Method for preparing multielement transition interface cooperative-reinforced nickel base composite material by 3D printing

A technology of 3D printing and transition interface, applied in the direction of additive processing, additive manufacturing, process efficiency improvement, etc., can solve the problems of strict three-dimensional shape requirements, complex forming process, etc., and achieve improved resource utilization, enhanced integration, and increased hardness Effect

Active Publication Date: 2016-07-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the complex forming process, strict requirements on the three-dimensional shape of the workpiece, and the problems and deficiencies in the structure and performance of the formed workpiece in the traditional technology, and to provide a 3D printing preparation of a multi-element transition interface synergistically reinforced nickel-based composite The material method, which can manufacture workpieces with arbitrary complex shapes, obtain high strength, high hardness, good plasticity and toughness, and produce novel interfacial bonding structures under the action of laser

Method used

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  • Method for preparing multielement transition interface cooperative-reinforced nickel base composite material by 3D printing
  • Method for preparing multielement transition interface cooperative-reinforced nickel base composite material by 3D printing
  • Method for preparing multielement transition interface cooperative-reinforced nickel base composite material by 3D printing

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Embodiment 1

[0048] Such as figure 1 As shown, the 3D printing method of the present invention to prepare a multi-element transition interface synergistically reinforced nickel-based composite material comprises the following steps:

[0049] (1) The powder of Inconel718 was obtained by gas atomization method, the purity of which was above 99.6%, and the average particle size was 30-50 μm. Mix WC particles with an average particle size of 10-30 μm with the above-mentioned Inconel718 powder, and the weight ratio of the two is 1:3;

[0050] (2) The WC / Inconel718 mixed powder obtained above is formed by laser processing and 3D printing technology. Firstly, use CAD software to establish a three-dimensional model of the required workpiece on the computer, and slice and layer it to obtain a series of two-dimensional layered planes. Then, use the powder coating device of the laser processing 3D printing equipment to send the powder to the forming substrate, and the thickness of the powder coatin...

Embodiment 2

[0054] The difference between this embodiment and Embodiment 1 is that the scanning velocity V is set to 960 mm / s, and the laser energy linear density η is 125 J / m, and the others are the same as Embodiment 1.

[0055] Figure 4 The microstructure photo of the nickel-based composite material obtained in Example 2 of the present invention; according to the contents of the diagram, it can be seen that no obvious multi-element transition interface is formed when the laser energy line density is 125J / m (less than 150J / m) structure.

Embodiment 3

[0057] The difference between this embodiment and Embodiment 1 is that the scanning velocity V is set to 800 mm / s, and the laser energy linear density η is 150 J / m, and the others are the same as Embodiment 1.

[0058] Figure 5 This is the microstructure photograph of the nickel-based composite material prepared in Example 3 of the present invention; according to the illustration, it can be seen that when the laser energy line density is 150J / m, a multi-element transition interface structure is formed.

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Abstract

The invention discloses a method for preparing a multielement transition interface cooperative-reinforced nickel base composite material by 3D printing. A proper amount of WC particles is added in Inconel 718 powder; a 3D printing technology is processed through laser; when the linear density of laser energy is located in a range from 150 J / m to 250 J / m, a multielement transition interface is formed between a reinforced phase and a basal body; and the multielement transition interface and the added WC particles achieve an effect of cooperatively reinforcing an entity of the nickel base composite material. The method has the following advantages: parameters of the 3D printing technology are controllable, so that the manufacturing of parts with random three-dimensional shapes can be realized; through the cooperative reinforcing effect of the multielement transition interface and the reinforced particles, the plasticity and the toughness are improved when reinforcing the material strength and hardness; and the multielement transition interface between the reinforced phase and the basal body enables the reinforced phase and the basal body to be excellent in bonding performance, so that the crack initiation and expansion tendency is reduced, and the capacity of bearing a certain load is achieved.

Description

technical field [0001] The invention belongs to the technical field of reinforced manufacturing of nickel-based composite materials, and in particular relates to a method for preparing multi-element transition interface synergistically reinforced nickel-based composite materials by 3D printing. Background technique [0002] Inconel718 alloy maintains good high-temperature comprehensive performance, high-temperature corrosion resistance, high-temperature oxidation resistance, high-temperature fatigue resistance and thermal process performance in service environments up to about 700 °C, and is widely used in aerospace, nuclear industry, petroleum, chemical industry, etc. In the field, such as turbine disks, turbine blades, guide vanes, high-pressure compressor disks and combustion chambers in gas turbines. In recent years, with the rapid development of science and technology, aerospace and other industries have gradually increased the requirements for the service performance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y10/00B33Y70/00C22C32/00C22C1/05C22C1/10
CPCC22C1/05C22C1/10C22C32/0052B22F10/00B22F10/34B22F10/36B22F10/28B22F10/366B22F10/368B22F10/32B22F10/80Y02P10/25
Inventor 顾冬冬荣婷戴冬华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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