperature components such as turbine blades, guide vanes, turbine disks, high-pressure compressor disks, and combustion chambers of gas turbine engines. [0003] According to the preparation process, superalloy materials can be divided into deformed superalloys, cast superalloys and powder metallurgy superalloys. Superalloy materials can be divided into iron-based superalloys, nickel-based superalloys and cobalt-based superalloys according to matrix elements...

AI Technical Summary

Problems solved by technology

[0004] Although nickel-based superalloys have excellent high-temperature properties such as fatigue resistance, corrosion resistance, and oxidation resistance, nickel-based alloys that have been served at high temperatures for a long time will have obvious mechanical properties such as fatigue strength, yield strength, and ultimate tensile strength. decline

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