JPH07198565A - Method for transferring segregation of steel - Google Patents
Method for transferring segregation of steelInfo
- Publication number
- JPH07198565A JPH07198565A JP5335220A JP33522093A JPH07198565A JP H07198565 A JPH07198565 A JP H07198565A JP 5335220 A JP5335220 A JP 5335220A JP 33522093 A JP33522093 A JP 33522093A JP H07198565 A JPH07198565 A JP H07198565A
- Authority
- JP
- Japan
- Prior art keywords
- segregation
- mixture
- transferring
- thin film
- paper
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼の連続鋳造片や、イ
ンゴットの偏析評価に利用することが出来る鋼の偏析を
転写する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transferring segregation of steel which can be used for evaluation of segregation of continuously cast steel pieces and ingots.
【０００２】[0002]
【従来の技術】鋼の偏析を転写する方法として、特公昭
64-2212 号公報、特開昭61-170581 号公報および特開平
1-227943号公報が知られている。特公昭64-2212 号公報
および特開昭61-170581 号公報の方法では、図２のフロ
ーチャートに示すように、腐食、水洗、乾燥後の金属試
料表面に有機性の高粘性液状物質として通常グリースを
塗布し、その後、細粒研磨紙を用いて仕上げ研磨したの
ち、片面に接着剤が塗布されている透明薄膜たとえばセ
ロハンテープを試料表面に押しつけ、密着させてから剥
ぎ取り、剥ぎ取った透明薄膜を台紙もしくは台板に張り
つける。2. Description of the Related Art A method for transferring the segregation of steel is disclosed in
64-2212, JP-A-61-170581 and JP-A
1-227943 is known. According to the methods of Japanese Patent Publication No. Sho 64-2212 and Japanese Patent Laid-Open No. 61-170581, as shown in the flow chart of FIG. Then, after finishing polishing with fine-grained polishing paper, a transparent thin film with adhesive applied on one side, such as cellophane tape, is pressed against the surface of the sample, adhered and then peeled off, and the transparent thin film peeled off. Affix to the backing or board.
【０００３】この工程のなかで細粒研磨紙を用いて仕上
げ研磨をする目的は、金属試料表面の腐食により生じた
偏析部の凹みに、グリースと研磨紙の砥粒および金属の
研磨かすを押し込むと同時に、偏析部以外の凸部に付着
している余分のグリースを除去し、セロハンテープに転
写された偏析模様が、偏析部とそうでない部分とで明確
に区別できるようにするためである。The purpose of finishing polishing using fine-grained polishing paper in this process is to press the abrasive grains of the grease and the polishing paper and the polishing dust of the metal into the recesses of the segregation portion caused by the corrosion of the surface of the metal sample. At the same time, the excess grease adhering to the convex portions other than the segregation portion is removed so that the segregation pattern transferred to the cellophane tape can be clearly distinguished between the segregation portion and the non-segregation portion.
【０００４】[0004]
【発明が解決しようとする課題】しかし、金属試料表面
の腐食により生じた偏析部の鮮明な転写模様を得るため
には、細粒研磨紙を用いて研磨作業を入念に行なう必要
があり、大きな金属試料の場合、多大の労苦を必要とす
る。また最初に金属試料表面を研磨した後で、腐食した
金属試料面を再度研磨することになるため、腐食後の偏
析の状況がそのまま維持されない事になり、研磨の強弱
により偏析の模様が変わるため、金属試料の偏析を正確
に転写しにくいという欠点がある。However, in order to obtain a clear transfer pattern of the segregation portion caused by the corrosion of the surface of the metal sample, it is necessary to carefully carry out the polishing work using fine-grained polishing paper, which is a major problem. In the case of a metal sample, much effort is required. Also, after the metal sample surface is first polished, the corroded metal sample surface will be polished again, so the situation of segregation after corrosion will not be maintained as it is, and the segregation pattern will change depending on the strength of polishing. However, there is a drawback that it is difficult to accurately transfer the segregation of the metal sample.
【０００５】特開平1-227943号公報の方法では、腐食後
の金属試料表面に単に透明粘着テープを張り付け、剥が
した後、粘着テープを台紙に張り付ける方法であるが、
この方法では、前述した各方法のように研磨の砥粒、グ
リース金属の研磨かす等を、腐食後の金属の凹部に押し
込む工程が無いため、金属の偏析を鮮明に転写すること
が出来ない。In the method disclosed in Japanese Patent Laid-Open No. 1-227943, a transparent adhesive tape is simply attached to the surface of a corroded metal sample, peeled off, and then the adhesive tape is attached to a mount.
