JPH03234307A - Manufacture of dull roll - Google Patents
Manufacture of dull rollInfo
- Publication number
- JPH03234307A JPH03234307A JP2728490A JP2728490A JPH03234307A JP H03234307 A JPH03234307 A JP H03234307A JP 2728490 A JP2728490 A JP 2728490A JP 2728490 A JP2728490 A JP 2728490A JP H03234307 A JPH03234307 A JP H03234307A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- dull
- plating
- plated
- solid solution
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000007747 plating Methods 0.000 claims abstract description 18
- 239000006104 solid solution Substances 0.000 claims abstract description 10
- 238000013532 laser treatment Methods 0.000 claims abstract description 5
- 238000007711 solidification Methods 0.000 claims abstract description 3
- 230000008023 solidification Effects 0.000 claims abstract description 3
- 239000002244 precipitate Substances 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 238000009760 electrical discharge machining Methods 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 238000005097 cold rolling Methods 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 6
- 230000008018 melting Effects 0.000 abstract description 6
- 238000003754 machining Methods 0.000 abstract description 3
- 238000010422 painting Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- 239000010410 layer Substances 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910001240 Maraging steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000011282 treatment 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
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】
(産業上の利用分野)
本発明は耐久性の優れた鋼板の冷間圧延用ダルロールに
関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a dull roll for cold rolling steel sheets having excellent durability.
(従来の技術)
鋼板の冷間圧延用ダルロールの製造法にはロール表面を
、ショツトブラスト、放電加工あるいは最近ではレーザ
照射による方法がある。これらの方法によりつくられる
ロールは、通常のロールよりも表面粗さが大きいために
、突起高さの低下が早く寿命が短い。ショツトブラスト
法では加工硬化により、また、放電加工とレーザ照射で
は極表面の急熱急冷にともなう焼入れにより表面の硬さ
を高めて長寿命化を計っている。しかし、圧延における
摩擦条件は平均面圧でも100kg/−を越え、かつ、
すべりを伴う苛酷なものであるので、ブライドロールに
比べて突起部に局部的高面圧が作用するダルロールの寿
命は他ロールの2分の1以下である。(Prior Art) Methods for manufacturing dull rolls for cold rolling steel sheets include methods for treating the roll surface with shot blasting, electrical discharge machining, or recently, laser irradiation. Rolls made by these methods have a larger surface roughness than normal rolls, so the height of the protrusions decreases more quickly and their lifespan is shorter. In the shot blasting method, work hardening is used, and in electric discharge machining and laser irradiation, the extreme surface is rapidly heated and cooled to increase surface hardness and extend life. However, the friction conditions during rolling are such that even the average surface pressure exceeds 100 kg/-, and
Since the rolls are harsh and involve slipping, the lifespan of dull rolls is less than half that of other rolls, as the protrusions are subject to higher local surface pressure than bride rolls.
ダルロールの製造法に関する従来技術は、例えば特公昭
60−2156号公報(レーザ光を利用したロール粗面
化装置)があるが、突起の耐久性向上方法については触
れられていない。A prior art related to a method for manufacturing dull rolls is, for example, Japanese Patent Publication No. 60-2156 (roll roughening device using laser light), but it does not mention a method for improving the durability of protrusions.
(発明が解決しようとする課題)
本発明は、従来の冷間圧延用ダルロールに比し、格段に
耐摩耗性の優れた表面ダルロールを提供することを目的
とする。(Problems to be Solved by the Invention) An object of the present invention is to provide a surface dull roll that has much better wear resistance than conventional dull rolls for cold rolling.
(課題を解決するための手段)
上記目的を達成するため本発明の要旨とするところは下
記のとおりである。(Means for Solving the Problems) The gist of the present invention to achieve the above object is as follows.
1、ロール表面に予め、高温の溶融状態では固溶し、凝
固後析出あるいは固溶硬化する元素をメッキした後、レ
ーザ処理、または放電加工することを特徴とする表面ダ
ルロールの製造法。1. A method for manufacturing a surface dull roll, which comprises plating the roll surface with an element that dissolves in solid solution in a high-temperature molten state and precipitates or hardens in solid solution after solidification, and then performs laser treatment or electrical discharge machining.
