High-flux additive manufacturing device and method for adjusting and controlling alloy components through wire pre-coating solute

Abstract

The invention provides a high-flux additive manufacturing device and method for adjusting and controlling alloy components through wire pre-coating solute, and belongs to the field of alloy manufacturing, and the high-flux additive manufacturing device comprises a wire feeding mechanism for storing a wire and pulling out the wire from the wire feeding mechanism; the printing module is used for carrying out additive manufacturing by using metal wires; the pre-coating assembly is arranged between the wire feeding mechanism and the printing module; wherein the metal wire is pulled out of the wire feeding mechanism, passes through the pre-coating assembly and then is introduced into the printing module, and the surface of the metal wire passing through the pre-coating assembly is coated with a solute coating through the pre-coating assembly. The solute coating with the preset thickness and length is pre-coated at the specified position of the surface of the conventional metal wire as required, the solute coating is a solute element required by the alloy, the content of the solute element in the alloy can be dynamically regulated and controlled, and the solute content is regulated and controlled by coating the solute coating on the conventional wire as required; and metal wires with special components do not need to be customized in batches, so that the production cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy manufacturing, and particularly to a high-throughput additive manufacturing device and method for regulating alloy composition by pre-coating solutes on wire materials. Background Art

[0002] The directed energy deposition additive manufacturing technology has advantages such as high material utilization rate, high efficiency, and the ability to form large components, and has been widely used in fields such as aerospace. Among them, in the wire feeding deposition additive manufacturing technology, the wire material utilization rate can reach more than 95%, and it also has advantages such as strong multi-material compatibility and flexible equipment expansion.

[0003] However, the wire feeding deposition additive manufacturing technology usually uses metal wire materials with fixed compositions, commonly general brand wire materials, and cannot dynamically regulate the alloy composition, making it difficult to achieve on-demand composition regulation or composition gradient distribution of additive manufacturing components. For example, to study the influence of the content of element A on the printing formability, mechanical properties, corrosion resistance, etc. of a certain material, multiple wire materials with different A contents are required. However, custom-made wire materials usually have a large mass (at least several hundred kilograms), high cost, and long cycle, making it difficult to adapt to high-throughput forming under variable composition conditions; in a certain component, some parts require higher contents of certain rare and precious metals, while other parts only require ordinary brand compositions, and the traditional wire feeding deposition additive manufacturing technology is also difficult to achieve local regulation; some compositions are brittle and cannot be drawn into wires, but reducing the content of certain solutes can improve the formability and prepare wire materials, but a synchronous addition method needs to be used to compensate for some components.

[0004] The existing invention patent with the application number CN202410909110.3 proposes an arc-oscillation laser additive manufacturing device and method for wire-fan ratio fusion. By using wire materials and powder materials with different element compositions, adjusting the wire feeding speeds of different wire materials and the powder feeding speeds of different powder materials, different proportion compositions are adjusted between wire materials, between powder materials, and between wire and powder, thereby regulating the tissue composition. However, the above technical solution uses a multi-channel feeding method for additive manufacturing, and the wire materials and powders in each channel still have fixed compositions, and a large amount of wire materials with fixed compositions still need to be prefabricated. Moreover, some compositions cannot be drawn into wires due to poor plasticity; in addition, the arc heat source is likely to blow the powder out of the molten pool, affecting the final composition. Therefore, the above method is not a general method for regulating composition, and it does not solve problems such as precise element regulation (such as adding 0.1% solute element to a certain general brand wire material), large mass, high cost, and long cycle of custom-made wire materials, and it is difficult to dynamically regulate the alloy composition or local composition during the additive manufacturing process. Summary of the Invention

[0005] In view of this, the present invention proposes a high-throughput additive manufacturing device and method for regulating alloy composition by pre-coating solute on wire, which is used to solve the problem that the current wire feeding deposition additive manufacturing technology cannot accurately regulate the solute elements in the alloy composition.

[0006] The technical solution of the present invention is implemented as follows: The present invention provides a high-throughput additive manufacturing device for pre-coating wire with solute to regulate alloy composition, including a wire feeding mechanism, which stores wires and pulls out metal wires therefrom; a printing module, which uses metal wires for additive manufacturing; and a pre-coating component, which is arranged between the wire feeding mechanism and the printing module; wherein the metal wire is pulled out from the wire feeding mechanism and introduced into the printing module after passing through the pre-coating component, and the pre-coating component applies a solute coating on the surface of the metal wire passing therethrough.

[0007] On the basis of the above technical scheme, preferably, the pre-coating component includes a box body, in which the metal wire passes; a mixing mechanism, which is arranged outside the box body and stores solute slurry; a grouting head, which is arranged in the box body and is located directly above the metal wire; at least two rollers, which are arranged in the box body and are symmetrically arranged up and down to clamp the metal wire; a drying box, which is arranged between the box body and the printing module; wherein the mixing mechanism is connected to the grouting head and conveys the solute slurry to the grouting head; the grouting head is aligned with the roller and conveys the solute slurry; the roller rolls on the metal wire and applies the solute slurry on the surface of the metal wire; the drying box dries the solute slurry coated on the surface of the metal wire, so that the surface of the metal wire is solidified to form a solute coating.

[0008] More preferably, the alloy composition includes a main material element and a solute element; the metal wire is made of the main material element, and the solute coating is made of the solute element.

[0009] More preferably, the components of the solute slurry include, by mass percentage, 70% to 90% solute element powder and 10% to 30% binder, the solute element powder and the binder are put into a mixing mechanism and mixed to form a solute slurry; the drying oven dries the solute slurry and removes the binder.

[0010] More preferably, the pre-coating assembly includes at least two pairs of rollers, two grouting heads and two mixing mechanisms, each group of rollers, grouting heads and mixing mechanisms are arranged at intervals, and each mixing mechanism stores a solute slurry of a different combination; the surface of the metal wire is coated with a solute slurry of a different combination at intervals to form several sections of solute coatings with different solute elements.

[0011] More preferably, the roller moves relative to the metal wire in a direction perpendicular to the axis of the metal wire and loses contact with the metal wire or increases the clamping force on the metal wire; the thickness of the solute coating is regulated by adjusting the clamping force of the two rollers on the metal wire, and the coating length of the solute coating on the metal wire is regulated by adjusting the contact time between the rollers and the metal wire.

[0012] More preferably, the calculation formula for the clamping force F of the roller on the metal wire is

[0013] F = [ηω(T + R)w / T]·k,

[0014] where η represents the viscosity of the solute slurry, v represents the rotational speed of the roller, w represents the effective contact width between the roller and the metal wire, T represents the thickness of the solute coating, and k is a correction factor, usually taking a value of 1 - 2.

[0015] More preferably, the calculation formula for the contact time t between the roller and the metal wire is

[0016] t = L contact / [π(T + R)n],

[0017] where L contact represents the contact arc length between the roller and the metal wire, D represents the diameter of the roller, T represents the thickness of the solute coating, and v represents the rotational speed of the roller.

[0018] Based on the above technical solutions, preferably, the metal wire is made of an alloy material, and the solute coating is made of a single element or an intermediate alloy containing solute elements.

[0019] In a second aspect, the present invention also provides a high-throughput additive manufacturing method for regulating alloy composition by pre-coating solutes on a wire. Using the above high-throughput additive manufacturing device for regulating alloy composition by pre-coating solutes on a wire, it includes the following steps: Step 1, select a metal wire according to the material composition of the target product and design the composition of the solute coating, and put the solute element powder and the binder into the mixing mechanism to mix and make a coating slurry; Step 2, adjust the clamping force of the roller on the metal wire and the contact time between the roller and the metal wire according to the designed thickness and length of the solute coating, guide the metal wire through the box body and coat the solute slurry on the surface of the metal wire, and perform degreasing, drying, and curing on the solute slurry through a drying oven to form a solute coating on the surface of the metal wire; Step 3, perform index detection on the composition, thickness, length, and uniformity of the solute coating. After passing the inspection, introduce the metal wire into the printing module to participate in additive manufacturing.

[0020] The high-throughput additive manufacturing device and method for regulating alloy composition by pre-coating solutes on a wire according to the present invention have the following beneficial effects compared with the prior art:

[0021] (1) In the present invention, a solute coating with a predetermined thickness and length is pre-coated at a designated position on the surface of a conventional metal wire. This solute coating is the solute element required for the alloy, which can dynamically regulate the content of solute elements in the alloy. Moreover, by coating the solute coating on the conventional wire as needed to regulate the solute content, there is no need to batch-customize metal wires with special compositions, which greatly reduces the production cost.

[0022] (3) The present invention controls the thickness of the solute coating by controlling the clamping pressure of the roller on the metal wire, and controls the length of the solute coating by controlling the contact time between the roller and the metal wire, so as to accurately control the total amount of solute elements coated on the surface of the metal wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the high-throughput additive manufacturing device of the present invention.

[0025] In the figure: 1, metal wire; 2, solute coating; 3, wire feeding mechanism; 4, printing module; 5, precoating assembly; 51, box body; 52, mixing mechanism; 53, grouting head; 54, roller; 55, drying oven. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] As Figure 1 shown, a high-throughput additive manufacturing device for regulating alloy composition by precoating solute on a wire of the present invention includes a wire feeding mechanism 3, a printing module 4 and a precoating assembly 5.

[0028] Among them, the wire feeding mechanism 3 stores the wire and pulls out the metal wire 1 therefrom. The wire feeding mechanism 3 includes a wire winding mechanism on which the metal wire is wound, and a wire pretreatment structure. After the metal wire 1 is pulled out, it first passes through the wire pretreatment structure for pretreatment to remove stains and oxide layers on the surface of the metal wire 1.

[0029] The printing module 4 uses the metal wire 1 for additive manufacturing. The printing module 4 is the main equipment for performing the additive manufacturing process. Usually, the metal wire 1 is introduced into the wire feeding gun head of the equipment, and the wire feeding gun head feeds the metal wire 1 onto the printing substrate and performs three-dimensional printing after laser melting.

[0030] The precoating assembly 5 is arranged between the wire feeding mechanism 3 and the printing module 4; the metal wire 1 is drawn out from the wire feeding mechanism 3, passes through the precoating assembly 5, and then is introduced into the printing module 4. The precoating assembly 5 coats a solute coating 2 on the surface of the metal wire 1 passing through it. According to the principle of the present invention, based on the composition of the alloy product to be obtained, for example, in the case of titanium alloy where low melting point elements are prone to volatilization during high-power high-energy beam additive manufacturing and need to be compensated, the composition of the titanium alloy product includes the main titanium alloy elements and low melting point volatile elements. A solute coating 2 made of low melting point volatile elements is quantitatively coated on the surface of the metal wire 1 made of the main titanium alloy elements. By controlling the thickness and length of the solute coating 2, the total amount of low melting point volatile elements coated on the surface of the metal wire 1 can be accurately regulated, and then the high-throughput dynamic regulation of the solute content during the additive manufacturing process can be realized to obtain an alloy product with the expected composition.

[0031] In Figure 1 In a preferred embodiment shown, the precoating assembly 5 includes a box body 51, a mixing mechanism 52, a grouting head 53, a roller 54, and a drying oven 55.

[0032] Among them, the metal wire 1 passes through the box body 51. The box body 51 is a closed space, and the metal wire 1 is introduced from one end and led out from the other end.

[0033] The mixing mechanism 52 is arranged outside the box body 51 and stores solute slurry. The mixing mechanism 52 is connected to the grouting head 53 and conveys the solute slurry to the grouting head 53.

[0034] The grouting head 53 is arranged in the box body 51 and is located directly above the metal wire 1. The grouting head 53 is aligned with the roller 54 and conveys the solute slurry. The grouting head 53 can convey the solute slurry by means of dropping or perfusion according to the total amount of solute slurry added.

[0035] At least two rollers 54 are arranged in the box body 51 and are symmetrically arranged up and down to clamp the metal wire 1. The rollers 54 roll on the metal wire 1 and coat the solute slurry on the surface of the metal wire 1. After the surfaces of the two rollers 54 are injected with the solute slurry, the two rollers 54 roll on the metal wire 1 with the solute slurry and coat the solute slurry attached to their wheel surfaces on the surface of the metal wire 1. In order to ensure that the solute slurry does not directly drip from the surface of the roller 54, on the one hand, the viscosity of the solute slurry needs to be controlled, and on the other hand, the wheel surface of the roller 54 is also made of a material with strong adhesion.

[0036] The drying oven 55 is arranged between the box body 51 and the printing module 4. The drying oven 55 is directly connected to one end of the box body 1 close to the printing module 4. Therefore, the metal wire material directly enters the drying oven 55 from the box body 51, avoiding contact with the external environment and causing pollution or damage. The drying oven 55 dries the solute slurry coated on the surface of the metal wire material 1, so that the surface of the metal wire material 1 is solidified to form a solute coating 2. The drying process is degreasing, that is, removing the binder in the solute slurry, so that the required solute elements are coated on the surface of the metal wire material 1.

[0037] In Figure 1 In a preferred embodiment shown, the alloy composition includes a main material element and a solute element. The content of the solute element is calculated according to the alloy target composition and is coated as a raw material for the solute coating 2. The metal wire material 1 is made of the main material element, and the solute coating 2 is made of the solute element, that is, the compensation element required to meet the target composition after additive manufacturing. For example, the target material composition is Fe 99.4 Ni 0.6 (wt.%). Its mass is 1 kg. According to the molar ratio conversion, it can be known that the mass of the main material element Fe required is 0.994 kg, and the mass of the solute element Ni required is 0.006 kg. It should be noted that the implementation mode of the present invention does not actually limit the content of the solute element. As a solute, the solute element can actually have a very high proportion. The main purpose of the present invention is for metal wire materials 1 with original compositions that are usually fixed and mature grades. When they are applied to alloy preparation, some uncommon component elements need to be added, and the added component elements can be of any type or any ratio. At this time, a solute coating 2 made of the component element can be coated on the surface of the metal wire material 1 according to the demand, so that there is no need to customize the metal wire material 1 made of the component element separately, thereby greatly reducing the cost and improving the efficiency.

[0038] In Figure 1In a preferred embodiment shown, the components of the solute slurry include, by mass percentage, 70% to 90% of solute element powder and 10% to 30% of binder. The content of the binder is adjusted according to the type of solute element and the required viscosity of the solute slurry. At the same time, the ratio also needs to be regulated according to the coating thickness. Generally speaking, if the proportion of the binder exceeds 30%, the solute slurry is very dilute and has poor viscosity, which will affect the adhesion effect of the solute slurry on the roller 54 and the wire 1, and further affect the uniformity of the solute coating 2 after curing. If the proportion of the binder is less than 10%, it will cause the solute slurry to have too high viscosity, which is not conducive to its coating on the surface of the wire 1, and will also form lumps on the surface of the wire 1 or the surface of the roller 54, affecting subsequent use. The solute element powder and the binder are put into the mixing mechanism 52 and mixed to form the solute slurry. The drying oven 55 dries the solute slurry and removes the binder. The purpose of drying is to remove the binder in the solute slurry. The binder is required not to react with the raw materials and has easy removability. The binder can be paraffin wax.

[0039] In Figure 1 In a preferred embodiment shown, the precoating assembly 5 includes at least two pairs of rollers 54, two grouting heads 53 and two mixing mechanisms 52. Each group of rollers 54, grouting heads 53 and mixing mechanisms 52 are arranged at intervals, and different combinations of solute slurries are stored in each mixing mechanism 52. The surface of the wire 1 forms solute coatings 2 of several different solute elements by intermittently coating different combinations of solute slurries. Designing two independent precoating assemblies 5 is to avoid mutual influence when different solute slurries are coated.

[0040] In Figure 1 In a preferred embodiment shown, in an ideal state, the calculation formula for the total required mass m of the solute slurry is m = πρL(2rT + T 2), where T represents the thickness of the solute coating 2, L represents the length of the solute coating 2, r represents the wire radius of the wire material 1, and ρ represents the density of the solute slurry; however, in actual situations, the total amount of solute slurry injected by the injection head 53 will be much greater than this ideal demand. The reason is that the solute slurry injected cannot all be coated on the surface of the wire material 1 and there will be significant losses. But this will create another problem, that is, it is impossible to accurately control the total amount of the solute coating 2 coated on the surface of the wire material 1. Therefore, it is necessary to control its coating total amount; the means adopted in the present invention is to set the roller 54 to move relative to the wire material 1 in the vertical direction along the axial direction of the wire material 1 and disengage from the wire material 1 or increase the clamping force on the wire material 1; by adjusting the clamping force of the two rollers 54 on the wire material 1 to regulate the thickness of the solute coating 2, and by adjusting the contact time between the roller 54 and the wire material 1 to regulate the coating length of the solute coating 2 on the wire material 1, so as to accurately control the length and thickness of the solute coating 2, and thus accurately control the solute coating 2, that is, the total coating amount of the solute element.

[0041] For example, the target alloy Fe 64 Ni 36 The required product quality is 100 g, including 64 g of iron element and 36 g of nickel element. The wire material 1 is an iron wire with a wire radius of 1 mm; the thickness of the solute coating 2 is 50 μm and the length of the solute coating is 6 m. The total mass of the actually prepared solute slurry is 100 g, in which the mass ratio of nickel to the binder is 9:1, and the density of nickel powder is 8900 kg / m 3 , assuming the density of the binder is 1000 kg / m 3 , it can be calculated that the density ρ of the slurry is 4975 kg / m 3 , and further calculated that the total ideal demand of the solute slurry is 9.62 g.

[0042] In Figure 1 In a preferred embodiment shown, in order to achieve the purpose of regulating the thickness of the solute coating 2 by adjusting the clamping force of the two rollers 54 on the wire material 1, the calculation formula for the clamping force F (unit: Newton, N) of the roller 54 on the wire material 1 is

[0043] F = [ηω(T + R)w / T]·k,

[0044] where η represents the viscosity of the solute slurry (unit: Pascal·second, Pa·s), ω represents the angular velocity of the roller 54 (unit: radian per second, rad / s), w represents the effective contact width between the roller 54 and the wire material 1 (unit: meter, m), T represents the thickness of the solute coating 2 (unit: meter, m), R represents the radius of the roller 54, and k is a correction coefficient, usually taking 1 - 2, which needs to be calibrated through experiments. For example, to prepare the target alloy Fe 64 Ni36 When the wire feeding speed \(v = 0.1m / s\) and the radius \(R\) of the roller 54 is \(0.025m\), the angular velocity \(\omega\) of the roller 54 can be obtained according to the calculation formula \(\omega=v / R\), and \(\omega = 4rad / s\); assuming that the viscosity of the solute slurry is \(1Pa\cdot s\), the effective contact width \(w\) between the roller 54 and the wire 1 is \(0.01m\), and the correction parameter \(k\) is set to \(1.5\), the clamping force \(F\) of the roller 54 on the wire 1 can be calculated as \(F = 30.06N\).

[0045] In Figure 1 a preferred embodiment shown, the calculation formula for the contact time \(t\) (unit: second, s) between the roller 54 and the wire 1 is

[0046] t = L contact / [π(T + R)n],

[0047] wherein, L contact represents the contact arc length (unit: meter, m) between the roller 54 and the wire 1, T represents the thickness of the solute coating 2 (unit: meter, m), R represents the radius of the roller 54 (unit: meter, m), and n represents the rotational speed of the roller 54 (unit: revolutions per second, rpm). Through the angular velocity of the roller 54, the rotational speed \(n\) of the roller 54 can be converted to approximately \(n≈0.64rpm\); the contact arc length between the roller 54 and the wire 1 is related to the clamping force of the roller 54. Assuming \(L contact ≈1.58mm, and then the contact time \(t\) between the roller 54 and the wire 1 can be calculated as \(t = 0.03s\).

[0048] In Figure 1 a preferred embodiment shown, the wire 1 is made of an alloy material, more precisely, a workable wire close to the target composition of the alloy. Therefore, the wire 1 can contain multiple main component elements, such as wire materials of titanium alloy, aluminum alloy, stainless steel, and superalloy, etc.; the solute coating 2 is made of a single element or an intermediate alloy containing solute elements. The intermediate alloy is a special alloy with a metal as the matrix and one or several simple substances added to it to improve the alloy properties, thus helping to accurately control the total coating amount of the solute coating 2.

[0049] As Figure 1 shown, a high-throughput additive manufacturing method for regulating alloy composition by pre-coating solute on a wire of the present invention uses the high-throughput additive manufacturing device for regulating alloy composition by pre-coating solute on a wire in any of the above embodiments, and includes the following steps:

[0050] Step 1, select the wire 1 according to the material composition of the target product and design the composition of the solute coating 2, and put the solute element powder and the binder into the mixing mechanism 52 to mix and make a coating slurry.

[0051] Step 2: Adjust the clamping force of the roller 54 on the wire 1 and the contact time between the roller 54 and the wire 1 according to the thickness and length of the solute coating 2 required by the design, guide the wire 1 through the box body 51, coat the solute slurry on the surface of the wire 1, and degrease, dry and cure the solute slurry through the drying oven 55 to form the solute coating 2 on the surface of the wire 1.

[0052] Step 3: Detect the indexes of the composition, thickness, length and uniformity of the solute coating 2. After passing the inspection, introduce the wire 1 into the printing module 4 to participate in additive manufacturing.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-throughput additive manufacturing device for controlling alloy composition by pre-coating solute on wire, characterized in that: include: A wire feeding mechanism (3) for storing the wire and drawing the metal wire (1) therefrom; A printing module (4) for performing additive manufacturing using the metal wire material (1); A pre-coating component (5) is arranged between the wire feeding mechanism (3) and the printing module (4); The metal wire (1) is pulled out from a wire feeding mechanism (3) and introduced into a printing module (4) after passing through a pre-coating component (5), and the pre-coating component (5) applies a solute coating (2) on the surface of the metal wire (1) passing through it.

2. A high-throughput additive manufacturing device for controlling alloy composition by pre-coating solute on wire according to claim 1, characterized in that: The pre-coating assembly (5) comprises: a box body (51) through which the metal wire material (1) passes; A mixing mechanism (52) is arranged outside the box (51) and stores a solute slurry; A grouting head (53) is arranged in the box (51) and is located directly above the metal wire (1); At least two rollers (54) are arranged in the box (51) and are symmetrically arranged up and down to clamp the metal wire (1); A drying box (55), arranged between the box body (51) and the printing module (4); Wherein, the mixing mechanism (52) is connected to the grouting head (53) and transports the solute slurry to the grouting head (53); The grouting head (53) is aligned with the roller (54) and delivers the solute slurry; The roller (54) rolls on the metal wire (1) and applies the solute slurry on the surface of the metal wire (1); The drying box (55) dries the solute slurry coated on the surface of the metal wire (1), so that the surface of the metal wire (1) is solidified to form a solute coating (2).

3. A high-throughput additive manufacturing device for controlling alloy composition by pre-coating solute on wire according to claim 2, characterized in that: The alloy composition includes main material elements and solute elements; The metal wire (1) is made of a main material element, and the solute coating (2) is made of a solute element.

4. A high-throughput additive manufacturing device for controlling alloy composition by pre-coating solute on wire according to claim 3, characterized in that: The components of the solute slurry include, by mass percentage, 70% to 90% of solute element powder and 10% to 30% of a binder. The solute element powder and the binder are put into a mixing mechanism (52) and mixed to form a solute slurry. The drying box (55) dries the solute slurry and removes the binder.

5. The high-throughput additive manufacturing device for controlling alloy composition by pre-coating solute on wire according to claim 3, characterized in that: The pre-coating assembly (5) comprises at least two pairs of rollers (54), two grouting heads (53) and two mixing mechanisms (52), each group of the rollers (54), the grouting heads (53) and the mixing mechanisms (52) being arranged at intervals, and each of the mixing mechanisms (52) stores solute slurries of different combinations; The surface of the metal wire (1) is coated with solute slurries of different combinations at intervals to form a plurality of sections of solute coatings (2) with different solute elements.

6. A high-throughput additive manufacturing device for controlling alloy composition by pre-coating solute on wire according to claim 2, characterized in that: The roller (54) moves relative to the metal wire (1) in a direction perpendicular to the axial direction of the metal wire (1) and breaks away from contact with the metal wire (1) or increases the clamping force on the metal wire (1); The thickness of the solute coating (2) is regulated by adjusting the clamping force of the two rollers (54) on the metal wire (1), and the coating length of the solute coating (2) on the metal wire (1) is regulated by adjusting the contact time between the rollers (54) and the metal wire (1).

7. A high-throughput additive manufacturing device for controlling alloy composition by pre-coating wire with solute according to claim 6, characterized in that: The calculation formula of the clamping force F of the roller (54) on the metal wire (1) is: F=[ηω(T+R)w / T]·k, Wherein, η represents the viscosity of the solute slurry, v represents the rotation speed of the roller (54), w represents the effective contact width between the roller (54) and the metal wire (1), T represents the thickness of the solute coating (2), and k is a correction coefficient, which is usually 1 to 2.

8. A high-throughput additive manufacturing device for controlling alloy composition by pre-coating wire with solute according to claim 7, characterized in that: The calculation formula for the contact time t between the roller (54) and the metal wire (1) is: t=L contact / [π(T+R)n], Among them, L contact represents the contact arc length between the roller (54) and the metal wire (1), D represents the diameter of the roller (54), T represents the thickness of the solute coating (2), and v represents the rotation speed of the roller (54).

9. The high-throughput additive manufacturing device for controlling alloy composition by pre-coating solute on wire according to claim 1, characterized in that: The metal wire (1) is made of an alloy material, and the solute coating (2) is made of a single element or an intermediate alloy containing a solute element.

10. A high-throughput additive manufacturing method for controlling alloy composition by pre-coating solute on wire, characterized in that: A high-throughput additive manufacturing device for controlling alloy composition by pre-coating a wire with solute as described in any one of claims 2 to 8 comprises the following steps: Step 1: Selecting a metal wire material (1) and designing the composition of a solute coating (2) according to the material composition of the target product, and adding solute element powder and a binder into a mixing mechanism (52) to mix and form a coating slurry; Step 2: adjusting the clamping force of the roller (54) on the metal wire (1) and the contact time between the roller (54) and the metal wire (1) according to the thickness and length of the solute coating (2) required by the design, guiding the metal wire (1) through the box (51) and coating the solute slurry on the surface of the metal wire (1), degreasing, drying and curing the solute slurry through the drying box (55) and forming the solute coating (2) on the surface of the metal wire (1); Step three, the solute coating (2) is tested for composition, thickness, length and uniformity, and if qualified, the metal wire (1) is introduced into a printing module (4) to participate in additive manufacturing.

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