JPH02187206A - Bridle roll for hot rolled steel sheet - Google Patents
Bridle roll for hot rolled steel sheetInfo
- Publication number
- JPH02187206A JPH02187206A JP828289A JP828289A JPH02187206A JP H02187206 A JPH02187206 A JP H02187206A JP 828289 A JP828289 A JP 828289A JP 828289 A JP828289 A JP 828289A JP H02187206 A JPH02187206 A JP H02187206A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- porosity
- bridle roll
- roll
- rolled steel
- 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.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- 239000011195 cermet Substances 0.000 claims abstract description 23
- 230000003746 surface roughness Effects 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims description 43
- 239000011248 coating agent Substances 0.000 claims description 41
- 238000005507 spraying Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 7
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 2
- 238000007751 thermal spraying Methods 0.000 abstract description 11
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 27
- 238000000034 method Methods 0.000 description 16
- 239000002245 particle Substances 0.000 description 11
- 238000007747 plating Methods 0.000 description 10
- 239000011651 chromium Substances 0.000 description 9
- 239000007921 spray Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002737 fuel gas Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 206010010904 Convulsion Diseases 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/08—Braking or tensioning arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分舒）
本発明は、熱間圧延鋼板の精製工程において用いるブラ
イドルロールに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application) The present invention relates to a bridle roll used in a refining process of hot rolled steel sheets.
（従来の技術）
熱間圧延鋼板の精製工程である熱間圧延工程、調質圧延
工程、酸洗工程および表面処理工程等において用いられ
るブライドルロール（以下単にｒロールｊともいう）に
は次に示すような機能が要求されている。(Prior art) Bridle rolls (hereinafter also simply referred to as r rolls) used in hot rolling processes, temper rolling processes, pickling processes, surface treatment processes, etc., which are the refining processes of hot rolled steel sheets, have the following: The following functions are required.
＜ｉ）通板材に対して適度のＦＪ擦係数を有し、いわゆ
るグリップ性があること、すなわち０通板材をスリップ
させないこと
■予め設定した張力を６育実に通板材に付与することが
できること
０通板材の蛇行を防止する機能を有すること■加工が容
易であって、長間間にわたって変形、減耗、局部摩耗等
の発生が少ないこと
（１１）通板材に対して、発錆、すり傷、圧痕等の表面
疵を発生させないこと
（ｉｉｉ ）表面に異物（油、鉄錆その他のダスト類）
が付着しにくいこと
（ｉｖ）上記機能が長１す１間にねたつ”ζ維持できる
こと
そこで従来からこのような機能を有するロールとしてゴ
ムライニングロールが使用されてきたが、近年になって
ブライドルロールに対する耐久性、耐摩耗性、高張力性
に対する要求の高まりにつれて鉄製ロールが使用される
ようになってきた。そこで上記の機能を満足させるため
、
（ａ）ロール材を焼入れしてその表面を研９１１ｔ、シ
ョット加工を行って５〜ｌＯ−の表面粗さに調整する山
）ロール表面に硬質Ｃｒめっきを施すといった処理・加
工がなされていた。<i) It must have an appropriate FJ friction coefficient for the threaded material and have so-called grip, that is, it should not cause the threaded material to slip. ■ It must be able to apply a preset tension to the threaded material in 6-touch material. It must have the function of preventing meandering of the threaded material ■ It is easy to process and there is little occurrence of deformation, wear, local wear, etc. over a long period of time (11) Rust, abrasion, scratches, etc. No surface flaws such as indentations should occur (iii) Foreign matter (oil, iron rust, and other dust) on the surface
(iv) The above functions can be maintained over a long period of time. Rubber lined rolls have traditionally been used as rolls with this function, but in recent years bridle rolls have been used. Iron rolls have come into use as demands for durability, abrasion resistance, and high tensile strength have increased.In order to satisfy the above functions, (a) the roll material is quenched and its surface polished. 911t, shot processing was performed to adjust the surface roughness to 5 to 1O-).The roll surface was subjected to treatments such as hard Cr plating.
（発明が解決しようとする課題）
しかしながら前記のｉａｌの方法によるロールは、通板
時にスリップが発生し易いうえ、焼き付現象があるため
、頻繁に生産ラインを停止させてロル表面の手入れをす
る必要があり、生産性の低下が大きいという問題がある
。(Problem to be Solved by the Invention) However, the rolls produced by the above-mentioned ial method tend to slip during sheet passing and also suffer from seizure, so the production line must be frequently stopped to clean the roll surface. However, there is a problem in that the productivity is greatly reduced.
また山）の方法によるロールは、通板材に表面疵を発生
させない点においては優れているが、■耐摩耗性が不十
分であり、寿命が短い■高温の熱履歴（３００℃以上）
を受けると、Ｃｒめっき層の硬さが低下し耐摩耗性が極
端に低下する■耐摩耗性を向上させるには、硬度を上昇
させる必要があるが、現行のＣｒめっき方法では限界が
あり、現在の硬さ（Ｉｌｖ：８５０〜１０００）以上の
ものを得ることは困難である。また仮に高硬度のものが
得られたとしても、今度はＣｒめっき層は非常に脆くな
り、剥離したＣｒめっき層の小塊によって通板材に疵が
発生するとともにめっき層全体の寿命が逆に短くなる
という問題がある。In addition, the rolls made by the method of Yama) are superior in that they do not cause surface flaws on the threaded material, but they have insufficient wear resistance and a short lifespan. High temperature thermal history (over 300°C).
When exposed to chromium, the hardness of the Cr plating layer decreases and the wear resistance is extremely reduced. ■To improve the wear resistance, it is necessary to increase the hardness, but the current Cr plating method has its limits. It is difficult to obtain a hardness higher than the current hardness (Ilv: 850-1000). In addition, even if a high hardness material is obtained, the Cr plating layer will become extremely brittle, and the peeled small lumps of the Cr plating layer will cause defects in the threaded material, and the life of the entire plating layer will be shortened. There is a problem with becoming.
このように、従来のブライドルロールはその機能を発揮
することができる寿命が短かったとともに、通板材の品
質や生産性の向上という要求を充分満足させることが出
来ないという問題を有しており、その解決が望まれてい
た。As described above, conventional bridle rolls have a short lifespan in which they can perform their functions, and they also have the problem of not being able to fully satisfy the demands of improving the quality and productivity of threaded materials. A solution was desired.
ここに、本発明の目的は、充分な長さの機能維持寿命を
有し、通板材の品質や生産性の向上環の要求を満足させ
ることができる熱間圧延鋼板用ブライドルロールを提供
することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a bridle roll for hot-rolled steel sheets that has a sufficiently long functional life and can satisfy the requirements for improving the quality and productivity of threaded materials. It is in.
（ｉ！ｌ！題を解決するための手段）
本発明者らは上記の課題を解決するため種々検討を重ね
た結果、ブライドルロールの表面に、ある特定した範囲
の気孔率と表面粗さとを有するサーメット溶射被膜、例
えば−Ｃサーメット溶射被膜を付与することにより、ブ
ライドルロールの機能維持寿命を延長することが可能に
なるとともに通板材の表面品質や生産性を向上させるこ
とが可能になることを知り、本発明を完成した。(Means for solving the i!l! problem) As a result of various studies in order to solve the above problems, the present inventors have found that the surface of the bridle roll has a porosity and surface roughness within a specified range. By applying a cermet sprayed coating, such as a -C cermet sprayed coating, it is possible to extend the functional life of the bridle roll and improve the surface quality and productivity of the threaded material. I learned this and completed the present invention.
ここに本発明は、最も広義には、気孔率２．２％以下、
表面粗さＲａ：３〜２０−に調整したサーメット溶射被
膜を備えた熱間圧延鋼板用ブライドルロールである。Here, the present invention, in the broadest sense, has a porosity of 2.2% or less,
This is a bridle roll for hot-rolled steel sheets provided with a cermet spray coating whose surface roughness Ra is adjusted to 3 to 20-.
より具体的には本発明の要旨とするところは、表面にＷ
Ｃサーメット溶射被膜を有する熱間圧延鋼板用ブライド
ルロールであって、前記被膜の気孔率は２．２％以下で
あるとともに被膜の表面粗さはＲａ：３〜２０−である
ことを特徴とする熱間圧延鋼板用ブライドルロールであ
る。More specifically, the gist of the present invention is that W on the surface
A bridle roll for hot-rolled steel sheets having a C cermet spray coating, characterized in that the porosity of the coating is 2.2% or less and the surface roughness of the coating is Ra: 3 to 20-. This is a bridle roll for hot rolled steel sheets.
また本発明の好適態様として、前記−Ｃサーメット溶射
被膜は、賀ＣとＣｏまたは旧、Ｃｒ合金との混合物から
なるＷＣのサーメットを溶射してなる被膜である。Further, as a preferred embodiment of the present invention, the -C cermet sprayed coating is a coating formed by spraying a WC cermet made of a mixture of C and Co or a former Cr alloy.
（作用） 以下本発明をその作用効果とともに詳述する。(effect) The present invention will be described in detail below along with its effects.
本発明において、ロール表面に溶射・形成するサーメッ
ト溶射被膜、例えばＫＣサーメット溶射被膜は、クロム
めっき層の硬さ（Ｉｌｖ ８５０〜１０００）より硬＜
ＩＩν１１００〜１３００程度であり、当然のことなが
ら耐摩耗性にも優れている。しかも−Ｃサーメット溶射
被膜の場合表面をミクロ的に観察すると鋭角な先端部を
有するＷＣの微粒子が林立した状態を呈しているため、
前記溶射被膜は高い摩擦係数を有し、通板材に大きな張
力を与えることが可能となりスリップ現象が発生しない
という優れた特性を有している。In the present invention, the cermet sprayed coating, such as the KC cermet sprayed coating, sprayed and formed on the roll surface is harder than the chromium plating layer (Ilv 850-1000).
IIv is about 1100 to 1300, and naturally has excellent wear resistance. Moreover, in the case of -C cermet thermal spray coating, microscopic observation of the surface reveals a forest of WC fine particles with sharp tips.
The thermal spray coating has an excellent property of having a high coefficient of friction and being able to apply a large tension to the threaded material without causing slippage.
しかし、溶射したままの被膜では表面粗さが大き過ぎる
ため、通板材にスリ傷や圧痕を発生させてしまう。一方
あまりにも平滑に仕上げると摩擦系数が低下し、ロール
として要求される性能を発揮させることができない。そ
のうえ、硬質のＷＣサーメット溶射被膜を平滑に研磨す
るには多大の労力と経費とを必要とし極めて不経済であ
る。However, the surface roughness of the as-sprayed coating is too large, causing scratches and impressions on the threaded material. On the other hand, if the finish is too smooth, the friction coefficient will decrease and the roll will not be able to exhibit the performance required. Moreover, polishing a hard WC cermet sprayed coating to a smooth surface requires a great deal of labor and expense, which is extremely uneconomical.
またこのサーメット溶射材料は通常セラミック大粒子、
例えば硬質のＷＣ粒子と金属との混合体であり、これを
溶射形成させた被膜をミクロ的に観察すると−Ｃ粒子の
周囲を金属粒子が包囲した組織となっている。−Ｃ粒子
は硬く塑性変形しないため、溶射時の衝突によって破壊
したりその衝突エネルギーによって既成被膜に亀裂が発
生するため、溶射被膜中に必ず気孔が形成されることと
なる。このようにして生成する気孔が多く存在すると、
被膜を構成する粒子間の結合力が相対的に弱くなり通板
材に高い張力を付加すると被膜が崩壊する原因となるの
で、気孔はなるべく少ない方がよいことはいうまでもな
い、しかし、溶射被膜の形成機構上気孔の無い被膜を形
成させることはできない。In addition, this cermet spraying material usually has ceramic large particles,
For example, it is a mixture of hard WC particles and metal, and when a coating formed by thermal spraying is observed microscopically, it has a structure in which -C particles are surrounded by metal particles. -C particles are hard and do not deform plastically, so they are destroyed by collision during thermal spraying, and cracks are generated in the existing coating due to the impact energy, so pores are inevitably formed in the thermal sprayed coating. If there are many pores generated in this way,
It goes without saying that it is better to have as few pores as possible, since the bonding force between the particles that make up the coating is relatively weak and applying high tension to the threaded material will cause the coating to collapse. Due to the formation mechanism, it is not possible to form a film without pores.
かくして、本発明にあって、目的とするロール用溶射被
膜においては適度な表面粗さと、溶射粒子の結合力を損
なわない範囲の気孔率とを保持することが有効である。Thus, in the present invention, it is effective to maintain an appropriate surface roughness and a porosity within a range that does not impair the bonding strength of the sprayed particles in the target thermal sprayed coating for rolls.
そこで本発明者らは、）ＩＣのサーメット被膜の表面粗
さおよび気孔率の適正な範囲を求めるために実験を行い
、気孔率は２．２％以下であること、さらに表面粗さは
Ｒａ：３〜２０／ｍｌであることが望ましいことを知見
したのである。すなわち気孔率が２．２％を越えると、
前述したように溶射粒子の結合力が低下するために３ケ
月程度の使用により被膜の剥離が発生してしまうのであ
る。また表面粗さが２０／ｊｌＮを越えると通板材の表
面に疵を発生し、一方３−未満ではスリップを発生しブ
ライドルロールとして使用することができない。Therefore, the present inventors conducted an experiment to determine the appropriate range of surface roughness and porosity of the cermet coating for ICs, and found that the porosity was 2.2% or less, and that the surface roughness was Ra: They found that it is desirable to have a concentration of 3 to 20/ml. In other words, when the porosity exceeds 2.2%,
As mentioned above, the bonding strength of the thermal spray particles decreases, and the coating peels off after about three months of use. Moreover, if the surface roughness exceeds 20/jlN, scratches will occur on the surface of the threaded material, while if it is less than 3-, slip will occur and the material cannot be used as a bridle roll.
溶射方法は、後述するように、公知のガス燃焼炎溶射法
でもプラズマ溶射法でもよく、特に制限を要するもので
はない。As described later, the thermal spraying method may be a known gas combustion flame spraying method or a plasma spraying method, and is not particularly limited.
さらにＷＣサーメントの組成も特に制限するものではな
く、後述する実施例で示した札−ＣＯおよびＷＣ−Ｃｒ
−Ｎｉ系材料等が例示される。Furthermore, the composition of the WC cerment is not particularly limited, and the compositions of the WC-CO and WC-Cr shown in the examples described later.
-Ni-based materials are exemplified.
ところで、−０粒子は２８００℃前後の高融点を有し、
同時にはなはだしく酸化され易い性質を有しているため
、それ単独では溶射被膜化することは容易ではない。そ
のため、訂粒子にＣ０５Ｃｒ−Ｎｉ合金を混在させるこ
とによって、これらの金属がＷＣ粒子問および−Ｃ粒子
−母材間のバインダーとなって結合力を発揮し、本発明
に示す特性を備えた被膜を形成するのである。By the way, -0 particles have a high melting point of around 2800°C,
At the same time, since it has the property of being extremely easily oxidized, it is not easy to form it into a thermal spray coating by itself. Therefore, by mixing the C05Cr-Ni alloy in the grains, these metals act as binders between the WC grains and between the -C grains and the base material, exerting bonding strength, and create a coating with the characteristics shown in the present invention. It forms.
さらに本発明にかかる熱間圧延鋼板用ブライドルロール
を実施例によって詳細に説明する。なお、以下に示す実
施例は本発明の例示であり、これにより本発明が不当に
制限されるものではない。Further, the bridle roll for hot rolled steel plate according to the present invention will be explained in detail by way of examples. Note that the examples shown below are illustrative of the present invention, and the present invention is not unduly limited thereby.
（実施例）
本実施例では、通板材として一般構造用鋼板ＪＩＳ Ｇ
３］０１（１９７６）ＳＳ４１を用い、種々の気孔率
、表面粗さに圃整したＷＣサーメット溶射被膜を形成し
たロールにより通板を行い、この時の通板材表面に発生
するキズ、スリップ現象の有無及び摩耗、剥離などによ
る損傷発生の有無等について調査した。(Example) In this example, general structural steel plate JIS G was used as the threading material.
3] 01 (1976) Using SS41, the sheet was threaded with a roll coated with a WC cermet sprayed coating with various porosity and surface roughness. The presence or absence of damage due to wear, peeling, etc. was investigated.
本例にあって、溶射被膜の表面粗さは通常の研磨方法、
すなわち人造ダイヤモンド砥石による研削とラップ仕上
方法によって調整した。また被膜中の気孔率は次のよう
な実験によって制御できることを確認し、溶射被膜を形
成させた。In this example, the surface roughness of the thermally sprayed coating was determined using the normal polishing method.
That is, it was adjusted by grinding with an artificial diamond grindstone and lapping finishing method. We also confirmed that the porosity in the coating could be controlled through the following experiment, and formed a sprayed coating.
＋１１燃焼ガス炎を熱源とする溶射法の場合例えば、ア
セチレンガスと酸素との燃焼ガスを用いて形成さ一已る
溶射被膜中の気孔率は、溶射ガスへ供給する燃料ガスと
酸素ガスとの圧力を変化させることによって変化させた
。すなわち燃料ガスの圧力を増すほど燃焼ガス圧力が増
加し、その中へ投入された溶射材ｒ（粒子はガス流によ
って加速され、被処理体への強い衝撃力を伴って被膜を
形成する。この溶射粒子の加速、衝突力が被膜の気孔率
とある程度比例関係にあることを利用したものである。+11 In the case of a thermal spraying method using a combustion gas flame as a heat source, for example, the porosity of a thermally sprayed coating formed using a combustion gas of acetylene gas and oxygen is determined by the ratio of the fuel gas and oxygen gas supplied to the thermal spraying gas. It was changed by changing the pressure. In other words, as the pressure of the fuel gas increases, the pressure of the combustion gas increases, and the particles of the thermal spray material (r) thrown into it are accelerated by the gas flow and form a film with a strong impact force on the object to be treated. This method takes advantage of the fact that the acceleration and collision force of sprayed particles are proportional to the porosity of the coating to some extent.
第１図は本例における一連の実験で得られた燃料ガス圧
力と被膜中の気孔率との関係を示すグラフであり、燃料
ガスの供給圧力が高いほど気孔率の低い緻密な被膜が得
られていることが分かる。Figure 1 is a graph showing the relationship between the fuel gas pressure and the porosity in the coating obtained in a series of experiments in this example, and shows that the higher the fuel gas supply pressure, the more dense the coating with lower porosity. I can see that
（２）プラズマジェットを熱源とする溶射法の場合プラ
ズマジェットを熱源とする溶射法によって得られる被膜
中の気孔率は、溶射ガンの電気出力を変化させることに
よっても制御できるが、本例では出力を一定とし、溶射
ガンと被処理体との距離を変化さゼることによって制御
した。この場合には、−Ｓに最適距離（１００〜１５０
１１！１）より長くなるほど被膜中の気孔率が大きくな
った。なお、本例における被膜中の気孔率は、被膜の断
面を光学顕微鏡により観察記録し、気孔部の面積を求め
ることにより求めた。(2) In the case of thermal spraying using a plasma jet as a heat source The porosity of the coating obtained by thermal spraying using a plasma jet as a heat source can also be controlled by changing the electrical output of the thermal spray gun, but in this example, the output was kept constant and controlled by varying the distance between the thermal spray gun and the object to be treated. In this case, -S is the optimal distance (100 to 150
11!1) The longer the length, the greater the porosity in the film. The porosity in the film in this example was determined by observing and recording the cross section of the film using an optical microscope and determining the area of the pores.
第２図は、この実施例で用いた圧延ラインの概要を示し
たものである。即ち、ラインに供される鋼板は図外に設
けられているりコイルから、ミル入側に設けられたテン
ションブライドルロール１．２．３．４を経て、ミルの
ワークロール５によって所定の厚さに圧延された後、出
側のテンションブライドルロール６．７．８．９を経て
図外に設けられている巻取機で巻取られる。なお、符号
１０はバックアップロールを示す。FIG. 2 shows an outline of the rolling line used in this example. That is, the steel plate to be supplied to the line is passed from a coil (not shown) to a tension bridle roll 1.2.3.4 provided on the input side of the mill, and then is rolled to a predetermined thickness by the work roll 5 of the mill. After being rolled, it passes through tension bridle rolls 6.7.8.9 on the exit side and is wound up by a winding machine not shown. Note that the reference numeral 10 indicates a backup roll.
本実施例では、ミル出入口のテンションブライドルロー
ル８本に前記条件の札す−メッｔ−ｉ射被膜を１５０ｐ
の厚さで形成して得たブライドルロールを使用した。In this example, 8 tension bridle rolls at the entrance/exit of the mill were coated with 150 p of the above-mentioned conditions.
A bridle roll formed to a thickness of
札サーメット材料として次の組成のものを使用した。な
お、第１表におけるサーメット組成の欄中の数字は下記
内容である。A cermet material with the following composition was used. Note that the numbers in the cermet composition column in Table 1 are as follows.
■−Ｃ（８８％）−Ｃｏ （１２％）■ＷＣ（８３％
） −Ｃｏ （１７％）■−Ｃ（７３％） −Ｃｒ
（２０％） −Ｎｉ （７％）また、比較例として
、
■ロール表面を平滑に加工後、ショツトブラストにより
５〜１０５に処理したもの。■-C (88%) -Co (12%) ■WC (83%
) -Co (17%) -C (73%) -Cr
(20%) -Ni (7%) Also, as a comparative example, (1) The roll surface was smoothed and then treated by shot blasting to a size of 5 to 105.
■硬質クロムめっき（１００ｐｍ）後、ショツトブラス
トにより５〜１０Ｓに処理したもの。■ After hard chrome plating (100 pm), shot blasting was applied to 5-10S.
■アンダーコートとして、Ｎｉ−Ｃｒ合金５０μ溶射後
、その上にアルミナを２００４溶射したもので、表面粗
さは５〜１０Ｓに調整したもの。(2) As an undercoat, Ni-Cr alloy was thermally sprayed with 50 μm, and then alumina 2004 was thermally sprayed thereon, and the surface roughness was adjusted to 5 to 10S.
なお、上述の■、■のジョンドプラストによるロール表
面の粗さは、１０５以上に調整することは困難であった
。In addition, it was difficult to adjust the roughness of the roll surface by John de Plast in the above-mentioned (1) and (2) to 105 or more.
第１表は実施例の結果を示した表であり、本発明にかか
るブライドルロール、すなわら被ＩＩＩの気孔率が２．
２％以下であって表面粗さがＲａ：３〜２０ｕｎのＷＣ
サーメット溶射被膜を有するロールは通板材にキズを発
生させることなく、また被膜の剥離もなく、１年以上の
使用に耐えた。Table 1 is a table showing the results of Examples, and shows that the porosity of the bridle roll according to the present invention, that is, the material III was 2.
WC with a surface roughness of 2% or less and a surface roughness of Ra: 3-20un
The roll with the cermet thermal spray coating endured use for more than one year without causing any scratches on the threaded material or peeling of the coating.
一方、単に気孔率が高いだけの被膜は、３か月で剥離現
象が認められ（試料寛１０．１１．１２）、気孔率が低
くても表面粗さの小さい被膜はスリップ現象が見られた
（試料患７）。On the other hand, coatings with simply high porosity showed a peeling phenomenon after 3 months (Sample Kan 10, 11, 12), and coatings with low porosity but with small surface roughness showed slippage. (Sample patient 7).
さらに、例えばロールにショツトブラストしたものは３
か月の使用でブラストによる凹凸が摩耗し°ζスリップ
を発生し、板への焼付現象が発生しく試料１ｋ１３）
、硬質クロムめっき被膜は４か月の使用でめっき層が剥
乱しく試料１ｔ１４） 、アルミナを溶射したものは５
か月の使用で剥離したく試料隘】５）。Furthermore, for example, those shot blasted into rolls are 3
After months of use, the unevenness caused by the blasting wears out, causing slippage and a seizure phenomenon on the plate (sample 1k13).
, The hard chrome plating film showed that the plating layer was peeling after 4 months of use, and the sample was 1t14), and the one coated with alumina was 5
Samples may peel off after months of use] 5).
第３図は、本発明にかかるＷＣサーメット溶射被膜の気
孔率と表面粗さの関係を表わしたグラフであり、実施例
の結果を要約したものである。図中、白丸の中の番号は
第１表の試料隔を示し、斜線領域はロール寿命が１年以
上の領域を表わす。FIG. 3 is a graph showing the relationship between the porosity and surface roughness of the WC cermet sprayed coating according to the present invention, and summarizes the results of Examples. In the figure, the numbers in white circles indicate the sample intervals in Table 1, and the shaded areas indicate areas where the roll life is one year or more.
第３図より本発明にかかるロールの被膜は気孔率 ２
８２％以下
表面粗さ ］ン８３〜２０／Ｊｌ
の範囲内にあることが有効であることが明らかである。From FIG. 3, the coating of the roll according to the present invention has a porosity of 2.
It is clear that it is effective to have a surface roughness of 82% or less within the range of 83 to 20/Jl.
気孔率が少なくても平滑であれば通板材がスリップし、
表面粗さが大であればキズを発生させる。Even if the porosity is low, if it is smooth, the threaded material will slip,
If the surface roughness is large, scratches will occur.
また、気孔率が高ければ、被膜の−６粒子の結合力が低
く剥離する欠点がある。Furthermore, if the porosity is high, the bonding strength of the -6 particles in the coating is low and there is a drawback that the coating may peel off.
また、本実施例より、溶射材料の成分及び溶射熱源の種
類には本発明の作用効果は関係なく、被膜の気孔率及び
その表面粗さのみを制御すれば所望の性能を有するｔｉ
ｃの被膜が得られることが明らかである。Moreover, from this example, the effects of the present invention are not related to the components of the thermal spraying material and the type of thermal spraying heat source, and the desired performance can be achieved by controlling only the porosity of the coating and its surface roughness.
It is clear that a coating of c.
（発明の効果）
以上詳述してきたように気孔率を２．２％以下のＷＣサ
ーメッ日容射被膜の表面をＲａ：３〜２０ｐの粗さに調
整した本発明にかかるブライドルロールによれば、熱間
圧延鋼板の精製工程において、テンションブライドルロ
ールとして鋼板をスリップさせずまたスリ疵を発生させ
ず、適度な張力を与えつつ長期間使用でき、高品質の鋼
板を効率よく生産することができるのである。(Effects of the Invention) As detailed above, according to the bridle roll of the present invention, the surface of the WC thermet solar radiation coating with a porosity of 2.2% or less is adjusted to a roughness of Ra: 3 to 20p. In the refining process of hot-rolled steel plates, the tension bridle roll does not cause the steel plate to slip or cause scratches, and can be used for a long period of time while applying appropriate tension, and can efficiently produce high-quality steel plates. It is.
かかる効果を有する本発明の実用上の意義は著しい。The practical significance of the present invention having such effects is remarkable.
第１図は、溶射熱源用燃料ガスの溶射ガンへの供給圧力
と、その燃焼ガスによって形成された被膜中の気孔率と
の関係を示すグラフ：
第２図は、実施例で用いたー最構造用鋼板の生産ライン
の概略図；および
第３図は、ＷＣサーメット溶射被＋１９の気孔率と表面
仕」二げ粗さとの関係を示すグラフであり、図中の■〜
＠は第１表の試料番号に対応するものである。
１．２．３．４ ： ミル入側テンションブライドル
ロール５ ： ワークロール
６．７，８．９ ： ミル出側テンションブライドル
ロールｌＯ：バンクアノブロール
本２国
尾３凹
出願人 トーカ口株式会社（外１名）Figure 1 is a graph showing the relationship between the supply pressure of the fuel gas for the thermal spray heat source to the thermal spray gun and the porosity in the coating formed by the combustion gas. A schematic diagram of a production line for structural steel sheets; and Figure 3 are graphs showing the relationship between porosity and surface finish roughness of WC cermet thermal spray coating +19, and
@ corresponds to the sample number in Table 1. 1.2.3.4: Mill entry tension bridle roll 5: Work roll 6.7, 8.9: Mill exit tension bridle roll lO: Bankano Roll Book 2 Kunio 3 Concave Applicant Tokaguchi Co., Ltd. (1 other person)
Claims (2)
鋼板用ブライドルロールであって、前記被膜の気孔率は
２．２％以下であるとともに被膜の表面粗さはＲａ：３
〜２０μｍであることを特徴とする熱間圧延鋼板用ブラ
イドルロール。(1) A bridle roll for hot-rolled steel sheets having a WC cermet spray coating on the surface, wherein the porosity of the coating is 2.2% or less and the surface roughness of the coating is Ra: 3.
A bridle roll for hot-rolled steel sheets, characterized in that the diameter is ~20 μm.
はＮｉ、Ｃｒ合金との混合物からなるＷＣのサーメット
を溶射してなる被膜である請求項（１）記載の熱間圧延
鋼板用ブライドルロール。(2) The bridle roll for a hot-rolled steel sheet according to claim 1, wherein the WC cermet sprayed coating is a coating formed by spraying a WC cermet made of a mixture of WC and Co or a Ni, Cr alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP828289A JPH02187206A (en) | 1989-01-17 | 1989-01-17 | Bridle roll for hot rolled steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP828289A JPH02187206A (en) | 1989-01-17 | 1989-01-17 | Bridle roll for hot rolled steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02187206A true JPH02187206A (en) | 1990-07-23 |
Family
ID=11688827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP828289A Expired - Lifetime JPH02187206A (en) | 1989-01-17 | 1989-01-17 | Bridle roll for hot rolled steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02187206A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0528506U (en) * | 1991-09-26 | 1993-04-16 | 昭和アルミニウム株式会社 | Rolling machine for aluminum foil |
| JP2018087385A (en) * | 2016-11-17 | 2018-06-07 | Ｊｆｅスチール株式会社 | Steel plate passing method, thin steel plate manufacturing facility, and steel plate manufacturing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6087910A (en) * | 1983-10-21 | 1985-05-17 | Kawasaki Steel Corp | Roll for rolling |
| JPS60102222A (en) * | 1983-11-10 | 1985-06-06 | Kawasaki Steel Corp | Ceramic thermal spray roll for cold rolling process |
| JPS63313607A (en) * | 1987-06-16 | 1988-12-21 | Kawasaki Steel Corp | Tension bridle roll |
| JPH01233002A (en) * | 1988-03-15 | 1989-09-18 | Nkk Corp | Surface working method for bridle roll |
| JPH0537724A (en) * | 1991-07-26 | 1993-02-12 | Canon Inc | Color picture reader |
-
1989
- 1989-01-17 JP JP828289A patent/JPH02187206A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6087910A (en) * | 1983-10-21 | 1985-05-17 | Kawasaki Steel Corp | Roll for rolling |
| JPS60102222A (en) * | 1983-11-10 | 1985-06-06 | Kawasaki Steel Corp | Ceramic thermal spray roll for cold rolling process |
| JPS63313607A (en) * | 1987-06-16 | 1988-12-21 | Kawasaki Steel Corp | Tension bridle roll |
| JPH01233002A (en) * | 1988-03-15 | 1989-09-18 | Nkk Corp | Surface working method for bridle roll |
| JPH0537724A (en) * | 1991-07-26 | 1993-02-12 | Canon Inc | Color picture reader |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0528506U (en) * | 1991-09-26 | 1993-04-16 | 昭和アルミニウム株式会社 | Rolling machine for aluminum foil |
| JP2018087385A (en) * | 2016-11-17 | 2018-06-07 | Ｊｆｅスチール株式会社 | Steel plate passing method, thin steel plate manufacturing facility, and steel plate manufacturing method |
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