JPS6337891B2 - - Google Patents
Info
- Publication number
- JPS6337891B2 JPS6337891B2 JP55112652A JP11265280A JPS6337891B2 JP S6337891 B2 JPS6337891 B2 JP S6337891B2 JP 55112652 A JP55112652 A JP 55112652A JP 11265280 A JP11265280 A JP 11265280A JP S6337891 B2 JPS6337891 B2 JP S6337891B2
- Authority
- JP
- Japan
- Prior art keywords
- steel
- inclusions
- sample
- emission
- detection
- 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.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 238000004993 emission spectroscopy Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000000295 emission spectrum Methods 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 claims description 2
- 239000000523 sample Substances 0.000 description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000000275 quality assurance Methods 0.000 description 3
- 238000010924 continuous production Methods 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (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)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Description
【発明の詳細な説明】
この発明は、鋼中に存在する介在物を迅速に検
出する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for rapidly detecting inclusions present in steel.
従来鋼中介在物の成分構成等を直接検出する方
法として例えばEPMA（Ｘ線マイクロアナライザ
ー、Electron Probe Ｘ−ray Micro Analyzer）
による方法が知られている。この方法は、小さな
試験片（サンプル面積25mm×25mm以内）中に存在
する介在物の検出に有効であるが、予め顕微鏡観
察で介在物の存在を確認したあと、前記EPMA
を用いて検出する方法が採られ、ミクロ介在物の
検出に適している。 Conventional methods for directly detecting the composition of inclusions in steel include EPMA (Electron Probe X-ray Micro Analyzer).
A method is known. This method is effective for detecting inclusions present in a small test piece (within a sample area of 25 mm x 25 mm), but after confirming the presence of inclusions by microscopic observation, the EPMA
This method is suitable for detecting micro-inclusions.
しかしながらこのような方法は研究室あるいは
試験室といつたいわばオフ・ライン型の検出方法
であり、一貫製鉄プロセスにおける連続工程中途
での品質保障といつた面でのいわばオン・ライン
型の検出には十分に対応し得ない欠点があつた。 However, this method is an off-line detection method in a laboratory or testing room, and is not suitable for on-line detection in terms of quality assurance in the middle of a continuous process in an integrated steel manufacturing process. There were drawbacks that could not be adequately addressed.
本発明は上述した事態に鑑みてなされたもので
その特徴とするところは、発光分光法を用いて鋼
中介在物の検出を行なうにあたり、鋼試料被検面
を、適宜速度で連続的に検出装置の検出域を順次
通過せしめ、前記被検面における初期放電の高感
度域を発光スペクトルの強度として測定すること
にあり、特別な試験片として切出すことなく、オ
ン・ラインで採取した試料をそのまゝ適用でき、
しかもEPMAのように顕微鏡での予見を必要と
せず、直接試料（被検）面を粗研磨のまゝで介在
物検出を可能とする、発光分光法による鋼中介在
物の検出方法を提供するにある。 The present invention was made in view of the above-mentioned situation, and its characteristics are that when detecting inclusions in steel using emission spectroscopy, the surface of the steel sample to be inspected is continuously detected at an appropriate speed. The purpose is to sequentially pass through the detection area of the device and measure the high-sensitivity region of the initial discharge on the test surface as the intensity of the emission spectrum. Can be applied as is,
Moreover, unlike EPMA, the present invention provides a method for detecting inclusions in steel using emission spectroscopy, which does not require foresight with a microscope and enables inclusions to be detected directly while the surface of the sample (tested) is roughly polished. It is in.
本発明者は、本発明の完成に先立つて種々研究
を重ねた結果、オン・ラインに適用可能な検出方
法を探る根拠として発光分光分析（カントバツク
等）法の手法に着眼したのである。 As a result of various studies conducted prior to the completion of the present invention, the present inventor focused on the method of emission spectrometry (such as Cantback) as a basis for searching for a detection method that can be applied online.
