JPH04130069U - Steel wire holding rod for carbon concentration measurement - Google Patents
Steel wire holding rod for carbon concentration measurementInfo
- Publication number
- JPH04130069U JPH04130069U JP4639791U JP4639791U JPH04130069U JP H04130069 U JPH04130069 U JP H04130069U JP 4639791 U JP4639791 U JP 4639791U JP 4639791 U JP4639791 U JP 4639791U JP H04130069 U JPH04130069 U JP H04130069U
- Authority
- JP
- Japan
- Prior art keywords
- steel wire
- carbon concentration
- holding rod
- furnace
- wire holding
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 title claims abstract description 10
- 238000009423 ventilation Methods 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000009466 transformation Effects 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005255 carburizing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009413 insulation 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
- 230000029052 metamorphosis Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
(57)【要約】
【目的】 熱処理炉内雰囲気の炭素濃度の測定を炉内に
炭素濃度測定用鋼線を挿入して行う方法において、取り
出し時に前記鋼線の組織変態を生ぜしめることのない鋼
線保持棒を提供すること。
【構成】 保持棒１の先端に通気性を有する炭素濃度測
定用鋼線２を収納する熱保有部４を設けた。
(57) [Summary] [Purpose] To provide a method for measuring the carbon concentration in the atmosphere inside a heat treatment furnace by inserting a steel wire for carbon concentration measurement into the furnace, without causing any structural transformation of the steel wire upon removal. To provide steel wire holding rods. [Structure] At the tip of the holding rod 1, a heat retaining part 4 is provided to accommodate a breathable steel wire 2 for measuring carbon concentration.
Description
【０００１】0001
本考案は、熱処理炉内における浸炭あるいは無酸化雰囲気の炭素濃度を測定す る際に使用される炭素濃度測定用鋼線保持棒に関する。 This invention is designed to measure carbon concentration in carburizing or non-oxidizing atmosphere in a heat treatment furnace. This invention relates to a steel wire holding rod for carbon concentration measurement.
【０００２】0002
従来、熱処理炉内における浸炭あるいは無酸化雰囲気の炭素濃度は、赤外線分 析計や露点法等に代表されるように雰囲気中の一成分により求められていた。し かしながら、完全な平衡状態でない炉内雰囲気では必ずしも正確な値を得ること ができなかった。 Conventionally, the carbon concentration in the carburizing or non-oxidizing atmosphere in a heat treatment furnace was determined by infrared radiation. It was determined based on a single component in the atmosphere, as typified by an analyzer or dew point method. death However, it is not always possible to obtain accurate values in a furnace atmosphere that is not in perfect equilibrium. I couldn't do it.
【０００３】 そこで、直接炉内雰囲気の炭素濃度を計測できる鋼線法が開発された。該鋼線 法は試料たる炭素濃度測定用鋼線（以下、単に「鋼線」という。）を熱処理炉の 雰囲気中で所定時間反応させ、取り出して徐冷の後、電気抵抗測定装置の接続端 子に接続してその試料の電気抵抗値に基ずく試料の炭素量を直読するものである （特公昭４５−３５４１１号公報参照）。0003 Therefore, a steel wire method was developed that can directly measure the carbon concentration in the furnace atmosphere. the steel wire In this method, a steel wire for measuring carbon concentration (hereinafter simply referred to as "steel wire"), which is a sample, is placed in a heat treatment furnace. After reacting in the atmosphere for a predetermined period of time, taking it out and cooling it slowly, connect the connection end of the electrical resistance measuring device. directly reads the carbon content of a sample based on the electrical resistance value of the sample. (Refer to Japanese Patent Publication No. 45-35411).
【０００４】0004
従来、前記鋼線法における試料の炉内への挿入、取り出しは、図２に示すごと く、溶接棒等を加工した保持棒１の先端に試料の鋼線２を巻き付ける等して保持 せしめ、それらを炉体に設けられたサンプリングパイプから差し込み、炉気と所 要時間（前記公報では２０分）反応させた後、徐々に取り出し、室温まで冷却し た後、測定するものである。 Conventionally, the insertion and removal of the sample into the furnace in the steel wire method was as shown in Figure 2. Hold the sample by wrapping the steel wire 2 around the tip of the holding rod 1, which is made of a welding rod or the like. Insert them through the sampling pipe installed in the furnace body, and connect them to the furnace air. After reacting for the required time (20 minutes in the above publication), it was gradually taken out and cooled to room temperature. It is then measured.
【０００５】 前記鋼線法において、６００℃以上の炉内から試料の鋼線の取り出しを迅速に 行うと、急冷により、いわゆる「焼き」が入る等の組織変態が生じ、正確な測定 が困難となるため、徐々に取り出す（前記公報では１ｃｍ／ｓｅｃ程度）必要が あった。したがって、前記取り出しに人手及び注意を必要とし、さらに取り出し が終るまで人が拘束される等の問題があるとともに、取り出し（冷却）時間及び 測定に個人差が生じ、したがって測定結果にばらつきが生じる場合があった。[0005] In the above-mentioned steel wire method, the steel wire sample can be quickly removed from the furnace at temperatures of 600°C or higher. If this is done, the rapid cooling will cause structural transformations such as so-called "burning", making it difficult to make accurate measurements. Since it becomes difficult to remove the material, it is necessary to remove it gradually (about 1 cm/sec in the above publication). there were. Therefore, the removal requires manpower and attention, and There are problems such as people being restrained until the There were cases in which individual differences occurred in measurements, resulting in variations in measurement results.
【０００６】 本願考案は、上記事情に鑑みなされたもので、迅速に取り出した場合にも鋼線 に組織変態が生じることがなく、測定に個人差の生じない炭素濃度測定用鋼線保 持棒を提供することを目的とするものである。[0006] The present invention was made in view of the above circumstances, and even if the steel wire is removed quickly, A steel wire protector for measuring carbon concentration that does not cause structural transformation and individual differences in measurement. The purpose is to provide a holding stick.
【０００７】[0007]
前記課題を解決するため本願考案は、通気性を有し炭素濃度測定用鋼線を収納 する熱保有部を先端に設けた構成としたものであり、さらに前記熱保持部として 通気孔を有するステンレス管を使用したものである。 In order to solve the above-mentioned problem, the present invention has a structure that has air permeability and stores a steel wire for measuring carbon concentration. It has a structure in which a heat retention part is provided at the tip, and furthermore, as the heat retention part, It uses a stainless steel tube with ventilation holes.
【０００８】[0008]
本考案では、熱保有部４の挿入口５から鋼線２が挿入される。その際通気孔３ 及び挿入口５から鋼線２が外部に突出しないように収納される。その後前記熱保 有部４部分を炉体に設けたサンプリングパイプ（図示せず）から炉内に差し込み 、保持棒１の後端を炉外に残してサンプリングパイプを密封状態にして所要時間 （５分間）おいてから炉外に取り出し、鋼線２が室温になるまで十分に冷やして から前記電気抵抗測定器の接続端子に接続してその電気抵抗値に基ずく炭素量が 測定される。 In the present invention, the steel wire 2 is inserted through the insertion opening 5 of the heat retaining part 4. At that time, ventilation hole 3 And the steel wire 2 is housed so as not to protrude from the insertion opening 5 to the outside. Then the heat insulation Insert the four sections into the furnace from the sampling pipe (not shown) provided in the furnace body. , leave the rear end of holding rod 1 outside the furnace and keep the sampling pipe sealed for the required time. (for 5 minutes), then take it out of the furnace and cool it sufficiently until the steel wire 2 reaches room temperature. The amount of carbon based on the electrical resistance value is measured by connecting the connecting terminal of the electrical resistance measuring device from be measured.
