JPH0755324B2 - Chrome-plated work roll for cold rolling or temper rolling - Google Patents
Chrome-plated work roll for cold rolling or temper rollingInfo
- Publication number
- JPH0755324B2 JPH0755324B2 JP60041011A JP4101185A JPH0755324B2 JP H0755324 B2 JPH0755324 B2 JP H0755324B2 JP 60041011 A JP60041011 A JP 60041011A JP 4101185 A JP4101185 A JP 4101185A JP H0755324 B2 JPH0755324 B2 JP H0755324B2
- Authority
- JP
- Japan
- Prior art keywords
- roll
- chrome
- rolling
- roughness
- plating
- 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 - Fee Related
Links
- 238000005096 rolling process Methods 0.000 title claims description 14
- 238000005097 cold rolling Methods 0.000 title claims description 6
- 238000007747 plating Methods 0.000 claims description 42
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 13
- 239000000463 material Substances 0.000 description 10
- 230000003746 surface roughness Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 この発明は、冷間圧延又は調質圧延において使用するク
ロムメツキワークロールに関するもので、圧延における
ロール寿命の延長を目的とする。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a chrome plated work roll used in cold rolling or temper rolling, and an object thereof is to extend the roll life in rolling.
〈発明の背景〉 圧延用ワークロールは、被圧延材の量が増加するに従
い、ロール表面の粗度低下（摩耗）が進み、最終的には
被圧延材の粗度が確保出来なくなるか、あるいは所定の
圧下率で安定した圧延が困難になるかのいずれかにより
ロール寿命となる。<Background of the Invention> In the work roll for rolling, as the amount of the material to be rolled increases, the roughness of the roll surface decreases (wear), and eventually the roughness of the material to be rolled cannot be secured, or The roll life is reached when either stable rolling becomes difficult at a predetermined rolling reduction.
冷延鋼板の調質圧延を例にとると、被圧延材の表面粗度
（ダル鋼板でRa＝30〜70μinch）を確保する為にロール
寿命は調質圧延距離80Km程度に規制されている。Taking temper rolling of a cold rolled steel sheet as an example, the roll life is regulated to a temper rolling distance of about 80 Km in order to secure the surface roughness of the material to be rolled (Ra = 30 to 70 µinch in a dull steel sheet).
又、ロール表面にクロムメツキを行なうクロムメツキワ
ークロールも、一部のロールに対してはロール寿命の延
長効果は認められるものの、各種のロール表面粗度のロ
ール全体に対して効果をあげるに至つていない。In addition, a chrome plating work roll that performs chrome plating on the roll surface has an effect of extending the roll life for some rolls, but has an effect on all rolls of various roll surface roughness. Not not.
このロール寿命が短い事により、ロール組替による圧延
機稼働率の低下及びロール研摩、ロールダル加工の増加
等をまねいているのが現状である。Due to the short roll life, it is the current situation that the rolling mill operation rate is lowered and the roll polishing and roll dull processing are increased by changing the rolls.
〈発明の概要〉 本発明は上記した問題点を解決するためになされたもの
で、冷間圧延又は調質圧延用ワークロールにおいて、最
適クロムメツキ厚の範囲をロール粗度との関係で限定す
る事により広範囲の表面粗度ロールに対してクロムメツ
キにより大幅なロール寿命延長を達成せんとするもので
ある。<Outline of the Invention> The present invention has been made to solve the above-mentioned problems, and in a work roll for cold rolling or temper rolling, to limit the range of the optimum chromium plating thickness in relation to the roll roughness. Therefore, a wide range of surface roughness rolls will be achieved by chrome plating, which will significantly extend roll life.
本発明者らは冷間圧延又は調質圧延用クロムメツキワー
クロール（但し下地がNiメツキされたクロムメツキワー
クロールの場合を除く）におけるメツキ厚とロール粗度
及びロール寿命の関係につき、種々実験研究を重ねた結
果、次のような知見を得た。The present inventors conducted various experiments on the relationship between the plating thickness, roll roughness, and roll life in a chrome-plated work roll for cold rolling or temper rolling (excluding the case of a chrome-plated work roll whose base is Ni-plated). As a result of repeated research, the following findings were obtained.
即ち、クロムメツキロールでは、メツキ厚が薄すぎると
表面粗度摩耗が早期にメツキ厚を越え、ロール母材に達
する為、ロール寿命延長効果が小さい。このため、最適
メツキ厚の下限値が存在するが、この値はロール母材粗
度により変化する。ロール粗度が高い場合は、主に一部
の粗度ピークの高い部分のみで被圧延材と接触する為、
厚いメツキ厚を必要とし、逆にロール粗度の低い場合は
それほど厚いメツキ厚を必要としない。That is, in the chrome plated roll, if the plated thickness is too thin, the surface roughness wear exceeds the plated thickness early and reaches the roll base material, so the roll life extension effect is small. Therefore, there is a lower limit of the optimum plating thickness, but this value changes depending on the roughness of the roll base material. When the roll roughness is high, it mainly comes into contact with the material to be rolled only in the part where the roughness peak is high,
A thick plating thickness is required, and conversely, when the roll roughness is low, a thick plating thickness is not required.
一方、メツキ厚が厚すぎると、メツキ後のロール表面粗
度がメツキ前のロール表面粗度に対して大きく変化する
欠点があるばかりで無く、圧延時の被圧延材とロール表
面の間に発生する摩擦力をメツキ面のみで受ける為、ロ
ール母材粗度は変化せず、メツキ表層のみが平滑化さ
れ、大幅な寿命延長を達成出来ない。On the other hand, if the plating thickness is too thick, there is not only the drawback that the roll surface roughness after plating changes significantly with respect to the roll surface roughness before plating, but it also occurs between the material to be rolled and the roll surface during rolling. Since the frictional force is applied only to the matte surface, the roughness of the roll base material does not change, only the matte surface layer is smoothed, and the life cannot be significantly extended.
したがつて、最適メツキ厚には上限が存在する事になる
が、メツキ厚が厚すぎるとメツキ表層のみが平滑化する
事から、ロール母材粗度が低い程薄いメツキを必要とす
る事になる。逆にロール母材粗度が高いと厚いメツキ厚
まで適当となるが、ある一定のメツキ厚を越えるとメツ
キ剥離が発生する。このメツキ剥離の発生するメツキ厚
はロール粗度に関係なくほぼ一定である。この為、最適
メツキ厚の上限はロール粗度の関数となると共に一定の
上限値が設定される。Therefore, there is an upper limit to the optimum plating thickness, but if the plating thickness is too thick, only the surface layer of the plating will be smoothed.Thus, the lower the roughness of the roll base material, the thinner the plating needs to be. Become. On the other hand, if the roughness of the roll base material is high, a thick plating thickness is suitable, but if it exceeds a certain fixed plating thickness, peeling of the plating occurs. The plating thickness at which the plating peeling occurs is almost constant regardless of the roll roughness. Therefore, the upper limit of the optimum plating thickness is a function of roll roughness, and a fixed upper limit is set.
第１図にロール粗度Ra＝３μｍロールでのメツキ厚とロ
ール寿命の関係を示す。このグラフからわかるように最
適メツキ厚の下限は2.5μｍ程度である。また最適メツ
キ厚の上限は14μｍである。これはメツキ厚14μｍでメ
ツキ層のみの平滑化現象が認められると共に、16μｍで
はメツキ剥離が発生する為である。FIG. 1 shows the relationship between the plating thickness and the roll life when the roll roughness Ra is 3 μm. As can be seen from this graph, the lower limit of the optimum plating thickness is about 2.5 μm. The upper limit of the optimum plating thickness is 14 μm. This is because the smoothing phenomenon of only the plating layer is observed when the plating thickness is 14 μm, and the plating peeling occurs when the plating thickness is 16 μm.
本発明者らは更に上記と同様な方法で、ロール粗度Ra＝
0.2〜５μｍの範囲のロールで試験を実施し、クロムメ
ツキにより５倍以上の寿命延長が達成されるメツキ厚範
囲を求めた。その結果を第２図に示す。このグラフから
クロムメツキ厚（ｔ）はRaとの関係において直線a,b,c
に囲まれた範囲とするのが適切であることがわかる。こ
こで直線a,b,cは下記式で表わせることがグラフから読
みとれる。The present inventors further performed roll roughness Ra =
The test was carried out with a roll in the range of 0.2 to 5 μm, and the range of the plating thickness at which the life extension of 5 times or more was achieved by the chrome plating was determined. The results are shown in FIG. From this graph, the chrome plating thickness (t) is the straight line a, b, c in relation to Ra.
It turns out that it is appropriate to set the range surrounded by. It can be read from the graph that the straight lines a, b, and c can be expressed by the following equations.
a:t＝｛５＋３・Ra（μｍ）｝μｍ c:t＝16μｍ 又、クロムメッキにより８倍以上の寿命が達成されるよ
り好ましいメッキ厚範囲を求めた。a: t = {5 + 3 ・ Ra (μm)} μm c: t = 16 μm Further, a more preferable plating thickness range in which a life of 8 times or more is achieved by chromium plating was obtained.
第２図よりクロムメッキ厚（ｔ）はRaとの関係において
直線ｅ、ｆ、ｇで囲まれた範囲とすることが適切である
ことがわかる。From FIG. 2, it can be seen that it is appropriate to set the chromium plating thickness (t) within the range surrounded by the straight lines e, f and g in relation to Ra.
ここで直線ｅ、ｆ、ｇは下記式で表わせることがグラフ
から読みとれる。It can be read from the graph that the straight lines e, f, and g can be expressed by the following equations.
e:t＝５＋３・Ra（μｍ） g:t＝10μｍ したがって本発明においてより好ましいメッキ厚ｔは でかつｔ＜10μｍ となる。このメッキ厚の範囲に設定することにより、ロ
ール寿命の大幅な延長が可能となる。e: t = 5 + 3 ・ Ra (μm) g: t = 10 μm Therefore, the more preferable plating thickness t in the present invention is And t <10 μm. By setting the plating thickness within this range, the roll life can be significantly extended.
〈発明の効果〉 以上説明したように、本発明によれば、メツキ厚をロー
ル粗度との関係において限定することにより大幅なロー
ル寿命の延長が可能であり、産業上多大な効果を得るこ
とができる。<Effects of the Invention> As described above, according to the present invention, it is possible to significantly extend the roll life by limiting the plating thickness in relation to the roll roughness, and to obtain a great industrial effect. You can
第１図はクロムメツキ厚とロール寿命との関係を示すグ
ラフ、第２図は高ロール寿命を得られるクロムメツキ厚
の範囲はロール表面粗度Raとの関係で示したグラフであ
る。FIG. 1 is a graph showing the relationship between the chrome plating thickness and the roll life, and FIG. 2 is a graph showing the relationship between the chrome plating thickness and the roll surface roughness Ra for obtaining a long roll life.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−196207（ＪＰ，Ａ) 特開 昭58−73794（ＪＰ，Ａ) 特開 昭61−74715（ＪＰ，Ａ) 特開 昭63−144808（ＪＰ，Ａ) 実開 昭47−38035（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-60-196207 (JP, A) JP-A-58-73794 (JP, A) JP-A-61-74715 (JP, A) JP-A-63- 144808 (JP, A) Actually open 47-38035 (JP, U)
Claims (1)
ッキ処理のなされた冷間圧延又は調質圧延用クロムメッ
キワークロールにおいて、メッキ厚をロール粗度との関
係から下式を満足するように調整したことを特徴とする
冷間圧延又は調質圧延用クロムメッキワークロール。 但しt:メッキ厚 Ra:ロール粗度（μｍ）1. A chrome-plated work roll for cold rolling or temper rolling which has been subjected to a chrome plating treatment except when the undercoat is Ni-plated, so that the plating thickness satisfies the following formula in relation to the roll roughness. A chrome-plated work roll for cold rolling or temper rolling, which is characterized in that However, t: plating thickness Ra: roll roughness (μm)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60041011A JPH0755324B2 (en) | 1985-03-04 | 1985-03-04 | Chrome-plated work roll for cold rolling or temper rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60041011A JPH0755324B2 (en) | 1985-03-04 | 1985-03-04 | Chrome-plated work roll for cold rolling or temper rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61202708A JPS61202708A (en) | 1986-09-08 |
| JPH0755324B2 true JPH0755324B2 (en) | 1995-06-14 |
Family
ID=12596450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60041011A Expired - Fee Related JPH0755324B2 (en) | 1985-03-04 | 1985-03-04 | Chrome-plated work roll for cold rolling or temper rolling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0755324B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6349310A (en) * | 1986-08-19 | 1988-03-02 | Nippon Steel Corp | Rolling roll |
| JPH0669566B2 (en) * | 1987-10-08 | 1994-09-07 | 川崎製鉄株式会社 | Temper rolling method for steel sheet |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5141072Y2 (en) * | 1971-05-31 | 1976-10-06 | ||
| JPS5141072U (en) * | 1974-09-20 | 1976-03-26 | ||
| JPS6033908B2 (en) * | 1981-10-26 | 1985-08-06 | 新神戸電機株式会社 | Manufacturing method of matte roll |
| JPS60196207A (en) * | 1984-03-15 | 1985-10-04 | Sumitomo Metal Ind Ltd | Two-layer plated cold rolling roll |
| JPS6174715A (en) * | 1984-09-21 | 1986-04-17 | Nippon Steel Corp | Cold rolling method of metallic strip |
-
1985
- 1985-03-04 JP JP60041011A patent/JPH0755324B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61202708A (en) | 1986-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0755324B2 (en) | Chrome-plated work roll for cold rolling or temper rolling | |
| US2991544A (en) | Bright surfaced metal sheets and method of producing same | |
| JP3382874B2 (en) | Method for producing stainless steel cold rolled steel strip with high gloss | |
| RU2182191C2 (en) | Method for coating steel strip with aluminum | |
| JP2880418B2 (en) | Auxiliary roll for cold rolling mill for stainless steel and surface treatment method | |
| JP2761796B2 (en) | Crown control method in cold rolling | |
| JPS61202707A (en) | Cr metal roll for rolling | |
| US4380852A (en) | Mill roll | |
| JP3236553B2 (en) | Roll for rolling metal sheet and rolling method using the roll | |
| JPS6174715A (en) | Cold rolling method of metallic strip | |
| JP3770024B2 (en) | Manufacturing method of high gloss metal strip | |
| JP3475351B2 (en) | Cold rolling method of aluminum and aluminum alloy plate and foil | |
| JP2968551B2 (en) | Manufacturing method of amorphous alloy ribbon | |
| JP3190163B2 (en) | Stainless steel plate excellent in buffing property and method for producing the same | |
| JP3398625B2 (en) | Cold tandem rolling mill and cold rolling method for metal sheet | |
| Gaidabura et al. | Power of Deformation During Rolling in Conical Rolls | |
| JPH0471701A (en) | Method for imparting gloss on surface of metallic sheet | |
| JP2726579B2 (en) | Manufacturing method of high gloss metal plate | |
| JPS5736041A (en) | SOROORUSHIKIKINZOKUSUOBISEIZOSOCHI | |
| JP2655988B2 (en) | Work roll surface care equipment for rolling mills | |
| JPH0773728B2 (en) | Rolling work roll surface care device and method of using the same | |
| Shutang et al. | Study of Flatness While Rolling Ultra-Thin Foils | |
| Mukhin | An Investigation of the Causes of the Formation of" Rolled in Scale" Defect at the Surface of Automobile Sheet | |
| JPH0722773B2 (en) | Surface processing method of roll for transporting metal strip having ceramic coating | |
| Messien et al. | Ferritic rolling of thin hot strips |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |