CN115476025B - Method and device for adding material to heterogeneous double-wire in-situ alloying plasma arc - Google Patents
Method and device for adding material to heterogeneous double-wire in-situ alloying plasma arc Download PDFInfo
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- CN115476025B CN115476025B CN202211218271.5A CN202211218271A CN115476025B CN 115476025 B CN115476025 B CN 115476025B CN 202211218271 A CN202211218271 A CN 202211218271A CN 115476025 B CN115476025 B CN 115476025B
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000005275 alloying Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 35
- 229910001240 Maraging steel Inorganic materials 0.000 claims abstract description 34
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000956 alloy Substances 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims description 56
- 230000000996 additive effect Effects 0.000 claims description 55
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 33
- 238000000151 deposition Methods 0.000 claims description 21
- 230000008021 deposition Effects 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 12
- 239000011229 interlayer Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000005137 deposition process Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 229910001338 liquidmetal Inorganic materials 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a heterogeneous double-wire in-situ alloying plasma arc material adding method and device. When the material is added, the robot control cabinet synchronously controls the material adding power supply, ignites the plasma arc, and two heterogeneous phase fuse materials are synchronously fed into the molten pool, and are solidified to form a base material after being fully metallurgically in the molten pool, and the heterogeneous double-wire in-situ alloying material adding is realized by adjusting the wire feeding speed of the two wires to regulate and control the liquid metal components in the molten pool in situ. The method adopts a heterogeneous double-wire in-situ alloying plasma arc material adding method, uses two fusible wires of maraging steel and high-nitrogen austenitic steel, and generates the iron-based alloy with adjustable and controllable components, tissues and performances in situ by controlling the wire feeding speed of the two wires, wherein the ultimate tensile strength is adjustable from 450MPa to 950MPa, and the elongation after breaking is adjustable from 15% to 56%.
Description
Technical Field
The invention belongs to the field of arc additive manufacturing, and mainly relates to a method and a device for heterogeneous double-wire in-situ alloying plasma arc additive.
Background
The metal material is considered as the most important structural material in the development of the current society due to the excellent processability and comprehensive mechanical properties, and the metal material has higher requirements on the comprehensive properties along with more complicated application scenes and more malignant deterioration of service environments of the metal material, so that the metal material system is required to be continuously optimized and perfected. The preparation of new materials is conventionally completed in a series of modes such as metallurgical smelting, casting, forging, heat treatment and the like, and the preparation method has the advantages of high cost, long period and large pollution, so that the new materials are urgently required to be rapidly prepared and verified in a new processing and manufacturing mode.
Disclosure of Invention
The invention aims to provide a heterogeneous double-wire in-situ alloying plasma arc material adding method, which meets the manufacturing requirement of a novel iron-based alloy material and realizes the control and reinforcement of alloy components, tissues and performances.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a heterogeneous double-wire in-situ alloying plasma arc material adding method, in-situ alloying is realized by simultaneously melting an 18Ni (350) maraging steel wire and an HNS6T high-nitrogen austenitic stainless steel wire in a certain mass fraction ratio under a non-consumable electrode arc; the mass fraction ratio of the 18Ni (350) maraging steel to the HNS6T high-nitrogen austenitic stainless steel is as follows: 9:1, 8:2, 7:3.
Preferably, the HNS6T high nitrogen austenitic stainless steel has a diameter of 1.2mm and the 18Ni (350) maraging steel has a diameter of 1mm.
