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A method of laser-assisted explosive spraying

An explosive spraying and laser-assisted technology, applied in the field of functional coatings for engines, can solve the problems of prone to cracks and holes, poor thermal shock resistance and peeling of high-performance coating materials, and achieve good densification treatment.

Active Publication Date: 2021-07-16
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the laser remelting thermal spraying technology has the following problems: (1) The thermal shock resistance and toughness of high-performance coating materials are poor, and the rapid heating and cooling in the laser remelting process are prone to cracks; (2) the rapid heating makes the coating (3) The compatibility between the coating material and the matrix material is poor, and the molten metal cannot infiltrate the solid ceramic powder well and is prone to cracks and holes, and the coating material with low thermal conductivity Easy to peel off due to localized heating
Therefore, cracks, holes and coating peeling are the main problems in laser remelted thermal sprayed coatings

Method used

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  • A method of laser-assisted explosive spraying
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Fix the laser head of a 2KW semiconductor fiber laser with a wavelength of 808nm and a CCDS2000 explosion spray gun with a muzzle diameter of 16mm on the integrated clamping tool. Adjust the fixed axis of the laser head and the fixed axis of the explosive spray gun so that the axis of the laser beam and the axis of the explosive spray gun intersect at a distance of 100 mm from the mouth of the explosive spray gun. The angle between the axis of the laser beam and the axis of the explosive spray gun is 60°. Adjust the laser head to focus the laser The spot is approximately 16mm in diameter and is 100mm outside the blast muzzle. The integrated clamping tooling, together with the laser head and the explosive spray gun, are installed on the 6-axis manipulator. The manipulator walks the plane spraying program by point positioning. The distance between each point is 8mm, and the manipulator walks at a speed of 600mm / s. Every time it moves to a set point, Stay for 4.99S, set th...

Embodiment 2

[0038] Fix the laser head of the 6KW semiconductor fiber laser with a wavelength of 1060nm and the CCDS2000 explosion spray gun with a muzzle diameter of 20mm on the integrated clamping tool. Adjust the fixed axis of the laser head and the fixed axis of the explosive spray gun so that the axis of the laser beam and the axis of the explosive spray gun intersect at a distance of 150 mm from the mouth of the explosive spray gun. The angle between the axis of the laser beam and the axis of the explosive spray gun is 45°. Adjust the laser head to focus the laser The spot is approximately 20mm in diameter and is 150mm outside the blast muzzle. The integrated clamping tooling, together with the laser head and the explosive spray gun, are installed on the 6-axis manipulator. The manipulator walking plane spraying program is set by point positioning. The distance between each point is 10mm, and the manipulator walking speed is 600mm / s. Every time it moves to a set point, Stay for 3.99S...

Embodiment 3

[0040] Fix the laser head of the 6KW semiconductor fiber laser with a wavelength of 1060nm and the CCDS2000 explosion spray gun with a muzzle diameter of 26mm on the integrated clamping tool. Adjust the fixed axis of the laser head and the fixed axis of the explosion spray gun so that the axis of the laser beam and the axis of the explosion spray gun intersect at a distance of 200mm from the mouth of the explosion spray gun. The angle between the axis of the laser beam and the axis of the explosion spray gun is 45°. Adjust the laser head to focus the laser The spot is approximately 26mm in diameter and is 200mm outside the blast muzzle. The comprehensive clamping tooling, together with the laser head and the explosive spray gun, are installed on the 6-axis manipulator. The manipulator walking plane spraying program is set by point positioning. The distance between each point is 13mm, and the manipulator walking speed is 600mm / s. Every time it moves to a set point, Stay for 3.9...

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Abstract

The invention belongs to the technical field of preparing functional coatings for engines, and in particular relates to a laser-assisted explosive spraying method. It includes the following steps: fix the semiconductor fiber laser and the explosive spray gun on the manipulator with a comprehensive clamping tool, and adjust the fixed axis of the laser head and the explosive spray gun so that the laser spot is focused on a place 100mm‑300mm away from the muzzle along the axis of the explosive spray gun . The included angle between the axis of the laser light path and the axis of the barrel of the explosive spray gun is less than or equal to 60°. Load the powder to be sprayed into the detonation spray powder feeder. Set the path of the manipulator, and start spraying at the same time as the manipulator inputs the walking signal. The laser beam and the sprayed coating act on the substrate at the same time. The spraying is pulsed, the frequency is 0.05S / gun‑5S / gun, the laser beam continues to act, and the number of repetitions Depending on the size of the treatment area and the coating thickness to be achieved, both beam and detonation spraying end at the end of the stroke.

Description

technical field [0001] The invention belongs to the technical field of preparing functional coatings for engines, and in particular relates to a laser-assisted explosive spraying method. Background technique [0002] Thermal spraying technology is a process in which the coating material is sent into a heat source to melt, and the molten particles are sprayed onto the surface of the substrate material by high-speed airflow to form a layered structure covering layer. It has the advantages of fast deposition speed, high productivity and wide application range. However, the thermal spray coating is non-metallurgically bonded to the substrate, which affects the durability of the coating under extreme service conditions. However, the laser cladding coating and the base material are metallurgically bonded and have a relatively small thermal impact on the base material. The metallurgical quality of the coating is relatively high and the dilution rate is relatively low. The disadvant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/126C23C24/10
CPCC23C24/10C23C4/126
Inventor 王长亮高俊国崔永静张昂
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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