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Additive manufacturing method of functional composite honeycomb material

A technology of honeycomb materials and functional materials, which is applied in the field of additive manufacturing, can solve the problems that the additive manufacturing process needs to be explored urgently, and achieve the effect of less defects, tight integration, and optimized mechanical properties.

Active Publication Date: 2019-08-27
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above studies are all aimed at the preparation of honeycomb materials, but the preparation process of functional composite honeycomb materials, especially the additive manufacturing process, needs to be explored urgently

Method used

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  • Additive manufacturing method of functional composite honeycomb material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Two alloy powders take Q235 and TC4 alloy (steel and titanium alloy) as examples. Among them, Q235 has excellent comprehensive mechanical properties, while TC4 alloy has excellent corrosion resistance and high temperature resistance. The composite honeycomb material composed of Q235 (base layer) and TC4 alloy (functional material layer) has excellent mechanical properties, corrosion resistance and high temperature resistance, and has great application value in the engineering field. According to the stress relief annealing process parameters of the substrate Q235 (Yuan Hongzhi, Feng Xiaoyu. Research on stress relief annealing process parameters[J]. Heat Treatment Technology and Equipment, 2014,35(2):48-50.), the printed honeycomb material The heating rate of 70~80℃ / h is heated to 550℃~650℃, the holding time is 3~5h, and the cooling rate of 60~80℃ / h is cooled to 300℃ with the furnace and then air cooled.

[0032] (1) Use metal 3D printing equipment and coaxial powder feedin...

Embodiment 2

[0037] Two alloy powders take Q235 and IN625 alloy (steel and high temperature alloy) as examples. Among them, Q235 has excellent comprehensive mechanical properties, and IN625 alloy has excellent high temperature resistance. The composite honeycomb material composed of Q235 (base layer) and IN625 alloy (functional material layer) has excellent mechanical properties and high temperature resistance, and has great application value in the engineering field. According to the stress relief annealing process parameters of the base material Q235, the printed honeycomb material is heated to 550°C to 650°C at a heating rate of 70 to 80°C / h, and the holding time is selected to be 3 to 5 hours, and cooling at 60 to 80°C / h The speed is cooled to 300℃ with the furnace and then air cooled.

[0038] (1) Using metal 3D printing equipment and coaxial powder feeding method, print the first layer: first print the base layer in the honeycomb structure with Q235 alloy powder, and the expected printi...

Embodiment 3

[0043] The two alloy powders take H65 and TC4 alloy (copper-zinc alloy and titanium alloy) as examples. Among them, H65 has excellent plasticity and welding properties, while TC4 alloy has excellent high temperature resistance and corrosion resistance. The composite honeycomb material composed of H65 (base layer) and TC4 alloy (functional material layer) has excellent molding processing, welding, high temperature resistance and corrosion resistance, and has great application value in the engineering field. According to the stress relief annealing process parameters of the substrate H65 (Zhou Shanyou. Heat treatment of copper alloy [J]. Shanghai Nonferrous Metals, 1985(2): 54-57.), heat the printed honeycomb material to 260~280℃, and keep it warm The time is 1h, and the water is cooled to room temperature.

[0044] (1) Using metal 3D printing equipment and coaxial powder feeding method, print the first layer: first print the base layer in the honeycomb structure with H65 alloy pow...

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Abstract

The invention provides an additive manufacturing method of functional composite honeycomb material, and belongs to the technical field of additive manufacturing. In a printing process, two alloy powders with different materials are used for powder feeding and printing to prepare the functional composite honeycomb material, residual internal stress of the composite honeycomb material printing partis eliminated through a stress relief annealing heat treatment process, and the macroscopic mechanical property is improved. According to the three-layer functional composite honeycomb material prepared by the manufacturing method disclosed by the invention, original honeycomb material structure is improved, so that the structural performance of the honeycomb structure material is more stable, andthe three-layer functional composite honeycomb material is suitable for larger market demands.

Description

Technical field [0001] The invention relates to the field of additive manufacturing, in particular to a method for preparing a functional composite honeycomb material. Background technique [0002] Honeycomb material is a two-dimensional multicellular material, which has the characteristics of low density, low rigidity, and large compressive denaturation ability. In general, any metal material can be used to prepare the honeycomb. At present, aluminum alloys and titanium alloys are mostly used in metal honeycomb materials. Because these two alloys have the characteristics of low density, high specific strength, and corrosion resistance, the prepared honeycomb materials retain the original alloy With the excellent characteristics of the honeycomb material and the structure and mechanical properties of the honeycomb material, the metal honeycomb material is therefore used in various industrial sectors. [0003] At present, the most commonly used honeycomb material processing techno...

Claims

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Application Information

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IPC IPC(8): B22F3/11B22F7/02B22F3/24B33Y10/00B33Y80/00
CPCB22F3/11B22F7/002B22F7/02B22F3/24B33Y10/00B33Y80/00B22F2003/248
Inventor 孙中刚嵇书伟陈小龙张文书常辉
Owner NANJING UNIV OF TECH
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