Method for preparing reinforced nickel-based superalloy composite material single crystal blade

Abstract

The invention relates to a method for preparing a reinforced nickel base high-temperature alloy composite material single crystal blade. Ultrafine single crystal nickel powder is used as main raw materials; a reinforcing material is added; other ultrafine refractory metal powder is added according to the formula requirements of high-temperature alloy materials; and an aircraft engine graphene reinforced nickel base high-temperature alloy composite material single crystal turbine blade is prepared through an electromagnetic field constraint induction zone smelting directional solidification recrystallization method after molding. Compared with the prior art, excellent mechanical performance and high heat conductivity of the reinforcing material are fully used for inhibiting generation and development of internal stress cracks during working of the single crystal blade, so that the heat conducting coefficients and the quick heat dissipating performance of the single crystal blade are improved, the high-temperature mechanical performance, the working temperature and the high-temperature fatigue service life of a traditional single crystal blade are prominently improved, and the thrust-weight ratio of an aircraft engine is prominently increased.

Description

technical field [0001] The invention belongs to the technical field of aerospace materials, and in particular relates to a method for preparing single-crystal blades of reinforced nickel-based superalloy composite materials based on electromagnetic field induction of ultrafine nickel powder. Background technique [0002] Monocrystalline blades are cast blades with only one grain. The directionally solidified crystal blades eliminate the transverse grain boundaries that are sensitive to voids and cracks, and make all grain boundaries parallel to the stress axis, thereby improving the high-temperature performance of the alloy. At present, the turbine blades of aero-engines generally adopt the single-crystal hollow structure of composite air-film cooling, but due to its complex structure, low forming precision, and high scrap rate, the industrialization of single-crystal blade casting has not been realized, let alone passed. The addition of a second phase reinforcement enhance...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the nickel-based superalloy single crystal blades produced in the prior art without adding graphene reinforcement materials, low mechanical properties, and short high-temperature fatigue life. An electromagnetic field based on ultra-fine single crystal nickel powder is proposed. The method of inducing the preparation of reinforced single crystal blades of nickel-based superalloy composite materials, by making full use of the excellent mechanical properties and high thermal conductivity of graphene reinforced materials, inhibits the generation and development of internal stress cracks during the operation of single crystal blades, and improves the performance of single crystal blades. Thermal conductivity, in order to quickly dissipate the heat of the blade itself during high temperature use, thereby improving the mechanical properties of the turbine blade at high temperature, especially improving the high temperature fatigue life and working temperature of the turbine blade