【０００９】 本考案では、鋼線２が裸の状態で炉外に取り出されることがなく、熱保有部４ に収納されて取り出される。したがって、該熱保有部４により急冷されることが なく徐冷されるため取り出し時に焼きが入る等の組織変態を生ぜしめることがな い。また、熱保有部４は通気性を有するため、炉内差し込み時には雰囲気が内部 に収納された鋼線２に十分に反応するものである。[0009] In the present invention, the steel wire 2 is not taken out of the furnace in a bare state, and the heat retaining part 4 It is stored and taken out. Therefore, the heat retaining portion 4 prevents rapid cooling. Since it is slowly cooled without causing any structural changes such as burning during removal, stomach. In addition, since the heat retaining part 4 has ventilation, the atmosphere inside the furnace is It reacts sufficiently to the steel wire 2 housed in the container.
【００１０】0010
以下に本考案の一実施例を図面について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
【００１１】 本考案は、図１に示すごとく、適当長さの保持棒１の先端に、通気性を有し、 鋼線２を収納する熱保有部４を設けるものである。図面実施例では前記保持棒１ として、耐熱性を有するニッケル−クロム線等が使用され、また熱保有部４とし て通気孔３を設けたステンレス管が使用されている。[0011] As shown in FIG. 1, the present invention has air permeability at the tip of a holding rod 1 of an appropriate length. A heat retaining section 4 for storing the steel wire 2 is provided. In the drawing embodiment, the holding rod 1 As the heat-retaining part 4, a heat-resistant nickel-chromium wire or the like is used. A stainless steel pipe with ventilation holes 3 is used.
【００１２】 いずれにしても前記熱保有部４は、高温の炉内雰囲気中から一気に炉外の室温 中に引き出しても内部に収納した鋼線２に急冷による組織変態を生ぜしめないよ うに作用する構成とされる。すなわち、具体的には適当時間熱を保有する素材が 使用され、あるいはさらに厚さを調整して適当時間熱を保有するように構成され る。したがって、その素材は金属に限られるものではなく、セラミック等の無機 材でもよく、また管状に限らず篭状であってもよい。さらに適位置には鋼線２の 挿入口５が設けられる。0012 In any case, the heat retaining section 4 suddenly changes from the high-temperature atmosphere inside the furnace to the room temperature outside the furnace. Even if it is pulled out, the steel wire 2 stored inside will not undergo structural transformation due to rapid cooling. It is said that the structure is designed to work in the same way. In other words, specifically, the material retains heat for a suitable period of time. used or further configured to adjust the thickness to retain heat for an appropriate amount of time. Ru. Therefore, the material is not limited to metals, but also inorganic materials such as ceramics. It may be a material, and it is not limited to a tubular shape, but may be a basket shape. Furthermore, steel wire 2 is placed in the appropriate position. An insertion port 5 is provided.
【００１３】 本考案は前記構成になり、そこで浸炭熱処理炉を用い、その雰囲気を酸素セン サ−で炭素濃度が０．８ウエイトパ−セントとなるように制御し、前記従来の保 持棒と前記本考案の保持棒にそれぞれ３本の鋼線を保持せしめ、炉内に差し込み 同時間保持した後、従来の保持棒の取り出し速度は１ｃｍ／ｓｅｃ以下とし、本 考案の保持棒は一気に取り出し、両保持棒に保持したそれぞれ３本の鋼線２のも つ炭素濃度の平均値を測定し、同様の測定を８回繰返した結果を表１に示す。[0013] The present invention has the above-mentioned structure, and uses a carburizing heat treatment furnace to change the atmosphere to oxygen. The carbon concentration was controlled to be 0.8 weight percent using the conventional The holding rod and the holding rod of the present invention each hold three steel wires and are inserted into the furnace. After holding for the same time, the removal speed of the conventional holding rod is 1 cm/sec or less, and the main The holding rods of the invention were taken out at once, and the three steel wires 2 held on both holding rods were also removed. Table 1 shows the results of repeating the same measurement eight times.
【００１４】[0014]
【表１】 上記表１によると、従来の保持棒方式では鋼線２に組織変態が生じて正規の値 を示さないことがあるのに対し、本考案の保持棒方式ではほぼ全部が正規の値を 示すことが確認されたものである。[Table 1] According to Table 1 above, in the conventional holding rod method, the steel wire 2 may undergo structural transformation and not show normal values, whereas in the holding rod method of the present invention, almost all of the steel wires show normal values. has been confirmed.
