CN114959544A - Coating capable of prolonging service life of stirring head and method - Google Patents
Coating capable of prolonging service life of stirring head and method Download PDFInfo
- Publication number
- CN114959544A CN114959544A CN202210590468.5A CN202210590468A CN114959544A CN 114959544 A CN114959544 A CN 114959544A CN 202210590468 A CN202210590468 A CN 202210590468A CN 114959544 A CN114959544 A CN 114959544A
- Authority
- CN
- China
- Prior art keywords
- stirring
- stirring head
- shaft shoulder
- coating
- service life
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003756 stirring Methods 0.000 title claims abstract description 141
- 238000000576 coating method Methods 0.000 title claims abstract description 83
- 239000011248 coating agent Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 39
- 239000011159 matrix material Substances 0.000 claims abstract description 21
- 238000010285 flame spraying Methods 0.000 claims abstract description 19
- 238000005507 spraying Methods 0.000 claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims description 5
- 238000005054 agglomeration Methods 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 9
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 241001391944 Commicarpus scandens Species 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000000994 depressogenic effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 229910009043 WC-Co Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention provides a coating and a method capable of prolonging the service life of a stirring head, which relate to the technical field of welding and comprise a coating body, wherein the coating body is formed by spraying WC matrix powder material on a shaft shoulder and a stirring needle by a supersonic flame spraying method, and the coating body is attached to the end surface of the shaft shoulder of the stirring head and the outer surface of the stirring needle; the WC base powder material is added with binder phase Co element and Re element, wherein the mass fraction of Co is 8-12%, and the mass fraction of Re is 1-4%. The WC matrix powder material is added with the binder phase Co element and the Re element in different proportions, wherein the Co element plays a role in binding a hard phase WC matrix, the Re element can improve the toughness of the coating, so that the coating body is not easy to break, the coating body is firmly sprayed on the shaft shoulder end surface of the stirring head and the outer surface of the stirring needle, the wear resistance and the toughness of the stirring head are improved, and the service life of the stirring head is greatly prolonged; and the process is relatively simple, and the cost of the stirring head is reduced.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a coating capable of prolonging the service life of a stirring head and a method.
Background
The stirring head is known as the core of Friction Stir Welding (FSW), and is one of the important links for realizing the FSW. Friction stir welding is mainly completed by means of intense friction heat generation and extrusion plastic deformation between a high-speed rotating stirring head and a workpiece to be welded, and a stirring pin and a shaft shoulder of the stirring head are main working surfaces in general. Under severe service conditions such as severe friction at high temperature, the abrasion of the working surface, thermal fatigue and the breakage of the stirring pin are the main failure modes of the stirring head, wherein the abrasion of the working surface causes the increase of the friction coefficient, further increases the friction heat of the stirring head, reduces the strength of the stirring pin, and is one of the important reasons for the breakage of the stirring pin. Therefore, the improvement of the high-temperature wear resistance of the stirring head has great significance for prolonging the service life of the stirring head.
In order to prolong the service life of the stirring head, two main solutions are provided: firstly, from the structure angle consideration of stirring head, a novel friction stir welding stirring head in the current patent, this structure stirring head adopts the disconnect-type for stirring needle shaft shoulder and centre gripping handle, and both are fixed with the connecting piece, only need corresponding position when stirring needle and shaft shoulder lead to the surface to scrap because thermal fatigue or wearing and tearing, and need not change whole stirring head, the waste of causing, but this kind of structure stirring head is comparatively complicated. Secondly, a method for improving the wear resistance and high temperature resistance of the stirring head for friction stir welding in the prior patent from the production processing technology (material selection, processing technology, heat treatment technology and the like) of the stirring head is used for casting high-speed tool steel W 18 Cr 4 And V, processing the required concave shaft shoulder and conical stirring pin shapes by adopting a free forging and die forging technology, heating and melting the surface layers of the shaft shoulder and the stirring pin matrix and nickel-based ceramic composite alloy powder preset on the surface layers and rapidly condensing the surface layers and the nickel-based ceramic composite alloy powder by adopting a laser deposition technology to prepare the annular and spiral wear-resistant high-temperature-resistant coating stirring head.
Therefore, the structure and the process for prolonging the service life of the stirring head in the prior art are complex, and the effect of prolonging the service life is poor.
