JPH06221766A - Muffle for muffle furnace - Google Patents
Muffle for muffle furnaceInfo
- Publication number
- JPH06221766A JPH06221766A JP2971593A JP2971593A JPH06221766A JP H06221766 A JPH06221766 A JP H06221766A JP 2971593 A JP2971593 A JP 2971593A JP 2971593 A JP2971593 A JP 2971593A JP H06221766 A JPH06221766 A JP H06221766A
- Authority
- JP
- Japan
- Prior art keywords
- butt
- furnace
- muffle
- pine
- metal
- 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
Links
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Tunnel Furnaces (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明はストリツプ材の連続熱
処理等をおこなうマツフル炉に使用されるマツフルに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pineapple used in a pineapple furnace for continuously heat treating strip materials.
【０００２】[0002]
【従来の技術】この種のマツフル炉としては例えば竪形
マツフル炉がある。これらの竪形マツフル炉は、一般に
上向きに走行するストリツプが貫通する円筒形のマツフ
ルを、円筒形の炉本体を貫通する形で吊下げ、炉本体と
マツフルの間の燃焼室内でバ−ナによる燃焼をおこな
い、マツフル内に還元性あるいは無酸化性の雰囲気ガス
を充填して、該雰囲気ガス中でストリツプの光輝焼鈍等
の熱処理をおこなう構成の炉が用いられている。2. Description of the Related Art A vertical pine-furnace furnace is an example of this type of pine-furnace furnace. These vertical pine-furnace furnaces generally hang a cylindrical pine cone through which a strip running upwards penetrates so as to penetrate the cylindrical furnace body, and use a burner in the combustion chamber between the furnace body and the pine cone. A furnace is used in which combustion is performed, a reducing or non-oxidizing atmosphere gas is filled in the pine, and heat treatment such as bright annealing of the strip is performed in the atmosphere gas.
【０００３】そして上記マツフルとしては、金属板を短
尺円筒状に曲げ加工して溶接した円筒要素を多数個直列
に溶接して、長い円筒体としたものを用いており、金属
板の材料としては高温強度のすぐれた耐熱合金であるＮ
ｉ−Ｃｒ−Ｆｅ系合金が用いられている。As the above-mentioned pine cone, a long cylindrical body is used by welding a number of cylindrical elements obtained by bending and welding a metal plate into a short cylindrical shape in series. N, a heat-resistant alloy with excellent high-temperature strength
An i-Cr-Fe based alloy is used.
【０００４】[0004]
【発明が解決しようとする課題】ところで上記マツフル
形成時の各溶接は突合せ溶接の形でおこなわれるが、溶
接部はいわゆる鋳造組織となり、圧延材である金属板
（母材）と比べて強度が落ちる。従つて、母材（金属
板）と同等以上の突合せ溶接継手部の強度を確保するた
めには、母材より高温強度の高い金属材料から成る溶接
棒を使用しなければならない。By the way, each of the above-mentioned welding processes for forming the pineapple is carried out in the form of butt welding. However, the welded portion has a so-called casting structure and has a strength higher than that of a rolled metal plate (base metal). drop down. Therefore, in order to secure the strength of the butt-welded joint portion which is equal to or higher than that of the base metal (metal plate), a welding rod made of a metal material having a high temperature strength higher than that of the base metal must be used.
【０００５】ところがこの溶接棒で形成した溶接金属部
は、マツフル外側の高温燃焼ガスによる酸化雰囲気に曝
されて急速に酸化し、マツフル内側のＮ2 を含む還元性
雰囲気に曝されて窒化して脆化するため、耐久性が劣る
という大きな欠点があつた。However, the weld metal portion formed by this welding rod is exposed to the oxidizing atmosphere by the high temperature combustion gas outside the pine cone and is rapidly oxidized, and is exposed to the reducing atmosphere containing N 2 inside the pine cone and nitrided. Since it becomes brittle, it has a major drawback of being poor in durability.
【０００６】この発明は上記従来の問題点を解決するも
ので、突合せ溶接継手部が長期にわたつて消耗せず、高
強度で長寿命のマツフル炉用マツフルを提供することを
目的とする。The present invention solves the above-mentioned problems of the prior art, and an object of the present invention is to provide a pine cone for a pine-furnace furnace having a high strength and a long life, in which the butt-welded joint is not worn for a long period of time.
