CN114535599A - Closed-cell foam steel and preparation method thereof - Google Patents
Closed-cell foam steel and preparation method thereof Download PDFInfo
- Publication number
- CN114535599A CN114535599A CN202111670074.2A CN202111670074A CN114535599A CN 114535599 A CN114535599 A CN 114535599A CN 202111670074 A CN202111670074 A CN 202111670074A CN 114535599 A CN114535599 A CN 114535599A
- Authority
- CN
- China
- Prior art keywords
- powder
- closed
- cell foam
- laser
- foam steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 239000006260 foam Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 101
- 238000000034 method Methods 0.000 claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 claims abstract description 29
- 238000000498 ball milling Methods 0.000 claims abstract description 21
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 17
- 238000002844 melting Methods 0.000 claims abstract description 17
- 230000008018 melting Effects 0.000 claims abstract description 17
- 239000011812 mixed powder Substances 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 15
- 230000000996 additive effect Effects 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000000151 deposition Methods 0.000 claims abstract description 7
- 230000008021 deposition Effects 0.000 claims abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 28
- 229910052786 argon Inorganic materials 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000010309 melting process Methods 0.000 claims description 2
- 238000005056 compaction Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 7
- 238000005266 casting Methods 0.000 abstract description 4
- 239000011777 magnesium Substances 0.000 description 11
- 229910001220 stainless steel Inorganic materials 0.000 description 11
- 239000010935 stainless steel Substances 0.000 description 11
- 239000011148 porous material Substances 0.000 description 10
- 229910000984 420 stainless steel Inorganic materials 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
Classifications
-
- 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
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- 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
- B22F10/20—Direct sintering or melting
- B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
-
- 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
- B22F10/30—Process control
- B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
-
- 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
- B22F3/11—Making porous workpieces or articles
- B22F3/1103—Making porous workpieces or articles with particular physical characteristics
-
- 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
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
- B22F3/1125—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers involving a foaming process
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
-
- 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
- B22F3/11—Making porous workpieces or articles
- B22F3/1103—Making porous workpieces or articles with particular physical characteristics
- B22F2003/1106—Product comprising closed porosity
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
-
- 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
Abstract
The invention belongs to the technical field of additive manufacturing and forming, and particularly relates to closed-cell foam steel and a preparation method thereof. The preparation method comprises the following steps: mixing steel powder and magnesium powder or magnesium alloy powder to obtain mixed powder, wherein the mass percent of the magnesium powder or the magnesium alloy powder in the mixed powder is 2-7%; ball-milling the mixed powder to obtain a powder raw material; and performing additive manufacturing processing by using the powder raw material by adopting a selective laser melting technology or a direct laser deposition technology to obtain the closed-cell foam steel. The invention develops a novel laser preparation method of closed-cell foam steel, which realizes the preparation of closed-cell foam steel by using the program setting of a laser and the scanning of laser beams, and the aperture is generally within 120 mu m; the problem of harm of residues caused by conventional foam steel casting and sintering methods is solved; meanwhile, the design is more free, the environment is harmless, the limitation of a die is broken through, and the flexibility of manufacturing are greatly increased.
Description
Technical Field
The invention belongs to the field of additive manufacturing and forming, and particularly relates to closed-cell foam steel and a preparation method thereof.
Background
The closed-cell foam steel has unique application in the fields of heat insulation, energy absorption and the like, but the traditional preparation method has certain problems, such as the limitation of the size of a mould when the mould method is adopted for manufacturing; chemical residues exist when a powder metallurgy sintering method is adopted; when the laminating method is adopted, the method is only suitable for manufacturing simple shapes of the laminated board, and the shape is slightly complex, so that the preparation is difficult, and therefore people always find a suitable, convenient and quick preparation method.
In recent years, laser additive manufacturing techniques have been rapidly developed, which have unique advantages in the preparation of parts of complex shapes, composition gradient design and customization of organization and properties, thus becoming a new favorite in the manufacturing industry.
The prior preparation technology of the foam steel mostly adopts a die method, a laminating method, a sintering method and the like, and is rarely prepared by adopting a laser additive manufacturing technology. The possibility of using laser additive manufacturing techniques for the preparation of closed-cell foam steels would allow simpler and more free design and manufacture of closed-cell foam steels, which would allow further development of applications for functional foam steels.
