CN116475424A - Preparation method of rotary disk for atomizing titanium and titanium alloy powder by centrifugal disk - Google Patents
Preparation method of rotary disk for atomizing titanium and titanium alloy powder by centrifugal disk Download PDFInfo
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- CN116475424A CN116475424A CN202310255663.7A CN202310255663A CN116475424A CN 116475424 A CN116475424 A CN 116475424A CN 202310255663 A CN202310255663 A CN 202310255663A CN 116475424 A CN116475424 A CN 116475424A
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- 239000000843 powder Substances 0.000 title claims abstract description 34
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 33
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000010936 titanium Substances 0.000 title claims abstract description 23
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 238000007639 printing Methods 0.000 claims abstract description 51
- 238000010894 electron beam technology Methods 0.000 claims abstract description 38
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 38
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000002844 melting Methods 0.000 claims abstract description 21
- 230000008018 melting Effects 0.000 claims abstract description 21
- 239000001307 helium Substances 0.000 claims abstract description 10
- 229910052734 helium Inorganic materials 0.000 claims abstract description 10
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 125000000174 L-prolyl group Chemical group [H]N1C([H])([H])C([H])([H])C([H])([H])[C@@]1([H])C(*)=O 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 10
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 238000009690 centrifugal atomisation Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract description 2
- 238000010146 3D printing Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 229910052727 yttrium Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- XHFLMVUWWQVXGR-UHFFFAOYSA-N tungsten yttrium Chemical compound [Y]=[W] XHFLMVUWWQVXGR-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
-
- 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
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
-
- 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
-
- 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 discloses a preparation method of a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk, which comprises the following steps: s1, drawing a three-dimensional drawing of a rotating disc through software, converting the drawing into an STL file format, cutting the file into a series of ordered slice layers with a certain thickness by using slicing software, and transmitting two groups of slice data into an electron beam selective melting forming equipment system; s2, respectively placing tungsten powder and yttrium powder into a No. 1 feeding bin and a No. 2 feeding bin of electron beam selective melting forming equipment; s3, preheating the substrate, printing a bottom support rod and the lower layer of the rotary disk by using tungsten powder, printing to a preset layer height, continuously printing the upper layer of the rotary disk by using yttrium powder, and printing to the preset layer height; s4, cooling the rotating disk subjected to electron beam selective melting forming to below 60 ℃ under the protection of helium, and then taking out. The method solves the problem that the combination of two metal interfaces is poor in the spraying process, realizes the metallurgical combination between metals, and solves the problem that the rotary disk centrifugal atomization method cannot prepare-53 mu m titanium alloy powder in batches.
Description
Technical Field
The invention relates to the technical field of metal powder material preparation, in particular to a preparation method of a rotating disc for atomizing titanium and titanium alloy powder by a centrifugal disc.
Background
Along with the change of the processing mode, a 3D printing rapid prototyping technology is generated and rapidly developed, and the 3D printing is used for manufacturing solid parts in a layer-by-layer printing mode. The titanium alloy has the characteristics of high strength, low density, excellent corrosion resistance and the like, and is widely applied to the fields of aerospace, biomedical treatment and the like. Along with the wide application of titanium alloy 3D printing parts, the demand for spherical 3D printing titanium alloy powder is rapidly increased, and the problems of high hollow rate, poor sphericity, high cost and the like of the titanium powder prepared by adopting a gas atomization method in the current industrial production are solved, so that the novel method for preparing the titanium alloy powder is urgently needed.
The centrifugal atomizing method of the rotating disk is generally used for preparing metal powder with lower melting point, such as aluminum powder, copper powder, tin powder and the like, and the preparation of-53 mu m titanium alloy powder by the centrifugal atomizing method is not realized in the world. Because the working environment of the centrifugal atomizing disk is high-speed and high-temperature. The material of the general rotating disk is mainly iron-based surface sprayed with high temperature resistant ceramic material or ceramic material, and the melting point of titanium is about 1668 ℃; the common rotating disk material cannot resist heat shock and high-temperature strength, and is operated at high temperature and ultrahigh rotating speed for a long time, so that the centrifugal atomizing disk is easy to crack and break, and a special atomizing disk is lacked to realize the preparation of titanium alloy powder by adopting a centrifugal atomizing method. The electron beam 3D printing technology adopts high-energy electron beams to rapidly melt high-melting-point metal powder at one time, directly obtains parts with arbitrary shapes and complete metallurgical bonding, and becomes the first choice process for preparing the high-melting-point rotating disc.
