JPH07277862A - Abrasion resistant carbon roll and its production - Google Patents
Abrasion resistant carbon roll and its productionInfo
- Publication number
- JPH07277862A JPH07277862A JP6093875A JP9387594A JPH07277862A JP H07277862 A JPH07277862 A JP H07277862A JP 6093875 A JP6093875 A JP 6093875A JP 9387594 A JP9387594 A JP 9387594A JP H07277862 A JPH07277862 A JP H07277862A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- carbon
- metal
- layer
- resistant carbon
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
- C04B41/5057—Carbides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00577—Coating or impregnation materials applied by spraying
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Products (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱処理炉の搬送用や、
ロール冷却、あるいは通電加熱に用いられる耐摩耗性カ
ーボンロールおよびその製造方法に関し、特に、高温の
金属材と接触しても温度分布に基づくサーマルクラウン
が発生せず、耐摩耗性に優れるカーボンロールおよびそ
の製造方法に関する。BACKGROUND OF THE INVENTION The present invention relates to a heat treatment furnace for transportation,
The present invention relates to a wear-resistant carbon roll used for roll cooling or electric heating and a method for producing the same, and in particular, a carbon roll that does not generate a thermal crown based on the temperature distribution even when it comes into contact with a high-temperature metal material, and has excellent wear resistance, and The manufacturing method is related.
【０００２】[0002]
【従来の技術】金属の焼鈍、例えば冷延鋼板の連続焼鈍
で使用される炉内のハースロールは、炉の雰囲気温度が
高く接触する鋼板が雰囲気温度より低温の場合、ロール
の中央部は温度が低くロールのエッジの方が高温にな
り、温度分布がつく。この温度分布に応じ、ロールのプ
ロフィールには、熱膨張により中央がへこみエッジが高
い凹型のクラウンを生じる。逆に、炉の雰囲気温度より
高温の鋼板と接触する場合や、加熱された鋼板を冷却す
るために使用される冷却ロール、あるいは通電加熱に使
われる通電ロール、押さえロールなどはロール温度が鋼
板よりも低く、高温の鋼板と接触した部分は高温に熱せ
られるが鋼板と接触しない部分は温度が低くなり、凸型
のクラウンが生じる。このような状態では鋼板にも温度
分布、張力分布がつきやすく、形状が悪化して耳波や絞
りなどが生じやすくなる。また、鋼板の幅が変わった場
合にはロールのプロフィールが変化し、鋼板形状が不安
定になりやすく、ロールのプロフィールが安定するまで
低速で操業しなければならないなどの問題があった。2. Description of the Related Art A hearth roll in a furnace used for annealing a metal, for example, continuous annealing of a cold-rolled steel sheet, has a high temperature in the furnace. Is low and the edge of the roll has a higher temperature, resulting in a temperature distribution. Depending on this temperature distribution, thermal expansion causes a concave crown in the center with high indentations and high edges in the profile. On the contrary, when it comes into contact with a steel plate whose temperature is higher than the ambient temperature of the furnace, or when it is used to cool a heated steel plate, the cooling roll, or the energizing roll or pressing roll used for energizing heating has a roll temperature higher than that of the steel plate. The temperature is low in the part that is in contact with the high temperature steel plate, but the temperature is low in the part that is not in contact with the steel plate, and a convex crown is generated. In such a state, the steel sheet is likely to have a temperature distribution and a tension distribution, and the shape of the steel sheet is deteriorated, so that an ear wave or a diaphragm is likely to occur. Further, when the width of the steel sheet changes, the profile of the roll changes, the shape of the steel sheet is likely to become unstable, and there is a problem that it is necessary to operate at a low speed until the profile of the roll becomes stable.
【０００３】また、通電ロールや押さえロールにクラウ
ンが生じると鋼板への接触圧力が部分的に低下する結
果、鋼板と通電ロールの間でスパークが発生し、鋼板、
通電ロール双方に溶融痕が生じ、製品品質の低下、ロー
ル寿命の低下をもたらすという問題があった。Further, when a crown is formed on the current-carrying roll or the pressing roll, the contact pressure on the steel plate is partially reduced, and as a result, sparks are generated between the steel plate and the current-carrying roll,
There is a problem in that melting marks are generated on both of the current-carrying rolls, resulting in deterioration of product quality and roll life.
【０００４】[0004]
【発明が解決しようとする課題】そこで、金属材との接
触や雰囲気温度によりロールに温度分布が生じるのを抑
制するとともに、仮に温度分布が生じた場合でも膨張し
ないようなロールとするため、ロール胴部の材質に着目
し、熱拡散しやすく熱膨張しない材質を検討すると、熱
伝導が良く熱膨張しにくいという両方の性質を持ち合わ
せる材質としてカーボンがある。カーボンの中でも押し
出し黒鉛は、結晶化がすすむほど熱伝導率が高くなると
いう性質がある。特に結晶は押し出し方向に配向するた
め、熱伝導はこの方向に特に高く、通常使用される鉄の
２〜３倍の熱伝導率を示す。したがって、押し出し方向
をロール胴長方向にとれば、熱は胴長方向に拡散しやす
くなり、高温の金属と接触しても温度分布はつきにく
い。一方、黒鉛は線膨張係数が小さく鉄の１／２〜１／
１０の伸びしかないので、仮に温度分布がついても熱膨
張量は小さく、プロフィールは変化しにくい。カーボン
材には、他にＣＩＰ成形したものや型込め成形したもの
にも同様の性質を有するものが多い。Therefore, in order to prevent the temperature distribution from being generated in the roll due to contact with a metal material or the ambient temperature, the roll is designed not to expand even if the temperature distribution is generated. Focusing on the material of the body, when considering a material that easily diffuses heat and does not expand, carbon is a material that has both the properties of good thermal conductivity and difficulty in thermal expansion. Among carbon, extruded graphite has a property that its thermal conductivity becomes higher as crystallization progresses. In particular, since the crystal is oriented in the extrusion direction, the heat conduction is particularly high in this direction, and the heat conductivity is 2 to 3 times that of iron that is usually used. Therefore, if the extrusion direction is the roll cylinder length direction, heat tends to diffuse in the cylinder length direction, and the temperature distribution is unlikely to occur even when contacting with high temperature metal. On the other hand, graphite has a small coefficient of linear expansion and is 1/2 to 1/1 / the size of iron.
Since there is only 10 elongations, even if a temperature distribution is attached, the amount of thermal expansion is small and the profile is unlikely to change. In addition to carbon materials, many carbon materials having similar properties are also used for CIP molding and molding.
【０００５】このようにカーボンはサーマルクラウン防
止には有効な特性を持つが、反面柔らかく、ロールとし
て使用する場合には耐摩耗性が問題となってくる。As described above, carbon has an effective property for preventing a thermal crown, but on the other hand, it is soft, and wear resistance becomes a problem when it is used as a roll.
【０００６】カーボンの耐摩耗性を向上させるために、
たとえば特開平４−２８０８６５号公報には、カーボン
中に金属繊維および／または金属粉を配合し、さらに金
属線および／または金網を配することが記載されてい
る。しかし、これは主に鉄道用パンタグラフ摺板に利用
することを考慮したものであり、カーボンロールの耐摩
耗性を向上させるには十分ではない。In order to improve the wear resistance of carbon,
For example, JP-A-4-280865 discloses that carbon is mixed with metal fibers and / or metal powders, and further metal wires and / or wire nets are arranged. However, this is mainly for use in a rail pantograph sliding plate, and is not sufficient for improving the wear resistance of the carbon roll.
【０００７】本発明は、ロール表面に不均一な温度分布
が生じにくく、サーマルクラウンの発生を防止でき、か
つ耐摩耗性も有するカーボンロールおよびその製造方法
を提供することを目的とする。An object of the present invention is to provide a carbon roll which is less likely to have a non-uniform temperature distribution on the roll surface, can prevent the generation of a thermal crown, and has abrasion resistance, and a method for producing the same.
【０００８】[0008]
【課題を解決するための手段】本発明は以下の〜の
通りである。Means for Solving the Problems The present invention is as follows.
【０００９】 ロール胴部表層に金属炭化物層を形成
したことを特徴とする耐摩耗性カーボンロール。A wear-resistant carbon roll having a metal carbide layer formed on the surface of the roll body.
【００１０】 炭素質のロール胴部表層を炭化物形成
金属またはその金属化合物で被覆し、熱処理してロール
胴部表層に金属炭化物層を形成することを特徴とする耐
摩耗性カーボンロールの製造方法。A method for producing a wear-resistant carbon roll, which comprises coating a carbonaceous roll body surface layer with a carbide-forming metal or a metal compound thereof and heat-treating it to form a metal carbide layer on the roll body surface layer.
【００１１】 前記被覆および熱処理を複数回行う前
記の耐摩耗性カーボンロールの製造方法。The method for producing an abrasion resistant carbon roll, wherein the coating and heat treatment are performed a plurality of times.
【００１２】 炭化物形成金属がＷ、Ｔｉ、Ｃｒ、Ｚ
ｒ、Ｍｏ、Ｓｉ、Ｔａ、Ｖ、Ｎｂのいずれかまたはこれ
らの組合せである前記またはの耐摩耗性カーボンロ
ールの製造方法。Carbide forming metals are W, Ti, Cr, Z
The method for producing the wear-resistant carbon roll as described above or any one of r, Mo, Si, Ta, V, and Nb, or a combination thereof.
【００１３】 前記被覆を溶射により行う前記〜
のいずれかの耐摩耗性カーボンロールの製造方法。The above-mentioned coating by thermal spraying
1. A method for manufacturing an abrasion resistant carbon roll according to any one of 1.
【００１４】 前記被覆をメッキにより行う前記〜
のいずれかの耐摩耗性カーボンロールの製造方法。The above-mentioned coating by plating
1. A method for manufacturing an abrasion resistant carbon roll according to any one of 1.
【００１５】 前記熱処理を窒素雰囲気中で行う前記
〜のいずれかの耐摩耗性カーボンロールの製造方
法。The method for producing an abrasion resistant carbon roll according to any one of 1 to 3 above, wherein the heat treatment is performed in a nitrogen atmosphere.
【００１６】[0016]
【作用】耐摩耗性を向上させるためには、柔らかいカー
ボンの表層に硬質層を形成するのが有効である。硬質層
としては、カーボンとなじみが良いこと、極めて高硬度
を有することから、金属炭化物層を形成することにし
た。In order to improve wear resistance, it is effective to form a hard layer on the surface layer of soft carbon. As the hard layer, a metal carbide layer was formed because it has good compatibility with carbon and has extremely high hardness.
【００１７】ところで、金属炭化物は高硬度の上融点が
高く、母材カーボンと膨張率も異なることから、金属炭
化物を成形したり溶射したりしてカーボンロールの表層
に金属炭化物層を連続的に形成するのは困難である。そ
こで本発明では、高温で炭素と反応して金属炭化物を形
成する金属、たとえばＷ、Ｔｉ、Ｃｒ、Ｚｒ、Ｍｏ、Ｓ
ｉ、Ｔａ、Ｖ、Ｎｂのいずれか、またはこれらを複数組
み合わせてカーボンロールの胴部表層を被覆し、その後
ロールを高温で熱処理することにより前記金属をロール
のカーボンで炭化させて金属炭化物層を連続的に形成す
ることにした。By the way, since the metal carbide has a high hardness and a high melting point and has a different expansion coefficient from the base material carbon, the metal carbide is formed or sprayed to continuously form the metal carbide layer on the surface layer of the carbon roll. Difficult to form. Therefore, in the present invention, a metal such as W, Ti, Cr, Zr, Mo, S that reacts with carbon to form a metal carbide at a high temperature.
i, Ta, V, or Nb, or a combination thereof, to cover the body surface layer of the carbon roll, and then heat the roll at a high temperature to carbonize the metal with the carbon of the roll to form a metal carbide layer. I decided to form it continuously.
【００１８】この方法によれば、炭化反応が始まる８０
０℃程度から金属の融点以下の温度で熱処理することに
より、容易に硬質の炭化物層をロール胴部表層に形成す
ることができる。熱処理温度と時間は、炭化物を焼成す
る場合に比べれば低温、短時間で足りる。そして、金属
炭化物層はロール表面に被覆した金属とロール胴部を構
成するカーボンとの反応で形成されるため、金属炭化物
層と母材カーボンとの連続性が良く、熱膨張等により金
属炭化物層が剥離する危険も少ない。According to this method, the carbonization reaction starts 80
By performing the heat treatment at a temperature of about 0 ° C. to the melting point of the metal or less, a hard carbide layer can be easily formed on the surface layer of the roll body. The heat treatment temperature and time are lower and shorter than those in the case of firing the carbide. Since the metal carbide layer is formed by the reaction between the metal coated on the roll surface and the carbon constituting the roll body, the metal carbide layer and the base material carbon have good continuity, and the metal carbide layer due to thermal expansion or the like. There is little risk of peeling.
【００１９】なお、前述のように炭化物を形成する金属
の他、当該金属の酸化物のような金属化合物を被覆して
も良い。この場合も、熱処理により金属と化合している
酸素等の元素が離脱し、残った金属が炭化して炭化物が
形成されるからである。In addition to the metal forming the carbide as described above, a metal compound such as an oxide of the metal may be coated. Also in this case, an element such as oxygen combined with the metal is released by the heat treatment, and the remaining metal is carbonized to form a carbide.
【００２０】熱処理は、金属の酸化を避けるためアルゴ
ン雰囲気、窒素雰囲気等の非酸化性雰囲気中で行う。こ
の際、窒素雰囲気とすれば、金属と雰囲気中の窒素とが
反応して金属窒化物も形成される可能性があり、金属窒
化物も金属炭化物と同様に硬度が非常に高い。The heat treatment is carried out in a non-oxidizing atmosphere such as an argon atmosphere or a nitrogen atmosphere in order to avoid oxidation of the metal. At this time, if a nitrogen atmosphere is used, the metal and nitrogen in the atmosphere may react with each other to form a metal nitride, and the metal nitride has a very high hardness like the metal carbide.
【００２１】以上のようにして製造したカーボンロール
は、ロール胴部表層に非常に硬度の高い金属炭化物が母
材カーボンとの密着性良く連続的に形成されている。そ
のため、膨張差起因による割れや剥離等が起こりにく
い。また、カーボン中に金属繊維等を混入させた場合よ
りも耐摩耗性が向上し、カーボンロールの欠点、すなわ
ち柔らかいため耐摩耗性が劣る問題点が解決される。そ
して、ロールの温度分布に起因するサーマルクラウンの
発生という問題は、熱伝導が良く熱膨張しにくいという
母材カーボンの特性により解決することができる。この
ようにして、本発明によりサーマルクラウンが発生せ
ず、かつ耐摩耗性が優れるカーボンロールが得られる。In the carbon roll manufactured as described above, a metal carbide having a very high hardness is continuously formed on the surface of the roll body with good adhesion to the base material carbon. Therefore, cracking or peeling due to the difference in expansion hardly occurs. Further, the wear resistance is improved as compared with the case where metal fibers or the like are mixed in carbon, and the drawback of the carbon roll, that is, the problem of poor wear resistance due to softness is solved. The problem of thermal crown generation due to the temperature distribution of the roll can be solved by the characteristics of the base material carbon, which has good thermal conductivity and is less likely to thermally expand. In this way, according to the present invention, a carbon roll which does not generate a thermal crown and has excellent wear resistance can be obtained.
【００２２】[0022]
【実施例１】カーボンテストピース（５０×５０×１０
ｍｍ）上にＷ５０μｍを溶射し、アルゴン雰囲気中で２
６００℃×１２時間の熱処理を施してＷＣ層を形成し
た。テストピース表面は、Ｗがカーボン中へ拡散、浸透
したため荒れており、研摩して表面を整えた。Example 1 Carbon test piece (50 × 50 × 10
mm), and spray 50 Wm onto the
Heat treatment was performed at 600 ° C. for 12 hours to form a WC layer. The surface of the test piece was rough because W was diffused and permeated into the carbon, and the surface was ground and polished.
【００２３】このようにして得られたカーボンテストピ
ースについて、ピンをロール表面に接触させてロールの
摩耗量を調べるピンオンディスク試験を１ｋｇｆ／ｍｍ
2 、２時間行ったところ、表１に示すように摩耗量は＋
２．５ｍｇとなり、ピンを削り取ってしまうほど耐摩耗
性に優れていた。The carbon test piece thus obtained was subjected to a pin-on-disk test for examining the amount of roll wear by bringing the pin into contact with the roll surface at 1 kgf / mm.
2 After 2 hours, the amount of wear was + as shown in Table 1.
The amount was 2.5 mg, and the abrasion resistance was excellent enough to scrape off the pin.
【００２４】[0024]
【表１】 注：−はロールがピンにより削られたことを示し、＋は
逆にロールがピンを削ったことを示す。[Table 1] Note: -indicates that the roll scrapes the pin, and + indicates that the roll scrapes the pin.
【００２５】[0025]
【実施例２】ロール胴部を構成するφ２３０ｍｍ×長さ
３００ｍｍのカーボンスリーブ上にＷを５０μｍ溶射し
た。その後、アルゴン雰囲気中で２６００℃×１２時間
の熱処理を施してＷをロール母材のカーボンと反応さ
せ、ＷＣを形成した。その結果、表層から約３００μｍ
厚のＷＣ層が形成され、ロール胴部表面外観はＷが母材
カーボン中へ浸透したため溶射層に微小な凹凸が散見さ
れた。このロールを研摩し、外形寸法を整えた後、径２
３０ｍｍ、幅１００ｍｍの鉄ロール（Ｓ４５Ｃ）と３ｋ
ｇ／ｍｍの圧下力で約１０００ｋｍ接触させ、摩耗深さ
を測定したところ、２μｍしかなかった。同様の試験を
未処理のカーボンロールで行った場合には、約２５０μ
ｍであった。Example 2 W was sprayed in an amount of 50 μm on a carbon sleeve having a diameter of 230 mm and a length of 300 mm which constitutes the roll body. Then, heat treatment was performed at 2600 ° C. for 12 hours in an argon atmosphere to react W with carbon of the roll base material to form WC. As a result, about 300 μm from the surface
A thick WC layer was formed, and the appearance of the surface of the roll barrel portion was such that minute unevenness was observed in the sprayed layer because W had penetrated into the base material carbon. After polishing this roll and adjusting the external dimensions, the diameter is 2
30mm, 100mm width iron roll (S45C) and 3k
When the wear depth was measured by contacting with a pressing force of g / mm for about 1000 km, the wear depth was only 2 μm. When the same test is performed on an untreated carbon roll, about 250μ
It was m.
【００２６】また、耐熱衝撃性を調べるため、Ｎ2 雰囲
気中で６００℃に加熱した後油中に投下してロール表面
が剥離を開始するまでの投下回数を測定したところ、表
２に示すように５０回と圧倒的に耐熱衝撃性に優れてい
ることが分かった。Further, in order to examine the thermal shock resistance, the number of drops until the roll surface starts peeling after being heated in an N 2 atmosphere at 600 ° C. and dropped in oil was measured. It was found that the thermal shock resistance was overwhelmingly high at 50 times.
【００２７】[0027]
【表２】 [Table 2]
【００２８】[0028]
【実施例３】実施例２と同じカーボンスリーブ上にＣｒ
を５０μｍメッキした後、アルゴン雰囲気中で１４００
℃×１２時間の熱処理を施して表層より約２００μｍの
炭化クロム層を形成した。ロール胴部表面外観は、Ｃｒ
が母材カーボン中へ浸透したためメッキ層に微小な凹凸
が散見された。[Third Embodiment] Cr on the same carbon sleeve as in the second embodiment.
After plating with 50 μm, 1400 in argon atmosphere
A heat treatment was conducted at a temperature of 12 hours for 12 hours to form a chromium carbide layer having a thickness of about 200 μm from the surface layer. The surface appearance of the roll body is Cr
As a result of the infiltration into the base material carbon, minute irregularities were found in the plating layer.
【００２９】このようにして得られたカーボンロールに
ついて実施例１と同様にピンオンディスク試験および耐
熱衝撃性試験を行い、その結果を表１、表２に併せて示
した。比較例に対し、耐摩耗性、耐熱衝撃性のいずれも
優れていることが分かる。The carbon roll thus obtained was subjected to a pin-on-disk test and a thermal shock resistance test in the same manner as in Example 1, and the results are also shown in Tables 1 and 2. It can be seen that both the wear resistance and the thermal shock resistance are superior to the comparative example.
【００３０】[0030]
【実施例４】実施例２と同様のＷ溶射、熱処理後、さら
に同様のＷ溶射、熱処理を繰り返し実施した。その結
果、ＷＣ層の厚みは処理１回で表層より約３００μｍで
あったのが、処理２回で約５００μｍ、処理３回で６０
０μｍとなり、必要に応じて処理を繰り返せば所望の厚
みの金属炭化物層が得られることが分かった。Example 4 After the same W thermal spraying and heat treatment as in Example 2, the same W thermal spraying and heat treatment were repeated. As a result, the thickness of the WC layer was about 300 μm from the surface layer in one treatment, but was about 500 μm in the two treatments and 60 in the three treatments.
It became 0 μm, and it was found that a metal carbide layer having a desired thickness can be obtained by repeating the treatment as necessary.
【００３１】[0031]
【発明の効果】本発明の耐摩耗性カーボンロールは硬質
の金属炭化物層を表層に有するのでカーボンの欠点であ
った摩耗の問題が解決され、耐熱衝撃性も非常に優れて
いるので長時間安定して使用が可能である。また、母材
がカーボンであるため被加熱材や雰囲気と接触しても温
度分布が生じにくく、かつ熱膨張率も小さいのでサーマ
ルクラウンの発生を抑制できる。The wear-resistant carbon roll of the present invention has a hard metal carbide layer on its surface, so that the problem of wear, which was a drawback of carbon, is solved, and its thermal shock resistance is also very excellent, so it is stable for a long time. Can be used. Further, since the base material is carbon, the temperature distribution is unlikely to occur even when it comes into contact with the material to be heated or the atmosphere, and the coefficient of thermal expansion is small, so that the generation of thermal crown can be suppressed.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２３Ｃ 24/00 // Ｃ０４Ｂ 35/52 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location C23C 24/00 // C04B 35/52
Claims (7)
たことを特徴とする耐摩耗性カーボンロール。1. A wear-resistant carbon roll characterized in that a metal carbide layer is formed on the surface layer of the roll body.
属またはその金属化合物で被覆し、熱処理してロール胴
部表層に金属炭化物層を形成することを特徴とする耐摩
耗性カーボンロールの製造方法。2. A method for producing a wear-resistant carbon roll, characterized in that a surface layer of a carbonaceous roll body is coated with a carbide-forming metal or a metal compound thereof and heat-treated to form a metal carbide layer on the surface layer of the roll body. Method.
項２記載の耐摩耗性カーボンロールの製造方法。3. The method for producing an abrasion resistant carbon roll according to claim 2, wherein the coating and the heat treatment are performed a plurality of times.
Ｚｒ、Ｍｏ、Ｓｉ、Ｔａ、Ｖ、Ｎｂのいずれかまたはこ
れらの組合せである請求項２または３記載の耐摩耗性カ
ーボンロールの製造方法。4. The carbide forming metal is W, Ti, Cr,
The method for producing an abrasion-resistant carbon roll according to claim 2 or 3, which is one of Zr, Mo, Si, Ta, V, and Nb or a combination thereof.
のいずれか記載の耐摩耗性カーボンロールの製造方法。5. The method according to claim 2, wherein the coating is performed by thermal spraying.
5. A method for producing an abrasion resistant carbon roll according to any one of 1.
４のいずれか記載の耐摩耗性カーボンロールの製造方
法。6. The method according to claim 2, wherein the coating is performed by plating.
4. The method for producing an abrasion resistant carbon roll according to any one of 4 above.
２〜６のいずれか記載の耐摩耗性カーボンロールの製造
方法。7. The method for producing an abrasion-resistant carbon roll according to claim 2, wherein the heat treatment is performed in a nitrogen atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6093875A JPH07277862A (en) | 1994-04-08 | 1994-04-08 | Abrasion resistant carbon roll and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6093875A JPH07277862A (en) | 1994-04-08 | 1994-04-08 | Abrasion resistant carbon roll and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07277862A true JPH07277862A (en) | 1995-10-24 |
Family
ID=14094649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6093875A Pending JPH07277862A (en) | 1994-04-08 | 1994-04-08 | Abrasion resistant carbon roll and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07277862A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006151710A (en) * | 2004-11-26 | 2006-06-15 | Hitachi Tool Engineering Ltd | Heat resistant coated member |
| JP4545872B2 (en) * | 2000-03-29 | 2010-09-15 | 日本カーボン株式会社 | Method for producing molybdenum-coated carbon fiber reinforced carbon material |
-
1994
- 1994-04-08 JP JP6093875A patent/JPH07277862A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4545872B2 (en) * | 2000-03-29 | 2010-09-15 | 日本カーボン株式会社 | Method for producing molybdenum-coated carbon fiber reinforced carbon material |
| JP2006151710A (en) * | 2004-11-26 | 2006-06-15 | Hitachi Tool Engineering Ltd | Heat resistant coated member |
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