JP3065270B2 - Composite sleeve roll and manufacturing method thereof - Google Patents
Composite sleeve roll and manufacturing method thereofInfo
- Publication number
- JP3065270B2 JP3065270B2 JP9085553A JP8555397A JP3065270B2 JP 3065270 B2 JP3065270 B2 JP 3065270B2 JP 9085553 A JP9085553 A JP 9085553A JP 8555397 A JP8555397 A JP 8555397A JP 3065270 B2 JP3065270 B2 JP 3065270B2
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- roll
- shaft portion
- diameter
- composite
- 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
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- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Press Drives And Press Lines (AREA)
- Powder Metallurgy (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、高硬度、高ヤング
率で高剛性を持つ超硬合金で構成された複合スリーブロ
ール及びその製造法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite sleeve roll made of a cemented carbide having a high hardness, a high Young's modulus and a high rigidity, and a method for producing the same.
【0002】[0002]
【従来の技術】鋼板や鋼線材、棒鋼の製造において、例
えばゼンジミアロール、線材ロール等が用いられるが、
扱う鋼材の高級化、省エネルギー化などの要望により、
高硬度、高ヤング率で耐摩耗性に優れた超硬合金を素材
としたロールが開発され使用されている。これら超硬合
金ロールは、取り扱う材料の形状から比較的径の細いも
の、例えば径が20〜80mm程度、或いは径が50〜150mmで
長さが100〜200mm程度の小型のロールが主であった。2. Description of the Related Art In the production of steel sheets, steel wire rods and steel bars, for example, a Sendzimir roll or a wire rod is used.
Due to demands for higher grade steel products and energy saving,
Rolls made of a cemented carbide material having high hardness, high Young's modulus and excellent wear resistance have been developed and used. These hard metal alloy rolls were relatively small in diameter due to the shape of the material to be handled, for example, small rolls having a diameter of about 20 to 80 mm, or a diameter of about 50 to 150 mm and a length of about 100 to 200 mm were mainly used. .
【0003】近時、鋼材の品質面の向上、製造コストの
低減のための長期連続運転の必要性から超硬合金ロール
の大型化が要望されている。Recently, there has been a demand for an increase in the size of a cemented carbide roll due to the necessity of long-term continuous operation for improving the quality of steel materials and reducing manufacturing costs.
【0004】一般に前記したゼンジミアロールは超硬合
金の一体物が適用され、又、線材ロール等は、軸材部
と、軸材部を中心軸としてその周囲に軸材部の径とほぼ
同等の内径の中空部を持つスリーブを軸方向に圧縮力を
かけるか、くさび型リング等により円周方向に圧縮力を
かけて軸材部に、固定し表面仕上げを行い製造してい
る。しかし従来のこのような超硬合金のスリーブを軸材
部に嵌合した複合ロールの製造方法で大型ロール(通常
径150mm以上及び長さ500mm以上を指す)を製造する際、
スリーブは通常、超硬合金の金属粉末をラバー成型し、
中心軸部分が中空(軸材の径と同等)の1個の中空部材
とし、仮焼したものを機械加工し本焼結、熱間等方加圧
(HIP処理)して製造し、これを軸材部に固定してい
るが、中空部材が大型であり特に超硬合金の素材である
ので、仮焼結等の熱処理時に材料に大きな歪みが発生し
たりしてその後の加工が困難となる場合が多い。In general, the above-mentioned Sendzimir roll is made of a solid cemented carbide, and a wire roll or the like has a shaft portion and a shaft portion having a central axis substantially equal to the diameter of the shaft portion around the shaft portion. It is manufactured by applying a compressive force in the axial direction to a sleeve having a hollow portion with an inner diameter of, or by applying a compressive force in the circumferential direction by a wedge-shaped ring or the like to fix the surface to the shaft portion and finish the surface. However, when manufacturing a large-sized roll (usually indicating a diameter of 150 mm or more and a length of 500 mm or more) by a conventional method of manufacturing a composite roll in which a sleeve of a cemented carbide is fitted to the shaft portion,
The sleeve is usually rubber molded from cemented carbide metal powder,
A single hollow member whose center shaft is hollow (equivalent to the diameter of the shaft) is machined, calcined, and then subjected to main sintering and hot isostatic pressing (HIP processing). Although it is fixed to the shaft part, since the hollow member is large and is made of a cemented carbide material in particular, large distortion occurs in the material during heat treatment such as temporary sintering, and subsequent processing becomes difficult Often.
