JP2586972Y2 - Steel wire holding rod for carbon concentration measurement - Google Patents
Steel wire holding rod for carbon concentration measurementInfo
- Publication number
- JP2586972Y2 JP2586972Y2 JP1991046397U JP4639791U JP2586972Y2 JP 2586972 Y2 JP2586972 Y2 JP 2586972Y2 JP 1991046397 U JP1991046397 U JP 1991046397U JP 4639791 U JP4639791 U JP 4639791U JP 2586972 Y2 JP2586972 Y2 JP 2586972Y2
- 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.)
- Expired - Lifetime
Links
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)
Description
【０００１】[0001]
【産業上の利用分野】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。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel wire holding rod for measuring carbon concentration used for measuring carbon concentration in a carburized or non-oxidizing atmosphere in a heat treatment furnace.
【０００２】[0002]
【従来の技術】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。2. Description of the Related Art Conventionally, the carbon concentration of a carburizing or non-oxidizing atmosphere in a heat treatment furnace has been determined by one component in the atmosphere as represented by an infrared spectrometer or a dew point method. However, accurate values could not always be obtained in a furnace atmosphere that was not in a perfect equilibrium state.
【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
電気抵抗値に基づ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 capable of directly measuring the carbon concentration in the furnace atmosphere has been developed. In the steel wire method, a steel wire for measuring carbon concentration (hereinafter, simply referred to as “steel wire”) as a sample is reacted in an atmosphere of a heat treatment furnace for a predetermined time, taken out, gradually cooled, and then connected to a connection terminal of an electric resistance measuring device. To directly read the carbon content of the sample based on the electrical resistance of the sample (see Japanese Patent Publication No. 45-35411).
【０００４】[0004]
【考案が解決しようとする課題】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、炉気と所定時間
（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 a sample into and from the furnace in the above-described steel wire method is performed by attaching a sample steel wire 2 to the tip of a holding rod 1 formed by welding a rod or the like, as shown in FIG.
Are wound and held, and inserted through a sampling pipe provided in the furnace body, reacted with furnace air for a predetermined time (20 minutes in the above-mentioned publication), gradually taken out, cooled to room temperature, and measured. Things.
【０００５】前記鋼線法において、６００℃以上の炉内
から試料の鋼線を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）が必要あった。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。In the steel wire method, if a sample steel wire is quickly taken out of a furnace at a temperature of 600 ° C. or higher, rapid cooling causes structural transformation such as so-called “burning”, which makes accurate measurement difficult. Therefore, it was necessary to take it out gradually (about 1 cm / sec in the above publication). Therefore, there is a problem that the removal requires manual labor and attention, and furthermore, there is a problem that a person is restrained until the removal is completed, and there is an individual difference in a removal (cooling) time and a measurement, and thus a variation occurs in a measurement result. was there.
【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。The present invention has been made in view of the above circumstances, and a steel wire holding rod for carbon concentration measurement which does not cause structural transformation in the steel wire even when taken out quickly and does not cause individual differences in measurement. It is intended to provide.
【０００７】[0007]
【課題を解決するための手段】前記課題を解決するため
本願考案は、先端に炭素濃度測定用鋼線の収納部を有
し、該収納部は炉内における加熱後、炉外に引き出して
も適当時間熱を保有する素材で構成され、さらに通気性
を有し、かつ前記炭素濃度測定用鋼線の挿入口を有する
構成としたものであり、好ましくは、前記収納部を周囲
に通気孔を有するステンレス管としたものである。In order to solve the above-mentioned problems, the invention of the present application has a steel wire storage portion at the tip for storing carbon concentration.
Then, after heating in the furnace, the storage part is pulled out of the furnace and
Is made of a material that retains heat for an appropriate amount of time, and
The a, and is obtained by a <br/> structure having an insertion opening of the carbon concentration measuring steel wire, preferably, around the housing part
It is obtained by a stainless steel tube having a vent to.
【０００８】[0008]
【作用】本考案では、保持棒１の先端に設けられた鋼線
２の収納部４の挿入口５から試料の鋼線２が挿入され
る。その際、前記収納部４の周囲に設けられた通気孔３
及び前記挿入口５から鋼線２の一部が外部に突出しない
ように鋼線２の全体が内部に収納される。その後、前記
収納部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収納部４から取り出し、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
づく炭素量が測定される。In the present invention, the steel wire provided at the tip of the holding rod 1 is used.
The steel wire 2 of the sample is inserted from the insertion opening 5 of the second storage unit 4. At this time, the ventilation holes 3 provided around the storage section 4
And a portion from the insertion opening 5 of the steel wire 2 has a whole of the steel wire 2 so as not to protrude to the outside is housed inside. Thereafter, the storage section 4 is inserted into the furnace from a sampling pipe (not shown) provided in the furnace body, and the sampling pipe is sealed while leaving the rear end of the holding rod 1 outside the furnace, and the required time (5 Minutes), take it out of the furnace, sufficiently cool the steel wire 2 until it reaches room temperature, take it out of the storage part 4 , connect it to the connection terminal of the electric resistance measuring instrument, and measure the carbon amount based on the electric resistance value. Is done.
【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、収納部４内に全体が収納されて
取り出される。したがって、該収納部４により鋼線２全
体が急冷されることがなく均一に徐冷されるため取り出
し時に、例えば、その一部分に焼きが入る等の組織変態
が生じることが防止される。また、収納部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。In the present invention, the steel wire 2 is not taken out of the furnace in a bare state, but is taken out by being stored in the storage part 4 as a whole. Therefore, since the entire steel wire 2 is gradually cooled without being rapidly cooled by the storage portion 4, at the time of removal, for example, a structural transformation such as a part of the steel wire is burned.
Is prevented from occurring. Further, since the storage section 4 has air permeability, the atmosphere sufficiently reacts with the steel wire 2 stored therein when inserted into the furnace.
【００１０】[0010]
【実施例】以下に本考案の一実施例を図面について説明
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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、かつ鋼線２の挿入口
５を有し、鋼線２の全体を収納する収納部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−クローム線等が使用され、また、収
納部４として周囲に通気孔３を設けたステンレス管が使
用され、その端部の開口部が前記鋼線２の挿入口５に構
成されている。In the present invention, as shown in FIG. 1, an end of a holding rod 1 having an appropriate length has air permeability and an insertion port for a steel wire 2.
5 for providing a storage section 4 for storing the entire steel wire 2. As the holding rod 1 in the drawings embodiment, the nickel has a heat resistance - chrome wire or the like is used, also, Osamu
A stainless steel tube provided with a vent hole 3 around it is used as the storage part 4, and the opening at the end of the stainless steel pipe is connected to the insertion port 5 of the steel wire 2.
It has been formed.
【００１２】さらに前記収納部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、具体的には炉内におけ
る加熱後、炉外に引き出しても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。 Further, the storage portion 4 is configured to act so as not to cause structural transformation by rapid cooling of the steel wire 2 stored therein even if the storage portion 4 is pulled out from the high-temperature furnace atmosphere to room temperature outside the furnace at a stretch. You. That is, specifically, in the furnace
After heating, a material that retains heat for an appropriate period of time even when pulled out of the furnace is used, or the thickness is adjusted to retain heat for an appropriate period of time. Therefore, the material is not limited to metal, but may be an inorganic material such as ceramic, and may be not only tubular but also basket-shaped.
【００１３】本考案は前記構成になり、そこで浸炭処理
炉を用い、その雰囲気を酸素センサーで炭素濃度が０．
８ウエイトパー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 furnace, and uses an oxygen sensor to measure the atmosphere with a carbon concentration of 0.3.
The steel rod is controlled to be 8 weight percent, and three steel wires are respectively held by the conventional holding rod and the holding rod of the present invention, inserted into the furnace, and held for the same time, and then the conventional holding rod is taken out. The speed was set to 1 cm / sec or less, the holding rod of the present invention was taken out at a stretch, and the average value of the carbon concentration of each of the three steel wires 2 held by both holding rods was measured. The same measurement was repeated eight times. Are shown in Table 1.
【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 the above Table 1, in the conventional holding rod method, structural transformation occurs in the steel wire 2 and the steel wire 2 may not show a regular value, whereas in the holding rod method of the present invention, almost all of the steel rod 2 has a regular value. It has been confirmed that it shows a value.
【００１５】[0015]
【考案の効果】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全体が均一に徐冷され、
部分的な組織変態も防止でき、正確な測定が可能であ
り、さらに測定に個人差等のバラつきが生じない等の効
果が得られるものである。According to the present invention, even when a sample steel wire is quickly taken out of the furnace, the entire steel wire is uniformly cooled slowly.
Partial transformation of the structure can be prevented, accurate measurement is possible, and effects such as no variation in individual measurement are obtained.
【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 収納部 DESCRIPTION OF SYMBOLS 1 Holding rod 2 Steel wire 3 Vent hole 4 Storage part
───────────────────────────────────────────────────── フロントページの続き (72)考案者 五井 均 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 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 (56)参考文献 実開 昭53−1391（ＪＰ，Ｕ) 特公 昭45−35411（ＪＰ，Ｂ１) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hitoshi Goi 2-6-26 Minowa-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside of Tokyo Heat Treatment Industry Co., Ltd. (72) Masahiko Watanabe 2 Minowa-cho, Kohoku-ku, Yokohama-shi, Kanagawa 6-6-26 Tokyo Heat Treatment Industry Co., Ltd. (72) Inventor Kenichi Kitamoto 2-6-26 Minowa-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Tokyo Heat Treatment Industry Co., Ltd. (56) References JP, U) JP-B-45-35411 (JP, B1)
Claims (2)
し、該収納部は炉内における加熱後、炉外に引き出して
も適当時間熱を保有する素材で構成され、さらに通気性
を有し、かつ前記炭素濃度測定用鋼線の挿入口を有する
ことを特徴とする炭素濃度測定用鋼線保持棒。1. A steel wire for carbon concentration measurement is provided at a tip thereof.
Then, after heating in the furnace, the storage part is pulled out of the furnace and
Is made of a material that retains heat for an appropriate amount of time, and
And a steel wire holding rod for measuring carbon concentration, which has an insertion port for the steel wire for measuring carbon concentration.
ンレス管である請求項１記載の炭素濃度測定用鋼線保持
棒。2. The steel wire holding rod for measuring carbon concentration according to claim 1, wherein said storage portion is a stainless steel tube having a vent hole around the circumference .
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 JPH04130069U (en) | 1992-11-30 |
| JP2586972Y2 true 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) |
Families Citing this family (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 |
| JP5444872B2 (en) * | 2009-06-19 | 2014-03-19 | いすゞ自動車株式会社 | Particulate matter detection system |
| JP5463935B2 (en) * | 2010-01-27 | 2014-04-09 | いすゞ自動車株式会社 | PM sensor and exhaust system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH062302B2 (en) * | 1989-02-21 | 1994-01-12 | 株式会社岡本 | Casting method using self-hardening mold and volume increasing material used therefor |
-
1991
- 1991-05-23 JP JP1991046397U patent/JP2586972Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04130069U (en) | 1992-11-30 |
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