A method for improving high temperature alloy defects by optimizing heat treatment scheme

Abstract

The present invention relates to the field of laser selective melting additive manufacturing technology, specifically a method for improving high-temperature alloy defects by optimizing the heat treatment scheme, including selecting metal powder of the required material, and using SLM metal printing equipment to form the metal powder by laser printing to obtain a metal workpiece; the metal workpiece is subjected to vacuum annealing treatment by a heat treatment device, and then sent to a vacuum heating furnace for vacuum solid solution treatment to complete the heat treatment of the metal part. The high-temperature alloy after annealing heat treatment can eliminate internal stress, reduce deformation and cracking, and improve the grain structure of the material to make it more uniform and delicate, thereby improving the material performance, and continuously heat-treating and quenching the metal workpiece, with less heat energy consumption, high efficiency of loading and unloading of the workpiece, and improved overall heat treatment efficiency. It is suitable for high-temperature alloy thin-walled parts, and the risk of part cracking can be reduced by improving the heat treatment process of the formed parts.

Description

Technical Field

[0001] The invention relates to the field of laser selective melting additive manufacturing, and in particular to a method for improving defects of high-temperature alloys by optimizing a heat treatment scheme. Background Art

[0002] Laser selective melting technology uses fiber lasers to achieve forming, and has the advantages of high material utilization and fast forming. However, due to the rapid melting and solidification of powder during the forming process, the formed parts will have problems such as coarse grains and thermal stress accumulation. A reasonable heat treatment process is required to meet the material application standards.

[0003] Previously, the parts processing process was laser forming → vacuum solution treatment → wire cutting. The solution heat treatment system was to heat the furnace to 500℃±10℃, then continue to heat it to, and carry out argon partial pressure, continue to heat it to 1000℃±10℃ and then keep it warm, then take it out of the furnace and air cool it to room temperature. After this heat treatment, cracks visible to the naked eye appeared on the surface of the parts. Therefore, a method to improve the defects of high-temperature alloys by optimizing the heat treatment scheme was proposed. Summary of the invention

[0004] In response to the problems in the prior art, the present invention provides a method for improving defects in high-temperature alloys by optimizing the heat treatment scheme, so that the high-temperature alloy can eliminate internal stress, reduce deformation and cracking, and at the same time improve the grain structure of the material to make it more uniform and delicate, thereby improving material properties. The method is suitable for high-temperature alloy thin-walled parts, and reduces the risk of part cracking by improving the heat treatment process of the formed parts. The metal workpiece is continuously heat-treated and quenched, with low heat energy consumption and high efficiency in loading and unloading workpieces, thereby improving the overall heat treatment efficiency.

[0005] The technical solution adopted by the present invention to solve the technical problem is a method for improving the defects of high-temperature alloys by optimizing the heat treatment scheme, comprising the following steps:

[0006] Step 1: Select metal powder of the required material, and use SLM metal printing equipment to laser print the metal powder to obtain a metal workpiece;

[0007] Step 2: The metal workpiece is subjected to vacuum annealing treatment in a heat treatment device, and then sent to a vacuum heating furnace for vacuum solution treatment to complete the heat treatment of the metal workpiece;

[0008] Step 3: The heat-treated metal parts are subjected to wire cutting processing by wire cutting equipment to obtain products.

[0009] Specifically, the vacuum annealing temperatures of the metal workpiece by the heat treatment device in step 2 are: 500℃±10℃, 800℃±10℃, 60℃, respectively, and the solution treatment temperatures of the vacuum heating furnace in step 2 are: 500℃±10℃, 800℃±10℃, 1000℃±10℃, respectively.

[0010] Specifically, the heat treatment device includes a heat treatment part, a transposition assembly, a driving assembly and a feeding assembly, wherein the transposition assembly is arranged inside the heat treatment part, the driving assembly is installed on the heat treatment part, the feeding assembly is located on one side of the heat treatment part, and the driving assembly is connected to the transposition assembly and the feeding assembly;

[0011] The transposition assembly comprises a cross support plate and a storage plate. The storage plate is fixedly arranged along the bottom angle of the cross support plate. A sealing groove is arranged on the outer periphery of the cross support plate.

[0012] Specifically, the heat treatment part includes a furnace body, the cross support plate is arranged in the furnace body, the inner chamber of the furnace body is divided into a room temperature chamber, a low temperature chamber, a high temperature chamber and a cooling chamber in sequence by the cross support plate, and the inner walls of the low temperature chamber and the high temperature chamber are both installed with molybdenum heaters;

[0013] Insertion and extraction ports are provided between the room temperature cavity, the low temperature cavity, the high temperature cavity and the cooling cavity, and plug blocks for sealing are inserted into the insertion and extraction ports. A sealing protrusion corresponding to the sealing groove is provided on the side of the plug block close to the cross support plate. A C-shaped support plate is equidistantly connected to the outer periphery of the furnace body, and an oil cylinder is installed on the C-shaped support plate. The output end of the oil cylinder is installed with the plug block at the corresponding position.

[0014] Specifically, a material door for loading and unloading materials is provided on one side of the room temperature chamber;

[0015] The material door, furnace body, cross support plate and storage plate are all provided with thermal insulation cotton and thermal break bridge structure;

[0016] An argon gas delivery pipe and an exhaust pipe are respectively installed on the cooling cavity and outside the furnace body;

[0017] A vacuum pump is arranged outside the furnace body, and an air inlet end of the vacuum pump is connected to the low-temperature cavity, the high-temperature cavity and the cooling cavity respectively.

[0018] Specifically, the driving assembly includes a servo motor, a driving rod, a worm and a worm wheel. The servo motor is installed at the center of the top circle of the furnace body. The driving rod passes through the middle of the cross support plate and is fixed to the cross support plate by a key pin. The driving end of the servo motor is connected to the rotating shaft of the driving rod.

[0019] A base is provided at the bottom of the furnace body, the worm is rotatably installed at the center of the bottom of the furnace body through a bearing, the bottom of the driving rod is connected to the worm rotating shaft, a horizontal axis is laterally provided on one side of the worm, both ends of the horizontal axis are rotatably connected to the base through bearings, the worm wheel is installed on the horizontal axis, and the worm is meshed with the worm wheel.

[0020] Specifically, a transmission chain and two first sprockets are arranged at one end of the worm, the two first sprockets are respectively meshed with two ends of the transmission chain, and one of the two first sprockets is installed with the transverse axis.

[0021] Specifically, the feeding assembly includes a support frame, a connecting shaft is rotatably installed at one end of the support frame through a bearing, support chains are respectively arranged on both sides of the support frame, and second sprockets are respectively meshed at both ends of the support chain, the second sprocket at one end of the support chain is installed on the connecting shaft, and one end of the connecting shaft is installed and connected to the other of the two groups of the first sprockets;

[0022] Specifically, the vacuum annealing process comprises the following steps:

[0023] Step 1: Turn on the molybdenum heaters in the low-temperature chamber and the high-temperature chamber to preheat, open the material door, and send the printed metal workpiece to the placement plate in the room-temperature chamber. Close the material door, and use the vacuum pump to evacuate the room-temperature chamber, the low-temperature chamber, the high-temperature chamber, and the cooling chamber.

[0024] Step 2: The servo motor drives the driving rod to rotate, so that the driving rod drives the cross support plate to rotate, so that the placement plate of the cross support plate drives the metal workpiece into the low-temperature chamber, and the vacuum pump evacuates the low-temperature chamber. The molybdenum heater in the low-temperature chamber is heated to 500℃±10℃, and then kept warm for 0.5h;

[0025] Step 3: Open the material door, place the printed metal workpiece on the placement plate in the room temperature chamber, close the material door, evacuate the room temperature chamber by the vacuum pump, and drive the driving rod to rotate by the servo motor to make the metal workpiece in the low temperature chamber enter the high temperature chamber. The vacuum pump evacuates the high temperature chamber, and the molybdenum heater raises the temperature in the high temperature chamber to 800℃±10℃, and then keeps it warm for 0.5h;

[0026] Step 4: Open the material door, place the printed metal workpiece on the placement plate in the room temperature chamber, close the material door, evacuate the room temperature chamber by the vacuum pump, and drive the driving rod to rotate with the servo motor to make the metal workpiece in the high temperature chamber enter the cooling chamber. Open the argon gas delivery pipe to slowly discharge argon gas from the cooling chamber, open the exhaust pipe, and slowly discharge and recycle the excess argon gas until the temperature is cooled to below 400°C, then accelerate the delivery of argon gas to cool the temperature in the cooling chamber to 60°C;

[0027] Step 5: The servo motor drives the driving rod to rotate, so that the metal parts in the cooling chamber enter the room temperature chamber, open the material door, take out the workpiece cooled in the room temperature chamber, allow the cooled workpiece to further cool to room temperature, and put in a new printed metal workpiece, then close the material door, and use the vacuum pump to evacuate the room temperature chamber, and repeat this cycle.

[0028] Specifically, the vacuum solution treatment comprises the following steps:

[0029] Step 1: Place the metal workpiece after vacuum annealing into a vacuum heating furnace, heat the metal workpiece to 500°C ± 10°C, and then keep it warm for 0.5h;

[0030] Step 2: The vacuum heating furnace is heated to 800°C ± 10°C again, and then argon partial pressure is applied;

[0031] Step 3: During the argon partial pressure process, the vacuum heating furnace continues to heat up to 1000℃±10℃, and the holding time depends on the thickness of the workpiece;

[0032] Step 4: Take the metal workpiece out of the furnace after heat preservation in step 3 and air cool it to room temperature.

[0033] The beneficial effects of the present invention are as follows: the high-temperature alloy after annealing heat treatment can eliminate internal stress, reduce deformation and cracking, and improve the grain structure of the material to make it more uniform and delicate, thereby improving the material performance. The present invention is suitable for high-temperature alloy thin-walled parts, and the risk of part cracking can be reduced by improving the heat treatment process of the formed parts. The heat treatment part is set up to realize the continuous heat treatment process of the metal workpiece from preheating, heating, insulation to cooling, and the chambers are isolated and sealed by sealed plugs and sealing protrusions to ensure the stability and controllability of the heat treatment environment. The metal workpiece is continuously heat-treated and quenched, with low heat energy consumption and high efficiency in loading and unloading the workpiece, thereby improving the overall heat treatment efficiency. This continuous heat treatment process greatly improves the heat treatment efficiency of the workpiece. The automatic rotation and transfer of the metal workpiece are realized through the design of the transposition component and the drive component. The support chain of the feed component is used to reduce manual operation and reduce labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0035] Figure 1 It is an overall diagram of the present invention;

[0036] Figure 2 It is a furnace diagram of the present invention;

[0037] Figure 3 It is a schematic cross-sectional view of a furnace body of the present invention;

[0038] Figure 4It is a schematic diagram of the transposition assembly of the present invention;

[0039] Figure 5 It is a partial schematic diagram of the driving assembly and the feeding assembly of the present invention;

[0040] Figure 6 For the present invention Figure 3 The enlarged schematic diagram at A in the middle;

[0041] In the figure: heat treatment part 1, base 101, furnace body 11, room temperature chamber 12, low temperature chamber 13, high temperature chamber 14, cooling chamber 15, insertion port 16, plug block 17, sealing protrusion 171, molybdenum heater 18, material door 119, C-shaped support plate 121, oil cylinder 122, transposition component 2, cross support plate 21, storage plate 22, sealing groove 23, drive component 3, servo motor 31, drive rod 32, worm 33, worm wheel 34, horizontal shaft 35, first sprocket 36, transmission chain 37, feed component 4, support frame 41, connecting shaft 42, second sprocket 43, support chain 44, vacuum pump 5, argon gas delivery pipe 6, exhaust pipe 7. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0043] As an embodiment of the present invention, Figure 1-6 As shown, the method for improving high temperature alloy defects by optimizing the heat treatment scheme according to the present invention comprises the following steps:

[0044] Step 1: Select metal powder of the required material, and use SLM metal printing equipment to laser print the metal powder to obtain a metal workpiece;

[0045] Step 2: The metal workpiece is subjected to vacuum annealing treatment in a heat treatment device, and then sent to a vacuum heating furnace for vacuum solution treatment to complete the heat treatment of the metal workpiece;

[0046] Step 3: The heat-treated metal parts are subjected to wire cutting processing by wire cutting equipment to obtain products.

[0047] The present invention also includes that the vacuum annealing temperature of the metal workpiece by the heat treatment device in step 2 is: 500℃±10℃, 800℃±10℃, 60℃, and the solution treatment temperature of the vacuum heating furnace in step 2 is: 500℃±10℃, 800℃±10℃, 1000℃±10℃.

[0048] The present invention also includes that the heat treatment device includes a heat treatment part 1, a transposition component 2, a drive component 3 and a feed component 4, the transposition component 2 is arranged inside the heat treatment part 1, the drive component 3 is installed on the heat treatment part 1, the feed component 4 is located on one side of the heat treatment part 1, and the drive component 3 is connected to the transposition component 2 and the feed component 4;

[0049] The transposition assembly 2 includes a cross support plate 21 and a storage plate 22 . The storage plate 22 is fixedly arranged along the bottom angle of the cross support plate 21 . A sealing groove 23 is arranged on the outer periphery of the cross support plate 21 .

[0050] The present invention also includes that the heat treatment part 1 includes a furnace body 11, the cross support plate 21 is arranged in the furnace body 11, the inner shell of the furnace body 11 is divided into a room temperature chamber 12, a low temperature chamber 13, a high temperature chamber 14 and a cooling chamber 15 in sequence by the cross support plate 21, and the inner walls of the low temperature chamber 13 and the high temperature chamber 14 are both installed with a molybdenum heater 18;

[0051] The room temperature chamber 12, the low temperature chamber 13, the high temperature chamber 14 and the cooling chamber 15 are all provided with extraction and insertion ports 16, and plug blocks 17 for sealing are inserted in the extraction and insertion ports 16. The plug blocks 17 are provided with sealing protrusions 171 corresponding to the sealing grooves 23 on the side close to the cross support plate 21. The outer periphery of the furnace body 11 is equidistantly connected with C-shaped support plates 121, and an oil cylinder 122 is installed on the C-shaped support plate 121. The output end of the oil cylinder 122 is installed with the plug block 17 at the corresponding position.

[0052] The present invention also includes that a material door 119 for loading and unloading materials is provided on one side of the room temperature chamber 12;

[0053] The material door 119, the furnace body 11, the cross support plate 21 and the storage plate 22 are all provided with thermal insulation cotton and a thermal bridge structure;

[0054] An argon gas delivery pipe 6 and an exhaust pipe 7 are respectively installed on the cooling chamber 15 and outside the furnace body 11;

[0055] A vacuum pump 5 is disposed outside the furnace body 11 , and an air inlet end of the vacuum pump 5 is connected to the low-temperature chamber 13 , the high-temperature chamber 14 and the cooling chamber 15 , respectively.

[0056] The present invention also includes that the driving assembly 3 includes a servo motor 31, a driving rod 32, a worm 33 and a worm wheel 34, the servo motor 31 is installed at the top center of the furnace body 11, the driving rod 32 passes through the middle of the cross support plate 21, and is fixed to the cross support plate 21 by a key pin, and the driving end of the servo motor 31 is connected to the rotating shaft of the driving rod 32;

[0057] A base 101 is provided at the bottom of the furnace body 11, and the worm 33 is rotatably installed at the center of the bottom circle of the furnace body 11 through a bearing. The bottom of the driving rod 32 is connected to the rotating shaft of the worm 33. A horizontal axis 35 is horizontally provided on one side of the worm 33. Both ends of the horizontal axis 35 are rotatably connected to the base 101 through bearings. The worm wheel 34 is installed on the horizontal axis 35, and the worm 33 is meshed with the worm wheel 34.

[0058] The present invention also includes that a transmission chain 37 and two first sprockets 36 are provided at one end of the worm 33 , the two first sprockets 36 are respectively meshed with the two ends of the transmission chain 37 , and one of the two first sprockets 36 is installed with the transverse shaft 35 .

[0059] The present invention also includes that the feed assembly 4 includes a support frame 41, a connecting shaft 42 is rotatably mounted at one end of the support frame 41 through a bearing, support chains 44 are respectively arranged on both sides of the support frame 41, and second sprockets 43 are respectively meshed at both ends of the support chain 44, and the second sprocket 43 at one end of the support chain 44 is mounted on the connecting shaft 42, and one end of the connecting shaft 42 is mounted and connected to the other of the two groups of the first sprockets 36;

[0060] The present invention also includes that the vacuum annealing treatment specifically comprises the following steps:

[0061] Step 1: Start the molybdenum heater 18 in the low-temperature chamber 13 and the high-temperature chamber 14 to preheat, open the material door 119, and send the printed metal workpiece to the placement plate 22 in the room-temperature chamber 12, close the material door 119, and use the vacuum pump 5 to evacuate the room-temperature chamber 12, the low-temperature chamber 13, the high-temperature chamber 14, and the cooling chamber 15;

[0062] Step 2: The servo motor 31 drives the driving rod 32 to rotate, so that the driving rod 32 drives the cross support plate 21 to rotate, so that the placement plate 22 of the cross support plate 21 drives the metal workpiece into the low temperature chamber 13, and the vacuum pump 5 evacuates the low temperature chamber 13, and the molybdenum heater 18 in the low temperature chamber 13 is heated to 500°C ± 10°C, and then kept warm for 0.5h;

[0063] Step 3: Open the material door 119, place the printed metal workpiece on the placement plate 22 in the room temperature chamber 12, close the material door 119, evacuate the room temperature chamber 12 through the vacuum pump 5, and the servo motor 31 drives the driving rod 32 to rotate, so that the metal workpiece in the low temperature chamber 13 enters the high temperature chamber 14, and the vacuum pump 5 evacuates the high temperature chamber 14. The molybdenum heater 18 raises the temperature in the high temperature chamber 14 to 800°C±10°C, and then keeps the temperature for 0.5h;

[0064] Step 4: Open the material door 119, place the printed metal workpiece on the placement plate 22 in the room temperature chamber 12, close the material door 119, evacuate the room temperature chamber 12 through the vacuum pump 5, and drive the driving rod 32 to rotate by the servo motor 31, so that the metal workpiece in the high temperature chamber 14 enters the cooling chamber 15, open the argon gas delivery pipe 6 to slowly discharge argon gas from the cooling chamber 15, open the exhaust pipe 7, and slowly discharge and recycle the excess argon gas until the temperature is cooled to below 400°C, and then accelerate the delivery of argon gas to cool the temperature in the cooling chamber 15 to 60°C;

[0065] Step 5: The servo motor 31 drives the driving rod 32 to rotate, so that the metal parts in the cooling chamber 15 enter the room temperature chamber 12, open the material door 119, take out the cooled workpiece in the room temperature chamber 12, further cool the cooled workpiece to room temperature, and put in a new printed metal workpiece, then close the material door 119, and evacuate the room temperature chamber 12 through the vacuum pump 5, and repeat this cycle.

[0066] The present invention also includes that the specific steps of the vacuum solution treatment are as follows:

[0067] Step 1: Place the metal workpiece after vacuum annealing into a vacuum heating furnace, heat the metal workpiece to 500°C ± 10°C, and then keep it warm for 0.5h;

[0068] Step 2: The vacuum heating furnace is heated to 800°C ± 10°C again, and then argon partial pressure is applied;

[0069] Step 3: During the argon partial pressure process, the vacuum heating furnace continues to heat up to 1000℃±10℃, and the holding time depends on the thickness of the workpiece;

[0070] Step 4: Take the metal workpiece out of the furnace after heat preservation in step 3 and air cool it to room temperature.

[0071] When the present invention is used, metal powder of the required material is selected, and the metal powder is laser printed and formed by the SLM metal printing equipment to obtain a metal workpiece, the molybdenum heater 18 in the low-temperature chamber 13 and the high-temperature chamber 14 is opened for preheating, the material door 119 is opened, and the printed metal workpiece is sent to the placement plate 22 located in the room temperature chamber 12, and the material door 119 is closed. The vacuum pump 5 evacuates the room temperature chamber 12, the low temperature chamber 13, the high temperature chamber 14, and the cooling chamber 15, and the servo motor 31 drives the driving rod 32 to rotate, so that the driving rod 32 drives the cross support plate 21 and the worm gear 34 to rotate, and the placement plate 22 of the cross support plate 21 drives the metal workpiece to enter the low temperature chamber 13, and the vacuum pump 5 evacuates the low temperature chamber 13, and the low temperature chamber 13 is evacuated. The molybdenum heater 18 in the temperature chamber 13 is heated to 500°C ± 10°C, then kept warm for 0.5h, the material door 119 is opened, and the printed metal workpiece is placed on the placement plate 22 in the room temperature chamber 12, the material door 119 is closed, and the room temperature chamber 12 is evacuated by the vacuum pump 5, and the servo motor 31 drives the driving rod 32 to rotate, so that the metal workpiece in the low temperature chamber 13 enters the high temperature chamber 14, and the vacuum pump 5 evacuates the high temperature chamber 14. The molybdenum heater 18 heats the high temperature chamber 14 to 800°C ± 10°C, and then kept warm for 0.5h, the material door 119 is opened, and the printed metal workpiece is placed on the placement plate 22 in the room temperature chamber 12, the material door 119 is closed, and the room temperature chamber 12 is evacuated by the vacuum pump 5, and the servo The motor 31 drives the driving rod 32 to rotate, so that the metal workpiece in the high-temperature chamber 14 enters the cooling chamber 15, the argon delivery pipe 6 is opened to slowly discharge the argon gas in the cooling chamber 15, the exhaust pipe 7 is opened, and the excess argon gas is slowly discharged and recovered until the temperature is cooled to below 400°C, and then the argon gas delivery is accelerated to cool the temperature in the cooling chamber 15 to 60°C, the servo motor 31 drives the driving rod 32 to rotate, so that the metal piece in the cooling chamber 15 enters the room temperature chamber 12, the material door 119 is opened, the cooled workpiece in the room temperature chamber 12 is taken out, the cooled workpiece is further cooled to room temperature, and a new printed metal workpiece is placed, and then the material door 119 is closed, and the room temperature chamber 12 is evacuated by the vacuum pump 5, and this cycle is continuously repeated. The workpiece is heat treated and quenched, and the heat energy consumption is low. The workpiece loading and unloading efficiency is high, which improves the overall heat treatment efficiency. The high-temperature alloy after annealing heat treatment can eliminate internal stress, reduce deformation and cracking, and improve the grain structure of the material to make it more uniform and delicate, thereby improving the material performance. The metal workpiece after vacuum annealing is sent into the vacuum heating furnace, and the metal workpiece is heated to 500℃±10℃ with the furnace, and then kept warm for 0.5h. The vacuum heating furnace is heated to 800℃±10℃ again, and then argon partial pressure is performed. During the argon partial pressure process, the vacuum heating furnace continues to heat to 1000℃±10℃, and the holding time depends on the thickness of the workpiece. The metal workpiece after insulation is taken out of the furnace and air-cooled to room temperature.

[0072] Among them, the metal workpiece is fed through the feeding assembly 4, and the metal workpiece is supported by the support chain 44 during the process. Every time the cross support plate 21 rotates once, the worm wheel 34 also rotates synchronously, and the worm wheel 34 drives the worm wheel 34 to rotate. The worm wheel 34 transmits the power to the horizontal shaft 35, so that the first sprocket 36 rotates, and the power is transmitted to the connecting shaft 42 through the transmission chain 37, and the connecting shaft 42 synchronizes the transmission power to the second sprocket 43 and the support chain 44, so that every time the cross support plate 21 drives the metal workpiece to rotate and transmit in the room temperature chamber 12, the low temperature chamber 13, the high temperature chamber 14, and the cooling chamber 15, the support chain 44 of the feeding assembly 4 sequentially delivers the newly printed metal workpiece to the furnace body 11 for the heat treatment workers to take.

[0073] Among them, each time the servo motor 31 runs, the output end of the cylinder 122 retracts. When the servo motor 31 stops, the output end of the cylinder 122 outputs, so that after the cross support plate 21 finishes moving, the insert block 17 is pushed in by the cylinder 122 and pressed tightly against the outer periphery of the cross support plate 21, and good sealing is maintained between the cavities.

[0074] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for improving high temperature alloy defects by optimizing heat treatment scheme, characterized in that: The following steps are involved: Step 1: Select metal powder of the required material, and use SLM metal printing equipment to laser print the metal powder to obtain a metal workpiece; Step 2: The metal workpiece is subjected to vacuum annealing treatment in a heat treatment device, and then sent to a vacuum heating furnace for vacuum solution treatment to complete the heat treatment of the metal workpiece; Step 3: The heat-treated metal parts are subjected to wire cutting processing by wire cutting equipment to obtain products.

2. The method for improving high temperature alloy defects by optimizing heat treatment scheme according to claim 1, characterized in that: The vacuum annealing temperatures of the heat treatment device for the metal workpiece in step 2 are: 500℃±10℃, 800℃±10℃, 60℃, respectively; the solution treatment temperatures of the vacuum heating furnace in step 2 are: 500℃±10℃, 800℃±10℃, 1000℃±10℃, respectively.

3. The method for improving high temperature alloy defects by optimizing heat treatment scheme according to claim 2, characterized in that: The heat treatment device comprises a heat treatment part (1), a transposition component (2), a driving component (3) and a feeding component (4), wherein the transposition component (2) is arranged inside the heat treatment part (1), the driving component (3) is installed on the heat treatment part (1), the feeding component (4) is located on one side of the heat treatment part (1), and the driving component (3) is connected to the transposition component (2) and the feeding component (4); The transposition assembly (2) comprises a cross support plate (21) and a storage plate (22); the storage plate (22) is fixedly arranged along the bottom angle of the cross support plate (21); and a sealing groove (23) is arranged on the outer periphery of the cross support plate (21).

4. The method for improving high temperature alloy defects by optimizing heat treatment scheme according to claim 3, characterized in that: The heat treatment part (1) comprises a furnace body (11), the cross support plate (21) is arranged in the furnace body (11), the inner shell of the furnace body (11) is divided into a room temperature chamber (12), a low temperature chamber (13), a high temperature chamber (14) and a cooling chamber (15) in sequence by the cross support plate (21), and the inner walls of the low temperature chamber (13) and the high temperature chamber (14) are both installed with molybdenum heaters (18); Insertion and extraction ports (16) are provided between the room temperature chamber (12), the low temperature chamber (13), the high temperature chamber (14) and the cooling chamber (15); a plug block (17) for sealing is inserted into the insertion and extraction port (16); a sealing protrusion (171) corresponding to the sealing groove (23) is provided on a side of the plug block (17) close to the cross support plate (21); a C-shaped support plate (121) is connected to the outer periphery of the furnace body (11) at equal distances; an oil cylinder (122) is installed on the C-shaped support plate (121); and an output end of the oil cylinder (122) is installed with the plug block (17) at a corresponding position.

5. The method for improving high temperature alloy defects by optimizing heat treatment scheme according to claim 4, characterized in that: A material door (119) for loading and unloading materials is provided on one side of the room temperature chamber (12); The material door (119), the furnace body (11), the cross support plate (21) and the storage plate (22) are all provided with thermal insulation cotton and a thermal break bridge structure; An argon gas delivery pipe (6) and an exhaust pipe (7) are respectively installed on the cooling chamber (15) and outside the furnace body (11); A vacuum pump (5) is arranged outside the furnace body (11), and an air inlet end of the vacuum pump (5) is respectively connected to the low-temperature chamber (13), the high-temperature chamber (14) and the cooling chamber (15).

6. The method for improving high temperature alloy defects by optimizing heat treatment scheme according to claim 5, characterized in that: The driving assembly (3) comprises a servo motor (31), a driving rod (32), a worm (33) and a worm wheel (34); the servo motor (31) is mounted at the top center of the furnace body (11); the driving rod (32) passes through the middle of the cross support plate (21) and is fixed to the cross support plate (21) by a key pin; the driving end of the servo motor (31) is connected to the rotating shaft of the driving rod (32); A base (101) is provided at the bottom of the furnace body (11); the worm (33) is rotatably mounted at the center of the bottom circle of the furnace body (11) via a bearing; the bottom of the driving rod (32) is connected to the rotating shaft of the worm (33); a transverse axis (35) is transversely arranged on one side of the worm (33); both ends of the transverse axis (35) are rotatably connected to the base (101) via bearings; the worm wheel (34) is mounted on the transverse axis (35); and the worm (33) is meshed with the worm wheel (34).

7. The method for improving high temperature alloy defects by optimizing heat treatment scheme according to claim 6, characterized in that: A transmission chain (37) and two first sprockets (36) are provided at one end of the worm (33); the two first sprockets (36) are respectively meshed with two ends of the transmission chain (37); and one of the two first sprockets (36) is installed with the transverse shaft (35).

8. The method for improving high temperature alloy defects by optimizing heat treatment scheme according to claim 7, characterized in that: The feeding assembly (4) comprises a support frame (41), a connecting shaft (42) is rotatably mounted on one end of the support frame (41) via a bearing, support chains (44) are respectively arranged on both sides of the support frame (41), and second sprockets (43) are respectively meshed at both ends of the support chain (44), the second sprocket (43) at one end of the support chain (44) is mounted on the connecting shaft (42), and one end of the connecting shaft (42) is mounted and connected to the other of the two groups of the first sprockets (36).

9. The method for improving high temperature alloy defects by optimizing heat treatment scheme according to claim 8, characterized in that: The specific steps of the vacuum annealing treatment are as follows: Step 1: start the molybdenum heater (18) in the low temperature chamber (13) and the high temperature chamber (14) to preheat, open the material door (119), send the printed metal workpiece to the placement plate (22) in the room temperature chamber (12), close the material door (119), and use the vacuum pump (5) to evacuate the room temperature chamber (12), the low temperature chamber (13), the high temperature chamber (14), and the cooling chamber (15); Step 2: The servo motor (31) drives the driving rod (32) to rotate, so that the driving rod (32) drives the cross support plate (21) to rotate, so that the storage plate (22) of the cross support plate (21) drives the metal workpiece into the low temperature chamber (13), the vacuum pump (5) evacuates the low temperature chamber (13), and the molybdenum heater (18) in the low temperature chamber (13) is heated to 500°C ± 10°C, and then kept warm for 0.5h; Step 3: Open the material door (119), place the printed metal workpiece on the placement plate (22) in the room temperature chamber (12), close the material door (119), evacuate the room temperature chamber (12) through the vacuum pump (5), drive the driving rod (32) to rotate by the servo motor (31), so that the metal workpiece in the low temperature chamber (13) enters the high temperature chamber (14), evacuate the high temperature chamber (14) through the vacuum pump (5), and heat the high temperature chamber (14) to 800°C±10°C by the molybdenum heater (18), and then keep the temperature for 0.5h; Step 4: Open the material door (119), place the printed metal workpiece on the placement plate (22) in the room temperature chamber (12), close the material door (119), evacuate the room temperature chamber (12) through the vacuum pump (5), drive the driving rod (32) to rotate by the servo motor (31), so that the metal workpiece in the high temperature chamber (14) enters the cooling chamber (15), open the argon gas delivery pipe (6) to slowly discharge argon gas into the cooling chamber (15), open the exhaust pipe (7), slowly discharge and recover the excess argon gas until the temperature is cooled to below 400° C., and then accelerate the delivery of argon gas to cool the temperature in the cooling chamber (15) to 60° C.; Step 5: The servo motor (31) drives the driving rod (32) to rotate, so that the metal parts in the cooling chamber (15) enter the room temperature chamber (12), open the material door (119), take out the workpiece cooled in the room temperature chamber (12), allow the cooled workpiece to be further cooled to room temperature, and put in a new printed metal workpiece, then close the material door (119), and evacuate the room temperature chamber (12) through the vacuum pump (5), and repeat the cycle.

10. The method for improving high temperature alloy defects by optimizing heat treatment scheme according to claim 1, characterized in that: The specific steps of the vacuum solution treatment are as follows: Step 1: Place the metal workpiece after vacuum annealing into a vacuum heating furnace, heat the metal workpiece to 500°C ± 10°C, and then keep it warm for 0.5h; Step 2: The vacuum heating furnace is heated to 800°C ± 10°C again, and then argon partial pressure is applied; Step 3: During the argon partial pressure process, the vacuum heating furnace continues to heat up to 1000℃±10℃, and the holding time depends on the thickness of the workpiece; Step 4: Take the metal workpiece out of the furnace after heat preservation in step 3 and air cool it to room temperature.

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