CN112475300B - 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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- CN112475300B CN112475300B CN202011334169.2A CN202011334169A CN112475300B CN 112475300 B CN112475300 B CN 112475300B CN 202011334169 A CN202011334169 A CN 202011334169A CN 112475300 B CN112475300 B CN 112475300B
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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
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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 substrate. Comprising the following steps: step one, obtaining technological parameters for performing additive repair on an aluminum alloy substrate member, wherein the technological parameters comprise: drag gas and drag gas pressure, additive powder type, powder particle size, particle temperature; step two, constructing a parameter process window for additive repair based on the process parameters; and thirdly, placing the aluminum alloy substrate component in a jet flow additive repairing device, and repairing the aluminum alloy substrate part by the jet flow additive according to the parameter process window. According to the jet flow additive repairing process method for the aluminum alloy substrate, a high and stable additive repairing effect can be obtained, and the high-speed jet flow additive repairing requirement is met.
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 substrate.
Background
The main bearing member of the aircraft body is easy to generate fatigue cracks due to large bearing load, and once damaged, the main bearing member directly endangers the flight safety. The components have complex structure and narrow construction passage, are always in a fuel environment, and have severe limitation on repairing means of cracks. The traditional bolt connection reinforcement and glue joint reinforcement repair mode are difficult to be qualified by the emerging 3D printing and friction stir welding of the same additive manufacturing. The repairing method is based on the jet technology principle, particles are driven by high-pressure gas to form high-speed particle jet, the high-speed particle jet collides with a member to be repaired to generate severe plastic deformation, and a deposition layer (additive layer) is formed on the surface of the member to be repaired.
In the repairing method based on high-speed jet material increase, the quality of the material increase repair is directly affected by small changes of process parameters, and how to improve the quality of the material increase repair is a great difficulty.
It is therefore desirable to have a solution that overcomes or at least alleviates at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The purpose of the application is to provide a jet flow additive repairing process method for an aluminum alloy substrate, so as to solve at least one problem existing in the prior art.
The technical scheme of the application is as follows:
a fluidic additive repair process for an aluminum alloy substrate, comprising:
step one, obtaining technological parameters for performing additive repair on an aluminum alloy substrate member, wherein the technological parameters comprise: drag gas and drag gas pressure, additive powder type, powder particle size, particle temperature;
step two, constructing a parameter process window for additive repair based on the process parameters;
and thirdly, placing the aluminum alloy substrate component in a jet flow additive repairing device, and repairing the aluminum alloy substrate part by the jet flow additive according to the parameter process window.
Optionally, the parameter process window includes:
when the additive repairs the aluminum alloy main bearing component,
the dragging gas is helium with the concentration of more than 99.99%;
the pressure range of the dragging gas is 5.0-7.0 Mpa;
the additive powder is powder 7075 or powder 5056;
the grain diameter of the powder is D10 not more than 10 mu m, D50 is 20-30 mu m, D90 is not more than 60 mu m, and the powder is normally distributed;
the temperature range of the particles is 200-400 ℃;
when the aluminum alloy secondary bearing member is repaired by the additive,
the dragging gas is helium and nitrogen mixed gas, and the mixing ratio is 70-80% helium and 30-20% nitrogen;
the pressure range of the dragging gas is 3.5-5.0 MPa;
the additive powder is of the type powder 6061 or powder 2024;
the grain diameter of the powder is D10 not more than 10 mu m, D50 is 20-30 mu m, D90 is not more than 60 mu m, and the powder is normally distributed;
the temperature range of the particles is 200-400 ℃;
wherein, the liquid crystal display device comprises a liquid crystal display device,
d10 is the particle diameter of which the cumulative distribution of particles is 10%, that is, the volume content of particles smaller than this particle diameter accounts for 10% of the total particles;
d50 is the particle diameter at which the cumulative distribution of particles is 50%, i.e., the volume content of particles smaller than this particle diameter is 50% of the total particles;
d90 is the particle diameter at which the cumulative distribution of particles is 90%, i.e., the volume content of particles smaller than this particle diameter is 90% of the total particles.
Optionally, the process parameters further comprise a powder shape, wherein,
when the additive repairs the aluminum alloy main bearing component, the powder is spherical or has the approximately spherical content with the aspect ratio not more than 2 not less than 97%;
when the additive repairs the aluminum alloy secondary bearing member, the powder is spherical or has the approximately spherical content with the aspect ratio not more than 2 not less than 97%.
Optionally, the process parameters further comprise powder hardness, wherein,
when the aluminum alloy main bearing component is repaired by the additive, the difference of the hardness of the powder is not more than 10%;
when the additive repairs the aluminum alloy secondary bearing member, the difference of the hardness of the powder is not more than 10%.
Optionally, the jet additive repairing device includes:
the working box is characterized in that an inlet is formed in the top of the working box, an air suction hole and an air inlet hole are formed in the side wall of the working box, and the air suction hole is connected with the air suction device;
the fixing table is arranged in the working box and used for fixing an aluminum alloy substrate member to be subjected to additive repair;
the spray gun stretches into the working box from the top inlet, and the spray gun head corresponds to the to-be-added material repairing area of the aluminum alloy substrate component.
Optionally, the air suction holes are arranged on a rear side wall plate of the working box, and the air inlet holes are arranged on left and right side wall plates of the working box.
Optionally, the air suction hole is connected with a dust collecting device.
Optionally, the front side wall plate of the working box is made of transparent materials.
The invention has at least the following beneficial technical effects:
according to the jet flow additive repairing process method for the aluminum alloy substrate, a high and stable additive repairing effect can be obtained, and the high-speed jet flow additive repairing requirement is met.
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 application;
FIG. 2 is a schematic view of a parametric process window of a fluidic additive repair process for an aluminum alloy substrate according to one embodiment of the present application;
fig. 3 is a schematic view of a jet flow additive repair device for a jet flow additive repair process method for an aluminum alloy substrate according to one embodiment of the present application.
Wherein:
1-an aluminum alloy base material member; 2-a spray gun; 3-an air suction hole; 4-an air inlet hole.
Detailed Description
In order to make the purposes, technical solutions and advantages of the implementation of the present application more clear, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying 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 some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. Embodiments of the present application are described in detail below with reference to the accompanying drawings.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present application.
The present application is described in further detail below in conjunction with fig. 1-3.
The application provides a jet flow additive repairing process method for an aluminum alloy substrate, which comprises the following steps of:
step one, obtaining technological parameters for performing additive repair on an aluminum alloy substrate member, wherein the technology for performing high-speed jet additive repair on the aluminum alloy substrate is mainly limited by conditions such as dragging gas and dragging gas pressure, additive powder types, powder particle sizes, particle temperatures and the like;
step two, constructing a parameter process window for additive repair based on process parameters;
and thirdly, placing the aluminum alloy substrate component in a jet flow additive repairing device, and repairing the aluminum alloy substrate part according to the process window.
In one embodiment of the present application, a graphical representation of the relationship between the process parameters was experimentally provided, as shown in FIG. 2.
(1) Drag gas
Helium with purity of more than 99.99% is selected when the aluminum alloy main bearing component is repaired by the additive;
when the aluminum alloy secondary bearing member is repaired by the additive, helium and nitrogen mixed gas can be selected, wherein the mixing ratio is 70-80% of helium and 30-20% of nitrogen.
(2) Drag gas pressure
A sufficiently high drag gas pressure is a primary condition for particle acceleration;
when the aluminum alloy main bearing component is repaired by adding materials, the pressure range of towing gas is 5.0-7.0 MPa;
when the aluminum alloy secondary bearing member is repaired by the additive, the towing gas pressure range is 3.5-5.0 MPa.
(3) Selection of additive powder types
Powder type: common powders for high-speed jet additive repairing of aluminum alloy substrates include powder 6061, powder 2024, powder 7075, powder 5056 and the like. And determining proper additive powder types according to the material characteristics of the product to be repaired, wherein the powder 7075 and the powder 5056 can be used for the aluminum alloy main bearing component, and the powder 6061 and the powder 2024 can be used for the aluminum alloy secondary bearing component.
(4) Particle size of powder
Particle size of powder: under the same technological parameters, the impact rate of particles is inversely proportional to the particle size of the powder, and the particle size distribution of the powder is characterized by three indexes of D10, D50 and D90,
d10 represents a particle diameter at which the cumulative distribution of particles is 10%, i.e., the volume content of particles smaller than this particle diameter is 10% of the total particles;
d50 represents the particle diameter at which the cumulative distribution of particles is 50%, also called median particle diameter, i.e. the volume content of particles smaller than this particle diameter is 50% of the total particles;
d90 represents a particle diameter at which the cumulative distribution of particles is 90%, i.e., the volume content of particles smaller than this particle diameter is 90% of the total particles;
when the aluminum alloy main bearing member is repaired by the additive and the aluminum alloy secondary bearing member is repaired by the additive, the particle size distribution of the powder suitable for high-speed jet additive repair can be no more than 10 mu m, the D50 is 20-30 mu m, the D90 is no more than 60 mu m, and the powder is normally distributed.
In the present embodiment of the present invention,
the powder for high-speed jet flow 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 used as a measure, and the difference in hardness of the powder between batches should not exceed 10% in order to reduce the process dispersion.
(5) Particle temperature
Proper temperature is favorable for softening particles and improving the impact speed of the particles, but the high temperature resistance of the aluminum alloy base material is poor, and excessive temperature rise can cause annealing of the aluminum alloy base material, so that the original strength performance of the base material is damaged, and the meaning of additive repair is lost. When the aluminum alloy main bearing member and the aluminum alloy secondary bearing member are repaired by the additive, powder heating suitable for high-speed jet additive repair is controlled to be 200-400 ℃.
In one embodiment of the present application, a jet additive repair device is provided, comprising a working tank, a fixed table and a spray gun 2, as shown in fig. 3.
Specifically, an inlet is formed in the top of the working box, an air suction hole 3 and an air inlet hole 4 are formed in the side wall of the working box, and the air suction hole 3 is connected with an air extractor; the fixing table is arranged in the working box and used for fixing the aluminum alloy base material component 1 to be subjected to additive repair; the spray gun 2 stretches into the working box from the top inlet, the spray gun head corresponds to a to-be-added material repairing area of the aluminum alloy substrate component, and the spray gun 2 carries out jet flow additive repairing on the aluminum alloy substrate component according to the parameter process window.
Advantageously, in this embodiment, the suction holes 3 are arranged on the rear sidewall plate of the working box, as four are provided in fig. 3, and the rear part of the suction holes 3 is connected with an air extracting device, and a dust collecting device is further provided, and the suction holes 3 may be further provided with a cover plate for dispersing air flow to prevent the flow direction and speed of the high-speed particle jet flow from being disturbed. The air inlets 4 are arranged at the lower parts of the left wall plate and the right wall plate of the working box, as shown in figure 3, four air inlets are arranged and matched with the air suction holes 3 to ensure the ventilation in the working box. The working box can play the effect of preventing dust diffusion simultaneously, avoids environmental pollution, and the front side wall board of working box is transparent material, is convenient for observe the restoration behavior.
In one embodiment of the present application, a process for repairing a 7000 series aluminum alloy component using high velocity jet additive is as follows:
acquiring technological parameters for additive repair of the aluminum alloy substrate member;
the parameter process window is constructed as follows: helium with a purity of 99.999% was used for the drag gas; setting the towing gas pressure to be 6.2MPa; the type of the used 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 is spherical or has an aspect ratio of not more than 2 and approximately spherical, and the powder content of the above shape is 98.5%; the microhardness of the powder is 1.5GPa; the particle temperature was set at 400 ℃.
By using a certain jet flow additive repairing device, the aluminum alloy base material component is subjected to additive repairing based on the process parameter setting, so that an additive repairing layer with porosity lower than 1%, tensile strength up to 325MPa and Vickers hardness up to 145 can be prepared.
The jet flow additive repairing process method for the aluminum alloy base material can obtain a higher and stable additive repairing effect, meets the high-speed jet flow additive repairing requirement, and improves the operation efficiency.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in 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 (5)
1. The jet flow additive repairing process method for the aluminum alloy base material is characterized by comprising the following steps of:
step one, obtaining technological parameters for performing additive repair on an aluminum alloy substrate member, wherein the technological parameters comprise: drag gas and drag gas pressure, additive powder type, powder particle size, particle temperature;
step two, constructing a parameter process window for additive repair based on the process parameters;
step three, placing the aluminum alloy substrate component in a jet flow additive repairing device, and repairing the aluminum alloy substrate part by the jet flow additive according to the parameter process window;
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%;
the pressure range of the dragging gas is 5.0-7.0 Mpa;
the additive powder is powder 7075 or powder 5056;
the grain diameter of the powder is D10 not more than 10 mu m, D50 is 20-30 mu m, D90 is not more than 60 mu m, and the powder is normally distributed;
the temperature range of the particles is 200-400 ℃;
when the aluminum alloy secondary bearing member is repaired by the additive,
the dragging gas is helium and nitrogen mixed gas, and the mixing ratio is 70-80% helium and 30-20% nitrogen;
the pressure range of the dragging gas is 3.5-5.0 MPa;
the additive powder is of the type powder 6061 or powder 2024;
the grain diameter of the powder is D10 not more than 10 mu m, D50 is 20-30 mu m, D90 is not more than 60 mu m, and the powder is normally distributed;
the temperature range of the particles is 200-400 ℃;
wherein, the liquid crystal display device comprises a liquid crystal display device,
d10 is the particle diameter of which the cumulative distribution of particles is 10%, that is, the volume content of particles smaller than this particle diameter accounts for 10% of the total particles;
d50 is the particle diameter at which the cumulative distribution of particles is 50%, i.e., the volume content of particles smaller than this particle diameter is 50% of the total particles;
d90 is the particle diameter at which the cumulative distribution of particles is 90%, i.e., the volume content of particles smaller than this particle diameter is 90% of the total particles;
the process parameters also include powder shape, wherein,
when the additive repairs the aluminum alloy main bearing component, the powder is spherical or has the approximately spherical content with the aspect ratio not more than 2 not less than 97%;
when the additive repairs the aluminum alloy secondary bearing member, the powder is spherical or has the approximately spherical content with the aspect ratio not more than 2 not less than 97%;
the process parameters also include powder hardness, wherein,
when the aluminum alloy main bearing component is repaired by the additive, the difference of the hardness of the powder is not more than 10%;
when the additive repairs the aluminum alloy secondary bearing member, the difference of the hardness of the powder is not more than 10%.
2. The fluidic additive repair process method for an aluminum alloy substrate according to claim 1, wherein the fluidic additive repair device comprises:
the working box is characterized in that an inlet is formed in the top of the working box, an air suction hole (3) and an air inlet hole (4) are formed in the side wall of the working box, 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 an aluminum alloy base material member (1) to be subjected to additive repair;
the spray gun (2), spray gun (2) are stretched into from the top import in the work box, spray gun head corresponds with the area of waiting to add the material restoration of aluminum alloy substrate component.
3. The jet flow additive repairing process method for the aluminum alloy base material according to claim 2, wherein the air suction holes (3) are arranged on rear side wall plates of the working box, and the air inlet holes (4) are arranged on left and right side wall plates of the working box.
4. A jet flow additive repairing process for an aluminum alloy substrate according to claim 3, wherein the air suction hole (3) is connected with a dust collecting device.
5. The method of claim 4, wherein the front sidewall plate of the working box is made of transparent material.
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| CN204817040U (en) * | 2015-07-31 | 2015-12-02 | 北京天诚宇新材料技术有限公司 | Double - circuit send whitewashed supersonic speed cold spraying device |
| CN105937034A (en) * | 2016-06-23 | 2016-09-14 | 中国人民解放军第五七九工厂 | Cold spraying repairing method for cavitation pits of volute of booster pump |
| CN206635392U (en) * | 2017-04-08 | 2017-11-14 | 阳泉市世纪金星科贸有限公司 | A kind of cleaner for HVAF system |
| CN108274758A (en) * | 2017-12-29 | 2018-07-13 | 广东技术师范学院 | A kind of intelligent environment protection 3D printer |
| CN207889136U (en) * | 2018-02-08 | 2018-09-21 | 武汉芯态度科技有限公司 | A kind of 3D printer with air filter |
| CN208133626U (en) * | 2018-04-19 | 2018-11-23 | 陕西钰昆环境艺术工程有限公司 | A kind of 3D printing ventilation device |
| CN108860656B (en) * | 2018-07-28 | 2021-05-14 | 国营芜湖机械厂 | Cold spraying reinforcement repairing method for cracks of aluminum alloy structural part of airplane |
| CN109439960B (en) * | 2018-11-21 | 2021-01-12 | 兰州理工大学 | Cold spraying additive repairing material for abraded Roots blower cover plate |
| CN110918416B (en) * | 2019-12-09 | 2021-11-19 | 中国航空工业集团公司沈阳飞机设计研究所 | Main bearing part repairing method based on three-dimensional material increase |
| CN111962057A (en) * | 2020-09-09 | 2020-11-20 | 中国人民解放军第五七一九工厂 | Composite surface reinforcing and repairing method for aviation aluminum alloy shaft abrasion |
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