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Composite powder as well as preparation method and application of composite powder

A composite powder and drug core wire technology, applied in transportation and packaging, metal processing equipment, coating and other directions, can solve the problems of increasing the complexity of the inorganic-organic composite powder preparation process, and achieve low cost, process flow and, The effect of short process flow

Active Publication Date: 2018-07-03
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This undoubtedly increases the complexity of the inorganic-organic composite powder preparation process

Method used

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  • Composite powder as well as preparation method and application of composite powder
  • Composite powder as well as preparation method and application of composite powder
  • Composite powder as well as preparation method and application of composite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, the coat of the drug core wire material is stainless steel, and the drug core is SiO 2 Particles are prepared by arc spraying process, and the composite powder is collected in the atmospheric environment. The specific steps are: adding SiO with a weight ratio of 20% to the stainless steel strip 2 Particles, prepare a drug core wire with a diameter of 1.97mm, and use arc spraying. The specific parameters are: current 120A, voltage 40V, compressed air pressure 0.8MPa, prepare composite powder, and collect the prepared composite powder in the atmosphere;

[0038] Carry out following performance test to the coating of above-mentioned preparation:

[0039] (1) Observation of the cross-sectional microstructure of the composite powder: the microscopic morphology of the particle cross-section was detected by a field emission scanning electron microscope (SEM), and it was confirmed that the particles contained SiO 2 .

[0040] (2) Observation of the surface...

Embodiment 2

[0042] In this embodiment, the coat of the drug core wire material is stainless steel, and the drug core is polytetrafluoroethylene particles and SiO 2 The particles are prepared by arc spraying process, and the atmosphere protects the environment to collect the composite powder. The specific steps are: adding 4% polytetrafluoroethylene particles and 16% SiO in the stainless steel strip 2 Particles, prepare a drug core wire with a diameter of 1.97mm, and use arc spraying. The specific parameters are: current 120A, voltage 40V, nitrogen pressure 0.8MPa, prepare composite powder, and collect the prepared composite powder in an atmosphere protected environment;

[0043] Carry out following performance test to the coating of above-mentioned preparation:

[0044] (1) Observation of the cross-sectional microstructure of the composite powder: the microscopic morphology of the particle cross-section was detected by a field emission scanning electron microscope (SEM), and it was confir...

Embodiment 3

[0047] In this example, the coat of the drug core wire is made of stainless steel, and the drug core is made of polyperfluoroethylene propylene particles and aluminum particles. It is prepared by arc spraying process, and the composite powder is collected in an atmospheric environment. The specific steps are: adding a weight ratio of 10% FEP particles and 10% micron aluminum powder were used to prepare a drug core wire material with a diameter of 1.97mm, which was sprayed by electric arc. The specific parameters were: current 120A, voltage 30V, compressed air pressure 1.4MPa, prepared Composite powder, the prepared composite powder is collected in the atmospheric environment;

[0048] Carry out following performance test to the coating of above-mentioned preparation:

[0049] (1) Observation of the cross-sectional microstructure of the composite powder: The microscopic morphology of the particle cross-section was detected by a field emission scanning electron microscope (SEM),...

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Abstract

The invention discloses a preparation method of composite powder. The preparation method comprises the steps that flux-cored wire is used as a raw material, then the flux-cored wire is melted to formliquid drops through thermal spraying, and the liquid drops are directly sprayed in a vacuum environment or a gas atmosphere to condense to form the composite powder. According to the preparation method of the composite powder, the raw material is simple in composition, and the process is simple and convenient; the prepared composite powder is in a spherical shape and has a core-shell structure, the particle size ranges from 10 microns to 100 microns, and the particle size range can be adjusted by changing the preparation process parameters; and the composite powder is suitable for 3D printingtechnology.

Description

technical field [0001] The invention relates to the field of preparation of composite materials, in particular to a composite powder and its preparation method and application. Background technique [0002] 3D printing, a type of rapid prototyping technology, is based on digital model files and uses bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. Its manufacturing is fast, and it can fully reproduce the three-dimensional effect, so that product design and mold production can be carried out simultaneously, and the integration of design and manufacturing can be realized. At present, the materials that can be used on 3D printing equipment include metal materials, inorganic powder materials, ceramic materials, polymer materials and so on. [0003] Due to their excellent mechanical properties and physical and chemical properties, composite materials have always been the focus of scientific research and industrial applications...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/06C23C4/131B33Y70/00
CPCB22F9/06B33Y70/00B22F1/065
Inventor 所新坤黄晶房立家刘奕周平龚永锋李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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