CN112296353A - Preparation method of metal and high polymer material composite 3D printing wire - Google Patents
Preparation method of metal and high polymer material composite 3D printing wire Download PDFInfo
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- CN112296353A CN112296353A CN202011072949.4A CN202011072949A CN112296353A CN 112296353 A CN112296353 A CN 112296353A CN 202011072949 A CN202011072949 A CN 202011072949A CN 112296353 A CN112296353 A CN 112296353A
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- 238000010146 3D printing Methods 0.000 title claims abstract description 64
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 47
- 239000002184 metal Substances 0.000 title claims abstract description 38
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 239000002861 polymer material Substances 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 27
- 238000005245 sintering Methods 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 12
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000012188 paraffin wax Substances 0.000 claims abstract description 12
- 239000008117 stearic acid Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims 9
- 238000004321 preservation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229920002521 macromolecule Polymers 0.000 abstract 2
- 230000008021 deposition Effects 0.000 abstract 1
- 238000007639 printing Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000110 selective laser sintering Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Composite Materials (AREA)
- Structural Engineering (AREA)
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Abstract
The invention discloses a preparation method of a metal and high polymer material composite 3D printing wire, relates to the technical field of metal manufacturing, and is provided based on the problem of poor toughness of the existing metal 3D printing wire. The invention mixes the macromolecule connecting agent, the paraffin, the stearic acid and other components according to a certain proportion, fully and uniformly mixes the metal powder and the formula through an internal mixer, controls the toughness of the 3D printing wire by adjusting the proportion of the macromolecule connecting agent and the metal powder, extrudes and draws the prepared composite material by a single screw, and then prepares a metal finished product through a printing-degumming-sintering process. The invention has the advantages that: according to the invention, a metal fused deposition modeling method is adopted to prepare the 3D printing wire with the diameter of 1.75 +/-0.02 mm; tests prove that the blank obtained by carrying out melting treatment on the 3D printing wire prepared by the invention has good breaking strength and elongation, and the sintered blank has a smooth and crack-free surface.
Description
Technical Field
The invention relates to the technical field of metal manufacturing, in particular to a preparation method of a metal and high polymer material composite 3D printing wire.
Background
Now "3D printing" is very popular and is a popular vocabulary. Although 3D printing is a new concept, it is not a new technology, since research has been started by various research institutes at home and abroad since the eighties of the last century, and its professional terminology called "rapid prototyping" or "rapid manufacturing" (RP for short) is now also called "additive manufacturing", which is proposed from a special manufacturing mode of 3D printing.
At present, the mainstream methods for metal 3D printing include a three-dimensional printing process (3DP), selective laser sintering/melting (SLS/SLM), and the like. The three-dimensional printing technology (3DP), that is, the three-dimensional printing technology, is to connect a printer and a computer by using the principle of a common printer, to load raw materials into a machine body, to accumulate the raw materials layer by using a laser injector under the control of the computer, and to change a blueprint on the computer into a real object. The Selective Laser Sintering (SLS) process is formed using various powdered materials. Spreading material powder on the upper surface of the formed prototype or part, and flattening with a flattening roller; with high-strength CO2The laser scans the section of the layer of the forming piece on the newly laid new layer; sintering the material powder together under high intensity laser irradiation to obtain a new cross-sectional layer of the shaped part and connecting the shaped part below; after the sintering of one layer of section is finished, a new layer of material powder is laid, and after the material powder is compacted, the section of the lower layer is selectively sintered. Blowing off the floating paste on the surface by means of a fanThe powder can be used to obtain sintered prototype or parts. However, since the forming technology of various metal and alloy powder materials is not yet studied, the technical difficulty is high and the manufacturing cost is high.
Patent CN110273076A discloses a method for preparing an aluminum alloy wire for 3D printing of metals, which comprises the steps of batching → press forming → vacuum induction furnace melting → alloy casting → forging → hot rolling → wire drawing → continuous electrolytic polishing cleaning → heat treatment straightening. The problems with this technique are as follows: the prepared metal 3D printing wire has poor toughness.
Disclosure of Invention
The invention aims to solve the technical problem that the existing metal 3D printing wire is poor in toughness.
