JPS6397304A - Compound ring roll having excellent seizure resistance - Google Patents
Compound ring roll having excellent seizure resistanceInfo
- Publication number
- JPS6397304A JPS6397304A JP24185786A JP24185786A JPS6397304A JP S6397304 A JPS6397304 A JP S6397304A JP 24185786 A JP24185786 A JP 24185786A JP 24185786 A JP24185786 A JP 24185786A JP S6397304 A JPS6397304 A JP S6397304A
- Authority
- JP
- Japan
- Prior art keywords
- outer layer
- inner layer
- graphite
- ring roll
- roll
- 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
- 150000001875 compounds Chemical group 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 27
- 239000010439 graphite Substances 0.000 claims abstract description 27
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 18
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 238000009792 diffusion process Methods 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 32
- 239000011651 chromium Substances 0.000 claims description 22
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 13
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- 238000001513 hot isostatic pressing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 description 9
- 230000000171 quenching effect Effects 0.000 description 7
- 239000000956 alloy Substances 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 238000010791 quenching Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910003470 tongbaite Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 230000002087 whitening effect Effects 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
- B21B27/02—Shape or construction of rolls
- B21B27/03—Sleeved rolls
- B21B27/035—Rolls for bars, rods, rounds, tubes, wire or the like
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、線材や棒材等の型鋼圧延用リングロールに関
する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a ring roll for rolling shaped steel such as wire rods and bars.
（従来の技術）
線材等の型調圧延機には、最近、超硬焼結リングロール
が用いられ、例えば、ブロックミルでは第６図の如き超
硬材（ＷＣ粉末とＣｏが主体）により形成されたリング
ロールが使用されている。また、該リングロールは、軸
に機械的に固着して型鋼圧延用組立ロールとして使用さ
れる。(Prior art) Recently, cemented carbide sintered ring rolls have been used in shape rolling mills for wire rods, etc. For example, in block mills, rolls made of carbide (mainly made of WC powder and Co) as shown in Fig. 6 are used. A ring roll is used. Further, the ring roll is mechanically fixed to a shaft and used as an assembly roll for rolling shaped steel.
（発明が解決しようとする問題点）
超硬リングロールを軸嵌して組立ロールとして使用する
場合、リング全体が超硬材であり経済的でないばかりか
、固定リング、スペーサーリング等を用いた複雑な組立
構造とする必要がある。すなわち、リングロールを軸に
組立て固着する場合、軸に強固に固定する必要があり、
又鋼糸の軸と超硬リング材の熱膨張係数の大きい差を緩
和する必要があるからである。その結果、斯る組立ロー
ルはコストが非常に高くなる。(Problems to be Solved by the Invention) When a carbide ring roll is shaft-fitted and used as an assembly roll, not only is the entire ring made of carbide material, which is not economical, but it is also complicated due to the use of fixing rings, spacer rings, etc. It is necessary to have a suitable assembly structure. In other words, when assembling and fixing the ring roll to the shaft, it is necessary to firmly fix it to the shaft.
This is also because it is necessary to alleviate the large difference in coefficient of thermal expansion between the shaft of the steel thread and the carbide ring material. As a result, such assembled rolls are very costly.
また、超硬リングロールは、耐摩耗性には優れるものの
耐焼付性に難があり、一旦焼付が生じると、焼付部が鋼
材にプリントされて肌荒れが生じるという欠点がある。Further, although carbide ring rolls have excellent wear resistance, they have poor seizure resistance, and once seizure occurs, the burned portion is printed on the steel material and the surface becomes rough.
そこで、耐摩耗性および耐焼付性を兼備した外層と強靭
性を有する内層からなる複合リングロールが要望されて
いる。Therefore, there is a need for a composite ring roll comprising an outer layer having both wear resistance and seizure resistance and an inner layer having toughness.
かかる複合リングロールの製造性として、遠心力鋳造法
が考えられる。しかし、この場合、高合金材の外層に内
層を鋳造したときに、外層内面が溶解されて高合金成分
が内層に混入し、内層の強靭性を劣化させると共に、外
層の高合金材の歩留を悪化させる欠点がある。A centrifugal casting method can be considered as a method for manufacturing such a composite ring roll. However, in this case, when the inner layer is cast on the outer layer of high alloy material, the inner surface of the outer layer is melted and the high alloy components are mixed into the inner layer, which deteriorates the toughness of the inner layer and reduces the yield of the high alloy material of the outer layer. There are drawbacks that make it worse.
本発明は軟土の問題に鑑みなされたものであって、その
目的は、超硬リングロールよりやや耐摩耗性が劣るが、
外層に優れた耐摩耗性と耐焼付性とを具備し、低コスト
であって、しかも外層から内層への成分の移行が可及的
に抑止された強靭な内層を有する複合リングロールを提
供することを目的とするものである。The present invention was made in view of the problem of soft soil, and its purpose is to provide a ring roll with slightly lower wear resistance than that of a carbide ring roll.
To provide a composite ring roll having an outer layer having excellent wear resistance and seizure resistance, being low in cost, and having a strong inner layer in which migration of components from the outer layer to the inner layer is suppressed as much as possible. The purpose is to
（問題点を解決するための手段） 前記目的を達成するために次の手段を講じた。(Means for solving problems) The following measures were taken to achieve the above objective.
すなわち、この手段は、複合リングロールの外層を黒鉛
が晶出した高クロム鋳鉄材で形成し、内層を靭性に優れ
た鋼材で形成し、両者を熱間静水圧加圧により拡散接合
するものである。That is, in this method, the outer layer of the composite ring roll is formed from a high chromium cast iron material containing crystallized graphite, the inner layer is formed from a steel material with excellent toughness, and the two are diffusion bonded by hot isostatic pressing. be.
（作 用）
外層は黒鉛が晶出した高クロム鋳鉄材で形成したから、
優れた耐摩耗性と耐焼付性を兼備する。(Function) The outer layer is made of high chromium cast iron with crystallized graphite.
Combines excellent wear resistance and seizure resistance.
また、前記外層と強靭性に優れた内層とは、熱間静水圧
加圧によって拡散接合されているので、接合に際し、外
層から内層へ高合金成分の移行を可及的に抑止すること
ができ、内層の強靭性を劣化させることがない。In addition, since the outer layer and the inner layer with excellent toughness are diffusion bonded by hot isostatic pressing, migration of high alloy components from the outer layer to the inner layer can be suppressed as much as possible during bonding. , without deteriorating the toughness of the inner layer.
（実施例）
次に図面を参照して本発明の複合リングロールについて
詳述する。(Example) Next, the composite ring roll of the present invention will be described in detail with reference to the drawings.
第１図は本発明に係る複合リングロールの構造を示す断
面図である。FIG. 1 is a sectional view showing the structure of a composite ring roll according to the present invention.
複合リングロール１は、黒鉛が晶出した高クロム鋳鉄材
で形成された外層２と、靭性に優れた鋼材で形成された
内層３とが熱間静水圧加圧（以下、ＨＩ Ｐという。）
により拡散接合されて一体化されている。The composite ring roll 1 has an outer layer 2 made of a high chromium cast iron material in which graphite has crystallized, and an inner layer 3 made of a steel material with excellent toughness, which are formed by hot isostatic pressing (hereinafter referred to as HIP).
They are integrated by diffusion bonding.
かかる複合リングロールｌは、第２図（１）、 （２＞
のように、黒鉛が晶出した高クロム鋳鉄材で鋳造された
外層素材から外層素材リング２′を、強靭性のある鋼材
から内層素材リング３°を適宜寸法に加工した後、両者
を嵌合しＨＩＰ処理により拡散接合して得られた複合素
材を所望の形状に加工して製作される。Such a composite ring roll l is shown in FIG. 2 (1), (2>
As shown in the figure, after processing the outer layer material ring 2' from the outer layer material cast from high chromium cast iron material with crystallized graphite and the inner layer material ring 3° from a strong steel material to appropriate dimensions, the two are fitted together. It is manufactured by processing a composite material obtained by diffusion bonding using HIP processing into a desired shape.
この場合、外層素材リング２゛の外径Ｄ１°は、第１図
の製品外径り、より加工代部分だけ大きくし、又その内
径Ｄ２は、製品の外層２と内層３との境界の直径り、と
同じとする。一方、内層素材リング３゛の外径はＤよと
し、その内径り、゛は、内面の加工代部分だけ製品内径
り、より小さくするのは当然である。又素材リングの幅
も製品幅より加工化分を見込んで大きくする。In this case, the outer diameter D1° of the outer layer material ring 2 is made larger than the product outer diameter in Fig. 1 by the processing allowance, and the inner diameter D2 is the diameter of the boundary between the outer layer 2 and inner layer 3 of the product. It is assumed that ri is the same as . On the other hand, the outer diameter of the inner layer material ring 3' is assumed to be D, and the inner diameter is naturally smaller than the inner diameter of the product by the machining allowance on the inner surface. Also, the width of the material ring is made larger than the product width in consideration of the amount of processing required.
このようにして得られた外層素材リング２′と内層素材
リング３゛とを嵌合して、嵌合部を電子ビーム溶接する
か、嵌合体を封缶して脱気し、嵌合部を真空状態とし、
その後両者をＨＩＰ処理により拡散接合する。その結果
、外層から内層へＣｒの混入が可及的に抑止され、かつ
両者が強固に結合一体化した複合リング素材が得られる
。The thus obtained outer layer material ring 2' and inner layer material ring 3' are fitted together, and the fitted portion is electron beam welded, or the fitted body is sealed and degassed, and the fitted portion is closed. In a vacuum state,
Thereafter, both are diffusion bonded by HIP processing. As a result, a composite ring material is obtained in which the mixing of Cr from the outer layer to the inner layer is suppressed as much as possible, and the two are strongly bonded and integrated.
外層を形成する黒鉛が晶出した高クロム鋳鉄材は、Ｍ、
Ｃ，型の高硬度カーバイドと黒鉛とが組織中に共存して
いるため、耐摩耗性と耐焼付性とを兼備している。＆［
Ｉ獄中に黒鉛が面積率で０．５〜８．０％存在し、極め
て良好な耐摩耗性と耐焼付性とを有する組成として次の
ものを挙げることができる。すなわち、重量％で、
Ｃ：２．４〜３．４％ Ｎｉ：４．５〜１０％Ｓｉ
： ２．０〜３．４％ Ｃｒ ： ５〜１０％Ｍｎ
： ０．５〜１．５％ Ｍｏ ： ０．４〜３．０
％Ｐｒｏ、１％以下 残部実質的にＦｅＳ ： ０
．０８％以下
上記高クロム鋳鉄材の成分限定理由は次の通りである。The high chromium cast iron material with crystallized graphite forming the outer layer is M,
Since C. type high hardness carbide and graphite coexist in the structure, it has both wear resistance and seizure resistance. &[
Examples of compositions in which graphite is present in an area ratio of 0.5 to 8.0% and have extremely good wear resistance and seizure resistance include the following. That is, in weight%, C: 2.4-3.4% Ni: 4.5-10% Si
: 2.0~3.4% Cr: 5~10% Mn
: 0.5~1.5% Mo: 0.4~3.0
%Pro, 1% or less Remainder substantially FeS: 0
．． The reason for limiting the composition of the high chromium cast iron material is as follows.
Ｃ：２，４〜３．４％
ＣはＣｒと結合してクロムカーバイトを形成する他、後
述するＳｉ＋Ｎｔの黒鉛化生成元素により微細な黒鉛を
晶出するものである。しかしてＣ２，４％未満ではクロ
ムカーバイドが減少すると共に黒鉛の晶出もなくなり、
目的とする黒鉛晶出高クロム鋳鉄が得られなくなる。一
方Ｃ３，４％を越えてはＣｒ含有量との関係にもよるが
、本発明の場合ではＣｒが１０％以下に抑えられるため
、過飽和の炭素が高いＳｉ、 Ｎｉ含有量のため黒鉛化
し、黒鉛品出量が過剰となって耐摩耗性の点で劣化する
。C: 2.4 to 3.4% C not only combines with Cr to form chromium carbide, but also crystallizes fine graphite by the graphitization forming elements of Si+Nt, which will be described later. However, if C is less than 4%, chromium carbide decreases and graphite crystallization also disappears.
The desired graphite crystallized high chromium cast iron cannot be obtained. On the other hand, if C exceeds 3.4%, it depends on the relationship with the Cr content, but in the case of the present invention, since Cr is suppressed to 10% or less, supersaturated carbon graphitizes due to the high Si and Ni contents. The amount of graphite produced is excessive and wear resistance deteriorates.
Ｓｉ：２．０〜３．４％
Ｓｉは高クロム材質に黒鉛を晶出させるために必要で、
２．０％未満ではこの効果がなく 、３．４％を越えて
は黒鉛品出の過多となり耐摩耗性の点で劣化する。なお
Ｓｉについては鋳込前Ｏ３ｉ量を上記成分範囲よりも低
目にしておいて、鋳込時に接種を行ない、最終製品の成
分で上記範囲内に調整する方が黒鉛の晶出に有効である
。Si: 2.0-3.4% Si is necessary to crystallize graphite in high chromium materials.
If it is less than 2.0%, this effect will not be achieved, and if it exceeds 3.4%, too much graphite will be present and the wear resistance will deteriorate. Regarding Si, it is more effective for graphite crystallization to keep the O3i amount before casting lower than the above component range, perform inoculation at the time of casting, and adjust the final product components to within the above range. .
Ｍｎ ： ０．５〜１．５ ％
Ｍｎは溶湯の脱酸のためにＳｉと共に積極的に添加され
る。Ｍｎ Ｏ，５％未満ではこの効果が不足し、１．５
％を越えては機械的性質特に靭性の点で劣化が著しくな
る。Mn: 0.5-1.5% Mn is actively added together with Si to deoxidize the molten metal. This effect is insufficient when MnO is less than 5%, and 1.5
%, mechanical properties, particularly toughness, will deteriorate significantly.
Ｐ：０．１％以下
Ｐはロール材質においては少ない程望ましく、材質を脆
くするという点から０．１％以下とする。P: 0.1% or less P is preferably as low as possible in the roll material, and from the viewpoint of making the material brittle, it is set to 0.1% or less.
Ｓ ： ０．０８％以下
ＳもＰと同様に少ない程望ましく、やはり材質も脆くす
ることから０．０８％以下とする。S: 0.08% or less Similar to P, the smaller the amount of S, the more desirable it is, and since it also makes the material brittle, it is set to 0.08% or less.
Ｎｉ：４．５〜１０％
Ｎｉは基地組織の改良と黒鉛晶出の目的で積極的に含有
される。しかしてＮｉ ４．５％未満では黒鉛の晶出が
みられず、一方１０％を越えるとＳｉの場合と同様黒鉛
過多となり、同時に残留オーステナイトが増加して後の
熱処理によってもオーステナイトが安定で使用時に耐肌
荒性の面で問題となる。Ni: 4.5 to 10% Ni is actively included for the purpose of improving the matrix structure and crystallizing graphite. However, if Ni is less than 4.5%, no crystallization of graphite is observed, while if it exceeds 10%, there will be an excess of graphite as in the case of Si, and at the same time, residual austenite will increase, and the austenite will remain stable even after subsequent heat treatment and can be used. Sometimes problems arise in terms of skin roughness resistance.
Ｃｒ：５〜１０％
ＣｒはＣと結合してＣｒ炭化物を形成するが、５％未満
では炭化物が少なく耐摩耗性の点で劣り、一方１０％を
越えては上記Ｎｉ、 Ｓｉの成分範囲によっても黒鉛の
晶出が得られない。Cr: 5-10% Cr combines with C to form Cr carbide, but if it is less than 5%, there are few carbides and the wear resistance is inferior, while if it exceeds 10%, it will depend on the above Ni and Si component range. However, graphite crystallization cannot be obtained.
Ｍｏ ： ０．４〜３．０％
Ｍｏは焼入焼戻し抵抗を高めると共に炭化物中に入り、
炭化物硬度を高めると同時に焼戻し軟化抵抗を向上させ
るのに有効であるが、その含有量が０．４％未満ではこ
のような効果が少なく、一方３．０％を越えては白銑化
傾向が強くなって黒鉛の晶出が得られなくなる。本発明
の外殻層は以上の成分のほか残部実質的にＦｅで形成さ
れるが、その材質特性を向上させるためにＦｅに代えて
、下記のＮｂ。Mo: 0.4-3.0% Mo increases the quenching and tempering resistance and enters into the carbide,
It is effective in increasing carbide hardness and simultaneously improving temper softening resistance, but if the content is less than 0.4%, this effect is small, while if it exceeds 3.0%, there is a tendency for whitening. It becomes so strong that it becomes impossible to obtain crystallization of graphite. In addition to the above-mentioned components, the outer shell layer of the present invention is substantially made of Fe, but in order to improve the material properties, the following Nb is used instead of Fe.
