Method for controlling air holes of laser cladding layer by intermittent parking machine

A technology of laser cladding and mechanical vibration, which is applied in coating, metal material coating process, etc., can solve the undiscovered problems of reducing the porosity in the laser cladding layer and eliminating the surface porosity, so as to improve the fluidity , compact microstructure and smooth surface

Inactive Publication Date: 2012-03-21
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

After searching, no method has been found to reduce the porosity in the laser cladding layer and eliminate the surface porosity by using external intermittent resident mechanical vibration

Method used

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  • Method for controlling air holes of laser cladding layer by intermittent parking machine
  • Method for controlling air holes of laser cladding layer by intermittent parking machine
  • Method for controlling air holes of laser cladding layer by intermittent parking machine

Examples

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Embodiment 1

[0020] Embodiment 1: The laser cladding of Ni60CuMoW self-fluxing alloy is carried out on the 45 steel plate substrate with the size of 100mm×40mm×6mm through the method of controlling the pores of the laser cladding layer through the intermittent resident mechanical vibration. The cladding material used is Ni60CuMoW self-fluxing alloy powder with a melting point of 1024 °C and an average particle size of 80 μm (mass percentage components: Cr14~19%, Si3.5~5.0%, B3.0~4.5%, C0.5~1.0% , Fe<8.0%, Cu2~4%, Mo2~4%, W2~3%, the balance Ni).

[0021] see figure 1, the method of intermittently resident mechanical vibration to control the pores of the laser cladding layer is to use the lateral synchronous powder feeding carbon dioxide laser cladding equipment while intermittently resident A Ni60CuMoW alloy cladding layer was prepared on the surface. The specific steps are: first, pretreat the surface of the 45 steel plate matrix 6, clean the surface with acetone, and use the clamp devic...

Embodiment 2

[0024] Example 2: This method of intermittent resident mechanical vibration to control the pores of the laser cladding layer, the cladding material, the process used and the equipment used are all the same as in Example 1. The amplitude of the mechanical vibration is 60 μm, the frequency is 200 Hz, and the intermittent resident The pause-dwell interval of mechanical vibration is 1 second. The macroscopic morphology of the obtained cladding layer is shown in Figure 5 In (b) shown. Microstructures scanned using a scanning electron microscope such as Figure 7 shown.

Embodiment 3

[0025] Example 3: This method of intermittent resident mechanical vibration to control the pores of the laser cladding layer. The cladding materials, process and equipment used are the same as in Example 1. The amplitude of the mechanical vibration is 60 μm, the frequency is 300 Hz, and the intermittent resident The pause-dwell interval of mechanical vibration is 1 second. The macroscopic morphology of the obtained cladding layer is shown in Figure 5 In (c) shown. Microstructures scanned using a scanning electron microscope such as Figure 8 shown.

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Abstract

The invention relates to a method for controlling air holes of a laser cladding layer by an intermittent parking machine, belonging to the technical field of surface treatment. The method comprises the following steps of: fixing a cladding sample on a platform surface of an electromagnetic vibrating platform by a clamp device, adopting a lateral and synchronous powder feeding method, assisting low-amplitude and high-frequency intermittent parking vibration in the laser cladding process, leading metal liquid to be stressed by exciting force provided by mechanical vibration intermittently in the solidification process of a melting pool, and obtaining the high-quality cladding layer. In the method, the formation of a feeding channel can be enhanced, the intermittent vibration accelerates the escaping of residual gas in the cladding process, the residue of microscopic bubbles in the cladding layer is restrained, the macroscopic surface quality after the cladding layer is solidified is improved, the subsequent processing amount is reduced, and the comprehensive surface performance of the cladding layer is improved. The method is applicable to the fields such as strengthening and forming of laser cladding surfaces of metal parts and surface repairing of medium parts and the like, and can improve the quality of the cladding layer.

Description

technical field [0001] The invention relates to a method for intermittently resident mechanical vibration to control pores of a laser cladding layer, belonging to the technical field of surface treatment. Background technique [0002] With the rapid development of laser technology, laser cladding technology has been widely used in the field of surface strengthening of metal materials in the past ten years. Its technical feature is to add the required cladding material on the surface of the substrate, and use high-energy-density laser beams to heat rapidly, so that the cladding material and the surface layer of the substrate are melted at the same time, and the rapid solidification is realized through the chilling action of the substrate, thereby forming the same The substrate exhibits a metallurgically bonded surface composite coating with very low dilution rates. The use of laser cladding to prepare cemented carbide coatings on the surface of materials and parts has receiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 蒋业华刘洪喜王传琦周荣张晓伟
Owner KUNMING UNIV OF SCI & TECH
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