Disclosure of Invention
The invention aims to provide the closed-cell foam steel and the preparation method thereof, which have no toxic and harmful substance residue, are not limited by a mould, do not need vacuum casting, can be applied to industries such as buildings, engineering and the like, and greatly prolong the service life of the product.
According to the technical scheme of the invention, the preparation method of the closed-cell foam steel comprises the following steps,
s1: mixing steel powder and magnesium powder or magnesium alloy powder to obtain mixed powder, wherein the mass percent of the magnesium powder or the magnesium alloy powder in the mixed powder is 2-7%;
s2: ball-milling the mixed powder to obtain a powder raw material;
s3: selecting laser processing parameters and scanning tracks according to the size requirement, and inputting the parameters and the scanning tracks into a corresponding laser processing operation system to obtain two-dimensional information; and performing additive manufacturing processing by using the powder raw material by adopting a selective laser melting technology or a direct laser deposition technology to obtain the closed-cell foam steel.
Further, in the step S2, the mixed powder is placed in a ball mill for ball milling for 1 to 3 hours to ensure sufficient and uniform mixing of the steel powder and the Mg powder or the magnesium alloy powder; the rotation speed of the ball mill is preferably selected so that the surface temperature of a ball milling tank of the ball mill does not exceed 60 ℃ in work; specifically, the ball milling speed is 50-100 r/min.
Further, argon or acetone is introduced in the ball milling process.
Further, in step S2, the specific operations of performing the additive manufacturing process by using the selective laser melting technology are: conveying part of the powder raw materials to a designated area by using a powder feeding mechanism, and compacting; meanwhile, under the protective atmosphere, scanning is carried out by using a laser according to the two-dimensional information, and the preset powder raw materials are melted; repeating the powder feeding, compacting and melting process until the closed cell foam steel is obtained.
Specifically, a YAG (yttrium aluminum garnet crystal) laser, a fiber laser, or a semiconductor laser is used, and the protective atmosphere may be argon gas.
Furthermore, the scanning speed is 40-200mm/min, and the laser power is 80-300W.
Further, after compacting, the thickness of each layer of the powder raw material is 0.2-0.5 mm.
Further, in step S2, the specific operations of performing the additive manufacturing process by using the laser direct deposition technique are: continuously conveying the powder raw material to a molten pool by using a powder feeding mechanism; and meanwhile, under a protective atmosphere (argon), scanning by using a laser according to the two-dimensional information, and melting and sintering until the closed-cell foam steel is obtained.
Furthermore, the powder feeding rate of the powder feeding mechanism is 3-51 g/min.
Furthermore, the scanning speed is 80-240mm/min, the lapping rate is 20-50%, and the laser power is 1000-2500W.
According to another aspect of the invention, the closed-cell foam steel prepared by the preparation method is provided.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the invention develops a novel laser preparation method of closed-cell foam steel, which obtains an entity of the closed-cell foam steel by optimizing process parameters, controlling power and scanning speed, wherein the preparation of the closed-cell foam steel is realized by utilizing the program setting of a laser and the scanning of laser beams, and the aperture is generally within 120 mu m;
2. the steel powder magnesium powder or magnesium alloy powder is premixed, the magnesium powder or magnesium alloy powder is used as a foaming agent, other components are not required to be added, residues do not have adverse effects on steel, and the problem of harm of the residues caused by conventional casting of foam steel and manufacturing of the foam steel by a sintering method is avoided; meanwhile, the flexibility problem of the laser additive manufacturing technology solves the problem that the laminating method is not easy to manufacture parts with complex shapes, so that the design is more free; meanwhile, the conventional casting method needs vacuum or auxiliary substances such as pore-forming agents and the like, so that the method is harmful to the environment; meanwhile, the laser is used under the protection of argon, vacuum is not needed, conventional software programming, program setting and laser beam scanning are selected for preparing the porous structure, the limitation of a die is broken through, and the flexibility of manufacturing are greatly increased.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
Example one
A laser preparation method of closed-cell foam steel selects commercial 316L stainless steel powder and Mg powder, wherein the purity of the Mg powder is more than 99.0 percent. The method comprises the following steps:
(a) mixing 316L stainless steel powder and Mg powder, wherein the Mg powder accounts for 2 percent of the total mass;
(b) and (3) placing the 316L stainless steel powder and the Mg powder which are mixed together in a ball mill, introducing argon gas for ball milling, and rotating the ball mill at the speed of 50 r/min. The ball milling time is 1h to ensure the sufficient/uniform mixing of the Mg powder and the stainless steel powder.
