A device and method for preparing a carbon steel composite pipe

Abstract

This invention provides a carbon steel composite pipe preparation apparatus and method, relating to the field of metal composite material preparation. The preparation apparatus includes a rotating component, an arc welding torch, a first laser generator, and a second laser generator. The rotating component drives the carbon steel to be processed to rotate; the arc welding torch applies an electric arc to the surface of the carbon steel and delivers deposited material to form a molten pool on the surface; the first laser beam is angled relative to the arc welding torch and irradiates the molten pool to control its morphology and solidification behavior; the second laser beam irradiates the surface of the deposited layer formed after the molten pool cools and heat-treats and shapes the deposited layer; the second laser generator, the arc welding torch, and the first laser generator are arranged sequentially along the rotation direction of the rotating component. By using both the first laser beam and the electric arc as heat sources for combined heating, the microstructure and surface quality of the deposited layer are further optimized, significantly improving the production efficiency of the carbon steel composite pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal composite material preparation, in particular to a carbon steel composite pipe preparation device and method. BACKGROUND

[0002] Stainless steel-carbon steel composite pipe, as a kind of pipe material with corrosion resistance and high strength, has been widely used in petrochemical industry, marine engineering and other fields. The existing composite pipe preparation process mainly relies on the welding technology, including submerged arc welding and arc welding, etc. The stainless steel material is deposited on the surface of the carbon steel pipe substrate to form a composite layer. However, the welding method has the problems of low deposition efficiency, large heat input, easy to cause performance degradation of the base material, and long production cycle, which is not conducive to the output of high-quality composite pipe. SUMMARY

[0003] The present application provides a carbon steel composite pipe preparation device, which realizes efficient and stable cladding welding by cooperating the arc welding gun and the first laser generator in the molten pool area. Then the second laser generator is used to perform online shaping treatment on the surface of the deposited layer formed after the molten pool is cooled. The device significantly improves the forming quality and organization density of the carbon steel composite pipe, effectively shortens the production cycle, and solves the problem of low production efficiency caused by dispersed process links and long processing time in the prior art.

[0004] Embodiments of the present application can be implemented as follows: In a first aspect, the present application provides a carbon steel composite pipe preparation device for depositing on the surface of the carbon steel to be processed to form a carbon steel composite pipe. The preparation device comprises: a rotating member for rotating the carbon steel to be processed; an arc welding gun for applying an electric arc to the surface of the carbon steel to be processed and delivering deposition material to form a molten pool area on the surface of the carbon steel to be processed; a first laser generator for emitting a first laser beam, the first laser beam being arranged at an angle between the arc welding gun, and the first laser beam irradiating the molten pool area to regulate the morphology and solidification behavior of the molten pool area; a second laser generator for emitting a second laser beam, the second laser beam irradiating the surface of the deposited layer formed after the molten pool is cooled, and performing heat treatment shaping on the deposited layer; wherein, the second laser generator, the arc welding gun and the first laser generator are arranged in the rotation direction of the rotating member in sequence.

[0005] Optionally, the included angle between the first laser beam and the arc welding gun ranges from 30° to 35°.

[0006] Optionally, the swing amplitude of the second laser beam ranges from 0 to 5 mm.

[0007] Optionally, the carbon steel composite pipe preparation device further comprises a first focusing mirror arranged on the light path of the first laser beam.

[0008] Optionally, the carbon steel composite pipe preparation device further comprises a second focusing mirror arranged on the light path of the second laser beam.

[0009] Optionally, the carbon steel composite pipe preparation device further comprises a galvanometer arranged on the light path of the second laser beam.

[0010] Optionally, the arc welding gun is arranged perpendicularly to the surface of the carbon steel to be processed.

[0011] Optionally, the carbon steel composite pipe preparation device further comprises a support and a driving member, the rotating member is rotationally connected to the support, and the driving member drives the rotating member to rotate.

[0012] Optionally, the carbon steel composite pipe preparation device further comprises two fixed chucks connected to the rotating member, so as to avoid the carbon steel to be processed from shaking during rotation.

