Method for preparing nano-phase reinforced nickel-based superalloy by adopting micron ceramic particles

Abstract

The invention provides a method for preparing a nano-phase reinforced nickel-based superalloy by adopting micron ceramic particles. In the nano-phase reinforced nickel-based superalloy, a nickel-basedsuperalloy is taken as a matrix, and one or more of TiC, TiB2, WC and Al2O3 are taken as a reinforcing phase. The particle size of a ceramic particle raw material as the reinforcing phase is 1-5 [mu]m; the adding amount of the ceramic particle raw material is 1 to 5 percent by weight; nickel-based superalloy composite powder with uniformly distributed nano-ceramics is prepared through a specificball milling process; the nano-ceramic phase reinforced nickel-based superalloy is prepared through a 3D printing technology; and the prepared material is uniform in nano-ceramic phase distribution and has excellent mechanical properties. Micron-sized ceramic particles are adopted, so that the cost is low; and parts in any complex shape can be integrally formed and prepared, so that the material utilization rate is increased.

Description

technical field [0001] The invention provides a method for preparing a nano-phase reinforced nickel-based superalloy by using micron ceramic particles, which belongs to the field of nickel-based alloy preparation. Background technique [0002] Nickel-based superalloys have high high-temperature strength, high-temperature creep strength, good fatigue performance, fracture toughness, good oxidation resistance and corrosion resistance, etc., and have good structural stability and reliability at high temperatures, and are widely used It is widely used to manufacture hot-end parts of aviation jet engines and various industrial gas turbines. The development of high thrust-to-weight ratio aero-engines has put forward higher requirements for the comprehensive performance (strength, service temperature, durability, etc.) of nickel-based superalloys. [0003] Ceramic particle reinforced metal matrix composites have the advantages of high specific strength, specific modulus, high temp...

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Problems solved by technology

[0006] Aiming at the problems of easy agglomeration of nano-ceramic particles and poor bonding with the substrate interface, the present invention provides a method for preparing nano-phase-reinforced nickel-based superalloys using micro-ceramic particles. For the first time, it is proposed to use micro-ceramic particles as raw materials and adopt a specific ball milling process Prepare composite powder with uniform distribution of nano-ceramic particles; use 3D printing technology to prepare nano-ceramic phase-reinforced nickel-based superalloy, which realizes the uniform distribution of nano-ceramic phase in the alloy matrix

In the process of 3D printing, the Marangoni convection is used to stir the melt, which promotes the rearrangement of ceramic particles in the melt, solves the problem of nano-ceramic phase agglomeration, and realizes the uniform distribution of nano-ceramic phase in the melt; through laser or electron beam The high-temperature melting and rapid solidification can solve the problem of segregation of nano-ceramic phases and interface defects caused by poor wettability between the ceramic reinforcement phase and the metal matrix; micron-sized ceramic particles are used, and the cost is low; the invention can be integrally formed into any complex shape parts, improve material utilization

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