CN112475300A - Jet flow additive repairing process method for aluminum alloy base material - Google Patents
Jet flow additive repairing process method for aluminum alloy base material Download PDFInfo
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- CN112475300A CN112475300A CN202011334169.2A CN202011334169A CN112475300A CN 112475300 A CN112475300 A CN 112475300A CN 202011334169 A CN202011334169 A CN 202011334169A CN 112475300 A CN112475300 A CN 112475300A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
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- 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
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- 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
- B33Y70/00—Materials specially adapted for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
- B22F2007/068—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts repairing articles
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- 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 application belongs to the field of additive repair, and particularly relates to a jet flow additive repair process method for an aluminum alloy base material. The method comprises the following steps: the method comprises the following steps of firstly, obtaining technological parameters for additive repair of the aluminum alloy base material member, wherein the technological parameters comprise: dragging gas and dragging gas pressure, additive powder type, powder particle size and particle temperature; secondly, constructing a parameter process window for additive repair based on the process parameters; and thirdly, placing the aluminum alloy base material component in a jet flow additive repairing device, and performing jet flow additive repairing on the aluminum alloy base material part according to the parameter process window. The jet flow additive repair process method for the aluminum alloy base material can obtain a high and stable additive repair effect, and meets the high-speed jet flow additive repair requirement.
Description
Technical Field
The application belongs to the field of additive repair, and particularly relates to a jet flow additive repair process method for an aluminum alloy base material.
Background
The main bearing component of the airplane body is easy to generate fatigue cracks due to large bearing load, and the flight safety is directly endangered once the main bearing component is damaged. The member has a complex structure, a narrow construction passage and is often in a fuel environment, and the limitation on the repair means of cracks is severe. The traditional bolt connection reinforcement and glue joint reinforcement repair modes and emerging 3D printing and friction stir welding which belong to additive manufacturing are not enough. Therefore, a repairing method based on high-speed jet flow additive is provided, the method is based on the technical principle of jet flow, high-speed particle jet flow is formed by driving particles through high-pressure gas, the particles collide with a component to be repaired to generate severe plastic deformation, and a deposition layer (additive layer) is formed on the surface of the component to be repaired.
In the repair method based on high-speed jet flow additive, the quality of additive repair can be directly influenced by small changes of process parameters, and how to improve the quality of additive repair is a difficult problem.
Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The application aims to provide a jet flow additive repair process method for an aluminum alloy base material, and aims to solve at least one problem in the prior art.
The technical scheme of the application is as follows:
a jet flow additive repair process method for an aluminum alloy base material comprises the following steps:
the method comprises the following steps of firstly, obtaining technological parameters for additive repair of the aluminum alloy base material member, wherein the technological parameters comprise: dragging gas and dragging gas pressure, additive powder type, powder particle size and particle temperature;
secondly, constructing a parameter process window for additive repair based on the process parameters;
and thirdly, placing the aluminum alloy base material component in a jet flow additive repairing device, and performing jet flow additive repairing on the aluminum alloy base material part according to the parameter process window.
Optionally, the parametric process window comprises:
when the additive repairs the aluminum alloy main bearing component,
the dragging gas is helium with the concentration of more than 99.99 percent;
the pressure range of the towing gas is 5.0-7.0 Mpa;
the additive powder is 7075 powder or 5056 powder;
the particle size of the powder is that D10 is not more than 10 mu m, D50 is 20-30 mu m, D90 is not more than 60 mu m, and the powder is in normal distribution;
the temperature range of the particles is 200-400 ℃;
when the additive repairs the secondary bearing member of the aluminum alloy,
the dragging gas is a mixed gas of helium and nitrogen, and the mixing ratio is 70-80% of helium and 30-20% of nitrogen;
the pressure range of the towing gas is 3.5-5.0 MPa;
the additive powder is powder 6061 or powder 2024;
the particle size of the powder is that D10 is not more than 10 mu m, D50 is 20-30 mu m, D90 is not more than 60 mu m, and the powder is in normal distribution;
the temperature range of the particles is 200-400 ℃;
wherein the content of the first and second substances,
d10 is the particle size with a cumulative particle distribution of 10%, i.e. the volume content of particles smaller than this is 10% of the total particles;
d50 is the particle size with a cumulative particle distribution of 50%, i.e. the volume content of particles smaller than this particle size is 50% of the total particles;
d90 is the particle size with a cumulative particle distribution of 90%, i.e. the volume fraction of particles smaller than this is 90% of the total particles.
