JPH0565529A - Skiddrail with composite ceramics - Google Patents

Skiddrail with composite ceramics

Info

Publication number
JPH0565529A
JPH0565529A JP4371492A JP4371492A JPH0565529A JP H0565529 A JPH0565529 A JP H0565529A JP 4371492 A JP4371492 A JP 4371492A JP 4371492 A JP4371492 A JP 4371492A JP H0565529 A JPH0565529 A JP H0565529A
Authority
JP
Japan
Prior art keywords
ceramic member
heat
rail
skid
metal fitting
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.)
Pending
Application number
JP4371492A
Other languages
Japanese (ja)
Inventor
Jiro Ichikawa
二朗 市川
Hideki Ohashi
秀樹 大橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daido Steel Co Ltd
JFE Engineering Corp
AGC Inc
Original Assignee
Daido Steel Co Ltd
Asahi Glass Co Ltd
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daido Steel Co Ltd, Asahi Glass Co Ltd, NKK Corp, Nippon Kokan Ltd filed Critical Daido Steel Co Ltd
Priority to JP4371492A priority Critical patent/JPH0565529A/en
Publication of JPH0565529A publication Critical patent/JPH0565529A/en
Pending legal-status Critical Current

Links

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  • Furnace Charging Or Discharging (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)

Abstract

(57)【要約】 【目的】 連続加熱炉のスキッドレールの熱効率向上と
スキッドマーク発生防止を目的としてセラミックスを複
合したスキッドレールにおいて、セラミックス部材の使
用量を減らす。 【構成】 水冷パイプを有するレール基材の上に耐熱合
金製のセラミックス部材固定金具を設け、この固定金具
に断熱材を介してセラミックス部材を固定する。固定金
具の一部はキャスタブル耐火物により被覆され、上部だ
けが露出する。
(57) [Summary] [Purpose] To reduce the amount of ceramic members used in skid rails that combine ceramics for the purpose of improving the thermal efficiency of skid rails in continuous heating furnaces and preventing the generation of skid marks. [Structure] A ceramic member fixing metal fitting made of a heat-resistant alloy is provided on a rail base material having a water cooling pipe, and the ceramic member is fixed to the fixing metal fitting via a heat insulating material. Part of the fixing bracket is covered with castable refractory, and only the upper part is exposed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、連続加熱炉とくにプッ
シャー炉やウォーキングビーム炉のスキッドレールの改
良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in skid rails for continuous heating furnaces, particularly pusher furnaces and walking beam furnaces.

【0002】[0002]

【従来の技術】連続加熱炉における熱効率の向上と被加
熱物のスキッドマーク発生防止を目的として、スキッド
レールの上面に耐熱セラミックスを複合したスキッドレ
ールが提案され、実用されるようになってきた。 耐熱
セラミックスとしては、Si3N4質、Sialon質、および
SiC質のものが代表的である。
2. Description of the Related Art For the purpose of improving thermal efficiency in a continuous heating furnace and preventing generation of skid marks on a heated object, skid rails having a combination of heat-resistant ceramics on the upper surface of the skid rail have been proposed and put into practical use. Typical heat-resistant ceramics are those of Si 3 N 4 quality, Sialon quality, and SiC quality.

【0003】セラミックスを複合したスキッドレールの
通常の構造は、水冷パイプに、炭素鋼、低合金鋼または
SUS304(18Cr−8Ni)程度の耐熱鋼でつくっ
たセラミックス部材固定金具を溶接し、その上に断熱材
をおいて、セラミックス部材を固定してなるものであ
る。 固定金具は、水冷パイプとともに、高温のガスに
触れないように、キャスタブル耐火物で被覆してある。
上記の材料でつくった固定金具の耐熱性、耐食性は十
分ではないので、キャスタブル耐火物の表面から20mm
程度は埋没した構造とするのがふつうである。
The usual structure of a skid rail composed of ceramics is to weld a water-cooled pipe to a ceramic member fixing metal fitting made of carbon steel, low alloy steel or heat-resistant steel of SUS304 (18Cr-8Ni), and then weld it. A ceramic member is fixed with a heat insulating material. The fixing metal fittings, together with the water-cooled pipe, are covered with castable refractory so as not to come into contact with high temperature gas.
20mm from the surface of the castable refractory because the fixing metal fittings made of the above materials do not have sufficient heat resistance and corrosion resistance.
The degree is usually a buried structure.

