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A high-temperature speckle fabrication method based on plasma spraying

A production method and plasma technology, applied in coating, fusion spraying, metal material coating process, etc., can solve problems such as inability to perform correlation calculation, decrease in bonding force, image failure, etc., and achieve high flexibility and thermal deformation. Small, high-quality sprayed surface

Active Publication Date: 2016-08-17
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, black and white high-temperature paint is used to spray specimens to make speckles, but the current high-temperature paint can only be used below 1500°C. As the temperature rises, the high-temperature paint and the material of the specimen have different expansion coefficients, and the bonding force will decrease. drop, different degrees of deformation or even delamination, and chemical reactions with oxygen and moisture in the air at high temperatures will easily cause discoloration. The images collected by the camera have completely failed and correlation calculations cannot be performed. Therefore, high-temperature paint Not suitable for speckle production in ultra-high temperature environment

Method used

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  • A high-temperature speckle fabrication method based on plasma spraying
  • A high-temperature speckle fabrication method based on plasma spraying
  • A high-temperature speckle fabrication method based on plasma spraying

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Embodiment Construction

[0021] In one embodiment, a high-temperature speckle production method based on plasma spraying, the method includes the following steps:

[0022] Step 1: Specimen pretreatment: choose different pretreatment methods according to the strain of the material; among them, for the specimens with a strain greater than or equal to 30%, the purification treatment is carried out after roughening treatment, and for the specimens with a strain less than 30% Parts are purified;

[0023] Step 2: Make a spray template: make a spray template that completely covers the test piece according to the size of the test piece;

[0024] Step 3: Spray the test piece: use the prepared spray template to wrap the pretreated test piece tightly, and use the plasma spraying process to spray the test piece;

[0025] Step 4: Post-treatment of the test piece: After the spraying is completed, the sprayed test piece is cooled.

[0026] In this embodiment, the pretreatment of the specimen is an important part o...

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Abstract

The invention discloses a high-temperature speckle manufacturing method based on plasma spraying, which comprises the following steps: pretreating a sample, manufacturing a spraying template, spraying the sample, and carrying out after-treatment on the sample. The speckle manufactured by the method can be used in a hyperthermal environment of 2000-3000 DEG C, has the characteristics of high temperature resistance, high binding property, no decolorization, uniform thickness and high image contrast, and is convenient for the camera to acquire the speckle images, thereby providing computational data for sample strain measurement in the hyperthermal environment of 2000-3000 DEG C by a digital image correlation process.

Description

technical field [0001] The invention relates to a method for manufacturing artificial speckle, in particular to a method for manufacturing high-temperature speckle based on plasma spraying. Background technique [0002] The research on 3D strain measurement based on digital image correlation method in normal temperature environment is becoming more and more mature and widely used in the field of practical engineering, while the research on 3D measurement analysis in ultrahigh temperature environment is mostly in the exploratory stage. The speckle image is the analysis object of measuring the high temperature strain of the specimen based on the digital image correlation method, and the quality of the speckle image on the specimen surface directly affects the accuracy of the subsequent strain measurement. [0003] At present, black and white high-temperature paint is used to spray test pieces to make high-temperature speckles. However, the current high-temperature paint can on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/06
CPCC23C4/02
Inventor 梁晋郭楠胡浩王立忠魏斌千勃兴
Owner XI AN JIAOTONG UNIV
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