CN105784676A - Method for detecting trace amount of nitrogen in gray pig iron - Google Patents
Method for detecting trace amount of nitrogen in gray pig iron Download PDFInfo
- Publication number
- CN105784676A CN105784676A CN201610132855.9A CN201610132855A CN105784676A CN 105784676 A CN105784676 A CN 105784676A CN 201610132855 A CN201610132855 A CN 201610132855A CN 105784676 A CN105784676 A CN 105784676A
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- CN
- China
- Prior art keywords
- nitrogen
- sample
- pig iron
- trace amount
- gray pig
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/66—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence
- G01N21/67—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence using electric arcs or discharges
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- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a method for detecting the trace amount of nitrogen in gray pig iron.The method includes the steps that a gray pig iron sample is subjected to quenching heat treatment, wherein the gray pig iron sample is heated to be at 750 DEG C, subjected to heat preservation for 3 hours, then taken out and cooled with water, the surface structure of the sample is changed to be in the half-white state, and then the sample is cut, polished and smoothened; spectral analysis is carried out immediately through a spark-source atomic emission spectrometer, wherein the parameters of the instrument include the nitrogen analysis wavelength of 149.270 nm, the argon washing time of 2 s, the pre-burning time of 10 s and the integral time of 13 s; detection is carried out to obtain the content of the trace amount of nitrogen.The detecting method is a method for rapidly and accurately measuring the trace amount of nitrogen elements in gray pig iron.
Description
Technical field
The present invention relates to the detection method of a kind of metal material, particularly relate to the detection method of a kind of trace element.
Background technology
According to existing national standard, in casting pig the mensuration of nitrogen content depend on oxygen nitrogen combined measuring instrument utilize inert gas fusion thermal conductivity method be analyzed measure, the method precision is higher, but analytical cycle length (>=10min), cost are high, constrain the progress of the whole analysis process of enterprise implement.
Summary of the invention
The technical problem to be solved is to provide for a kind of measuring the method for trace nitrogen element in casting pig quickly and accurately.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is as follows:
A kind of detect the method for trace nitrogen in casting pig, the steps include:
A. prepared by sample: first casting pig sample is carried out quenching heat treatment: be heated to 750 DEG C, water-cooled of coming out of the stove after insulation in 3 hours, changes specimen surface and is organized as half air chill state, sample carries out cutting and polishing subsequently and smooth；
B. immediately use spark source atomic emission spectrometer carry out spectrum analysis, instrument parameter select as follows: nitrogen analysis line wavelength selection 149.270nm, argon cleaning time 2s, prespark period 10s, the time of integration 13s；Detection obtains the content of trace nitrogen.
The present invention uses spark source atomic emission spectrometer to carry out spectrum analysis dexterously, the method rationally, science and efficiently.
1. the method for the present invention is simpler, in hgher efficiency compared to the operation of the relevant test method of existing national Specification, analysis cost is lower；
2. the method for the present invention can carry out with the test of other chemical elements in casting pig when test simultaneously, is particularly suitable for both analysis；
3. traditional inert gas fusion thermal conductivity method test needs to use the conjuncted analyser of nitrogen-hydrogen-oxygen, price is costly, and the method for the present invention uses the spark source atomic emission spectrometer that laboratory is more popular, it is a kind of more economic, feasible method of testing for laboratory.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below.
Fig. 1 is that the present invention detects the schematic flow sheet of the method for trace nitrogen in casting pig.
Detailed description of the invention
A kind of detect the method for trace nitrogen in casting pig, the steps include:
A. prepared by sample: first casting pig sample is carried out quenching heat treatment: be heated to 750 DEG C, water-cooled of coming out of the stove after insulation in 3 hours, changes specimen surface and is organized as half air chill state, sample carries out cutting and polishing subsequently and smooth；
B. immediately use spark source atomic emission spectrometer carry out spectrum analysis, instrument parameter select as follows: nitrogen analysis line wavelength selection 149.270nm, argon cleaning time 2s, prespark period 10s, the time of integration 13s；Detection obtains the content of trace nitrogen.
Thus measuring the content of trace nitrogen element in casting pig quickly and accurately.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.
Claims (1)
1. one kind is detected the method for trace nitrogen in casting pig, it is characterised in that step is:
A. prepared by sample: first casting pig sample is carried out quenching heat treatment: be heated to 750 DEG C, water-cooled of coming out of the stove after insulation in 3 hours, changes specimen surface and is organized as half air chill state, sample carries out cutting and polishing subsequently and smooth；
B. immediately use spark source atomic emission spectrometer carry out spectrum analysis, instrument parameter select as follows: nitrogen analysis line wavelength selection 149.270nm, argon cleaning time 2s, prespark period 10s, the time of integration 13s；Detection obtains the content of trace nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610132855.9A CN105784676A (en) | 2016-03-09 | 2016-03-09 | Method for detecting trace amount of nitrogen in gray pig iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610132855.9A CN105784676A (en) | 2016-03-09 | 2016-03-09 | Method for detecting trace amount of nitrogen in gray pig iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105784676A true CN105784676A (en) | 2016-07-20 |
Family
ID=56387445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610132855.9A Pending CN105784676A (en) | 2016-03-09 | 2016-03-09 | Method for detecting trace amount of nitrogen in gray pig iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105784676A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546574A (en) * | 2016-10-28 | 2017-03-29 | 山西太钢不锈钢股份有限公司 | The spectrum analyses and bearing calibration of trace nitrogen in a kind of steel |
-
2016
- 2016-03-09 CN CN201610132855.9A patent/CN105784676A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546574A (en) * | 2016-10-28 | 2017-03-29 | 山西太钢不锈钢股份有限公司 | The spectrum analyses and bearing calibration of trace nitrogen in a kind of steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160720 |
|
| WD01 | Invention patent application deemed withdrawn after publication |