[0013] In a second aspect, an embodiment of the present application provides a carbon steel composite pipe preparation method, which comprises the following specific steps: S1, cleaning the surface of the carbon steel to be processed to remove surface impurities; S2, fixing the carbon steel to be processed on the rotating member; S3, arranging the second laser generator, the arc welding gun and the first laser generator in sequence along the rotation direction of the rotating member; S4, adjusting the arc welding gun so that the arc welding gun is perpendicular to the surface of the carbon steel to be processed; S5, adjusting the first laser generator so that the included angle between the first laser beam to be emitted and the arc welding gun ranges from 30° to 35°; S6, controlling the rotating member to rotate, and turning on the arc welding gun, the first laser generator and the second laser generator.

[0014] The carbon steel composite pipe preparation device has the following beneficial effects: the first laser beam and the electric arc are used for composite heating, and the second laser beam is used for remelting the surface of the deposited layer, so as to compensate for the defects of electric arc drift caused by high-speed deposition, further optimize the microstructure and surface quality of the deposited layer, thereby significantly improving the overall performance of the carbon steel composite pipe, and greatly improving the production efficiency of the carbon steel composite pipe.

[0015] The beneficial effects of the carbon steel composite pipe manufacturing method of this invention include: the automated manufacturing of high-quality carbon steel composite pipes is achieved through the sequential arrangement of a second laser generator, an arc welding torch, and a first laser generator. The 30° to 35° angle between the first laser beam and the arc welding torch ensures that the heat input of the first laser beam and the arc complement each other, improving the efficiency and uniformity of heat input and reducing unnecessary heat input. This manufacturing method, by improving the cladding quality and combining it with the heat treatment shaping of the second laser beam, compensates for the arc drift defects caused by high-speed deposition, significantly improving the overall product quality and production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the carbon steel composite pipe manufacturing apparatus provided in this embodiment from a first-view perspective. Figure 2 This is a schematic diagram of the carbon steel composite pipe manufacturing apparatus provided in this embodiment from a second perspective. Figure 3 This is a schematic flowchart of the carbon steel composite pipe preparation method provided in this embodiment.

[0018] Icons: 1-Carbon steel composite pipe preparation device; 2-Carbon steel to be processed; 21-Molten pool zone; 22-Deposit layer; 10-Rotating component; 11-Support; 15-Fixed chuck; 20-Arc welding torch; 23-Welding wire; 25-Arc zone; 31-First laser generator; 310-First laser beam; 311-First focusing lens; 32-Second laser generator; 320-Second laser beam; 321-Second focusing lens; 323-Galvanometer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0023] Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Also, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or connections that allow for communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] It should also be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0026] Existing composite pipe manufacturing processes suffer from problems such as low fusion efficiency, high heat input leading to substrate performance degradation, and long production cycles, which are not conducive to producing high-quality composite pipes.

[0027] This invention provides a carbon steel composite pipe preparation apparatus 1 and preparation method, which can solve the above-mentioned technical problems.

[0028] On the one hand, please refer to Figure 1This invention provides a carbon steel composite pipe preparation device 1, which is used to deposit carbon steel composite pipe on the surface of carbon steel 2 to be processed. The preparation apparatus includes a rotating component 10, an arc welding torch 20, a first laser generator 31, and a second laser generator 32. The rotating component 10 drives the carbon steel 2 to be processed to rotate. The arc welding torch 20 applies an electric arc to the surface of the carbon steel 2 and delivers deposition material to form a molten pool region 21 on the surface of the carbon steel 2. The first laser generator 31 emits a first laser beam 310, which is angled to the arc welding torch 20 and irradiates the molten pool region 21 to control the shape and solidification behavior of the molten pool region 21. The second laser generator 32 emits a second laser beam 320, which irradiates the surface of the deposition layer 22 formed after the molten pool region 21 cools and heat-treats and shapes the deposition layer 22. The second laser generator 32, the arc welding torch 20, and the first laser generator 31 are arranged sequentially along the rotation direction of the rotating component 10.

