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Method for identifying true and false metal by ultrasonic non-destructive detection method

A non-destructive detection and metal technology, which is applied in the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, etc., can solve the problems of metal product damage, complexity, and complex chemical methods, and achieve low cost, simple identification methods, and accurate and reasonable identification results.

Inactive Publication Date: 2013-11-27
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Chemical methods are relatively complicated and chemical reactions occur during identification, which can damage metal products
[0010] In addition, the above-mentioned traditional identification methods usually require the cooperation of several methods to identify them, which is relatively complicated.

Method used

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  • Method for identifying true and false metal by ultrasonic non-destructive detection method
  • Method for identifying true and false metal by ultrasonic non-destructive detection method
  • Method for identifying true and false metal by ultrasonic non-destructive detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Taking stainless iron metal products as an example, the method of using ultrasonic non-destructive detection to identify the authenticity of metal consists of the following steps:

[0024] (1) Polish the upper and lower surfaces of the rectangular stainless iron reference sample with a thickness of 30 mm and rinse it with clean water.

[0025] (2) Fix the transceiver probe with a frequency of 5MHz on the upper surface of the above-mentioned stainless iron reference sample, transmit a pulse signal with a frequency of 5MHz and collect the bottom surface reflection signal of the stainless iron reference sample. In this embodiment, a commercially available The 5077PR pulse transmitter receiver and Puyuan RIGOL DS1052E digital oscilloscope process the collected reflection signals and send them to the computer for further processing, and use conventional calculation methods to calculate the corresponding acoustic parameters of the stainless steel reference sample, namely sound...

Embodiment 2

[0042] In step (2) and step (3), a transceiver probe with a frequency of 2.5MHz is used to collect the bottom reflection signals of the stainless iron reference sample and the sample to be tested, and the rest of the operations are the same as in Example 1.

[0043] Other steps are the same as in Example 1.

Embodiment 3

[0045] In step (2) and step (3), a transceiver probe with a frequency of 7.5 MHz is used to collect the bottom surface reflection signals of the stainless iron reference sample and the sample to be tested, and the rest of the operations are the same as in Example 1.

[0046] Other steps are the same as in Example 1.

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Abstract

The invention relates to a method for identifying true and false metal by an ultrasonic non-destructive detection method. The method consists of four steps of pretreating a reference sample, ultrasonically detecting an acoustic parameter of the reference sample, ultrasonically detecting an acoustic parameter of a to-be-tested sample, and contrasting the acoustic parameters of the reference sample and the to-be-tested sample. By the method, true and false property of a metal product can be identified. By the identification method, the metal product does not need to be damaged, injury to the metal product in an identification process is avoided and non-destructive identification is realized. Compared with traditional physical and chemical identification methods, the method can obtain a true-or-false result of the metal through single identification without combination of many methods, is relatively simple, low in cost and accurate and reasonable in identification result, and can identify different metal products which are made of the same material and are obtained under different heat treatment conditions one by one.

Description

technical field [0001] The invention relates to a method for identifying metals, in particular to a method for identifying authenticity of metals using an ultrasonic non-destructive detection method. Background technique [0002] Due to the gradual reduction of global resources, the price of raw materials has been rising all the way in recent years. Some raw material suppliers or metal manufacturers replace higher-priced raw materials with cheaper metal substitutes, or cut corners to produce products that do not meet international standards. Or the metal products specified by buyers, causing major safety accidents. In addition, some people carry out high-level imitation of metal products and ancient cultural relics in order to make huge profits, which makes it difficult to distinguish genuine products from fakes. Therefore, the identification and analysis of metal materials is becoming more and more important. [0003] At present, the commonly used identification methods o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/07G01N29/11G01N29/12
Inventor 贺西平贺升平田彦平张宏普
Owner SHAANXI NORMAL UNIV
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