(c) According to the pore size of the closed-pore stainless steel required to be prepared, commercial software is selected for pore design and is input into a corresponding laser processing operation system, so that two-dimensional information of the closed-pore stainless steel is obtained and the rapid preparation is carried out; so-called rapid manufacturing, in particular: and conveying the mixed powder to a designated area by using a powder feeding mechanism, compacting, scanning under the control of a computer according to designed two-dimensional information by using a laser under the protection of argon gas, melting preset powder materials, feeding/compacting, melting and sintering, and repeating the process until a required sample piece is obtained. Performing linear irradiation, wherein the scanning speed of a laser beam is 42 mm/min; the compacted powder was 0.25mm thick per layer, the laser used was YAG, and the laser power was 105W. The prepared micropores are 10-17 μm.
Experimental tests show that the diameter of the micropores of the closed-cell stainless steel manufactured by the method is about 10-17 μm.
Example two
A laser preparation method of closed-cell foam steel, wherein 420 stainless steel is selected as steel powder, Mg-1Al magnesium alloy powder is selected as analytically pure magnesium alloy powder, and the Al content in the powder is 1 wt%, comprises the following steps:
(a) mixing commercial 420 stainless steel gold powder with Mg-1Al magnesium alloy powder, wherein the Mg powder accounts for 3.5 percent of the total mass;
(b) and (3) placing the mixed 420 stainless steel powder and Mg-1Al powder in a ball mill, and introducing argon for ball milling, wherein the rotating speed of the ball mill is 100 r/min. The ball milling time is 2 hours, so as to ensure the sufficient/uniform mixing of Mg-1Al powder and stainless steel 420 powder.
(c) According to the overall size requirement of the closed-cell foam steel required to be prepared, commercial software is selected for pore design and is input into a corresponding laser processing operation system, so that two-dimensional information of a closed-cell stainless steel 420 entity is obtained and rapid preparation is carried out; so-called rapid manufacturing, in particular: and conveying the mixed powder to a designated area by using a powder feeding mechanism, compacting, scanning under the control of a computer according to designed two-dimensional information by using a laser under the protection of argon gas, melting preset powder materials, feeding/compacting, melting and sintering, and repeating the process until a required sample piece is obtained. Performing linear irradiation, wherein the scanning speed of a laser beam is 160 mm/min; the thickness of each layer of the compacted powder was 0.35mm, the laser used was a fiber laser, and the laser power was 290W.
Experimental tests show that the pore diameter of the closed pores of the 420 stainless steel manufactured by the method of the embodiment is between 22 and 38 mu m.
EXAMPLE III
A laser preparation method of closed-cell foam steel, wherein 420 stainless steel is selected as steel powder, Mg-1Al magnesium alloy powder is selected as analytically pure magnesium alloy powder, and the Al content in the powder is 1 wt%, comprises the following steps:
(a) mixing commercial 420 stainless steel gold powder with Mg-1Al magnesium alloy powder, wherein the Mg powder accounts for 4.5 percent of the total mass;
(b) and (3) placing the mixed 420 stainless steel powder and Mg-1Al powder in a ball mill, and introducing acetone for ball milling, wherein the rotating speed of the ball mill is 100 r/min. The ball milling time is 2 hours, so as to ensure the sufficient/uniform mixing of Mg-1Al powder and stainless steel 420 powder.
(c) According to the overall size requirement of the closed-cell foam steel required to be prepared, commercial software is selected for pore design and is input into a corresponding laser processing operation system, so that two-dimensional information of a closed-cell stainless steel 420 entity is obtained and rapid preparation is carried out; so-called rapid manufacturing, in particular: and conveying the mixed powder to a designated area by using a powder feeding mechanism, compacting, scanning under the control of a computer according to designed two-dimensional information by using a laser under the protection of argon gas, melting preset powder materials, feeding/compacting, melting and sintering, and repeating the process until a required sample piece is obtained. Performing linear irradiation, wherein the scanning speed of a laser beam is 160 mm/min; the thickness of each layer of the compacted powder was 0.35mm, the laser used was a fiber laser, and the laser power was 290W.
Experimental tests show that the closed pores of the 420 stainless steel manufactured by the method of the embodiment have the diameter of 35-50 μm.
Example four
A laser preparation method of closed-cell foam steel adopts H13 die steel powder and Mg-Ca powder, wherein the mass ratio of Ca is 0.6%, and comprises the following steps:
(a) mixing H13 die steel powder with Mg-Ca powder, wherein the Mg powder accounts for 5.5 percent of the total mass;
(b) and (3) placing the H13 die steel powder and the Mg-Ca powder which are mixed together in a ball mill, introducing argon gas for ball milling, and rotating the ball mill at the speed of 80 r/min. The ball milling time was 3H to ensure sufficient/uniform mixing of the Mg-Ca powder with the H13 die steel powder.
(c) According to the size requirement of H13 die steel required to be prepared, commercial software is used for parameter selection, and the parameter selection is input into a corresponding laser processing operation system, so that two-dimensional information of closed-cell H13 die steel is obtained, and rapid preparation is carried out; so-called rapid manufacturing, in particular: and (3) conveying the mixed powder to a designated area by using a powder feeding mechanism, carrying out laser melting (in this case, laser direct deposition additive manufacturing technology) while conveying the powder, scanning under the protection of argon by using a laser under the control of a computer according to designed two-dimensional information, melting and sintering, and repeating the process until a required sample piece is obtained. The laser used is a semiconductor laser. The speed is 200mm/min, the powder feeding rate is 10g/min, the lapping rate is 25 percent, and the laser power is 1500W.
Experimental tests show that the closed-cell H13 die steel manufactured by the method of the embodiment has the cell diameter of 70-89 μm.
Example four
A laser preparation method of closed-cell foam steel adopts H13 die steel powder and Mg-Zr magnesium alloy powder, wherein the mass ratio of Zr is 1.5%, and comprises the following steps:
(a) mixing H13 die steel powder with Mg-Zr powder, wherein the Mg powder accounts for 6.5 percent of the total mass;
(b) and (3) placing the H13 die steel powder and the Mg-Zr powder which are mixed together in a ball mill, introducing argon gas for ball milling, and rotating the ball mill at the speed of 80 r/min. The ball milling time was 2.6H to ensure sufficient/uniform mixing of the Mg-Zr powder with the H13 die steel powder.
(c) According to the size requirement of H13 die steel required to be prepared, commercial software is used for parameter selection, and the parameter selection is input into a corresponding laser processing operation system, so that two-dimensional information of closed-cell H13 die steel is obtained, and rapid preparation is carried out; so-called rapid manufacturing, in particular: and (3) conveying the mixed powder to a designated area by using a powder feeding mechanism, carrying out laser melting (in this case, laser energy direct deposition additive manufacturing technology) while conveying the powder, scanning under the protection of argon by using a laser under the control of a computer according to designed two-dimensional information, melting and sintering, and repeating the process until a required sample piece is obtained. The line irradiation is performed using a semiconductor laser as the laser. The speed is 80mm/min, the powder feeding rate is 40g/min, the lap joint rate is 40%, and the laser power is 2300W.
Experimental tests show that the porous magnesium alloy manufactured by the method of the embodiment has the pore diameter of 90-105 μm.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A method for producing closed-cell foam steel, characterized in that it comprises the following steps,
s1: mixing steel powder and magnesium powder or magnesium alloy powder to obtain mixed powder, wherein the mass percent of the magnesium powder or the magnesium alloy powder in the mixed powder is 2-7%;
s2: ball-milling the mixed powder to obtain a powder raw material;
s3: selecting laser processing parameters and scanning tracks according to the size requirement, and inputting the parameters and the scanning tracks into a corresponding laser processing operation system to obtain two-dimensional information; and performing additive manufacturing processing by using the powder raw material by adopting a selective laser melting technology or a direct laser deposition technology to obtain the closed-cell foam steel.
2. The method for preparing the closed-cell foam steel according to claim 1, wherein in the step S2, the mixed powder is placed in a ball mill for ball milling for 1-3 h; in the ball milling process, the surface temperature of a ball milling tank of the ball mill is not more than 60 ℃.
3. A method of producing a closed cell foam steel according to claim 2 wherein argon or acetone is introduced during the ball milling process.
4. The method for preparing the closed-cell foam steel according to claim 1, wherein the step S2, the additive manufacturing process using the selective laser melting technique comprises the following specific operations: conveying part of the powder raw materials to a designated area by using a powder feeding mechanism, and compacting; meanwhile, under the protective atmosphere, scanning is carried out by using a laser according to the two-dimensional information, and the preset powder raw materials are melted; repeating the powder feeding, compacting and melting process until the closed cell foam steel is obtained.
