CN115319329A - Method for repairing aluminum bronze block part by CMT arc additive and wire used in method - Google Patents
Method for repairing aluminum bronze block part by CMT arc additive and wire used in method Download PDFInfo
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- CN115319329A CN115319329A CN202211032025.0A CN202211032025A CN115319329A CN 115319329 A CN115319329 A CN 115319329A CN 202211032025 A CN202211032025 A CN 202211032025A CN 115319329 A CN115319329 A CN 115319329A
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- arc additive
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- 239000000654 additive Substances 0.000 title claims abstract description 74
- 230000000996 additive effect Effects 0.000 title claims abstract description 74
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 45
- 229910000906 Bronze Inorganic materials 0.000 title claims abstract description 35
- 239000010974 bronze Substances 0.000 title claims abstract description 35
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000008439 repair process Effects 0.000 claims abstract description 35
- 238000003466 welding Methods 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010891 electric arc Methods 0.000 claims abstract description 14
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 13
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 13
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 12
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000004907 flux Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 16
- 238000000137 annealing Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000005253 cladding Methods 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 239000011229 interlayer Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 8
- 238000007639 printing Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000005491 wire drawing Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 9
- 230000007547 defect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- 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 discloses a wire for CMT arc additive repair of an aluminum bronze block part, which is characterized by comprising a flux core and a welding skin, wherein the flux core comprises the following components in percentage by mass: 15-20% of nickel powder, 10-15% of aluminum powder, 1.0% of silicon powder, 5-7% of tungsten powder, 8-10% of iron powder, 10-15% of cobalt powder and lanthanum powder: 0.5-1.0%, zinc powder: 2-4 percent of copper powder as the rest, and the sum of the mass percentages of the components is 100 percent. The CMT electric arc additive repairing method for the aluminum bronze block part is simple to prepare, can be produced in large scale and can be widely applied to aluminum bronze repair.
Description
Technical Field
The invention belongs to the technical field of additive manufacturing, and particularly relates to a wire for CMT electric arc additive repair of an aluminum bronze block part, and a method for CMT electric arc additive repair of an aluminum bronze block part.
Background
The copper alloy has the defects of poor mechanical property, easy generation of cracks, abrasion and the like in the using process, incapability of normally using parts and serious potential safety hazard, and the replacement cost of one of the most noble metals of the copper alloy is usually very high, so that various modes such as a metal repairing agent, a plasma repairing process, a laser repairing process and the like are adopted in the engineering.
The metal repairing agent cannot achieve high bonding force and needs frequent maintenance, when copper alloy parts are repaired by laser, the repairing efficiency is low due to the reflection of the copper alloy to the laser, the electric arc additive manufacturing technology is mature, the cost is lower compared with laser cladding and plasma cladding, in addition, an additive structural member with small heat source effect can be obtained by CMT (cold metal transition technology) with small heat input, meanwhile, the high temperature enables a repairing area and an original area to form good metallurgical bonding, and compared with the traditional manual electric arc welding, the influence of the repairing copper alloy on the structure and the performance of the original parts is smaller. Therefore, the flux-cored wire for repairing the aluminum bronze block part is developed by combining the CMT arc additive technology, so that the repair of the part can be completed more efficiently and at low cost.
Disclosure of Invention
The invention aims to provide a wire for CMT arc additive repair of an aluminum bronze block part, which is specially used for repairing aluminum bronze and forming good metallurgical bonding with an original aluminum bronze part.
A second object of the invention is to provide a method for CMT arc additive repair of aluminum bronze block parts.
The first technical scheme adopted by the invention is that the wire for CMT arc additive repair of the aluminum bronze block part comprises a flux core and a welding skin, wherein the flux core comprises the following components in percentage by mass: 15-20% of nickel powder, 10-15% of aluminum powder, 1.0% of silicon powder, 5-7% of tungsten powder, 8-10% of iron powder, 10-15% of cobalt powder and lanthanum powder: 0.5-1.0%, zinc powder: 2-4 percent of copper powder as the rest, and the sum of the mass percentages of the components is 100 percent.
The present invention is also characterized in that,
the welding skin is a copper strip, is in an annealing state, has the thickness of 0.3mm and the width of 7mm; the powder coating rate of the wire (flux-cored wire) is 25-28%; the diameter of the wire (flux-cored wire) is 1.22-1.28 mm.