Optionally, the process parameters further include a powder shape, wherein,
when the additive is used for repairing the aluminum alloy main bearing member, the powder is spherical or the content of an approximate sphere with the aspect ratio not more than 2 is not less than 97%;
when the additive is used for repairing the aluminum alloy secondary bearing member, the powder is spherical or the content of the approximate sphere with the aspect ratio not more than 2 is not less than 97%.
Optionally, the process parameters further include powder hardness, wherein,
when the additive repairs the aluminum alloy main bearing member, the hardness difference of the powder is not more than 10%;
when the additive is used for repairing the aluminum alloy secondary bearing member, the powder hardness difference is not more than 10%.
Optionally, the jet flow additive repair device includes:
the top of the working box is provided with an inlet, the side wall of the working box is provided with an air suction hole and an air inlet hole, and the air suction hole is connected with an air exhaust device;
the fixing table is arranged in the working box and used for fixing the aluminum alloy base material member to be repaired by additive;
and the spray gun extends into the working box from a top inlet, and the spray gun head corresponds to a to-be-added material repairing area of the aluminum alloy base material component.
Alternatively, the suction holes are arranged on a rear side wall plate of the work box, and the intake holes are arranged on both left and right side wall plates of the work box.
Optionally, the suction hole is connected with a dust collecting device.
Optionally, the front side wall plate of the work box is made of a transparent material.
The invention has at least the following beneficial technical effects:
the jet flow additive repair process method for the aluminum alloy base material can obtain a high and stable additive repair effect, and meets the high-speed jet flow additive repair requirement.
Drawings
FIG. 1 is a flow chart of a jet additive repair process for an aluminum alloy substrate according to one embodiment of the present disclosure;
FIG. 2 is a schematic view of a parametric process window of a jet additive repair process method for an aluminum alloy substrate according to an embodiment of the present application;
FIG. 3 is a schematic view of a jet additive repair apparatus for a jet additive repair process method for an aluminum alloy substrate according to an embodiment of the present application.
Wherein:
1-an aluminum alloy substrate member; 2-a spray gun; 3-a suction hole; 4-air inlet hole.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.
The present application is described in further detail below with reference to fig. 1 to 3.
The application provides a jet flow additive repair process method for an aluminum alloy base material, which comprises the following steps:
the method comprises the following steps of firstly, acquiring technological parameters for additive repair of an aluminum alloy base material member, wherein the process for high-speed jet additive repair of the aluminum alloy base material is mainly limited by the pressure of dragging gas and the dragging gas, the type of additive powder, the particle size of the powder, the particle temperature and other conditions;
secondly, constructing a parameter process window for additive repair based on process parameters;
and thirdly, placing the aluminum alloy base material component in a jet flow additive repairing device, and performing jet flow additive repairing on the aluminum alloy base material part according to the process window.
In one embodiment of the present application, a graphical representation of the relationship between the various process parameters is provided through experimentation, as shown in FIG. 2.
(1) Drag gas
When the material is added to repair the main bearing member of the aluminum alloy, helium with the purity of more than 99.99 percent is selected;
when the material is added to repair the aluminum alloy secondary bearing member, helium and nitrogen mixed gas can be selected, wherein the mixing ratio is 70-80% of helium and 30-20% of nitrogen.
(2) Pressure of towing gas
A sufficiently high drag gas pressure is a prerequisite for particle acceleration;
when the additive repairs the aluminum alloy main bearing member, the pressure range of the towing gas is 5.0-7.0 MPa;
when the additive repairs the aluminum alloy secondary bearing member, the pressure range of the towing gas is 3.5-5.0 MPa.
(3) Selection of additive powder type
Powder type: common powder for high-speed jet flow additive repair of the aluminum alloy base material comprises powder 6061, powder 2024, powder 7075, powder 5056 and the like. And determining the type of the additive powder according to the material characteristics of a product to be repaired, wherein the powder 7075 and the powder 5056 can be used for an aluminum alloy main bearing component, and the powder 6061 and the powder 2024 can be used for an aluminum alloy secondary bearing component.
