CN114622148A - Metal powder for micro-jet bonding and printing method thereof - Google Patents
Metal powder for micro-jet bonding and printing method thereof Download PDFInfo
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- CN114622148A CN114622148A CN202210171594.7A CN202210171594A CN114622148A CN 114622148 A CN114622148 A CN 114622148A CN 202210171594 A CN202210171594 A CN 202210171594A CN 114622148 A CN114622148 A CN 114622148A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/10—Formation of a green body
- B22F10/14—Formation of a green body by jetting of binder onto a bed of metal powder
-
- 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
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/04—Light metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/04—Light metals
- C22C49/06—Aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/08—Iron group metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/10—Refractory metals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
A metal powder for a micro-jet bonding method and a printing method thereof belong to the technical field of additive manufacturing and are used for solving the problems of cracking, powder pushing and the like of metal powder printing, and the metal powder comprises 96% -99.5% of 0-25 mu m metal powder and 0.5% -4% of 400-700-mesh metal fibers, wherein the metal powder and the metal fibers are made of the same material. Preferably, the particle size of the metal powder is not less than 4 μm. The granularity of the metal powder is controlled to be not less than 4 mu m, so that the reduction of powder fluidity caused by excessive fine powder in the metal powder can be effectively prevented, and the metal powder particles with a repose angle of not more than 45 degrees and a sphericity of not less than 0.85 are adopted. By controlling the proportion and the granularity of the metal powder and the metal fiber of the metal powder for printing by the micro-jet bonding method, the problems that the process requirement of the metal powder printing by adopting the micro-jet bonding technology is high, and the powder spreading surface is easy to crack, push powder, dislocate, deform and have poor uniformity are solved.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to powder for additive manufacturing.
Background
3D printing is an additive manufacturing technique that obtains three-dimensional parts by adding material layer by layer. Commonly seen 3D printed materials are wires, powdered metals, plastics, ceramics, etc. Among many materials for 3D printing, a metal material may be used as a terminal material.
At present, the 3D printing method of metal materials mainly adopts selective laser sintering and direct energy deposition technologies, and the method comprises the steps of enabling metal powder to pass through a powder supply system, using a scraper or a roller to pave the powder, then slowly scanning and melting the metal through equipment such as laser beams and electron beams to achieve the purpose of carving images, and thus repeatedly punching the whole product. The printing equipment has high overall cost, and the powder used as the raw material also needs to be spherical powder, so that the printing efficiency is low.
The micro-spraying bonding method is that a spray head is utilized to spray bonding agent to paved metal powder according to a certain path, and the powder at a certain position is bonded to form a layer of the three-dimensional component outline; then laying a new layer of metal powder, and carrying out spray bonding; thus, a three-dimensional bonding blank can be obtained by bonding and superposing the layers. The micro-jet bonding method has the advantages of low cost, simple process and good application prospect; however, for the 3D printing process of micro-jet bonding, the printing of the product is realized by integrating powder spreading and ink jetting, which causes problems of cracking, powder pushing, dislocation, deformation and the like in the printing process, which are easily caused by improper matching of powder materials and poor process control in the forming process, resulting in printing failure and finally causing product performance defects and being unusable.
Disclosure of Invention
In view of the problems of easy cracking, powder pushing, dislocation, deformation and the like in the printing process caused by improper material matching or high process control requirement in the printing process of the existing micro-jet bonding method, the metal powder for the micro-jet bonding method and the printing method thereof need to be provided, and the printing quality, the printing efficiency and the printing stability of the metal powder are improved.
The metal powder for the micro-jet bonding method comprises 96-99.5% of 0-25 mu m metal powder and 0.5-4% of 400-700 mesh metal fibers, wherein the metal powder and the metal fibers are made of the same material.
Preferably, the particle size of the metal powder is not less than 4 μm. The particle size of the metal powder is controlled to be not less than 4 mu m, so that the problems that the powder flowability is reduced due to excessive fine powder content in the metal powder and the metal powder cannot be uniformly mixed in the mixing process can be effectively prevented, and in order to ensure the flowability of the metal powder, the metal powder particles with the repose angle of not more than 45 degrees and the sphericity of not less than 0.85 can be adopted.
Preferably, the material of the metal powder may be one of stainless steel, die steel, copper alloy, high temperature alloy, titanium alloy, aluminum alloy and magnesium alloy.
Preferably, the metal fiber may be one of stainless steel, die steel, copper alloy, high temperature alloy, titanium alloy, aluminum alloy and magnesium alloy. The metal fibers are used for ensuring the stability of a product to be printed in the printing process and preventing the powder spreading surface of the printing mechanism from being dislocated or cracked due to the pushing force in the powder spreading process; that is, the metal fiber plays a role in connecting and pulling the metal powder on the powder spreading surface, so that the whole powder spreading surface is not easy to partially follow up.
A method of printing metal powder for micro-jet bonding, comprising:
s01, loading the metal powder for micro-injection bonding into a printing mechanism of printing equipment;
s02, setting the thickness of the printing layer of the printing equipment to be 0.03-0.06 mm;
s03, printing the product to be printed according to the slice information of the product to be printed and the set printing layer thickness;
s04, setting the temperature of irradiation on the powder spreading surface to be 40-55 ℃;
s05, the adding amount of the binder is 40-80% of the pores of the metal powder on the current powder paving surface. The ratio of the sprayed binder to the pores of the metal powder in the powder paving surface affects the volatilization rate of the solvent in the binder, and the solvent in the binder volatilizes too fast or too slow to affect the bonding strength of the powder paving surface, so that incomplete bonding of the powder paving surface is caused, and the powder paving surface is subjected to powder pushing or cracking.
Preferably, the S04 is used for irradiating the powder spreading surface, the infrared lamp is arranged above the powder spreading surface, and the adjustment of the temperature irradiated on the powder spreading surface is realized by adjusting the intensity of the infrared lamp; the irradiation time of each layer of powder laying surface is 10-40 s, the irradiation temperature is 40-55 ℃, and the specific time and the irradiation temperature are determined according to the layer thickness. The irradiation time and the irradiation temperature both influence the solvent volatilization speed in the binder, and the binder volatilizes too fast or too slow to cause the bonding strength of the powder paving surface not to reach the standard, thereby causing the problem that the powder paving surface has powder pushing or cracking.
The technical scheme of the invention has the beneficial effects that: by controlling the proportion and the granularity of the metal powder and the metal fiber of the metal powder for printing by the micro-jet bonding method, the problems that the process requirement of the metal powder printing by adopting the micro-jet bonding technology is high, and the powder spreading surface is easy to crack, push powder, dislocate, deform and have poor uniformity are solved. And by controlling the thickness of the powder spreading layer, baking the powder spreading surface and other processes, the process quality of the powder spreading surface is improved, and the probability that the powder spreading surface is possibly pushed, cracked, misplaced and other problems is reduced.
Detailed Description
In order to more clearly illustrate the technical solutions of the present invention, the technical solutions of the present invention are described in detail with reference to the following embodiments, and it is obvious that the following descriptions are some exemplary embodiments of the present invention, and it is obvious for those skilled in the art that other solutions can be obtained according to these embodiments without creative efforts.
The first embodiment is as follows:
a metal powder for use in a micro spray bonding process comprising 98% of 316L stainless steel powder having a particle size of 4.5 μm and 2% of 316L stainless steel fibers having a particle size of 400 mesh, and wherein the particles in the 316L stainless steel powder have a repose angle of 38 degrees and a sphericity of 0.88.
A method of printing metal powder for micro-jet bonding, comprising:
s01, loading the metal powder for micro-injection bonding into a printing mechanism of printing equipment;
s02, setting the printing layer thickness of the printing apparatus to 0.04 mm;
s03, printing the product to be printed according to the slice information of the product to be printed and the set printing layer thickness;
s04, setting the temperature of the infrared lamp irradiating on the powder spreading surface to be 45 ℃ and the irradiation time to be 15S;
and S05, the adding amount of the binder is 60% of the pores of the metal powder on the current powder paving surface.
In the printing process, all the powder spreading surfaces have printing defects such as cracking, powder pushing and the like.
Example two:
a metal powder for a micro spray bonding method comprising 97% of 18Ni300 die steel powder having a particle size of 4.8 μm and 3% of 18Ni300 die steel fibers having a particle size of 600 mesh, and wherein the 18Ni300 die steel powder has a particle with a repose angle of 40 degrees and a sphericity of 0.89.
A method of printing metal powder for micro-jet bonding, comprising:
s01, loading the metal powder for micro-injection bonding into a printing mechanism of printing equipment;
s02, setting a printing layer thickness of the printing apparatus to 0.03 mm;
s03, printing the product to be printed according to the slice information of the product to be printed and the set printing layer thickness;
s04, setting the temperature of the infrared lamp irradiating on the powder spreading surface to be 40 ℃ and the irradiation time to be 20S;
and S05, adding the binder in an amount which is 55% of the pores of the metal powder on the current powder paving surface.
In the printing process, all the powder spreading surfaces have printing defects such as cracking, powder pushing and the like.
Example three:
a metal powder for a micro spray bonding process comprising 99.5% of copper powder having a particle size of 5.0 μm and 0.5% of copper fiber having a particle size of 450 mesh, and wherein the particles in the copper powder have a repose angle of 45 degrees and a sphericity of 0.88.
A method of printing metal powder for micro-jet bonding, comprising:
s01, loading the metal powder for micro-injection bonding into a printing mechanism of printing equipment;
s02, setting a printing layer thickness of the printing apparatus to 0.05 mm;
s03, printing the product to be printed according to the slice information of the product to be printed and the set printing layer thickness;
s04, setting the temperature of the infrared lamp irradiating on the powder spreading surface to be 50 ℃ and the irradiation time to be 18S;
s05, the adding amount of the binder is 65% of the pores of the metal powder on the current powder paving surface.
In the printing process, all the powder spreading surfaces have printing defects such as cracking, powder pushing and the like.
Example four:
a metal powder for a micro spray bonding method comprising 98.5% of silver powder having a particle size of 4.3 μm and 1.5% of silver fiber having a particle size of 700 mesh, and wherein the silver powder has particles having a repose angle of 42 degrees and a sphericity of 0.85.
A method of printing metal powder for micro-jet bonding, comprising:
s01, loading the metal powder for micro-injection bonding into a printing mechanism of printing equipment;
s02, setting the printing layer thickness of the printing apparatus to 0.04 mm;
s03, printing the product to be printed according to the slice information of the product to be printed and the set printing layer thickness;
s04, setting the temperature of the infrared lamp irradiating on the powder spreading surface to be 55 ℃ and the irradiation time to be 14S;
s05, the addition amount of the binder is 58% of the pores of the metal powder of the current powder paving surface.
In the printing process, all the powder spreading surfaces have printing defects such as cracking, powder pushing and the like.
Example five:
a metal powder for a micro spray bonding method comprising 98.5% of tungsten powder having a particle size of 4.0 μm and 1.5% of tungsten fibers having a particle size of 400 mesh, and wherein the particles in the tungsten powder have a repose angle of 38 degrees and a sphericity of 0.87.
A method of printing metal powder for micro-jet bonding, comprising:
s01, loading the metal powder for micro-injection bonding into a printing mechanism of printing equipment;
s02, setting the printing layer thickness of the printing apparatus to 0.03 mm;
s03, printing the product to be printed according to the slice information of the product to be printed and the set printing layer thickness;
s04, setting the temperature of the infrared lamp irradiating on the powder spreading surface to be 48 ℃ and the irradiation time to be 30S;
and S05, the adding amount of the binder is 60% of the pores of the metal powder on the current powder paving surface.
In the printing process, all the powder spreading surfaces have printing defects such as cracking, powder pushing and the like.
The above embodiment is only a description of a typical application of the technical solution of the present invention, and may be reasonably expanded without creative efforts.
Claims (7)
1. The metal powder for the micro-jet bonding method is characterized by comprising 96% -99.5% of 0-25 mu m metal powder and 0.5% -4% of 400-700 mesh metal fibers, wherein the metal powder and the metal fibers are made of the same material.
2. The metal powder for micro-spray bonding according to claim 1, wherein the particle size of the metal powder is not less than 4 μm.
3. The metal powder for microjet bonding as claimed in claim 2, wherein the particles in the metal powder have a repose angle of not more than 45 degrees and a sphericity of not less than 0.85.
4. The metal powder for microjet bonding as claimed in claim 3, wherein the material of the metal powder and the metal fiber is one of steel, die steel, copper alloy, superalloy, titanium alloy, aluminum alloy, and magnesium alloy.
5. A method of printing metal powder for microjet bonding as claimed in claim 4, comprising:
s01, loading the metal powder for micro-injection bonding into a printing mechanism of printing equipment;
s02, setting the thickness of the printing layer of the printing equipment to be 0.03-0.06 mm;
s03, printing the product to be printed according to the slice information of the product to be printed and the set printing layer thickness;
s04, setting the temperature of irradiation on the powder spreading surface to be 40-55 ℃;
s05, the addition of the binder is 40-80% of the pores of the metal powder of the current powder paving surface.
6. The method for printing metal powder for a micro-spray bonding method according to claim 5, wherein the S04 for irradiating the powder spreading surface is an infrared lamp disposed above the powder spreading surface.
7. The method for printing metal powder for microjet bonding as claimed in claim 6, wherein the irradiation time of each powder-spreading surface is 10s to 40s and the irradiation temperature is 40 ℃ to 55 ℃.
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| CN202210171594.7A CN114622148B (en) | 2022-02-26 | 2022-02-26 | Printing method of metal powder for micro-jet bonding method |
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| CN202210171594.7A CN114622148B (en) | 2022-02-26 | 2022-02-26 | Printing method of metal powder for micro-jet bonding method |
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