Nickel-based high temperature alloy and preparing method thereof

Abstract

The invention provides a nickel-based high temperature alloy and a preparing method thereof, and specifically a metallurgical nickel alloy with powder not containing the element Nb and objects manufactured from the metallurgical nickel alloy. The nickel-based high temperature alloy comprises, by mass, 12.5-13.5% of Co, 13.75-14.25% of Cr, 2.8-3.2% of Al, 3.8-4.2% of Ti, 3.75-4.25% of W, 3.75-4.25% of Mo, 2.8-3.2% of Ta, 0.17-0.23% of Hf, 0.04-0.06% of C, 0.003-0.015% of B, 0.03-0.07% of Zr and the balance Ni. The high temperature alloy has better structure stability and high-temperature strength, and temperature capability of the alloy is further improved.

Description

technical field [0001] The invention relates to the technical field of superalloys, in particular to a nickel-based superalloy and a preparation method thereof. Background technique [0002] Generally speaking, superalloys refer to high-temperature metal materials that can work for a long time 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. Due to the in...

AI Technical Summary

Problems solved by technology

[0004] Although powder metallurgy superalloys have gone through three generations of development, the first generation is characterized by high strength, such as Wasploy, Astraloy, FGH97, etc., and the second generation will focus on improving damage tolerance, such as Rene88(DT), U720Li, FGH96, etc., the development of the third generation focuses on the fusion of excellent high-temperature strength and damage tolerance capabilities, such as ME3, RR1000, etc., but the key hot-end parts of modern gas turbine engines require their nickel-based superalloys to have long-term high-temperature structures Stability, fatigue resistance, corrosion resistance and oxidation resistance, while the mechanical properties of nickel-based superalloys in the process of long-term service at high temperature will decrease significantly in terms of fatigue strength, yield strength and ultimate tensile strength.

Images