The second technical scheme adopted by the invention is that the method for repairing the aluminum bronze block part by the CMT arc additive comprises the following specific steps:
step 1: preparing an electric arc additive repairing aluminum bronze block part wire material: weighing the following powder in percentage by mass: 15-20% of nickel powder, 10-15% of aluminum powder, 1.0% of silicon powder, 5-7% of tungsten powder, 8-10% of iron powder, 10-15% of cobalt powder and lanthanum powder: 0.5-1.0%, zinc powder: 2-4 percent of copper powder, and the balance of copper powder, wherein the sum of the mass percentages of the components is 100 percent; the welding skin is a copper strip; preparing a flux-cored wire with the diameter of 1.22-1.28 mm by adopting a flux-cored wire drawing machine;
and 2, step: detecting the interior of the part by using ultrasonic flaw detection equipment, and determining the size and the position of a flaw;
and 3, step 3: designing a path for repairing the additive material for the patching area, wherein the design needs to be suitable for short-section multi-pass welding to reduce the influence on the original part, and excavating the area near the original crack by adopting a mechanical cutting mode;
and 4, step 4: the flux-cored wire prepared in the step 1 is loaded into a CMT material increase system, and a repairing process is completed;
and 5: performing finish machining on the part repaired in the step 5, and cutting excess height and splashing generated in the additive repair;
step 6: and carrying out heat treatment on the repaired part to eliminate the stress.
The present invention is also characterized in that,
in the step 3, the depth of the patching area is 5-10 mm below the bottom end of the crack, the length and the width of the patching area are 5-8 mm of outward extension of two sides of the crack, and the patching bottom surface needs to be a plane.
In step 4, CMT arc additive process parameters: CMT additive current: 230-240A, the width of the swing arc is 5mm, the extension length of the welding wire is 12-15 mm, and after printing of each layer is finished, surface oxide skin and slag are removed by an angle grinder; carrying out the next cladding when the temperature is cooled to the room temperature, wherein the interlayer temperature is 100-150 ℃; the protective gas is pure argon, the gas flow is 10-15L/min, and the wire filling speed is 450-500 mm/min.
In step 6, the annealing temperature is 350-400 ℃ and the time is 60-75 min.
The invention has the beneficial effects that:
(1) The invention provides a wire for repairing an aluminum bronze part by arc additive, which can also be used in other repairing fields, such as laser repairing and the like;
(2) The method has small influence on the original part and accurate repaired size.
(3) The wire provided by the method of the invention has greatly improved hardness and wear resistance after repair, and simultaneously, the microstructure distribution of the repair welding area is uniform and has no defects.
(4) The wire provided by the invention is convenient to prepare, can be produced in small batches, and can form good metallurgical bonding with original aluminum bronze parts.
Drawings
FIG. 1 is a microstructure view of a repaired area shown in example 1 of the present invention;
FIG. 2 is a macroscopic view of the repaired version of example 1 of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a wire for CMT arc additive repair of an aluminum bronze block part, which comprises a flux core and a welding skin, wherein the flux core comprises the following components in percentage by mass: 15-20% of nickel powder, 10-15% of aluminum powder, 1.0% of silicon powder, 5-7% of tungsten powder, 8-10% of iron powder, 10-15% of cobalt powder and lanthanum powder: 0.5-1.0%, zinc powder: 2-4 percent of copper powder as the rest, and the sum of the mass percentages of the components is 100 percent.
Wherein the welding skin is a copper strip, is in an annealing state, has the thickness of 0.3mm and the width of 7mm; the powder coating rate of the wire (flux-cored wire) is 25-28%; the diameter of the wire (flux-cored wire) is 1.22-1.28 mm.