いわゆる発光分光分析法は、従来より鉄鋼業の
品質管理、品質保障等を目的として広く用いられ
ている。この方法は点分析（６mmφ）を行なうも
ので、サンプル中に存在する溶質の平均濃度を測
定するものである。また、各成分元素の発光強度
は第１図に示すｉ−ｔ曲線において安定域Ｂを積
分する方法であり、正確な定量分析を行なう場合
適切な手法といえる。 So-called emission spectroscopy has been widely used for the purpose of quality control, quality assurance, etc. in the steel industry. This method involves point analysis (6 mmφ) and measures the average concentration of solutes present in the sample. Furthermore, the luminescence intensity of each component element is determined by integrating the stability region B in the it curve shown in FIG. 1, which can be said to be an appropriate method for accurate quantitative analysis.
本発明者は、前記ｉ−ｔ曲線において、発光強
度は従来の安定域Ｂに比較し、初期（予備）放電
域Ａの一部（準安定域）ａが高感度であること、
介在物構成金属をスキヤニング分析することで容
易に検出し得ることを知見し得たのである。 The present inventor found that in the it curve, the luminescence intensity is higher in a part (metastable region) a of the initial (preliminary) discharge region A than in the conventional stable region B;
They found that inclusion metals can be easily detected by scanning analysis.
即ち、本発明は試料（被検面）をスキヤニング
させながら発光させ、鋼中介在物を検出するもの
であるが、第１図ｉ−ｔ曲線において、従来用い
られていなかつた初期（予備）放電域Ａの一部
（準安定域）ａのみを連続的に積分して発光強度
を求めることにあり、例えばアルミナクラスター
中のAl、スラグ系介在物中のCa、Mg（Caおよび
Mgは鋼に対する固溶度は殆んどない）は、スキ
ヤニング分析によつて高感度で容易に検出可能で
あることを見出したのである。 That is, the present invention detects inclusions in steel by emitting light while scanning the sample (surface to be inspected). The purpose is to continuously integrate only a part of region A (metastable region) a to determine the emission intensity. For example, Al in alumina clusters, Ca, Mg (Ca and
They found that Mg (which has almost no solid solubility in steel) can be easily detected with high sensitivity by scanning analysis.
以下に実施例を示す。 Examples are shown below.
発光面積：６mmφ
スキヤニング速度：３mm／sec
試料面積：100mm×100mm
検出対象：鋼中アルミナクラスター（第２図）
鋼中Ca系介在物（第３図）
第２図および第３図から明らかなように、鋼中
介在物の存在が、定量的に試料部位に対応して検
出され、本発明が介在物検出に有用であることを
示している。Emission area: 6 mmφ Scanning speed: 3 mm/sec Sample area: 100 mm x 100 mm Detection target: Alumina clusters in steel (Figure 2) Ca-based inclusions in steel (Figure 3) As is clear from Figures 2 and 3 In addition, the presence of inclusions in steel was quantitatively detected corresponding to the sample site, indicating that the present invention is useful for detecting inclusions.
第４図は、検出装置の発光スタンド部分の拡大
断面図で１は対極、２は試料で、発光スタンド３
の試料載置盤３ａに移動自在に載置されている。
４はレンズ保護板、５は集光レンズを示す。 Figure 4 is an enlarged sectional view of the light emitting stand part of the detection device, where 1 is the counter electrode, 2 is the sample, and the light emitting stand 3
It is movably mounted on a sample mounting plate 3a.
4 is a lens protection plate, and 5 is a condensing lens.
本発明は上述したように構成し且つ用いること
により、特別な試験片として切出す必要がなく、
オンラインで採取した試料をそのまゝ検出に適用
できること。EPMAのように顕微鏡による介在
物確認のための予見を必要としないこと。試料を
粗研磨（例えば＃60）で検出に供することができ
ること、等連続工程中における鋼中介在物の検出
を迅速に行なうことができるので、成品フローに
支障を与えることなしに、品質管理、品質保証を
適確に行うことが出来る。 By configuring and using the present invention as described above, there is no need to cut out a special test piece.
