JPH06116703A - Hearth roller having heat resistance and wear resistance - Google Patents
Hearth roller having heat resistance and wear resistanceInfo
- Publication number
- JPH06116703A JPH06116703A JP28495092A JP28495092A JPH06116703A JP H06116703 A JPH06116703 A JP H06116703A JP 28495092 A JP28495092 A JP 28495092A JP 28495092 A JP28495092 A JP 28495092A JP H06116703 A JPH06116703 A JP H06116703A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- carbide
- chromium
- heat
- resistant
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、薄鋼板等の連続熱処理
炉等において、被処理物炉内搬送使用に適した、表面に
サーメット材料溶射層を有する耐熱耐摩耗性ハースロー
ルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant and abrasion-resistant hearth roll having a cermet sprayed layer on the surface, which is suitable for use in a continuous heat treatment furnace for a thin steel sheet or the like and is suitable for conveying the object to be treated in the furnace.
【０００２】[0002]
【従来の技術】従来、たとえば特開昭５８−１４１３３
８号公報や特開昭６２−１３６４２１号公報などにみら
れるように、連続熱処理炉に使用されていたハースロー
ルには、クロム炭化物と、ニッケル・クロム合金の混合
材料とか、焼結材料が溶射用に用いられていた。2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No. 58-14133.
As disclosed in Japanese Patent Laid-Open No. 8 and Japanese Patent Application Laid-Open No. 62-136421, the hearth roll used in the continuous heat treatment furnace is sprayed with a mixed material of chromium carbide and nickel-chromium alloy or a sintered material. Was used for.
【０００３】[0003]
【発明が解決しようとする課題】しかし、これら公知の
溶射粉末は、表面にクロム炭化物の半分以上が露出して
おり、溶射皮膜の特性としては必ずしも良好とはいえ
ず、したがってこれを溶射したロールは耐熱耐摩耗性が
十分であるとはいえなかった。However, in these known thermal spray powders, more than half of the chromium carbide is exposed on the surface, and it cannot be said that the characteristics of the thermal spray coating are always good. The heat resistance and abrasion resistance were not sufficient.
【０００４】通常、溶射粉末の表面にクロム炭化物が露
出していると、溶射中に大気の影響を受けやすく、溶射
皮膜中に酸化物が混入して気孔率の上昇、皮膜硬度の低
下をきたすことが判明した本発明は、前記従来の問題点
を解消し、クロム炭化物の表面を結合金属であるニッケ
ル・クロム合金等で被覆することにより、溶射中におけ
る大気の影響をなくし、かつ溶射皮膜中のクロム炭化物
間に結合金属がネットワーク状に存在する緻密で高硬度
の皮膜を得ることのできる溶射材料により形成した、表
面にサーメット材料溶射層を有する耐熱耐摩耗性ハース
ロールを提供することを目的としている。Normally, when chromium carbide is exposed on the surface of the sprayed powder, it is easily affected by the atmosphere during spraying, and oxides are mixed in the sprayed coating to increase porosity and decrease coating hardness. It has been found that the present invention solves the above-mentioned conventional problems and eliminates the influence of the atmosphere during thermal spraying by coating the surface of the chromium carbide with a binding metal such as nickel-chromium alloy, and in the thermal spray coating. To provide a heat-resistant, abrasion-resistant hearth roll having a cermet material sprayed layer on the surface, which is formed by a sprayed material capable of obtaining a dense and high-hardness coating in which a bonding metal exists in the form of a network between chromium carbides of I am trying.
【０００５】[0005]
【課題を解決するための手段】上記目的を解決するた
め、本発明者等は鋭意研究を重ねた結果、サーメット溶
射皮膜を形成する溶射粒子が、溶射中における大気との
接触を防ぐことにより、溶射層の緻密性、硬度の向上、
脆弱性低下と耐熱耐摩耗性を高められることを知見し
て、本発明を完成するに至った。In order to solve the above-mentioned object, the inventors of the present invention have conducted extensive studies, and as a result, spray particles forming a cermet sprayed coating prevent contact with the atmosphere during spraying, Improvement of the denseness and hardness of the sprayed layer,
The inventors have completed the present invention by finding that the brittleness can be reduced and the heat and abrasion resistance can be enhanced.
【０００６】すなわち本発明は、重量％で、クロム炭化
物５０〜９０％、残部不可避不純物およびニッケル・ク
ロム合金よりなり、炭化物粒子の少なくとも７０％が前
記合金により被包された粒子構造で、平均粒径５〜１０
０μｍのサーメット材料よりなる溶射層を有することを
特徴とする耐熱耐摩耗性ハースロールを要旨としてお
り、前記クロム炭化物の３０％までをニオブ炭化物、チ
タン炭化物の一種以上で置換した溶射層を有することを
特徴とする耐熱耐摩耗性ハースロールもその要旨であ
る。That is, the present invention has a particle structure in which, by weight, 50 to 90% of chromium carbides, the balance of unavoidable impurities and nickel-chromium alloy, at least 70% of the carbide particles are encapsulated by said alloy, the average particle size is Diameter 5-10
A heat resistant and abrasion resistant hearth roll having a sprayed layer made of a cermet material having a thickness of 0 μm is a gist, and has a sprayed layer in which up to 30% of the chromium carbide is replaced with one or more of niobium carbide and titanium carbide. A heat resistant and abrasion resistant hearth roll, which is characterized by
【０００７】そして、クロム炭化物またはその一部がニ
オブ炭化物、チタン炭化物の一種以上で置換されたもの
および、ニッケル・クロム合金にかえ、ニッケル、コバ
ルトの一種または二種と、クロム、アルミニウムの一種
または二種を含むニッケル・クロムのみの合金以外の合
金、またはニッケルおよびコバルトの一種または二種を
含むＭクラリー合金（ＭＣｒＡｌＹ合金）のうち、いず
れか一種の合金と不可避不純物よりなるサーメット材料
粉末によって形成された溶射層を持つことを特徴とする
耐熱耐摩耗性ハースロールもその要旨としている。さら
にサーメット溶射層の下地材として、耐熱性金属、合金
溶射層を設けた耐熱耐摩耗性ハースロールもその要旨で
ある。Chromium carbide or a part thereof is replaced with one or more of niobium carbide and titanium carbide, and nickel-chromium alloy is replaced with one or two of nickel and cobalt and one of chromium and aluminum or Formed by a cermet material powder consisting of an alloy other than an alloy containing only nickel and chromium containing two kinds, or an M clary alloy (MCrAlY alloy) containing one or two kinds of nickel and cobalt and an unavoidable impurity. A heat and abrasion resistant hearth roll, which is characterized by having a sprayed layer formed thereon, is also included in the gist. Further, a heat resistant and abrasion resistant hearth roll provided with a heat resistant metal or alloy sprayed layer as a base material for the cermet sprayed layer is also a gist thereof.
【０００８】[0008]
【作用】本発明の構成と作用を説明する。本発明のねら
いは溶射用粉末製造工程において、溶融した炭化物を粉
砕することにより、ポアの無い密な一次粒子をベースと
し、これに電解めっき、無電解めっき、ＣＶＤ、ＰＶＤ
等あるいは機械的（物理的）被覆により金属皮膜を形成
するところにある。そして溶射時の雰囲気ガスの影響を
少なくし、かつ溶射皮膜中のクロム炭化物間に結合金属
がネットワーク状に存在する緻密で高硬度の皮膜をうる
ことのできる溶射粉末とする点にある。The structure and operation of the present invention will be described. The aim of the present invention is to pulverize the molten carbide in the process for producing the powder for thermal spraying to make dense primary particles free of pores, which are then electroplated, electroless plated, CVD, PVD.
Etc., or forming a metal film by mechanical (physical) coating. The effect of atmospheric gas at the time of thermal spraying is to be reduced, and a dense and high-hardness coating having a bond metal in the form of a network between the chromium carbides in the thermal spray coating can be obtained.
【０００９】被覆の方法としては、あらかじめクロム炭
化物の表面に金属クロムをＰＶＤ、ＣＶＤ等で部分めっ
きした粉末を、充分に分散出来る程度の回転数を有する
攪拌槽にいれ、無電解めっきによりＮｉ被覆をする。そ
の後熱処理により固相拡散をおこなわせＮｉ−Ｃｒ合金
皮膜を得る。当然Ｎｉ−Ｃｒ合金めっきは上記方法に限
定されるものではない。又、他の合金も同様にめっきす
ることができる。As a coating method, a powder obtained by partially plating metallic chromium on the surface of chromium carbide by PVD, CVD or the like in advance is placed in a stirring tank having a rotation speed sufficient to disperse it, and Ni coating is performed by electroless plating. do. After that, solid phase diffusion is performed by heat treatment to obtain a Ni-Cr alloy film. Of course, the Ni-Cr alloy plating is not limited to the above method. Also, other alloys can be plated as well.
【０００９】機械的コーティング法では、炭化物粉末よ
りさらに細かい合金粉末と有機バインダーを用意し、こ
れらを所定割合に配合し、減圧又は不活性ガス雰囲気下
で十分に攪拌し、炭化物表面に合金を結合させる。その
後熱処理によりバインダーを除去し、炭化物表面に合金
を結合させる。この外にも適当な方法があれば被覆の方
法は何でもよく、緻密な被覆を炭化物粉末表面に行うよ
うにする。In the mechanical coating method, an alloy powder finer than the carbide powder and an organic binder are prepared, mixed at a predetermined ratio, and sufficiently stirred under a reduced pressure or an inert gas atmosphere to bond the alloy to the surface of the carbide. Let After that, the binder is removed by heat treatment to bond the alloy to the surface of the carbide. Any other suitable coating method may be used, and a dense coating is applied to the surface of the carbide powder.
【００１０】図１は本発明に使用する溶射粉末の断面を
模式的に示したもので、（Ａ）はＰＶＤ→無電解めっき
熱処理粉末の被覆の状態、（Ｂ）は機械的コーティング
粉末の被覆の状態を示す。このように緻密な合金膜で粉
末表面を被覆することにより、クロム炭化物に対する溶
射中の大気の影響をいちじるしく少なくし、溶射皮膜特
性を向上することが出来るのである。FIG. 1 schematically shows a cross section of the thermal spraying powder used in the present invention. (A) shows a PVD → electroless plating heat treatment powder coating state, and (B) shows a mechanical coating powder coating. Indicates the state of. By coating the powder surface with such a dense alloy film, it is possible to significantly reduce the influence of the atmosphere during the thermal spraying on the chromium carbide and improve the sprayed coating characteristics.
【００１１】次に、本発明で使用する溶射粉末の各成分
組成割合限定理由、ならびにその作用効果を説明する。 クロム炭化物（ＣｒXＣYで代表して表示）：耐熱、耐摩
耗性皮膜としての主成分で、含有量が５０％未満の場合
は耐熱性の低下をきたし、また９０％を超過する場合に
は、皮膜の密着性が低下する。よってクロム炭化物は重
量％で５０〜９０％とした。Next, the reason for limiting the composition ratio of each component of the thermal spraying powder used in the present invention, and its function and effect will be explained. Chromium carbide (represented by Cr X C Y ): A main component as a heat and abrasion resistant film. When the content is less than 50%, the heat resistance decreases, and when it exceeds 90%. Reduces the adhesion of the coating. Therefore, the chromium carbide is 50 to 90% by weight.
【００１２】その他の炭化物：クロム炭化物に代替し得
るものとして、ニオブ炭化物（ＮｂＣで表示）、チタン
炭化物（ＴｉＣで表示）があり、これらを３０％までの
範囲内で置換しても、クロム炭化物のみの場合と同様の
効果を奏し得ることを確認した。Other carbides: As alternatives to chromium carbides, there are niobium carbides (indicated by NbC) and titanium carbides (indicated by TiC). Even if these are replaced within the range of up to 30%, chromium carbides It was confirmed that the same effect as in the case of only can be obtained.
【００１３】Ｎｉ、Ｃｏ：高延性で、炭化物の良結合性
合金としてニッケル、コバルト合金等が選定される。Ｎ
ｉ、Ｃｏは合金の主成分であるが、多量にすぎると、ハ
ースロールに溶射し実用した場合のビルドアップ性を大
きくし、少量では結合効果が少ない。よって実施例に示
すごとき適量を添加する。Ni, Co: Nickel, cobalt alloy or the like is selected as an alloy having high ductility and good binding property of carbide. N
Although i and Co are the main components of the alloy, an excessive amount increases the build-up property when sprayed on a hearth roll and put into practical use, and a small amount has little bonding effect. Therefore, an appropriate amount is added as shown in the examples.
【００１４】Ｃｒ、Ａｌ：合金に耐熱性を与えるため添
加する成分である。しかし多量に添加すると、合金と炭
化物の結合力を低下する。よって実施例に示すごとき適
量を添加する。Cr, Al: Components added to impart heat resistance to the alloy. However, if added in a large amount, the bond strength between the alloy and the carbide is reduced. Therefore, an appropriate amount is added as shown in the examples.
【００１５】Ｍクラリー合金：耐熱性、耐ビルドアップ
性を与える代表的合金である。よって、Ｎｉ−Ｃｏ−Ｃ
ｒ−Ａｌ合金の一種として、ＭＣｒＡｌＹ合金を使うこ
とが出来る。しかし高価であり、実施例のようにＣｒX
ＣYの結合剤として適量使用することが出来る。M-Clarry alloy: A typical alloy that provides heat resistance and build-up resistance. Therefore, Ni-Co-C
MCrAlY alloy can be used as a kind of r-Al alloy. However, it is expensive and as in the example, Cr X
It can be used in an appropriate amount as a binder for C Y.
【００１６】施工法：この溶射粉末の溶射施工法として
は高速ガス溶射法、プラズマ溶射法等が適用できる。そ
の他でもサーメット溶射層形成が可能な溶射法は適用可
能である。又サーメット溶射の特徴として、下地材とし
て耐熱性の金属、合金溶射を行う方法も当然採用され
る。Construction method: A high-speed gas spraying method, a plasma spraying method or the like can be applied as a spraying method for the sprayed powder. In addition, a thermal spraying method capable of forming a cermet thermal sprayed layer can be applied. As a feature of cermet thermal spraying, a method of thermally spraying a heat-resistant metal or alloy as a base material is naturally adopted.
【００１７】[0017]
【実施例】本発明を実施例により具体的に説明するが、
これによって本発明が限定されることはない。本発明
を、表１に示した実施例により説明する。EXAMPLES The present invention will be specifically described with reference to Examples.
This does not limit the invention. The invention is illustrated by the examples shown in Table 1.
【００１８】[0018]
【表１】 [Table 1]
【００１９】表１で、Ｎｏ．１、２、Ｎｏ．５、６、Ｎ
ｏ．９が本発明の実施例であり、無電解めっき、あるい
は機械的合金コーティング溶射粉末を使用する。これら
は溶射皮膜の気孔率が小さく、緻密な組織形成を示すこ
とが分かる。又皮膜硬度も、気孔率生成の少ない溶射粉
末を使ったものが高い。In Table 1, No. 1, 2, No. 5, 6, N
o. Example 9 of the present invention uses electroless plating or mechanical alloy coating sprayed powder. It can be seen that these have a small porosity of the sprayed coating and show a dense structure formation. The coating hardness is also high when using a thermal spraying powder that produces less porosity.
【００２０】よってハースロール用等耐熱、耐摩耗用溶
射材料として本発明で使用する被覆用溶射粉末は非常に
効果があり、これを表面に溶射した本発明ハースロール
は、実用上工業的価値が大きいものである。Therefore, the thermal spraying powder for coating used in the present invention as a thermal spraying material for heat and abrasion resistance for hearth rolls is very effective, and the hearth roll of the present invention having this surface sprayed has a practical industrial value. It's a big one.
【００２１】[0021]
【発明の効果】本発明は、以上説明したように構成され
ているから、実用性にすぐれ、連続熱処理炉等におい
て、被処理物炉内搬送使用に適した、耐熱耐摩耗性ハー
スロールを提供することができ、工業的価値がきわめて
大きく、産業上益するところ大である。EFFECTS OF THE INVENTION Since the present invention is configured as described above, it provides a heat-resistant, abrasion-resistant hearth roll which is excellent in practicality and suitable for carrying and using an object to be treated in a continuous heat treatment furnace or the like. It can be done, has an extremely high industrial value, and has great industrial benefits.
【図１】 本発明耐熱耐摩耗性ハースロールの溶射層形
成用溶射粉末粒の性状を示す拡大説明図である。 （Ａ） ＰＶＤ→無電解めっき熱処理粉末。 （Ｂ） 機械的コーティング粉末。FIG. 1 is an enlarged explanatory view showing properties of thermal spray powder particles for forming a thermal spray layer of a heat resistant and abrasion resistant hearth roll of the present invention. (A) PVD → electroless plating heat treatment powder. (B) Mechanical coating powder.
１ １次粒子のＣｒXＣY粉末。 ２ ＰＶＤ→無電解めっき熱処理皮膜。 ３ 機械的コーティング皮膜。1 Cr X C Y powder of primary particles. 2 PVD → electroless plating heat treatment film. 3 Mechanical coating film.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 津田 拓也 福岡県北九州市戸畑区大字中原46 新日本 製鉄株式会社八幡製鉄所戸畑構内日鉄ハー ド株式会社戸畑事業所内 (72)発明者 芦田 清実 東京都台東区上野桜木２−５−１ パウレ ックス株式会社内 (72)発明者 安岡 淳一 東京都台東区上野桜木２−５−１ パウレ ックス株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Takuya Tsuda Inventor Takuya Tsuda 46 Nakahara, Tobata-ku, Kitakyushu, Fukuoka 46 Nippon Steel Co., Ltd. Yawata Works Tobata Campus Nittetsu Hard Co., Ltd. Tobata Works (72) Inventor Kiyomi Ashida Tokyo 2-5-1 Ueno Sakuragi, Taito-ku, Tokyo (72) Inventor Junichi Yasuoka 2-5-1 Ueno Sakuragi, Taito-ku, Tokyo Paulex Co., Ltd.
Claims (5)
残部不可避不純物およびニッケル・クロム合金よりな
り、炭化物粒子の少なくとも７０％が前記合金により被
包された粒子構造で、平均粒径５〜１００μｍのサーメ
ット材料よりなる溶射層を有することを特徴とする耐熱
耐摩耗性ハースロール。1. Chromium carbide 50-90% by weight,
A heat resistance characterized by having a thermal sprayed layer made of a cermet material having an average particle size of 5 to 100 μm, having a particle structure in which the balance is unavoidable impurities and a nickel-chromium alloy, and at least 70% of carbide particles are encapsulated by the alloy. Abrasion resistant hearth roll.
ニオブ炭化物、チタン炭化物の一種以上で置換した請求
項１記載の耐熱耐摩耗性ハースロール。2. A heat and abrasion resistant hearth roll according to claim 1, wherein up to 30% by weight of chromium carbide is replaced by one or more of niobium carbide and titanium carbide.
ル、コバルトの一種または二種と、クロム、アルミニウ
ムの一種または二種を含むニッケル・クロムのみの合金
以外の合金、またはニッケルおよびコバルトの一種また
は二種を含むＭクラリー合金（ＭＣｒＡｌＹ合金）のう
ち、いずれか一種の合金と不可避不純物よりなるサーメ
ット材料粉末である請求項１または２記載の耐熱耐摩耗
性ハースロール。3. An alloy other than a nickel-chromium alloy containing one or two of nickel and cobalt and one or two of chromium and aluminum instead of a nickel-chromium alloy, or one or two of nickel and cobalt. The heat-resistant, abrasion-resistant hearth roll according to claim 1 or 2, which is a cermet material powder composed of one kind of alloy and inevitable impurities among M-clary alloys containing seeds (MCrAlY alloy).
金属、合金溶射層を設けた請求項１、２または３記載の
耐熱耐摩耗性ハースロール。4. The heat-resistant, abrasion-resistant hearth roll according to claim 1, wherein a heat-resistant metal or alloy spray layer is provided as a base material for the cermet spray layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28495092A JPH06116703A (en) | 1992-10-01 | 1992-10-01 | Hearth roller having heat resistance and wear resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28495092A JPH06116703A (en) | 1992-10-01 | 1992-10-01 | Hearth roller having heat resistance and wear resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06116703A true JPH06116703A (en) | 1994-04-26 |
Family
ID=17685175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28495092A Withdrawn JPH06116703A (en) | 1992-10-01 | 1992-10-01 | Hearth roller having heat resistance and wear resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06116703A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100259481B1 (en) * | 1994-06-24 | 2000-06-15 | 로버트 에이. 바쎄트 | Process for carbide particles dispersed in a mcraly-based coating |
| KR100347606B1 (en) * | 1998-12-14 | 2002-09-18 | 주식회사 포스코 | High temperature hardness hearth roll coating method using ultra-fast flame spraying |
| JP2006183091A (en) * | 2004-12-27 | 2006-07-13 | Fujimi Inc | Powder to be thermal-sprayed |
| JP2008240072A (en) * | 2007-03-27 | 2008-10-09 | Tocalo Co Ltd | Thermal spraying powder, sprayed coating, and hearth roll |
| WO2009069829A1 (en) | 2007-11-28 | 2009-06-04 | Nippon Steel Corporation | Hearth roll for continuous annealing furnace and process for production of the same |
| JP2016156046A (en) * | 2015-02-24 | 2016-09-01 | 株式会社フジミインコーポレーテッド | Powder for spray coating |
-
1992
- 1992-10-01 JP JP28495092A patent/JPH06116703A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100259481B1 (en) * | 1994-06-24 | 2000-06-15 | 로버트 에이. 바쎄트 | Process for carbide particles dispersed in a mcraly-based coating |
| KR100347606B1 (en) * | 1998-12-14 | 2002-09-18 | 주식회사 포스코 | High temperature hardness hearth roll coating method using ultra-fast flame spraying |
| JP2006183091A (en) * | 2004-12-27 | 2006-07-13 | Fujimi Inc | Powder to be thermal-sprayed |
| JP4547253B2 (en) * | 2004-12-27 | 2010-09-22 | 株式会社フジミインコーポレーテッド | Thermal spray powder |
| JP2008240072A (en) * | 2007-03-27 | 2008-10-09 | Tocalo Co Ltd | Thermal spraying powder, sprayed coating, and hearth roll |
| WO2009069829A1 (en) | 2007-11-28 | 2009-06-04 | Nippon Steel Corporation | Hearth roll for continuous annealing furnace and process for production of the same |
| US8864869B2 (en) | 2007-11-28 | 2014-10-21 | Nippon Steel & Sumitomo Metal Corporation | Hearth roll in a continuous annealing furnace and its production method |
| JP2016156046A (en) * | 2015-02-24 | 2016-09-01 | 株式会社フジミインコーポレーテッド | Powder for spray coating |
| KR20160103523A (en) * | 2015-02-24 | 2016-09-01 | 가부시키가이샤 후지미인코퍼레이티드 | Powder for thermal spraying |
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Legal Events
| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
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