The function and effect of each drug core powder are as follows:
the nickel and the copper have the same crystal structure, and the copper and the nickel can be dissolved in each other infinitely, so that the metallurgical bonding with the original block part is facilitated, the mechanical property of a repair welding interface is improved, and meanwhile, certain toughness can be increased so as to relieve the residual stress after repair welding;
aluminum powder is matched with components such as an original aluminum bronze block body, dilution on an original base material is reduced, and therefore the performance of a repair welding heat affected zone is reduced, and meanwhile, the corrosion resistance and the strength of the copper alloy can be improved due to the addition of the aluminum element;
the silicon powder plays a role in deoxidation in order to protect a molten pool;
tungsten is used as a high-melting-point element, the wear resistance of the copper alloy can be improved, the repair welding area is used as a discontinuous area, cracks are more easily generated again, and the wear loss of the copper alloy can be effectively reduced by proper amount of tungsten;
iron powder is dissolved in nickel in a solid solution manner to form solid solution strengthening, so that the surface hardness is improved;
the cobalt can play a strengthening role in the copper alloy, can inhibit the problem of grain growth during heat treatment, and corresponds to the post-welding heat treatment process at the later stage;
the hardness of the alloy can be obviously improved by adding the rare earth elements;
the zinc powder can improve the fluidity of the melted wire and ensure the uniform tissue of the repair welding area;
the invention also provides a method for repairing the aluminum bronze block part by the CMT arc additive, which comprises the following specific steps:
step 1: preparing an electric arc additive repairing aluminum bronze block part wire material: weighing the following powder in percentage by mass: 15-20% of nickel powder, 10-15% of aluminum powder, 1.0% of silicon powder, 5-7% of tungsten powder, 8-10% of iron powder, 10-15% of cobalt powder and lanthanum powder: 0.5-1.0%, zinc powder: 2-4% of copper powder, and the balance of copper powder, wherein the sum of the mass percentages of the components is 100%; the welding skin is a copper strip; preparing a flux-cored wire with the diameter of 1.22-1.28 mm by adopting a flux-cored wire drawing machine;
and 2, step: detecting the interior of the part by using ultrasonic flaw detection equipment, and determining the size and the position of a flaw;
and 3, step 3: designing a path for repairing the additive material for the patching area, wherein the design needs to be suitable for short-section multi-pass welding to reduce the influence on the original part, and excavating the area near the original crack by adopting a mechanical cutting mode;
in the step 3, the depth of the patching area is 5-10 mm below the bottom end of the crack, the length and the width of the patching area are 5-8 mm of outward extension of two sides of the crack, and the patching bottom surface needs to be a plane.
And 4, step 4: filling the flux-cored wire prepared in the step 1 into a CMT material increasing system to finish a repairing process;
in step 4, CMT arc additive process parameters: CMT additive current: 230-240A, the swing arc width is 5mm, the extension length of the welding wire is 12-15 mm, and after printing of each layer is finished, a surface oxide skin and slag are removed by an angle grinder; carrying out next cladding when the temperature is cooled to room temperature, wherein the interlayer temperature is 100-150 ℃; the protective gas is pure argon, the gas flow is 10-15L/min, and the wire filling speed is 450-500 mm/min.
And 5: performing finish machining on the part repaired in the step 5, and cutting surplus height and splashing generated in the material increase repair;
step 6: and carrying out heat treatment on the repaired part to eliminate the stress.
In step 6, the annealing temperature is 350-400 ℃, and the time is 60-75 min.
Example 1
The method for repairing the aluminum bronze block part by the CMT arc additive comprises the following specific steps:
step 1: preparing an electric arc additive repairing aluminum bronze block part wire material: weighing the following powder in percentage by mass: 20% of nickel powder, 15% of aluminum powder, 1.0% of silicon powder, 7% of tungsten powder, 10% of iron powder, 15% of cobalt powder and 15% of lanthanum powder: 1.0%, zinc powder: 4%, copper powder: 27 percent; preparing a flux-cored wire with the diameter of 1.22mm by adopting a flux-cored wire drawing machine;
step 2: detecting the interior of the part by using ultrasonic flaw detection equipment, and determining the size and the position of a flaw;
and 3, step 3: designing a path for repairing the additive for the patching area, and excavating the area near the original crack by adopting a mechanical cutting mode, wherein the depth of the patching area is 5-10 mm below the bottom end of the crack, the length and the width of the patching area are 5-8 mm of outward extension of two sides of the crack, and the patching bottom surface needs to be a plane;
and 4, step 4: and (2) loading the flux-cored wire prepared in the step (1) into a CMT additive system to finish a repair process, wherein the CMT arc additive process parameters are as follows: CMT additive current: 230-240A, the swing arc width is 5mm, the extension length of the welding wire is 12mm, and after printing of each layer is finished, the surface oxide skin and slag are removed by an angle grinder; carrying out next cladding when the temperature is cooled to room temperature, wherein the interlayer temperature is 100 ℃; the protective gas is pure argon, the gas flow is 10L/min, and the wire filling speed is 450mm/min;
and 5: performing finish machining on the part repaired in the step 5, and cutting excess height and splashing generated in the additive repair;
step 6: and carrying out heat treatment on the repaired part to eliminate stress, wherein the annealing temperature is 350 ℃ and the annealing time is 60min.
Example 1 a repaired block aluminum bronze part based on CMT arc additive manufacturing is obtained, the appearance of the repaired block aluminum bronze part is shown in figure 2, and the wire can form good metallurgical bonding with the original aluminum bronze part; after microscopic structure observation, the repaired area has uniform microscopic structure and no defects such as cracks and pores, and the average microhardness is 185HV 0.1 。
Example 2
The method for repairing the aluminum bronze block part by the CMT arc additive comprises the following specific steps:
step 1: preparing an electric arc additive repairing aluminum bronze block part wire material: weighing the following powder in percentage by mass: 15% of nickel powder, 10% of aluminum powder, 1.0% of silicon powder, 7% of tungsten powder, 10% of iron powder, 15% of cobalt powder and lanthanum powder: 0.5%, zinc powder: 4%, copper powder: 37.5 percent; preparing a flux-cored wire with the diameter of 1.28mm by adopting a flux-cored wire drawing machine;
step 2: detecting the interior of the part by using ultrasonic flaw detection equipment, and determining the size and the position of a flaw;
and step 3: designing a path for repairing the additive for the patching area, and excavating the area near the original crack by adopting a mechanical cutting mode, wherein the depth of the patching area is 10mm below the bottom end of the crack, the length and the width of the patching area are 8mm of outward extension of two sides of the crack, and the patching bottom surface needs to be a plane;
and 4, step 4: and (3) loading the flux-cored wire prepared in the step (1) into a CMT additive system to finish a repair process, wherein the CMT arc additive process parameters are as follows: CMT additive current: 230-240A, the swing arc width is 5mm, the extension length of the welding wire is 15mm, and after printing of each layer is finished, the surface oxide skin and slag are removed by an angle grinder; carrying out the next cladding when the temperature is cooled to the room temperature, wherein the interlayer temperature is 150 ℃; the protective gas is pure argon, the gas flow is 15L/min, and the wire filling speed is 500mm/min;
and 5: performing finish machining on the part repaired in the step 5, and cutting surplus height and splashing generated in the material increase repair;
and 6: and carrying out heat treatment on the repaired part to eliminate stress, wherein the annealing temperature is 400 ℃ and the annealing time is 75min.
In the embodiment 2, the repaired block aluminum bronze part manufactured and repaired based on CMT electric arc additive is obtained, after microscopic structure observation, the repaired area has uniform microscopic structure and does not have the defects of cracks, pores and the like, and the average microhardness is 180HV 0.1 。
Example 3
The method for repairing the aluminum bronze block part by the CMT arc additive comprises the following specific steps:
step 1: preparing an electric arc additive repairing aluminum bronze block part wire material: weighing the following powder in percentage by mass: 15% of nickel powder, 15% of aluminum powder, 1.0% of silicon powder, 5% of tungsten powder, 10% of iron powder, 10% of cobalt powder and 10% of lanthanum powder: 1%, zinc powder: 4%, copper powder: 39 percent; preparing a flux-cored wire with the diameter of 1.22-1.28 mm by adopting a flux-cored wire drawing machine;
step 2: detecting the interior of the part by using ultrasonic flaw detection equipment, and determining the size and the position of a flaw;
and step 3: designing a path for repairing the additive for the patching area, and excavating the area near the original crack by adopting a mechanical cutting mode, wherein the depth of the patching area is 8mm below the bottom end of the crack, the length and the width of the patching area are 6mm of outward extension of two sides of the crack, and the patching bottom surface needs to be a plane;
and 4, step 4: and (3) loading the flux-cored wire prepared in the step (1) into a CMT additive system to finish a repair process, wherein the CMT arc additive process parameters are as follows: CMT additive current: 230-240A, the width of the swing arc is 5mm, the extension length of the welding wire is 14mm, and after printing of each layer is finished, surface oxide skin and slag are removed by an angle grinder; carrying out next cladding when the temperature is cooled to room temperature, wherein the interlayer temperature is 120 ℃; the protective gas is pure argon, the gas flow is 12L/min, and the wire filling speed is 480mm/min;
and 5: performing finish machining on the part repaired in the step 5, and cutting excess height and splashing generated in the additive repair;
step 6: and carrying out heat treatment on the repaired part to eliminate stress, wherein the annealing temperature is 380 ℃ and the time is 70min.