Disclosure of Invention
The invention aims to provide a preparation method of a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk, which can effectively overcome the defect that the rotating disk cannot resist heat shock and has high-temperature strength, and can be used for preparing spherical 3D printing titanium alloy powder. In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a preparation method of a rotary disk for atomizing titanium and titanium alloy powder by a centrifugal disk, which comprises the following steps:
step S1, drawing a three-dimensional drawing of a rotating disc through software, converting the drawing into an STL file format, cutting the file into a series of ordered slice layers with a certain thickness by using slicing software, and transmitting two groups of slice data into an electron beam selective melting forming equipment system;
s2, respectively placing tungsten powder and yttrium powder into a No. 1 feeding bin and a No. 2 feeding bin of electron beam selective melting forming equipment;
step S3, preheating the substrate, printing a bottom supporting rod and the lower layer of the rotary disk by using tungsten powder, printing to a preset layer height, continuously printing the upper layer of the rotary disk by using yttrium powder, and printing to the preset layer height;
and S4, cooling the rotating disk subjected to electron beam selective melting forming to below 60 ℃ under the protection of helium, and then taking out.
In one possible embodiment, the software in step S1 is one of CAD, pro/E, solidworks, UG, or 3 Dmax.
In one possible embodiment, the shape of the rotating disc is a plate, bowl or cup;
the length of the bottom support rod of the rotary disc is 10-30 mm, and the diameter is 3-15 mm;
the total height of the lower layer and the upper layer of the rotating disc is 4-15 mm, and the diameter is 10-80 mm.
In one possible implementation, the thickness of each tungsten powder printing layer in the middle of the first set of slice data in the step S1 is 0.05-0.06 mm, and the total height of tungsten powder printing is 3-10 mm.
In one possible embodiment, the thickness of each layer of yttrium powder printed in the middle of the second set of slice data in step S1 is 0.04-0.05 mm, and the total height of yttrium powder printed is 1-5 mm.
In one possible embodiment, the particle size of the tungsten powder in the step S2 is 53-105 μm, and the sphericity is not less than 0.8; the granularity of the yttrium powder is 45-105 mu m, and the sphericity is not less than 0.8.
In one possible embodiment, the substrate preheating temperature in step S3 is 900 to 1000 ℃; the printing vacuum degree is not more than 2×10 -2 pa。
In one possible embodiment, the printing conditions of the tungsten powder in step S3 include:
the scanning current of the electron beam is 8-11 mA, the scanning speed is 110-150 mm/s, the scanning line spacing is 0.05-0.1 mm, and the scanning path is in a chessboard type.
In one possible embodiment, the printing conditions of the yttrium powder in step S3 include:
the scanning current of the electron beam is 4-6 mA, the scanning speed is 200-300 mm/s, the scanning line spacing is 0.1-0.3 mm, and the scanning path is checkerboard.
In one possible embodiment, the helium purity in step S3 is not less than 99.99%.
The invention has the technical effects and advantages that:
according to the invention, tungsten powder and pure yttrium powder are used as raw materials, and the tungsten-yttrium rotating disk is prepared by an electron beam 3D printing integrated molding method, so that the problem of poor bonding of two metal interfaces in the spraying process is solved, the metallurgical bonding between metals is realized, and the problem that the rotating disk centrifugal atomization method cannot prepare-53 mu m titanium alloy powder in batches is solved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
Fig. 1 is a drawing showing a rotating disc in the shape of a flat plate prepared in exemplary embodiment 2 of the present invention;
FIG. 2 is a diagram of a rotating disk in the shape of a bowl made in accordance with the present invention;
fig. 3 shows a rotary disk in the shape of a cup made in accordance with the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The core design concept of the invention comprises: considering that the material, shape and size of the rotating disc and factors such as wettability, thermal strength, scouring loss and the like of titanium and titanium alloy melt have important influence on the particle size distribution, sphericity and stability of the powder of titanium and titanium alloy in the whole centrifugal atomization process; according to the invention, high-melting-point tungsten is selected as a matrix, and yttrium is selected as a centrifugal atomizing disk surface material in consideration of good wettability of yttrium, titanium and titanium alloy melt, and a small amount of yttrium element can refine titanium alloy grains, so that the strength is improved, and the toughness is improved; at present, a titanium alloy melting experiment shows that an atomization disc taking yttrium oxide as a spray coating is easy to crack and break at high temperature due to different thermal expansion coefficients with a matrix tungsten metal by using a tungsten-based yttrium oxide coating disc, so that the invention takes tungsten powder and pure yttrium powder as raw materials, and prepares a tungsten-yttrium rotating disc by an electron beam 3D printing integrated forming method, thereby realizing intermetallic metallurgical bonding and solving the cracking problem.
For this purpose, the invention provides a method for preparing a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk, which comprises the following steps:
step S1, drawing a three-dimensional drawing of a rotating disk on a computer through software, converting the drawing into an STL file format, cutting the file into a series of ordered slice layers with a certain thickness by using slicing software, and transmitting two groups of slice data into an EBM (electron beam selective melting forming) equipment system;
s2, respectively placing tungsten powder and yttrium powder into a No. 1 feeding bin and a No. 2 feeding bin of electron beam selective melting forming equipment;
step S3, preheating the substrate, printing a bottom supporting rod and the lower layer of the rotary disk by using tungsten powder, printing to a preset layer height, continuously printing the upper layer of the rotary disk by using yttrium powder, and printing to the preset layer height;
and S4, cooling the rotating disk subjected to electron beam selective melting forming to below 60 ℃ under the protection of helium, and then taking out.
In step S1 of the invention, the software is one of CAD, pro/E, solidworks, UG or 3 Dmax; the shape of the rotating disc is a flat plate type, a bowl type or a cup type; the length of the bottom supporting rod is 10-30 mm, and the diameter is 3-15 mm; the total height of the lower layer and the upper layer is 4-15 mm, and the diameter is 10-80 mm.
Specifically, the printing thickness of each tungsten powder layer in the middle of the first group of slice data is 0.05-0.06 mm, and the total height of tungsten powder printing is 3-10 mm; the printing thickness of each layer of yttrium powder in the middle of the second group of slice data is 0.04-0.05 mm, and the total printing height of yttrium powder is 1-5 mm.
In the step S2 of the invention, the particle size of the tungsten powder is 53-105 mu m, the sphericity is not less than 0.8, the particle size of the yttrium powder is 45-105 mu m, the sphericity is not less than 0.8, and the type of the fed powder is automatically switched according to the system setting printing layer thickness.
In step S3 of the present invention, the pair of electron beam printing is performed with a device vacuum degree of not more than 2×10 -2 pa, wherein the preheating temperature of the substrate is 900-1000 ℃; the scanning current of the electron beam in the tungsten powder printing process is 8-11 mA, the scanning speed is 110-150 mm/s, the scanning line spacing is 0.05-0.1 mm, and the scanning path is checkerboard; the scanning current of the yttrium powder electron beam is 4-6 mA, the scanning speed is 200-300 mm/s, the scanning line spacing is 0.1-0.3 mm, and the scanning path is checkerboard.
In step S4 of the present invention, the helium purity is not less than 99.99%.
Example 1:
the invention provides a preparation method of a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk, which comprises the following steps:
s1, converting a three-dimensional model of a rotary disk into an STL file format through CAD three-dimensional design, wherein the diameter of a bottom supporting rod is 3mm, and the length of the bottom supporting rod is 10mm; the diameter of the rotating disc is 10mm, and the height is 4mm; the thickness of tungsten powder printed in the middle of each layer of slice data in the first group is 0.05mm, and the total height of tungsten powder printed is 3mm; the thickness of yttrium powder printing of each layer in the middle of the second group of slicing data is 0.04mm, the total height of yttrium powder printing is 1mm, and the data is transmitted to an electron beam selective melting forming system.
And S2, respectively adding the tungsten powder with the granularity of 53-105 mu m and the yttrium powder with the granularity of 45-105 mu m into a 1# feeding bin and a 2# feeding bin, and automatically switching the types of the fed powder according to the set printing time by the system.
Step S3, setting process parameters of electron beam printing: the preheating temperature of the substrate is 950 ℃; the scanning current of the electron beam in the tungsten powder printing process is 8mA, the scanning speed is 110mm/s, and the scanning line spacing is 0.05mm; the scanning current of the yttrium powder electron beam is 4mA, the scanning speed is 200mm/s, and the scanning line spacing is 0.1mm.
And S4, cooling the rotating disk formed by electron beam selective melting to below 60 ℃ under the protection of 99.99% helium, and then taking out the flat rotating disk.
Example 2:
the invention provides a preparation method of a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk, which comprises the following steps:
s1, converting a three-dimensional model of a rotary disk into an STL file format through CAD three-dimensional design, wherein the diameter of a bottom supporting rod is 5mm, and the length of the bottom supporting rod is 20mm; the diameter of the rotating disc is 50mm, and the height is 7mm; the thickness of tungsten powder printing in the middle of each layer of slice data in the first group is 0.055mm, and the total height of tungsten powder printing is 5mm; the thickness of yttrium powder printing of each layer in the middle of the second group of slicing data is 0.045mm, the total height of yttrium powder printing is 2mm, and the data is transmitted to an electron beam selective melting forming system.
And S2, respectively adding the tungsten powder with the granularity of 53-105 mu m and the yttrium powder with the granularity of 45-105 mu m into a 1# feeding bin and a 2# feeding bin, and automatically switching the types of the fed powder according to the set printing time by the system.
Step S3, setting process parameters of electron beam printing: the preheating temperature of the substrate is 900 ℃; the scanning current of the electron beam in the tungsten powder printing process is 10mA, the scanning speed is 120mm/s, and the scanning line spacing is 0.08mm; the scanning current of the yttrium powder electron beam is 5mA, the scanning speed is 250mm/s, and the scanning line spacing is 0.2mm.
And S4, cooling the rotating disk formed by electron beam selective melting to below 60 ℃ under the protection of 99.99% helium, and then taking out the flat rotating disk.
Fig. 1 is a view showing a flat-type rotary disk in the shape of example 2 according to the present invention, wherein the support rods and the lower layer of the flat-type rotary disk are tungsten and the upper layer is yttrium as shown in fig. 1.
Example 3:
the invention provides a preparation method of a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk, which comprises the following steps:
s1, converting a three-dimensional model of a rotary disk into an STL file format through CAD three-dimensional design, wherein the diameter of a bottom supporting rod is 15mm, and the length of the bottom supporting rod is 30mm; the diameter of the rotating disc is 80mm, and the height is 15mm; the thickness of tungsten powder printed in the middle of each layer of slice data in the first group is 0.06mm, and the total height of tungsten powder printed is 10mm; the thickness of yttrium powder printing of each layer in the middle of the second group of slicing data is 0.05mm, the total height of yttrium powder printing is 5mm, and the data is transmitted to an electron beam selective melting forming system.
And S2, respectively adding the tungsten powder with the granularity of 53-105 mu m and the yttrium powder with the granularity of 45-105 mu m into a 1# feeding bin and a 2# feeding bin, and automatically switching the types of the fed powder according to the set printing time by the system.
Step S3, setting process parameters of electron beam printing: the preheating temperature of the substrate is 1000 ℃; the scanning current of the electron beam in the tungsten powder printing process is 11mA, the scanning speed is 150mm/s, and the scanning line spacing is 0.05mm; the scanning current of the yttrium powder electron beam is 6mA, the scanning speed is 300mm/s, and the scanning line spacing is 0.3mm.