Disclosure of Invention
The invention aims to provide a coating structure and a coating method capable of prolonging the service life of a stirring head, and aims to solve the technical problems that the structure and the process for prolonging the service life of the stirring head are complex and the service life prolonging effect is poor in the prior art; the technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to realize the purpose, the invention provides the following technical scheme:
the coating capable of prolonging the service life of the stirring head comprises a coating body, wherein the coating body is formed by spraying a WC matrix powder material on a shaft shoulder and a stirring needle by a supersonic flame spraying method, and the coating body is attached to the end surface of the shaft shoulder of the stirring head and the outer surface of the stirring needle;
the WC base powder material is added with binder phase Co element and Re element, wherein the mass fraction of Co is 8-12%, and the mass fraction of Re is 1-4%.
Preferably, the WC matrix powder material is manufactured by an agglomeration method, wherein the WC has a primary grain size of 30 to 500nm and the WC matrix powder material has a particle size of 1 to 40 μm.
Preferably, the mass fraction of Co is 10.1%, and the mass fraction of Re is 2%.
Preferably, the WC base powder material is further added with Fe element, and the mass fraction of Fe is 1% -3%.
Preferably, the mass fraction of Fe is 1%.
Preferably, the shaft shoulder end face of the stirring head is provided with a concave part, and the coating body covers the concave part.
Preferably, all of the recesses are evenly spaced around the pin.
The invention also provides a method for prolonging the service life of the stirring head, wherein a WC matrix powder material is sprayed on the shaft shoulder and the stirring needle by adopting a supersonic flame spraying method, and the coating capable of prolonging the service life of the stirring head is formed on the end surface of the shaft shoulder and the outer surface of the stirring needle.
Preferably, the method for prolonging the service life of the stirring head comprises the following specific steps:
processing a concave part on the end face of the shaft shoulder, and cleaning and derusting the surface of the stirring pin and the end face of the shaft shoulder;
fixing the stirring head by adopting a clamp, spraying a WC base powder material on a shaft shoulder and a stirring needle by using a supersonic flame spraying method, and covering the concave part;
and step three, naturally cooling, and taking down the stirring head for use.
Preferably, when the WC base powder material is sprayed on the shaft shoulder and the stirring needle by using a supersonic flame spraying method, the spraying direction is vertical to the stirring head and the surface to be sprayed on the stirring needle.
Compared with the prior art, the coating structure and the method capable of prolonging the service life of the stirring head have the following beneficial effects: the coating body is formed by spraying a WC matrix powder material on a shaft shoulder and a stirring needle by a supersonic flame spraying method, wherein binder phase Co elements and Re elements with different proportions are added in the WC matrix powder material, the Co elements play a role in binding a hard phase WC matrix, the Re elements can improve the toughness of the coating, so that the coating body is not easy to break, the coating body is firmly sprayed on the shaft shoulder end surface of the stirring head and the outer surface of the stirring needle, the wear resistance and the toughness of the stirring head are improved, and the service life of the stirring head is greatly prolonged; and the process is relatively simple, and the cost of the stirring head is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the matching structure of a coating body and a stirring head;
FIG. 2 is a schematic illustration of the use of a supersonic flame spray to spray WC base powder material onto a shoulder;
FIG. 3 is a schematic view of the distribution structure of the depressed parts on the shoulder end surface of the stirring head.
In the figure 1, a shaft shoulder; 2. a stirring pin; 3. a coating body; 4. a recessed portion; 5. a spray gun.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the equipment or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The embodiment of the invention provides a coating structure and a coating method capable of prolonging the service life of a stirring head, which improve the wear resistance and toughness of the stirring head and greatly prolong the service life of the stirring head; and the process is relatively simple, and the cost of the stirring head is reduced.
The technical solution provided by the present invention is explained in more detail below with reference to fig. 1 to 3.
Example one
As shown in fig. 1 to 3, the present embodiment provides a coating capable of improving the life of a stir head, which includes a coating body 3, wherein the coating body 3 is formed by spraying a WC base powder material on a shaft shoulder 1 and a stir needle 2 by a supersonic flame spraying method, and the coating body 3 is attached to the end surface of the shaft shoulder 1 of the stir head and the outer surface of the stir needle 2; the WC base powder material is added with binder phase Co element and Re element, wherein the mass fraction of Co is 8-12%, and the mass fraction of Re is 1-4%.
The coating capable of prolonging the service life of the stirring head is characterized in that the coating body 3 is formed by spraying a WC (wolfram carbide) matrix powder material on the shaft shoulder 1 and the stirring needle 2 by a supersonic flame spraying method, and binder phase Co elements and Re elements with different proportions are added into the WC matrix powder material, wherein the Co elements play a role in binding a hard phase WC matrix, and the Re elements can improve the toughness of the coating, so that the coating body 3 is not easy to break, the coating body 3 is firmly sprayed on the end surface of the shaft shoulder 1 of the stirring head and the outer surface of the stirring needle 2, the wear resistance and the toughness of the stirring head are improved, and the service life of the stirring head is greatly prolonged.