【0005】又、前記中空部材をラバー成型する際、軸
材部と同等径の芯棒の周囲に超硬合金の金属粉を充分緻
密に充填したのち芯棒を抜去し成型体とするが、中空部
材が大型であると芯棒の抜去が困難となり、成形体の形
状が大きく崩れたり必要以上の力が必要となるなど作業
性に難点が生ずる等々問題が多かった。When the hollow member is subjected to rubber molding, a metal rod of a cemented carbide is sufficiently densely filled around a core rod having the same diameter as the shaft part, and then the core rod is removed to obtain a molded body. When the hollow member is large, it is difficult to remove the core rod, and there are many problems such as a difficulty in workability such as a large deformation of the shape of the molded body and an unnecessary force.
【0006】[0006]
【発明が解決しようとする課題】本発明は、超硬合金の
素材を用い長尺の大型ロールを製造するに際し、上記し
た材料の歪みもなく、又作業性も良好な複合スリーブロ
ールの製造法、及び高硬度、高ヤング率で耐磨耗性の優
れた複合スリーブロールを提供することを課題とするも
のである。SUMMARY OF THE INVENTION The present invention relates to a method of manufacturing a composite sleeve roll which is free from distortion of the above-mentioned material and has good workability when manufacturing a long large roll using a cemented carbide material. It is another object of the present invention to provide a composite sleeve roll having high hardness, high Young's modulus and excellent wear resistance.
【0007】[0007]
【課題を解決するための手段】本発明者らは、上記課題
の解決のため種々の検討を行った結果、ロールの中心軸
と交わる面で分割される複数個の中空部材をラバー成形
し、仮焼結後、中空部材を熱間等方加圧接合にて一体化
することにより仮焼結での熱による歪みの発生を抑制し
て長尺の大型ロールを精度良く作業性良く製造できるこ
とを見出し本発明を完成した。Means for Solving the Problems The present inventors have conducted various studies to solve the above-mentioned problems, and as a result, rubber-molded a plurality of hollow members divided at a plane intersecting the center axis of the roll, After pre-sintering, by integrating the hollow member by hot isostatic pressing, it is possible to suppress the generation of distortion due to heat in pre-sintering, and to produce long large rolls with good workability. The present invention has been completed.
【0008】即ち本発明は、軸材部を中心軸として軸材
部の周囲に、軸材部の径とほぼ同等の内径の中空部を持
つスリーブを、その中空部に軸材部を挿入し嵌合してこ
れらを固定したロールであって、前記スリーブがロール
の中心軸と交わる面で分割される複数個の成型部材を予
め一体化して構成されたスリーブであることを、特徴と
する複合スリーブロール及びその製造法に関するもので
ある。That is, according to the present invention, a sleeve having a hollow portion having an inner diameter substantially equal to the diameter of the shaft portion around the shaft portion around the shaft portion is inserted, and the shaft portion is inserted into the hollow portion. A roll in which the sleeves are fitted and fixed to each other, wherein the sleeve is a sleeve formed by previously integrating a plurality of molded members divided by a surface intersecting with the center axis of the roll, The present invention relates to a sleeve roll and a method for manufacturing the same.
【0009】次に本発明の一実施態様を図面を基に更に
詳細に説明する。図1は本発明で用いるスリーブを構成
する中空部材の外観図、図2は本発明で製造したロール
の中心軸に沿って切断した断面図である。図中1はスリ
ーブを構成する中空部材、2は中空部材の空洞部、3は
一体化したスリーブ、4は軸材部、5は側端リングを夫
々示す。Next, an embodiment of the present invention will be described in more detail with reference to the drawings. FIG. 1 is an external view of a hollow member constituting a sleeve used in the present invention, and FIG. 2 is a cross-sectional view taken along a center axis of a roll manufactured in the present invention. In the drawing, 1 is a hollow member constituting a sleeve, 2 is a hollow portion of the hollow member, 3 is an integrated sleeve, 4 is a shaft member, and 5 is a side end ring.