In example 3, after the repaired block aluminum bronze part manufactured based on CMT arc additive manufacturing is observed by a microstructure, the microstructure of a repaired area is uniform, the defects such as cracks and air holes are not generated, and the average microhardness is 182.4HV 0.1 。
Example 4
The method for repairing the aluminum bronze block part by the CMT arc additive comprises the following specific steps:
step 1: preparing an electric arc additive repairing aluminum bronze block part wire material: weighing the following powder in percentage by mass: 15% of nickel powder, 15% of aluminum powder, 1.0% of silicon powder, 5% of tungsten powder, 10% of iron powder, 10% of cobalt powder and 10% of lanthanum powder: 1%, zinc powder: 4%, copper powder: 39 percent; preparing a flux-cored wire with the diameter of 1.25mm by adopting a flux-cored wire drawing machine;
step 2: detecting the interior of the part by using ultrasonic flaw detection equipment, and determining the size and the position of a flaw;
and step 3: designing a path for repairing the additive for the patching area, and excavating the area near the original crack by adopting a mechanical cutting mode, wherein the depth of the patching area is 7mm below the bottom end of the crack, the length and the width of the patching area are 7mm of the outward extension of two sides of the crack, and the patching bottom surface needs to be a plane;
and 4, step 4: and (2) loading the flux-cored wire prepared in the step (1) into a CMT additive system to finish a repair process, wherein the CMT arc additive process parameters are as follows: CMT additive current: 230-240A, the swing arc width is 5mm, the extension length of the welding wire is 12mm, and after printing of each layer is finished, the surface oxide skin and slag are removed by an angle grinder; carrying out the next cladding when the temperature is cooled to the room temperature, wherein the interlayer temperature is 150 ℃; the protective gas is pure argon, the gas flow is 10L/min, and the wire filling speed is 450mm/min;
and 5: performing finish machining on the part repaired in the step 5, and cutting excess height and splashing generated in the additive repair;
step 6: and carrying out heat treatment on the repaired part to eliminate stress, wherein the annealing temperature is 350 ℃, and the annealing time is 65min.
Example 4 a repaired block aluminum bronze part was obtained based on CMT arc additive manufacturing, and after microscopic structure observation, the repaired area had a uniform microstructure, no defects such as cracks and pores occurred, and an average microhardness of 183HV 0.1 。
Example 5
The method for repairing the aluminum bronze block part by the CMT arc additive comprises the following specific steps:
step 1: preparing an electric arc additive repairing aluminum bronze block part wire material: weighing the following powder according to mass percent: 15% of nickel powder, 15% of aluminum powder, 1.0% of silicon powder, 5% of tungsten powder, 10% of iron powder, 10% of cobalt powder and 10% of lanthanum powder: 1%, zinc powder: 4%, copper powder: 39 percent; preparing a flux-cored wire with the diameter of 1.22mm by adopting a flux-cored wire drawing machine;
and 2, step: detecting the interior of the part by using ultrasonic flaw detection equipment, and determining the size and the position of a flaw;
and 3, step 3: designing a path for repairing the additive for the patching area, and excavating the area near the original crack by adopting a mechanical cutting mode, wherein the depth of the patching area is 8mm below the bottom end of the crack, the length and the width of the patching area are 8mm of the outward extension of two sides of the crack, and the patching bottom surface needs to be a plane;
and 4, step 4: and (2) loading the flux-cored wire prepared in the step (1) into a CMT additive system to finish a repair process, wherein the CMT arc additive process parameters are as follows: CMT additive current: 230-240A, the swing arc width is 5mm, the extension length of the welding wire is 12mm, and after printing of each layer is finished, the surface oxide skin and slag are removed by an angle grinder; carrying out next cladding when the temperature is cooled to room temperature, wherein the interlayer temperature is 110 ℃; the protective gas is pure argon, the gas flow is 12L/min, and the wire filling speed is 450mm/min;
and 5: performing finish machining on the part repaired in the step 5, and cutting surplus height and splashing generated in the material increase repair;
and 6: and carrying out heat treatment on the repaired part to eliminate stress, wherein the annealing temperature is 350-400 ℃, and the annealing time is 60-75 min.
