JPH03188222A - Hearth roller for heat treatment furnace - Google Patents
Hearth roller for heat treatment furnaceInfo
- Publication number
- JPH03188222A JPH03188222A JP1322670A JP32267089A JPH03188222A JP H03188222 A JPH03188222 A JP H03188222A JP 1322670 A JP1322670 A JP 1322670A JP 32267089 A JP32267089 A JP 32267089A JP H03188222 A JPH03188222 A JP H03188222A
- Authority
- JP
- Japan
- Prior art keywords
- heat treatment
- porosity
- hearth roller
- glassy carbon
- hearth
- 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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 229910021397 glassy carbon Inorganic materials 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 13
- 230000003647 oxidation Effects 0.000 abstract description 16
- 238000007254 oxidation reaction Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 5
- 238000002441 X-ray diffraction Methods 0.000 abstract description 4
- 239000007849 furan resin Substances 0.000 abstract description 4
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 abstract description 4
- 238000003763 carbonization Methods 0.000 abstract description 3
- 239000005011 phenolic resin Substances 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract description 2
- 229920001568 phenolic resin Polymers 0.000 abstract description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000003575 carbonaceous material Substances 0.000 description 28
- 239000002245 particle Substances 0.000 description 10
- 239000011148 porous material Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Landscapes
- Rolls And Other Rotary Bodies (AREA)
- Carbon And Carbon Compounds (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は鋼板の送行を案内する熱処理炉用ハースロール
に関し、特に珪素鋼板ストリップの連続熱処理、Ｎ２−
Ｎ２−Ｎ２０系などの高温、酸化性雰囲気中における焼
成条件下に好適に使用できる熱処理炉用ハースロールに
関わる。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hearth roll for a heat treatment furnace that guides the conveyance of a steel plate, and in particular to continuous heat treatment of silicon steel plate strip, N2-
The present invention relates to a hearth roll for a heat treatment furnace that can be suitably used under firing conditions in an oxidizing atmosphere at high temperatures such as N2-N20 system.
［従来の技術と課題］
従来、−膜内な熱処理炉用ハースロールとしては、耐熱
合金、アルミナや炭化珪素等のセラミックス、あるいは
炭素質または黒鉛質の炭素材料が使用されてきた。[Prior Art and Problems] Conventionally, heat-resistant alloys, ceramics such as alumina and silicon carbide, or carbonaceous or graphitic carbon materials have been used as hearth rolls for internal heat treatment furnaces.
しかしながら、こうした材料を用いた場合、次のような
問題点を有する。However, when such materials are used, there are the following problems.
■耐熱合金製のハースロールの場合、通常８００℃以上
の高温焼鈍で用いると、ロール表面に鋼板からの付着物
が堆積して鋼板にピックアップと呼ばれる押しきずが発
生しやすい。■When a hearth roll made of a heat-resistant alloy is used for high-temperature annealing at a temperature of 800°C or higher, deposits from the steel plate accumulate on the roll surface, which tends to cause scratches called pickups on the steel plate.
■セラミック製のハースロールの場合、上記■のように
押しきずが発生しやすい他、材質が硬すぎるため傷やか
き傷をつけやすい。■In the case of ceramic hearth rolls, in addition to being prone to press scratches as described in ■ above, the material is too hard, so it is easy to get scratches and scratches.
一方、炭素材料製のハースロールの場合、優れた耐熱性
と自己潤滑性に加え、セラミックスの場合のようなすり
きずやかききずの恐れがなく、適度な硬さをもち、鋼板
を傷つけにくい熱処理炉用ハースロールとして好適な特
性を備えている。しかし、この炭素材料であっても、高
温、酸化性雰囲気下で使用される場合には次に述べる問
題点を有する。即ち、
第１に、炭素材料は炭素質に比べて高い耐酸化性を呈す
る黒鉛質においても、Ｎ２０を含む９００℃以上の高温
、酸化性雰囲気下では容品に酸化消耗して微細な孔隙が
急激に拡大して、その表面が凹凸になる。On the other hand, hearth rolls made of carbon materials not only have excellent heat resistance and self-lubricating properties, but also have no fear of scratches or scratches like ceramics, have appropriate hardness, and are heat treated to prevent damage to steel sheets. It has characteristics suitable for use as a hearth roll for furnaces. However, even this carbon material has the following problems when used at high temperatures and in an oxidizing atmosphere. First, even graphite, which exhibits higher oxidation resistance than carbonaceous materials, can be oxidized and consumed in an oxidizing atmosphere containing N20 at a high temperature of 900°C or higher, creating fine pores. It expands rapidly and its surface becomes uneven.
