Instrument analysis method for rapidly determining content of occluded foreign substance in material

An instrumental analysis and rapid determination technology, which is applied in the direction of material excitation analysis, etc., can solve the problems of unsuitable for rapid pre-furnace analysis, small sample volume, and limited analysis ability, so as to reduce the possibility of contamination and large sample capacity , the effect of high analytical sensitivity

Active Publication Date: 2014-04-16
NCS TESTING TECH
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Problems solved by technology

Wet analysis needs to dissolve the sample with acid. The disadvantage of this method is that the sample pretreatment is very cumbersome and the analysis period is long. It is not suitable for fast furnace analysis.
The single spark discharge atomic emission spectrometry uses the abn

Method used

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  • Instrument analysis method for rapidly determining content of occluded foreign substance in material
  • Instrument analysis method for rapidly determining content of occluded foreign substance in material
  • Instrument analysis method for rapidly determining content of occluded foreign substance in material

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Embodiment Construction

[0038] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0039] The analytical method of the present invention adopts the laser-induced spectral scanning analyzer, and this instrument is by Q switch Nd:YAG laser 1, based on Roland circular optical path configuration spectrometer 2, the sample chamber 3 that can fill inert protective gas, the motor 4 that drives sample to move and The pulse delay generator 5 is composed of five parts.

[0040] The analytical principle of analytical method of the present invention is as follows:

[0041] The interaction between laser and matter generates high-temperature plasma. The plasma converges on the concave grating through the focusing lens. The pulse delay generator 5 is used to control the collection of the optical signal, and starts to integrate and collect the optical signal when the signal-to-background ratio is high...

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Abstract

The invention discloses an instrument analysis method for rapidly determining content of an occluded foreign substance in a material. The cleanliness of the material can be evaluated by accurate determination of the content of the occluded foreign substance in the material. The method comprises the following analysis processes: putting a sample into a sample box and placing into a sample chamber (3) charged by an inert protective gas; carrying out surface scanning analysis on the sample under the optimal instrument parameter condition; eliminating an abnormal value of all collected signal in a loop iteration manner according to Nalimov criterion; calculating the mean value and standard deviation of residual data; taking the standard deviation which is three times of the mean value as threshold strength for distinguishing the signal of the occluded foreign substance; building a mathematic model to carry out accurate and quantitative analysis on the content of the occluded foreign substance in the material on the basis of determining the threshold strength. Compared with the traditional wet process and single spark discharge atomic spectral analysis, the method has the advantages of being fast in analysis speed, high in sensitivity and the like, can analyze tiny, shaped and non-conductive material samples, and can be applied to rapid quantitative characterization of the occluded foreign substance content in the material.

Description

technical field [0001] The invention relates to a quantitative analysis method for materials, in particular to an instrumental analysis method for quickly measuring the content of inclusions in materials. Background technique [0002] The inclusions in the material have a great impact on the main properties of the material such as mechanical cutting, surface finish, fracture toughness, and crack formation. For example, inclusions on the surface of plates, bearing steel, and heavy rail steel directly affect the fatigue life of the workpiece and Other performances directly affect the quality of the surface coating for automobile thin plates, for cutting steels, sulfide inclusions have a significant impact on its cutting performance, and for high chromium alloy steels, oxide inclusions affect the surface finish, etc. [0003] In the prior art, methods for analyzing inclusion content in materials include wet analysis and single spark discharge atomic emission spectrometry. Wet ...

Claims

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Application Information

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IPC IPC(8): G01N21/63
Inventor 贾云海陈吉文张勇李冬玲陈永彦杨春韩鹏程
Owner NCS TESTING TECH
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