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Correction method for influence of cladding layer thickness on ultrasonic evaluation of cladding layer stress

A cladding layer and ultrasonic technology, which is applied in the field of ultrasonic nondestructive evaluation, can solve the problem of inability to realize online evaluation of cladding layer stress, and achieve the effect of realizing online evaluation and safe online evaluation.

Active Publication Date: 2020-07-31
无锡腾达海川新材料有限公司
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Problems solved by technology

However, this type of method belongs to the category of sampling detection of small samples, and cannot realize the online evaluation of cladding layer stress; the non-destructive evaluation method is based on the premise of not destroying the integrity of the cladding layer, by analyzing the detection signals (such as electricity, magnetism, sound, light, etc.) etc.) to analyze, and then realize a kind of method of non-destructive evaluation of cladding layer stress

Method used

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  • Correction method for influence of cladding layer thickness on ultrasonic evaluation of cladding layer stress

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Embodiment

[0038] Taking the preparation of plasma cladding layer on the surface of low carbon steel as an example, the correction steps of cladding layer thickness affecting ultrasonic evaluation of cladding layer stress are described. The specific process is as follows:

[0039] Step 1: Select a Q235 steel plate with a thickness of 30mm as the substrate, and prepare a substrate sample. Determine the main process parameters of plasma cladding as follows: peak current 220A, base current 140A, frequency 60Hz, duty cycle 50%, cladding The speed is 0.2m / min, and the wire feeding speed is 3.0m / min. Five sets of cladding layers with different thicknesses are prepared on the surface of the substrate. After machining, the thicknesses of the plasma cladding layers are 0.20, 0.25, 0.30, 0.45 and 0.55mm Its surface roughness Ra is 1.0;

[0040]Step 2, according to GB / T2002-228 metal material room temperature tensile test method, prepare a plasma "substrate + cladding layer" cladding layer sample w...

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Abstract

The invention discloses a correction method for influence of cladding layer thickness on ultrasonic evaluation of cladding layer stress, and belongs to the technical field of ultrasonic nondestructiveevaluation and stress evaluation. According to the method, with the help of an ultrasonic probe group in a one-transmitting and two-receiving mode and an ultrasonic acoustic elastic coefficient calibration experiment, corresponding correlation between an ultrasonic acoustic elastic coefficient and the thickness of a cladding layer is established. Based on ultrasonic signal amplitude analysis, ultrasonic nondestructive evaluation of the thickness of the cladding layer is realized, nondestructive evaluation of the ultrasonic coefficient of the cladding layer with any thickness is further realized, and finally correction of the influence of the thickness of the cladding layer on ultrasonic evaluation of the stress of the cladding layer is realized. Technical support is provided for correction of the influence of the cladding layer thickness on ultrasonic evaluation of the cladding layer stress, and the method has the advantages of being free of damage, convenient, safe, capable of achieving online application and the like.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic non-destructive evaluation, and specifically relates to a correction method for cladding layer thickness affecting ultrasonic evaluation of cladding layer stress. Background technique [0002] The remanufacturing industry is an effective measure to develop a circular economy and promote my country's energy conservation and emission reduction. Therefore, it is very important to vigorously develop the remanufacturing industry for my country's economic development and technological transformation. Cladding technology is one of the commonly used technologies in remanufacturing, so how to ensure the quality of the cladding layer is extremely important for the quality assurance of remanufactured products. Relevant studies have shown that stress is one of the key factors affecting the quality of the cladding layer. For this reason, scholars at home and abroad have conducted a lot of theoretical and ex...

Claims

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Application Information

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IPC IPC(8): G01L1/25G01L1/26
CPCG01L1/255G01L1/26
Inventor 王凤江刘彬祁凯
Owner 无锡腾达海川新材料有限公司
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