Powder feeding type additive forming method for bulk amorphous alloy

Abstract

The invention provides a bulk amorphous alloy powder feeding type additive forming method which comprises the following steps: S1, pre-cooling a forming substrate, and preserving heat for 20 minutes; s2, the humidity in a forming cavity of the laser additive manufacturing device is adjusted in the pre-cooling process, and a low-humidity environment around the substrate is constructed; s3, inert gas is introduced into the forming area, and an atmosphere environment is constructed; s4, single-layer powder feeding type additive forming is carried out on the forming substrate; s5, in a low-humidity inert gas environment, a stone grinding wheel is used for conducting single-time in-situ leveling machining on the single-layer deposition surface of the deposition area, and high-pressure nitrogen is adopted for conducting cleaning and chip removal on the surface in the leveling process and after the leveling process; s6, the flattened surface is pre-cooled, and a next layer is deposited in a low-humidity inert atmosphere environment; and S7, the steps from S1 to S6 are repeated until the bulk amorphous alloy of the target size is obtained. According to the bulk amorphous alloy powder feeding type additive forming method, high-flexibility manufacturing of amorphous alloy parts is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing of metal components, and in particular to a bulk amorphous alloy powder feeding type additive molding method. Background Art

[0002] Amorphous alloys are metallic materials with a unique atomic structure, characterized by a long-range disordered arrangement of atoms. These materials are produced using modern metallurgical techniques, such as rapid solidification. Due to their exceptional properties, such as high strength, high hardness, excellent corrosion resistance, good soft magnetic properties, high elasticity, wear resistance, low processing temperatures, and excellent formability, amorphous alloys offer broad application prospects in a variety of fields, including electronics and power, aerospace and defense, medical devices, consumer electronics, machinery manufacturing, and new energy. In the electronics and power sectors, the low loss characteristics of amorphous alloys make them suitable for transformer cores, inductors, and magnetic shielding materials, significantly reducing energy consumption. For example, iron-based amorphous alloy strips are widely used in distribution transformers, offering low iron loss and significant energy savings. In the aerospace and defense industry, their high strength, corrosion resistance, and lightweight properties make them suitable for aircraft structural components and high-performance equipment. Furthermore, amorphous alloys show potential in cutting-edge technologies such as sensors, microelectromechanical systems (MEMS), and aircraft engine turbine blades.

[0003] The high strength and hardness of amorphous alloys at room temperature make it difficult to machine them by conventional means. Although complex structural block amorphous alloy components can be formed by laser additive technology, the first deposited part solidifies first and then cools naturally in the air, which creates a horizontal temperature gradient inside the molten pool. This causes the heat of the molten pool to flow to the surroundings while also flowing from the melting front of the molten pool to the solidification front. This uneven heat flow will reduce the soft point and free volume of the formed amorphous alloy, resulting in extremely poor plasticity of the formed amorphous alloy components, which are brittle after stamping and difficult to form laminations, limiting the engineering application of printed components. Summary of the Invention

[0004] The embodiment of the present invention provides a bulk amorphous alloy powder feeding type additive molding method to solve the problem of brittleness of amorphous alloys in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a bulk amorphous alloy powder feeding additive molding method, which uses a laser additive manufacturing device to mold the amorphous alloy, comprising the following steps:

[0006] S1. Pre-cool the formed substrate and keep it warm for 20 minutes;

[0007] S2. During the pre-cooling process, the humidity in the molding chamber of the laser additive manufacturing device is adjusted to create a low-humidity environment around the substrate;

[0008] S3. Pass inert gas into the molding area to create an atmosphere;

[0009] S4, performing single-layer powder feeding additive manufacturing on the molding substrate;

[0010] S5. In a low-humidity inert gas environment, use a stone grinding wheel to perform a single in-situ leveling process on the single-layer deposited surface of the deposition area. During and after the leveling process, high-pressure nitrogen is used to clean and remove chips from the surface.

[0011] S6. Pre-cooling the flattened surface and depositing the next layer in a low-humidity inert atmosphere;

[0012] S7. Repeat steps S1 to S6 until a bulk amorphous alloy of target size is obtained.

[0013] Furthermore, in S2, the humidity in the molding cavity is adjusted to 15% to 50%;

[0014] In S3, 99% high purity argon gas is passed through the molding area.

[0015] In some embodiments, the substrate in S1 is Cu 50 Zr 50 Alloy substrate, and Zr is obtained in S7 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 of bulk amorphous alloys.

