Directional additive forming method based on ultrasonic regulation and control and metal block

Abstract

The invention relates to the technical field of additive manufacturing, in particular to a directional additive forming method based on ultrasonic regulation and control, which comprises the following steps of: filling metal powder in a mold, pressing the metal powder in the mold by adopting a pressurizing module, arranging a plurality of first ultrasonic vibrators on the pressurizing module, enabling each first ultrasonic vibrator to be in contact with the metal powder in the mold; setting working parameters of each first ultrasonic vibrator according to the property of the metal powder, wherein the working parameters comprise ultrasonic starting time, ultrasonic ending time, ultrasonic power, ultrasonic amplitude and ultrasonic frequency; and the pressurizing pressure of the pressurizing module is kept, all the first ultrasonic vibrators are started to heat the metal powder according to the set working parameters, the metal powder in the mold is directionally formed according to the set sequence, and a metal block is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to a directional additive molding method and a metal block based on ultrasonic regulation. Background Art

[0002] Aluminum alloys, titanium alloys and amorphous alloys are all materials that can be used to produce parts with specific properties and shapes through the die casting process.

[0003] Aluminum alloys are very suitable for forming parts with complex shapes due to their good fluidity and castability. However, aluminum alloys will produce pores and shrinkage defects during the die casting process, which will affect their mechanical properties and surface quality. In addition, aluminum alloys have a high tendency to hot cracking and have higher requirements for molds.

[0004] Titanium alloys are widely used in aerospace, medical and chemical fields due to their excellent specific strength, high temperature resistance and corrosion resistance. Die casting of titanium alloys can bring good mechanical properties and corrosion resistance, but the high melting point and strong chemical activity make the die casting process difficult. At high temperatures, titanium alloys easily react with mold materials, which leads to mold loss and surface defects of molded parts.

[0005] Amorphous alloys (metallic glasses) are valued for their high strength, high hardness and excellent elasticity. For amorphous materials, the difficulty lies in efficient heating and cooling to achieve the amorphous state of the material. Although die-casting of amorphous alloys can produce parts with complex shapes, the current die-casting method mainly heats the entire mold. This heating method has a slow heating speed and the amorphous alloy located in the internal position cannot be cooled down in time, resulting in the problem of crystallization of the amorphous alloy, which affects the performance of the amorphous alloy. Summary of the invention

[0006] The purpose of the present invention is to avoid the shortcomings of the prior art and provide a directional additive manufacturing method based on ultrasonic regulation. This method can effectively control the heating speed and heating position during the die-casting process, so that the metal powder can form grains and cool in time, thereby improving the quality of metal powder molding.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] Provided is a method for directional additive manufacturing based on ultrasonic regulation, comprising the following steps:

[0009] Filling metal powder into a mold, using a pressurizing module to press the metal powder in the mold, and arranging a plurality of first ultrasonic vibrators on the pressurizing module so that each first ultrasonic vibrator contacts the metal powder in the mold;

[0010] Setting working parameters of each first ultrasonic vibrator according to the properties of the metal powder, wherein the working parameters include ultrasonic start time, ultrasonic end time, ultrasonic power, ultrasonic amplitude and ultrasonic frequency;

[0011] The pressurizing pressure of the pressurizing module is maintained, and each first ultrasonic vibrator is started to heat the metal powder according to the set working parameters, so that the metal powder in the mold is directionally formed according to the set sequence to obtain a metal block.

[0012] In some embodiments, when forming a bulk amorphous alloy, the metal powder region is divided into an inner region, a middle region, and an outer region arranged sequentially from the inside to the outside, and the heating stage of the metal powder is regulated by controlling the first ultrasonic vibrator, including:

[0013] The first stage: the heating temperature is regulated to decrease from the inner area to the outside;

[0014] The second stage: regulating the heating temperature to decrease from the inner area to the middle area, and from the middle area to the outer area, wherein the heating temperature of the outer area is higher than the heating temperature of the inner area;

[0015] The third stage: regulating the heating temperature to increase from the inner area to the outer area;

[0016] Among them, the maximum heating temperature of each area is the same.

[0017] In some embodiments, the plurality of first ultrasonic vibrators are distributed on the pressurizing module in a matrix.

[0018] In some embodiments, a second ultrasonic vibrator is disposed at the bottom of the mold, and before the pressurizing module is pressed together, the second ultrasonic vibrator is activated to eliminate gaps between metal powders.

[0019] In some embodiments, the mold is placed in a temperature control module. When the metal powder is heated, the temperature control module is heated up to heat the mold. When the metal block is cooled, the temperature control module is cooled down to cool the mold.

[0020] The temperature control module has a temperature rise range of 100 to 800°C and a temperature drop range of -75 to 0°C.

[0021] In some embodiments, the working time of each stage of the first ultrasonic vibrator is 40 to 80 seconds.

[0022] In some embodiments, the mold is placed in an atmosphere protective environment, and the atmosphere includes nitrogen, argon or carbon dioxide.

[0023] In some embodiments, the ultrasonic power of the first ultrasonic vibrator is 100W to 2000W, the ultrasonic amplitude is 1 μm to 50 μm, and the ultrasonic frequency is 17 kHz to 28 kHz.

[0024] In some embodiments, the pressure range of the pressurizing module is 1 MPa to 500 MPa.

[0025] Beneficial effects of the ultrasonic-controlled directional additive manufacturing method of the present invention:

[0026] The ultrasonically controlled directional additive manufacturing method of the present invention sets a plurality of first ultrasonic vibrators on the surface of the metal powder during die-casting of the metal powder. The first ultrasonic vibrators can, on the one hand, induce rapid temperature rise due to particle friction of the metal powder, thereby achieving rapid melting of the material and facilitating the production of grains of the metal material. On the other hand, by regulating the working sequence and vibration parameters of the first ultrasonic vibrators, the different heating temperatures of the metal powder in the entire mold can be quickly and accurately controlled, thereby achieving gradient melting-solidification of the amorphous alloy from the inside to the outside in the mold, thereby ensuring the formation process of the amorphous state, overcoming the problems of inconsistent cooling and low cooling efficiency caused by uneven heat dissipation speed in the mold, and effectively improving the quality of die-casting of the metal powder in the mold.

[0027] (1) The ultrasonically controlled directional additive manufacturing method of the present invention can effectively control the molding order of metal powder in the mold by regulating the first ultrasonic vibrator, realize the layer-by-layer welding connection of metal powder, improve the quality of die-cast metal powder in the mold, and avoid the problem of crystallization caused by simultaneous heating in the mold and different cooling speeds after the heat source is disconnected at the same time.

[0028] Also provided is a metal block, which is produced by the above-mentioned directional additive manufacturing method based on ultrasonic regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a working state diagram of the first ultrasonic vibrator of Example 1 before and during ultrasonic heating.

[0030] Figure 2 1 is a top view of the arrangement of the first ultrasonic vibrators of Example 1.

[0031] Figure 3 This is a diagram showing the working states of the first ultrasonic vibrator in each stage of Experimental Example 3.

[0032] Figure 4 1 is a working status diagram of the temperature control module and the mold of Example 1.

[0033] Figure 5 This is the molded zirconium-based amorphous alloy block of Test Example 3.

[0034] Figure 63 is the XRD pattern of the zirconium-based amorphous alloy bulk of Experimental Example 3.

[0035] Figure 7 This is a hardness comparison chart of the zirconium-based amorphous alloy block obtained by ultrasonic die casting in Experimental Example 3 and the zirconium-based amorphous alloy block obtained by die casting in Comparative Example 1.

[0036] Figure 8 This is a comparison diagram of the pores of the zirconium-based amorphous alloy block obtained by ultrasonic die casting in Experimental Example 3 and the zirconium-based amorphous alloy block obtained by die casting in Comparative Example 1. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0038] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" used in the present invention and the appended claims are intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0039] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] Example 1

[0041] The directional additive manufacturing method based on ultrasonic regulation disclosed in this embodiment is as follows: Figure 1-2 , Figure 4 As shown, the following steps are included:

[0042] Filling metal powder into a mold, using a pressurizing module to press the metal powder in the mold, and arranging a plurality of first ultrasonic vibrators on the pressurizing module so that each first ultrasonic vibrator contacts the metal powder in the mold;

[0043] Specifically, the pressurizing module compacts the metal powder in the mold to form it. When the first ultrasonic vibrator is arranged on the pressurizing module, the first ultrasonic vibrator can vibrate and heat-melt the metal powder when compacting the metal powder.

[0044] Setting working parameters of each first ultrasonic vibrator according to the properties of the metal powder, wherein the working parameters include ultrasonic start time, ultrasonic end time, ultrasonic power, ultrasonic amplitude and ultrasonic frequency;

[0045] Specifically, since the properties of different metal powders are different, in order to obtain the target metal block, the working parameters of the first ultrasonic vibrator must be set according to the characteristics of the metal powder. For example, when preparing a titanium alloy block or a stainless steel block, the first ultrasonic vibrator is started from left to right or from top to bottom to control the growth of the metal layer by layer. For example, the growth of the grain is regulated.

[0046] For another example, for amorphous alloys, it is necessary to ensure that the molding cooling in the middle position reaches a certain speed. If the heating and disconnection are performed at the same time, the cooling rate in the middle position will be lower than that at the edge, resulting in the formation of crystallization, which affects the performance of the amorphous alloy block. That is, the middle position is heated first, then it cools down quickly, and then the metal powder at the edge is slowly heated and then quickly cooled.

[0047] That is, during the implementation process, for different metal powders, such as titanium alloy or amorphous alloy, specific strategies are needed to control the start-up sequence of the ultrasonic vibrator and the heating and cooling process to ensure the growth of each metal layer and the cooling rate in the middle to avoid the formation of crystallization, thereby ensuring the performance of the amorphous alloy block.

[0048] This directional additive manufacturing method based on ultrasonic regulation can achieve the production of high-precision and complex-shaped metal parts by precisely controlling the working parameters of the ultrasonic vibrator. It is particularly suitable for the manufacturing of metal blocks with high performance requirements.

[0049] The pressurizing pressure of the pressurizing module is maintained, and each first ultrasonic vibrator is started to heat the metal powder according to the set working parameters, so that the metal powder in the mold is directionally formed according to the set sequence to obtain a metal block.

[0050] Specifically, after the first ultrasonic vibrator is activated, the metal block can be formed in a set direction.

[0051] Ultrasonic welding is a process in which an ultrasonic generator converts high-frequency electrical energy into high-frequency mechanical vibration energy and transmits it to the welding head (i.e., welding tool). The welding head transmits the high-frequency ultrasonic vibration energy of the first ultrasonic vibrator to the metal powder, causing the metal powder to generate high-frequency friction heat, thereby rapidly softening or melting, and achieving material connection.

[0052] Ultrasonic vibration is combined with die-casting. Ultrasound is used to provide the main heat source in the die-casting process of the material. The stress constraint in the die-casting process is achieved through the mold. The melting of the powder material is achieved by pressurizing the ultrasonic vibration pressure head. The ambient temperature is controlled by the mold peripheral environmental control system to finally obtain the ultrasonic compression molding material.

[0053] like Figure 2 As shown, the plurality of first ultrasonic vibrators are distributed on the pressurizing module in a matrix, and the first ultrasonic vibrators distributed in the matrix can be evenly distributed on the surface of the compacted metal powder.

[0054] A second ultrasonic vibrator is arranged at the bottom of the mold, and before the pressurizing module is pressed, the second ultrasonic vibrator is started to eliminate the gaps between the metal powders and improve the quality of the metal block. The ultrasonic power range of the second ultrasonic vibrator is 100-2000W, the ultrasonic amplitude is 1-50μm, and the ultrasonic frequency is 17-28kHz.

[0055] like Figure 4 As shown, the mold is placed in a temperature control module. When the metal powder is heated, the temperature control module is heated to heat the mold. When the metal block is cooled, the temperature control module is cooled to cool the mold. The temperature rising range of the temperature control module is 100°C to 800°C, and the temperature dropping range is -75 to 0°C.

[0056] Specifically, by adding a temperature control module, the mold can be assisted in heating so that the metal powder can be melted, and the temperature control module can also cool the mold so that the metal powder can be cooled.

[0057] The mold is placed in an atmosphere protection environment, the atmosphere includes nitrogen, argon or carbon dioxide. The die casting environment is protected by atmosphere, or the die casting system is placed in a vacuum device and pressurized by a pressurizing module with ultrasonic vibration. Inert gases such as nitrogen / argon / carbon dioxide are used for atmosphere protection, or the system is placed inside a large vacuum chamber.

[0058] The ultrasonic power of the first ultrasonic vibrator is 100W to 2000W, the ultrasonic amplitude is 1 μm to 50 μm, and the ultrasonic frequency is 17 kHz to 28 kHz.

[0059] The pressure range of the pressurizing module is 1MPa to 500MPa.

[0060] After the metal block is obtained, the pressure is unloaded at an unloading speed of 1 to 50 MPa / min to take out the die-cast parts.

[0061] Example 2

[0062] To further illustrate how to synthesize a metal block, this embodiment discloses the following contents:

[0063] When forming a bulk amorphous alloy, the metal powder region is divided into an inner region, a middle region and an outer region arranged in sequence from the inside to the outside, and the heating stage of the metal powder is regulated by controlling the first ultrasonic vibrator, including: Figure 3 As shown,

[0064] The first stage: the heating temperature is regulated to decrease from the inner area to the outside;

[0065] Specifically, the vibration frequency of the first ultrasonic vibrator in the inner region is higher than that in the middle region, and the vibration frequency of the first ultrasonic vibrator in the middle region is higher than that in the outer region. At this time, the metal powder in the inner region melts first, followed by the middle region, and finally the outer region.

[0066] The second stage: regulating the heating temperature to increase from the inner area to the middle area, and to decrease from the middle area to the outer area, wherein the heating temperature of the outer area is higher than the heating temperature of the inner area;

[0067] Specifically, the vibration frequency of the first ultrasonic vibrator located in the inner area is lower than that in the middle area, while the vibration frequency of the first ultrasonic vibrator located in the middle area is higher than that in the outer area. At this time, the melted metal powder in the inner area solidifies and cools in advance, and then the metal powder in the middle area melts before the metal powder in the outer area, and finally the metal powder in the outer area melts.

[0068] The third stage: regulating the heating temperature to increase from the inner area to the outer area;

[0069] Specifically, the vibration frequency of the first ultrasonic vibrator located in the inner area is lower than that in the middle area, and the vibration frequency of the first ultrasonic vibrator located in the middle area is also lower than that in the outer area. At this time, the metal powder of the outermost layer is melted, while the metal powder of the inner layer is cooled, thereby avoiding the problem of the inner layer metal not being cooled in time and affecting the quality.

[0070] Among them, the highest heating temperature of each area is the same, so that the grains in each area can be kept the same in the end.

[0071] The working time of each stage of the first ultrasonic vibrator is 40 to 80 seconds. For example, the heating time of the first stage, the second stage and the third stage is 1 minute respectively.

[0072] Test Example 1

[0073] Aluminum Alloy

[0074] Apply a release agent inside the mold, add ADC10 aluminum alloy powder with a particle size of 75-150μm into the mold, and then load vibration (or ultrasonic vibration) at the bottom of the mold to reduce the internal gap. The mold is made of skd11 steel. The die casting mold size is diameter Depth 20mm. Ultrasonic power for mixing 200W, ultrasonic amplitude 5μm, ultrasonic frequency 28kHz;

[0075] Load the mold into the temperature control module and adjust the temperature of the temperature control module. The temperature control module uses a heating module. The heating temperature is 200℃.

[0076] Vacuum / atmosphere environment construction-pressurization. The die casting environment is protected by argon atmosphere. The pressurization module with ultrasonic vibration is used for pressurization. The pressure range is 200MPa.

[0077] Maintain the pressure and achieve the melt-mixing integration of materials by changing the ultrasonic power. Keep the strength unchanged after pressurization, and start the ultrasonic vibration to heat and mold the material. Ultrasonic power 500W, ultrasonic amplitude 3μm, ultrasonic frequency 20kHz; ultrasonic action time 100s;

[0078] Unload the pressure at an unloading rate of 20 MPa / min.

[0079] Demould and take out the die-cast parts.

[0080] Test Example 2

[0081] Titanium Alloy

[0082] Apply a release agent inside the mold, add TC4 titanium alloy powder with a particle size of 15-53μm into the mold, and then load vibration (or ultrasonic vibration) at the bottom of the mold to reduce the internal gap. The mold is made of skd11 steel. The die-casting mold size is diameter Depth 20mm. Ultrasonic power for mixing 100W, ultrasonic amplitude 3μm, ultrasonic frequency 28kHz;

[0083] Load the temperature control module. Load the mold into the temperature control module and adjust the temperature of the temperature control module. The temperature control module uses a heating module. The heating temperature is 100℃.

[0084] Vacuum / atmosphere environment construction-pressurization. The die casting environment is protected by argon atmosphere. The pressurization module with ultrasonic vibration is used for pressurization. The pressure range is 100MPa.

[0085] Maintain the pressure and achieve the melt-mixing integrated molding of the material by changing the ultrasonic power. Keep the strength unchanged after pressurization, and start the ultrasonic vibration to heat and mold the material. Ultrasonic power 1000W, ultrasonic amplitude 5μm, ultrasonic frequency 17kHz; ultrasonic action time 120s;

[0086] Unload the pressure at an unloading rate of 10 MPa / min.

[0087] Demould and take out the die-cast parts.

[0088] Test Example 3

[0089] Amorphous alloy

[0090] A release agent is applied inside the mold, and V105s amorphous alloy powder with a particle size of 15μm to 53μm is added to the mold. A second ultrasonic vibrator is used at the bottom of the mold to reduce internal voids. The second ultrasonic vibrator has an ultrasonic power of 300W, an ultrasonic amplitude of 5μm, and an ultrasonic frequency of 35kHz. The mold is made of pure copper, and the die-casting mold size is 20mm in diameter and 20mm in depth.

[0091] The mold is loaded into the temperature control module to adjust the temperature of the temperature control module. The temperature control module adopts the cooling mode and can cool the temperature to -60℃.

[0092] The die casting environment is protected by an argon atmosphere. A pressurizing module with a first ultrasonic vibrator is used for pressurization, and the pressure range of the pressurizing module is 300 MPa.

[0093] The melt-mixing integrated molding of the material is achieved by controlling the working parameters of the first ultrasonic vibrator. Specifically, the strength is kept unchanged after pressurization, and the first ultrasonic vibrator is started to heat and mold the material.

[0094] like Figure 3 As shown, a 5x5 matrix array ultrasound is used for forming. In the matrix area a33, a34, a43, and a44, the four first ultrasonic vibrators have a power of 2500W, an ultrasonic amplitude of 5μm, and an ultrasonic frequency of 28kHz; the matrix a22, a23, a24, a25, a32, a35, a42, a45, a52, a53, a54, and a55 have a total of 12 vibrators with a power of 2000W and an amplitude of 4μm. The remaining vibrators have a power of 1800w, an amplitude of 2μm, and an action time of 60s;

[0095] Then turn off the four first ultrasonic vibrators a33, a34, a43, and a44, and adjust the power of the 12 first ultrasonic vibrators in the matrix a22, a23, a24, a25, a32, a35, a42, a45, a52, a53, a54, and a55 to 2500W and 5μm amplitude. Adjust the power of the remaining first ultrasonic vibrators to 2000W and 4μm amplitude, and load for 80s;

[0096] Turn off the 12 first ultrasonic vibrators a22, a23, a24, a25, a32, a35, a42, a45, a52, a53, a54, and a55. At the same time, the four ultrasonic vibrators a33, a34, a43, and a44 are also kept turned off. Adjust the power of the remaining ultrasonic vibrators to 2500 W, the amplitude to 5 μm, and act for 120 s.

[0097] The switching time of the ultrasonic vibrator is 0.05s.

[0098] Unload the pressure at an unloading rate of 10 MPa / min.

[0099] Demould and take out the die-cast parts. Figure 5 As shown, a zirconium-based amorphous alloy block is obtained. Figure 6 As shown, the zirconium-based amorphous alloy block is specifically amorphous

[0100] Comparative Example 1: The difference between this comparative example and Experimental Example 3 is that the pressurizing module of Comparative Example 1 does not add ultrasound of the matrix array.

[0101] Figure 7 As shown, the hardness of the ultrasonic die-cast amorphous alloy in Experimental Example 3 is higher than that in Comparative Example 1. Figure 8 As shown, the pores of the ultrasonic die-cast amorphous alloy of Test Example 3 are less than those of the comparative example. It can be seen that the present invention effectively improves the performance of the amorphous alloy through ultrasonic die-casting.

[0102] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0103] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0104] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0105] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for directional additive manufacturing based on ultrasonic regulation, characterized in that: The following steps are involved: Filling metal powder into a mold, using a pressurizing module to press the metal powder in the mold, and arranging a plurality of first ultrasonic vibrators on the pressurizing module so that each first ultrasonic vibrator contacts the metal powder in the mold; Setting working parameters of each first ultrasonic vibrator according to the properties of the metal powder, wherein the working parameters include ultrasonic start time, ultrasonic end time, ultrasonic power, ultrasonic amplitude and ultrasonic frequency; The pressurizing pressure of the pressurizing module is maintained, and each first ultrasonic vibrator is started to heat the metal powder according to the set working parameters, so that the metal powder in the mold is directionally formed according to the set sequence to obtain a metal block.

2. The method for directional additive manufacturing based on ultrasonic regulation according to claim 1, characterized in that: When forming a bulk amorphous alloy, the metal powder region is divided into an inner region, a middle region and an outer region arranged in sequence from the inside to the outside, and the heating stage of the metal powder is regulated by controlling the first ultrasonic vibrator, including: The first stage: the heating temperature is regulated to decrease from the inner area to the outside; The second stage: regulating the heating temperature to decrease from the inner area to the middle area, and from the middle area to the outer area, wherein the heating temperature of the outer area is higher than the heating temperature of the inner area; The third stage: regulating the heating temperature to increase from the inner area to the outer area; Among them, the maximum heating temperature of each area is the same.

3. The method for directional additive manufacturing based on ultrasonic regulation according to claim 1, characterized in that: The plurality of first ultrasonic vibrators are distributed on the pressurizing module in a matrix.

4. The method for directional additive manufacturing based on ultrasonic regulation according to claim 1, characterized in that: A second ultrasonic vibrator is arranged at the bottom of the mold, and before the pressurizing module is pressed together, the second ultrasonic vibrator is started to eliminate gaps between metal powders.

5. The method for directional additive manufacturing based on ultrasonic regulation according to claim 1, characterized in that: The mold is placed in a temperature control module. When the metal powder is heated, the temperature control module is heated up to heat the mold. When the metal block is cooled, the temperature control module is cooled down to cool the mold. The temperature control module has a temperature rise range of 100 to 800°C and a temperature drop range of -75 to 0°C.

6. The method for directional additive manufacturing based on ultrasonic regulation according to claim 2, characterized in that: The working time of each stage of the first ultrasonic vibrator is 40 to 80 seconds.

7. The method for directional additive manufacturing based on ultrasonic regulation according to claim 1, characterized in that: The mold is placed in an atmosphere protection environment, wherein the atmosphere includes nitrogen, argon or carbon dioxide.

8. The method for directional additive manufacturing based on ultrasonic regulation according to claim 1, characterized in that: The ultrasonic power of the first ultrasonic vibrator is 100W to 2000W, the ultrasonic amplitude is 1 μm to 50 μm, and the ultrasonic frequency is 17 kHz to 28 kHz.

9. The method for directional additive manufacturing based on ultrasonic regulation according to claim 1, characterized in that: The pressure range of the pressurizing module is 1MPa to 500MPa.

10. A metal block, characterized in that: It is produced by the directional additive manufacturing method based on ultrasonic regulation as described in any one of claims 1 to 9.

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