[0029] By using a combination of laser and electric arc heat sources, the fabrication time of the carbon steel composite pipe is significantly shortened. With increasing deposition rate, arc drift easily occurs under the high-speed movement of the carbon steel 2 being processed, leading to instability in the molten pool zone 21 and poor formation of the deposited layer 22. The second laser beam 320 acts on the surface of the deposited metal layer, achieving remelting of the deposited layer 22 surface, thereby refining the grains and reducing the surface roughness of the deposited layer 22, compensating for the defects caused by arc drift due to high-speed deposition. The synergistic effect of the combined heat source (first laser generator 31 and arc welding torch 20) and the second laser beam 320 not only achieves a highly efficient and high-quality deposition process, but also further optimizes the microstructure and surface quality of the deposited layer 22 by precisely controlling the position and energy distribution of the second laser beam 320, thus significantly improving the overall performance of the carbon steel composite pipe and greatly increasing its production efficiency.

[0030] In this embodiment, the carbon steel 2 to be processed is a cylindrical carbon steel pipe, and the deposition material is stainless steel. By depositing stainless steel on the surface of the carbon steel pipe, the wear resistance and corrosion resistance of the carbon steel are improved.

[0031] Please combine again Figure 1A welding wire 23 is attached to one end of the arc welding torch 20 near the surface of the carbon steel 2 to be processed. The welding wire 23 is fed into the arc zone 25 via a wire feeding mechanism. Due to the high temperature of the arc zone 25, the welding wire 23 is rapidly melted, forming molten droplets. The molten welding wire 23 mixes with the molten carbon steel surface to form a molten pool. The liquid metal in the molten pool flows continuously under the action of the arc, eventually achieving a uniform distribution. As the rotating component 10 rotates, the molten pool gradually moves away from the arc zone 25 and begins to cool. Immediately afterwards, the second laser beam 320 irradiates the deposition area and heat-treats and shapes the deposited layer 22.

[0032] Furthermore, to improve cladding efficiency, the angle between the first laser beam 310 and the arc welding gun 20 ranges from 30° to 35°. Within this angle range, the laser beam and the arc can be used more effectively, resulting in more uniform heat input and thus accelerating the cladding speed without sacrificing quality. In addition, this angle setting helps to distribute the energy of the laser (first laser beam) and the arc evenly on the workpiece surface, improving the stability and consistency of the cladding process.

[0033] Furthermore, the swing amplitude of the second laser beam 320 is in the range of 0 to 5 mm.

[0034] As the deposited layer 22 cools naturally, unevenness and defects (i.e., poor forming) may appear. During operation, molten material is deposited on the workpiece under the action of the first laser beam and the arc welding gun 20, forming the deposited layer 22. As the rotating component 10 drives the carbon steel 2 to be processed to rotate, the deposited layer 22 begins to cool and solidify. During the cooling process, unevenness or defects may appear in the deposited layer 22. The second laser beam 320 moves along a zigzag path under the combined displacement of the rotation of the rotating component 10 and its own oscillation amplitude, performing uniform heat treatment on the surface of the deposited layer 22, eliminating unevenness and defects in the deposited layer 22, and improving surface quality.

[0035] In other embodiments, the second laser beam 320 can work in conjunction with other optical components to perform thermal scanning of the deposited layer 22. The scanning path is not limited to a zigzag pattern, but can be flexibly selected according to the specific area of ​​the deposited layer 22 and product quality requirements. These paths can include, but are not limited to, spiral, straight, and grid patterns, etc. The specific path selection will be adjusted according to actual application requirements to ensure the best heat treatment effect.

[0036] Furthermore, the carbon steel composite pipe manufacturing apparatus 1 also includes a first focusing mirror 311, which is disposed in the optical path of the first laser beam 310. The first focusing mirror 311 focuses the first laser beam 310 into a smaller area, significantly improving the energy density of the laser. The high-energy-density laser beam can rapidly heat the surface of the workpiece in a short time, accelerate the deposition rate of molten material, and improve production efficiency.

[0037] It is easy to understand that the focal point and size of the laser beam can be precisely controlled by adjusting the focusing lens, thereby forming a more uniform and stable molten pool. This helps to reduce the probability of porosity and other defects, and improve the quality of the cladding layer.