A heterogeneous double-wire in-situ alloying plasma arc material adding method comprises the following specific steps:
step 1, before deposition, adjusting the included angle between two wire guide nozzles and a substrate to be (15-30 degrees), and adjusting the included angle between wire feeding to be (60-90 degrees), so as to ensure that two wires are synchronously and directly fed into a central region of a plasma arc, and the two wires are melted and fully metallurgically in the same molten pool;
step 2, preheating a substrate according to the size of an actual heterogeneous double-wire in-situ alloying additive component;
step 3, switching on a power supply, waiting for the communication signal of the whole system to be in place, and setting a forming path program according to the geometric model of the additive parts; according to the iron-based alloy components, calculating the quality of A, B wires required in the deposition process, making a wire feeding speed proportioning scheme of the two wires, and presetting through a double-wire coordination control module; presetting an additive current and an additive voltage according to wire feeding speeds of two wires;
step 4, after the robot carries the material adding gun body to reach a preset arcing position and ignites an electric arc, simultaneously conveying the 18Ni (350) maraging steel wire and the HNS6T high-nitrogen austenitic stainless steel wire to an electric arc center to be in the same molten pool, and depositing according to a preset path;
step 5, after the infrared thermal imager monitors that the deposition layer is cooled to the preset interlayer temperature, the plasma additive gun body is moved to the next starting point, and the next deposition is started;
and 6, repeating the steps 4 to 5 until the dimension of the additive reaches the preset design, and obtaining the iron-based alloy material and structure with adjustable components, tissues and properties.
Preferably, the substrate is preheated by adopting the method that no wire is fed for arcing and the preheating is carried out, the preheating temperature is 250 ℃, and the area of the preheating area is larger than the size of the heterogeneous material-increasing piece block.
Preferably, the preset additive current is 50-250A, and the additive voltage is 5-45V.
As a preferred mode, regarding the composition ratio design, the physical density difference of the two materials is very small, the density of the two materials can be approximately considered to be equal in additive manufacturing, according to m=ρv, the mass fraction ratio can be controlled by controlling the volume fraction ratio of the dissimilar materials, and according to v=v f ·t·S(v f Representing wire feed speed, t representing additive time, S representing cross-sectional area of the wire) it is known that the wire volume fraction is controlled by the wire feed speed.
Preferably, the preset interlayer temperature is 100 ℃.
Compared with the prior art, the invention has the following advantages: 1. the method and the device for adding the material to the heterogeneous double-wire in-situ alloying plasma arc adopt the plasma arc to melt the wire, have the advantages of low manufacturing cost and high material adding efficiency compared with the manufacturing of laser and electron beam powder, have the characteristics of high temperature and good bundling property of heat sources similar to laser, electron beam and the like, and can better control the forming precision, the forming quality and the mechanical property of the iron-based alloy; 2. the method can realize in-situ melting and solidification of the heterogeneous wires, regulate and control the deposition amount of the wires by controlling the feeding speed of the two wires, further regulate and control the composition of the iron-based alloy steel, generate heterogeneous structural members of heterogeneous steel with different component proportions by in-situ alloying in an additive manufacturing mode, and realize controllable alloy performance; 3. the method can fully mix two wires to form a mixed structure with uniformly distributed components, firstly, liquid drops melted at the ends of the two wires are mixed for the first time under the action of surface tension, electromagnetic force and the like, the liquid drops enter a molten pool and are mixed for the second time under the action of stirring force of the molten pool and electric arc swing, and when the molten drops are deposited upwards, the molten drops are mixed for the third time under the action of remelting of a subsequent deposited layer, so that the uniformity of alloy components is fully ensured, and important references are provided for heterogeneous metal mixed interface characterization and performance analysis; 4. compared with the layered overlapped material-increasing heterogeneous material, the in-situ generation alloy material of the double-wire eutectic pool provided by the invention has the advantages that the synergistic enhancement effect among multiple components is improved, and a new thought is provided for heterogeneous material-increasing aiming at realizing the obdurability matching of the material.
Drawings
Fig. 1 is a schematic structural diagram of a heterogeneous double-wire in-situ alloying plasma arc additive device.
FIG. 2 is a maraging steel of 18Ni (350): HNS6T high nitrogen austenitic stainless steel is a 9:1 additive block.
Fig. 3 is an 18Ni (350) maraging steel: HNS6T high nitrogen austenitic stainless steel is a metallographic structure diagram of 100 times of 9:1. Fig. 4 is an 18Ni (350) maraging steel: HNS6T high nitrogen austenitic stainless steel has a 9:1 bulk XRD pattern. Fig. 5 is an 18Ni (350) maraging steel: HNS6T high nitrogen austenitic stainless steel is an additive block of 8:2.
Fig. 6 is an 18Ni (350) maraging steel: HNS6T high nitrogen austenitic stainless steel is a metallographic structure diagram of 100 times of 8:2. Fig. 7 is an 18Ni (350) maraging steel: HNS6T high nitrogen austenitic stainless steel has a bulk XRD pattern of 8:2. Fig. 8 is an 18Ni (350) maraging steel: HNS6T high nitrogen austenitic stainless steel is a 7:3 additive block.
Fig. 9 is an 18Ni (350) maraging steel: HNS6T high nitrogen austenitic stainless steel is a metallographic structure diagram of 100 times of 7:3.
Fig. 10 is an 18Ni (350) maraging steel: HNS6T high nitrogen austenitic stainless steel is a 7:3 bulk XRD pattern.
Fig. 11 is a graph of true stress strain curves for three proportional additives.
Wherein, 1 is the robot control cabinet, 2 is the infrared thermal imaging appearance, 3 is the display, 4 is the plasma vibration material layer rifle body, 5 is the robot, 6 is the plasma control cabinet, 7 is the vibration material layer power, 8 is two silk coordinated controllers, 9 is I wire feeder, 10 is II wire feeder, 11 is the base plate.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
The invention provides a heterogeneous double-wire in-situ alloying plasma arc additive method, which allows for rapid preparation and verification of different components of an alloy and allows for expansion of a material library available for arc additive processing.
The invention takes 18Ni (350) maraging steel as a main body, high-nitrogen austenitic stainless steel is properly added to prepare a new material, the new material has certain strength and good plasticity and toughness, the corresponding wire feeding speed of the maraging steel and the high-nitrogen austenitic steel is calculated according to alloy components and is set, and two dissimilar wires are melted and solidified in the same molten pool through a plasma arc additive manufacturing technology to generate a prototype alloy material and structure with controllable components, tissues and performances in situ.
A heterogeneous double-wire in-situ alloying plasma arc material adding method, in-situ alloying is realized by simultaneously melting an 18Ni (350) maraging steel wire and an HNS6T high-nitrogen austenitic stainless steel wire in a certain mass fraction ratio under a non-consumable electrode arc; the mass fraction ratio of the 18Ni (350) maraging steel to the HNS6T high-nitrogen austenitic stainless steel is as follows: 9:1, 8:2, 7:3.
The HNS6T high nitrogen austenitic stainless steel had a diameter of 1.2mm and the 18Ni (350) maraging steel had a diameter of 1mm.
Example 1
18Ni (350) maraging steel was subjected to the method of the invention as described above: HNS6T high nitrogen austenitic stainless steel was 9:1, the specific steps are as follows:
step 1, before deposition, adjusting the included angle between two wire guide nozzles and a substrate to be (15-30 degrees), and adjusting the included angle between wire feeding to be (60-90 degrees), so as to ensure that two wires are synchronously and directly fed into a central region of a plasma arc, and the two wires are melted and fully metallurgically in the same molten pool;
step 2, preheating a substrate according to the size of an actual heterogeneous double-wire in-situ alloying additive component;
step 3, switching on a power supply, waiting for the communication signal of the whole system to be in place, and setting a forming path program according to the geometric model of the additive parts; according to the iron-based alloy components, calculating the quality of two wires required in the deposition process, making a wire feeding speed proportioning scheme of the two wires, and presetting through a double-wire coordination control module; presetting an additive current and an additive voltage according to wire feeding speeds of two wires;
step 4, after the robot carries the material adding gun body to reach a preset arcing position and ignites an electric arc, simultaneously conveying the 18Ni (350) maraging steel wire and the HNS6T high-nitrogen austenitic stainless steel wire to an electric arc center to be in the same molten pool, and depositing according to a preset path;
step 5, after the infrared thermal imager monitors that the deposition layer is cooled to the preset interlayer temperature, the plasma additive gun body is moved to the next starting point, and the next deposition is started;
and 6, repeating the steps 4 to 5 until the dimension of the additive reaches the preset design, and obtaining the iron-based alloy material and structure with the ultimate strength of 950MPa and the elongation after fracture of 15%.