2、メッキ元素を、Cr、Mo、Ni、Ag。2. Plating elements are Cr, Mo, Ni, and Ag.
TI 、 W、 V、 Nbの1種または2種以上とす
ることを特徴とする請求項1記載のダルロールの製造法
。The method for producing dull rolls according to claim 1, characterized in that one or more of TI, W, V, and Nb are used.
3、メッキ層の厚さが必要とするダル突起高さの10分
の1ないし1倍であることを特徴とする請求項1記載の
ダルロール製造法。3. The dull roll manufacturing method according to claim 1, wherein the thickness of the plating layer is 1/10 to 1 times the required height of the dull protrusions.
本発明者らは、圧延ロールの摩耗がシミュレートできる
摩耗試験機を用いて、レーザダルロール突起部の摩耗が
どのように進行するかを観察した。The present inventors used an abrasion tester that can simulate the abrasion of a rolling roll to observe how the abrasion of the laser dull roll protrusion progresses.
その結果、次のことがわかった。突起部は、レーザビー
ムにより溶融し、同時にアシストガス吹き付けによりク
レータのように周辺がちりあがった後、母材に熱を奪わ
れて急速凝固することにより生成するために、通常の鋼
では合金元素が過飽和に固溶した金属組織を有している
。溶融層は極表面であり、母材に比して熱容量が小さい
のでその冷却速度はきわめて大きい。そのために、現用
のロール材質(1vt%C−3vt%Cr、鍛鋼)では
組織の種類として残留オーステナイトになっており硬さ
が低い。すなわち、レーザ照射した場合の溶融層のビッ
カース硬さは700前後であり、母材に比べて100な
いし200低い。そのために、折角つけた突起が摩耗試
験の過程において塑性変形、あるいは摩耗により脱落し
て少ない摩擦回数で消失してしまう。As a result, we found the following. In normal steel, the protrusions are formed by melting by the laser beam, and at the same time, the surrounding area is lifted up like a crater by the blowing of assist gas, and then the base metal absorbs heat and solidifies rapidly. has a supersaturated solid solution metal structure. The molten layer is on the extreme surface and has a smaller heat capacity than the base material, so its cooling rate is extremely high. For this reason, the current roll material (1vt%C-3vt%Cr, forged steel) has a retained austenite structure and has low hardness. That is, the Vickers hardness of the molten layer when laser irradiated is around 700, which is 100 to 200 lower than that of the base material. For this reason, the protrusions that have been carefully built fall off due to plastic deformation or wear during the wear test process, and disappear after a small number of frictions.
ところが本発明者らは母材の材質を、高速度工具鋼系、
マレージング鋼系などの析出硬化する材質に変えて同様
な実験をした結果、合金元素が過飽和に固溶した溶融層
が母材より硬化し、耐久性が向上することを見いだした
。このとき、多重ビーム法などにより焼戻し過程を設け
、過飽和に固溶した合金元素の析出を促進することが好
ましい。However, the present inventors changed the material of the base material to high-speed tool steel,
As a result of conducting similar experiments using a material that undergoes precipitation hardening, such as maraging steel, it was discovered that the molten layer in which the alloying elements were supersaturated in solid solution became harder than the base material, improving durability. At this time, it is preferable to provide a tempering process using a multiple beam method or the like to promote precipitation of supersaturated solid solution alloy elements.
これらのことから、溶融層にさらに合金元素を富化せし
めるためにレーザ処理の前にメッキを施すことを着想し
た。粗さの小さいブライドロールにはクロムメッキ法が
既に実用化されている。ダルロールの場合に摩耗が著し
いのは突起部であるが、突起部が上記方法により、また
平坦部がクロムメッキにより摩耗が減少すればダルロー
ルの耐久性が甚だしく向上することになる。また、母材
を高合金にするよりも表面のみに元素添加する方が経済
的でもある。Based on these facts, we came up with the idea of applying plating before laser treatment in order to further enrich the molten layer with alloying elements. Chrome plating has already been put into practical use for bride rolls with small roughness. In the case of a dull roll, the protrusions are subject to significant wear, but if the protrusions are reduced by the above method and the flat parts are plated with chrome, the durability of the dull roll will be greatly improved. Furthermore, it is more economical to add elements only to the surface than to make the base material a high alloy.
なお、メッキ後の溶融処理としてはレーザ照射の他に放
電加工でも同様である。Note that as the melting treatment after plating, electric discharge machining may be used in addition to laser irradiation.
次に、メッキする元素の種類はCrの他にMo。Next, the types of elements to be plated are Mo in addition to Cr.
Ni 、AfI、TI 、V、Nb 、Wなどがあり、
いずれも析出効果、あるいは固溶効果作用をする元素で
ある。これらの合金元素による析出物は、炭化物(Cr
t C3、MO2C,W2 Cなど)および金属間化合
物(Ni、Mo、Fe2 Mo。There are Ni, AfI, TI, V, Nb, W, etc.
All of them are elements that have a precipitation effect or a solid solution effect. Precipitates caused by these alloying elements are carbides (Cr
tC3, MO2C, W2C, etc.) and intermetallic compounds (Ni, Mo, Fe2Mo.
Ti、Al1など)である。Ti, Al1, etc.).
メッキ層の厚さは、溶融後に生じる突起高さによって決
まる。突起高さは経験的にほぼ溶融深さと同レベルであ
る。従って、メッキ層厚さは溶融深さより薄くなければ
ならない。何となれば、母材と混合し、母材との密着性
を確保する必要があるからである。メッキ層厚さが突起
高さと同じであれば母材の混合はわずかであり、メッキ
層厚さが突起高さよりはるかに薄ければメッキ金属の混
合がわずかになり硬化の程度が小さい。この混合比が母
材の材質とともに、突起部の硬さ、母材との密着性など
の特性を決めるので、利用する析出物の種類に応じて最
適メッキ厚さが決まるはずである。しかし、ダルロール
に要求される突起高さは最大でもLots程度であり、
通常1坤より薄いメッキは行われず効果が少ないことか
ら下限を突起高さのIO分の1とした。上限は上記のこ
とから突起高さの1倍となる。The thickness of the plating layer is determined by the height of the protrusions produced after melting. Empirically, the protrusion height is approximately at the same level as the melting depth. Therefore, the plating layer thickness must be thinner than the melting depth. This is because it is necessary to mix with the base material and ensure adhesion to the base material. If the thickness of the plating layer is the same as the height of the protrusion, there will be little mixing of the base metal, and if the thickness of the plating layer is much thinner than the height of the protrusion, the mixing of the plated metal will be small and the degree of hardening will be small. This mixing ratio, along with the material of the base material, determines the hardness of the protrusion, adhesion to the base material, and other characteristics, so the optimal plating thickness should be determined depending on the type of precipitate used. However, the maximum protrusion height required for dull rolls is around Lots,
Since plating thinner than 1 kon is usually not done and has little effect, the lower limit was set to 1/IO of the protrusion height. From the above, the upper limit is 1 times the protrusion height.
これらのことを第1図、第2図に示す。第1図は適当な
厚さのメッキ後レーザ照射することにより硬化した突起
が生成することを示す図であり(a)はメッキ後の表層
断面、(b)はメッキ後の表面をレーザ照射した後の表
層を示す。第2図はダルロールの圧延中実起部が塑性変
形及び摩耗により高さが低下することを説明する走査電
子顕微鏡写真である。These matters are shown in FIGS. 1 and 2. Figure 1 shows that hardened protrusions are generated by laser irradiation after plating to an appropriate thickness. (a) is a cross section of the surface layer after plating, and (b) is the surface after plating is irradiated with laser. The later surface layer is shown. FIG. 2 is a scanning electron micrograph illustrating that the height of the rolled solid origin of the dull roll is reduced due to plastic deformation and wear.
(実 施 例)
第1表に示すA、 B、 C,3種類のダルロールを試
作し鋼板の冷間圧延を行った。(Example) Three types of dull rolls, A, B, and C shown in Table 1, were prototyped and steel plates were cold rolled.
これらロールの圧延距離と突起平均高さの関係は第3図
のとおりであった。本発明ロールの耐摩耗性は従来ロー
ルの2ないし3倍であることがわかる。なお、突起高さ
の測定方法は第3図中に示したとおりであり、中心線平
均粗さの約2倍に等しい。The relationship between the rolling distance of these rolls and the average height of the projections was as shown in FIG. It can be seen that the abrasion resistance of the roll of the present invention is two to three times that of the conventional roll. The method of measuring the protrusion height is as shown in FIG. 3, and is equal to about twice the center line average roughness.
(発明の効果)
本発明は、以上述べたように構成しかつ作用せしめるよ
うにしたから、冷間圧延のダルロールとして従来より格
段に優れた耐久性を有するロールの製造が可能となり、
良好な成形性と塗装後の光沢を併せ持つ鋼板を安価に安
定して圧延することができる。(Effects of the Invention) Since the present invention is configured and operated as described above, it is possible to manufacture a roll having much superior durability as a dull roll for cold rolling compared to the conventional one.
A steel plate having both good formability and gloss after painting can be rolled stably at low cost.
第1図は、本発明の工程説明図、第2図はダルロールの
圧延に使用中に突起の塑性変形あるいは摩耗状況を示す
走査電子顕微鏡組織写真である。
第3図は、本発明ロールおよび従来ロールについての、
鋼板の冷間圧延を行ったときの突起高さの変化を示す図
である。
第3図
fi是長こ
(J’7n)
手
ft−、先
補
正
書
(自発)
平成2年6月2
日
l、事件の表示
平成2年特許願第2
84号
2、発明の名称
ダルロールの製造法
3、補正をする者
事件との関係FIG. 1 is a process explanatory diagram of the present invention, and FIG. 2 is a scanning electron micrograph showing the plastic deformation or abrasion of the protrusions during rolling of the dull roll. FIG. 3 shows the roll of the present invention and the conventional roll.
It is a figure which shows the change of the protrusion height when performing cold rolling of a steel plate. Figure 3 fi Korenagako (J'7n) hand ft-, earlier amendment (spontaneous) June 2, 1990 l, indication of the case 1990 Patent Application No. 2 84 2, name of the invention Dalroll Manufacturing method 3, relationship with the case of the person making the amendment
Claims (1)
固後析出あるいは固溶硬化する元素をメッキした後、レ
ーザ処理、または放電加工することを特徴とする表面ダ
ルロールの製造法。 2、メッキ元素を、Cr、Mo、Ni、Al、Ti、W
、V、Nbの1種または2種以上とすることを特徴とす
る請求項1記載のダルロールの製造法。 3、メッキ層の厚さが必要とするダル突起高さの10分
の1ないし1倍であることを特徴とする請求項1記載の
ダルロール製造法。[Claims] 1. A surface dull roll characterized in that the roll surface is plated with an element that dissolves in solid solution in a high-temperature molten state and precipitates or hardens in solid solution after solidification, and then performs laser treatment or electrical discharge machining. manufacturing method. 2. Plating elements: Cr, Mo, Ni, Al, Ti, W
2. The method for producing dull rolls according to claim 1, characterized in that one or more of the following are selected from the group consisting of , V, and Nb. 3. The dull roll manufacturing method according to claim 1, wherein the thickness of the plating layer is 1/10 to 1 times the required height of the dull protrusions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2728490A JPH03234307A (en) | 1990-02-08 | 1990-02-08 | Manufacture of dull roll |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2728490A JPH03234307A (en) | 1990-02-08 | 1990-02-08 | Manufacture of dull roll |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03234307A true JPH03234307A (en) | 1991-10-18 |
Family
ID=12216774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2728490A Pending JPH03234307A (en) | 1990-02-08 | 1990-02-08 | Manufacture of dull roll |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03234307A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001066276A1 (en) * | 1998-12-10 | 2001-09-13 | Alcoa Inc. | An ultrafine matte finish roll for treatment for sheet products and method of production |
-
1990
- 1990-02-08 JP JP2728490A patent/JPH03234307A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001066276A1 (en) * | 1998-12-10 | 2001-09-13 | Alcoa Inc. | An ultrafine matte finish roll for treatment for sheet products and method of production |
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