[0038] Furthermore, in order to enhance metallurgical bonding and improve adhesion, the carbon steel composite pipe preparation device 1 also includes a second focusing mirror 321, which is disposed in the optical path of the second laser beam 320.

[0039] Similar to the function of the first focusing lens, the second focusing lens 321 is primarily designed to increase the energy density of the second laser beam 320. A high-energy-density laser beam helps promote the recrystallization process of the deposited layer 22, improving the uniformity and density of its microstructure. Furthermore, through heat treatment, the metallurgical bond between the deposited layer 22 and the substrate (carbon steel pipe) is strengthened, enhancing the adhesion and durability of the cladding layer (stainless steel material).

[0040] Furthermore, to improve the accuracy of thermal scanning, the carbon steel composite tube preparation apparatus 1 also includes a galvanometer 323, which is positioned in the optical path of the second laser beam 320. The galvanometer 323 can achieve high-precision laser beam positioning, ensuring that the focal position of the second laser beam 320 on the surface of the deposition layer 22 is precisely controllable, thereby improving the uniformity and consistency of the heat treatment.

[0041] Since the galvanometer 323 can quickly change the direction of the laser beam to achieve multi-directional scanning, it helps the second laser beam 320 to form complex scanning paths on the surface of the deposition layer 22, such as serpentine paths and spiral paths.

[0042] Furthermore, to concentrate the heat source, the arc welding torch 20 is positioned perpendicular to the surface of the carbon steel 2 to be processed. This vertically positioned torch allows the arc heat source to act more concentratedly on the surface being processed, improving heat input efficiency, which in turn helps to rapidly melt the material, reduce the heat-affected zone, and increase welding speed.

[0043] Further, please refer to Figure 2 The carbon steel composite pipe manufacturing apparatus 1 also includes a support 11 and a driving component. The rotating component 10 is rotatably connected to the support 11, and the driving component drives the rotating component 10 to rotate. The support 11 provides support and fixation for other components, ensuring the stability and reliability of the entire apparatus. The continuous rotation of the rotating component 10 allows the first laser beam 310 and the electric arc to act uniformly on the surface of the carbon steel pipe, ensuring a uniform distribution of heat input.

[0044] Furthermore, the carbon steel composite pipe preparation device 1 also includes two fixed chucks 15, which are connected to the rotating component 10 to prevent the carbon steel 2 to be processed from shaking during rotation. The two fixed chucks 15 are respectively installed at both ends of the rotating component 10, which can firmly clamp the carbon steel pipe and prevent it from shaking or shifting during rotation, thereby improving the processing accuracy.

[0045] In summary, the carbon steel composite pipe preparation apparatus 1 provided in this embodiment of the invention uses a combination of two heat sources, a first laser beam 310 and an electric arc, for combined heating, and utilizes a second laser beam 320 to remelt the surface of the deposited layer 22. This further optimizes the microstructure and surface quality of the deposited layer 22, compensates for the defects caused by arc drift due to high-speed deposition, thereby significantly improving the overall performance of the carbon steel composite pipe and greatly increasing its production efficiency.

[0046] On the other hand, please refer to Figure 3 This invention provides a method for preparing carbon steel composite pipes, which includes the following specific steps: S1, Clean the surface of the carbon steel 2 to be processed and remove surface debris; S2, Fix the carbon steel 2 to be processed onto the rotating part 10; S3, The second laser generator 32, the arc welding gun 20 and the first laser generator 31 are arranged sequentially along the rotation direction of the rotating part 10; S4, Adjust the arc welding gun 20 so that it is perpendicular to the surface of the carbon steel 2 to be processed; S5, Adjust the first laser generator 31 so that the angle between the first laser beam 310 to be emitted and the arc welding gun 20 is within the range of 30° to 35°; S6, control the rotating part 10 to rotate, and turn on the arc welding gun 20, the first laser generator 31 and the second laser generator 32.

