Nickel-based powder superalloy with high tensile strength

Abstract

The invention discloses nickel-based powder superalloy with high tensile strength and belongs to the technical field of powder superalloy. The nickel-based powder superalloy comprises the following chemical components by mass percent: 0.03-0.07% of C, 16.0-17.5% of Co, 8.5-10.5% of Cr, 5.8-6.2% of W, 4.0-4.5% of Mo, 4.8-5.3% of Al, 1.6-2.0% of Ti, 2.4-2.8% of Nb, 0.1-0.4% of Hf, less than 0.02% of B, less than 0.02% of Zr, less than 0.01% of Mg, less than 0.01% of Ce and the balance of Ni. The nickel-based powder superalloy has the advantages that the tensile strength and high temperature lasting life of the nickel-based powder superalloy are superior to those of FGH97 alloy.

Description

technical field [0001] The invention belongs to the technical field of powder superalloy. In particular, it relates to a nickel-based powder superalloy with high tensile strength, a high-strength disc nickel-based powder superalloy used below 650°C. By increasing the content of cobalt (Co), chromium (Cr), tungsten (W), molybdenum (Mo) and carbon (C) elements, the tensile strength of nickel-based powder superalloy FGH97 alloy is improved. Background technique [0002] Compared with traditional cast superalloys, powder superalloys are formed by cooling the pre-alloyed powder at a high cooling rate, which makes the composition of the alloy uniform, eliminates macro segregation, and the grain size reaches the micron level, which improves the thermal processing performance of the alloy , improving the tensile strength of the alloy. Powdered superalloys are key materials for hot-end rotating parts such as aeroengine turbine disks. [Zhang Yiwen, Yang Shizhong, Li Li, etc. Resear...

AI Technical Summary

Problems solved by technology

[0005] The FGH97 alloy developed by the General Institute of Iron and Steel Research is characterized by a γ′ phase content of up to 60%, excellent durability and creep properties, but low tensile strength