The invention adopts the following technical scheme to solve the technical problems:
the invention provides a preparation method of a metal and high polymer material composite 3D printing wire, which comprises the following steps:
(1) according to the mass ratio of 8:1-40:7, placing metal powder and a high polymer connecting agent into an internal mixer to be mixed until the stress is stable;
(2) sequentially adding paraffin and stearic acid into an internal mixer according to the mass ratio of 10:3-16:3, and uniformly mixing to obtain an internal mixing material;
(3) extruding the banburying material prepared in the step (2) into 3D printing wires through a single-screw extruder, and rolling a finished product;
(4) extruding and molding the 3D printing wire prepared in the step (3) through melting 3D printing equipment to prepare a blank;
(5) placing the blank prepared in the step (4) into an oven, slowly heating to 400 ℃, and preserving heat until the connecting agent in the product is completely decomposed to obtain a high-emission blank; weighing and calculating the high-discharging-rate probability of the product after discharging the high-discharging billet, wherein the weight loss part of the product is a component of a connecting agent;
(6) placing the high-emission blank prepared in the step (5) into a vacuum sintering furnace, and sintering for 2h at 1360-1400 ℃ to prepare a sintered blank;
(7) and (5) carrying out post-treatment on the sintered blank to obtain a qualified product.
The high-molecular connecting agent, the paraffin, the stearic acid and other components are mixed according to a certain proportion, the metal powder and the formula are fully and uniformly mixed by an internal mixer, the toughness of the 3D printing wire is controlled by adjusting the proportion of the high-molecular connecting agent and the metal powder, the composite material is prepared and then is extruded by a single screw for drawing, and the diameter of the composite material can be 1.75 +/-0.02 mm; tests prove that the blank of the 3D printing wire prepared by the invention after melting treatment has good breaking strength and elongation, and the sintered blank has smooth and crack-free appearance.
Preferably, the metal powder in the step (1) is 316L stainless steel powder.
Preferably, the particle size of the metal powder in the step (1) is 400 mesh.
Preferably, the polymer connecting agent in the step (1) is polypropylene.
Preferably, in the step (1), the reaction temperature is 185-.
Preferably, the extrusion temperature in the step (3) is 185-.
Preferably, the melting temperature in the step (3) is 200 ℃ and the extrusion speed is 100%.
Preferably, the temperature rise rate in the step (5) is 0.5 ℃/min.
Preferably, the temperature keeping time in the step (5) is 1-3 h.
Preferably, nitrogen protection gas is filled in the sintering process in the step (6).
The invention has the beneficial effects that: the high-molecular connecting agent, the paraffin, the stearic acid and other components are mixed according to a certain proportion, the metal powder and the formula are fully and uniformly mixed by an internal mixer, the toughness of the 3D printing wire is controlled by adjusting the proportion of the high-molecular connecting agent and the metal powder, the composite material is prepared and then is extruded by a single screw for drawing, and the diameter of the composite material can be 1.75 +/-0.02 mm; tests prove that the blank of the 3D printing wire prepared by the invention after melting treatment has good breaking strength and elongation, and the sintered blank has smooth and crack-free appearance.
Drawings
FIG. 1 is an appearance diagram of a sintered compact obtained by high-temperature sintering of a 3D print prepared in example 2 of the present invention;
fig. 2 is an appearance view of a sintered compact obtained by 3D printing and high-temperature sintering according to comparative example 1 of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the drawings and examples of the specification.
Test materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The specific techniques or conditions not specified in the examples can be performed according to the techniques or conditions described in the literature in the field or according to the product specification.
The polypropylene of the invention is of the China petrochemical F401 wiredrawing grade.
The paraffin wax of the invention has the model of 58 degrees of Kunlun solid paraffin wax.
The stearic acid of the present invention is Innescent stearic acid 1801.
Example 1
A preparation method of a metal and high polymer material composite 3D printing wire comprises the following steps:
(1) adding 800g of 316L stainless steel powder with the particle size of 400 meshes and 100g of polypropylene into an internal mixer, and mixing until the stress is stable, wherein the reaction temperature is 185 ℃, and the rotating speed is 150 r/min;
(2) sequentially adding 50g of paraffin and 15g of stearic acid into an internal mixer, and uniformly mixing to obtain an internal mixing material;
(3) extruding the banburying material prepared in the step (2) by a single-screw extruder to obtain 3D printing wires, and rolling, wherein the extrusion temperature is 190 ℃, and the rotating speed is 400 r/min;
(4) extruding and molding the metal printing wire by a melting 3D printing device, wherein the printing temperature is 200 ℃, the printing speed is 100%, and a blank is prepared;
(5) putting the blank prepared in the step (4) into an oven, heating to 400 ℃ at the speed of 0.5 ℃/min, and keeping the temperature for 2h until the connecting agent in the product is completely decomposed to obtain a high-emission blank;
(6) putting the high-emission blank prepared in the step (5) into a vacuum sintering furnace, introducing nitrogen protective gas, and sintering at 1380 ℃ for 2 hours to prepare a sintered blank;
(7) and (5) carrying out post-treatment on the sintered blank to obtain a qualified product.
The mechanical properties of the blank prepared in example 1 were tested according to national standard GB/T393.1-1997, the density of the sintered material was measured using the drainage density test standard, and the test results are shown in table 1, which shows that the 3D printing wire with a diameter of 1.75 ± 0.02mm can be prepared in this example, the breaking strength of the melt-processed blank of the prepared 3D printing wire was 8.5/N, the elongation was 3.9/%, and the sintered blank obtained by sintering the prepared 3D printing wire at high temperature had a smooth and crack-free appearance.
Table 1 shows the results of the mechanical properties test of the green compact and the density test of the sintered compact obtained in example 1
Example 2
A preparation method of a metal and high polymer material composite 3D printing wire comprises the following steps:
(1) adding 800g of 316L stainless steel powder with the particle size of 400 meshes and 140g of polypropylene into an internal mixer, and mixing until the stress is stable, wherein the reaction temperature is 190 ℃, and the rotating speed is 200 r/min;
(2) sequentially adding 50g of paraffin and 15g of stearic acid into an internal mixer, and uniformly mixing to obtain an internal mixing material;
(3) extruding the banburying material prepared in the step (2) by a single-screw extruder to obtain 3D printing wires, and rolling, wherein the extrusion temperature is 190 ℃, and the rotating speed is 400 r/min;
(4) extruding and molding the metal printing wire by a melting 3D printing device, wherein the printing temperature is 200 ℃, the printing speed is 100%, and a blank is prepared;
(5) putting the blank prepared in the step (4) into an oven, heating to 400 ℃ at the speed of 0.5 ℃/min, and keeping the temperature for 2h until the connecting agent in the product is completely decomposed to obtain a high-emission blank;
(6) putting the high-emission blank prepared in the step (5) into a vacuum sintering furnace, introducing nitrogen protective gas, and sintering at 1380 ℃ for 2 hours to prepare a sintered blank;
(7) and (3) carrying out post-treatment on the sintered blank to obtain a qualified product, as shown in figure 1.
The mechanical properties of the blank prepared in example 2 were tested according to national standard GB/T393.1-1997, the density of the sintered material was measured using the drainage density test standard, and the test results are shown in table 2, which shows that the 3D printing wire with a diameter of 1.75 ± 0.02mm can be prepared in this example, the breaking strength of the melt-processed blank of the prepared 3D printing wire was 12.5/N, the elongation of the melt-processed blank was 12.5/%, and the sintered blank obtained by sintering the prepared 3D printing wire at high temperature had a smooth and crack-free appearance.
Table 2 shows the results of the mechanical properties test of the green compact and the density test of the sintered compact obtained in example 2
Example 3
A preparation method of a metal and high polymer material composite 3D printing wire comprises the following steps:
(1) adding 800g of 316L stainless steel powder with the particle size of 400 meshes and 100g of polypropylene into an internal mixer, and mixing until the stress is stable, wherein the reaction temperature is 190 ℃, and the rotating speed is 200 r/min;
(2) sequentially adding 80g of paraffin and 15g of stearic acid into an internal mixer, and uniformly mixing to obtain an internal mixing material;
(3) extruding the banburying material prepared in the step (2) by a single-screw extruder to obtain 3D printing wires, and rolling, wherein the extrusion temperature is 190 ℃, and the rotating speed is 400 r/min;
(4) extruding and molding the metal printing wire by a melting 3D printing device, wherein the printing temperature is 200 ℃, the printing speed is 100%, and a blank is prepared;
(5) putting the blank prepared in the step (4) into an oven, heating to 400 ℃ at the speed of 0.5 ℃/min, and keeping the temperature for 2h until the connecting agent in the product is completely decomposed to obtain a high-emission blank;
(6) putting the high-emission blank prepared in the step (5) into a vacuum sintering furnace, introducing nitrogen protective gas, and sintering at 1380 ℃ for 2 hours to prepare a sintered blank;
(7) and (5) carrying out post-treatment on the sintered blank to obtain a qualified product.
The mechanical properties of the blank prepared in example 3 were tested according to national standard GB/T393.1-1997, the density of the sintered material was measured using the drainage density test standard, and the test results are shown in table 3, which shows that the 3D printing wire with a diameter of 1.75 ± 0.02mm can be prepared in this example, the breaking strength of the melt-processed blank of the prepared 3D printing wire was 12.5/N, the elongation was 5.5/%, and the sintered blank obtained by sintering the prepared 3D printing wire at high temperature had a smooth and crack-free appearance.
Table 3 shows the results of the mechanical properties test of the green compact and the density test of the sintered compact obtained in example 3
Comparative example 1
Adding 800g of 316L stainless steel powder with the particle size of 400 meshes and 100g of polypropylene into an internal mixer, mixing until the stress is stable, wherein the reaction temperature is 190 ℃ and the rotating speed is 200r/min to prepare a mixture, extruding the mixture by a single-screw extruder to form 3D printing wires, and rolling, wherein the extrusion temperature is 190 ℃ and the rotating speed is 400 r/min; extruding and molding the metal printing wire by a melting 3D printing device, wherein the printing temperature is 200 ℃, the printing speed is 100%, and a blank is prepared; putting the blank into an oven, heating to 400 ℃ at the speed of 0.5 ℃/min, and keeping the temperature for 2h until the connecting agent in the product is completely decomposed to obtain a high-discharge blank; and finally, placing the high-emission blank into a vacuum sintering furnace, and sintering at 1380 ℃ for 2h to obtain a sintered blank, as shown in figure 2.
Carrying out mechanical property detection on the blank prepared in the comparative example 1 according to national standard GB/T393.1-1997; the density of the sintered compact was measured, and the results are shown in table 4, which indicates that the comparative example uses only the existing metal powder as the raw material, but does not add paraffin and stearic acid, and that the melt-processed preform of the 3D printing wire obtained through experimental verification has a breaking strength difference of only 5.6/N and an elongation difference of only 2.1/%, and as shown in fig. 2, the sintered compact obtained through high-temperature sintering of the 3D printing wire has rough surface and slight cracks.
Table 4 shows the results of the mechanical property test of the blank and the density test of the sintered compact obtained in comparative example 1
In conclusion, the invention can be seen that the high-molecular connecting agent, the paraffin, the stearic acid and other components are prepared according to a certain proportion, the metal powder and the formula are fully and uniformly mixed by the internal mixer, the toughness of the 3D printing wire is controlled by adjusting the proportion of the high-molecular connecting agent and the metal powder, the composite material is prepared and then is extruded and drawn by a single screw, and the diameter of the composite material can be 1.75 +/-0.02 mm; tests prove that the obtained 3D printing wire melting-processed blank has good breaking strength and elongation, and the sintered blank has smooth and crack-free appearance.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and various process schemes having no substantial difference from the concept of the present invention are within the protection scope of the present invention.
Claims (10)
1. A preparation method of a metal and high polymer material composite 3D printing wire is characterized by comprising the following steps:
(1) according to the mass ratio of 8:1-40:7, placing metal powder and a high polymer connecting agent into an internal mixer to be mixed until the stress is stable;
(2) sequentially adding paraffin and stearic acid into an internal mixer according to the mass ratio of 10:3-16:3, and uniformly mixing to obtain an internal mixing material;
(3) extruding the banburying material prepared in the step (2) into 3D printing wires through a single-screw extruder, and rolling a finished product;
(4) extruding and molding the 3D printing wire prepared in the step (3) through melting 3D printing equipment to prepare a blank;
(5) placing the blank prepared in the step (4) into an oven, slowly heating to 400 ℃, and preserving heat until the connecting agent in the product is completely decomposed to obtain a high-emission blank;
(6) placing the high-emission blank prepared in the step (5) into a vacuum sintering furnace, and sintering for 2h at 1360-1400 ℃ to prepare a sintered blank;
(7) and (5) carrying out post-treatment on the sintered blank to obtain a qualified product.
2. The preparation method of the metal and polymer material composite 3D printing wire according to claim 1, characterized in that: the metal powder in the step (1) is 316L stainless steel powder.
3. The preparation method of the metal and polymer material composite 3D printing wire according to claim 1, characterized in that: the particle size of the metal powder in the step (1) is 400 meshes.
4. The preparation method of the metal and polymer material composite 3D printing wire according to claim 1, characterized in that: the polymer connecting agent in the step (1) is polypropylene.
5. The preparation method of the metal and polymer material composite 3D printing wire according to claim 1, characterized in that: in the step (1), the reaction temperature is 185-195 ℃, and the rotation speed is 150-200 r/min.
6. The preparation method of the metal and polymer material composite 3D printing wire according to claim 1, characterized in that: the extrusion temperature in the step (3) is 185-195 ℃, and the rotation speed is 400-500 r/min.
7. The preparation method of the metal and polymer material composite 3D printing wire according to claim 1, characterized in that: in the step (3), the melting temperature is 200 ℃, and the extrusion speed is 100%.
8. The preparation method of the metal and polymer material composite 3D printing wire according to claim 1, characterized in that: the heating rate in the step (5) is 0.5 ℃/min.
9. The preparation method of the metal and polymer material composite 3D printing wire according to claim 1, characterized in that: the heat preservation time in the step (5) is 1-3 h.
10. The preparation method of the metal and polymer material composite 3D printing wire according to claim 1, characterized in that: and (4) introducing nitrogen protection gas in the sintering process in the step (6).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699454A (en) * | 2021-08-30 | 2021-11-26 | 江苏科技大学 | 3D printing product and preparation method thereof |
| NL2033613B1 (en) * | 2022-07-13 | 2024-01-25 | Univ Kunming Science & Technology | Preparation method of filament for additive manufacturing |
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