【0004】そのため、耐熱セラミックスは、キャスタ
ブル耐火物より外部に20mm以上、そして内部に30mm
以上、合計50mm以上の厚さをもつ必要がある。 とこ
ろが、前記した耐熱セラミックスはいずれも高価である
から、なるべくその使用量をへらすことが望ましい。
セラミックス部材を小さくすることは、製造歩留りを向
上させるばかりでなく、使用中のワレの防止にも有利で
ある。
Therefore, the heat-resistant ceramics are 20 mm or more outside the castable refractory and 30 mm inside.
As described above, it is necessary to have a total thickness of 50 mm or more. However, since the above-mentioned heat-resistant ceramics are all expensive, it is desirable to reduce the amount used.
Making the ceramic member smaller is advantageous not only for improving the manufacturing yield but also for preventing cracks during use.

【0005】[0005]

【発明が解決しようとする課題】本発明の目的は、上記
の要望にこたえて、セラミックス部材の使用量を減らし
たセラミックス複合スキッドレールを提供することにあ
る。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a ceramic composite skid rail in which the amount of the ceramic member used is reduced in response to the above demand.

【0006】[0006]

【課題を解決するための手段】本発明のセラミックスを
複合したスキッドレールは、図面に一例を示すように、
水冷パイプ(2)を有するレール基材(3)の上に被加
熱物と接触する上面に耐熱セラミックス部材(6)を使
用し、上部以外をキャスタブル耐火物(7)で被覆して
なる加熱炉用スキッドレールにおいて、レール基材
(3)の上に耐熱合金製のセラミックス部材固定金具
(4)を設け、この固定金具(4)に断熱材(5)を介
してセラミックス部材を固定してなり、固定金具(4)
の一部がキャスタブル耐火物(7)の被覆の外に露出す
る構造とすることにより、レール上面を薄いセラミック
ス部材(6)で構成したことを特徴とするスキッドレー
ル(1)である。
A skid rail made of composite ceramics according to the present invention, as shown in the drawings,
A heating furnace comprising a rail base material (3) having a water-cooled pipe (2), a heat-resistant ceramic member (6) used on the upper surface in contact with an object to be heated, and a castable refractory material (7) other than the upper part. In the skid rail for use, a ceramic member fixing metal fitting (4) made of a heat-resistant alloy is provided on the rail base material (3), and the ceramic member is fixed to the fixing metal fitting (4) via a heat insulating material (5). , Fixing metal fittings (4)
The skid rail (1) is characterized in that the upper surface of the rail is made of a thin ceramic member (6) by having a structure in which a part of the above is exposed to the outside of the coating of the castable refractory (7).

【0007】[0007]

【作用】上記の構造により、スキッドレールに使用する
耐熱セラミックスの厚さを著しく減らすことができる。
一例をあげれば、雰囲気温度1300℃のウォーキン
グビーム型鋼片連続加熱炉において、均熱帯のスキッド
レールの上面に使用するSi3N4焼結体の厚さは、従来
65mm必要であったが、本発明に従って、セラミックス
部材固定金具を21%Ni−28%Cr−23%Coの鉄
基超耐熱鋳鋼でつくり、セラミックス部材との間の断熱
にコーディエライト質ハニカム断熱材を用いた場合に
は、焼結Si3N4部材の厚さを20mmにすることができ
た。
With the above structure, the thickness of the heat resistant ceramic used for the skid rail can be significantly reduced.
As an example, in the walking beam type billet continuous heating furnace with an atmospheric temperature of 1300 ° C, the Si 3 N 4 sintered body used for the upper surface of the soaking rail in the soaking zone had conventionally required a thickness of 65 mm. According to the invention, when the ceramic member fixing bracket is made of 21% Ni-28% Cr-23% Co iron-base ultra-heat-resistant cast steel, and the cordierite honeycomb heat insulating material is used for heat insulation with the ceramic member, The thickness of the sintered Si 3 N 4 member could be 20 mm.

【0008】[0008]

【実施例】図1および図2に例示する好ましい態様にお
いては、このスキッドレール(1)は、鋼製のレール基
材(3)の上に、超耐熱鋳鋼製のセラミックス部材固定
金具(4)を、レール基材(3)との間に部分的に断熱
材(8)を介してとりつけてなる。
EXAMPLE In the preferred embodiment illustrated in FIGS. 1 and 2, the skid rail (1) comprises a steel base material (3) and a ceramic member fixing metal fitting (4) made of super heat-resistant cast steel. Is partially mounted between the rail base material (3) and the heat insulating material (8).