Samples collected online can be directly applied to detection. Unlike EPMA, it does not require foresight to confirm inclusions using a microscope. Samples can be roughly polished (for example, #60) for detection, and inclusions in steel can be quickly detected during continuous processes, so quality control and Quality assurance can be performed accurately.
第１図はｉ−ｔ曲線（発光強度−時間関係曲
線）図。第２図は鋼中アルミナクラスターの検出
例図。第３図は鋼中Ca系介在物の検出例図。第
４図は検出装置の発光スタンド部分の拡大断面
図。
１……対極、２……試料、３……発光スタン
ド、４……レンズ保護板、５……集光レンズ。
FIG. 1 is an it curve (emission intensity-time relationship curve) diagram. Figure 2 shows an example of detection of alumina clusters in steel. Figure 3 is an example of detection of Ca-based inclusions in steel. FIG. 4 is an enlarged sectional view of the light emitting stand portion of the detection device. 1... Counter electrode, 2... Sample, 3... Light emitting stand, 4... Lens protection plate, 5... Condensing lens.
Claims (1)
を行なうにあたり、鋼試料被検面を適宜速度で連
続的に検出装置の検出域を順次通過せしめ、前記
被検面における初期放電の高感度域のみの発光ス
ペクトル強度として測定することを特徴とする発
光分光法による鋼中介在物の検出方法。1. When detecting inclusions in steel using emission spectrometry, the test surface of the steel sample is passed through the detection area of the detection device successively at an appropriate speed, and the height of the initial discharge on the test surface is determined. A method for detecting inclusions in steel using emission spectroscopy, which is characterized in that the intensity of the emission spectrum is measured only in the sensitivity range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11265280A JPS5737252A (en) | 1980-08-18 | 1980-08-18 | Emission spectroscopic analysis for inclusion detection of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11265280A JPS5737252A (en) | 1980-08-18 | 1980-08-18 | Emission spectroscopic analysis for inclusion detection of steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5737252A JPS5737252A (en) | 1982-03-01 |
| JPS6337891B2 true JPS6337891B2 (en) | 1988-07-27 |
Family
ID=14592081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11265280A Granted JPS5737252A (en) | 1980-08-18 | 1980-08-18 | Emission spectroscopic analysis for inclusion detection of steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5737252A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2619448B2 (en) * | 1987-12-24 | 1997-06-11 | 富士通株式会社 | Digital phase comparator |
| EP1351049A3 (en) * | 2002-04-01 | 2004-02-25 | Central Iron & Steel Research Institute | Analyzer for metal |
| FR2838827B3 (en) * | 2002-04-19 | 2004-04-02 | Central Iron & Steel Res Inst | ANALYSIS METHOD OF STATISTICAL DISTRIBUTION OF ORIGINAL POSITION FOR A METAL |
| JP5304705B2 (en) * | 2010-03-30 | 2013-10-02 | 新日鐵住金株式会社 | Inclusion analysis method by emission spectroscopy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5225355A (en) * | 1975-08-20 | 1977-02-25 | Hitachi Constr Mach Co Ltd | Aparatus for lmiting maximum load experted on cranes |
| JPS5488188A (en) * | 1977-12-26 | 1979-07-13 | Daido Steel Co Ltd | Method of measuring boron in steel by luminous spectroscopic analysis |
-
1980
- 1980-08-18 JP JP11265280A patent/JPS5737252A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5225355A (en) * | 1975-08-20 | 1977-02-25 | Hitachi Constr Mach Co Ltd | Aparatus for lmiting maximum load experted on cranes |
| JPS5488188A (en) * | 1977-12-26 | 1979-07-13 | Daido Steel Co Ltd | Method of measuring boron in steel by luminous spectroscopic analysis |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5737252A (en) | 1982-03-01 |
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