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Metal in-situ statistical-distribution analysis method

A technology of statistical distribution and analysis method, which is applied in the field of material analysis, can solve the problems of unable to analyze the distribution of elements and inclusions, unable to record the position of a single discharge, unable to observe abnormal sparks, etc., to avoid errors, strong practicability, Quantitatively Accurate Effects

Inactive Publication Date: 2002-10-23
NCS TESTING TECH
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Problems solved by technology

During the analysis process, the sample is kept fixed, and only a spot with a diameter of 5 mm is excited and melted each time. It is a static excitation, and the position of a single discharge cannot be recorded, so that the distribution analysis of elements and inclusions cannot be carried out; 2. Integral detection method
The object of collection is the integral voltage of thousands of discharge pulses, and it is impossible to identify the characteristics of each spark, so it is impossible to analyze the chemical information contained in a single spark discharge; 3. High-energy pre-combustion
After 20 to 30 seconds of pre-combustion, most of the inclusions were re-melted, making it impossible to observe those abnormal sparks reflecting the information of the inclusions

Method used

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Embodiment Construction

[0041] The chemical composition, segregation degree, porosity and inclusion distribution of the three samples are analyzed by using the metal in-situ statistical distribution analysis method of the present invention.

[0042] The three samples are as follows: sample A is ordinary carbon continuous casting slab, in which A1 is the continuous casting slab that has been lightly pressed by rolls after it leaves the continuous casting machine, and A2 is the casting slab that has not been lightly pressed; sample B is a billet of 20MnSi; sample C is a low carbon steel weld metal for ships. Table 1 lists the designed chemical composition of samples A and B steel types during smelting, and sample C is the designed chemical composition of the base metal during smelting.

[0043] The sample is cut from the sample, and the sample is processed into a plane, and a fresh surface is ground with sandpaper or a grinder. The sample is clamped in a continuous excitation synchronous scanning posit...

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Abstract

The metal in-situ statistical distribution analysis method, mainly relates to chemical components and its state analysis of metal amterial, which includes the following steps: exciting light-source system to implement precombustion-free continuous excitation of sample and synchronous scanning location, making excited spectrum become into linear spectrum, collecting and recording spectrum intensity of single spark discharge, statistically analyzing collected and stored spectral line intensities of linear spectrums, using computer to process said data so as to measure the parameters of chemicalcomponent, segregation, looseness and foreign impurity distribution of sample.

Description

technical field [0001] The invention belongs to the field of analyzing materials by means of measuring their physical properties, and mainly relates to the chemical composition and state analysis of metal materials. Background technique [0002] Chemical composition, segregation, surface defects, and content of inclusions are the four most important items in the quality control of steel production. In the prior art, the sulfur printing test is used to test the segregation or distribution of elements in steel, the acid leaching test is used to test the porosity of the center, and the metallographic method is used to test the shape and distribution of inclusions. The above-mentioned traditional methods have complicated procedures and slow analysis speed. , the result cannot be quantified ("Optical Microanalysis" P21-40 Tsinghua University Press by Sun Yeying, 1996.10). [0003] The spark source atomic emission spectrometer in the prior art can analyze the chemical composition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/67
Inventor 王海舟陈吉文杨志军杨新生高宏斌贾云海袁良经
Owner NCS TESTING TECH
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