In this method, since there is no step of pushing abrasive grains of abrasive, polishing residue of grease metal, etc. into the recessed portion of the metal after corrosion as in the above-mentioned methods, the segregation of the metal cannot be clearly transferred.
【０００６】本発明は、前記従来技術の問題点を解消
し、簡便な工程によって金属の偏析を鮮明に転写するこ
とが出来る方法を提供することを目的としている。An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a method capable of clearly transferring metal segregation by a simple process.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明者等は、鋭意研究を重ねた結果、金属試料表
面腐食状態のマクロ組織を転写するのに使用する有機性
の高粘性液状物質（グリース）に適量のカーボンの微細
粒を混合することと、拭き取りに使用する紙の硬さとの
間に密接な関連のあることを知見し、本発明を完成する
に至った。In order to achieve the above object, the inventors of the present invention have conducted extensive studies and, as a result, have found that an organic highly viscous liquid used for transferring a macrostructure of a metal sample surface corroded state. The inventors have found that there is a close relationship between mixing an appropriate amount of fine carbon particles with a substance (grease) and the hardness of the paper used for wiping, and completed the present invention.
【０００８】すなわち、上記知見に基づいた本発明は、
金属試料表面を研磨仕上した後、腐食、水洗、乾燥を行
なって腐食状態のマクロ組織を転写するにあたり、前記
の処理を施した金属試料表面に有機性の高粘性液状物質
と無機質の微細粒との混合物を塗布し、その後、所定の
硬さを有する紙を用いて腐食後の凸部に付着した前記混
合物を拭き取ると共に、腐食後の凹部に前記混合物を押
し込み、その後、片面に接着剤が塗布されている透明薄
膜を、前記の試料面に押しつけ、密着させてから剥ぎ取
り、剥ぎ取った透明薄膜を台紙もしくは台板に張り付け
ることを特徴とする鋼の偏析の転写方法を要旨としてい
る。That is, the present invention based on the above findings is
After polishing the surface of the metal sample, corroding, washing with water, and drying to transfer the macrostructure in the corroded state, the surface of the metal sample that has been subjected to the above treatment is treated with an organic highly viscous liquid substance and inorganic fine particles. And then wipe the mixture adhering to the convex portion after corrosion using a paper having a predetermined hardness, and push the mixture into the concave portion after corrosion, then apply the adhesive on one side The method for transferring segregation of steel is characterized in that the transparent thin film is pressed against the surface of the sample to be brought into close contact with it, then peeled off, and the peeled transparent thin film is attached to a mount or a plate.
【０００９】[0009]
【作用】本発明の構成と作用を説明する。本発明におい
て、鋼の偏析を転写する場合には、図１のフローチャー
トに示すように、腐食、水洗、乾燥後の金属試料表面
に、グリースにカーボンの微細粒を混入したものを塗布
し、その後、ある硬さの紙を用いて腐食後の凸部に付着
したグリースとカーボンの微細粒の混合物を拭き取ると
共に、腐食後の凹部にグリースとカーボンの微細粒の混
合物を押し込む。このあと片面に接着剤が塗布されてい
るセロハンテープを、前記の試料面に押しつけ、密着さ
せてから剥ぎ取り、剥ぎ取ったセロハンテープを台紙も
しくは台板に張り付ける。The structure and operation of the present invention will be described. In the present invention, in the case of transferring the segregation of steel, as shown in the flowchart of FIG. 1, a metal sample surface after corrosion, water washing and drying is coated with grease containing fine carbon particles, and then Using a paper of a certain hardness, the mixture of fine particles of grease and carbon adhering to the convex portion after corrosion is wiped off, and the mixture of fine particles of grease and carbon is pushed into the concave portion after corrosion. After that, a cellophane tape having an adhesive applied on one side is pressed against the sample surface to make them adhere to each other and then peeled off, and the peeled cellophane tape is attached to a mount or a base plate.
【００１０】上記の方法（マクロプリント法と呼ぶ）に
より、従来技術で必要とした細粒研磨紙を用いての研磨
作業がなくなり、操作が簡便になると共に、腐食した金
属試料の腐食面を再度研磨することが無いため、腐食後
の偏析の状況を正確に転写することができ、研磨の程度
により偏析模様がバラつくのも防げる。By the above method (called macro printing method), the polishing work using the fine-grained polishing paper required in the prior art is eliminated, the operation is simplified, and the corroded surface of the corroded metal sample is again removed. Since there is no polishing, the segregation state after corrosion can be accurately transferred, and the segregation pattern can be prevented from varying depending on the degree of polishing.
【００１１】[0011]
【実施例】本発明の実施例を図面を参照しながら説明す
るが、これによって本発明は何ら限定されるものではな
い。 実施例 鋼の偏析を現出せしめる腐食液として、飽和ピクリン酸
＋表面活性剤（市販の商品名：ママレモン）を使用して
被検査面を腐食し、水洗後乾燥する。このあと、有機性
の高粘液状物質としては、10-1〜102 Ｐａ・ｓの粘度の
グリース、パラフィン、ワセリンのいずれかを使用す
る。この実施例では粘度10Ｐａ・ｓ程度のLNGI No.2号
のグリースを使用した（LNGI No.：National Lubricati
on GreaseInstitute Number）。Embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. Example A saturated picric acid + surfactant (commercially available trade name: Mama Lemon) is used as a corrosive liquid that causes segregation of steel, and the surface to be inspected is corroded, washed with water and dried. Then, as the organic highly viscous liquid substance, any one of grease, paraffin and petrolatum having a viscosity of 10 −1 to 10 2 Pa · s is used. In this example, LNGI No. 2 grease having a viscosity of about 10 Pa · s was used (LNGI No .: National Lubricati
on Grease Institute Number).
【００１２】この際、使用するグリースの粘度に関して
は、硬すぎても軟らかすぎても作業がしづらくなる。す
なわち、軟らかすぎると片面に接着剤が塗布されている
セロハンテープへの転写時に流動してシャープな像の転
写ができない。また、硬すぎると被検査面の凹部へ押し
込むことが困難となり、凹部へ十分に行き渡らなくな
る。従って、グリースの粘度に関してはLNGI No.０号か
ら３号が適当である。At this time, regarding the viscosity of the grease to be used, it becomes difficult to work even if it is too hard or too soft. That is, if it is too soft, it will flow at the time of transfer to a cellophane tape having an adhesive applied on one side, and a sharp image cannot be transferred. On the other hand, if it is too hard, it will be difficult to push it into the concave portion of the surface to be inspected, and the concave portion will not be sufficiently spread. Therefore, LNGI No. 0 to 3 are suitable for the viscosity of grease.
【００１３】次に、前記のグリースに、黒色もしくは灰
色の微細粒子（カーボン粉末、SiC粉末等）を混入した
ものを被検査面に塗布する。この実施例ではカーボン粉
末を使用した。この時使用するカーボン粉末の粒度につ
いては表１に示すように50〜300 メッシュの範囲のもの
であると、転写された偏析模様のコントラストが優れて
いることが解り、中でも、100 〜250 メッシュのカーボ
ン粉末を使用したものが最も良いコントラストを示し
た。Next, the above-mentioned grease mixed with black or gray fine particles (carbon powder, SiC powder, etc.) is applied to the surface to be inspected. Carbon powder was used in this example. Regarding the particle size of the carbon powder used at this time, as shown in Table 1, it was found that the contrast of the transferred segregation pattern was excellent when it was in the range of 50 to 300 mesh. The one using carbon powder showed the best contrast.
【００１４】これは、カーボン粉末が粗すぎると、被検
査面の細かな凹部にカーボンが残りにくく、逆に細かす
ぎると、転写時にセロハンテープに付着したカーボンの
濃さが薄くなり、十分なコントラストが得られなくなる
からである。This is because if the carbon powder is too coarse, it is difficult for the carbon to remain in the fine recesses on the surface to be inspected, and if it is too fine, the density of the carbon attached to the cellophane tape at the time of transfer becomes thin, resulting in a sufficient contrast. Is not obtained.
【００１５】又、グリースに混入するカーボンの量にも
最適な範囲がある。即ち、グリースに比べカーボン量が
多すぎると、グリースの粘着力が少なくなり、被検査面
腐食後の凹部にグリースが付着しにくくなる。逆にカー
ボンの量が少なすぎるとグリースの黒色度が低下し、転
写時の像のコントラストが不鮮明となる。表２にグリー
ス１ｇ当りのカーボン混入量と、転写像のコントラス
ト、被検査面凹部細部へのグリースとカーボンの残留状
況を示す。これから、グリース１ｇ当りのカーボン混入
量は0.03〜0.30ｇが適当であり、好ましくは0.05〜0.20
ｇの範囲が良い。There is also an optimum range for the amount of carbon mixed in the grease. That is, when the amount of carbon is too large as compared with the amount of grease, the adhesive force of the grease is reduced, and the grease is less likely to adhere to the concave portion after the surface to be inspected is corroded. On the other hand, if the amount of carbon is too small, the blackness of the grease decreases, and the image contrast during transfer becomes unclear. Table 2 shows the amount of carbon admixed per 1 g of grease, the contrast of the transferred image, and the residual state of grease and carbon on the details of the concave portion of the surface to be inspected. From this, it is appropriate that the amount of carbon mixed per 1 g of grease is 0.03 to 0.30 g, preferably 0.05 to 0.20.
