JPH06220524A - Roll for carrying high-temperature steel material - Google Patents

Roll for carrying high-temperature steel material

Info

Publication number
JPH06220524A
JPH06220524A JP5010909A JP1090993A JPH06220524A JP H06220524 A JPH06220524 A JP H06220524A JP 5010909 A JP5010909 A JP 5010909A JP 1090993 A JP1090993 A JP 1090993A JP H06220524 A JPH06220524 A JP H06220524A
Authority
JP
Japan
Prior art keywords
layer
roll
heat
thermal
coating layer
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.)
Granted
Application number
JP5010909A
Other languages
Japanese (ja)
Other versions
JP3160405B2 (en
Inventor
Takashi Oka
隆 岡
Satoru Midorikawa
悟 緑川
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.)
JFE Steel Corp
Tocalo Co Ltd
Original Assignee
Tocalo Co Ltd
Kawasaki Steel Corp
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 Tocalo Co Ltd, Kawasaki Steel Corp filed Critical Tocalo Co Ltd
Priority to JP01090993A priority Critical patent/JP3160405B2/en
Publication of JPH06220524A publication Critical patent/JPH06220524A/en
Application granted granted Critical
Publication of JP3160405B2 publication Critical patent/JP3160405B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Other Surface Treatments For Metallic Materials (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To improve the adhesion of a thermal-sprayed layer and to impart an excellent heat insulating property by providing a fase coating layer consisting of a heat resistant alloy thermal-sprayed layer and a zirconia thermal-sprayed layer on a roll base material and providing a cermet thermal-sprayed coating layer on the base coating layer. CONSTITUTION:The surface of the water-cooling roll base material is roughened by blasting. On this roll base material, two thermal-sprayed base coating layers consisting of the heat resistant alloy such as Ni-Cr-Al-Y alloy and the zirconia such as stabilized zirconia are provided by a plasma thermal-spray. Successively, the cermet layer having excellent machinability consisting of BN and the heat resistant alloy is thermal-sprayed. It is desirable that the thickness of the bace coating layer is about 0.05-0.5mm for the lower layer and about 0.2-2.5mm for the upper layer and the thickness of the cermet coated layer is about 0.5-5mm.

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、高温鋼材搬送用ロール
に関し、特に、高い温度での処理が必要とされるステン
レス鋼板用熱処理炉内に設置されるロールに、耐熱性と
断熱性とを付与するために溶射被覆層を形成してなる搬
送用ロールについての提案である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll for conveying high temperature steel material, and more particularly to a roll installed in a heat treatment furnace for a stainless steel plate which requires treatment at a high temperature, to have heat resistance and heat insulation. This is a proposal for a transport roll formed by forming a thermal spray coating layer for applying.

【0002】[0002]

【従来の技術】高温鋼材、例えば熱処理ラインで処理す
る高温のステンレス鋼板などを搬送するための熱処理炉
用ハースロールとしては、表面に耐熱性材料を被覆した
ロールが用いられている。ところで、このような熱処理
炉用ハースロール(搬送用ロール), とくに温度が1200
℃を超えるような熱処理炉内の加熱帯後半部や均熱帯に
設置されている搬送用ロールというのは、搬送すべき材
料(ステンレス鋼板) が軟化しているために、ロール表
面のわずかな変化でも、それが原因となって、かかる搬
送材(ステンレス鋼板)に疵を発生させやすいという傾
向がある。それゆえに表面の状態が長期にわたって安定
していることが重要である。
2. Description of the Related Art As a hearth roll for a heat treatment furnace for conveying a high temperature steel material, for example, a high temperature stainless steel plate processed in a heat treatment line, a roll having a surface coated with a heat resistant material is used. By the way, such heat treatment furnace hearth rolls (transport rolls), especially at a temperature of 1200
Conveying rolls installed in the latter half of the heating zone in the heat treatment furnace where the temperature exceeds ℃ or in the soaking zone are slightly changed due to the softening of the material (stainless steel plate) to be conveyed. However, due to this, there is a tendency that defects are likely to occur in the carrier material (stainless steel plate). Therefore, it is important that the surface condition is stable for a long period of time.

【0003】一方、ロールそれ自体に着目すると、この
搬送用ロールの本体部分は、高温の雰囲気下で使用され
るものであるから、その中心部分が水冷されているのが
普通である。したがって、通板面となるこのロール表面
は、断熱材料などで被覆されることが必要であり、この
断熱材料によって搬送材の温度低下を防ぐようにしてい
る。しかも、このような目的の下に使用される断熱被覆
材料は、ロールに上述した疵をつけない物質であること
が必要である。例えば、アスベストとかシリカ・アルミ
ナ繊維などが代表的な被覆材料であった。このような搬
送用被覆ロールの例としては、従来、特開平1−290712
号公報や特開平1−301818号公報に開示されているよう
なものがある。これらの従来ロールは、いわゆるロール
軸芯のまわりに、円板状の耐熱性断熱シートを軸方向に
積層して断熱層とし、この断熱層の構造を工夫すること
により、耐久性や耐ビルドアップ特性を改善することと
したものである。しかしながら、上記の従来搬送用ロー
ルは、以下に説明するような各種の問題点を抱えてい
た。
On the other hand, paying attention to the roll itself, since the main body of the carrying roll is used in a high temperature atmosphere, the central part thereof is usually water-cooled. Therefore, it is necessary that the surface of the roll, which is the passing surface, be covered with a heat insulating material or the like, and this heat insulating material prevents the temperature of the conveying material from decreasing. Moreover, the heat-insulating coating material used for such purpose needs to be a substance which does not cause the above-mentioned flaws on the roll. For example, asbestos and silica / alumina fibers were typical coating materials. As an example of such a transporting coating roll, there is conventionally known JP-A-1-290712.
Japanese Patent Laid-Open Publication No. 301818/1993. In these conventional rolls, a disc-shaped heat-resistant heat-insulating sheet is axially laminated around a so-called roll axis to form a heat-insulating layer, and durability and build-up resistance are improved by devising the structure of this heat-insulating layer. It is intended to improve the characteristics. However, the above-described conventional transport roll has various problems as described below.

【0004】一般に、従来の搬送用ロールというのは、
水冷ロールのロール軸芯まわりに装着する耐熱性断熱部
材の被覆層が、ドーナツ状のアスベストや耐熱性無機質
繊維をロールの軸方向に嵌め入れて積層し、かつ圧縮し
て所定の外径寸法に仕上げたもので構成されている。と
ころが、このようなドーナツ状シート状物をロールに嵌
挿する作業は、多大の労力と時間とが必要であった。し
かも、この従来搬送ロールを、実際の熱処理炉で使用し
た結果によれば、ロール表面を形造る被覆層がシート状
物の積層構造であるために、被覆構成物であるアスベス
トや無機質繊維の劣化や硬化が激しく、短期間のうちに
ロールから脱落する現象が見られ、そのため短時間で使
用不能になって操業を停止しなければならないという問
題点があった。さらに、この従来搬送ロールについて
は、ステンレス鋼板の表面に発生するスケールがロール
の表面に付着し、そのロール表面への付着スケールによ
って、後続の搬送材料(ステンレス鋼板)の表面が傷つ
けられるという、いわゆるビルドアップの弊害が、依然
として解消されていないという課題も残していた。
Generally, the conventional transport roll is
The coating layer of the heat-resistant heat-insulating member to be installed around the roll shaft core of the water-cooled roll is such that donut-shaped asbestos and heat-resistant inorganic fibers are fitted and laminated in the axial direction of the roll, and compressed to a predetermined outer diameter dimension. It is composed of finished products. However, the work of inserting such a doughnut-shaped sheet into a roll requires a great deal of labor and time. Moreover, according to the result of using this conventional transport roll in an actual heat treatment furnace, since the coating layer forming the roll surface has a laminated structure of a sheet-like material, deterioration of asbestos and inorganic fibers which are coating components is caused. There is a problem in that it hardens and hardens, and the roll falls off from the roll within a short period of time, so that the roll becomes unusable and the operation must be stopped in a short time. Further, in this conventional transport roll, the scale generated on the surface of the stainless steel plate adheres to the surface of the roll, and the scale attached to the roll surface damages the surface of the subsequent transport material (stainless steel plate). There was also a problem that the bad effects of build-up were not solved yet.

【0005】[0005]

【発明が解決しようとする課題】ところで、発明者ら
は、かつて特願平2−211691号(特開平4−99813 号公
報) において、ロール被覆層として、従来の無機質繊維
を主材とするシート材を積層していく構造のものに代
え、被削性のよいサーメットを溶射被覆する技術を提案
した。
SUMMARY OF THE INVENTION By the way, the inventors of the present invention, in Japanese Patent Application No. 2-211691 (Japanese Patent Application Laid-Open No. 4-99813), used a sheet containing a conventional inorganic fiber as a main material as a roll coating layer. We proposed a technique of thermal spray coating a cermet with good machinability, instead of a structure in which materials are laminated.

【0006】かかるサーメット溶射被覆層を有する高温
鋼材搬送用ロールは、ロール表面性状が長期間に亘って
常に安定していてビルドアップが発生しにくいという優
れた特性を有しているが、時として溶射被覆層の剥離が
起こるという、なお解決を必要とする課題を残してい
た。
The high-temperature steel material-conveying roll having such a cermet thermal spray coating layer has an excellent property that the roll surface property is always stable for a long period of time and build-up hardly occurs. A problem that still needs to be solved, that is, peeling of the thermal spray coating layer, remains.

【0007】本発明の目的は、発明者らが先行提案した
上記従来技術が抱えていた解決課題を有利に克服するこ
とにある。即ち、搬送用水冷ロール外周に形成する溶射
被覆層の密着性を向上させることができると共に、一層
良好な断熱性を有する高温鋼材搬送用ロールを開発し提
案することにある。
An object of the present invention is to advantageously overcome the problem to be solved by the above-mentioned prior art proposed by the inventors. That is, it is an object of the present invention to develop and propose a roll for transporting a high-temperature steel material, which can improve the adhesion of the thermal spray coating layer formed on the outer periphery of the transport water-cooled roll and has further excellent heat insulating properties.

【0008】[0008]

【課題を解決するための手段】上述した従来技術が抱え
ている課題の解決について鋭意研究した結果、下記の如
き構成のロールにすることが有効であることが判った。
すなわち、本発明は、外周に耐熱性断熱材料の溶射被覆
層を形成してなる水冷ロールにおいて、このロール基材
の外周に粗化面を設け、このロール粗化面上には、基材
側に形成された耐熱合金溶射層とその上層に形成された
ジルコニア溶射層とからなる二層下地溶射被覆層を設
け、そしてこの下地溶射被覆層上には被削性を有するサ
ーメット溶射被覆層を設けてなる高温鋼材搬送用ロール
である。
As a result of earnest research on solving the problems of the above-mentioned conventional techniques, it has been found that it is effective to use a roll having the following structure.
That is, the present invention provides a roughened surface on the outer periphery of the roll base material in a water-cooled roll formed with a thermal spray coating layer of a heat resistant heat insulating material on the outer periphery, and the base material side is provided on the roughened surface of the roll base material. Provided a two-layer undercoating thermal spray coating layer consisting of a heat-resistant alloy sprayed layer formed on the above and a zirconia sprayed layer formed thereon, and providing a cermet sprayed coating layer having machinability on this undercoat thermal spray coating layer. It is a roll for conveying high temperature steel material.

【0009】[0009]

【作用】本発明にかかるステンレス鋼等高温鋼材搬送用
(ハース)ロールというのは、中空水冷構造とした耐熱
鋼製ロールの外周に、耐熱性と断熱性とに優れると共
に、被削性(被覆した前記溶射皮膜が接触する相手材
(搬送材)によって容易に摩滅していく性質を具えてい
ること)を具えるサーメット材料を溶射被覆して被削性
に優れた溶射被覆層を設けた構造を有するものである。
The roll for conveying high-temperature steel such as stainless steel according to the present invention (hearth) is a heat-resistant steel roll having a hollow water-cooled structure, which is excellent in heat resistance and heat insulation and has machinability (coating property). A structure in which a cermet material having a property of being easily worn away by a mating material (conveying material) with which the above-mentioned sprayed coating comes into contact is sprayed to provide a sprayed coating layer having excellent machinability. Is to have.

【0010】そして、本発明の構成の特徴は、中空水冷
構造の耐熱鋼製ロール基材の表面をブラスト処理して粗
化面とし、このロール粗化面に熱の衝撃に強く熱膨張,
収縮に追随できる耐熱合金(下層)と断熱性に優れたセ
ラミックスとして高温で熱的に安定したジルコニア(上
層)とを順次溶射被覆してなる二重構造の下地(アンダ
ーコート)層を形成し、このアンダーコート層上に被削
性に優れたサーメット材料を溶射被覆した多層被覆層と
した点の構造にある。
The feature of the constitution of the present invention is that the surface of the heat-resistant steel roll base material having a hollow water-cooled structure is blasted to form a roughened surface, and the roughened surface of the roll has a strong thermal expansion against thermal shock and a thermal expansion.
A double-structured undercoat (undercoat) layer is formed by sequentially spray-coating a heat-resistant alloy (lower layer) that can follow shrinkage and thermally stable zirconia (upper layer) as ceramics with excellent heat insulation properties, This structure has a multilayer coating layer in which a cermet material having excellent machinability is spray-coated on the undercoat layer.

【0011】さて、アンダーコートの下層を形成する上
記耐熱合金の例としては、“MCrAlY”と呼ばれるNi−
Cr−Al−Y合金, Co−Cr−Al−Y合金, Co−Ni−Cr−Al
−Y合金などがよく適合し、一方、アンダーコートの上
層を形成する上記ジルコニアの例としては、ZrO2−Y2O3
やZrO2−CeOなどの部分安定化ジルコニアがよく適合す
る。
Now, as an example of the above-mentioned heat-resistant alloy which forms the lower layer of the undercoat, Ni- called "MCrAlY" is used.
Cr-Al-Y alloy, Co-Cr-Al-Y alloy, Co-Ni-Cr-Al
Such is well suited -Y alloy, whereas, examples of the zirconia to form the upper layer of the undercoat, ZrO 2 -Y 2 O 3
Partially stabilized zirconia such as ZrO 2 -CeO and the like are well suited.

【0012】また、表面被覆層(トップコート層)を形
成する溶射被覆層としては、耐熱性と断熱特性に優れ、
かつ搬送ステンレスのかじりを起こさないように被削性
に優れたサーメット溶射被覆層が好適であり、そのよう
なサーメット溶射被覆層としては、BNを4〜10wt%含
み残部がNi, Co, Cr, Fe, Alを含む各種の耐熱合金より
なる溶射材料、あるいは焼成ベントナイトを15〜30wt%
含み残部が同じく耐熱合金からなる溶射材料が好適であ
り、そしてそのサーメット溶射被覆層の厚さは0.5〜5m
mの層厚にすることが好適であると言える。なお、サー
メット中に混合する耐熱合金としては、上記アンダーコ
ート層の耐熱合金と共金のものを用いることも有効な手
段の1つである。
Further, the thermal spray coating layer forming the surface coating layer (top coat layer) has excellent heat resistance and heat insulation properties,
A cermet sprayed coating layer having excellent machinability so as not to cause galling of the conveyed stainless steel is suitable. As such a cermet sprayed coating layer, BN is contained in an amount of 4 to 10 wt% and the balance is Ni, Co, Cr, 15 to 30 wt% of thermal spray material consisting of various heat resistant alloys including Fe and Al, or calcined bentonite
A thermal spray material whose balance is also made of a heat resistant alloy is suitable, and the thickness of the cermet thermal spray coating layer is 0.5 to 5 m.
It can be said that a layer thickness of m is suitable. As the heat-resistant alloy mixed in the cermet, it is also an effective means to use a heat-resistant alloy of the undercoat layer and a metal alloy.

【0013】このような構成を有する本発明の高温鋼材
搬送用ロールは、 ロール基材表面がブラストによる粗化処理がされてい
るから、アンダーコート層の特に下層の耐熱合金層との
密着強度が高い。 アンダーコート層の下層を構成する耐熱合金の存在
は、その上層を構成する断熱皮膜(部分安定化ジルコニ
ア)との結合力に優れており、それ故にこのアンダーコ
ート層が上層であっても密着強度の向上は却って向上す
る。 アンダーコート層を二重構造とすることにより、ロー
ル基材と被削性を具える溶射被覆層との両方に対する密
着性を向上させると同時に、断熱性をより一層向上させ
るという効果を発揮する。
The high-temperature steel material-conveying roll of the present invention having such a constitution has a roughening treatment by blasting on the surface of the roll base material, so that the adhesion strength of the undercoat layer, particularly the lower heat-resistant alloy layer, is improved. high. The existence of the heat-resistant alloy that constitutes the lower layer of the undercoat layer has an excellent bonding strength with the heat insulating coating (partially stabilized zirconia) that constitutes the upper layer of the undercoat layer. Therefore, even if this undercoat layer is the upper layer, the adhesion strength is high. The improvement of is rather improved. The double structure of the undercoat layer has the effect of improving the adhesion to both the roll base material and the thermal spray coating layer having machinability, and at the same time further improving the heat insulating property.

【0014】上記ロール基材表面の粗化は、ブラスト処
理により粗さRa:10〜30μm程度にする。この粗さRa:
10μm未満ではアンカー効果が劣り、密着性が低下して
剥離する危険があり、一方Ra:30μmを超えると皮膜に
切り欠き作用を起こしクラックの発生がある。
The surface of the roll base material is roughened by blasting to a roughness Ra of about 10 to 30 μm. This roughness Ra:
If it is less than 10 μm, the anchoring effect is poor and the adhesion is lowered, and there is a risk of peeling. On the other hand, if it exceeds 30 μm Ra, a notch action occurs in the film and cracks occur.

【0015】上記アンダーコート層は、上層, 下層とも
いずれもプラズマ方式による溶射によって被覆形成する
が、それぞれの溶射被覆層の厚みは、下層の耐熱合金層
の場合、0.05〜0.5 mmとし、上層のジルコニア層の場合
0.2〜2.5 mmとする。これらの厚みはそれぞれの下限を
下回ると緩衝効果, 断熱効果が劣り、また、それぞれの
上限値を上回ると皮膜内応力が強くなり剥離するので、
上記のように限定した。
Both the upper layer and the lower layer are formed by thermal spraying by a plasma method, and the thickness of each thermal spray coating layer is 0.05 to 0.5 mm in the case of the lower heat-resistant alloy layer. For zirconia layer
0.2 to 2.5 mm. If these thicknesses are below the respective lower limits, the buffering effect and the heat insulating effect are inferior, and if the thicknesses are above the respective upper limits, the in-film stress becomes strong and peeling occurs.
Limited as above.

【0016】上記サーメット溶射被覆層は、ガス燃焼方
式溶射被覆によって形成する。その被覆の厚さは 0.5〜
5mmとする。0.5 mm未満では摩滅期間が短く、寿命延長
が図れないし、5mmを超えると皮膜内応力が強くなり剥
離することから、上記範囲内の厚みに限定した。
The cermet spray coating layer is formed by gas combustion spray coating. The coating thickness is 0.5 ~
Set to 5 mm. If it is less than 0.5 mm, the abrasion period is short and the life cannot be extended, and if it exceeds 5 mm, the stress in the film becomes strong and the film peels off. Therefore, the thickness is limited to the above range.

【0017】なお、上記サーメット溶射被覆層の表面に
ついては、さらに表面粗度Ra:10μm以内となるように
研磨することが望ましい。
The surface of the cermet thermal spray coating layer is preferably further polished so that the surface roughness Ra is within 10 μm.

【0018】[0018]

【実施例】生産能力24,000トン/月のステンレス鋼板用
熱処理炉に、本発明にかかる図1に示すような搬送用ロ
ールを適用設置し、主として寿命についての試験を行っ
た。その結果を表1にまとめて示す。
[Example] A transfer roll as shown in FIG. 1 according to the present invention was applied and installed in a heat treatment furnace for a stainless steel plate having a production capacity of 24,000 tons / month, and a test for the life was mainly conducted. The results are summarized in Table 1.

【0019】(1) 比較に供した従来アスベスト被覆ロー
ル(No.1) は、生産量が6000トンになると、表面を覆う
アスベストが脱落した。また、シリカ・アルミナ繊維の
被覆ロール(No.2)も、6000トンを処理した段階でビルド
アップが発生し、ステンレス鋼板の疵が心配されたの
で、取り外した。
(1) In the conventional asbestos-coated roll (No. 1) used for comparison, when the production amount reached 6000 tons, the asbestos covering the surface fell off. Also, the silica-alumina fiber coating roll (No. 2) was removed because buildup occurred at the stage of treating 6000 tons and there was a concern that the stainless steel plate would be flawed.

【0020】(2) 一方、本発明例については、アンダー
コートの下層としてNiCoCrAlY 合金を、そしてその上層
としてZrO2−Y2O部分安定化ジルコニアを溶射被覆し、
またトップコート層としてBNと耐熱合金(Ni Cr Fe
Al合金)とからなるサーメットを溶射被覆したロール
(No.3)の例では、27,000トン処理した段階(約1カ月
使用した段階)で摩耗してしまったので取り外したが、
それでも従来ロールよりも著しく寿命延長が達成でき
た。また、アンダーコート中の下層としてNiCrAlY 合金
を、そしてその上層としてZrO2−CeO部分安定化ジルコ
ニアを溶射被覆し、またトップコート層としてベントナ
イトと耐熱合金(Ni Cr Al合金)とからなるサーメッ
トを溶射被覆したロール(No.4)は、36,000トン処理し
た段階(約1.3カ月使用した段階)で摩耗してしまった
ので取り外したが、それでも従来ロールよりも大幅な寿
命延長を達成した。
(2) On the other hand, in the examples of the present invention, a NiCoCrAlY alloy was used as the lower layer of the undercoat, and a ZrO 2 --Y 2 O partially stabilized zirconia was thermally spray coated as the upper layer thereof,
BN and heat-resistant alloy (Ni Cr Fe
Roll coated with cermet by thermal spray coating
In the case of (No. 3), it was worn out at the stage of processing 27,000 tons (the stage of using it for about 1 month), so it was removed,
Even so, the service life was significantly extended compared to the conventional roll. In addition, a NiCrAlY alloy is sprayed as a lower layer in the undercoat, and ZrO 2 -CeO partially stabilized zirconia is spray-coated as an upper layer, and a cermet made of bentonite and a heat-resistant alloy (Ni Cr Al alloy) is sprayed as a topcoat layer. The coated roll (No. 4) was worn out at the stage of treating 36,000 tons (the stage of using it for about 1.3 months), so it was removed, but it still achieved a much longer life than the conventional roll.

【0021】(3) これに対し、アンダーコート層として
単にNiCrAlY 耐熱合金のみを溶射被覆し、そしてすぐそ
の上にトップコートとして上記と同じベントナイト系サ
ーメットを被覆したロール(No.5)は、18,000トン処理し
た段階でロール曲がりによる偏摩耗が大きくなったので
取り外したが、それでも従来ロールよりも寿命が延びた
が、供試材No.3, 4 ほどではなかった。
(3) On the other hand, a roll (No. 5) in which only the NiCrAlY heat-resistant alloy was merely spray-coated as the undercoat layer and immediately above it was coated with the same bentonite cermet as the topcoat (No. 5) was 18,000. Although it was removed because the uneven wear due to the bending of the roll became large at the stage of ton treatment, the life of the roll was still longer than that of the conventional roll, but it was not as high as that of sample Nos. 3 and 4.

【0022】[0022]

【表1】 [Table 1]

【0023】[0023]

【発明の効果】以上説明したように、本発明にかかる高
温鋼材搬送用ロールは、その表面に形成した溶射皮膜の
特性から断熱性に優れるために過冷却現象がなく、それ
故にビルドアップが自動的に消滅するので搬送されるス
テンレス鋼板に疵をつけることもなく、しかも初期状態
のまま長時間安定した表面状態を維持して使用すること
ができる。しかも、アンダーコート層を下層の耐熱合金
と上層のジルコニア層との2層構造とし、かつロール基
材の表面を粗化したことにより、溶射皮膜の密着性が大
きくなり、そのために寿命が著しく向上する。
As described above, the high-temperature steel material-conveying roll according to the present invention does not have a supercooling phenomenon due to the excellent heat insulating property due to the characteristics of the sprayed coating formed on the surface thereof, and therefore the build-up is automatic. Since the stainless steel sheet to be conveyed does not have a flaw, it can be used while maintaining a stable surface state for a long time in the initial state. Moreover, the undercoat layer has a two-layer structure of a lower heat-resistant alloy and an upper zirconia layer, and the surface of the roll base material is roughened, so that the adhesiveness of the thermal spray coating is increased, and therefore the life is remarkably improved. To do.

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

【図1】本発明高温鋼材搬送用ロールの部分切欠き断面
図である。
FIG. 1 is a partially cutaway sectional view of a roll for conveying high-temperature steel according to the present invention.

【符号の説明】[Explanation of symbols]

1 ロール基材 2 耐熱合金溶射被覆層(下層アンダーコート) 3 部分安定化ジルコニア溶射被覆層(上層アンダーコ
ート) 4 サーメット溶射被覆層 5 冷却水
1 Roll Substrate 2 Heat Resistant Alloy Sprayed Coating Layer (Lower Layer Undercoat) 3 Partially Stabilized Zirconia Sprayed Coating Layer (Upper Layer Undercoat) 4 Cermet Sprayed Coating Layer 5 Cooling Water

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 外周に耐熱性断熱材料の溶射被覆層を形
成してなる水冷ロールにおいて、このロール基材の外周
に粗化面を設け、このロール粗化面上には、基材側に形
成された耐熱合金溶射層とその上層に形成されたジルコ
ニア溶射層とからなる二層下地溶射被覆層を設け、そし
てこの下地溶射被覆層上には被削性を有するサーメット
溶射被覆層を設けてなる高温鋼材搬送用ロール。
1. A water-cooled roll having a thermal spray coating layer of a heat-resistant heat insulating material formed on the outer circumference thereof, wherein a roughened surface is provided on the outer circumference of the roll base material, and the roughened surface is provided on the base material side. Providing a two-layer base thermal spray coating layer consisting of a heat-resistant alloy thermal spray layer formed and a zirconia thermal spray layer formed on it, and providing a cermet thermal spray coating layer having machinability on this base thermal spray coating layer. High temperature steel transport roll.
JP01090993A 1993-01-26 1993-01-26 Roll for transporting high-temperature steel Expired - Fee Related JP3160405B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP01090993A JP3160405B2 (en) 1993-01-26 1993-01-26 Roll for transporting high-temperature steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP01090993A JP3160405B2 (en) 1993-01-26 1993-01-26 Roll for transporting high-temperature steel

Publications (2)

Publication Number Publication Date
JPH06220524A true JPH06220524A (en) 1994-08-09
JP3160405B2 JP3160405B2 (en) 2001-04-25

Family

ID=11763418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP01090993A Expired - Fee Related JP3160405B2 (en) 1993-01-26 1993-01-26 Roll for transporting high-temperature steel

Country Status (1)

Country Link
JP (1) JP3160405B2 (en)

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JP4650514B2 (en) * 2008-04-04 2011-03-16 コニカミノルタオプト株式会社 Optical element molding method
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WO2023191090A1 (en) * 2022-03-31 2023-10-05 トーカロ株式会社 Steel sheet transportation roll
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