And S4, cooling the rotating disk formed by electron beam selective melting to below 60 ℃ under the protection of 99.99% helium, and then taking out the flat rotating disk.
It should be noted that, three-dimensional drawings of rotating discs with different shapes are drawn on a computer through software, and then converted into STL file formats, in addition, corresponding specific parameters are changed, and according to the same operation steps as in the embodiment 1, the rotating discs with different shapes can be obtained, and as shown in fig. 2, the rotating disc with the shape of bowl is prepared by the invention; figure 3 shows a rotary disk in the shape of a cup made in accordance with the present invention.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (10)
1. A method for preparing a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk, which is characterized by comprising the following steps:
step S1, drawing a three-dimensional drawing of a rotating disc through software, converting the drawing into an STL file format, cutting the file into a series of ordered slice layers with a certain thickness by using slicing software, and transmitting two groups of slice data into an electron beam selective melting forming equipment system;
s2, respectively placing tungsten powder and yttrium powder into a No. 1 feeding bin and a No. 2 feeding bin of electron beam selective melting forming equipment;
step S3, preheating the substrate, printing a bottom supporting rod and the lower layer of the rotary disk by using tungsten powder, printing to a preset layer height, continuously printing the upper layer of the rotary disk by using yttrium powder, and printing to the preset layer height;
and S4, cooling the rotating disk subjected to electron beam selective melting forming to below 60 ℃ under the protection of helium, and then taking out.
2. The method of claim 1, wherein the software in step S1 is one of CAD, pro/E, solidworks, UG or 3 Dmax.
3. The method for preparing a rotating disk material of centrifugal disk atomized titanium and titanium alloy powder according to claim 1, wherein the shape of the rotating disk is a flat plate, a bowl or a cup;
the length of the bottom support rod of the rotary disc is 10-30 mm, and the diameter is 3-15 mm;
the total height of the lower layer and the upper layer of the rotating disc is 4-15 mm, and the diameter is 10-80 mm.
4. The method for preparing a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk according to claim 3, wherein the thickness of each tungsten powder layer printed in the middle of the first set of slice data in the step S1 is 0.05-0.06 mm, and the total height of tungsten powder printed is 3-10 mm.
5. The method for preparing a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk according to claim 3, wherein the thickness of yttrium powder printing of each layer in the middle of the second set of slice data in the step S1 is 0.04-0.05 mm, and the total height of yttrium powder printing is 1-5 mm.
6. The method for preparing a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk according to claim 1, wherein the particle size of the tungsten powder in step S2 is 53 to 105 μm, and the sphericity is not less than 0.8; the granularity of the yttrium powder is 45-105 mu m, and the sphericity is not less than 0.8.
7. The method for preparing a rotating disk for atomizing titanium and titanium alloy powder by a centrifugal disk according to claim 1, wherein the substrate preheating temperature in step S3 is 900 to 1000 ℃; the printing vacuum degree is not more than 2×10 -2 pa。
8. The method for preparing a rotating disk for atomizing titanium and titanium alloy powder by centrifugal disk according to claim 1, wherein the printing conditions of the tungsten powder in step S3 include:
the scanning current of the electron beam is 8-11 mA, the scanning speed is 110-150 mm/s, the scanning line spacing is 0.05-0.1 mm, and the scanning path is in a chessboard type.
9. The method for preparing a rotating disk for atomizing titanium and titanium alloy powder by centrifugal disk according to claim 1, wherein the printing conditions of yttrium powder in step S3 include:
the scanning current of the electron beam is 4-6 mA, the scanning speed is 200-300 mm/s, the scanning line spacing is 0.1-0.3 mm, and the scanning path is checkerboard.
10. The method for preparing a rotating disk for atomizing titanium and titanium alloy powder by centrifugal disk according to claim 1, wherein the helium gas purity in step S3 is not less than 99.99%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310255663.7A CN116475424A (en) | 2023-03-16 | 2023-03-16 | Preparation method of rotary disk for atomizing titanium and titanium alloy powder by centrifugal disk |
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