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Polymer composite stainless steel 3D printing material, preparation method and preparation method of part

A 3D printing, stainless steel technology, applied in the field of 3D printing of metal parts, can solve the problems of expensive printing equipment, harmful to the health of operators, and potential safety hazards, so as to save the cycle and cost of mold opening, less environmental pollution, and low maintenance costs. Effect

Active Publication Date: 2020-11-17
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The parts printed by this technology have the same performance as the parts processed by traditional technology, but the printing equipment is expensive, the printing process needs the protection of inert gas, and has high requirements on the laboratory environment, and the raw material is metal powder, which is not only harmful to the health of the operator , and after reaching a certain concentration, it is easy to burn and cause an explosion under the fire source, static electricity and frictional collision, which poses a safety hazard

Method used

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  • Polymer composite stainless steel 3D printing material, preparation method and preparation method of part
  • Polymer composite stainless steel 3D printing material, preparation method and preparation method of part

Examples

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Embodiment 1

[0038] This embodiment 1 discloses a method based on fused deposition modeling (FDM) technology, using polymer composite stainless steel 3D printing materials to prepare metal parts, the specific process is as follows:

[0039] A1: Put the stainless steel powder and the polymer binder at a volume ratio of 1.5:1 in a high-speed mixer and mix evenly, while heating while mixing, the heating temperature is 162°C-165°C, the mixing time is 160min, and then cooled to room temperature to obtain Polymer clad stainless steel mixture;

[0040] The stainless steel powder is made by mixing the following components by mass percentage:

[0041] Cr: 17.2%, Ni: 5.4%, Cu: 3.3%, Nb: 0.17%, Si: 0.64%, Fe: 73.29%;

[0042] The median particle size of the stainless steel powder is 8 μm, the bulk density is 40%, the tap density is 55%, and the powder particles are spherical or nearly spherical;

[0043] The polymer binder is made by mixing the following components by mass percentage:

[0044] Pol...

Embodiment 2

[0056] The second embodiment discloses a method for preparing metal parts based on fused deposition modeling (FDM) technology using polymer composite stainless steel 3D printing materials. The specific process is as follows:

[0057] B1: Put stainless steel powder and polymer binder at a volume ratio of 1.6:1 in a high-speed mixer and mix evenly, while heating while mixing, the heating temperature is 167°C-172°C, the mixing time is 150min, and then cooled to room temperature to obtain Polymer clad stainless steel mixture;

[0058] The stainless steel powder is made by mixing the following components by mass percentage:

[0059] Cr: 16.1%, Ni: 4.3%, Cu: 4.0%, Nb: 0.26%, Si: 0.62%, Fe: 74.72%;

[0060] The median particle size of the stainless steel powder is 8 μm, the bulk density is 45%, the tap density is 66%, and the powder particles are spherical or nearly spherical;

[0061] The polymer binder is made by mixing the following components by mass percentage:

[0062] Polyo...

Embodiment 3

[0074] This embodiment three discloses a method for preparing metal parts based on fused deposition modeling (FDM) technology using polymer composite stainless steel 3D printing materials. The specific process is as follows:

[0075] C1: Mix stainless steel powder and polymer binder in a high-speed mixer at a volume ratio of 1.8:1, and heat while mixing. The heating temperature is 175°C-180°C, the mixing time is 120min, and then cooled to room temperature to obtain Polymer clad stainless steel mixture;

[0076] The stainless steel powder is made by mixing the following components by mass percentage:

[0077] Cr: 15.6%, Ni: 5.8%, Cu: 4.8%, Nb: 0.43%, Si: 0.66%, Fe: 72.71%;

[0078] The median particle size of the stainless steel powder is 8 μm, the bulk density is 50%, the tap density is 78%, and the powder particles are spherical or nearly spherical;

[0079] The polymer binder is made by mixing the following components by mass percentage:

[0080] Polyoxymethylene: 35.5%, ...

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Abstract

The invention discloses a polymer composite stainless steel 3D printing material, a preparation method and a preparation method of a part. The 3D printing material is a wire formed through extruding of a mixture of a high-molecular polymer and stainless steel powder. According to the preparation method of the part, the 3D printing material is heated and melted in a nozzle of a hot extruding machine, the nozzle moves along the section contour and the filling track of the part, meanwhile, the melted material is extruded, the material is rapidly solidified and is coagulated with surrounding materials, and thus the part blank is obtained; and then the high-molecular polymer in the part is removed through degreasing and sintering post-treatment processes, and the stainless steel material is reserved. The 3D printing material is used for fused deposition modeling and is filamentous, the preparation process is simple and safe, and the formed part is excellent in performance.

Description

technical field [0001] The invention belongs to the technical field of 3D printing of metal parts, and in particular relates to a polymer composite stainless steel 3D printing material, a preparation method and a part preparation method. Background technique [0002] 3D printing uses the discrete-stacking principle to construct objects by layer-by-layer stacking. Compared with traditional processes, it is not limited by molds, can construct complex shapes, and saves mold opening cycle and cost. It is a rapid prototyping technology. . 3D printing technology started in the mid-to-late 1880s. It began to print prototypes and models, and later developed molds. After 2010, with the continuous development of printing technology and the continuous updating of printing materials, it has been applied to 3D printing applications for production purposes are gradually occupying a dominant position, especially metal 3D printing. The parts manufactured have superior performance and can m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/20B22F3/105B22F1/00B33Y70/10C22C38/02C22C38/42C22C38/48
CPCB22F3/20C22C38/42C22C38/48C22C38/02B33Y70/10B22F1/103B22F1/102Y02P10/25
Inventor 张薇宋庆军井琦于洪阳李文平邓飞
Owner CHINA FIRST AUTOMOBILE
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