As a preferable mode, the HNS6T high-nitrogen austenitic stainless steel wire feeding speed is calculated to be 0.14m/min, the 18Ni (350) maraging steel wire feeding speed is calculated to be 1.86m/min, the welding current is 170A, the electric arc advancing speed is calculated to be 18cm/min, the ion gas is calculated to be 1.2L/min, and the shielding gas is calculated to be 18L/min.
18Ni high-strength steel shown in FIG. 2: HNS6T high nitrogen austenitic stainless steel was 9:1, the interlayer combination is good, no obvious defects such as cracks, air holes and the like appear, and the integral forming is good. Figures 3 and 4 are 100 x metallographic and XRD patterns, respectively, of the additive sample, and it can be seen that the additive sample structure is mainly lath-shaped martensite and a small amount of austenite, and the structure is compact and defect-free. The tensile strength is 864MPa, the elongation after fracture is 15.8%, and the internal elements are uniformly distributed without obvious segregation phenomenon through EDS test analysis.
Example 2
18Ni (350) maraging steel was subjected to the method of the invention as described above: HNS6T high nitrogen austenitic stainless steel was 8:2, the specific steps are as follows:
step 1, before deposition, adjusting the included angle between two wire guide nozzles and a substrate to be (15-30 degrees), and adjusting the included angle between wire feeding to be (60-90 degrees), so as to ensure that two wires are synchronously and directly fed into a central region of a plasma arc, and the two wires are melted and fully metallurgically in the same molten pool;
step 2, preheating a substrate according to the size of an actual heterogeneous double-wire in-situ alloying additive component;
step 3, switching on a power supply, waiting for the communication signal of the whole system to be in place, and setting a forming path program according to the geometric model of the additive parts; according to the iron-based alloy components, calculating the quality of A, B wires required in the deposition process, making a wire feeding speed proportioning scheme of the two wires, and presetting through a double-wire coordination control module; presetting an additive current and an additive voltage according to wire feeding speeds of two wires;
step 4, after the robot carries the material adding gun body to reach a preset arcing position and ignites an electric arc, simultaneously conveying the 18Ni (350) maraging steel wire and the HNS6T high-nitrogen austenitic stainless steel wire to an electric arc center to be in the same molten pool, and depositing according to a preset path;
step 5, after the infrared thermal imager monitors that the deposition layer is cooled to the preset interlayer temperature, the plasma additive gun body is moved to the next starting point, and the next deposition is started;
and 6, repeating the steps 4 to 5 until the dimension of the additive reaches the preset design, and obtaining the iron-based alloy material and structure with the ultimate strength of 550MPa and the elongation percentage of 49% after fracture.
As a preferable mode, the HNS6T high-nitrogen austenitic stainless steel wire feeding speed is calculated to be 0.3m/min, the 18Ni (350) maraging steel wire feeding speed is calculated to be 1.7m/min, the welding current is 170A, the electric arc advancing speed is calculated to be 18cm/min, the ion gas is calculated to be 1.2L/min, and the shielding gas is calculated to be 18L/min.
18Ni (350) maraging steel as shown in FIG. 5: HNS6T high nitrogen austenitic stainless steel was 8:2, the interlayer combination is good, no obvious defects such as cracks, air holes and the like appear, and the integral forming is good. Fig. 6 and 7 are a photograph of a 100-fold metallographic structure and an XRD pattern of the additive sample, respectively, and it can be seen that the structure of the additive sample is mainly austenite and a small amount of martensite, and the structure is compact and defect-free. The tensile strength is 536MPa, the elongation after break is 49.1%, and the internal elements are uniformly distributed without obvious segregation phenomenon by EDS test analysis.
Example 3
18Ni (350) maraging steel was subjected to the method of the invention as described above: HNS6T high nitrogen austenitic stainless steel is 7:3, the specific steps are as follows:
step 1, before deposition, adjusting the included angle between two wire guide nozzles and a substrate to be (15-30 degrees), and adjusting the included angle between wire feeding to be (60-90 degrees), so as to ensure that two wires are synchronously and directly fed into a central region of a plasma arc, and the two wires are melted and fully metallurgically in the same molten pool;
step 2, preheating a substrate according to the size of an actual heterogeneous double-wire in-situ alloying additive component;
step 3, switching on a power supply, waiting for the communication signal of the whole system to be in place, and setting a forming path program according to the geometric model of the additive parts; according to the iron-based alloy components, calculating the quality of A, B wires required in the deposition process, making a wire feeding speed proportioning scheme of the two wires, and presetting through a double-wire coordination control module; presetting an additive current and an additive voltage according to wire feeding speeds of two wires;
step 4, after the robot carries the material adding gun body to reach a preset arcing position and ignites an electric arc, simultaneously conveying the 18Ni (350) maraging steel wire and the HNS6T high-nitrogen austenitic stainless steel wire to an electric arc center to be in the same molten pool, and depositing according to a preset path;
step 5, after the infrared thermal imager monitors that the deposition layer is cooled to the preset interlayer temperature, the plasma additive gun body is moved to the next starting point, and the next deposition is started;
and 6, repeating the steps 4 to 5 until the dimension of the additive reaches the preset design, and obtaining the iron-based alloy material and structure with the ultimate strength of 450MPa and the elongation after fracture of 56%.
As a preferable mode, the HNS6T high-nitrogen austenitic stainless steel wire feeding speed is calculated to be 0.46m/min, the 18Ni (350) maraging steel wire feeding speed is calculated to be 1.54m/min, the welding current is 170A, the electric arc advancing speed is calculated to be 18cm/min, the ion gas is calculated to be 1.2L/min, and the shielding gas is calculated to be 18L/min.
18Ni (350) maraging steel as shown in FIG. 8: HNS6T high nitrogen austenitic stainless steel is 7:3, the additive block has good interlayer combination, no obvious defects such as cracks, air holes and the like, and good integral forming. Fig. 9 and 10 are a photograph of a metallographic structure of 100 times and an XRD pattern of the additive sample, respectively, and it can be seen that the structure of the additive sample is mainly an austenite columnar crystal, and the structure is compact and defect-free. The tensile strength of the steel is 494MPa, the elongation after fracture is 55.6%, and the EDS test analysis shows that the internal elements are uniformly distributed without obvious segregation phenomenon.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Modifications, substitutions, improvements, etc. made under the principles of the present invention should be within the scope of the present invention.
Claims (7)
1. The method for adding materials to heterogeneous double-wire in-situ alloying plasma arc is characterized in that in-situ alloying is realized by simultaneously melting an 18Ni350 maraging steel wire and an HNS6T high-nitrogen austenitic stainless steel wire in a certain mass fraction ratio under a non-consumable electrode arc; the mass fraction ratio of the 18Ni350 maraging steel to the HNS6T high-nitrogen austenitic stainless steel is as follows: 9:1, 8:2 or 7:3.
2. The method of heterogeneous double wire in situ alloying plasma arc additive according to claim 1, wherein: the HNS6T high nitrogen austenitic stainless steel has a diameter of 1.2mm and the 18Ni350 maraging steel has a diameter of 1mm.
3. The method of heterogeneous twin wire in situ alloying plasma arc additive according to any of claims 1-2 comprising the specific steps of:
step 1, before deposition, adjusting the included angle between two wire guide nozzles and a substrate to 15-30 degrees, adjusting the included angle between wire feeding to 60-90 degrees, ensuring that two wires are synchronously and directly fed into a central region of a plasma arc, and enabling the two wires to be melted and fully metallurgically in the same molten pool;
step 2, preheating a substrate according to the size of an actual heterogeneous double-wire in-situ alloying additive component;
step 3, switching on a power supply, waiting for the communication signal of the whole system to be in place, and setting a forming path program according to the geometric model of the additive parts; according to the iron-based alloy components, calculating the quality of two wires required in the deposition process, making a wire feeding speed proportioning scheme of the two wires, and presetting through a double-wire coordination control module; presetting an additive current and an additive voltage according to wire feeding speeds of two wires;
step 4, after the robot carries the material adding gun body to reach a preset arcing position and ignites the arc, simultaneously conveying the 18Ni350 maraging steel wire and the HNS6T high-nitrogen austenitic stainless steel wire to an arc center to be in the same molten pool, and depositing according to a preset path;
step 5, after the infrared thermal imager monitors that the deposition layer is cooled to the preset interlayer temperature, the plasma additive gun body is moved to the next starting point, and the next deposition is started;
and 6, repeating the steps 4 to 5 until the dimension of the additive reaches the preset design, and obtaining the iron-based alloy material structure with adjustable components, tissues and properties.
4. A method of heterogeneous double wire in situ alloying plasma arc addition according to claim 3, wherein: the substrate is preheated by adopting the method that no wire is fed for blank preheating by arcing, the preheating temperature is 250 ℃, and the area of a preheating area is larger than the size of a heterogeneous material-increasing piece block.
5. A method of heterogeneous double wire in situ alloying plasma arc addition according to claim 3, wherein: in the step 3, the preset welding current is 50-250A, and the welding voltage is 5-45V.
6. A method of heterogeneous double wire in situ alloying plasma arc addition according to claim 3, wherein: in step 2, the composition ratio is designed so that the difference of the physical densities of the two wires is small, the densities of the two wires are considered to be equal in additive manufacturing, the mass fraction ratio is controlled by controlling the volume fraction ratio of the dissimilar wires according to m=ρv, and the mass fraction ratio is controlled according to v=v f ·t·S，v f Representing wire feed speed, t representing additive time, S representing cross-sectional area of the wire, and wire volume fraction being controlled by the wire feed speed.
7. A method of heterogeneous double wire in situ alloying plasma arc addition according to claim 3, wherein: in step 5, the preset interlayer temperature is 100 ℃.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108067715A (en) * | 2016-11-11 | 2018-05-25 | 南京理工大学 | A kind of double cold automatic increasing material manufacturing method and devices that fill silk of robot plasma arc |
| CN109693019A (en) * | 2017-10-20 | 2019-04-30 | 南京理工大学 | A method of high-strength high hard stainless steel is prepared using silk material arc-melting |
| CN109926695A (en) * | 2017-12-15 | 2019-06-25 | 南京理工大学 | A kind of robot single machine is the same as the double non-melt pole electrical arc increasing material manufacturing method and apparatus that fill silk of mouth |
| CN109926705A (en) * | 2017-12-15 | 2019-06-25 | 南京理工大学 | A kind of double heated filament increasing material manufacturing method and devices of plasma arc dual power supply for robot |
| CN112139650A (en) * | 2020-09-02 | 2020-12-29 | 南京理工大学 | Method for preparing intermetallic compound component based on additive manufacturing method in situ additive manufacturing |
| CN114799413A (en) * | 2022-03-08 | 2022-07-29 | 南京理工大学 | High-toughness heterogeneous metal in-channel interwoven composite material and electric arc additive manufacturing method thereof |
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| US9937580B2 (en) * | 2014-01-24 | 2018-04-10 | Lincoln Global, Inc. | Method and system for additive manufacturing using high energy source and hot-wire |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108067715A (en) * | 2016-11-11 | 2018-05-25 | 南京理工大学 | A kind of double cold automatic increasing material manufacturing method and devices that fill silk of robot plasma arc |
| CN109693019A (en) * | 2017-10-20 | 2019-04-30 | 南京理工大学 | A method of high-strength high hard stainless steel is prepared using silk material arc-melting |
| CN109926695A (en) * | 2017-12-15 | 2019-06-25 | 南京理工大学 | A kind of robot single machine is the same as the double non-melt pole electrical arc increasing material manufacturing method and apparatus that fill silk of mouth |
| CN109926705A (en) * | 2017-12-15 | 2019-06-25 | 南京理工大学 | A kind of double heated filament increasing material manufacturing method and devices of plasma arc dual power supply for robot |
| CN112139650A (en) * | 2020-09-02 | 2020-12-29 | 南京理工大学 | Method for preparing intermetallic compound component based on additive manufacturing method in situ additive manufacturing |
| CN114799413A (en) * | 2022-03-08 | 2022-07-29 | 南京理工大学 | High-toughness heterogeneous metal in-channel interwoven composite material and electric arc additive manufacturing method thereof |
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