Method of preparing high-temperature nickel-based alloy porous material by 3DP (three-dimensional printing) and aftertreatment process

Abstract

The invention discloses a method of preparing a high-temperature nickel-based alloy porous material by 3DP (three-dimensional printing) and an aftertreatment process. The method comprises the following steps of: step A. mixing powder, to be specific, fully mixing a certain proportion of metal powder such as Ni, Cr, and Fe with polyvinyl alcohol powder; step B. carrying out macroscopic direct pore-forming, to be specific, designing a three-dimensional model being of a porous structure by three-dimensional design software according to the appearance feature, porosity, pore distribution law and pore shape and size design requirements of the porous material; step C. preparing the porous material by 3DP, to be specific, 3DP equipment receives a printing program, and sets printing parameters tostart printing; step D. removing residual powder, to be specific, firstly taking out a rough blank from a powder stack, and then removing the residual powder on the rough blank; step E. debonding andatmosphere sintering treatment, to be specific, sending the rough blank to a muffle surface for debonding and atmosphere sintering; step F. carrying out electrochemical corrosion, to be specific, carrying out electrochemical corrosion treatment on the sintered nickel-based porous material; step G. carrying out cryogenic treatment, to be specific, putting a workpiece in a cryogenic device for cryogenic treatment; and step H. completing the preparation and aftertreatment of the high-temperature nickel-based alloy porous material.

Description

technical field [0001] The invention relates to the technical field of 3D printing and molding manufacturing, in particular to a method for preparing a high-temperature nickel-based alloy porous material by a 3DP method and a post-treatment process. Background technique [0002] Metal porous materials are widely used in filtration, separation, catalysis, and noise reduction because of their stable pore shape, high temperature and high pressure resistance, corrosion resistance, oxidation resistance, good permeability, excellent mechanical properties, machinability, and good biocompatibility. Functional materials such as shock absorption, adsorption and human implants are widely used in aerospace, petrochemical, metallurgy, medicine, construction and environmental protection and other fields. Inside the metal porous material, there are a large number of random or directional pores, and the diameter of these pores ranges from 2 μm to 3 mm. Metallic porous materials can make up...

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Problems solved by technology

At the same time, this patent is not aimed at porous metal materials. Porous metal materials not only need to improve the mechanical properties through cryogenic treatment, but also need to improve the structural characteristics of porous materials through other post-treatments.