Ultrahigh-speed laser-induction composite cladding method and device

A laser cladding and ultra-high-speed technology, which is applied in the coating process and coating of metal materials, can solve the problems of many influencing factors, high processing costs, and complicated procedures, achieve high deposition accuracy and deposition efficiency, and ensure stable quality The effect of ensuring uniformity

Active Publication Date: 2020-09-18
武汉飞能达激光技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional laser cladding technology (LC) has the following problems: (1) The deposition efficiency is low and the preparation cost is high; (2) Although the deposition accuracy is higher than the traditional surfacing process, it is different from the physical vapor phase Compared with chemical vapor deposition and other processes, deposition is still relatively low, and subsequent processing costs are high, especially for the preparation of ultra-thin wear-resistant and corrosion-resistant coatings on the surface, as well as coating materials with high hardness and poor machinability. (3) The cladding layer is prone to metallurgical defects. Laser cladding has the characteristics of rapid heating and rapid cooling. The temperature gradient and cooling rate of the molten pool are large, resulting in increased residual stress. Metallurgical defects such as pores, especially when depositing coatings of high hardness and high cracking sensitivity materials have great limitations
However, the electromagnetic assistance in this method needs to be realized through the synergy of the electromagnetic generator installed below the workpiece and the excitation coil installed above the workpiece, which makes the processing process complicated due to numerous influencing factors and complicated procedures, making it difficult to guarantee cladding. effect and quality
In addition, the electromagnetic device in this method only acts on a local position on the surface of the shaft workpiece, resulting in uneven heating of the surface of the workpiece, and frequent rapid cooling and rapid heating cycles during the processing process, resulting in unstable cladding layer forming quality
Especially for high-speed cladding of material coatings with large shaft diameters or large-sized workpieces that are highly sensitive to surface cracking and difficult to process, it is difficult to ensure the forming quality of the cladding layer

Method used

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  • Ultrahigh-speed laser-induction composite cladding method and device

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Embodiment 1

[0092] In this embodiment, ultra-high-speed laser-induction composite cladding is performed on the surface of solid shaft parts. Specifically, a roll with a roll diameter of 245 mm is used as an example for illustration, and it is also applicable to solid shaft parts with other roll diameters.

[0093] This embodiment adopts as figure 2 For the implementation of the device shown, the motion control unit uses a four-axis CNC machine tool. The specific implementation steps include:

[0094] (1) Select Ni60 alloy powder with a particle size of 25 μm to 60 μm as the cladding material, and the base material is high-carbon alloy steel. The workpiece is fixed on the rotary table 11a of the CNC machine tool using a three-jaw chuck 11b, and a grinding machine or Sandpaper is used to polish the area to be clad on the surface of the workpiece to remove surface rust and pollutants, or use laser cleaning equipment to remove surface rust and pollutants;

[0095] (2) A multi-turn annular i...

Embodiment 2

[0100] In this embodiment, ultra-high-speed laser-induction composite cladding is performed on the outer surface of tubular hollow parts. Specifically, a pipe with a diameter of 100 mm and a wall thickness of 8 mm is used as an example for illustration, and it is also applicable to tubular parts with other diameters and wall thicknesses.

[0101] This embodiment adopts as image 3 For the implementation of the device shown, the motion control unit uses a four-axis CNC machine tool. The specific implementation steps include:

[0102] (1) Ni-based alloy-WC cermet composite powder is selected as the cladding material, wherein the Ni alloy is Ni60 alloy powder with a particle size of 25 μm to 60 μm, and the WC is cast WC with a particle size of 20 μm to 50 μm. The two are mixed by mechanical mixing. The base material is ordinary low-carbon steel; the workpiece is fixed on the rotary table 11a of the CNC machine tool with a three-jaw chuck 11b, and the area to be clad on the surfac...

Embodiment 3

[0109] In this embodiment, ultra-high-speed laser-induction composite cladding is performed on the inner surface of the tubular hollow part, and the induction coil is installed inside the workpiece. Specifically, a pipe with a diameter of 200 mm and a wall thickness of 10 mm is used as an example for illustration, and it is also applicable to tubular components with other diameters and wall thicknesses.

[0110] This embodiment adopts as Figure 4 For the implementation of the device shown, the motion control unit uses a four-axis CNC machine tool. The specific implementation steps include:

[0111] (1) Select Co-based alloy-WC cermet composite powder as the cladding material, wherein the Co-based alloy is Stellite12 alloy powder with a particle size of 25 μm to 60 μm, and the WC is cast WC with a particle size of 20 μm to 50 μm. The two are mixed by mechanical mixing , the base material is ordinary low-carbon steel; use a three-jaw chuck to fix the workpiece on the CNC machi...

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Abstract

The invention belongs to the field of surface coating processing, and particularly discloses an ultrahigh-speed laser-induction composite cladding method and device. Aiming at a workpiece to be cladded as a processing object, the ultrahigh-speed laser-induction composite cladding device is provided with an induction heating coil used for realizing the fact of preheating the workpiece, the induction heating coil is arranged nearby the workpiece to be cladded, a area to be cladded of the workpiece is heated to a set temperature through the shape of the induction heating coil and the spatial arrangement of the induction heating coil relative to the workpiece to be cladded; and carrying out ultrahigh-speed laser-induction composite cladding above the area to be cladded of the workpiece by adopting ultrahigh-speed laser cladding and induction heating modes, so that interaction effect between a laser beam spot and a powder beam flow is carried out at a target position of a cladding area to heat a alloy powder to a molten drop or semi-molten drop state, and the alloy powder is sprayed to a micro molten pool on the preheated surface of the workpiece in a liquid or semi-solid form so as toprepare a required cladding layer. By means of the ultrahigh-speed laser-induction composite cladding method and device, high-precision, high-performance and metallurgical-defect-free ultra-efficientdeposition of the metal cladding layers of various materials can be achieved on the surface of a metal component.

Description

technical field [0001] The invention belongs to the technical field of surface coating processing, and more specifically relates to an ultra-high-speed laser-induction composite cladding method and device. Background technique [0002] As an advanced surface coating technology, laser cladding can prepare a high-performance coating on the surface of metal materials that is metallurgically bonded to the substrate, has a low dilution rate, and has a dense structure. Therefore, it has been widely used in the field of surface strengthening and repair of metal components. Applications. However, the traditional laser cladding technology (LC) has the following problems: (1) The deposition efficiency is low and the preparation cost is high; (2) Although the deposition accuracy is higher than the traditional surfacing process, it is different from the physical vapor phase Compared with chemical vapor deposition and other processes, deposition is still relatively low, and subsequent p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103Y02P10/25
Inventor 曾晓雁孟丽胡乾午王邓志郭平华许晓明
Owner 武汉飞能达激光技术有限公司
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