第２に、ハースロールとして使用した場合、高温になる
と鉄の凝集粒子塊がロール面に植え込まれて局部的な凸
部が生じる。以下、この種の炭素材料について詳述する
。Second, when used as a hearth roll, when the temperature rises, aggregated iron particles become embedded in the roll surface, creating local convexities. This type of carbon material will be described in detail below.
上記炭素材料は、コークスを粉砕して粉末状の炭素材料
を作製し、この粉末状の炭素材料に適宜のバインダーを
添加して混練し、混線材料を成形して成形索体を作製し
、成形素体を焼成し、更に焼成素体を熱処理によって黒
鉛化する事により作製されていた。そのため、成形時の
空隙や熱処理時の揮発成分の散逸等により１０〜３０％
の気孔を有する炭素材料が得られる。また、骨材粒子の
大きさやバインダーの種類、製造工程等によって気孔の
大きさや分布が異なり、物性に影響を与えていた。従っ
て、気孔の多いこれらの炭素材料からできているハース
ロール面の凹凸及び局部的な凸部はいずれも、このロー
ル面に沿って通板する鋼板面に転写されてピックアップ
を発生させる原因となり、鋼板の商品価値を著しく損な
う。しかも、このようにロール表面性状が不良になった
ものはもはやハースロールとして使用できず、その耐用
寿命も短い。The above carbon material is produced by pulverizing coke to produce a powdered carbon material, adding an appropriate binder to this powdered carbon material and kneading it, and molding the mixed wire material to produce a molded cable body. It was produced by firing an element body and then graphitizing the fired element body through heat treatment. Therefore, due to voids during molding and the dissipation of volatile components during heat treatment, the
A carbon material having pores is obtained. In addition, the size and distribution of pores vary depending on the size of aggregate particles, type of binder, manufacturing process, etc., which affects physical properties. Therefore, the irregularities and local convexities on the hearth roll surface made of these carbon materials with many pores are transferred to the surface of the steel sheet that is passed along the roll surface, causing pickup. Significantly reduces the commercial value of steel sheets. Moreover, rolls with poor surface properties can no longer be used as hearth rolls, and their useful life is short.
こうしたことから、従来より炭素材料の耐酸化性の向上
について種々の改善手段が講じられている。例えば、原
料及び成形法を工夫して炭素材料そのものを緻密なもの
にする方法、あるいはコロイドシリカ、酸化クロム、ホ
ウ素化合物及び燐酸アルミニウムなどの溶液または懸濁
液を炭素材料の細孔部に含浸、充填させた後乾燥させる
方法等が知られている。これらの方法は、炭素材料内部
の開気孔を減らす事、及び炭素材料表面にガラス膜を形
成して耐酸化性向上をねらったものである。For this reason, various improvement measures have been taken to improve the oxidation resistance of carbon materials. For example, methods for making the carbon material itself dense by devising raw materials and molding methods, or impregnating the pores of the carbon material with a solution or suspension of colloidal silica, chromium oxide, boron compounds, aluminum phosphate, etc. A method of filling and then drying is known. These methods aim at reducing open pores inside the carbon material and forming a glass film on the surface of the carbon material to improve oxidation resistance.
しかし、実際は、炭素材料内部の開気孔中に十分充填で
きず、また表面のガラス層についても炭素材料とガラス
層の熱膨張係数が異なる為、膜剥がれ等をおこし十分満
足のいく結果は得られていない。更に、表面に形成され
たガラス層もやはり酸化消耗してなくなるため、使用し
ていくうちに炭素材料の地肌が露出し直接雰囲気にさら
され、また炭素粒子の脱落も起こる。そのため、ハース
ロール面に局部的な凹凸が強調されてしまう等の問題も
ある。However, in reality, it is not possible to fill the open pores inside the carbon material sufficiently, and the glass layer on the surface also has a different thermal expansion coefficient between the carbon material and the glass layer, which may cause the film to peel off, making it impossible to obtain fully satisfactory results. Not yet. Furthermore, the glass layer formed on the surface is also oxidized and consumed, so as it is used, the surface of the carbon material is exposed and directly exposed to the atmosphere, and carbon particles also fall off. Therefore, there is a problem that local irregularities on the hearth roll surface are accentuated.
つまり、このように改質した炭素材料であっても、本発
明で主に対象とする使用条件即ち９００℃以上の高温で
Ｎ２−Ｎ２−Ｎ２０系のごとき酸化性雰囲気下でハース
ロールとして長時間使用した場合には、いずれも十分満
足できる程の耐酸化性は示さず、良好なピックアツプ性
を確保することができない。In other words, even if the carbon material has been modified in this way, it can be used as a hearth roll for a long period of time under the conditions of use that are the main target of the present invention, that is, at high temperatures of 900°C or higher and in an oxidizing atmosphere such as N2-N2-N20 system. When used, none of them exhibits sufficiently satisfactory oxidation resistance, making it impossible to ensure good pick-up properties.
本発明は上記事情を考慮してなされたもので、耐熱性、
化学的安定性、耐薬品性に優れる他、均質、高硬度、耐
酸化性、低気孔率等の優れた特性を有し、良好な耐ピツ
クアツプ性を確保しえる熱処理炉用ハースロールを提供
することを目的とする。The present invention was made in consideration of the above circumstances, and has heat resistance,
To provide a hearth roll for heat treatment furnaces that has excellent chemical stability and chemical resistance, as well as excellent properties such as homogeneity, high hardness, oxidation resistance, and low porosity, and can ensure good pick-up resistance. The purpose is to
［課題を解決するための手段と作用］
本発明は、鋼板の送行を案内する熱処理炉用ノ＼−スロ
ールにおいて、少なくとも鋼板と接触する部分が熱硬化
性樹脂を炭化、焼成により気孔率が０．０２〜０．２０
％に調製され、しかも結晶子がＸ線回折により検出され
ないガラス状カーボンからなることを特徴とする熱処理
炉用ハースロールである。[Means and effects for solving the problems] The present invention provides a nozzle roll for a heat treatment furnace that guides the conveyance of a steel plate, in which at least the portion that contacts the steel plate has a thermosetting resin that is carbonized and fired to reduce the porosity to 0. .02~0.20
% and whose crystallites are not detected by X-ray diffraction.
つまり、より具体的には、出発原料として流動性をもた
せるよう重合させた熱硬化性樹脂を成形し硬化し不活性
雰囲気（ヘリウム、アルゴン、窒素、水素、ハロゲンか
らなる群より選ばれた少なくとも１種の気体よりなる雰
囲気あるいは減圧。More specifically, a thermosetting resin polymerized to give fluidity as a starting material is molded and cured in an inert atmosphere (at least one selected from the group consisting of helium, argon, nitrogen, hydrogen, and halogen). An atmosphere or vacuum consisting of a species gas.
真空または大気を遮断した状態の雰囲気）中で炭化焼成
し、その後高温熱処理を施したガラス状カボン材°料に
おいて気孔率が０．０２〜０．２０％で存在する事を特
徴とする。The glass-like carbon material is carbonized and fired in a vacuum or an atmosphere blocked from the atmosphere, and then subjected to high-temperature heat treatment, and is characterized by having a porosity of 0.02 to 0.20%.
本発明に係るガラス状カーボンは、三次元網目構造から
なり、黒鉛構造からなる一般の炭素材料がもつ耐熱性、
化学的安定性、耐薬品性等の特性に加えて、均質、高硬
度、耐酸化性、低気孔率。The glassy carbon according to the present invention has a three-dimensional network structure, and has the heat resistance of a general carbon material consisting of a graphite structure.
In addition to properties such as chemical stability and chemical resistance, it is homogeneous, high hardness, oxidation resistance, and low porosity.
粒子の脱落がないなどの優れた特性を持つ材料である。This material has excellent properties such as no particles falling off.
本発明において、出発原料として流動性のある熱硬化性
樹脂を使用するのは、骨材そのものを樹脂粉末にし成形
した後焼成を行った場合、樹脂粉体を使用するため粒子
間に粒界が存在し、特性特に機械的強度が低下し、気孔
率が増加するとともに、カーボン粒子が脱落し易いから
である。In the present invention, a fluid thermosetting resin is used as a starting material because when the aggregate itself is made into resin powder and then fired, the grain boundaries between the particles are formed because the resin powder is used. This is because carbon particles tend to fall off as well as properties such as mechanical strength decrease and porosity increase.
本発明において、気孔率を０．０２〜０．２０％と規定
するのは、気孔率が０．０２％未満ではガラス状カーボ
ンが非常に緻密なため何回ものサイクルで使用した場合
、熱応力の蓄積により割れてライフ的に好ましくなく、
一方気孔率が０．２０％を越えると比表面積が増大する
ことにより酸化特性１機械強度が低下するからである。In the present invention, the porosity is defined as 0.02 to 0.20% because if the porosity is less than 0.02%, the glassy carbon becomes very dense, so if it is used for many cycles, it will suffer from thermal stress. It cracks due to accumulation of water, which is not good for life.
On the other hand, if the porosity exceeds 0.20%, the specific surface area increases and the oxidation properties 1 mechanical strength decreases.
本発明において、熱硬化性樹脂を硬化し炭化焼成して得
られしかも結晶子がＸ線回折で検出されないガラス状カ
ーボンとしたのは、結晶子がＸ線回折で検出されると、
粒子界面が存在し特性特に強度低下や比表面積の増加に
よる耐酸化特性の低下、更にはカーボン粒子が脱落しや
すい等の原因となるからである。In the present invention, the glass-like carbon obtained by curing and carbonizing the thermosetting resin and whose crystallites are not detected by X-ray diffraction is because when the crystallites are detected by X-ray diffraction,
This is because the existence of particle interfaces causes a decrease in properties, particularly strength, a decrease in oxidation resistance due to an increase in specific surface area, and furthermore, carbon particles tend to fall off.
本発明に係る熱硬化性樹脂としては、フラン樹脂、フェ
ノール樹脂、エポキシ樹脂、不飽和ポリエステル樹脂、
ユリア樹脂、メラミン樹脂、アルキッド樹脂、キシレン
樹脂等を挙げることができ、本発明の条件に合致する樹
脂はそのままあるいはブレンドまたは変性することによ
り用いられる。Thermosetting resins according to the present invention include furan resins, phenolic resins, epoxy resins, unsaturated polyester resins,
Examples include urea resin, melamine resin, alkyd resin, xylene resin, etc. Resins that meet the conditions of the present invention can be used as they are or after being blended or modified.
これは、上記熱硬化性樹脂は硬化前に目的とするガラス
状カーボン材料の用途に応じた各種の成形後に不活性雰
囲気中４５０℃以上、好ましくは８００℃以上、より好
ましくは１０００℃以上の温度で炭化焼成して目的とす
るガラス状カーボンとなるためである。この場合、炭化
焼成時間は焼成する温度により適宜選択するとよい。焼
成温度が４５０℃未満の場合、十分炭化せず気孔率が高
くなり、目的とするガラス状カーボン材料としての性質
を与えることが困難となる。This means that the thermosetting resin is heated at a temperature of 450°C or higher, preferably 800°C or higher, more preferably 1000°C or higher in an inert atmosphere after various moldings depending on the intended use of the glassy carbon material before curing. This is because it is carbonized and fired to become the desired glassy carbon. In this case, the carbonization firing time may be appropriately selected depending on the firing temperature. If the firing temperature is less than 450° C., carbonization will not be sufficient and the porosity will increase, making it difficult to provide the desired properties as a glassy carbon material.
本発明によれば、一般炭素材料がもつ耐熱性。According to the present invention, the heat resistance of general carbon materials.
化学的安定性、耐薬品性等の特性に加えて、均質。In addition to properties such as chemical stability and chemical resistance, it is homogeneous.
高硬度、耐酸化性、低気孔率等の優れた特性をもち、熱
処理炉用ハースロールとして優れた効果を有する。It has excellent properties such as high hardness, oxidation resistance, and low porosity, and is effective as a hearth roll for heat treatment furnaces.
以下、本発明の実施例について比較例とともに製造方法
を併記して説明する。Examples of the present invention will be described below along with comparative examples and manufacturing methods.
［実施例］
まず、例えばフェノール樹脂やフラン樹脂等の熱硬化性
樹脂に触媒例えばｐ−トルエンスルホン酸を添加し、脱
泡処理し、成形した後、２００℃で硬化させた。次に、
こうして得られた硬化体を不活性雰囲気中で炭化焼成し
熱硬化性樹脂をガラス状カーボンに転換した後、更に２
０００℃で熱処理し、気孔率が０．０２〜０．２０％で
存在するガラス状カーボンで形成された熱処理炉用ハー
スロールを得た。[Example] First, a catalyst such as p-toluenesulfonic acid was added to a thermosetting resin such as a phenol resin or a furan resin, followed by defoaming treatment, molding, and curing at 200°C. next,
The thus obtained cured product was carbonized and fired in an inert atmosphere to convert the thermosetting resin into glassy carbon, and then
A hearth roll for a heat treatment furnace made of glassy carbon having a porosity of 0.02 to 0.20% was obtained by heat treatment at 0.000°C.
［比較例１］
粉末状の熱硬化性樹脂例えばフラン樹脂に１５０℃でホ
ットプレスを施し硬化体を得た。次に、この硬化体を不
活性雰囲気中で炭化焼成し熱硬化性樹脂をガラス状カー
ボンに転換した後、更に２０００℃で熱処理して気孔率
が０．２％を越えて存在するガラス状カーボンで形成さ
れた熱処理炉用ハースロールを得た。[Comparative Example 1] A powdered thermosetting resin, such as a furan resin, was hot pressed at 150° C. to obtain a cured product. Next, this hardened body is carbonized and fired in an inert atmosphere to convert the thermosetting resin into glassy carbon, and then further heat-treated at 2000°C to form glassy carbon with a porosity exceeding 0.2%. A hearth roll for a heat treatment furnace was obtained.
［比較例２］
まず、含浸液として燐酸水溶液（濃度＝７０％）にがさ
比重１．６４の炭素材料を浸漬し、約１Ｏｎ＋＋ｉＨｇ
まで減圧した状態で２時間保持した。次に、５Ｋｇ／ｃ
ＩＩ２に加圧して５時間保つことにより、炭素材料の開
気孔中に含浸液を充填させた。つづいて、これらの含浸
液処理料を３００℃まで徐々に加熱して脱水した後、Ｎ
２ついでＨ２雰囲気中において９００℃、１０時間の脱
りん処理を施し、熱処理炉用ハースロールを得た。[Comparative Example 2] First, a carbon material with a specific gravity of 1.64 was immersed in a phosphoric acid aqueous solution (concentration = 70%) as an impregnating liquid, and the carbon material had a specific gravity of about 1 On++iHg.
The pressure was reduced to 100°C and maintained for 2 hours. Next, 5Kg/c
By applying pressure to II2 and maintaining it for 5 hours, the impregnating liquid was filled into the open pores of the carbon material. Subsequently, these impregnating liquid treatment materials were gradually heated to 300°C to dehydrate them, and then N
2. Next, dephosphorization treatment was performed at 900° C. for 10 hours in an H2 atmosphere to obtain a hearth roll for a heat treatment furnace.
［比較例３〕
燐酸亜鉛水溶液（ＺｎＯ： Ｐ２０．のモル比−〇、１
：１．濃度３０％）の含浸処理を施した炭素材料につい
ても同様の熱処理を行い熱処理炉ハースロールを得た。[Comparative Example 3] Molar ratio of zinc phosphate aqueous solution (ZnO: P20. -〇, 1
:1. The carbon material impregnated with a concentration of 30% was also subjected to the same heat treatment to obtain a heat treatment furnace hearth roll.
しかるに、前述した実施例、比較例１〜３で得られたハ
ースロールについて、水素雰囲気で１０００℃に５時間
保持した時の酸化消耗量並びに温度９００℃、水素−窒
索一水雰囲気下で珪素鋼板の焼鈍処理に約７５０時間使
用下役の外観と性状を、後掲する第１表に示す。However, regarding the hearth rolls obtained in the above-mentioned Examples and Comparative Examples 1 to 3, the amount of oxidation consumption when held at 1000°C for 5 hours in a hydrogen atmosphere, and the loss of silicon at a temperature of 900°C under a hydrogen-nitrogen monohydric atmosphere. The appearance and properties of the servant used for approximately 750 hours in annealing a steel plate are shown in Table 1 below.
第１表により、比較例２，３については、酸化消耗量が
多く、ハースロールとして使用した場合表面が不均一な
消耗を示し鉄粉凝集粒子塊の植え込みがある事が確認で
きた。比較例１については、酸化消耗量が改善されてい
るが、ハースロールとして長時間の使用となると、表面
が不均一な酸化消耗を示し、わずかではあるが鉄粉凝集
粒子塊の植え込みがあり、この場合でもやはり十分改善
されているとはいえない。これらに対し、実施例では、
優れた耐酸化性を示し、使用後のハースロール表面につ
いても十分良好な結果が得られた。From Table 1, it was confirmed that Comparative Examples 2 and 3 had a large amount of oxidation consumption, and when used as a hearth roll, the surface showed uneven consumption and had iron powder agglomerated particle clusters embedded therein. Regarding Comparative Example 1, the amount of oxidation consumption has been improved, but when used as a hearth roll for a long time, the surface shows uneven oxidation consumption, and there is a slight implantation of iron powder agglomerated particles. Even in this case, it cannot be said that there has been a sufficient improvement. In contrast, in the example,
It showed excellent oxidation resistance, and sufficiently good results were obtained on the surface of the hearth roll after use.
なお、ガラス状カーボンは熱処理炉用ハースロールの鋼
材と接触するため面のみに形成したとしても、（例えば
従来のハースロールの表面に均一な長さのガラス状カー
ボンを形成したもの）十分に効果がある事が確かめられ
た。Note that glassy carbon is in contact with the steel material of the hearth roll for heat treatment furnaces, so even if it is formed only on the surface (for example, glassy carbon of a uniform length is formed on the surface of a conventional hearth roll), it is sufficiently effective. It was confirmed that there is.
［発明の効果］
以上詳述した如く本発明によれば、耐熱性、化学的安定
性、耐薬品性に優れる他、均質、高硬度。[Effects of the Invention] As detailed above, according to the present invention, in addition to being excellent in heat resistance, chemical stability, and chemical resistance, it is homogeneous and has high hardness.
耐酸化性、低気孔率等の優れた特性を有し、良好な耐ピ
ツクアツプ性を確保しえる熱処理炉用ハスロールを提供
できる。It is possible to provide a lotus roll for a heat treatment furnace that has excellent properties such as oxidation resistance and low porosity, and can ensure good pick-up resistance.
Claims (1)
、少なくとも鋼板と接触する部分が熱硬化性樹脂を炭化
、焼成により気孔率が０．０２〜０．２０％に調製され
、しかも結晶子がＸ線回折により検出されないガラス状
カーボンからなることを特徴とする熱処理炉用ハースロ
ール。In a hearth roll for a heat treatment furnace that guides the conveyance of a steel plate, at least the portion that contacts the steel plate has a thermosetting resin carbonized and fired to have a porosity of 0.02 to 0.20%, and the crystallites are resistant to X-rays. A hearth roll for heat treatment furnaces characterized by being made of glassy carbon that cannot be detected by diffraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1322670A JPH03188222A (en) | 1989-12-14 | 1989-12-14 | Hearth roller for heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1322670A JPH03188222A (en) | 1989-12-14 | 1989-12-14 | Hearth roller for heat treatment furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03188222A true JPH03188222A (en) | 1991-08-16 |
Family
ID=18146297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1322670A Pending JPH03188222A (en) | 1989-12-14 | 1989-12-14 | Hearth roller for heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03188222A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190210915A1 (en) * | 2018-01-09 | 2019-07-11 | Chung-Ang University Industry-Academic Cooperation Foundation | Glassy carbon roll-type mold manufacturing method for fine pattern formation, and glassy carbon roll-type mold manufactured by the method |
-
1989
- 1989-12-14 JP JP1322670A patent/JPH03188222A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190210915A1 (en) * | 2018-01-09 | 2019-07-11 | Chung-Ang University Industry-Academic Cooperation Foundation | Glassy carbon roll-type mold manufacturing method for fine pattern formation, and glassy carbon roll-type mold manufactured by the method |
| US10654083B2 (en) * | 2018-01-09 | 2020-05-19 | Chung-Ang University Industry-Academic Cooperation Foundation | Glassy carbon roll-type mold manufacturing method for fine pattern formation, and glassy carbon roll-type mold manufactured by the method |
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