CN112548118A - Method for rapidly forming metallurgical auxiliary prefabricated part by adopting 3D printing mode - Google Patents
Method for rapidly forming metallurgical auxiliary prefabricated part by adopting 3D printing mode Download PDFInfo
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- CN112548118A CN112548118A CN202011281116.9A CN202011281116A CN112548118A CN 112548118 A CN112548118 A CN 112548118A CN 202011281116 A CN202011281116 A CN 202011281116A CN 112548118 A CN112548118 A CN 112548118A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
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- 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
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- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- 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
- B33Y80/00—Products made by additive manufacturing
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- 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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Abstract
A method for rapidly forming a metallurgical auxiliary prefabricated part in a 3D printing mode comprises the steps of material preparation, model data processing, lamination manufacturing, manufacturing completion and optional material packaging, wherein a computer controls 3D printing equipment to firstly lay a layer of first metallurgical auxiliary material particles on a processing platform in the lamination manufacturing process, an energy beam is controlled to scan the first metallurgical auxiliary material particles to form a first metallurgical auxiliary material layer, the first metallurgical auxiliary material layer at least has a completely molten layer, when the second metallurgical auxiliary material particles are laid to form a second metallurgical auxiliary material layer, the second metallurgical auxiliary material particles are not molten, and the lamination manufacturing process is repeated until manufacturing of all slicing layers is completed. The method fully utilizes the advantages of 3D printing and rapid forming and planning of materials of all layers, realizes rapid forming of spheroidizing/inoculating metallurgy auxiliary prefabricated parts, and simultaneously realizes regulation and control of the melting and releasing process of the prefabricated parts in molten iron through planning of interlayer composition.
Description
Technical Field
The invention relates to the technical field of 3D printing of metal materials, in particular to a method for quickly forming a metallurgical auxiliary prefabricated member by adopting a 3D printing mode.
Background
In the process of smelting nodular cast iron, molten iron needs to be spheroidized and inoculated, a nodulizer material or an inoculant material is usually arranged at the bottom of a ladle in advance, the nodulizer material or the inoculant material is covered by slag agents or is matched with a cover plate which is the same as the molten iron in material to be limited at the bottom of the ladle, the operation of covering by the slag agents is simple but is easily scoured and floated by the molten iron, so that the consumption of the molten iron boiling, spheroidizing and inoculating materials is increased, the effect of limiting at the bottom of the ladle by matching the dam or the pit of the bottom of the ladle with the cover plate which is the same as the molten iron in material to be better than that of directly covering by the slag agents, but the nodulizing and inoculating ladle has requirements on the bottom structure of.
Metal 3D printing, also known in the industry as metal additive manufacturing, is a manufacturing method by material accumulation from bottom to top, which is a method based on digital model files, and builds up layer by layer a special metal material through software and a numerical control system in ways of extrusion, sintering, melting, photocuring, spraying, etc. to manufacture a solid object. At present, the metal 3D printing technology is mainly used for solving the manufacturing problem of complex structural parts and is not widely applied in industrial production because the manufacturing mode has small production batch and more complex process control and product post-treatment, and particularly, the metal 3D printing technology is not applied in the manufacturing field of spheroidizing/inoculating metallurgical auxiliary prefabricated parts.
Disclosure of Invention
The invention provides a method for rapidly forming a metallurgical auxiliary prefabricated part by adopting a 3D printing mode, which utilizes the rapid forming advantage of 3D printing and the advantage of planning materials of all layers, realizes rapid forming of spheroidizing/inoculating metallurgical auxiliary prefabricated part, and simultaneously realizes regulation and control of the melting and releasing process of the prefabricated part in molten iron through planning interlayer composition.
The purpose of the invention is realized by the following technical scheme.
A method for rapidly forming a metallurgical auxiliary prefabricated part by adopting a 3D printing mode comprises the following steps:
material preparation
Preparing at least two different metallurgical auxiliary material particles, namely a first metallurgical auxiliary material particle and a second metallurgical auxiliary material particle, wherein the first metallurgical auxiliary material particle and the second metallurgical auxiliary material particle are selected from a melting buffer material, a spheroidizing material, an inoculation material or a refining material in metallurgy, the first metallurgical auxiliary material particle is a high-melting point material, the second metallurgical auxiliary material particle is a low-melting point material, and the first metallurgical auxiliary material particle and the second metallurgical auxiliary material particle are respectively loaded into two different blanking hoppers, namely a first blanking hopper and a second blanking hopper, of a 3D printing device;
model data processing
Importing a three-dimensional model of a metallurgical auxiliary prefabricated part to be manufactured into a 3D printing equipment computer, slicing the three-dimensional model by layers by adopting slicing software according to the thickness requirement of each layer, and setting the material type of each layer;
laminate manufacturing
The method comprises the steps that a first blanking hopper of a 3D printing device is controlled by a computer to lay a layer of first metallurgical auxiliary material particles on a processing platform, an energy beam is controlled to scan the first metallurgical auxiliary material particles to form a first metallurgical auxiliary material layer, the first metallurgical auxiliary material layer at least has a completely melted layer by controlling energy beam processing parameters, then a second blanking hopper of the 3D printing device is controlled by the computer to lay a layer of second metallurgical auxiliary material particles on the formed first metallurgical auxiliary material layer to form a second metallurgical auxiliary material layer, wherein when the second metallurgical auxiliary material layer is formed, the second metallurgical auxiliary material particles are not melted and are kept in a natural accumulation state, or are bonded only by using the waste heat of the formed first metallurgical auxiliary material layer, or are scanned and heated only;
complete the manufacture
And repeating the manufacturing of the first metallurgical auxiliary material layer and the second metallurgical auxiliary material layer until the manufacturing of all sliced layers is completed, and forming a metallurgical auxiliary prefabricated member containing the first metallurgical auxiliary material layer and the second metallurgical auxiliary material layer which are alternately distributed.
The method for rapidly forming the metallurgical auxiliary prefabricated member by adopting the 3D printing mode further comprises material packaging, wherein the material packaging is formed by completely melting the metallurgical auxiliary material particles on the current layer at the contour position of the current layer in the process of alternately forming the first metallurgical auxiliary material layer and the second metallurgical auxiliary material layer, or is formed by paving the metallurgical auxiliary material particles layer by layer and scanning and melting the metallurgical auxiliary material particles on the periphery of the finished part after the process of alternately forming the first metallurgical auxiliary material layer and the second metallurgical auxiliary material layer is finished.
According to the method for rapidly forming the metallurgical auxiliary prefabricated part in the 3D printing mode, the first metallurgical auxiliary material particles are a melting buffer material or an inoculation material, and the second metallurgical auxiliary material particles are a spheroidizing material.
According to the method for quickly forming the metallurgical auxiliary prefabricated member in the 3D printing mode, the first metallurgical auxiliary material layer is provided with the completely-melted melting layer and the unmelted bonding layer.
According to the method for rapidly forming the metallurgical auxiliary prefabricated part in the 3D printing mode, the particles of the second metallurgical auxiliary material are high-magnesium alloy or magnesium.
According to the method for rapidly forming the metallurgical auxiliary prefabricated member by adopting the 3D printing mode, when the second metallurgical auxiliary material layer is formed, the particles of the second metallurgical auxiliary material are not scanned and melted, and preferably, the particles are bonded only by utilizing the waste heat for forming the first metallurgical auxiliary material layer.
According to the method for rapidly forming the metallurgical auxiliary prefabricated part by adopting the 3D printing mode, the particle sizes of the first metallurgical auxiliary material particles and the second metallurgical auxiliary material particles are larger than 0.5 mm.
