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A method and device for preparing coating based on laser processing technology

A laser processing and technology technology, applied in the field of parts remanufacturing, can solve the problems of large size disparity of sprayed particles, decrease in coating hardness, uneven coating texture, etc., achieve precise control of heating temperature, offset residual tensile stress, control roughness degree of effect

Active Publication Date: 2018-12-07
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Arc spraying can only spray conductive materials, and fouling occurs at the fusing part of the wire, which makes the sprayed particle size different and the coating texture uneven; in addition, due to the high temperature of the arc heat source, the burning loss of elements is larger than that of flame spraying, which is easy leading to a decrease in the hardness of the coating

Method used

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  • A method and device for preparing coating based on laser processing technology
  • A method and device for preparing coating based on laser processing technology
  • A method and device for preparing coating based on laser processing technology

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Embodiment Construction

[0028] The device of the present invention includes a laser generator 1, a light guiding and focusing system, a control system, a gas storage system, a water spray system, a workpiece clamping system and a wire feeding system. Wherein said light guiding and focusing system comprises total reflection mirror 6, focusing lens 33, base 39, upper fixed plate 32, stud 41, stud 29 with shoulder, the first thin nut 30, the second Thin nut 37, second nut 38, third nut 40, first nut 35, third gasket 31, fourth gasket 34, split nut 36, lead screw 13, motor 27, motor mounting bracket 24, bolt 25 , the second gasket 26 and the motor base 28 . The gas storage system includes a gas storage tank 5 , a gas valve 9 , and an air guide tube 4 . Described sprinkler system is made up of sprinkler head 17, water valve 18 and the water pipe that connects them. The wire feeding system includes a symmetrical wire feeding motor 20 , a speed reducer 19 , a spraying wire 15 , a wire feeding roller 14 an...

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Abstract

The invention discloses a method and device for preparing a coating on the basis of a laser processing technology and belongs to the technical field of part refabrication. The method includes the steps that firstly, the surface of a workpiece is coated with a thin black organic matter layer which serves as a laser energy absorption layer; pulse laser with the power density being GW / cm<2> grade is adopted for irradiating the surface of the workpiece, so that plastic pits are formed in the surface of the workpiece; the treated surface of the workpiece is cleaned and dried; and laser pulse beams with the power density being 10<4>-10<6> W / cm<2> are adopted for irradiating spraying wires and then melting the spraying wires into liquid state, liquid spraying wires are blown by high-pressure protective gas to impact on the surface of the workpiece at a high speed, and the coating is formed. According to the method and the device, an adjustable laser device is adopted, and the laser pulse beam diameter and output energy can be controlled; the coating prepared through the method has the characteristics of being high in interface bonding force and quality; and the method and the device have the technical characteristics of being short in spraying time, low in energy consumption, free of pollution and the like.

Description

Technical field: [0001] The invention belongs to the technical field of parts remanufacturing, and in particular relates to a method and a device for preparing a thermal spray coating based on laser processing technology. The method first adopts the method of laser shock to form micro pits on the surface of the workpiece to be sprayed, and then uses the method of laser melting spraying wire to form a coating on the surface of the workpiece after shock treatment. Using this method improves the bonding strength of the coating and the substrate interface, improves the quality of the coating, and thus greatly prolongs the service life of the workpiece. Background technique: [0002] The coating is a thin layer of substance coated on the surface of the workpiece, which plays the role of heat insulation, corrosion resistance and wear resistance. Various failure modes of thermal spray coatings during use, such as coating delamination, peeling, cracking, etc., are all related to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/123C23C4/02
CPCC23C4/02
Inventor 张兴权李欢李明明李龙童宝宏裴善报时礼平韩蒙蒙
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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