Example 5 a repaired block aluminum bronze part was obtained based on CMT arc additive manufacturing, and after microscopic structure observation, the repaired area had a uniform microstructure, no defects such as cracks and pores occurred, and an average microhardness of 183.1HV 0.1 。
Claims (6)
- The wire for CMT arc additive repair of the aluminum bronze block part is characterized by comprising a flux core and a welding skin, wherein the flux core comprises the following components in percentage by mass: 15-20% of nickel powder, 10-15% of aluminum powder, 1.0% of silicon powder, 5-7% of tungsten powder, 8-10% of iron powder, 10-15% of cobalt powder and lanthanum powder: 0.5-1.0%, zinc powder: 2-4 percent of copper powder as the rest, and the sum of the mass percentages of the components is 100 percent.
- 2. The wire for CMT arc additive repair of an aluminum bronze block part according to claim 1, wherein the skin is a copper strip, in an annealed state, having a thickness of 0.3mm and a width of 7mm; the powder coating rate of the wire is 25-28%; the diameter of the wire is 1.22-1.28 mm.
- The CMT arc additive repairing method for the aluminum bronze block part is characterized by comprising the following specific steps of:step 1: preparing an electric arc additive repairing aluminum bronze block part wire material: weighing the following powder according to mass percent: 15-20% of nickel powder, 10-15% of aluminum powder, 1.0% of silicon powder, 5-7% of tungsten powder, 8-10% of iron powder, 10-15% of cobalt powder and lanthanum powder: 0.5-1.0%, zinc powder: 2-4 percent of copper powder, and the balance of copper powder, wherein the sum of the mass percentages of the components is 100 percent; the welding skin is a copper strip; preparing a flux-cored wire with the diameter of 1.22-1.28 mm by adopting a flux-cored wire drawing machine;and 2, step: detecting the interior of the part by using ultrasonic flaw detection equipment, and determining the size and the position of a flaw;and step 3: designing a repair additive path for the patching area, and excavating the area near the original crack by adopting a mechanical cutting mode;and 4, step 4: the flux-cored wire prepared in the step 1 is loaded into a CMT material increase system, and a repairing process is completed;and 5: performing finish machining on the part repaired in the step 5, and cutting surplus height and splashing generated in the material increase repair;and 6: and carrying out heat treatment on the repaired part to eliminate the stress.
- 4. The CMT arc additive repair method of aluminum bronze block parts according to claim 3, wherein in step 3, the depth of the patching region is 5-10 mm below the bottom end of the crack, the length and width of the patching region are 5-8 mm of the outward extension of two sides of the crack, and the patching bottom surface needs to be a plane.
- 5. The CMT arc additive repair method of an aluminum bronze block part according to claim 3, wherein in step 4, the CMT arc additive process parameters are: CMT additive current: 230-240A, the swing arc width is 5mm, the extension length of the welding wire is 12-15 mm, and after printing of each layer is finished, a surface oxide skin and slag are removed by an angle grinder; carrying out next cladding when the temperature is cooled to room temperature, wherein the interlayer temperature is 100-150 ℃; the protective gas is pure argon, the gas flow is 10-15L/min, and the wire filling speed is 450-500 mm/min.
- 6. The CMT arc additive repair method of aluminum bronze block parts according to claim 3, wherein in step 6, the annealing temperature is 350 to 400 ℃ for 60 to 75min.
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