JP3344836B2 - Heat treatment method of far-infrared radiation thin stainless steel pipe - Google Patents
Heat treatment method of far-infrared radiation thin stainless steel pipeInfo
- Publication number
- JP3344836B2 JP3344836B2 JP19460194A JP19460194A JP3344836B2 JP 3344836 B2 JP3344836 B2 JP 3344836B2 JP 19460194 A JP19460194 A JP 19460194A JP 19460194 A JP19460194 A JP 19460194A JP 3344836 B2 JP3344836 B2 JP 3344836B2
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- heat treatment
- wire
- stainless steel
- far
- 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 - Fee Related
Links
Landscapes
- Heat Treatment Of Articles (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、遠赤外線放射薄肉ステ
ンレス鋼管の熱処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for heat treating far-infrared radiating thin stainless steel tubes.
【０００２】[0002]
【従来の技術】従来、ステンレス鋼管の表面に酸化被膜
を形成した遠赤外線放射体が提案されている（特開昭55
-6433 号公報）。この遠赤外線放射ステンレス鋼管で
は、酸化被膜を形成するため、高温長時間（1040℃、４
時間）の熱処理を必要とする。このとき、薄肉鋼管（肉
厚1.5mm 未満）においては、その熱処理中に該鋼管が自
重で変形してしまう。2. Description of the Related Art A far-infrared radiator in which an oxide film is formed on a surface of a stainless steel pipe has been proposed (Japanese Patent Laid-Open No. 55-55).
-6433). In this far-infrared radiating stainless steel tube, an oxide film is formed, so that high temperature and long time (1040 ° C, 4
Time) heat treatment. At this time, in a thin steel pipe (thickness less than 1.5 mm), the steel pipe is deformed by its own weight during the heat treatment.
【０００３】そこで従来、上述の薄肉鋼管の変形を防止
するため、下記(a) 又は(b) が行なわれている。 (a) 石綿のような難燃性物質を予め鋼管の中に詰めて変
形を抑制するもの。 (b) 鋼管の内径に近いセラミックス円筒体を予め鋼管内
径部に挿入して変形を抑制するもの。In order to prevent the deformation of the thin steel pipe, the following (a) or (b) is conventionally performed. (a) A flame-retardant substance such as asbestos is packed in a steel pipe in advance to suppress deformation. (b) A ceramic cylinder close to the inner diameter of the steel pipe is inserted in advance into the inner diameter of the steel pipe to suppress deformation.
【０００４】[0004]
【発明が解決しようとする課題】然しながら、上記(a)
にあっては、石綿のような難燃性物質の詰め込み、取り
出しの作業性が悪く、また粉塵が飛んで作業環境も悪
い。また、上記(b) にあっては、熱処理時の鋼管の変形
により、挿入したセラミックス円筒体が鋼管から取り出
せなくなることがある。However, the above (a)
In this case, the workability of packing and unloading a flame-retardant substance such as asbestos is poor, and the work environment is poor due to dust flying. In the above (b), the inserted ceramic cylinder may not be able to be removed from the steel pipe due to deformation of the steel pipe during the heat treatment.
【０００５】本発明は、遠赤外線放射薄肉ステンレス鋼
管等の熱処理に際し、鋼管の変形を容易に抑制すること
を目的とする。An object of the present invention is to easily suppress deformation of a thin-walled stainless steel tube or the like during heat treatment of the tube.
【０００６】[0006]
【課題を解決するための手段】請求項１に記載の本発明
は、薄肉ステンレス鋼管の表面に酸化被膜を形成させる
ための熱処理方法を行なうに際し、該鋼管の内径部に予
め耐熱素材からなるらせんワイヤを挿入し、該らせんワ
イヤの外径部を該鋼管の内径部に弾発的に密着させた状
態とし、上記熱処理を行なう遠赤外線放射薄肉ステンレ
ス鋼管の熱処理方法である。According to the first aspect of the present invention, when a heat treatment method for forming an oxide film on the surface of a thin stainless steel pipe is performed, a spiral made of a heat-resistant material is previously provided on the inner diameter of the steel pipe. This is a method for heat-treating a far-infrared radiating thin stainless steel pipe, in which a wire is inserted and the outer diameter of the spiral wire is elastically brought into close contact with the inner diameter of the steel pipe, and the above heat treatment is performed.
【０００７】請求項２に記載の本発明は、請求項１に記
載の本発明において更に、前記らせんワイヤの素線断面
が円形であるようにしたものである。According to a second aspect of the present invention, in the first aspect of the present invention, the helical wire has a circular wire cross section.
【０００８】[0008]
【作用】請求項１に記載の本発明によれば下記、の
作用がある。 鋼管の内径部に挿入されたらせんワイヤは、その外径
部を鋼管の内径部に弾発的に密着し、該鋼管の自重によ
る変形を防止する。According to the first aspect of the present invention, the following operations are provided. The spiral wire inserted into the inner diameter of the steel pipe resiliently adheres its outer diameter to the inner diameter of the steel pipe, thereby preventing deformation of the steel pipe due to its own weight.
【０００９】らせんワイヤの挿入は、該ワイヤの弾性
を利用して押し込む、或いは該ワイヤをらせん状に回転
させて縮径しながら押し込む。また、らせんワイヤの取
り出しは、該ワイヤの弾性を利用して引き出す、或いは
該ワイヤをらせん状に回転させて縮径しながら引き出
す。これらにより、らせんワイヤは容易に鋼管内に挿入
し、或いは鋼管から取り出しでき、作業性は良い。[0009] The insertion of the helical wire is performed by utilizing the elasticity of the wire, or the helical wire is helically rotated and pressed while reducing the diameter. The spiral wire is pulled out by utilizing the elasticity of the wire, or is pulled while rotating the wire in a spiral shape to reduce the diameter. Thus, the helical wire can be easily inserted into or taken out of the steel pipe, and workability is good.
【００１０】請求項２に記載の本発明によれば下記の
作用がある。 らせんワイヤの素線断面を円形とすることにより、該
ワイヤと鋼管内面との接触は線接触となり、鋼管への挿
入時にスムースに滑り込み易く、或いは鋼管からの取り
出し時にスムースに滑り出し易く、作業性を向上でき
る。According to the second aspect of the present invention, the following operations are provided. By making the wire cross section of the helical wire circular, the contact between the wire and the inner surface of the steel pipe becomes a line contact, and the wire easily slides smoothly when inserted into the steel pipe, or slides smoothly when removed from the steel pipe, thereby improving workability. Can be improved.
【００１１】[0011]
【実施例】図１は本発明の一実施例を示す模式図、図２
は鋼管の自重による変形を示す模式図である。FIG. 1 is a schematic view showing an embodiment of the present invention, and FIG.
FIG. 3 is a schematic diagram showing deformation of a steel pipe due to its own weight.
【００１２】遠赤外線放射薄肉ステンレス鋼管は、例え
ば特開平2-165890号公報に記載の如く、ダルスキンパス
処理されたステンレス鋼帯を、造管ラインへ連続的に供
給して溶接ステンレス鋼管とし、この溶接ステンレス鋼
管を2 〜30μのロール表面粗度を有するサイジング工程
へ通し、外周面粗度が2 〜30μの溶接ステンレス鋼管と
し、更にこの溶接ステンレス鋼管を高温酸化雰囲気中へ
通し、その外周面に酸化被膜を形成させるための熱処理
を行なって製造される。このとき、酸化被膜を形成させ
るための熱処理は、高温長時間（1040℃、４時間）であ
り、薄肉鋼管（肉厚1.5 mm未満）ではその熱処理中に自
重で変形してしまう（図２）。As described in Japanese Patent Application Laid-Open No. 2-165890, for example, a far-infrared radiating thin stainless steel pipe is provided by continuously supplying a stainless steel strip subjected to a dull skin pass treatment to a pipe making line to form a welded stainless steel pipe. The welded stainless steel pipe is passed through a sizing process having a roll surface roughness of 2 to 30μ to form a welded stainless steel pipe having an outer peripheral surface roughness of 2 to 30μ. It is manufactured by performing a heat treatment for forming an oxide film. At this time, the heat treatment for forming the oxide film is performed at a high temperature for a long time (1040 ° C., 4 hours), and the thin steel pipe (thickness less than 1.5 mm) is deformed by its own weight during the heat treatment (FIG. 2). .
【００１３】然るに、本実施例では、上述の薄肉鋼管の
変形を防止するため、図１（Ａ）に示す如くの耐熱素材
からなるらせんワイヤ１０を用いた。らせんワイヤ１０
を構成する耐熱素材としては、炭素繊維、セラミックス
繊維等、或いはそれらの繊維の複合素材を用いることが
できる。However, in the present embodiment, a spiral wire 10 made of a heat-resistant material as shown in FIG. 1A is used in order to prevent the above-described deformation of the thin steel pipe. Spiral wire 10
As the heat-resistant material, carbon fiber, ceramic fiber, or the like, or a composite material of these fibers can be used.
【００１４】そして、鋼管１の内径部に予めらせんワイ
ヤ１０を挿入し、このらせんワイヤ１０の外径部を鋼管
１の内径部に弾発的に密着させた状態とし、前述の酸化
被膜を形成させるための熱処理を行なうものである。
尚、らせんワイヤ１０の素線断面はいかなる形状でも良
いが、本実施例では円形とした。Then, a spiral wire 10 is inserted into the inner diameter of the steel pipe 1 in advance, and the outer diameter of the spiral wire 10 is elastically brought into close contact with the inner diameter of the steel pipe 1 to form the above-mentioned oxide film. In this case, heat treatment is performed.
The wire cross section of the helical wire 10 may have any shape, but in this embodiment, it is circular.
【００１５】以下、本実施例の作用について説明する。 鋼管１の内径部に挿入されたらせんワイヤ１０は、そ
の外径部を鋼管１の内径部に弾発的に密着し、該鋼管１
の自重による変形を防止する。The operation of this embodiment will be described below. The spiral wire 10 inserted into the inner diameter of the steel pipe 1 elastically adheres its outer diameter to the inner diameter of the steel pipe 1.
To prevent deformation due to its own weight.
【００１６】らせんワイヤ１０の挿入は、該ワイヤ１
０の弾性を利用して押し込む、或いは該ワイヤをらせん
状に回転させて縮径しながら押し込む。また、らせんワ
イヤ１０の取り出しは、該ワイヤ１０の弾性を利用して
引き出す、或いは該ワイヤ１０をらせん状に回転させて
縮径しながら引き出す。これらにより、らせんワイヤ１
０は容易に鋼管１内に挿入し、或いは鋼管１から取り出
しでき、作業性は良い。Insertion of the helical wire 10
The wire is pushed by utilizing the elasticity of 0, or the wire is helically rotated and pushed while reducing the diameter. The spiral wire 10 is taken out by utilizing the elasticity of the wire 10, or is pulled while rotating the wire 10 in a spiral shape to reduce the diameter. By these, spiral wire 1
0 can be easily inserted into the steel pipe 1 or taken out of the steel pipe 1, and workability is good.
【００１７】らせんワイヤ１０の素線断面を円形とす
ることにより、該ワイヤ１０と鋼管１内面との接触は線
接触となり、鋼管１への挿入時にスムースに滑り込み易
く、或いは鋼管１からの取り出し時にスムースに滑り出
し易く、作業性を向上できる。By making the wire cross section of the helical wire 10 circular, the contact between the wire 10 and the inner surface of the steel pipe 1 becomes a line contact, so that the wire can easily slide smoothly when inserted into the steel pipe 1 or when the spiral wire 10 is taken out from the steel pipe 1. It is easy to slide out smoothly and workability can be improved.
【００１８】表１は本発明法の効果を従来法と比較して
示したものである。従来法１は鋼管への詰め物なしの
例、従来法２は鋼管へ石綿を詰めた例、本発明法はらせ
んワイヤ１０を用いた例である。対象鋼管サイズは、外
径90mm、肉厚0.5mm 、長さ2000mmであった。Table 1 shows the effect of the method of the present invention in comparison with the conventional method. Conventional method 1 is an example in which steel pipes are not filled, conventional method 2 is an example in which steel pipes are packed with asbestos, and the method of the present invention is an example in which spiral wire 10 is used. The target steel pipe size was 90 mm in outer diameter, 0.5 mm in wall thickness, and 2000 mm in length.
【００１９】[0019]
【表１】 [Table 1]
【００２０】(1) 熱処理後の変形は、鋼管１の縦径ｄ1
と横径ｄ2 とを測定することにて調査した。本発明法に
よれば、石綿を用いた従来法２と同様の変形抑制効果を
得ることができた。(1) The deformation after the heat treatment is caused by the vertical diameter d 1 of the steel pipe 1.
It was investigated by measuring the transverse diameter d 2 and. According to the method of the present invention, the same deformation suppressing effect as in Conventional Method 2 using asbestos could be obtained.
【００２１】(2) 本発明法によるらせんワイヤの挿入、
取り出し作業時間は、従来法２による石綿の挿入、取り
出し作業時間に比して格段に短縮でき、作業性を大幅に
向上できることを認めた。(2) insertion of a helical wire according to the method of the present invention,
It was recognized that the take-out work time can be remarkably reduced as compared with the asbestos insertion and take-out work time according to the conventional method 2, and the workability can be greatly improved.
【００２２】[0022]
【発明の効果】以上のように本発明によれば、遠赤外線
放射薄肉ステンレス鋼管等の熱処理に際し、鋼管の変形
を容易に抑制することができる。As described above, according to the present invention, deformation of a steel pipe can be easily suppressed during heat treatment of a thin-walled stainless steel pipe radiating far-infrared rays.
【図１】図１は本発明の一実施例を示す模式図であるFIG. 1 is a schematic diagram showing one embodiment of the present invention.
【図２】図２は鋼管の自重による変形を示す模式図であ
る。FIG. 2 is a schematic diagram showing deformation of a steel pipe due to its own weight.
１ 鋼管 １０ らせんワイヤ 1 steel pipe 10 spiral wire
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C23C 8/10 - 8/18 C21D 9/08 B23K 31/00 C23C 26/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. 7 , DB name) C23C 8/10-8/18 C21D 9/08 B23K 31/00 C23C 26/00
Claims (2)
形成させるための熱処理方法を行なうに際し、 該鋼管の内径部に予め耐熱素材からなるらせんワイヤを
挿入し、該らせんワイヤの外径部を該鋼管の内径部に弾
発的に密着させた状態とし、上記熱処理を行なうことを
特徴とする遠赤外線放射薄肉ステンレス鋼管の熱処理方
法。When performing a heat treatment method for forming an oxide film on the surface of a thin stainless steel pipe, a helical wire made of a heat-resistant material is inserted into the inner diameter of the steel pipe in advance, and the outer diameter of the helical wire is adjusted to the outer diameter. A heat treatment method for a far-infrared radiating thin stainless steel tube, wherein the heat treatment is performed by elastically contacting the inner diameter portion of the steel tube.
る請求項１記載の遠赤外線放射薄肉ステンレス鋼管の熱
処理方法。2. The heat treatment method for a far-infrared radiating thin stainless steel pipe according to claim 1, wherein the spiral wire has a circular wire cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19460194A JP3344836B2 (en) | 1994-07-28 | 1994-07-28 | Heat treatment method of far-infrared radiation thin stainless steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19460194A JP3344836B2 (en) | 1994-07-28 | 1994-07-28 | Heat treatment method of far-infrared radiation thin stainless steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0841622A JPH0841622A (en) | 1996-02-13 |
| JP3344836B2 true JP3344836B2 (en) | 2002-11-18 |
Family
ID=16327267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19460194A Expired - Fee Related JP3344836B2 (en) | 1994-07-28 | 1994-07-28 | Heat treatment method of far-infrared radiation thin stainless steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3344836B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831045A (en) * | 2015-03-10 | 2015-08-12 | 天津杰锋钢管工贸有限公司 | Steel pipe heating device |
| CN108517398B (en) * | 2018-06-26 | 2023-10-27 | 安徽马钢设备检修有限公司 | Post-welding heat treatment device for large-pipe-diameter thin-wall pipe and use method thereof |
-
1994
- 1994-07-28 JP JP19460194A patent/JP3344836B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0841622A (en) | 1996-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020813 |
|
| LAPS | Cancellation because of no payment of annual fees |