The range of g is good.
【００１６】次に適度な硬さの紙を用いて、腐食後の凸
部に付着したグリースとカーボンの微細粒の混合物を拭
き取ると共に、腐食後の凹部にグリースとカーボンの微
細粒の混合物を押し込むが、この際、使用する紙の硬さ
が軟らかすぎると腐食後の凸部に付着したグリースとカ
ーボンの微細粒の混合物を完全に拭き取ることができ
ず、表面に残留してコントラストが悪くなる。また、硬
すぎると拭き取りが困難になり、表面にグリースとカー
ボンの微細粒の混合物が残留しやすくなる。このため拭
き取る紙の硬さにも最適な範囲がある。表３に、拭き取
りに使用した紙の硬さと、その紙で表面を１０回拭き取
った後のグリースとカーボンの残留状況を示す。Then, using a paper having an appropriate hardness, the mixture of the fine particles of grease and carbon adhering to the convex portions after corrosion is wiped off, and the mixture of the fine particles of grease and carbon is pushed into the concave portions after corrosion. However, at this time, if the hardness of the paper used is too soft, the mixture of grease and fine carbon particles adhered to the convex portions after corrosion cannot be completely wiped off and remains on the surface to deteriorate the contrast. Further, if it is too hard, it becomes difficult to wipe it off, and a mixture of grease and fine particles of carbon tends to remain on the surface. Therefore, there is an optimum range for the hardness of the wiped paper. Table 3 shows the hardness of the paper used for wiping and the residual state of the grease and carbon after the surface was wiped 10 times with the paper.
【００１７】表３より、拭き取りに使用する紙の硬さは
40.7〜186.1 ｇ／ｍ2 の範囲が良く、好ましくは52.3〜
157.0 ｇ／ｍ2 の範囲が良い。なお、紙の硬さはｍ2 当
りの紙の重さで表す。From Table 3, the hardness of the paper used for wiping is
The range of 40.7-186.1 g / m 2 is good, preferably 52.3-
A range of 157.0 g / m 2 is good. The hardness of the paper is represented by the weight of the paper per m 2 .
【００１８】紙でカーボンを混入したグリースを拭き取
った後は、片面に接着剤が塗布されている市販の幅１０
０ｍｍのセロハンテープを、試料表面に押しつけ密着さ
せてから剥ぎ取り、剥ぎ取った透明薄膜を白色または白
色に近い台紙もしくは台板に張り付ける。連続鋳造鋳片
の中心線にそって切断採取した縦断面の中心部付近の偏
析模様を、前述の方法で転写したものを図３に示すAfter wiping off the carbon-containing grease with paper, a commercially available width 10 with an adhesive applied on one side
A 0 mm cellophane tape is pressed against the surface of the sample so as to be in close contact with the sample surface, and then peeled off. The peeled transparent thin film is attached to a white or nearly white mount or plate. FIG. 3 shows the segregation pattern near the center of the longitudinal section taken by cutting along the center line of the continuously cast slab, transferred by the above-mentioned method.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【表３】 [Table 3]
【００２２】[0022]
【発明の効果】本発明は以上説明したように構成されて
いるから、簡便な操作で、鋳片の中心線にそって切断採
取した試料の、中心部付近縦断面の腐食した偏析模様の
状況を正確に転写することが出来るので、産業上極めて
有用である。EFFECTS OF THE INVENTION Since the present invention is constructed as described above, the situation of a corroded segregation pattern in the longitudinal cross section near the center of a sample cut and sampled along the center line of a slab by a simple operation Can be accurately transferred, which is extremely useful in industry.
【図１】本発明の工程図である。FIG. 1 is a process drawing of the present invention.
【図２】従来技術の工程図である。FIG. 2 is a process diagram of a conventional technique.
【図３】本発明法により得られた鋼断面の金属組織を示
す図である。FIG. 3 is a view showing a metallographic structure of a steel cross section obtained by the method of the present invention.