【0010】本発明で用いるロールの素材は超硬合金粉
末で、例えば、WC、TaC、TiC等である。本発明
では従来工具類の素材として用いる超硬合金粉末に比較
して粗い粒度、例えば径1〜10μmのものを用いることが
好ましく、このような比較的粗粒の素材を用いると後述
の成型工程において充填密度が向上し、高い耐摩耗性、
靱性を持った成型体とすることができる。素材にWCを
用いる場合、Coとの混合粉末(Co:5〜50wt%)を
用いるが、例えば、WC粉末と径1〜2μmのCo粉末と
を、共材からなる媒体を用い不活性雰囲気下で混合して
用いることが好ましい。The material of the roll used in the present invention is a cemented carbide powder, for example, WC, TaC, TiC or the like. In the present invention, it is preferable to use coarse particles, for example, having a diameter of 1 to 10 μm as compared with cemented carbide powder used as a material for conventional tools. In the packing density is improved, high wear resistance,
A molded article having toughness can be obtained. When WC is used as a raw material, a mixed powder with Co (Co: 5 to 50 wt%) is used. For example, WC powder and Co powder having a diameter of 1 to 2 μm are mixed in a medium made of a common material under an inert atmosphere. Are preferably used in combination.
【0011】これら超硬合金の粉末を用いて中空部材を
構成する成型体(図中1)を構成するには、ラバー製
型、例えば、所定の径を持つ外筒と、その深さ(縦)方
向の中心軸を共通とする前記外筒の径より小さい径を持
つ内筒とで構成されるパイプ形状の二重円筒で、肉薄で
伸縮強度の高い例えばゴム等で構成されたラバー製型を
用い、前記内筒の縦方向の中心軸に、同じく中心軸を合
わせてその内径とほぼ同等の径を持つ芯棒をその中心軸
部分に挿入し、外筒の内壁と内筒の外壁で構成された空
間にロール素材の超硬質粉末を例えばハンマー式充填機
等を用い充分緻密となる状態に充填する。In order to form a molded body (1 in the figure) which forms a hollow member using the powder of the cemented carbide, a rubber mold, for example, an outer cylinder having a predetermined diameter and a depth (length) ) A pipe-shaped double cylinder composed of an inner cylinder having a diameter smaller than the diameter of the outer cylinder having a common central axis in a direction, and a rubber mold made of, for example, rubber, which is thin and has high elasticity. Using the center axis of the inner cylinder in the longitudinal direction, the center axis is also aligned, and a core rod having a diameter substantially equal to the inner diameter is inserted into the center axis portion, and the inner wall of the outer cylinder and the outer wall of the inner cylinder are inserted. The formed space is filled with ultra-hard powder of a roll material in a sufficiently dense state using, for example, a hammer-type filling machine.
【0012】ここで用いるラバー製型は通常の冷間等方
加圧(CIP処理)成型に用いられるもので、本発明で
は製品ロールの大きさにより決められるが、例えば二重
円筒の外筒の内径200〜600mm、内筒の外径100〜500mm、
深さ(縦方向の長さ)300〜1500mm程度のもので、従来
の超硬質素材で構成されたロールのスリーブに比較して
大型で長尺であることが特徴である。又、芯棒はロール
の軸材部にほぼ相当する径を持つ圧縮強度の高い素材か
らなる棒、中空パイプ等を用いる。The rubber mold used here is used for ordinary cold isostatic pressing (CIP processing) molding, and is determined by the size of a product roll in the present invention. Inner diameter 200-600mm, inner cylinder outer diameter 100-500mm,
It has a depth (length in the vertical direction) of about 300 to 1500 mm, and is characterized in that it is larger and longer than a conventional roll sleeve made of a super-hard material. Further, as the core rod, a rod, a hollow pipe or the like made of a material having high compression strength and having a diameter substantially corresponding to the shaft portion of the roll is used.
【0013】ラバー製型は粉末の充填時に一定形状を保
持するように、その外周を例えば金属容器で保護固定す
ることが好ましい。この容器は後のCIP処理の際、充
填成型した成型体の表面に均等圧が施されるようにその
壁面等に多数の導通孔を持つものを用いると良い。尚、
超硬質粉末を型に充填する際、従来のCIP成型で充填
粉末に混合して用いる滑剤としてのワックス、ステアリ
ン酸、樟脳等は本発明では特に用いなくても充分緻密な
成型体とすることができる。It is preferable that the outer periphery of the rubber mold is protected and fixed by, for example, a metal container so as to maintain a constant shape when the powder is filled. It is preferable to use a container having a large number of through-holes in its wall surface or the like so that a uniform pressure is applied to the surface of the molded product in the subsequent CIP treatment. still,
When the ultra-hard powder is filled in a mold, wax, stearic acid, camphor and the like as a lubricant used by being mixed with the filler powder in the conventional CIP molding may be formed into a sufficiently dense molded body without being particularly used in the present invention. it can.