According to the method for rapidly forming the metallurgical auxiliary prefabricated part in the 3D printing mode, the particle size of the first metallurgical auxiliary material is larger than that of the second metallurgical auxiliary material.
According to the method for rapidly forming the metallurgical auxiliary prefabricated part in the 3D printing mode, the energy beam is a laser beam.
A metallurgical auxiliary preform, produced by a method as described above.
The invention has the beneficial effects that:
the invention adopts a method for quickly forming a metallurgical auxiliary prefabricated part by adopting a 3D printing mode, utilizes the advantage of 3D printing quick forming, is particularly suitable for improving the manufacturing efficiency by adopting the 3D printing mode because the metallurgical auxiliary prefabricated part is placed in a ladle and only needs to have a basic shape suitable for placement or installation without high dimensional precision and complex shape, and is mainly suitable for improving the efficiency by adopting the material laying precision and scanning precision in manufacturing, so the scanning speed can be very high, the scanning power can be selected as large as possible, the material does not need to be completely melted, and most importantly, as the 3D printing can plan materials of each layer, the melting of the auxiliary material is required to be controlled in the ladle spheroidizing inoculation process in metallurgy, the slow release of the material is required to be controlled while the material is prevented from being washed by molten iron, the buffer time is provided for the pouring of molten iron, particularly for magnesium-containing spheroidizing materials, magnesium is easy to gasify and burn, the release of the spheroidizing materials is controlled to ensure that molten iron poured later can be fully spheroidized, and the magnesium loss is reduced, so that the melting and releasing process of a prefabricated member in the molten iron is regulated and controlled by planning interlayer composition while a metallurgical auxiliary prefabricated member is rapidly formed, the release buffer of the easy-to-burn materials is provided by utilizing the melting time of the high-melting materials by alternating the easy-to-burn materials and the high-melting materials, although different material layers are stacked on a ladle bottom in the prior art, a buffer layer containing a complete metallurgical layer is not prefabricated, and the real effective buffer cannot be realized actually, in the scheme of the invention, the first metallurgical auxiliary material layer at least has the completely melted layer by controlling energy beam processing parameters, such a melting layer provides a more dense protection, and the melting depth of the melting layer is also controllable by controlling the parameters of the energy beam, so that the first metallurgical auxiliary material layer preferably has a completely melted melting layer and an unmelted binder layer, thereby controlling the thermal shock of the energy beam to avoid burning loss of the effective element (Mg) in the adjacent layer, such as a magnesium-containing spheroidizing material, and the release of the second metallurgical auxiliary material having a low melting point is changed into multiple stages by alternately stacking the first metallurgical auxiliary material layer and the second metallurgical auxiliary material layer, thereby substantially improving the buffering effect.
Drawings
FIG. 1 is a schematic process diagram of a method for rapidly forming a metallurgical auxiliary preform by 3D printing according to the present invention.
FIG. 2 is a schematic diagram of a layered structure of a metallurgical auxiliary preform rapidly formed by a 3D printing method according to the present invention.
FIG. 3 is a schematic view of a metallurgical auxiliary preform strip packaging structure rapidly formed by a 3D printing method according to the present invention.
The components represented by the reference numerals in the figures are:
10 a first metallurgical auxiliary material layer, 11 a bonding layer, 12 a melting layer and 20 a second metallurgical auxiliary material layer.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided so that this disclosure can be more completely understood and fully conveyed to those skilled in the art, and the present disclosure may be implemented in various forms without being limited to the embodiments set forth herein.
Example 1
Referring to fig. 1, fig. 1 is a schematic process diagram of a method for rapidly forming a metallurgical auxiliary preform by using a 3D printing method according to the present invention, and the method for rapidly forming a metallurgical auxiliary preform by using a 3D printing method according to the present embodiment includes:
material preparation
At least two different metallurgical auxiliary material particles are prepared, namely a first metallurgical auxiliary material particle and a second metallurgical auxiliary material particle, wherein the 'at least two different metallurgical auxiliary material particles' means that the material layer to be manufactured next alternately is at least two materials alternately, obviously, the material layer also comprises three layers or more, and the situation is set according to the treatment requirement of the molten iron in the production.