Claims (6)
水洗、乾燥を行なって腐食状態のマクロ組織を転写する
にあたり、前記の処理を施した金属試料表面に有機性の
高粘性液状物質と無機質の微細粒との混合物を塗布し、
その後、所定の硬さを有する紙を用いて腐食後の凸部に
付着した前記混合物を拭き取ると共に、腐食後の凹部に
前記混合物を押し込み、その後、片面に接着剤が塗布さ
れている透明薄膜を、前記の試料面に押しつけ、密着さ
せてから剥ぎ取り、剥ぎ取った透明薄膜を台紙もしくは
台板に張り付けることを特徴とする鋼の偏析の転写方
法。1. A metal sample surface is polished and then corroded,
In transferring the macrostructure in a corroded state by washing with water and drying, a mixture of an organic highly viscous liquid substance and inorganic fine particles is applied to the surface of the metal sample subjected to the above treatment,
Then, while wiping off the mixture adhered to the convex portion after corrosion using a paper having a predetermined hardness, push the mixture into the concave portion after corrosion, then, a transparent thin film adhesive is applied to one side A method for transferring the segregation of steel, which comprises pressing the sample surface to bring it into close contact, peeling it off, and sticking the peeled transparent thin film on a mount or a plate.
・ｓのグリース、パラフィンまたはワセリンのいずれか
である請求項１記載の鋼の偏析の転写方法。2. The highly viscous liquid substance has a viscosity of 10 -1 to 10 2 Pa.
The method for transferring the segregation of steel according to claim 1, wherein the method is one of s grease, paraffin, and vaseline.
ーボン粉末、SiC 粉末のいずれかである請求項１または
２記載の鋼の偏析の転写方法。3. The method for transferring segregation of steel according to claim 1, wherein the fine inorganic particles are either carbon powder of 50 to 300 mesh or SiC powder.
粒混入量は 0.03 〜0.30ｇである請求項１、２または３
記載の鋼の偏析の転写方法。4. The amount of finely mixed inorganic particles per gram of highly viscous liquid substance is 0.03 to 0.30 g.
A method for transferring the segregation of steel as described.
6.1 ｇ／ｍ2 である請求項１〜４のいずれかに記載の鋼
の偏析の転写方法。5. The hardness of the paper used for wiping is 40.7 to 18
The method for transferring segregation of steel according to claim 1, wherein the method is 6.1 g / m 2 .
項１〜５のいずれかに記載の鋼の偏析の転写方法。6. The method for transferring the segregation of steel according to claim 1, wherein the transparent thin film is a cellophane tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33522093A JP2790426B2 (en) | 1993-12-28 | 1993-12-28 | Transfer method of steel segregation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33522093A JP2790426B2 (en) | 1993-12-28 | 1993-12-28 | Transfer method of steel segregation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07198565A true JPH07198565A (en) | 1995-08-01 |
| JP2790426B2 JP2790426B2 (en) | 1998-08-27 |
Family
ID=18286109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33522093A Expired - Fee Related JP2790426B2 (en) | 1993-12-28 | 1993-12-28 | Transfer method of steel segregation |
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| Country | Link |
|---|---|
| JP (1) | JP2790426B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100439826B1 (en) * | 2002-05-27 | 2004-07-12 | 현대자동차주식회사 | Sample pre-treatment method adapted to oxygen and nitrogen content analysis |
| JP2010138436A (en) * | 2008-12-10 | 2010-06-24 | Nippon Steel Corp | Method of detecting solidification structure of steel |
| JP2011226993A (en) * | 2010-04-22 | 2011-11-10 | Nippon Steel Corp | Method for detecting solidification structure of steel |
| JP2011226992A (en) * | 2010-04-22 | 2011-11-10 | Nippon Steel Corp | Method for detecting solidification structure of steel |
| JP2012247382A (en) * | 2011-05-31 | 2012-12-13 | Nippon Steel & Sumitomo Metal | Detection method of solidification structure for steel |
-
1993
- 1993-12-28 JP JP33522093A patent/JP2790426B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100439826B1 (en) * | 2002-05-27 | 2004-07-12 | 현대자동차주식회사 | Sample pre-treatment method adapted to oxygen and nitrogen content analysis |
| JP2010138436A (en) * | 2008-12-10 | 2010-06-24 | Nippon Steel Corp | Method of detecting solidification structure of steel |
| JP2011226993A (en) * | 2010-04-22 | 2011-11-10 | Nippon Steel Corp | Method for detecting solidification structure of steel |
| JP2011226992A (en) * | 2010-04-22 | 2011-11-10 | Nippon Steel Corp | Method for detecting solidification structure of steel |
| JP2012247382A (en) * | 2011-05-31 | 2012-12-13 | Nippon Steel & Sumitomo Metal | Detection method of solidification structure for steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2790426B2 (en) | 1998-08-27 |
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