(4) Particle size of the powder
Powder particle size: under the same process parameters, the particle impact rate is inversely proportional to the powder particle size, and the powder particle size distribution is characterized by three indexes of D10, D50 and D90, wherein,
d10 represents a particle size with a cumulative particle distribution of 10%, i.e. the volume fraction of particles smaller than this is 10% of the total particles;
d50 denotes the particle size with a cumulative particle distribution of 50%, also known as the median particle size, i.e. the volume fraction of particles smaller than this accounts for 50% of the total particles;
d90 represents a particle size with a cumulative particle distribution of 90%, i.e. the volume fraction of particles smaller than this is 90% of the total particles;
when the additive repairs the aluminum alloy main bearing member and the additive repairs the aluminum alloy secondary bearing member, the particle size distribution of powder suitable for high-speed jet additive repair can be that D10 is not more than 10 microns, D50 is 20-30 microns, D90 is not more than 60 microns, and the powder is in normal distribution.
In the present embodiment, the first and second electrodes are,
the shape of the powder for high-speed jet additive repair is spherical or approximately spherical with the aspect ratio not more than 2, and the content is not less than 97%;
the microhardness of the powder is a measure, and to reduce process dispersion, the powder hardness should not differ by more than 10% from batch to batch.
(5) Temperature of the particles
Proper temperature is helpful for softening particles and improving the impact speed of the particles, but the high-temperature resistance of the aluminum alloy substrate is poor, and the excessive temperature rise can cause annealing of the aluminum alloy substrate, thereby damaging the original strength performance of the substrate and losing the significance of additive repair. When the material is added to repair the aluminum alloy main bearing member and the aluminum alloy secondary bearing member, powder suitable for high-speed jet flow material adding repair is heated and controlled to be 200-400 ℃.
In an embodiment of the application, a jet flow additive repairing device is provided, and comprises a working box, a fixing table and a spray gun 2, as shown in fig. 3.
Specifically, the top of the working box is provided with an inlet, the side wall of the working box is provided with an air suction hole 3 and an air inlet hole 4, and the air suction hole 3 is connected with an air extraction device; the fixing table is arranged in the work box and used for fixing the aluminum alloy base material member 1 to be repaired by additive; the spray gun 2 extends into the working box from a top inlet, the spray gun head corresponds to a to-be-additively repaired area of the aluminum alloy base material component, and the spray gun 2 conducts jet flow additive repair on the aluminum alloy base material component according to the parameter process window.
Advantageously, in this embodiment, the air suction holes 3 are arranged on the rear side wall plate of the working box, for example, four air suction holes are arranged in fig. 3, the rear portion of the air suction holes 3 is connected with an air suction device, and a dust collecting device is further arranged, and the air suction holes 3 may further be provided with a cover plate for dispersing air flow to prevent interference with the flow direction and speed of the high-speed particle jet. The air inlet holes 4 are arranged at the lower parts of the left and right side wall plates of the work box, and are provided with four air inlet holes as shown in figure 3, and are matched with the air suction holes 3 to ensure the air circulation in the work box. The work box can play simultaneously and prevent the dust diffusion, avoids environmental pollution's effect, and the front side wall plate of work box is transparent material, is convenient for observe the restoration working conditions.
In one embodiment of the present application, a method for repairing a 7000 series aluminum alloy structural member by using high-speed jet additive comprises the following steps:
acquiring technological parameters for additive repair of the aluminum alloy base material member;
the following parametric process windows were constructed: helium with the purity of 99.999% is used as the dragging gas; setting the pressure of the towing gas to be 6.2 MPa; the additive powder is 7075 aluminum alloy powder; the particle size distribution of the powder is as follows: d10 is 7 μm, D50 is 25 μm, D90 is 55 μm; the powder shape is spherical or approximately spherical with the aspect ratio not more than 2, and the powder content of the shape is 98.5%; the micro-hardness of the powder is 1.5 GPa; the particle temperature was set at 400 ℃.
By using a certain type of jet flow additive repair device and performing additive repair on the aluminum alloy base material member based on the above process parameter settings, the additive repair layer with the porosity lower than 1%, the tensile strength up to 325MPa and the Vickers hardness up to 145 can be prepared.
The jet flow additive repair process method for the aluminum alloy base material can obtain a high and stable additive repair effect, meets the high-speed jet flow additive repair requirement, and improves the operation efficiency.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A jet flow additive repair process method for an aluminum alloy base material is characterized by comprising the following steps:
the method comprises the following steps of firstly, obtaining technological parameters for additive repair of the aluminum alloy base material member, wherein the technological parameters comprise: dragging gas and dragging gas pressure, additive powder type, powder particle size and particle temperature;
secondly, constructing a parameter process window for additive repair based on the process parameters;
and thirdly, placing the aluminum alloy base material component in a jet flow additive repairing device, and performing jet flow additive repairing on the aluminum alloy base material part according to the parameter process window.
2. The jet flow additive restoration process method for the aluminum alloy substrate according to claim 1, wherein the parameter process window comprises:
when the additive repairs the aluminum alloy main bearing component,
the dragging gas is helium with the concentration of more than 99.99 percent;
the pressure range of the towing gas is 5.0-7.0 Mpa;
the additive powder is 7075 powder or 5056 powder;
the particle size of the powder is that D10 is not more than 10 mu m, D50 is 20-30 mu m, D90 is not more than 60 mu m, and the powder is in normal distribution;
the temperature range of the particles is 200-400 ℃;
when the additive repairs the secondary bearing member of the aluminum alloy,
the dragging gas is a mixed gas of helium and nitrogen, and the mixing ratio is 70-80% of helium and 30-20% of nitrogen;
the pressure range of the towing gas is 3.5-5.0 MPa;
the additive powder is powder 6061 or powder 2024;
the particle size of the powder is that D10 is not more than 10 mu m, D50 is 20-30 mu m, D90 is not more than 60 mu m, and the powder is in normal distribution;
the temperature range of the particles is 200-400 ℃;
wherein the content of the first and second substances,
d10 is the particle size with a cumulative particle distribution of 10%, i.e. the volume content of particles smaller than this is 10% of the total particles;
d50 is the particle size with a cumulative particle distribution of 50%, i.e. the volume content of particles smaller than this particle size is 50% of the total particles;
d90 is the particle size with a cumulative particle distribution of 90%, i.e. the volume fraction of particles smaller than this is 90% of the total particles.
3. The jet additive repair process method for an aluminum alloy substrate according to claim 2, wherein the process parameters further include a powder shape, wherein,
when the additive is used for repairing the aluminum alloy main bearing member, the powder is spherical or the content of an approximate sphere with the aspect ratio not more than 2 is not less than 97%;
when the additive is used for repairing the aluminum alloy secondary bearing member, the powder is spherical or the content of the approximate sphere with the aspect ratio not more than 2 is not less than 97%.
4. The jet additive restoration process method for an aluminum alloy substrate according to claim 3, wherein the process parameters further include powder hardness, wherein,
when the additive repairs the aluminum alloy main bearing member, the hardness difference of the powder is not more than 10%;
when the additive is used for repairing the aluminum alloy secondary bearing member, the powder hardness difference is not more than 10%.
5. The jet flow additive repair process method for the aluminum alloy base material according to claim 1, wherein the jet flow additive repair device comprises:
the top of the working box is provided with an inlet, the side wall of the working box is provided with an air suction hole (3) and an air inlet hole (4), and the air suction hole (3) is connected with an air suction device;
the fixing table is arranged in the working box and used for fixing the aluminum alloy base material component (1) to be repaired by the additive;
and the spray gun (2) extends into the working box from a top inlet, and the spray gun head corresponds to the area to be repaired by additive of the aluminum alloy base material component.
6. The jet flow additive repair process method for the aluminum alloy base material according to claim 5, wherein the air suction holes (3) are formed in a rear side wall plate of the working box, and the air inlet holes (4) are formed in left and right side wall plates of the working box.
7. The jet flow additive restoration process method for the aluminum alloy base material according to claim 6, wherein the air suction holes (3) are connected with a dust collection device.
8. The jet flow additive repair process method for the aluminum alloy base material according to claim 7, wherein a front side wall plate of the working box is made of a transparent material.
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