【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
に、この発明のマツフル炉用マツフルは、マツフル炉の
炉本体を貫通する円筒形のマツフルにおいて、前記マツ
フルを構成する金属板の突合せ溶接継手部を、前記金属
板より高温強度の高い高強度金属材料により形成すると
ともに、前記突合せ溶接継手部のマツフル外側の表面部
を、前記金属板と同等以上の耐酸化性を有する外側盛金
層で被覆し、前記突合せ溶接継手部のマツフル内側の表
面部を、前記金属板と同等以上の耐窒化性を有する内側
盛金層で被覆したことを特徴とする。In order to achieve the above object, a pineapple for a pineapple furnace according to the present invention is a cylindrical pineapple that penetrates a furnace body of the pineapple furnace. Butt welding of metal plates constituting the pine tree is performed. The joint portion is formed of a high-strength metal material having a higher high-temperature strength than the metal plate, and the surface portion of the butt-welded joint portion outside the pine is an outer plating layer having oxidation resistance equal to or higher than that of the metal plate. The inner surface of the butt-welded joint part inside the pine cone is covered with an inner deposit layer having nitriding resistance equal to or higher than that of the metal plate.
【０００８】[0008]
【作用】この発明のマツフル炉用マツフルにおいては、
高強度金属材料から成る突合せ溶接継手によつて、金属
板自体と同程度以上のマツフルの溶接部の強度が確保さ
れる。また外側盛金層は、突合せ溶接継手部のマツフル
外側の表面部を被覆して、該表面部が燃焼ガス等による
酸化雰囲気に直接接触して酸化により消耗するのを防止
する。さらに内側盛金層は、突合せ溶接継手部のマツフ
ル内側の表面部を被覆して、該表面部が窒素分を含む還
元性雰囲気に直接接触して窒化により消耗するのを防止
する。In the pineapple for pineapple furnace of the present invention,
The butt-welded joint made of a high-strength metal material ensures the strength of the welded portion of the pine cone which is equal to or higher than that of the metal plate itself. Further, the outer metal layer covers the surface of the butt-welded joint outside the pine, and prevents the surface from being directly contacted with an oxidizing atmosphere of combustion gas or the like and being consumed by oxidation. Further, the inner deposit layer covers the surface of the butt-welded joint inside the pine cone and prevents the surface from being directly contacted with a reducing atmosphere containing nitrogen and being consumed by nitriding.
【０００９】[0009]
【実施例】以下図１および図２によりこの発明の一実施
例を説明する。図中、１は竪形マツフル炉で、円筒形の
炉本体２と、この炉本体２を貫通する円筒形のマツフル
３と、このマツフル３の下端部に接続した入口シ−ル装
置４とをそなえて成る。炉本体２は、基礎５に固設した
基台６上に立設され、マツフル３の上端部は架台７によ
り吊下げられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. In the figure, 1 is a vertical pine muffle furnace, which comprises a cylindrical furnace body 2, a cylindrical pine cone 3 penetrating the furnace body 2, and an inlet seal device 4 connected to the lower end of the pine cone 3. Consists of The furnace body 2 is erected on a base 6 fixed to a foundation 5, and the upper end of the pine cone 3 is suspended by a pedestal 7.
【００１０】８はストリツプ９が通過するスリツト状の
装入口、１０は同様な抽出口で、冷却帯を形成するチヤ
ンバ−１１が接続されている。１２は排気用の送風機で
あり、炉本体２の炉壁部には加熱用のバ−ナが設けられ
ているがその図示は省略してある。またマツフル３は図
示しない雰囲気ガス供給源に接続されており、Ｈ2 ：７
５％，Ｎ2 ：２５％の還元性ガス雰囲気中でストリツプ
９の光輝焼鈍をおこなうようになつている。Reference numeral 8 is a slit-shaped charging port through which the strip 9 passes, and 10 is a similar extraction port, to which a chamber 11 forming a cooling zone is connected. Reference numeral 12 is an air blower for exhaust, and a burner for heating is provided on the furnace wall portion of the furnace body 2, but its illustration is omitted. Further, the pineapple 3 is connected to an atmosphere gas supply source (not shown), and H 2 : 7
Bright annealing of strip 9 is performed in a reducing gas atmosphere of 5% and N 2 : 25%.
【００１１】またマツフル３は、多数個の円筒要素３ａ
〜３ｈを直列に並べて突合せ溶接して成る。各円筒要素
３ａ〜３ｈは、約１０００℃に及ぶバ−ナの燃焼ガス温
度に耐えるために、Ｎｉ−Ｃｒ−Ｆｅ系耐熱合金である
インコネル６００（主要成分：Ｎｉ７２％，Ｃｒ１４〜
１７％，Ｆｅ６〜１０％）から成る板材を、短円筒状に
曲げ加工後、長手方向に延びる突合せ線に沿つて突合せ
溶接して成る。なお上方の円筒要素ほど、自重による大
きな引張荷重を受けるため、厚い板材を用いている。Further, the pineapple 3 has a large number of cylindrical elements 3a.
3 to 3h are arranged in series and butt welded. In order to withstand the combustion gas temperature of the burner up to about 1000 ° C., each of the cylindrical elements 3a to 3h is made of Inconel 600 (main component: Ni 72%, Cr 14
17%, Fe6 to 10%), a plate material is bent into a short cylindrical shape, and then butt-welded along a butt line extending in the longitudinal direction. Since the upper cylindrical element receives a large tensile load due to its own weight, a thick plate material is used.
【００１２】図２は各溶接部のうち、円筒要素３ｃと３
ｄ間の突合せ溶接部（胴部周継手部）を示すもので、母
材であるインコネル６００よりも高強度のインコネル６
１７（主要成分：Ｎｉ５２％，Ｃｒ２２％，Ｃｏ１２．
５％，Ｍｏ９％，Ａｌ１．２％，Ｆｅ１．５％）から成
る溶接棒を用いて、母材よりも高温強度の高い溶接金属
から成る突合せ溶接継手部２０を形成してある。FIG. 2 shows the cylindrical elements 3c and 3 of each weld.
FIG. 3 shows a butt welded portion (drum peripheral joint portion) between d and has a higher strength than that of the base material Inconel 600.
17 (main components: Ni52%, Cr22%, Co12.
5%, 9% Mo, 1.2% Al, 1.5% Fe) are used to form the butt-welded joint 20 made of a weld metal having a higher high-temperature strength than the base metal.
【００１３】そしてこの突合せ溶接継手部２０のマツフ
ル外側（図中、符号Ｘで示す）の表面部２１上には、該
継手部の構成材料（インコネル６１７）および円筒要素
構成材（インコネル６００）よりも耐酸化性がすぐれた
インコネル６０１（主要成分：Ｎｉ５８〜６３％，Ｃｒ
２１〜２５％，Ａｌ１．０〜１．７％，Ｆｅ８〜１７
％）から成る溶接棒を用いて肉盛溶接をおこない、この
肉盛層である外側盛金層２２により、表面部２１を被覆
してある。On the outer surface 21 of the butt-welded joint 20 outside the pine cone (indicated by reference numeral X in the drawing), the constituent material of the joint (Inconel 617) and the cylindrical element constituent (Inconel 600) are used. Inconel 601 with excellent oxidation resistance (main components: Ni 58-63%, Cr
21-25%, Al 1.0-1.7%, Fe 8-17
%) Is used to perform the overlay welding, and the surface portion 21 is covered with the outer overlay metal layer 22 which is the overlay layer.
【００１４】また突合せ溶接継手部２０のマツフル内側
（図中、符号Ｙで示す）の表面部２３上には、母材（イ
ンコネル６００）に相当する成分および耐窒化性を有す
るＦＭ６２（主要成分：Ｎｉ７０％，Ｃｒ１４〜１７
％，Ｆｅ６〜１０％）から成る溶接棒を用いて肉盛溶接
をおこない、この肉盛層である内側盛金層２４により、
表面部２３を被覆してある。Further, on the surface portion 23 inside the pine welded portion of the butt welded joint portion 20 (indicated by a symbol Y in the drawing), a component corresponding to the base material (Inconel 600) and an nitriding resistant FM 62 (main component: Ni 70%, Cr 14-17
%, Fe6 to 10%) is used to perform overlay welding, and the inner overlay metal layer 24, which is the overlay layer,
The surface portion 23 is covered.