【００１５】[0015]
本考案によれば、試料の鋼線を炉内から迅速に取り出した場合にも鋼線に組織 変態が生じることがなく、測定に個人差等のバラつきが生じない効果が得られる ものである。 According to the present invention, even when the sample steel wire is quickly removed from the furnace, the steel wire has no structure. No metamorphosis occurs, and the effect of eliminating variations in measurement due to individual differences etc. can be obtained. It is something.
【図面の簡単な説明】[Brief explanation of drawings]
【図１】本考案の一部切り欠き側面図である。FIG. 1 is a partially cutaway side view of the present invention.
【図２】従来例を示す側面図である。FIG. 2 is a side view showing a conventional example.
１ 保持棒 ２ 鋼線 ３ 通気孔 ４ 熱保有部 1 Holding rod 2 Steel wire 3 Ventilation hole 4 Heat retention part
───────────────────────────────────────────────────── フロントページの続き (72)考案者 渡辺 雅彦 神奈川県横浜市港北区箕輪町２丁目６番26 号 東京熱処理工業株式会社内 (72)考案者 北本 健一 神奈川県横浜市港北区箕輪町２丁目６番26 号 東京熱処理工業株式会社内 ──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Masahiko Watanabe 2-6-26 Minowa-cho, Kohoku-ku, Yokohama, Kanagawa Prefecture No. Tokyo Heat Treatment Industry Co., Ltd. (72) Creator Kenichi Kitamoto 2-6-26 Minowa-cho, Kohoku-ku, Yokohama, Kanagawa Prefecture No. Tokyo Heat Treatment Industry Co., Ltd.
Claims (2)
する熱保有部を先端に設けたことを特徴とする炭素濃度
測定用鋼線保持棒。1. A steel wire holding rod for measuring carbon concentration, characterized in that the rod is provided with a heat retaining portion at its tip that has air permeability and accommodates a steel wire for measuring carbon concentration.
である請求項１記載の炭素濃度測定用鋼線保持棒。2. The steel wire holding rod for carbon concentration measurement according to claim 1, wherein the heat retaining portion is a stainless steel tube having ventilation holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991046397U JP2586972Y2 (en) | 1991-05-23 | 1991-05-23 | Steel wire holding rod for carbon concentration measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991046397U JP2586972Y2 (en) | 1991-05-23 | 1991-05-23 | Steel wire holding rod for carbon concentration measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04130069U true JPH04130069U (en) | 1992-11-30 |
| JP2586972Y2 JP2586972Y2 (en) | 1998-12-14 |
Family
ID=31925918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991046397U Expired - Lifetime JP2586972Y2 (en) | 1991-05-23 | 1991-05-23 | Steel wire holding rod for carbon concentration measurement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2586972Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6709629B2 (en) | 2001-06-04 | 2004-03-23 | Dowa Mining Co., Ltd. | Vacuum heat treatment furnace |
| JP2011002381A (en) * | 2009-06-19 | 2011-01-06 | Isuzu Motors Ltd | Pm sensor |
| WO2011093313A1 (en) * | 2010-01-27 | 2011-08-04 | いすゞ自動車株式会社 | Particulate matter sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02220730A (en) * | 1989-02-21 | 1990-09-03 | Okamoto:Kk | Casting method for using organic self-hardening mold |
-
1991
- 1991-05-23 JP JP1991046397U patent/JP2586972Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02220730A (en) * | 1989-02-21 | 1990-09-03 | Okamoto:Kk | Casting method for using organic self-hardening mold |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6709629B2 (en) | 2001-06-04 | 2004-03-23 | Dowa Mining Co., Ltd. | Vacuum heat treatment furnace |
| JP2011002381A (en) * | 2009-06-19 | 2011-01-06 | Isuzu Motors Ltd | Pm sensor |
| WO2011093313A1 (en) * | 2010-01-27 | 2011-08-04 | いすゞ自動車株式会社 | Particulate matter sensor |
| JP2011153930A (en) * | 2010-01-27 | 2011-08-11 | Isuzu Motors Ltd | Pm (particulate matter) sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2586972Y2 (en) | 1998-12-14 |
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