[0016] Furthermore, in S1, Cu 50 Zr 50 The size of the alloy substrate is 200*200mm. 50 Zr 50 The alloy substrate is pre-cooled to -100°C;

[0017] In S4, the forming laser power is 400W, the laser wavelength is 1064nm, the powder spreading speed is 20mm / s, the spot diameter is 0.6mm, the powder / argon volume ratio is 1:10, and the thickness of the amorphous deposited layer is about 2mm;

[0018] In S5, a 1000# resin-bonded diamond grinding wheel was used to flatten the deposition area in a nitrogen atmosphere, with a grinding wheel linear speed of 30 m / s, a grinding wheel cutting depth of 0.1 mm, and a feed speed of 0.5 m / min.

[0019] In S6, the flattened surface is pre-cooled to -100°C;

[0020] In S7, Zr 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 The size of the bulk amorphous alloy is 80*60*60mm

[0021] In some embodiments, the substrate in S1 is Cu 50 Zr 42 Al8 alloy substrate, and Cu obtained in S7 50 Zr 42 Bulk amorphous alloy of Al8.

[0022] Furthermore, in S1, Cu 50 Zr 42 The size of Al8 alloy substrate is 200*200mm. 50 Zr 42 Al8 alloy substrate is pre-cooled to -120℃;

[0023] In S4, the forming laser power is 400W, the laser wavelength is 1064nm, the powder spreading speed is 30mm / s, the spot diameter is 0.6mm, the powder / argon volume ratio is 1.5:10, and the thickness of the amorphous deposited layer is about 2mm;

[0024] In S5, a 1000# resin-based diamond grinding wheel was used to flatten the deposition area in a nitrogen atmosphere. The grinding wheel linear speed was 35 m / s, the grinding wheel cutting depth was 0.1 mm, and the feed speed was 0.5 m / min. High-pressure nitrogen was used to clean and remove chips during and after the flattening process.

[0025] In S6, the flattened surface is pre-cooled to -120°C;

[0026] In S7, Cu 50 Zr 42 The size of the Al8 bulk amorphous alloy is 100*50*50mm.

[0027] In some embodiments, the substrate in S1 is a Ti6Al4V alloy substrate, and the Ti 66.7 Ni 20 Cu 13.3 of bulk amorphous alloys.

[0028] Furthermore, in S1, the size of the Ti6Al4V alloy substrate is 300*300 mm, and the Ti6Al4V alloy substrate is pre-cooled to -120°C;

[0029] In S4, the forming laser power is 400W, the laser wavelength is 1064nm, the powder spreading speed is 15mm / s, the spot diameter is 0.6mm, the powder / argon volume ratio is 1:10, and the thickness of the amorphous deposited layer is about 2mm;

[0030] In S5, a 1000# resin-bonded diamond grinding wheel was used to flatten the deposition area in a nitrogen atmosphere, with a grinding wheel linear speed of 40 m / s, a grinding wheel cutting depth of 0.1 mm, and a feed speed of 12 m / min.

[0031] In S6, the flattened surface is pre-cooled to -120°C;

[0032] In S7, Ti 66.7 Ni 20 Cu 13.3 The size of the bulk amorphous alloy is 80*80*80mm.

[0033] The beneficial effects of the present invention are:

[0034] The bulk amorphous alloy powder feeding additive molding method provided by the present invention is based on the existing system amorphous alloy powder and powder feeding laser additive equipment. It aims to achieve its amorphous molding by controlling the substrate temperature during the powder feeding additive molding process, so as to solve the limitations of amorphous alloy preparation in the existing technology and realize high-flexibility manufacturing of amorphous alloy parts in the existing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Flowchart of the powder-feeding additive manufacturing method for bulk amorphous alloys. DETAILED DESCRIPTION

[0036] The following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0037] Example 1:

[0038] An embodiment of the present invention provides a bulk amorphous alloy powder feeding additive molding method, which uses a laser additive manufacturing device to mold the amorphous alloy, specifically comprising the following steps:

[0039] S1. Pre-cool the formed substrate to a temperature of -50 to -150°C.

[0040] S2. During the pre-cooling process, adjust the ambient humidity to 15% to 65%;

[0041] S3. Pass 99% high-purity inert gas into the molding area to create an atmosphere environment. The inert gas can be nitrogen, argon, helium, etc.

[0042] S4, performing single-layer powder feeding additive molding on the molding substrate, with the molding laser power ranging from 400 to 1000W and the laser deposition head moving speed of 1 to 50 mm / s;

[0043] S5. In-situ leveling of the monolayer deposited surface is performed in a low-humidity inert gas environment (i.e., immediate leveling of the surface of the monolayer material just deposited). Leveling is performed using an 80-2000# grinding wheel with a grinding speed of 10-50 m / s, a grinding depth of 0.01-0.5 mm, and a feed rate of 1-30 m / min. A single grinding process is performed, and high-pressure nitrogen is used to clean and remove chips from the surface during and after the leveling process.

[0044] S6. Pre-cool the flattened surface and deposit the next layer in a low-humidity inert atmosphere at a pre-cooling temperature of -50 to -150°C.

[0045] S7. Repeat steps S1 to S6 until the target size is obtained.

[0046] Example 2:

[0047] The embodiment of the present invention provides a bulk Zr 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 Powder feeding additive manufacturing method is used to convert 200*200mm Cu 50 Zr 50 80*60*60mm Zr is formed on the alloy substrate 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 The bulk amorphous alloy specifically comprises the following steps:

[0048] S1. First, place 200*200mm Cu 50 Zr 50 Alloy substrate is pre-cooled to -100℃ (select Zr 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 Similar Cu 50 Zr 50 The material serves as a substrate to ensure heat conduction between the substrate and the molten material; and when the substrate and the molten material have similar chemical compositions, chemical bonds are more likely to form or interact between them. The formation of such chemical bonds can enhance the adhesion between the molten material and the substrate. Good adhesion can prevent the molten material from falling off the substrate during subsequent processing or use) and keep warm for 20 minutes;

[0049] S2. Create a low humidity environment around the substrate and adjust the ambient humidity to 15% to 50% during the pre-cooling process;

[0050] S3. Pass 99% high-purity argon gas into the molding area to create an atmosphere environment;

[0051] S4, perform single-layer powder feeding additive molding (molding material is Zr 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 ), the forming laser power is 400W, the laser wavelength is 1064nm, the powder spreading speed is 20mm / s, the spot diameter is 0.6mm, the powder / argon volume ratio is 1:10, and the thickness of the amorphous deposited layer is about 2mm;

[0052] S5. In-situ flattening of the monolayer deposited surface is performed in a low-humidity inert gas environment. A 1000# resin-based diamond grinding wheel is used to flatten the deposited area in a nitrogen atmosphere. The grinding wheel linear speed is 30 m / s, the grinding wheel cutting depth is 0.1 mm, and the feed rate is 0.5 m / min. A single grinding process is performed. High-pressure nitrogen is used to clean and remove chips during and after the flattening process.

[0053] S6. Pre-cool the flattened surface to -100°C and deposit the next layer in a low-humidity inert atmosphere;

[0054] S7, repeat steps S1 to S6 until a Zr with a size of 80*60*60mm is obtained. 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 The bulk amorphous alloy is cut from the substrate after the bulk amorphous alloy is formed, and the bulk amorphous alloy and the substrate are only temporarily combined during the manufacturing process.

[0055] Example 3:

[0056] The embodiment of the present invention provides a bulk Cu 50 Zr 42 Al8 powder feeding additive molding method is used to convert 200*200mm Cu 50 Zr 42 100*50*50mm Cu is formed on Al8 alloy substrate 50 Zr 42 The bulk amorphous alloy of Al8 specifically includes the following steps:

[0057] S1. First, place 200*200mm Cu 50 Zr42 Al8 alloy substrate is pre-cooled to -120℃ (select Cu 50 Zr 42 Al8 is used as the substrate to ensure thermal conductivity between the substrate and the molten material; and when the substrate and the molten material have similar chemical compositions, chemical bonds are more likely to form or interact between them. The formation of such chemical bonds can enhance the adhesion between the molten material and the substrate. Good adhesion can prevent the molten material from falling off the substrate during subsequent processing or use) and keep warm for 20 minutes;

[0058] S2. Create a low humidity environment around the substrate and adjust the ambient humidity to 15% to 50% during the pre-cooling process;

[0059] S3. Pass 99% high-purity argon gas into the molding area to create an atmosphere environment;

[0060] S4, perform single-layer powder feeding additive molding (molding material is Cu 50 Zr 42 Al8), the forming laser power is 400W, the laser wavelength is 1064nm, the powder spreading speed is 30mm / s, the spot diameter is 0.6mm, the powder / argon volume ratio is 1.5:10, and the thickness of the amorphous deposited layer is about 2mm;

[0061] S5. In-situ flattening of the monolayer deposited surface is performed in a low-humidity inert gas environment. A 1000# resin-bonded diamond grinding wheel is used to flatten the deposited area in a nitrogen atmosphere. The grinding wheel linear speed is 35 m / s, the grinding wheel cutting depth is 0.1 mm, and the feed rate is 0.5 m / min. A single grinding process is performed. High-pressure nitrogen is used to clean and remove chips during and after the flattening process.

[0062] S6. Pre-cool the flattened surface to -120°C and deposit the next layer in a low-humidity inert atmosphere;

[0063] S7, repeat steps S1 to S6 until a Cu sheet with a size of 100*50*50mm is obtained. 50 Zr 42 Al8 bulk amorphous alloy (the bulk amorphous alloy is cut from the substrate after forming, and the bulk amorphous alloy and the alloy are only temporarily combined during the manufacturing process).

[0064] Example 4:

[0065] The embodiment of the present invention provides a block Ti 66.7 Ni 20 Cu 13.3 The powder feeding additive molding method is used to form a 80*80*80mm Ti on a 300*300mm Ti6Al4V titanium alloy substrate. 66.7Ni 20 Cu 13.3 The bulk amorphous alloy specifically comprises the following steps:

[0066] S1. First, pre-cool the 300*300mm Ti6Al4V titanium alloy substrate to -120℃ (select the same as Ti 66.7 Ni 20 Cu 13.3 A similar Ti6Al4V material is used as the substrate to ensure thermal conductivity between the substrate and the molten material; and when the substrate and the molten material have similar chemical compositions, chemical bonds are more likely to form or interact between them. The formation of such chemical bonds can enhance the adhesion between the molten material and the substrate. Good adhesion can prevent the molten material from falling off the substrate during subsequent processing or use) and then keep warm for 20 minutes;

[0067] S2. Create a low humidity environment around the substrate and adjust the ambient humidity to 15% to 50% during the pre-cooling process;

[0068] S3. Pass 99% high-purity argon gas into the molding area to create an atmosphere environment;

[0069] S4, perform single-layer powder feeding additive molding (molding material is Ti 66.7 Ni 20 Cu 13.3 ), the forming laser power is 400W, the laser wavelength is 1064nm, the powder spreading speed is 15mm / s, the spot diameter is 0.6mm, the powder / argon volume ratio is 1:10, and the thickness of the amorphous deposited layer is about 2mm;

[0070] S5. In-situ flattening of the monolayer deposited surface is performed in a low-humidity inert gas environment. A 1000# resin-bonded diamond grinding wheel is used to flatten the deposited area in a nitrogen atmosphere. The grinding wheel linear speed is 40 m / s, the grinding wheel cutting depth is 0.1 mm, and the feed speed is 12 m / min. A single grinding process is performed. High-pressure nitrogen is used to clean and remove chips during and after the flattening process.

[0071] S6. Pre-cool the flattened surface to -120°C and deposit the next layer in a low-humidity inert atmosphere;

[0072] S7, repeat steps S1 to S6 until a Ti with a size of 80*80*80mm is obtained. 66.7 Ni 20 Cu 13.3 The bulk amorphous alloy is cut from the substrate after the bulk amorphous alloy is formed, and the bulk amorphous alloy and the substrate are only temporarily combined during the manufacturing process.

[0073] This bulk amorphous alloy powder feeding additive molding method is based on the existing system amorphous alloy powder and powder feeding laser additive equipment. It aims to achieve its amorphous molding by controlling the substrate temperature during the powder feeding additive molding process, so as to solve the limitations of amorphous alloy preparation in the existing technology and realize highly flexible manufacturing of amorphous alloy parts in the existing system.

[0074] The above-described embodiments merely illustrate the implementation methods of the present invention and should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A bulk amorphous alloy powder feeding additive molding method, wherein the amorphous alloy is molded by a laser additive manufacturing device, characterized in that: The steps include: S1. Pre-cool the formed substrate and keep it warm for 20 minutes; S2. During the pre-cooling process, the humidity in the molding chamber of the laser additive manufacturing device is adjusted to create a low-humidity environment around the substrate; S3. Pass inert gas into the molding area to create an atmosphere environment; S4, performing single-layer powder feeding additive manufacturing on the molding substrate; S5. In a low-humidity inert gas environment, use a stone grinding wheel to perform a single in-situ leveling process on the single-layer deposited surface of the deposition area. During and after the leveling process, high-pressure nitrogen is used to clean and remove chips from the surface. S6. Pre-cooling the flattened surface and depositing the next layer in a low-humidity inert atmosphere; S7. Repeat steps S1 to S6 until a bulk amorphous alloy of target size is obtained.

2. The bulk amorphous alloy powder feeding additive molding method according to claim 1, characterized in that: In S2, the humidity in the molding cavity is adjusted to 15% to 50%; In S3, 99% high-purity argon gas is passed through the molding area.

3. The bulk amorphous alloy powder feeding additive molding method according to claim 1, characterized in that: The substrate in S1 is Cu 50 Zr 50 Alloy substrate, and Zr is obtained in S7 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 of bulk amorphous alloys.

4. The bulk amorphous alloy powder feeding additive molding method according to claim 3, characterized in that: In S1, Cu 50 Zr 50 The size of the alloy substrate is 200*200mm. 50 Zr 50 The alloy substrate is pre-cooled to -100°C; In S4, the forming laser power is 400W, the laser wavelength is 1064nm, the powder spreading speed is 20mm / s, the spot diameter is 0.6mm, the powder / argon volume ratio is 1:10, and the thickness of the amorphous deposited layer is about 2mm; In S5, a 1000# resin-bonded diamond grinding wheel was used to flatten the deposition area in a nitrogen atmosphere, with a grinding wheel linear speed of 30 m / s, a grinding wheel cutting depth of 0.1 mm, and a feed speed of 0.5 m / min. In S6, the flattened surface is pre-cooled to -100°C; In S7, Zr 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 The size of the bulk amorphous alloy is 80*60*60mm.

5. The bulk amorphous alloy powder feeding additive molding method according to claim 1, characterized in that: The substrate in S1 is Cu 50 Zr 42 Al8 alloy substrate, and Cu obtained in S7 50 Zr 42 Bulk amorphous alloy of Al8.

6. The bulk amorphous alloy powder feeding additive molding method according to claim 5, characterized in that: In S1, Cu 50 Zr 42 The size of Al8 alloy substrate is 200*200mm. 50 Zr 42 Al8 alloy substrate is pre-cooled to -120℃; In S4, the forming laser power is 400W, the laser wavelength is 1064nm, the powder spreading speed is 30mm / s, the spot diameter is 0.6mm, the powder / argon volume ratio is 1.5:10, and the thickness of the amorphous deposited layer is about 2mm; In S5, a 1000# resin-based diamond grinding wheel was used to flatten the deposition area in a nitrogen atmosphere. The grinding wheel linear speed was 35 m / s, the grinding wheel cutting depth was 0.1 mm, and the feed speed was 0.5 m / min. High-pressure nitrogen was used to clean and remove chips during and after the flattening process. In S6, the flattened surface is pre-cooled to -120°C; In S7, Cu 50 Zr 42 The size of the Al8 bulk amorphous alloy is 100*50*50mm.

7. The bulk amorphous alloy powder feeding additive molding method according to claim 1, characterized in that: The substrate in S1 is a Ti6Al4V alloy substrate, and the Ti 66.7 Ni 20 Cu 13.3 of bulk amorphous alloys.

8. The bulk amorphous alloy powder feeding additive molding method according to claim 7, characterized in that: In S1, the size of the Ti6Al4V alloy substrate is 300*300 mm, and the Ti6Al4V alloy substrate is pre-cooled to -120°C; In S4, the forming laser power is 400W, the laser wavelength is 1064nm, the powder spreading speed is 15mm / s, the spot diameter is 0.6mm, the powder / argon volume ratio is 1:10, and the thickness of the amorphous deposited layer is about 2mm; In S5, a 1000# resin-bonded diamond grinding wheel was used to flatten the deposition area in a nitrogen atmosphere, with a grinding wheel linear speed of 40 m / s, a grinding wheel cutting depth of 0.1 mm, and a feed speed of 12 m / min. In S6, the flattened surface is pre-cooled to -120°C; In S7, Ti 66.7 Ni 20 Cu 13.3 The size of the bulk amorphous alloy is 80*80*80mm.

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