【0009】この固定金具(4)は、一部がスキッドレ
ール本体を被覆しているキャスタブル耐火物(7)の外
に露出しているので、従来用いられてきた材料では耐熱
性が不十分であって、Crを11%以上含有するNi、C
oまたはFe基耐熱合金を使用しなければならない。 2
1%Ni−28%Cr−23%Coを主成分とする超耐熱
鋳鋼が好ましい。 ただし、このような鋼は炭素鋼より
溶接性が劣るので、炭素鋼の止め金具(9)をレール基
材(3)に溶接して、これでとりつける。 断熱耐火物
(5)は、たとえば厚さ20mmのAl2O3−SiO2質断
熱レンガや、コーディエライト(MgO−Al2O3−Si
O2)質のハニカム構造のものを使用する。 前記のよ
うな超耐熱合金を使用しても、使用に耐える温度はおお
よそ1250℃までであるから、セラミックス部材固定
金具の最高温度がこの限界を超えないように、断熱耐火
物を施さなければならない。 セラミックス部材固定金
具(3)とレール基材(2)との間の断熱材も、上記と
同様である。
Since the fixing metal fitting (4) is partially exposed to the outside of the castable refractory material (7) covering the skid rail body, the heat resistance of the conventionally used material is insufficient. Ni, C containing 11% or more of Cr
o or Fe based heat resistant alloy must be used. Two
A super heat resistant cast steel containing 1% Ni-28% Cr-23% Co as a main component is preferable. However, since such steel is inferior in weldability to carbon steel, the fastener (9) of carbon steel is welded to the rail base material (3) and attached thereto. The adiabatic refractory material (5) is, for example, a 20 mm thick Al 2 O 3 —SiO 2 adiabatic brick or cordierite (MgO—Al 2 O 3 —Si).
O 2 ) quality honeycomb structure is used. Even if the above super heat resistant alloy is used, the temperature that can withstand use is up to approximately 1250 ° C. Therefore, a heat insulating refractory must be applied so that the maximum temperature of the ceramic member fixing bracket does not exceed this limit. . The heat insulating material between the ceramic member fixing bracket (3) and the rail base material (2) is also the same as above.

【0010】セラミックス部材の固定には、図3に示す
ような態様もある。 すなわち、耐熱合金製の固定金具
(4)を円筒状に形成し、レール基材(3)にはこれに
対応する突起を設け、両者をネジのかみあいにより固定
してある。 この固定は、もちろん溶接によってもよ
い。 この例では、セラミックス部材の下の断熱耐火物
は、直接レール基材と接している。 セラミックス部材
の固定を確実なものとするため、図示したようにセラミ
ックス部材(6)を円錐台形とし、固定金具(4)の内
面をそれに対応する形状とするなどの手段をとるとよ
い。 固定金具(4)の上縁は、セラミックス部材
(6)の上面とほぼ同じ高さにしてある。
There is also a mode shown in FIG. 3 for fixing the ceramic member. That is, a fixing metal fitting (4) made of a heat-resistant alloy is formed in a cylindrical shape, a corresponding projection is provided on the rail base material (3), and both are fixed by screw engagement. This fixing may, of course, be welding. In this example, the adiabatic refractory below the ceramic member is in direct contact with the rail substrate. In order to secure the fixation of the ceramic member, it is advisable to take a means such as making the ceramic member (6) into a truncated cone shape and the inner surface of the fixing metal fitting (4) to have a shape corresponding to that as shown in the figure. The upper edge of the fixing metal fitting (4) is substantially level with the upper surface of the ceramic member (6).

【0011】図3の態様は、図2の例より耐熱合金の使
用量が少なく、かつ固定が簡単にできる。 また、セラ
ミックス部材の脱出防止の配慮もしてある。
The embodiment of FIG. 3 uses less heat-resistant alloy than the example of FIG. 2 and can be easily fixed. Also, consideration is given to preventing the ceramic member from coming out.

【0012】[0012]

【発明の効果】本発明のセラミックスを複合したスキッ
ドレールは、耐熱セラミックスの厚さを薄くすることに
より使用量を減らすことに成功し、しかも熱効率を向上
させるという目的に反することがない。
The skid rail made of composite ceramics of the present invention succeeds in reducing the amount used by reducing the thickness of the heat-resistant ceramics, and does not violate the purpose of improving the thermal efficiency.