5. The method of preparing a closed cell foam steel according to claim 4 wherein the scanning rate is 40-200mm/min and the laser power is 80-300W.
6. A method of producing a closed cell foam steel according to claim 4 wherein the thickness of each layer of powdered raw material after compaction is 0.2 to 0.5 mm.
7. The method for preparing the closed-cell foam steel according to claim 1, wherein the step S2, the additive manufacturing process using the laser direct deposition technique comprises the following specific operations: continuously conveying the powder raw material to a molten pool by using a powder feeding mechanism; and meanwhile, under a protective atmosphere, scanning by using a laser according to the two-dimensional information, and melting and sintering until the closed-cell foam steel is obtained.
8. The method of claim 7, wherein the powder feed rate of the powder feed mechanism is 3 to 51 g/min.
9. The method for preparing the closed-cell foam steel as claimed in claim 7, wherein the scanning speed is 80-240mm/min, the lap joint rate is 20-50%, and the laser power is 1000-.
10. A closed cell foam steel produced by the method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670074.2A CN114535599A (en) | 2021-12-30 | 2021-12-30 | Closed-cell foam steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670074.2A CN114535599A (en) | 2021-12-30 | 2021-12-30 | Closed-cell foam steel and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114535599A true CN114535599A (en) | 2022-05-27 |
Family
ID=81669901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111670074.2A Pending CN114535599A (en) | 2021-12-30 | 2021-12-30 | Closed-cell foam steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114535599A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115156553A (en) * | 2022-08-05 | 2022-10-11 | 江苏亚威创科源激光装备有限公司 | Closed-cell foam steel and laser additive manufacturing technology preparation method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006124755A (en) * | 2004-10-27 | 2006-05-18 | Japan Aerospace Exploration Agency | Hollow metal sphere made from magnesium alloy |
| CN102166651A (en) * | 2011-03-29 | 2011-08-31 | 黑龙江科技学院 | Method for manufacturing porous metal parts by laser scanning |
| CN105642898A (en) * | 2016-01-14 | 2016-06-08 | 哈尔滨工程大学 | Method for manufacturing sealed-hole-structure metal-based material through 3D laser printing technology |
| CN106222521A (en) * | 2016-07-27 | 2016-12-14 | 黄宇 | A kind of porous metal composite material |
| CN107159892A (en) * | 2017-04-21 | 2017-09-15 | 董晓 | A kind of preparation method of even porous structure blister steel |
| CN107326208A (en) * | 2017-06-20 | 2017-11-07 | 西安理工大学 | A kind of foam magnesium or foam aluminum alloy and preparation method thereof |
| CN107675015A (en) * | 2017-10-11 | 2018-02-09 | 中国民航大学 | A kind of closed pore CNTs/Al Si composite foam materials and preparation method thereof |
| CN109022881A (en) * | 2018-10-12 | 2018-12-18 | 成都先进金属材料产业技术研究院有限公司 | Sago is as the purposes of pore creating material, pore creating material and its method for preparing foam metal |
| CN109513940A (en) * | 2019-01-21 | 2019-03-26 | 苏州大学 | A kind of laser preparation method of organism porous magnesium alloy |
| CN111250707A (en) * | 2020-03-14 | 2020-06-09 | 中北大学 | Composite metal foaming powder material based on selective laser melting forming technology and preparation thereof |
| CN112195382A (en) * | 2020-11-05 | 2021-01-08 | 中国科学院长春应用化学研究所 | Self-foaming porous magnesium alloy and preparation method thereof |
| CN113226622A (en) * | 2018-12-19 | 2021-08-06 | 速尔特技术有限公司 | Additive manufacturing system for two-dimensional printing using pulsed laser |
-
2021
- 2021-12-30 CN CN202111670074.2A patent/CN114535599A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006124755A (en) * | 2004-10-27 | 2006-05-18 | Japan Aerospace Exploration Agency | Hollow metal sphere made from magnesium alloy |
| CN102166651A (en) * | 2011-03-29 | 2011-08-31 | 黑龙江科技学院 | Method for manufacturing porous metal parts by laser scanning |
| CN105642898A (en) * | 2016-01-14 | 2016-06-08 | 哈尔滨工程大学 | Method for manufacturing sealed-hole-structure metal-based material through 3D laser printing technology |
| CN106222521A (en) * | 2016-07-27 | 2016-12-14 | 黄宇 | A kind of porous metal composite material |
| CN107159892A (en) * | 2017-04-21 | 2017-09-15 | 董晓 | A kind of preparation method of even porous structure blister steel |
| CN107326208A (en) * | 2017-06-20 | 2017-11-07 | 西安理工大学 | A kind of foam magnesium or foam aluminum alloy and preparation method thereof |
| CN107675015A (en) * | 2017-10-11 | 2018-02-09 | 中国民航大学 | A kind of closed pore CNTs/Al Si composite foam materials and preparation method thereof |
| CN109022881A (en) * | 2018-10-12 | 2018-12-18 | 成都先进金属材料产业技术研究院有限公司 | Sago is as the purposes of pore creating material, pore creating material and its method for preparing foam metal |
| CN113226622A (en) * | 2018-12-19 | 2021-08-06 | 速尔特技术有限公司 | Additive manufacturing system for two-dimensional printing using pulsed laser |
| CN109513940A (en) * | 2019-01-21 | 2019-03-26 | 苏州大学 | A kind of laser preparation method of organism porous magnesium alloy |
| CN111250707A (en) * | 2020-03-14 | 2020-06-09 | 中北大学 | Composite metal foaming powder material based on selective laser melting forming technology and preparation thereof |
| CN112195382A (en) * | 2020-11-05 | 2021-01-08 | 中国科学院长春应用化学研究所 | Self-foaming porous magnesium alloy and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴鹏: "《激光烧结成形多孔不锈钢的组织特征及压缩性能研究》", 15 June 2007 (2007-06-15), pages 16 - 17 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115156553A (en) * | 2022-08-05 | 2022-10-11 | 江苏亚威创科源激光装备有限公司 | Closed-cell foam steel and laser additive manufacturing technology preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Guo et al. | Selective laser melting additive manufacturing of pure tungsten: Role of volumetric energy density on densification, microstructure and mechanical properties | |
| CN108213408B (en) | Method for preparing porous metal part with complex structure by using 3D printing technology | |
| EP1755809B1 (en) | Method of production of porous metallic materials | |
| CN110449581B (en) | TiAl + Ti2Method for preparing AlNb composite material by laser melting deposition | |
| Zhang et al. | The study of the laser parameters and environment variables effect on mechanical properties of high compact parts elaborated by selective laser melting 316L powder | |
| Simchi et al. | Densification and microstructural evaluation during laser sintering of M2 high speed steel powder | |
| US3235346A (en) | Composite bodies comprising a continuous framework and an impregnated metallic material and methods of their production | |
| USRE47748E1 (en) | Production of amorphous metallic foam by powder consolidation | |
| CN101560624B (en) | Method for preparing polycrystalline cubic boron nitride | |
| CN100465309C (en) | Method for preparing alloy material of high niobium-titanium-aluminum by discharging plasma agglomeration | |
| US6143371A (en) | Process for producing an MG-based composite material or an MG alloy-based composite material | |
| CN114535599A (en) | Closed-cell foam steel and preparation method thereof | |
| CN109365810B (en) | Method for preparing copper-based shape memory alloy in any shape in situ by laser and product | |
| CN112191854A (en) | Hard alloy powder for 3D printing and application thereof | |
| CN109332717B (en) | Preparation method of spherical molybdenum titanium zirconium alloy powder | |
| CN114406285B (en) | Method for preparing closed-cell foam steel by laser additive manufacturing technology | |
| CN113881873B (en) | High-density trans-scale solid solution ceramic reinforced aluminum matrix composite and preparation method thereof | |
| Zhou et al. | Microstructure and mechanical behavior of porous tungsten skeletons synthesized by selected laser melting | |
| CN106946567B (en) | A kind of intermetallic Fe-Al compound and ZrO2The preparation method of composite diphase material mobile phone pottery backboard | |
| CN108044122B (en) | Preparation method of Nb-Si-based alloy hollow turbine blade | |
| CN117324620A (en) | Method for preparing closed-cell foam steel by laser additive manufacturing technology | |
| CN113909480B (en) | Preparation method of in-situ nano zirconium oxide particle dispersion reinforced tungsten alloy | |
| CN113652586A (en) | Special nano modified tungsten alloy for selective laser melting and preparation method thereof | |
| CN110842199A (en) | Method for preparing pure tungsten component with complex structure by selective laser melting | |
| CN116426784B (en) | Method for preparing particle reinforced eutectic high-entropy alloy based on laser powder bed melting technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |