CN116555755A - Preparation method of cladding alloy layer on concave and convex spherical matching surfaces and support - Google Patents

Preparation method of cladding alloy layer on concave and convex spherical matching surfaces and support Download PDF

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Publication number
CN116555755A
CN116555755A CN202310556601.XA CN202310556601A CN116555755A CN 116555755 A CN116555755 A CN 116555755A CN 202310556601 A CN202310556601 A CN 202310556601A CN 116555755 A CN116555755 A CN 116555755A
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China
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cladding
spherical surface
powder
alloy layer
laser
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Inventor
李炯
孙诚
李晓明
张俊
王阔
张亚军
高荣状
孟庆龙
王庆培
刘国欣
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Fengze Intelligent Equipment Co ltd
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Fengze Intelligent Equipment Co ltd
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Priority to CN202310556601.XA priority Critical patent/CN116555755A/en
Publication of CN116555755A publication Critical patent/CN116555755A/en
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    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • C23C24/106—Coating with metal alloys or metal elements only
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/04—Bearings; Hinges
    • E01D19/042—Mechanical bearings
    • E01D19/046—Spherical bearings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/36—Bearings or like supports allowing movement
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention provides a preparation method of a cladding alloy layer on a concave spherical surface and a convex spherical surface and a support. The preparation steps of the cladding alloy layer comprise: laser cladding alloy powder on a matching surface needing to form a cladding alloy layer through a high-speed laser cladding device so as to form the cladding alloy layer on the matching surface; then polishing the cladding alloy layer; in the laser cladding process, controlling the protective air flow to be 2-20L/min, the powder feeding air flow of the alloy powder to be 1-3L/min, and controlling the power of laser to be gradually increased from 20% to 90%, and the powder feeding amount of the alloy powder to be gradually increased from 1.5g/min to 75g/min; the cladding height is controlled to be 15-25mm.

Description

Preparation method of cladding alloy layer on concave and convex spherical matching surfaces and support
Technical Field
The invention belongs to the field of bridge or building supports, and particularly relates to a preparation method of a cladding alloy layer on a concave spherical surface and a convex spherical surface matching surface and a support.
Background
The support is used as an important component in the bridge and building fields, and on one hand, the support plays a role in supporting the load of the upper structure, and on the other hand, the support sensitively transfers the load and deformation of the upper structure to the lower structure. Generally comprising an upper base connected to the upper structure, a lower base connected to the lower structure, and a spherical cap positioned between the upper and lower bases. The basic construction of the support is known in the art, and is described in the literature, for example in CN 2047030358U.
The support is used for reducing the resistance of the sliding surface, and the matching surface of the support and the wear-resistant sliding plate needs to have higher wear resistance, smaller roughness and smaller friction coefficient. Carbon steel is generally used for cladding stainless steel argon arc welding, and although the basic requirements of engineering can be met, some key problems still exist to be solved.
In practical operation, the spherical coated stainless steel plate needs to be pressed into a corresponding spherical shape (the tool size is slightly smaller than the spherical surface size of the spherical crown) by a spherical tool, and then the spherical stainless steel plate is placed on the spherical crown, and the spherical stainless steel plate and the spherical crown are combined in a pressurizing and welding mode. The process pressurizes the stainless steel plate for many times, and greatly reduces the wear resistance and surface smoothness of the stainless steel plate. And the limitation of compression molding equipment, the ultra-large spherical crown stainless steel needs to be spliced, and the spliced part is ground flat after being welded by argon arc welding, so that the smoothness and the profile degree cannot be ensured, and the service performance of the spherical crown is affected. For the convex spherical workpiece and the concave spherical workpiece, the stainless steel can shrink no matter how tightly pressed, and the joint surface just provides space for the shrinkage of the stainless steel after the welding is finished, so that the stainless steel and the base material are in a void.
Disclosure of Invention
The invention provides a preparation method of a cladding alloy layer on a concave spherical surface and a convex spherical surface matching surface and a support for solving the defects in the prior art. According to the invention, the cladding alloy layer is formed on the concave spherical surface and the convex spherical surface by high-speed laser cladding to replace the traditional stainless steel ball cladding, so that the phenomenon that stainless steel and a base material are not closely adhered and are free of air can be avoided, and the formed cladding alloy layer is metallurgically bonded with the concave spherical surface or the convex spherical surface, so that the cladding alloy layer has good connection strength and can ensure stability and reliability.
The invention provides the following technical scheme for achieving the purpose:
in one aspect, the present invention provides a method for preparing a clad alloy layer on a mating surface of a concave spherical surface and a convex spherical surface, wherein the concave spherical surface and the convex spherical surface are mutually matched, a clad alloy layer is formed on the mating surface of the concave spherical surface and the convex spherical surface and/or on the mating surface of the convex spherical surface and the concave spherical surface, and the preparation steps of the clad alloy layer include:
laser cladding alloy powder on a matching surface needing to form a cladding alloy layer through a high-speed laser cladding device so as to form the cladding alloy layer on the matching surface; then polishing the cladding alloy layer;
in the laser cladding process, controlling the protective air flow to be 2-20L/min, the powder feeding air flow of the alloy powder to be 1-3L/min, and controlling the power of laser to be gradually increased from 20% of preset power to 90% of preset power, wherein the powder feeding amount of the alloy powder is gradually increased from 1.5g/min to 75g/min; the cladding height is controlled to be 15-25mm.
The invention adopts a high-speed laser cladding mode to carry out laser cladding of alloy powder on the concave spherical surface and/or the convex spherical surface through the process operation, so that a compact and uniform cladding alloy layer can be formed, and the cladding alloy layer and the concave spherical surface or the convex spherical surface are in metallurgical bonding, so that the connecting strength is high, and the stable reliability is better. The inventor finds that in the high-speed laser cladding process, the construction is performed by using the protection gas flow, so that the safety of cladding head equipment can be protected, and the influence of the protection gas on powder beam distribution can be greatly reduced; if the flow is too large, powder is easily blown off, and if the flow is too small, the safety of the cladding head is difficult to protect; by adopting the powder feeding air flow, the powder in the powder feeder is not only favorably completely fed out, but also can not cause powder splashing, and is favorable for obtaining a better cladding effect. Meanwhile, the high-speed laser cladding is carried out by adopting the technological parameters of the laser power, the powder feeding amount and the cladding height, so that the cladding effect with better flatness and combination degree can be obtained.
In a preferred embodiment, the preset power of the laser is 6000-12000W, and the power of the laser is gradually increased from 20% of the preset power to 90% of the preset power at a rate of 1200-2400W/h;
the powder feeding amount of the alloy powder is gradually increased from 1.5g/min to 75g/min at the rate of 15-20 g/h.
In a preferred embodiment, the cladding path used for performing the laser cladding is a straight line or a spiral line.
In a preferred embodiment, the rate of the horizontal turntable of the high speed laser cladding apparatus is adjusted during the laser cladding process to maintain a constant feed rate. By means of the operation, the feeding speed is constant, the influence of parameter variation on the cladding effect can be reduced, and for specific feeding speed setting, a person skilled in the art can adjust and determine the feeding speed according to actual process conditions such as workpiece size, laser power and the like.
In some embodiments, the cladding alloy layer is polished by a numerical control polishing device, so that the profile and the surface roughness of the cladding alloy layer meet the required requirements.
Furthermore, after the preparation step of cladding the alloy layer is completed, the exposed part outside the concave spherical surface and the convex spherical surface can be subjected to paint treatment so as to achieve the aim of corrosion prevention.
In a preferred embodiment, the alloy powder has a particle size of 20 μm to 120 μm and a bulk density of 3.0g/cm or more 3 The fluidity is less than or equal to 30s/50g; the adoption of the alloy powder meeting the requirements is beneficial to ensuring the fluidity of the alloy powder, avoiding the phenomena of blockage and the like in the laser cladding process, and being beneficial to obtaining a better cladding effect.
Preferably, the alloy powder is previously subjected to a baking treatment, and the conditions of the baking treatment include: the temperature is 100-150deg.C, and the time is 30-60min. The alloy powder can be dehumidified by baking treatment.
Preferably, the alloy powder is selected from one or more of nickel-based, cobalt-based, iron-based self-fluxing alloy powders. Alloy powders are commercially available, and specifically, for example, ni20 powder, ni60 powder, in625 powder, co06 powder, co40 powder, fe01 powder, fe06 powder, or Fe31 powder may be employed.
In some embodiments, in the laser cladding process, the feeding mode adopts tool rotation, and the X/Y/Z axes of cladding equipment are mutually matched; or the Y-axis rotation X/Z-axis linkage of the manipulator of the cladding equipment and the spherical crown are fixed.
Preferably, the laser cladding adopts a preset powder method or a synchronous powder feeding method;
preferably, the laser cladding powder feeding mode adopts center powder feeding or coaxial powder feeding. The preferable powder feeding mode is adopted, so that the powder utilization rate and cladding efficiency are improved, and a cladding alloy layer with a smoother surface and small fluctuation is obtained.
In some embodiments, the cladding alloy layer has a thickness of 0.8-1.2mm.
Further, the concave spherical surface and the convex spherical surface are mutually matched surfaces in a bridge or building support, wherein the convex spherical surface is from a spherical crown in the support, and the concave spherical surface is from a base mutually matched with the spherical crown. Further, before laser cladding, the ball crown and the base are subjected to shot blasting treatment, and the surface roughness after the shot blasting treatment reaches Rz 20-80 mu m, so that the adhesion effect in the subsequent paint treatment is improved.
The invention also provides a bridge or building support, which comprises a spherical crown and a base matched with the spherical crown, wherein the spherical crown at least comprises a convex spherical surface, and a concave spherical surface matched with the convex spherical surface is formed on the base matched with the convex spherical surface; the convex spherical surface and/or the concave spherical surface is formed with a clad alloy layer formed by the above-described production method.
The technical scheme provided by the invention has the following beneficial effects:
by adopting the high-speed laser cladding process, a cladding alloy layer is formed on the concave spherical surface or the convex spherical surface to replace the traditional stainless steel cladding, the cladding alloy layer and the base material are in metallurgical bonding, the obtained cladding alloy layer and the base material have better connection strength, and the cladding alloy layer and the base material form an integrated structure, so that the stability and the reliability can be ensured; compared with a coated stainless steel plate, the problem of non-adhesion and void two layers of leather is avoided.
Compared with the traditional cladding technology, the high-speed laser cladding technology is adopted, the high-speed laser cladding technology can achieve higher linear speed, and the overall efficiency can reach 3-4 times of that of the traditional cladding technology.
The cladding layer obtained by the preparation method is flat, can be directly ground and polished, does not need turning, and greatly saves materials and processing cost.
The cladding alloy layer is formed by high-speed laser cladding, so that the heat input to the workpiece is small, and the thermal deformation of the workpiece is small. In addition, high-speed laser cladding is adopted, so that higher power density can be achieved, and high-melting-point alloy powder materials can be adopted.
Drawings
FIG. 1 is a schematic illustration of a cladding alloy layer formed on a convex spherical surface of a spherical cap in one embodiment;
FIG. 2 is a schematic illustration of a cladding alloy layer formed on a concave spherical surface of a base that mates with a spherical cap in one embodiment.
Detailed Description
In order that the invention may be readily understood, a further description of the invention will be provided with reference to the following examples. It should be understood that the following examples are only for better understanding of the present invention and are not meant to limit the present invention to the following examples.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Where specific experimental steps or conditions are not noted in the examples, they may be performed according to the operations or conditions of the corresponding conventional experimental steps in the art. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The construction of the bridge or building support, as already mentioned above, comprises an upper base, a lower base and a spherical cap between the upper base and the lower base, the specific construction of the support being conventional in the art and not described in detail. The spherical cap comprises at least one convex spherical surface, as shown in fig. 1, and the spherical cap 1 comprises one convex spherical surface, although in some holders, the spherical cap may comprise two convex spherical surfaces, etc. Correspondingly, a base 2, which cooperates with the spherical cap 1 in the seat, is formed with a concave spherical surface for adaptation to the convex spherical surface of the spherical cap 1, as shown in fig. 2. In the existing application of the support, a wear-resistant slide plate is also provided between the concave and convex spherical surfaces. In the prior art, stainless steel plates are used to coat the spherical surface so that the mating surface with the wear-resistant skateboard has improved wear resistance, less roughness and coefficient of friction. The main improvement of the present invention is that the cladding alloy layer 3 is formed on the mating surface of the concave spherical surface and/or the convex spherical surface to replace the cladding of the stainless steel plate, and other structures of the support can adopt the conventional structural form in the field, and the description is omitted. In the invention, the mentioned concave spherical surface and the convex spherical surface are mutually matched, and the indirect matching situation between the concave spherical surface and the convex spherical surface is covered, for example, other intermediate parts such as the wear-resistant sliding plate and the like are also arranged between the concave spherical surface and the convex spherical surface.
In some preferred embodiments of the present invention, the main steps of forming the cladding alloy layer on the concave spherical surface of the base 2 and/or the convex spherical surface of the spherical cap 1 include:
1) Adopts the particle size of 20-120 mu m, and the apparent density is more than or equal to 3.0g/cm 3 The alloy powder with the fluidity less than or equal to 30s/50g is baked in advance, and the baking condition is that the temperature is 100-150 ℃ and the time is 30-60min;
2) In a high-speed laser cladding device, the alloy powder is laser clad on a matching surface which needs to form a cladding alloy layer, namely the concave spherical surface or the convex spherical surface which are matched with each other;
wherein, the technological conditions of laser cladding include: controlling the protective air flow to be 2-20L/min, the powder air flow of the alloy powder to be 1-3L/min, the preset power of the laser to be 6000-12000W, and controlling the power of the laser to be gradually increased from 20% of the preset power to 90% of the preset power, wherein the increasing rate is preferably 1200-2400W/h; the powder feeding amount of the alloy powder is gradually increased from 1.5g/min to 75g/min, and the increasing rate is preferably 15-20g per hour; in the cladding process, the height of the cladding head is continuously reduced, and the cladding height is ensured to be 15-25mm; wherein the shielding gas can be argon or nitrogen, and the powder feeding gas can be argon or nitrogen.
The scanning speed is preferably 0.2-12m/min.
The laser cladding adopts a preset powder method or a synchronous powder feeding method, and the powder feeding mode preferably adopts a central powder feeding or coaxial powder feeding;
in the laser cladding process, the cladding path is a straight line or a spiral line.
During laser cladding, the speed of a horizontal turntable of the high-speed laser cladding device is adjusted so as to keep the feeding speed constant. In the laser cladding process, a feeding mode adopts tool rotation, and X/Y/Z axes of cladding equipment are matched with each other; or the Y-axis rotation X/Z-axis linkage of the manipulator of the cladding equipment and the spherical crown are fixed.
3) And polishing the laser cladding layer after the laser cladding is completed.
The alloy powder is preferably one or more of nickel-based, cobalt-based and iron-based self-fluxing alloy powders. For example, ni20 powder, ni60 powder, in625 powder, co06 powder, co40 powder, fe01 powder, fe06 powder or Fe31 powder may be used.
In the following examples, the alloy powders used all meet: the granularity is 20-120 mu m, and the loose density is more than or equal to 3.0g/cm 3 The fluidity is less than or equal to 30s/50g.
Reference is made to the foregoing for any point in the following examples that is not specifically described.
Example 1
Forming a cladding alloy layer on the concave spherical surface of the base, wherein the steps comprise:
1) The alloy powder is nickel-based self-fluxing alloy powder (Ni 20 powder), and the alloy powder is baked in advance at 120 ℃ for 40min;
2) Laser cladding the alloy powder on the concave spherical surface in a high-speed laser cladding device;
the technological conditions of laser cladding include: controlling the protective air flow to 15L/min, the powder gas flow of the alloy powder to 2L/min, the preset power of the laser to 10000W, and controlling the power of the laser to gradually increase from 20% to 90% of the preset power at the rate of 2000W/h; the powder feeding amount of the alloy powder is gradually increased from 1.5g/min to 75g/min, and the increasing rate is 18g per hour; in the cladding process, the cladding height is ensured to be 15-20 mm; the scanning rate was 5m/min.
The laser cladding adopts a synchronous powder feeding method, and the powder feeding mode adopts a central powder feeding mode;
in the laser cladding process, the cladding path is a straight line.
3) And polishing the laser cladding layer after the laser cladding is completed.
The thickness of the clad alloy layer of this example was 0.8mm.
Experimental results: the profile degree of the cladding alloy layer is less than or equal to 0.2, and the connection strength is more than or equal to 160MPa.
Example 2
Forming a cladding alloy layer on the convex spherical surface of the spherical crown, wherein the steps comprise:
1) The alloy powder is cobalt-based self-fluxing alloy powder (Co 06 powder), and the alloy powder is baked in advance at 140 ℃ for 50min;
2) Laser cladding the alloy powder on the convex spherical surface in a high-speed laser cladding device;
the technological conditions of laser cladding include: controlling the protective air flow to 15L/min, the powder air flow of the alloy powder to 3L/min, the preset power of the laser to 10000W, and controlling the power of the laser to gradually increase from 20% to 90% at the rate of 2000W/h; the powder feeding amount of the alloy powder is gradually increased from 1.5g/min to 75g/min, and the increasing rate is 18g per hour; in the cladding process, the cladding height is ensured to be 15-20 mm; the scanning rate was 8m/min.
The laser cladding adopts a synchronous powder feeding method, and the powder feeding mode adopts coaxial powder feeding;
in the laser cladding process, the cladding path is a spiral line.
3) And polishing the laser cladding layer after the laser cladding is completed.
The thickness of the clad alloy layer of this example was 1.0mm.
Experimental results: the profile degree of the cladding alloy layer is less than or equal to 0.2, and the connection strength is more than or equal to 160MPa.
Example 3
Forming a cladding alloy layer on the convex spherical surface of the spherical crown, wherein the steps comprise:
this example was carried out with reference to example 2, the main difference being that the alloy powder used was an iron-based self-fluxing alloy powder (Fe 06 powder).
Experimental results: the profile degree of the cladding alloy layer is less than or equal to 0.2, and the connection strength is more than or equal to 160Mpa.
Comparative example 1
The process is performed with reference to example 1, except that the power of the laser is controlled to be gradually increased from 10% of the preset power to 80% of the preset power.
Experimental results: the profile degree of the cladding alloy layer is more than or equal to 0.25, and the connection strength is less than or equal to 155Mpa.
Comparative example 2
The process was carried out in accordance with example 1, except that the powder feed amount of the alloy powder was gradually increased from 1g/min to 50g/min at a rate of 25 g/hr.
Experimental results: the profile degree of the cladding alloy layer is more than or equal to 0.3, and the connection strength is less than or equal to 150Mpa.
It will be readily appreciated that the above embodiments are merely examples given for clarity of illustration and are not meant to limit the invention thereto. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (10)

1. The preparation method of the cladding alloy layer on the concave spherical surface and the convex spherical surface is characterized in that the concave spherical surface and the convex spherical surface are matched with each other, a cladding alloy layer is formed on the matching surface of the concave spherical surface matched with the convex spherical surface and/or on the matching surface of the convex spherical surface matched with the concave spherical surface, and the preparation steps of the cladding alloy layer comprise:
laser cladding alloy powder on a matching surface needing to form a cladding alloy layer through a high-speed laser cladding device so as to form the cladding alloy layer on the matching surface; then polishing the cladding alloy layer;
in the laser cladding process, controlling the protective air flow to be 2-20L/min, the powder feeding air flow of the alloy powder to be 1-3L/min, and controlling the power of laser to be gradually increased from 20% of preset power to 90% of preset power, wherein the powder feeding amount of the alloy powder is gradually increased from 1.5g/min to 75g/min; the cladding height is controlled to be 15-25mm.
2. The method of claim 1, wherein the laser has a preset power of 6000-12000W, and the laser power is gradually increased from 20% of the preset power to 90% of the preset power at a rate of 1200-2400W/h;
the powder feeding amount of the alloy powder is gradually increased from 1.5g/min to 75g/min at the rate of 15-20 g/h.
3. The method of claim 1, wherein the laser cladding is performed using a linear or spiral cladding path.
4. A method of manufacturing according to any one of claims 1-3, characterized in that during laser cladding the speed of the horizontal turntable of the high speed laser cladding apparatus is adjusted to keep the feed speed constant.
5. A method according to any one of claims 1 to 3, wherein the alloy powder has a particle size of 20 μm to 120 μm and a bulk density of 3.0g/cm or more 3 The fluidity is less than or equal to 30s/50g;
preferably, the alloy powder is previously subjected to a baking treatment, and the conditions of the baking treatment include: the temperature is 100-150deg.C, and the time is 30-60min.
6. A method of preparing as claimed in any one of claims 1 to 3 wherein the alloy powder is selected from one or more of nickel-based, cobalt-based, iron-based self-fluxing alloy powders.
7. A method of manufacture according to any one of claims 1 to 3, wherein the laser cladding is performed by a preset powder method or a simultaneous powder feeding method;
preferably, the laser cladding powder feeding mode adopts center powder feeding or coaxial powder feeding.
8. A method of producing according to any one of claims 1 to 3, wherein the thickness of the clad alloy layer is 0.8 to 1.2mm.
9. A method of manufacturing according to any one of claims 1 to 3 wherein the concave and convex spherical surfaces are co-operating surfaces in a bridge or building support, wherein the convex spherical surface is derived from a spherical cap in the support and the concave spherical surface is derived from a base co-operating with the spherical cap.
10. A bridge or building support, the support comprises a spherical crown and a base matched with the spherical crown, wherein the spherical crown at least comprises a convex spherical surface, and a concave spherical surface matched with the convex spherical surface is formed on the base matched with the convex spherical surface; characterized in that the convex spherical surface and/or the concave spherical surface is formed with a clad alloy layer formed by the production method according to any one of claims 1 to 9.
CN202310556601.XA 2023-05-17 2023-05-17 Preparation method of cladding alloy layer on concave and convex spherical matching surfaces and support Pending CN116555755A (en)

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