Wherein, Co element mainly plays a role of bonding brittle and hard phase WC, the porosity of the coating is easily increased and the compactness of the coating body 3 is reduced due to too low content of the Co element, and the hardness and the wear resistance of the WC-Co based coating are easily reduced due to too high content of the Co element, so that the effect is better when the mass fraction of Co is 8-12% through tests.
The Re element mainly plays a role in improving the toughness of the coating body 3 and enabling the coating body 3 not to be easily broken. The WC matrix is a brittle hard phase and can ensure the hardness of the coating body 3, so that the mass fraction of the Re element is not too large, and tests show that the performance of the coating body 3 is better when the mass fraction of the Re is 1-4%.
In an alternative embodiment, in this embodiment, the mass fraction of Co is 10.1%, and the mass fraction of Re is 2%.
When the Co and the Re adopt the proportion, the hardness of the coating body 3 can be ensured, and the coating body has certain toughness, so that the wear resistance of the coating body 3 is improved, and the service life of the coating body is prolonged.
The WC matrix powder material is a nano material and is manufactured by an agglomeration method, fine WC crystal grains can improve the toughness of the coating due to the fine grain strengthening effect, and the smaller the crystal grains, the greater the manufacturing difficulty; meanwhile, the WC-Co particles have gaps and are too large, so that insufficient heating is easily caused in the spraying process, the density of the coating is reduced, the particles are too small, so that powder is easily over-melted, and WC is oxidized in the air. Therefore, in this example, the WC had a primary grain size of 30 to 500nm, and the WC base powder material had a particle size of 1 to 40 μm.
In order to further ensure the hardness and rigidity of the coating body 3 and improve the wear resistance of the coating body 3, as an optional embodiment, a Fe element is further added into the WC matrix powder material, and the mass fraction of Fe is 1% -3%.
The addition of Fe to the WC base powder material can ensure the hardness and rigidity of the coating body 3, but in order to provide the coating body 3 with a certain toughness and prevent the coating body 3 from breaking, the content of Fe should not be too high, so the mass fraction of Fe is 1% to 3%.
As an alternative embodiment, in this embodiment, the mass fraction of Fe is 1% based on the mass fraction of Co being 10.1% and the mass fraction of Re being 2%.
In this embodiment, binder phases Co (cobalt element) and Re (rhenium element) are added to the powder in different proportions according to conditions such as the welding material, the process parameters, and the operating temperature of the stir head, and the WC matrix powder material has the following chemical components (mass fraction%:
TABLE 1 stirring head coating body Material
Referring to fig. 1-3, since the end surface of the shaft shoulder 1 of the mixing head is a large plane, in order to make the coating body 3 better attached to the end surface of the shaft shoulder 1 of the mixing head, as an alternative embodiment, referring to fig. 3, the end surface of the shaft shoulder 1 of the mixing head is provided with a concave portion 4, and the coating body 3 covers the concave portion 4. Above-mentioned depressed part 4 sets up above-mentioned pit structure for the pit structure at the 1 terminal surface of the shaft shoulder of stirring head, can improve the adhesive force of coating body 3, prevents that coating body 3 from ftractureing on shaft shoulder 1.
As alternative embodiments, the above-mentioned recessed portions 4 are preferably two or more, specifically, three, four, five or more, and all the recessed portions 4 are uniformly spaced around the stirring pin 2. This structure can make coating body 3 and depressed part 4 cooperation to better attached on the shaft shoulder 1 terminal surface.
In this example, 3 kinds of stirring heads of the same specification were selected for the life test. The stir head of type 1 was not coated and the stir head of types 2 and 3 were each WC-12Co (prior art coating) and the coating material described above in this example. The welding parameters and materials are consistent, the rotating speed is 1600 plus 2000rpm, the welding speed is 500 plus 800mm/min, and the material is ADC 12. The statistical results of the service life of the test are as follows:
the statistics of the welding life of the stirring head by comparing different coating structures are as follows:
TABLE 2 comparison of Agitator head service life
From the test results, the service life of the stirring head is prolonged to 2600-3000m compared with the conventional WC-12Co coating, and the service life of the stirring head is obvious compared with the conventional WC-12Co coating sprayed on the stirring head without the coating.
Example two
The embodiment provides a method for prolonging the service life of a stirring head, wherein a WC base powder material is sprayed on a shaft shoulder 1 and a stirring needle 2 by adopting a supersonic flame spraying method, and the coating capable of prolonging the service life of the stirring head is formed on the end surface of the shaft shoulder 1 and the outer surface of the stirring needle 2.
The present embodiment is based on the supersonic flame spraying technology, and mainly performs spraying on the working surfaces of the stirring head (the end surfaces of the stirring needle 2 and the shaft shoulder 1). FIG. 2 is a schematic view of a WC base powder material sprayed on a shaft shoulder 1 using a supersonic flame spraying method; the end surface of the shaft shoulder 1 of the stirring head and the stirring pin 2 are contacted with the welded materials. In the friction stir welding process, the end face of the shaft shoulder 1 of the stirring head and the stirring pin 2 are in violent friction with materials to generate heat required by welding, and the surface of the stirring head is most easily worn and thermally impacted at high temperature to cause surface failure.
As an alternative embodiment, the method for prolonging the service life of the stirring head comprises the following specific steps:
step one, processing a concave part 4 on the end face of a shaft shoulder 1, referring to fig. 3, and cleaning and derusting the surface of a stirring pin 2 and the end face of the shaft shoulder 1;
fixing a stirring head by adopting a clamp, preheating a workpiece by using a flame of a spray gun 5 before spraying, setting spraying parameters on a spraying system, referring to fig. 2, spraying a WC base powder material on a shaft shoulder 1 and a stirring needle 2 by using a supersonic flame spraying method, and covering a concave part 4;
the specific spray application parameters are shown in the following table:
TABLE 3 supersonic flame spraying Process parameters
And step three, naturally cooling, and taking down the stirring head for use. In order to increase the service life of the stirring head, surface coating materials are very important. As shown in fig. 1-3, the stirring head of the present embodiment utilizes the supersonic flame spraying technology to spray the coating body 3 on the end surface of the shaft shoulder 1 of the stirring head and the stirring needle 2, and the heat resistance and wear resistance of the coating body 3 are improved.
As an alternative embodiment, referring to fig. 2, when the WC base powder material is sprayed on the shoulder 1 and the pin 2 by the supersonic flame spraying method, the spraying direction is perpendicular to the surface to be sprayed on the pin 2 and the pin head. When spraying, the spraying direction is perpendicular to the surface to be sprayed, as shown in fig. 2; the moving speed of the spray gun 5 is kept uniform and controlled in a reasonable interval, preferably 100-.
The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The coating capable of prolonging the service life of the stirring head is characterized by comprising a coating body, wherein the coating body is formed by spraying a WC base powder material on a shaft shoulder and a stirring needle by a supersonic flame spraying method, and the coating body is attached to the end surface of the shaft shoulder of the stirring head and the outer surface of the stirring needle;
the WC base powder material is added with binder phase Co element and Re element, wherein the mass fraction of Co is 8-12%, and the mass fraction of Re is 1-4%.
2. The coating capable of improving the life of a stirring head as claimed in claim 1, wherein the WC matrix powder material is manufactured by an agglomeration method, wherein the WC has a primary grain size of 30-500nm, and the WC matrix powder material has a particle size of 1-40 μm.
3. The coating capable of improving the service life of the stirring head as recited in claim 1, wherein the mass fraction of Co is 10.1%, and the mass fraction of Re is 2%.
4. The coating capable of improving the service life of the stirring head as claimed in claim 1, wherein Fe is further added to the WC matrix powder material, and the mass fraction of Fe is 1% -3%.
5. The coating capable of improving the service life of the stirring head as claimed in claim 4, wherein the mass fraction of Fe is 1%.
6. The coating capable of improving the service life of the stirring head as claimed in claim 1, wherein the shaft shoulder end surface of the stirring head is provided with a concave part, and the coating body covers the concave part.
7. The coating for improving the life of a stir head of claim 6 wherein all of the depressions are evenly spaced around the pin.
8. A method for improving the life of a stirring head, which is characterized in that a WC base powder material is sprayed on a shaft shoulder and a stirring needle by a supersonic flame spraying method, and a coating capable of improving the life of the stirring head according to any one of claims 1 to 7 is formed on the end surface of the shaft shoulder and the outer surface of the stirring needle.
9. The method for improving the service life of the stirring head as recited in claim 8, characterized in that the method for improving the service life of the stirring head comprises the following specific steps:
processing a concave part on the end face of the shaft shoulder, and cleaning and derusting the surface of the stirring pin and the end face of the shaft shoulder;
fixing the stirring head by adopting a clamp, spraying a WC base powder material on a shaft shoulder and a stirring needle by using a supersonic flame spraying method, and covering the concave part;
and step three, naturally cooling, and taking down the stirring head for use.
10. The method for improving the life of a stirring head according to claim 9, wherein the WC base powder material is sprayed on the shaft shoulder and the stirring pin by the supersonic flame spraying method in a direction perpendicular to the surface to be sprayed on the stirring head and the stirring pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210590468.5A CN114959544A (en) | 2022-05-26 | 2022-05-26 | Coating capable of prolonging service life of stirring head and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210590468.5A CN114959544A (en) | 2022-05-26 | 2022-05-26 | Coating capable of prolonging service life of stirring head and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114959544A true CN114959544A (en) | 2022-08-30 |
Family
ID=82958009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210590468.5A Pending CN114959544A (en) | 2022-05-26 | 2022-05-26 | Coating capable of prolonging service life of stirring head and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114959544A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114233A (en) * | 2013-03-13 | 2013-05-22 | 成都广正科技有限公司 | Coating gradient cemented carbide tool material |
| CN106392300A (en) * | 2016-11-23 | 2017-02-15 | 北京世佳博科技发展有限公司 | Method for prolonging service life of stirring head of friction stir welding |
| CN113652624A (en) * | 2021-08-10 | 2021-11-16 | 水利部杭州机械设计研究所 | Tungsten carbide/silicon carbide-based composite material and coating suitable for oxygen-propane supersonic flame short-distance spraying and preparation method thereof |
-
2022
- 2022-05-26 CN CN202210590468.5A patent/CN114959544A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114233A (en) * | 2013-03-13 | 2013-05-22 | 成都广正科技有限公司 | Coating gradient cemented carbide tool material |
| CN106392300A (en) * | 2016-11-23 | 2017-02-15 | 北京世佳博科技发展有限公司 | Method for prolonging service life of stirring head of friction stir welding |
| CN113652624A (en) * | 2021-08-10 | 2021-11-16 | 水利部杭州机械设计研究所 | Tungsten carbide/silicon carbide-based composite material and coating suitable for oxygen-propane supersonic flame short-distance spraying and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 何旭初 等: "钢结硬质合金的制备原理与技术", 31 January 2017, 湖南科学技术出版社, pages: 326 - 327 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7635515B1 (en) | Heterogeneous composite bodies with isolated lenticular shaped cermet regions | |
| US6254704B1 (en) | Method for preparing a thermal spray powder of chromium carbide and nickel chromium | |
| CN110202145A (en) | Preparation method based on laser gain material manufacture high-entropy alloy diamond composite | |
| CN105463451B (en) | A kind of method for improving agitating friction weldering stirring-head Wear-resistant, high-temperature resistant performance | |
| US9745648B2 (en) | Powder | |
| CN103290403B (en) | A kind of method preparing high-content WC enhancing alloy powder coating | |
| CN109355652A (en) | Laser melting coating Co-based alloy powder and preparation method thereof | |
| CN109930053A (en) | A kind of FeCoNiCrMn high-entropy alloy and the method for preparing wear-resistant coating using the alloy | |
| CN86107901A (en) | The iron alloy that contains molybdenum, copper and boron | |
| CN106392300A (en) | Method for prolonging service life of stirring head of friction stir welding | |
| CN1498984A (en) | Multi-element alloy coat | |
| CN108677075B (en) | A kind of preparation method of stirring friction welding agitator head material and stirring-head | |
| CN110424002B (en) | Composite coating, preparation method and application | |
| WO2017084132A1 (en) | Composite hard-surface material and preparation method therefor | |
| JP2017519111A (en) | Thermal spray assembly and method using thermal spray assembly | |
| CN110016601A (en) | A kind of nickel chromium triangle-diamond alloy composite powder and its preparation method and application | |
| US3779720A (en) | Plasma sprayed titanium carbide tool steel coating | |
| CN110014146A (en) | A kind of nickel-molybdenum iron chromium-diamond alloy composite powder and its preparation method and application | |
| US20080113105A1 (en) | Coating Formed By Thermal Spraying And Methods For The Formation Thereof | |
| CN108425085A (en) | A kind of compound CuNiIn powder and the preparation method and application thereof | |
| JP2020510747A (en) | Electrode coating method for resistance welding and electrode for resistance welding | |
| CN114959544A (en) | Coating capable of prolonging service life of stirring head and method | |
| CN107378167B (en) | A method of improving SiCp/Al composite material stirring friction welding agitator head wearability | |
| CN100387775C (en) | Wearable papermaking coating scraper | |
| JPS62270277A (en) | Production of titanium base alloy-made wear resistant member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |