JPH08120434A - Immersion roll for continuous hot dip galvanizing - Google Patents
Immersion roll for continuous hot dip galvanizingInfo
- Publication number
- JPH08120434A JPH08120434A JP6257967A JP25796794A JPH08120434A JP H08120434 A JPH08120434 A JP H08120434A JP 6257967 A JP6257967 A JP 6257967A JP 25796794 A JP25796794 A JP 25796794A JP H08120434 A JPH08120434 A JP H08120434A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- roll
- cermet
- immersion roll
- alloy
- 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
Links
- 238000005246 galvanizing Methods 0.000 title claims abstract description 14
- 238000007654 immersion Methods 0.000 title claims abstract description 9
- 239000011195 cermet Substances 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract description 10
- 238000007598 dipping method Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 6
- 238000007747 plating Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 25
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 13
- 239000011701 zinc Substances 0.000 description 13
- 229910052725 zinc Inorganic materials 0.000 description 13
- 239000011148 porous material Substances 0.000 description 7
- 238000005507 spraying Methods 0.000 description 7
- 238000007751 thermal spraying Methods 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 206010040844 Skin exfoliation Diseases 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005524 ceramic coating Methods 0.000 description 4
- 229910000765 intermetallic Inorganic materials 0.000 description 4
- 230000006355 external stress Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910009043 WC-Co Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0034—Details related to elements immersed in bath
- C23C2/00342—Moving elements, e.g. pumps or mixers
- C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/123—Spraying molten metal
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は連続溶融亜鉛メッキライ
ンのメッキ浴中で使用する連続溶融亜鉛メッキ用浸漬ロ
ールに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dipping roll for continuous hot dip galvanizing used in a plating bath of a continuous hot dip galvanizing line.
【０００２】[0002]
【従来の技術】従来の溶融亜鉛メッキラインのメッキ浴
中で使用する浸漬ロールは、ステンレス鋼のロール基材
の表面、つまりその胴部で鋼帯に接する側に、溶融亜鉛
と反応し難くしかも耐磨耗性のある皮膜が溶射により形
成されていた。例えば、特開昭５９−１５３８７５号公
報にはＣｏ基自溶性合金が、特開平１−２２５７６１号
公報にはＷＣ−Ｃｏサーメット等を溶射する技術が提案
されている。2. Description of the Related Art A conventional dipping roll used in a galvanizing bath of a hot-dip galvanizing line is hard to react with hot-dip zinc on the surface of a stainless steel roll base material, that is, on the side of the body that contacts the steel strip. A film having abrasion resistance was formed by thermal spraying. For example, Japanese Patent Application Laid-Open No. 59-153875 proposes a technique for spraying a Co-based self-fluxing alloy, and Japanese Patent Application Laid-Open No. 1-225761 proposes a technique for spraying a WC-Co cermet or the like.
【０００３】これらの溶射皮膜を持つ浸漬ロールは、ス
テンレス鋼を直に使用していた時にくらべ亜鉛との反応
を抑え、しかも硬度が高いため亜鉛に対する耐蝕性と鋼
帯に対する耐磨耗性において一応の性能を発揮してきた
が、サーメット中のＣｏの成分が亜鉛中に拡散して皮膜
中のＷＣ比率が高くなり脆化して、ＷＣ−Ｃｏサーメッ
トの剥離トラブルを誘発するという問題があり、その性
能は必ずしも十分なものではなかった。The dip roll having these sprayed coatings suppresses the reaction with zinc when stainless steel is directly used, and has a high hardness, so that the corrosion resistance against zinc and the wear resistance against steel strip are tentatively decided. However, there is a problem that the component of Co in the cermet diffuses into zinc, the WC ratio in the coating becomes high and the film becomes brittle, and causes peeling trouble of the WC-Co cermet. Was not always enough.
【０００４】最近では、亜鉛との反応が無くしかも硬度
が高く耐磨耗性に優れる特願平５−１７４９０号にて発
明者らが提案した、ロール表面に窒化珪素皮膜、または
窒化珪素皮膜の珪素をアルミニウムで、窒素を酸素で置
換固溶した皮膜を形成させた溶融亜鉛メッキロールが使
用されるようになってきた。Recently, a silicon nitride film or a silicon nitride film formed on the roll surface was proposed by the inventors in Japanese Patent Application No. 5-17490, which has no reaction with zinc and has high hardness and excellent abrasion resistance. A hot-dip galvanizing roll having a film formed by replacing aluminum for silicon and nitrogen for oxygen to form a solid solution has come to be used.
【０００５】セラミック皮膜を形成する方法として溶射
が用いられるが、溶射により形成した皮膜の内部には気
泡が存在し、皮膜を貫通する形で存在するものもある。
このような貫通する気孔はセラミックあるいはサーメッ
ト系の皮膜に必ず存在するもので、皮膜の形成を溶射法
に依存する限り不可避的な問題である。また、ロール表
面にセラミック皮膜を溶射する場合、ステンレス系のロ
ール基材との熱膨張差により熱応力が生じて皮膜に亀裂
が発生する。熱応力を少しでも緩和するために、下層に
サーメットを溶射することもあるがサーメット皮膜にも
気孔が存在する。しかも、下層の場合、上層との密着性
を確保するため、一般に化学密着化法等による封孔処理
ができないため亀裂あるいは気孔を通過する亜鉛の浸透
は防止できないのが実情であった。Thermal spraying is used as a method for forming a ceramic coating, but there are also those in which bubbles are present inside the coating formed by thermal spraying and penetrate through the coating.
Such penetrating pores are always present in the ceramic or cermet type coating and are an unavoidable problem as long as the formation of the coating depends on the thermal spraying method. Further, when the ceramic coating is sprayed on the roll surface, thermal stress is generated due to the difference in thermal expansion from the stainless roll base material, and cracks are generated in the coating. In order to reduce the thermal stress as much as possible, the cermet may be sprayed on the lower layer, but the cermet coating also has pores. In addition, in the case of the lower layer, in order to secure the adhesiveness with the upper layer, it is impossible to prevent the penetration of zinc through cracks or pores because the sealing treatment by the chemical adhesion method or the like cannot be generally performed.
【０００６】[0006]
【発明が解決しようとする課題】上層のセラミック皮膜
と下層のサーメット皮膜の貫通気孔部を浸透して通過し
た溶融亜鉛はやがてステンレス系ロール表面に到達して
ロール基材と接触した部分でステンレス系の化学組成の
うち、主にＦｅと反応して、Ｚｎ−Ｆｅの合金あるいは
メッキ浴中にＡｌを添加している場合はＺｎ−Ｆｅ−Ａ
ｌの３元金属間化合物をつくる。この金属間化合物は体
積膨張を伴うため、下層と上層の双方の皮膜を、下から
押し上げる形で皮膜を部分的に剥離させる。発明者らの
経験ではこのようなトラブルがあった場合は、ロールと
鋼帯が接触する外部応力を受ける部分において直径３〜
５ｍｍの円形剥離が無数に発生した。The molten zinc that has penetrated and passed through the through-holes of the upper ceramic coating and the lower cermet coating eventually reaches the surface of the stainless steel roll and reaches the stainless steel roll at the portion where it contacts the roll base material. Zn-Fe-A in the chemical composition of Zn-Fe-A, which mainly reacts with Fe and adds Al to the Zn-Fe alloy or plating bath.
1. Make ternary intermetallic compound. Since this intermetallic compound is accompanied by volume expansion, the coatings of both the lower layer and the upper layer are partially peeled off by pushing up from below. According to the experience of the inventors, when such a trouble occurs, the diameter of the roll 3 and the steel strip contacting the external stress is 3 to
Countless 5 mm circular peelings occurred.
【０００７】このため、セラミックあるいはサーメット
溶射で不可避的に発生する貫通気孔を通過した亜鉛が、
ステンレス系のロール基材に到達するのを阻止するため
の遮蔽層を下層のサーメット溶射とロール基材間に付与
し、しかもこの遮蔽層に万一亜鉛が貫通しても自己封止
するような特性を持たすことが必要で、本発明はこの点
の解決手段を提供することを目的とする。For this reason, zinc that has passed through the through-pores inevitably generated by ceramic or cermet thermal spraying is
A shielding layer to prevent it from reaching the stainless steel roll base material is applied between the cermet thermal spraying of the lower layer and the roll base material, and even if zinc penetrates this shielding layer, it will self-seal. It is necessary to have characteristics, and an object of the present invention is to provide a solution to this point.
【０００８】[0008]
【課題を解決するための手段】即ち本発明は、亜鉛メッ
キ浴中で使用する浸漬ロール表面に該ロール表面側か
ら、第１層目としてＣｏ比率の高い合金，またはこの合
金比率の高いサーメット、第２層目として酸化物または
炭化物を含むサーメット、第３層目として酸化物系のセ
ラミックの３層の溶射皮膜を形成させたことを特徴とす
る連続溶融亜鉛メッキ用浸漬ロールを要旨とするもので
ある。That is, the present invention relates to an immersion roll surface used in a galvanizing bath, from the roll surface side, an alloy having a high Co ratio as the first layer, or a cermet having a high alloy ratio, A dipping roll for continuous hot dip galvanizing characterized in that a cermet containing an oxide or a carbide is formed as a second layer, and a three-layer thermal spray coating of an oxide-based ceramic is formed as a third layer. Is.
【０００９】[0009]
【作用】浸漬ロール表面側から、第１層目として、Ｃｏ
を含む合金，またはこの合金の比率の高い合金，あるい
はこの合金比率の高いサーメット溶射皮膜を設けるの
は、この種の溶射皮膜は沸点が１５００℃前後で他のサ
ーメットやセラミックに比較して低いため、溶射フレー
ムの温度でこの部分が溶けるため皮膜の気孔が極めて少
ないためである。[Function] From the surface side of the dipping roll, Co is used as the first layer.
The alloy containing, or alloy with a high ratio of this alloy, or cermet thermal spray coating with a high ratio of this alloy is provided because the thermal spray coating of this kind has a boiling point around 1500 ° C and is lower than other cermets and ceramics. This is because this portion melts at the temperature of the flame spraying frame, and the number of pores in the coating is extremely small.
【００１０】また、これらの合金自体が亜鉛との反応性
が小さく、亜鉛との間でつくる金属間化合物の形成速度
も遅いため、貫通気孔が存在しても、気孔内で形成した
金属間化合物が封止材となって自己閉塞するためであ
る。Further, since these alloys themselves have a low reactivity with zinc and the formation rate of the intermetallic compound formed with zinc is slow, the intermetallic compound formed in the pores even if the through pores exist. Is a sealing material and self-closes.
【００１１】第２層目として酸化物または炭化物を含む
サーメットとするのは、この種のサーメットは表１に示
すように熱膨張率がステンレス鋼とセラミックの中間に
あることと、皮膜が高硬度で、しかも機械的強度が高い
ため鋼帯接触時の外部応力に対して変形が少なく、第３
層目のセラミック層のひずみ量を最小にするためであ
る。A cermet containing an oxide or a carbide is used as the second layer because the cermet of this kind has a coefficient of thermal expansion between that of stainless steel and ceramic as shown in Table 1 and that the coating has a high hardness. In addition, since the mechanical strength is high, deformation is small against external stress when the steel strip comes into contact,
This is to minimize the strain amount of the ceramic layer of the first layer.
【００１２】第３層目を酸化物系のセラミックとするの
は、セラミック自体の亜鉛との反応が極めて緩慢で第１
層目と第２層目に形成したサーメットあるいは合金の溶
射皮膜を保護するためである。The oxide-based ceramic is used for the third layer because the reaction of the ceramic itself with zinc is extremely slow.
This is to protect the cermet or alloy sprayed coating formed on the second and second layers.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【実施例】第１層目にＮｉ−Ｃｏ−Ｃｒを含む合金を溶
射した後、第２層目にＭｏサーメットを溶射し、第３層
目に部分安定化ＺｒＯ2 を主体としたセラミックの皮膜
を溶射して形成（表２にその時の各層の熱膨張率を示
す）した２０ｍｍφ×２００ｍｍ長さの棒状のテストピ
ースを作成後、４５０℃でＡｌを０．２％添加した実験
用の溶融亜鉛浴に長期間にわたり、テストピース長さの
うち１００ｍｍの深さまで浸漬させた結果、１８０日間
浸漬して１ｍｍ程度の剥離が発生したのみであった。こ
れに対して、下層にサーメットを直接溶射後上層にＺｒ
Ｏ2 系溶射皮膜を形成させた前記特開平１−２２５７６
１号による比較例のテストピースでは、表層に３ｍｍφ
程度の円形剥離が３〜４箇所発生した。EXAMPLE A ceramic coating mainly composed of partially stabilized ZrO 2 was sprayed on the second layer after spraying an alloy containing Ni—Co—Cr on the first layer. After manufacturing a rod-shaped test piece of 20 mmφ × 200 mm length formed by thermal spraying (Table 2 shows the thermal expansion coefficient of each layer at that time), 0.2% Al was added at 450 ° C. As a result of immersing the test piece in the bath to a depth of 100 mm out of the length of the test piece for a long time, only about 1 mm of peeling occurred after 180 days of immersion. On the other hand, after directly spraying the cermet on the lower layer, Zr is applied on the upper layer.
The above-mentioned Japanese Patent Laid-Open No. 1-22576 in which an O 2 -based sprayed coating is formed.
In the test piece of the comparative example according to No. 1, 3 mmφ on the surface layer
Circular peeling occurred in 3 to 4 places.
【００１５】また、本発明による３層の皮膜を施した浸
漬ロールを連続溶融亜鉛メッキラインで実際に使用した
結果、鋼帯から受ける外部応力のため実験浴の浸漬テス
トに比べ短命ではあったが、それでも１２０日以上の耐
用性があることを確認した。同じ連続溶融亜鉛メッキラ
インで前記比較例の皮膜を施した浸漬ロールを使用した
テストでは、２４日間で円形剥離が発生していることか
ら、本発明の優位性が確認できた。Further, as a result of actually using the dipping roll coated with three layers according to the present invention in a continuous hot-dip galvanizing line, it was shorter in life than the dipping test in the experimental bath due to external stress received from the steel strip. However, it has been confirmed that it has a durability of 120 days or more. In the test using the dipping roll coated with the film of the comparative example in the same continuous hot-dip galvanizing line, circular exfoliation occurred in 24 days, confirming the superiority of the present invention.
【００１６】実施例の各層を構成する皮膜の常温に置け
る熱膨張率を表２に示す。Table 2 shows the coefficient of thermal expansion of the coatings forming the layers of the examples at room temperature.
【００１７】[0017]
【表２】 [Table 2]
【００１８】[0018]
【発明の効果】以上述べたとおり、本発明によりメッキ
浴用浸漬ロールの寿命を大幅に延長でき、浸漬ロールの
取り替え頻度の削減によって整備コトスが削減でき、ロ
ールの取り替えに伴うライン休止も削減したためライン
可動率の向上が可能になる。As described above, according to the present invention, the life of the dipping roll for the plating bath can be greatly extended, the maintenance cost can be reduced by reducing the frequency of exchanging the dipping roll, and the line suspension due to the roll exchange can be reduced. It is possible to improve the mobility.
【００１９】また、溶融亜鉛浴槽の周辺で行うロールの
取り替え作業は、機器が該浴槽の熱放射で加熱されて高
温雰囲気になっており、加えて浴槽の周囲は足元も不安
定なため作業に危険性が伴うが、本発明により取り替え
頻度が大幅に削減され、作業の安全性も確保できる。Further, the roll replacement work performed around the molten zinc bath is difficult because the equipment is heated by the heat radiation of the bath to create a high temperature atmosphere and the feet around the bath are unstable. Although there is a risk, the present invention can significantly reduce the frequency of replacement and ensure work safety.
Claims (1)
表面に、該ロール表面側から第１層目としてＣｏ比率の
高い合金，またはこれらの合金比率の高いサーメット、
第２層目として酸化物または炭化物を含むサーメット、
第３層目として酸化物系セラミックの３層の溶射皮膜を
形成させたことを特徴とする連続溶融亜鉛メッキ用浸漬
ロール。1. An immersion roll surface used in a galvanizing bath, an alloy having a high Co ratio as a first layer from the roll surface side, or a cermet having a high alloy ratio thereof,
A cermet containing an oxide or a carbide as the second layer,
A dipping roll for continuous hot dip galvanizing, characterized in that a sprayed coating of three layers of oxide-based ceramic is formed as a third layer.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25796794A JP3312709B2 (en) | 1994-10-24 | 1994-10-24 | Immersion roll for continuous galvanizing |
| KR1019950036565A KR100272298B1 (en) | 1994-10-24 | 1995-10-23 | Pot roll for continuous hot-dip galvanizing |
| EP95116671A EP0712939A3 (en) | 1994-10-24 | 1995-10-23 | Pot roll for continuous hot-dip galvanizing |
| TW084111828A TW293850B (en) | 1994-10-24 | 1995-11-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25796794A JP3312709B2 (en) | 1994-10-24 | 1994-10-24 | Immersion roll for continuous galvanizing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08120434A true JPH08120434A (en) | 1996-05-14 |
| JP3312709B2 JP3312709B2 (en) | 2002-08-12 |
Family
ID=17313709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25796794A Expired - Fee Related JP3312709B2 (en) | 1994-10-24 | 1994-10-24 | Immersion roll for continuous galvanizing |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0712939A3 (en) |
| JP (1) | JP3312709B2 (en) |
| KR (1) | KR100272298B1 (en) |
| TW (1) | TW293850B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016218947A1 (en) * | 2016-04-28 | 2017-11-02 | Sms Group Gmbh | Component for a hot dip coating plant and method for producing such |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53138905A (en) * | 1977-05-12 | 1978-12-04 | Kawasaki Steel Co | Blast furnace exit |
| JPS5558360A (en) * | 1978-10-19 | 1980-05-01 | Satoosen:Kk | Forming method for heat and abrasion resisting protective coating |
| JPS57174440A (en) * | 1981-04-20 | 1982-10-27 | Nisshin Steel Co Ltd | Member for molten metallic bath |
| JPS59153875A (en) | 1983-02-18 | 1984-09-01 | Nippon Steel Corp | Roll in galvanizing bath |
| CA1302805C (en) * | 1986-05-15 | 1992-06-09 | Thomas Alan Taylor | Liquid film coating of iron-based metals |
| JPH01225761A (en) | 1988-03-04 | 1989-09-08 | Tocalo Co Ltd | Member for metal hot dipping bath tank |
| JPH0819535B2 (en) * | 1989-08-17 | 1996-02-28 | トーカロ株式会社 | Roll for high temperature heat treatment furnace and method for manufacturing the same |
| JP3096853B2 (en) * | 1991-05-22 | 2000-10-10 | 日鉄ハード株式会社 | Conductor roll for electroplating |
| JP3577598B2 (en) * | 1992-01-29 | 2004-10-13 | 日鉄ハード株式会社 | Method for producing molten metal bath member having coating excellent in molten metal corrosion resistance and peeling resistance |
| JP3343862B2 (en) | 1992-01-31 | 2002-11-11 | 矢崎総業株式会社 | Fuse box |
| JPH06136505A (en) * | 1992-10-26 | 1994-05-17 | Sumitomo Metal Ind Ltd | Sprayed coating structure |
-
1994
- 1994-10-24 JP JP25796794A patent/JP3312709B2/en not_active Expired - Fee Related
-
1995
- 1995-10-23 KR KR1019950036565A patent/KR100272298B1/en not_active IP Right Cessation
- 1995-10-23 EP EP95116671A patent/EP0712939A3/en not_active Withdrawn
- 1995-11-08 TW TW084111828A patent/TW293850B/zh active
Also Published As
| Publication number | Publication date |
|---|---|
| TW293850B (en) | 1996-12-21 |
| JP3312709B2 (en) | 2002-08-12 |
| EP0712939A2 (en) | 1996-05-22 |
| EP0712939A3 (en) | 1996-05-29 |
| KR960014382A (en) | 1996-05-22 |
| KR100272298B1 (en) | 2000-12-01 |
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