【0014】充分緻密に超硬質粉末を充填した後ラバー
製型の中心軸部分に挿入した芯棒を抜去し、中心軸部分
に空洞部(図中2)を持ったラバー型成型体とする。こ
の芯棒の抜去は後のCIP処理において、成型体の中心
軸部分(空洞部)表面と外周部分表面とをほぼ相似則に
沿った均一な加圧状態とする上で好ましい態様である。After the ultra-hard powder is sufficiently densely filled, the core rod inserted into the center shaft of the rubber mold is removed, and a rubber molded body having a cavity (2 in the figure) in the center shaft is obtained. This removal of the core rod is a preferable embodiment in the subsequent CIP treatment, in that the surface of the central axis (cavity) and the surface of the outer peripheral portion of the molded body are brought into a uniform pressurized state substantially in accordance with the similarity rule.
【0015】芯棒を抜去し、中心軸部分を空洞にした成
型体は直接CIP成型を行うが、その条件は例えば1000
〜3000kgf/cm2で5〜60分が良い。The molded body with the core rod removed and the central shaft portion hollowed out is directly subjected to CIP molding.
A good 5 to 60 minutes in ~3000kgf / cm 2.
【0016】CIP処理を行うと寸法精度が良好とな
り、仮焼結後の機械加工量が少なくなるので、行った方
が良いが、行わなくとも良い。The CIP treatment improves the dimensional accuracy and reduces the amount of machining after preliminary sintering, so it is better to perform the CIP treatment, but it is not necessary to perform it.
【0017】上記したような工程を経てCIP処理で得
た成型体は寸法精度も良好でほぼ設計どうりの成型体と
して得られるが、後の仮焼結処理工程において、成型体
自重による変形、加熱による収縮等の変形が考えられ
る。そこで、仮焼結処理に際しては、このような変形防
止を考慮し、例えば黒鉛製の芯材等の治具を使用するこ
とが好ましい。又、治具と成型体との接触界面の不必要
な反応の防止に治具表面に例えばボロンナイトライド
(BN)等の反応防止剤を塗布して用いるとさらに良
い。The molded product obtained by the CIP process through the above-described steps has good dimensional accuracy and can be obtained as a molded product substantially as designed. Deformation such as shrinkage due to heating is conceivable. Therefore, in the preliminary sintering process, it is preferable to use a jig such as a graphite core material in consideration of such deformation prevention. Further, it is more preferable to apply a reaction inhibitor such as boron nitride (BN) to the surface of the jig to prevent unnecessary reaction at the contact interface between the jig and the molded body.
【0018】CIP成型を施した成型体は仮焼結処理を
行う。その条件は、好ましくは成型体を横置き、即ちそ
の中心軸がほぼ水平となる状態で加熱する真空炉で行う
と、前記した成型体の変形を防止する上で好ましい、仮
焼結条件は、例えば550〜800℃、1〜3時間程度が好まし
い。仮焼結処理した成型体は寸法精度も良好であり、例
えばダイヤモンドバイト、旋盤等による所定の形状加工
が必要な場合でもこれらの加工に充分耐えられる強度を
持つものである。The molded body subjected to the CIP molding is subjected to a temporary sintering process. The conditions are preferably placed horizontally, that is, when performed in a vacuum furnace heated in a state where the center axis thereof is substantially horizontal, in order to prevent the deformation of the molded body, the sintering conditions are preferably: For example, 550 to 800 ° C. and about 1 to 3 hours are preferable. The pre-sintered molded body has good dimensional accuracy, and has a strength enough to withstand such processing even when a predetermined shape processing by a diamond tool, a lathe or the like is required.
【0019】本発明では、仮焼結又は仮焼結後形状加工
した成型体を複数個接合して一体化したスリーブとして
用いることが特徴であり、個々の成型体はその中心軸と
交る面どうしを中心軸を同一とする状態に重ね合せて加
圧焼結などの方法で一体化する。加圧焼結は、加圧と焼
結(本焼結)を同時に実施しても良く、又、本焼結の後
加圧を行っても良い。The present invention is characterized in that a plurality of pre-sintered or pre-sintered shaped bodies are joined and used as an integrated sleeve, and each of the formed bodies has a surface which intersects the central axis. The two are superimposed on each other so as to have the same central axis, and integrated by a method such as pressure sintering. In the pressure sintering, the pressing and the sintering (main sintering) may be performed simultaneously, or the pressing may be performed after the main sintering.
【0020】加圧と焼結同時処理の場合、CIP成型体
又は仮焼結処理した成型体を機械加工し、寸法精度を上
げ、成型体を複数個接合させた状態でセットし、これを
キャンニングしHIP処理を行う。ここで行う本焼結H
IP処理は、例えばAr雰囲気下、1000〜2000kgf/c
m2、1100〜1200℃、0.5〜2時間保持後、さらに1300〜13
50℃にて1〜3時間保持して行うと良い。あるいは、バイ
ンダーを接合面に塗布する方法でも良い。なお、バイン
ダーとしてはCo,Ni,Cr等が良い。In the case of simultaneous pressurization and sintering, the CIP molded body or the pre-sintered molded body is machined to improve dimensional accuracy, and set in a state where a plurality of molded bodies are joined, and this is And perform HIP processing. Main sintering H performed here
The IP treatment is performed, for example, in an Ar atmosphere at 1000 to 2000 kgf / c.
m 2 , 1100-1200 ° C, after holding for 0.5-2 hours, then 1300-13
It is recommended to hold at 50 ° C for 1 to 3 hours. Alternatively, a method of applying a binder to the bonding surface may be used. Note that Co, Ni, Cr and the like are preferable as the binder.
【0021】本焼結の後に加圧処理する場合は、黒鉛成
型品の機械加工により精度の高い円筒材、芯材、上下蓋
を作成し、これにスリーブ材を重ね合せセットし、真空
炉にて微量の水素ガスを導入しながら10-3〜10-5mmHgの
雰囲気に保ち、1000〜1200℃にて0.5〜2時間保持後、12
00〜1350℃にて更に1〜3時間保持し本焼結を実施すると
良い。この二段階加熱は、焼結時における収縮変形を均
一に行うための処置である。前記、本焼結後の焼結体は
ほぼ真比重の94〜98%のものであり、この成型体をAr
雰囲気下、1000〜2000kgf/cm2、1200〜1350℃で1〜3時
間保持しHIP処理する。When pressure treatment is performed after the main sintering, a highly accurate cylindrical material, a core material, and upper and lower lids are prepared by machining a graphite molded product, and a sleeve material is superimposed and set thereon. While maintaining a 10-3 to 10-5 mmHg atmosphere while introducing a small amount of hydrogen gas, and after maintaining at 1000 to 1200 ° C for 0.5 to 2 hours, 12
Main sintering is preferably performed at a temperature of 00 to 1350 ° C. for another 1 to 3 hours. The two-stage heating is a treatment for uniformly performing shrinkage deformation during sintering. The sintered body after the main sintering is approximately 94 to 98% of the true specific gravity.
In an atmosphere, HIP treatment is carried out at 1000 to 2000 kgf / cm 2 at 1200 to 1350 ° C. for 1 to 3 hours.
【0022】上記した二通りの方法では加圧焼結を行な
って、中空部材を一体化するのに最終的にHIP処理を
行うが、この処理は成型体の密度の向上及び接合面での
密着性の向上に好ましい結果を与える。In the two methods described above, pressure sintering is performed, and finally HIP processing is performed to integrate the hollow members. Gives a favorable result for improving the properties.
【0023】加圧焼結により得られた一体化した中空部
材のスリーブは、更に必要に応じて機械加工により研
削、研磨等を行い、その空洞部にロールの軸部材を挿入
し嵌合して焼きバメ、冷しバメなどの通常の方法でこれ
らを固定すると良い。The integrated hollow member sleeve obtained by pressure sintering is further subjected to grinding, polishing and the like by machining if necessary, and a shaft member of a roll is inserted and fitted into the hollow portion. It is advisable to fix them by a usual method such as grilling and cooling.
【0024】尚、軸部材は、例えばクロム鋼、クロムモ
リブデン鋼、高速度鋼を調質し通常の方法で作成したも
のが用いられ、径はスリーブの空洞部径と同等で、長さ
は1000〜5000mm程度のものが用いられる。The shaft member is prepared by tempering chromium steel, chromium molybdenum steel, high-speed steel, and the like, and has a diameter equal to the diameter of the hollow portion of the sleeve and a length of 1000. A size of about 5000 mm is used.
【0025】尚一例として、WC−15%Co混合粉を用
いて上記の方法で加工した部品の物理特性は次のとおり
であった。硬度(HRA)が86.0、密度が13.8g/cm3、抗折
力が210〜250kgf/mm2であった。As an example, the physical properties of the parts processed by the above method using the WC-15% Co mixed powder were as follows. The hardness (HRA) was 86.0, the density was 13.8 g / cm 3 , and the transverse rupture strength was 210 to 250 kgf / mm 2 .
【0026】このようにして得られた複合スリーブロー
ルは、軸部材の長手方向のほぼ中央部に肉厚部を持つ大
型の長尺ロールで、鉄鋼、非鉄金属部門での線材の加工
や冷間圧延に使用される。The composite sleeve roll obtained in this manner is a large-sized long roll having a thick portion substantially at the center in the longitudinal direction of the shaft member. Used for rolling.
【0027】[0027]
【発明の実施の形態】以下、本発明を実施例を用いて説
明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments.
【0028】実施例1 粒径約3〜5μmのWCと、径約1〜2μmのCoを混合した
粉末(Co:15wt%)を、WC製のボールを混合媒体と
して2日間混合した混合粉末を、外筒の内径が約400mm、
深さ850mmで、内筒の内径約180mmの二重筒の中心軸部分
に、径約180mm、長さ1000mmのパイプ状の芯棒を挿入し
た二重円筒ラバー製型の外筒と内筒で構成された間隙に
充填した。充填はハンマー式充填機上にラバー製型を置
き粉末を等量づつ充填した後加圧する工程を繰返し行う
方法を採った。Example 1 A mixed powder obtained by mixing WC having a particle diameter of about 3 to 5 μm and Co having a diameter of about 1 to 2 μm (Co: 15 wt%) for 2 days using a WC ball as a mixing medium. , The inner diameter of the outer cylinder is about 400mm,
The outer cylinder and inner cylinder are made of a double-cylinder rubber with a depth of 850 mm and a pipe-shaped core rod with a diameter of about 180 mm and a length of 1000 mm inserted into the center axis of a double cylinder with an inner diameter of about 180 mm. The configured gap was filled. For the filling, a method was employed in which a rubber mold was placed on a hammer-type filling machine, the powder was filled in equal amounts, and then the step of pressing was repeated.
【0029】次に芯棒を引抜き中心軸部分が空洞で貫通
した成型体とした。同様にして2個の成型体を製作し
た。成型体は次いで2850kg/cm2で10分間保持しCIP
処理を行った。CIP処理で得た成型体は、外径330m
m、内径160mm、長さ730mmの中空部材であり、これをさ
らに機械加工により表面、内面及び接合面を平滑にし、
所定の寸法に仕上げ、2個の中空部材を黒鉛製芯材に装
着し、真空炉で微量の水素を導入し、10-3〜10-5mmHg
で、1120℃、2時間一次焼結した。一次焼結体は、更に
黒鉛製芯材に装着し、1250℃、2時間二次焼結した。こ
の焼結体は、Ar雰囲気下1330℃、1000kgf/cm2、2時
間HIP処理を行った。HIP処理したスリーブである
成型体の、接合部の抗折力は180〜220kgf/mm2であっ
た。又、硬度は86〜88HRAであった。Next, the core rod was pulled out to obtain a molded body whose central axis portion was hollow and penetrated. Similarly, two molded bodies were manufactured. The molded body is then held at 2850 kg / cm 2 for 10 minutes and CIP
Processing was performed. The molded product obtained by CIP processing has an outer diameter of 330 m.
m, a hollow member with an inner diameter of 160 mm and a length of 730 mm, which is further machined to smooth the surface, inner surface and joint surface,
Finished to predetermined dimensions, attached two hollow members to graphite core material, introduced a small amount of hydrogen in a vacuum furnace, 10 -3 ~ 10 -5 mmHg
At 1120 ° C. for 2 hours. The primary sintered body was further mounted on a graphite core material and secondary sintered at 1250 ° C. for 2 hours. This sintered body was subjected to HIP treatment at 1330 ° C., 1000 kgf / cm 2 for 2 hours in an Ar atmosphere. The transverse rupture strength at the joint of the molded body as the sleeve subjected to the HIP treatment was 180 to 220 kgf / mm 2 . The hardness was 86 to 88 HRA.
【0030】次に、5%クロム鋼を調質し、径約140mm、
長さ約3500mmの軸材部を、外径280mm、内径140mm、長さ
1230mmのスリーブに挿入し、機械加工してロールとし
た。このロールを用いて、鋼板を圧延したが、ロール破
損もなく良好な薄板を得た。Next, 5% chrome steel was tempered to a diameter of about 140 mm,
Approximately 3500mm length shaft material, outer diameter 280mm, inner diameter 140mm, length
It was inserted into a 1230 mm sleeve and machined into rolls. Using this roll, a steel plate was rolled, and a good thin plate was obtained without roll breakage.
【0031】[0031]
【発明の効果】本発明の複合スリーブロールは歪みの少
ない、比較的長尺のであり、本発明の製造法は超硬合金
スリーブを熱処理する際にも材料の歪みが発生せず、又
作業性も良好に大型長尺の高硬度、高ヤング率で耐磨耗
性の優れた複合スリーブロールを製造することができ
る。The composite sleeve roll of the present invention is relatively long with little distortion, and the manufacturing method of the present invention does not cause distortion of the material even when the cemented carbide sleeve is subjected to heat treatment, and the workability is improved. In addition, a large-sized long composite sleeve roll having high hardness, high Young's modulus and excellent wear resistance can be produced.
【図1】本発明で用いる2個の中空部材の外観図。FIG. 1 is an external view of two hollow members used in the present invention.
【図2】本発明で製造したロールの中心軸に沿って切断
した断面の説明図。FIG. 2 is an explanatory view of a cross section cut along a central axis of a roll manufactured according to the present invention.
1 スリーブを構成する中空部材 2 中空部材の空洞部 3 一体化したスリーブ 4 軸材部 5 側端リング DESCRIPTION OF SYMBOLS 1 Hollow member which comprises a sleeve 2 Hollow part of a hollow member 3 Integrated sleeve 4 Shaft part 5 Side end ring
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI B30B 11/00 B30B 11/00 E (72)発明者 剣持 一仁 千葉県千葉市中央区川崎町1 川崎製鉄 株式会社 技術研究所内 (72)発明者 狩野 裕隆 千葉県千葉市中央区川崎町1 川崎製鉄 株式会社 技術研究所内 (72)発明者 鑓田 征雄 千葉県千葉市中央区川崎町1 川崎製鉄 株式会社 技術研究所内 (72)発明者 園部 治 千葉県千葉市中央区川崎町1 川崎製鉄 株式会社 技術研究所内 (56)参考文献 特開 平5−169114(JP,A) 特開 平5−237510(JP,A) 実開 昭59−81502(JP,U) 実開 昭59−148160(JP,U) 実開 昭60−38603(JP,U) 実開 平2−118603(JP,U) (58)調査した分野(Int.Cl.7,DB名) B21B 27/00 B22F 7/08 B30B 5/02 B30B 11/00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI B30B 11/00 B30B 11/00 E (72) Inventor Kazuhito Kenmochi 1 Kawasakicho, Chuo-ku, Chuo-ku, Chiba-shi, Chiba Pref. In-house (72) Inventor Hirotaka Kano 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Prefecture Kawasaki Steel Engineering Co., Ltd. Inventor Osamu Sonobe 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Inside the Technical Research Laboratory, Kawasaki Steel Corporation (56) 59-81502 (JP, U) Japanese Utility Model sho 59-148160 (JP, U) Japanese Utility Model sho 60-38603 (JP, U) Japanese Utility Model hei 2-118603 (JP, U) (58) Field surveyed (Int. Cl. 7 , D B name) B21B 27/00 B22F 7/08 B30B 5/02 B30B 11/00
Claims (8)
軸材部の径とほぼ同等の内径の中空部を持つスリーブ
を、その中空部に軸材部を挿入し嵌合してこれらを固定
したロールであって、前記スリーブがロールの中心軸と
交わる面で分割される複数個の成型体部材を、予め一体
化して構成されたスリーブであることを特徴とする複合
スリーブロール。1. Around the shaft portion around the shaft portion as a central axis,
A roll in which a sleeve having a hollow portion having an inner diameter substantially equal to the diameter of the shaft portion is fixed by inserting the shaft portion into the hollow portion and fixing them, and the sleeve intersects the center axis of the roll. A composite sleeve roll, which is a sleeve in which a plurality of molded members divided by a surface are previously integrated.
成型して得たスリーブを用いた請求項1に記載の複合ス
リーブロール。2. Cold isostatic pressing (CIP) of a cemented carbide material powder
The composite sleeve roll according to claim 1, wherein a sleeve obtained by molding is used.
項2に記載の複合スリーブロール。3. The composite sleeve roll according to claim 2, wherein the superhard material is a WC-Co mixture.
の中心軸をほぼ同軸として焼結処理及び/または熱間等
方加圧(HIP)し一体としたものである請求項1から
請求項3のいずれかに記載の複合スリーブロール。4. The sleeve according to claim 1, wherein the plurality of molded members are formed by sintering and / or hot isostatic pressing (HIP) with their central axes substantially coaxial. 3. The composite sleeve roll according to any one of 3.
軸材部の径とほぼ同等の内径の中空部を持つスリーブ
を、その中空部に軸材部を挿入し嵌合してこれらを固定
したロールであって、中心軸と交わる面で分割される複
数個の成型体部材を予め一体化して構成されたスリーブ
を、軸材部に嵌合し固定することを特徴とする複合スリ
ーブロールの製造法。5. Around the shaft portion around the shaft portion as a central axis,
A roll in which a sleeve having a hollow portion with an inner diameter substantially equal to the diameter of the shaft portion is fixed by inserting the shaft portion into the hollow portion and fixing them, and is divided at a plane intersecting the central axis. A method for manufacturing a composite sleeve roll, wherein a sleeve constituted by integrating a plurality of molded members in advance is fitted and fixed to a shaft member.
成型して得たスリーブを用いる請求項5に記載の複合ス
リーブロールの製造法。6. Cold isostatic pressing (CIP) of a cemented carbide material powder
The method for producing a composite sleeve roll according to claim 5, wherein a sleeve obtained by molding is used.
項5又は請求項6に記載の複合スリーブロールの製造
法。7. The method for producing a composite sleeve roll according to claim 5, wherein the cemented carbide material is a WC-Co mixture.
の中心軸をほぼ同軸として焼結処理及び/または熱間等
方加圧(HIP)し一体としたものである請求項5から
請求項7のいずれかに記載の複合スリーブロールの製造
法。8. The sleeve according to claim 5, wherein the plurality of molded members are integrally formed by sintering and / or hot isostatic pressing (HIP) with their central axes substantially coaxial. 8. The method for producing a composite sleeve roll according to any one of 7.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9085553A JP3065270B2 (en) | 1997-03-21 | 1997-03-21 | Composite sleeve roll and manufacturing method thereof |
US09/180,672 US6374494B1 (en) | 1997-03-21 | 1998-03-19 | Compound roll for thin cold rolled steel strip and method of manufacturing same |
PCT/JP1998/001181 WO1998042458A1 (en) | 1997-03-21 | 1998-03-19 | Compound roll for thin cold rolled steel strip and method of manufacturing same |
EP98909761A EP0913212A4 (en) | 1997-03-21 | 1998-03-19 | Compound roll for thin cold rolled steel strip and method of manufacturing same |
KR1019980709563A KR100338572B1 (en) | 1997-03-21 | 1998-03-19 | Compound roll for thin cold rolled steel strip and method of manufacturing same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9085553A JP3065270B2 (en) | 1997-03-21 | 1997-03-21 | Composite sleeve roll and manufacturing method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10263627A JPH10263627A (en) | 1998-10-06 |
JP3065270B2 true JP3065270B2 (en) | 2000-07-17 |
Family
ID=13862031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9085553A Expired - Lifetime JP3065270B2 (en) | 1997-03-21 | 1997-03-21 | Composite sleeve roll and manufacturing method thereof |
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Country | Link |
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JP (1) | JP3065270B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6281385B2 (en) * | 2014-04-03 | 2018-02-21 | 日立金属株式会社 | Method for manufacturing outer layer made of cemented carbide for rolling roll |
-
1997
- 1997-03-21 JP JP9085553A patent/JP3065270B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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JPH10263627A (en) | 1998-10-06 |
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