【0013】このスキッドレールにおいても、セラミッ
クス部材の上面は1300℃の雰囲気温度と実質上差の
ない温度になり、スキッドマークの発生が防げる。 ま
た、レールの破損頻度が半減する。
Also in this skid rail, the upper surface of the ceramic member has a temperature substantially the same as the ambient temperature of 1300 ° C., and the generation of skid marks can be prevented. Moreover, the frequency of rail damage is halved.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明のセラミックスを複合したスキッドレ
ールの代表的な態様の縦断面図。
FIG. 1 is a vertical cross-sectional view of a typical embodiment of a skid rail that is a composite of ceramics of the present invention.

【図2】 図1A−A位置における横断面図。FIG. 2 is a cross-sectional view at the position of FIG. 1A-A.

【図3】 別の態様を示す、図2に相当する断面図。FIG. 3 is a cross-sectional view corresponding to FIG. 2, showing another embodiment.

【符号の説明】[Explanation of symbols]

1 スキッドレール 3 レール基材 4 耐熱合金製固定金具 5,8 断熱耐火物 6 セラミックス部材 7 キャスタブル耐火物 1 Skid rail 3 Rail base material 4 Heat-resistant alloy fixing bracket 5, 8 Insulation refractory material 6 Ceramics member 7 Castable refractory material

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 水冷パイプを有するレール基材の上の被
加熱物と接触する上面に耐熱セラミックス部材を使用
し、上部以外をキャスタブル耐火物で被覆してなる加熱
炉用スキッドレールにおいて、レール基材の上に耐熱合
金製のセラミックス部材固定金具を設け、この固定金具
に断熱材を介してセラミックス部材を固定してなり、固
定金具の一部がキャスタブル耐火物被覆の外に露出する
構造とすることにより、レール上面を薄いセラミックス
部材で構成したことを特徴とするセラミックスを複合し
たスキッドレール。
1. A skid rail for a heating furnace in which a heat-resistant ceramic member is used on the upper surface of a rail base material having a water-cooled pipe that comes into contact with an object to be heated, and a portion other than the upper portion is covered with castable refractory material. A ceramic member fixing bracket made of heat-resistant alloy is provided on the material, and the ceramic member is fixed to this fixing member via a heat insulating material, so that part of the fixing bracket is exposed outside the castable refractory coating. As a result, a skid rail composed of ceramics, characterized in that the upper surface of the rail is made of a thin ceramic member.
【請求項2】 セラミックス部材固定金具として超耐熱
鋳鋼を用い、その温度が1250℃を超えないようにセ
ラミックス部材との間に断熱材を設けた請求項1のスキ
ッドレール。
2. The skid rail according to claim 1, wherein ultra heat-resistant cast steel is used as the metal fitting for the ceramic member, and a heat insulating material is provided between the metal member and the ceramic member so that the temperature does not exceed 1250 ° C.
【請求項3】 レール基材とセラミックス部材固定金具
との間に、部分的に断熱材を設けた請求項1のスキッド
レール。
3. The skid rail according to claim 1, wherein a heat insulating material is partially provided between the rail base material and the ceramic member fixing metal fitting.
JP4371492A 1992-02-28 1992-02-28 Skiddrail with composite ceramics Pending JPH0565529A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4371492A JPH0565529A (en) 1992-02-28 1992-02-28 Skiddrail with composite ceramics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4371492A JPH0565529A (en) 1992-02-28 1992-02-28 Skiddrail with composite ceramics

Publications (1)

Publication Number Publication Date
JPH0565529A true JPH0565529A (en) 1993-03-19

Family

ID=12671476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4371492A Pending JPH0565529A (en) 1992-02-28 1992-02-28 Skiddrail with composite ceramics

Country Status (1)

Country Link
JP (1) JPH0565529A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0861862A3 (en) * 1997-02-28 1999-12-15 Mitsubishi Chemical Corporation Method for reinforcing structures

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54102205A (en) * 1978-01-31 1979-08-11 Kurosaki Refractories Co Skid structure in heating furnace
JPS5576874A (en) * 1978-10-27 1980-06-10 Kitasato Inst:The Novel antibiotic a40a and its preparation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54102205A (en) * 1978-01-31 1979-08-11 Kurosaki Refractories Co Skid structure in heating furnace
JPS5576874A (en) * 1978-10-27 1980-06-10 Kitasato Inst:The Novel antibiotic a40a and its preparation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0861862A3 (en) * 1997-02-28 1999-12-15 Mitsubishi Chemical Corporation Method for reinforcing structures

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