【００１５】なお図２は１箇所の突合せ溶接継手部を示
すものであるが、マツフル３を構成する他の各円筒要素
の端部同士の突合せ溶接部（胴部周継手）、および各円
筒要素自体の長手方向に延びる胴部長手継手も、すべて
図２と同様な材料および層構成による継手構造を有する
ものである。Although FIG. 2 shows a butt-welded joint at one place, the butt-welded portion (body circumferential joint) between the ends of the other cylindrical elements constituting the pine cone 3 and each cylindrical element. All the longitudinal body joints extending in the longitudinal direction of the body themselves have a joint structure made of the same material and layer structure as in FIG.
【００１６】上記構成の竪形マツフル炉１の操業時に
は、マツフル３の外側は燃焼ガスによる高温の酸化雰囲
気に曝され、内側は窒素ガスを含む還元性雰囲気に曝さ
れるが、耐酸化性のすぐれた外側盛金層２２が突合せ溶
接継手部２０のマツフル外側の表面部２１を被覆し、突
合せ溶接継手部２０の構成材（インコネル６１７）中の
Ｍｏ分に起因する酸化消耗を防止し、また耐窒化性のす
ぐれた内側盛金層２４が突合せ溶接継手部２０のマツフ
ル内側の表面部２３を被覆し、突合せ溶接継手部２０の
構成材（インコネル６１７）中のＡｌ分の窒化に起因す
る脆化消耗を防止する。During operation of the vertical pine-furnace furnace 1 having the above-mentioned structure, the outside of the pine-furnace 3 is exposed to a high temperature oxidizing atmosphere of combustion gas, and the inside is exposed to a reducing atmosphere containing nitrogen gas. The excellent outer plating layer 22 covers the surface 21 of the butt-welded joint portion 20 on the outer side of the pine, and prevents oxidative consumption due to Mo in the constituent material (Inconel 617) of the butt-welded joint portion 20, and The inner deposit layer 24 having excellent nitriding resistance covers the surface 23 of the butt-welded joint portion 20 on the inner side of the pine, and is fragile due to the nitriding of the Al content in the constituent material (Inconel 617) of the butt-welded joint portion 20. Prevent wear and tear.
【００１７】また、上記実施例では溶接継手部２０のマ
ツフル外側の表面部２１上の外側盛金層２２を母材より
も耐酸化性に優れた溶接棒により形成したが、これは母
材と同じ溶接棒（インコネル６００）により溶接継手部
２０のマツフル外側の表面部盛金層を形成した場合、マ
ツフル外側の表面部２１上の外側盛金層２２の表面に形
成される不動態保護膜は薄く、圧延材である母材表面の
不動態保護膜は厚いので、マツフル外側の表面部２１上
の外側盛金層２２の耐酸化性は圧延材と比べて落ちるこ
とが予想されるからである。In the above embodiment, the outer metal layer 22 on the surface 21 of the welded joint 20 on the outer side of the pine cone is formed of a welding rod having a higher oxidation resistance than the base metal. When the surface weld metal layer outside the pine cone of the welded joint 20 is formed by the same welding rod (Inconel 600), the passivation protective film formed on the surface of the outer weld metal layer 22 on the surface portion 21 outside the pine cone is This is because the passivation protective film on the surface of the base material as a rolled material is thin and thick, so that it is expected that the oxidation resistance of the outer plating layer 22 on the surface portion 21 on the outside of the pineru will be lower than that of the rolled material. .
【００１８】この発明は上記実施例に限定されるもので
はなく、たとえばマツフル３の円筒要素および溶接部の
各材料は上記以外のものとしてもよく、また突合せ溶接
部の開先は、マツフルの外側に向つて開く開先形状とし
てもよい。The present invention is not limited to the above-described embodiment. For example, the materials of the cylindrical element and the welded portion of the pine cone 3 may be other than those described above, and the groove of the butt welded portion is the outside of the pine cone. The groove shape may be opened toward.
【００１９】[0019]
【発明の効果】以上説明したようにこの発明によれば、
マツフルの突合せ溶接継手部を形成する高強度金属材料
から成る溶接金属は、酸化雰囲気に曝されるマツフル外
側の表面部を耐酸化性がすぐれた外側盛金層により被覆
され、還元性雰囲気に曝されるマツフル内側の表面部を
耐窒化性がすぐれた内側盛金層により被覆されているの
で、強度が高く寿命の長いマツフルが得られる。As described above, according to the present invention,
The weld metal made of high-strength metal material that forms the butt-welded joint of the pine cone is coated with an outer plating layer with excellent oxidation resistance on the outer surface of the pine tree that is exposed to the oxidizing atmosphere and exposed to the reducing atmosphere. Since the inner surface of the pineapple is covered with an inner deposit layer having excellent nitriding resistance, a pineapple having high strength and long life can be obtained.
【図１】この発明の一実施例を示す竪形マツフル炉の縦
断面図である。FIG. 1 is a vertical sectional view of a vertical pine full furnace showing an embodiment of the present invention.
【図２】図１のＡ部拡大縦断面図である。FIG. 2 is an enlarged vertical sectional view of a part A in FIG.
１…竪形マツフル炉、２…炉本体、３…マツフル、３ａ
〜３ｈ…円筒要素、２０…突合せ溶接継手部、２１…表
面部、２２…外側盛金層、２３…表面部、２４…内側盛
金層。1 ... Vertical pine full furnace, 2 ... Furnace body, 3 ... Matsuful, 3a
~ 3h ... Cylindrical element, 20 ... Butt welded joint part, 21 ... Surface part, 22 ... Outer metal layer, 23 ... Surface part, 24 ... Inner metal layer.
Claims (1)
マツフルにおいて、前記マツフルを構成する金属板の突
合せ溶接継手部を、前記金属板より高温強度の高い高強
度金属材料により形成するとともに、前記突合せ溶接継
手部のマツフル外側の表面部を、前記金属板と同等以上
の耐酸化性を有する外側盛金層で被覆し、前記突合せ溶
接継手部のマツフル内側の表面部を、前記金属板と同等
以上の耐窒化性を有する内側盛金層で被覆したことを特
徴とするマツフル炉用マツフル。1. In a cylindrical pine cone that penetrates the furnace body of a matsufur furnace, a butt weld joint part of a metal plate forming the matsufur is formed of a high-strength metal material having a high temperature strength higher than that of the metal plate, and The surface of the butt-welded joint part outside the pine cone is covered with an outer plating layer having an oxidation resistance equal to or higher than that of the metal plate, and the surface of the butt-welded joint part inside the pine cone is the metal plate. A pineapple for a matsuful furnace characterized by being coated with an inner deposit layer having nitriding resistance equal to or higher than that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2971593A JPH06221766A (en) | 1993-01-25 | 1993-01-25 | Muffle for muffle furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2971593A JPH06221766A (en) | 1993-01-25 | 1993-01-25 | Muffle for muffle furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06221766A true JPH06221766A (en) | 1994-08-12 |
Family
ID=12283812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2971593A Pending JPH06221766A (en) | 1993-01-25 | 1993-01-25 | Muffle for muffle furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06221766A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010032769A1 (en) * | 2008-09-17 | 2010-03-25 | エア・ウォーター株式会社 | Heat-treatment furnace, method of heat treatment, and method of using heat-treatment furnace |
| JP2010070844A (en) * | 2009-02-24 | 2010-04-02 | Air Water Inc | Method for using heat treatment furnace, method of heat treatment, and heat treatment furnace |
-
1993
- 1993-01-25 JP JP2971593A patent/JPH06221766A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010032769A1 (en) * | 2008-09-17 | 2010-03-25 | エア・ウォーター株式会社 | Heat-treatment furnace, method of heat treatment, and method of using heat-treatment furnace |
| JP2010070844A (en) * | 2009-02-24 | 2010-04-02 | Air Water Inc | Method for using heat treatment furnace, method of heat treatment, and heat treatment furnace |
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