[0047] This manufacturing method achieves automated production of high-quality carbon steel composite pipes through the sequential arrangement of a second laser generator 32, an arc welding torch 20, and a first laser generator 31. The 30° to 35° angle between the first laser beam 310 and the arc welding torch 20 ensures that the heat input of the first laser beam 310 and the arc complement each other, improving the efficiency and uniformity of heat input and reducing unnecessary heat input. By improving the cladding quality and combining it with the heat treatment shaping of the second laser beam 320, this method compensates for the arc drift defects caused by high-speed deposition, significantly improving the overall product quality and production efficiency.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A carbon steel composite pipe preparation apparatus, used for depositing carbon steel composite pipe on the surface of carbon steel (2) to be processed, characterized in that, include: Rotating component (10), the rotating component (10) is used to drive the carbon steel (2) to be processed to rotate; Arc welding gun (20), which is used to apply an electric arc to the surface of the carbon steel (2) to be processed and deliver deposited material to form a molten pool area (21) on the surface of the carbon steel (2). A first laser generator (31) is used to emit a first laser beam (310). The first laser beam (310) is set at an angle to the arc welding gun (20). The first laser beam (310) irradiates the molten pool area (21) to regulate the shape and solidification behavior of the molten pool area (21). A second laser generator (32) is used to emit a second laser beam (320), which is used to irradiate the surface of the deposited layer (22) formed after the molten pool region (21) has cooled, and to heat-treat and shape the deposited layer (22); wherein, The second laser generator (32), the arc welding gun (20) and the first laser generator (31) are arranged sequentially along the rotation direction of the rotating component (10).

2. The carbon steel composite pipe preparation apparatus according to claim 1, characterized in that, The angle between the first laser beam (310) and the arc welding gun (20) is in the range of 30° to 35°.

3. The carbon steel composite pipe manufacturing apparatus according to claim 1, characterized in that, The swing amplitude of the second laser beam (320) is in the range of 0 to 5 mm.

4. The carbon steel composite pipe manufacturing apparatus according to claim 1, characterized in that, The carbon steel composite pipe preparation device (1) further includes a first focusing lens (311), which is disposed in the optical path of the first laser beam (310).

5. The carbon steel composite pipe preparation apparatus according to claim 1, characterized in that, The carbon steel composite pipe preparation device (1) further includes a second focusing mirror (321), which is disposed in the optical path of the second laser beam (320).

6. The carbon steel composite pipe preparation apparatus according to claim 5, characterized in that, The carbon steel composite pipe preparation device (1) also includes a galvanometer (323), which is arranged in the optical path of the second laser beam (320).

7. The carbon steel composite pipe manufacturing apparatus according to claim 1, characterized in that, The arc welding gun (20) is set perpendicular to the surface of the carbon steel (2) to be processed.

8. The carbon steel composite pipe manufacturing apparatus according to claim 1, characterized in that, The carbon steel composite pipe preparation device (1) further includes a support (11) and a driving component. The rotating component (10) is rotatably connected to the support (11), and the driving component drives the rotating component (10) to rotate.

9. The carbon steel composite pipe manufacturing apparatus according to claim 1, characterized in that, The carbon steel composite pipe preparation device (1) also includes two fixed chucks (15), which are connected to the rotating component (10) to prevent the carbon steel (2) to be processed from shaking during rotation.

10. A method for preparing a carbon steel composite pipe, characterized in that, The specific steps include the following: S1, Clean the surface of the carbon steel (2) to be processed and remove surface impurities; S2, fix the carbon steel (2) to be processed onto the rotating part (10); S3, The second laser generator (32), the arc welding gun (20) and the first laser generator (31) are arranged sequentially along the rotation direction of the rotating component (10); S4, Adjust the arc welding gun (20) so that the arc welding gun (20) is perpendicular to the surface of the carbon steel (2) to be processed; S5, Adjust the first laser generator (31) so that the angle between the first laser beam (310) to be emitted and the arc welding gun (20) is within the range of 30° to 35°; S6, control the rotating part (10) to rotate, and turn on the arc welding gun (20), the first laser generator (31) and the second laser generator (32).

Images