In this embodiment, only two materials are taken as an example, the first metallurgical auxiliary material particles are melting buffer materials, where the melting buffer materials refer to materials with the same or substantially the same components as the molten iron to be processed without special functional component design, the second metallurgical auxiliary material particles are alloy nodulizers with a magnesium content of more than 25%, and the melting point of the first metallurgical auxiliary material particles is higher than that of the second metallurgical auxiliary material particles.
Loading the first metallurgical auxiliary material particles and the second metallurgical auxiliary material particles into two different blanking hoppers, namely a first blanking hopper and a second blanking hopper, of the 3D printing equipment respectively;
model data processing
Importing a three-dimensional model of a metallurgical auxiliary prefabricated part to be manufactured into a 3D printing equipment computer, slicing the three-dimensional model by layers by adopting slicing software according to the thickness requirement of each layer, and setting the material type of each layer;
laminate manufacturing
The process is described with reference to fig. 2, and referring to fig. 2, a first blanking hopper of the computer-controlled 3D printing apparatus lays a layer of first metallurgical auxiliary material particles on a processing platform, an energy beam (laser) is controlled to scan the first metallurgical auxiliary material particles to form a first metallurgical auxiliary material layer 10, i.e. a melted buffer material layer, and the first metallurgical auxiliary material layer 10 is at least provided with a completely melted melting layer 12 by controlling processing parameters of the energy beam.
Here, at least the layer 12 with completely melted material contains the case of complete melting, but for the present embodiment, the layer of nodulizer material with high magnesium content is to be produced next, preferably as shown in fig. 2, the first layer 10 of metallurgical auxiliary material is made to have the layer 12 with completely melted material and the layer 11 with not melted binder, which in addition to improving the processing efficiency (fast scanning with large power), also enables to control the thermal shock of the energy beam to avoid burning loss of the effective nodulizing element (Mg) in the functional layer to be produced next, in the process, the larger the particle size of the first metallurgical auxiliary material particles, the easier it is to control the depth of laser melting, the traditional metal 3D printing usually uses expensive micro-nano "powder" material to obtain high compactness and performance, while the solution of the present invention, due to the main shaping, can use "particle" material, even large-particle or even bulk material, this is also an advantage of achieving a fast manufacturing and cost saving, preferably in this embodiment both the first metallurgical auxiliary material particles and the second metallurgical auxiliary material particles are of millimeter size material, the first metallurgical auxiliary material particles having a larger particle size than the second metallurgical auxiliary material particles.
Next, the height of the processing layer is switched, a second material dropping hopper of the computer-controlled 3D printing device lays a layer of particles of a second metallurgical auxiliary material on the formed first metallurgical auxiliary material layer 10 to form a second metallurgical auxiliary material layer 20, i.e. an alloy nodulizer layer, since the alloy nodulizer contains more magnesium elements, when the second metallurgical auxiliary material layer 20 is formed, the particles of the second metallurgical auxiliary material are not melted and are kept in a natural accumulation state, or the particles of the second metallurgical auxiliary material are bonded only by using the residual heat of the formed first metallurgical auxiliary material layer 10, preferably, the processing sequence between the two layers is controlled so that the particles of the second metallurgical auxiliary material can be bonded by fully using the solidified residual heat of the formed first metallurgical auxiliary material layer 10, and in addition, the non-melting scanning heating of the layer material by using an energy beam can also assist the bonding, but the scanning parameters of the energy beam are switched at this time, scanning means may not generally be necessary.
Complete the manufacture
And repeating the manufacturing of the first metallurgical auxiliary material layer 10 and the second metallurgical auxiliary material layer 20 until the manufacturing of all sliced layers is completed, and forming a metallurgical auxiliary preform comprising the first metallurgical auxiliary material layer 10 and the second metallurgical auxiliary material layer 20 which are alternately distributed.
Because the metallurgical auxiliary prefabricated member is placed in the ladle, the metallurgical auxiliary prefabricated member only needs to have a basic shape suitable for placement or installation, and does not need harsh dimensional accuracy and complex shape, the method for quickly forming the metallurgical auxiliary prefabricated member by adopting the 3D printing mode in the embodiment utilizes the advantage of quick forming of the 3D printing mode, so the method is particularly suitable for improving the manufacturing efficiency by adopting the 3D printing mode, and the material laying accuracy and the scanning accuracy can mainly improve the efficiency in manufacturing, so the scanning speed can be very high, and the scanning power can be selected as large as possible.
In the scheme of the embodiment, the melting buffer material layer at least has a completely melted melting layer by controlling energy beam processing parameters, and the melting layer provides more compact protection, so that the alloy nodulizer layer of the inner layer can be further exposed by melting in molten iron, therefore, the melting layer has better buffering effect, and the melting depth of the melting layer is controllable by controlling the energy beam parameters, the molten buffer material layer and the alloy nodulizer layer are alternately produced by overlapping a plurality of layers, the release of the nodulizer in the core water is changed into a plurality of interrupted stages, the time is gained for the full dispersion of the ladle and the nodulizer, and the nodulizing effect is ensured.
Example 2
This embodiment is substantially further improved based on embodiment 1, and referring to fig. 3, fig. 3 is a schematic diagram of a metallurgical auxiliary preform belt packaging structure for rapid prototyping by 3D printing according to the present invention, that is, the method in embodiment 1 further includes a material packaging operation, and in this embodiment, the packaging means that the contour material is completely melted, so that a melting buffer can be formed around the entire contour when the preform contacts molten iron, and the material packaging ensures that the physical state and chemical properties of the preform are substantially stable before use, especially during storage and transportation or packaging, and generally, the material packaging is formed by completely melting the particles of the metallurgical auxiliary material in the current layer during the process of alternately forming the first metallurgical auxiliary material layer 10 and the second metallurgical auxiliary material layer 20, and generally, the melting only in the contour portion does not have a great influence on the spheroidizing agent material containing magnesium, but also to minimize this effect by controlling the scan parameters.
Alternatively, after the process of alternately forming the first metallurgical auxiliary material layer 10 and the second metallurgical auxiliary material layer 20 is completed, the first metallurgical auxiliary material particles having a melting buffer function are preferably formed on the periphery of the completed part by using layer-by-layer paving and scanning melting of one of the metallurgical auxiliary material particles.
Example 3
This example differs from example 1 in that the first metallurgical auxiliary material particles are changed from molten buffer material to inoculation material and the second metallurgical auxiliary material remains unchanged as spheroidized material.
For the smelting of spheroidal graphite cast iron, examples of inoculating materials are ferrosilicon inoculating alloys or iron-based alloys containing carbides, which have higher melting points than spheroidizing materials and do not contain materials which are easy to gasify and burn out, and therefore can directly replace molten buffer materials, so that the manufactured metallurgical auxiliary preform has both inoculating and spheroidizing effects.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. Method for rapidly forming metallurgical auxiliary prefabricated part by adopting 3D printing mode is characterized by comprising the following steps:
material preparation
Preparing at least two different metallurgical auxiliary material particles, namely a first metallurgical auxiliary material particle and a second metallurgical auxiliary material particle, wherein the first metallurgical auxiliary material particle and the second metallurgical auxiliary material particle are selected from a melting buffer material, a spheroidizing material, an inoculation material or a refining material in metallurgy, the first metallurgical auxiliary material particle is a high-melting point material, the second metallurgical auxiliary material particle is a low-melting point material, and the first metallurgical auxiliary material particle and the second metallurgical auxiliary material particle are respectively loaded into two different blanking hoppers, namely a first blanking hopper and a second blanking hopper, of a 3D printing device;
model data processing
Importing a three-dimensional model of a metallurgical auxiliary prefabricated part to be manufactured into a 3D printing equipment computer, slicing the three-dimensional model by layers by adopting slicing software according to the thickness requirement of each layer, and setting the material type of each layer;
laminate manufacturing
The computer controls a first blanking hopper of the 3D printing device to lay a layer of first metallurgical auxiliary material particles on the processing platform, controls an energy beam to scan the first metallurgical auxiliary material particles to form a first metallurgical auxiliary material layer (10), enables the first metallurgical auxiliary material layer (10) to have at least a completely melted melting layer (12) by controlling energy beam processing parameters, then controls a second blanking hopper of the 3D printing device to lay a layer of second metallurgical auxiliary material particles on the formed first metallurgical auxiliary material layer (10) to form a second metallurgical auxiliary material layer (20), wherein when the second metallurgical auxiliary material layer (20) is formed, the second metallurgical auxiliary material particles are not melted and are kept in a natural accumulation state or are bonded only by using the waste heat of the formed first metallurgical auxiliary material layer (10), or only scanning and heating the film;
complete the manufacture
And repeating the manufacturing of the first metallurgical auxiliary material layer (10) and the second metallurgical auxiliary material layer (20) until the manufacturing of all sliced layers is completed, and forming a metallurgical auxiliary prefabricated member comprising the first metallurgical auxiliary material layer (10) and the second metallurgical auxiliary material layer (20) which are alternately distributed.
2. The method for rapidly forming the metallurgical auxiliary preform by adopting the 3D printing mode is characterized by further comprising a material package, wherein the material package is formed by completely melting the particles of the metallurgical auxiliary material of the current layer at the contour part of the current layer in the process of alternately forming the first metallurgical auxiliary material layer (10) and the second metallurgical auxiliary material layer (20), or is formed by paving the particles of the metallurgical auxiliary material of one type layer by layer and scanning and melting the particles of the metallurgical auxiliary material at the periphery of the completed part after the process of alternately forming the first metallurgical auxiliary material layer (10) and the second metallurgical auxiliary material layer (20) is completed.
3. The method for rapid prototyping of metallurgical auxiliary preforms using 3D printing as set forth in claim 1 wherein the particles of the first metallurgical auxiliary material are a molten buffer material or an inoculating material and the particles of the second metallurgical auxiliary material are a spheroidized material.
4. A method for rapid prototyping of a metallurgical auxiliary preform by 3D printing as set forth in claim 3 wherein the first layer of metallurgical auxiliary material (10) has a fully melted layer (12) and an unmelted consolidated layer (11).
5. The method for rapidly forming the metallurgical auxiliary preform by the 3D printing method according to claim 4, wherein the particles of the second metallurgical auxiliary material are high magnesium alloy or magnesium.
6. Method for rapid prototyping of metallurgical auxiliary preforms by 3D printing according to claim 5 characterised in that the second metallurgical auxiliary material layer (20) is formed without scanning and melting of the particles of the second metallurgical auxiliary material, preferably by bonding only with the residual heat of the forming first metallurgical auxiliary material layer (10).
7. The method for rapidly forming the metallurgical auxiliary preform by 3D printing according to claim 1, wherein the first metallurgical auxiliary material particles and the second metallurgical auxiliary material particles are larger than 0.5mm in diameter.
8. The method for rapidly forming the metallurgical auxiliary preform by 3D printing according to claim 7, wherein the particle size of the first metallurgical auxiliary material is larger than that of the second metallurgical auxiliary material.
9. The method for rapidly forming the metallurgical auxiliary preform by 3D printing according to claim 1, wherein the energy beam is a laser beam.
10. A metallurgically assisted preform made by the method of claim 1.
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| CN112548118B (en) | 2023-02-17 |
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