Optimization process-based method for rapidly detecting bonding state of coating interface

A detection method and technology of optimization method, which can be applied to measuring devices, instruments, mechanical devices, etc., can solve the problems of long scratch paths, unusable workpieces, and complicated processing of test results, so as to improve scratch efficiency and reduce damage.

Inactive Publication Date: 2010-11-03
JIANGSU UNIV
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Problems solved by technology

However, the long scratch path produced by this method makes the tested workpiece unusable, and the laser repeatedly loads a single point on the coating surface, making the processing of the test results complicated.

Method used

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  • Optimization process-based method for rapidly detecting bonding state of coating interface
  • Optimization process-based method for rapidly detecting bonding state of coating interface
  • Optimization process-based method for rapidly detecting bonding state of coating interface

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Embodiment Construction

[0060] specific implementation plan

[0061] A martensitic stainless steel sample with a length of 80 mm, a width of 15 mm, and a thickness of 1 mm. The surface of the sample is prepared by a sulfamate nickel plating process with a stainless steel protective coating with a thickness of about 25 μm. Such as figure 2 , image 3As shown, the short-pulse laser beam directly acts on the surface coating of the sample 13 through the laser 1 . The sample 13 is fixed on the fixture 12 of the two-dimensional translation stage 11 ) to make discrete scratches 33 , the power of the laser is adjustable, and the laser and the workbench are uniformly controlled by the industrial computer 26 . The laser starting power is 150MJ-the laser ending power is 1000MJ, adjust the distance between the camera and the sample, and send the collected scratch images to the computer for real-time storage, which is used by the experiment operator for real-time monitoring for manual monitoring40. The core p...

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Abstract

The invention discloses an optimization process-based method for rapidly detecting the bonding state of a coating interface and relates to the technical field of laser detection and material performance detection. The method comprises the following steps of: rapidly obtaining the failed laser density range of a coating by an optimization process; loading the coating point by point respectively by using pulse laser in the range to form dot discrete scratches of which the depths increase gradually; detecting the intensity change of reflected light on laser loading points of the discrete scratches through a power meter; when three continuous inflection points occur in a first recess on the powder density map of a detection point for the first time, considering that the recess is the failure threshold point P1 of the coating; and determining the failure critical point (failure threshold) of the coating by judging the length of a relatively short scratch. The method has the advantages of improving scratch efficiency and reducing damage to the coating through the rapid approach of the failed laser power density range of the coating by the optimization process and through the acquisition of the failure threshold by using a coating failure critical point judging process.

Description

technical field [0001] The device of the invention relates to the technical field of laser detection and material performance detection, in particular to a laser scratching device for quickly detecting the bonding strength of a coating interface by using an optimization method, and belongs to the field of optical detection. Background technique [0002] Coating technology is an important advanced technology for surface treatment and material compounding. Its core is to ensure that the coating has good bonding performance with the substrate during the service life. Aiming at the problem of measuring the coating-substrate bonding strength, domestic and foreign scholars have carried out a series of researches, and proposed a variety of bonding strength detection methods such as scratch method, indentation method, and laser spalling method. Stability or large differences in the detection results of different methods. [0003] The laser scratch method combines the advantages of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
Inventor 冯爱新曹宇鹏徐传超孙淮阳
Owner JIANGSU UNIV
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