■を必要に応じて含有することができる。(2) can be included as necessary.
Ｎｂ、Ｖ：１．０％以下
Ｎｂ、■は共に鋳造組織の微細化に効果があり、必要に
応じ単独又は複合で１．０％以下含有される。Nb, V: 1.0% or less Nb and (2) are both effective in refining the casting structure, and may be contained individually or in combination at 1.0% or less, if necessary.
すなわち、それらが合計量で１．０％を越えて含有され
ると、炭素と結びついてＶＣ，Ｎｂ Ｃ，ＮｂｚＣを形
成し黒鉛の晶出を妨げると共にコスト高となる。That is, if they are contained in a total amount exceeding 1.0%, they combine with carbon to form VC, Nb C, and NbzC, which impede crystallization of graphite and increase costs.
内層に用いる鋼材は、一般に靭性の優れた機械構造用炭
素鋼、構造用合金鋼等の材料から適宜選択できる。特に
、フェライト基地からなる低炭素低合金鋼を用いると、
ＨＩ Ｐ処理に際して、又前記複合素材の焼入に際して
好適である。すなわち、複合素材は外層を耐摩耗性に優
れたものにするために焼入・焼戻し熱処理に供されるが
、内層に前記フェライト基地の低炭素低合金鋼材を使用
すれば、複合素材全体を焼入れても内層には焼入作用が
及ばず、靭性劣化が生じない。もし′、内層に焼入効果
があると、リングロールを軸嵌して組立ロールとする際
、割損を生じ易くなり好ましくない。The steel material used for the inner layer can be appropriately selected from materials such as mechanical structural carbon steel and structural alloy steel, which generally have excellent toughness. In particular, when using low-carbon, low-alloy steel consisting of a ferrite base,
It is suitable for HIP treatment and for hardening the composite material. In other words, the composite material is subjected to quenching and tempering heat treatment to make the outer layer superior in wear resistance, but if the ferrite base low-carbon, low-alloy steel material is used for the inner layer, the entire composite material can be quenched. However, the quenching effect does not reach the inner layer, so no deterioration in toughness occurs. If the inner layer has a hardening effect, it is undesirable because it is likely to cause breakage when the ring roll is fitted into an assembled roll.
複合素材の外層のみを焼入熱処理に供することもできる
が、全体を処理するのに比べて作業が煩雑で生産性の点
で劣る。It is also possible to subject only the outer layer of the composite material to quenching heat treatment, but this is more complicated and less productive than treating the entire composite material.
尚、本発明においては、ＨＩＰ処理する際の顕熱を利用
して、ＨＩＰ後の冷却速度を調整することにより、焼入
れ熱処理を省略することが可能である。例えば、前記黒
鉛晶出高クロム鋳鉄材を外層に使用した場合、通常のＨ
ＩＰ加熱温度（１１００℃〜１１５０℃）でオーステナ
イト化が行なわれ、冷却速度を１００℃／Ｈｒ以上に１
Ｊｊｉ整することで、組織が、二次カーバイドとマルテ
ンサイトとなり、焼□入れ熱処理を省略することもでき
る。しかる後マルテンサイト組織の安定化のために５０
０℃〜５７０℃で１０〜２０１１ ｒの焼戻し熱処理を
行なう。なお、もちろんＨＩＰ処理と熱処理を分けて別
個に処理する事も可能である。In addition, in the present invention, it is possible to omit the quenching heat treatment by adjusting the cooling rate after HIP using sensible heat during HIP treatment. For example, if the graphite crystallized high chromium cast iron material is used for the outer layer, normal H
Austenitization occurs at the IP heating temperature (1100°C to 1150°C), and the cooling rate is increased to 100°C/Hr or higher.
By adjusting Jji, the structure becomes secondary carbide and martensite, and quenching heat treatment can be omitted. 50 to stabilize the martensitic structure.
Tempering heat treatment is performed at 0°C to 570°C for 10 to 2011 r. Note that, of course, it is also possible to separate the HIP treatment and heat treatment and perform them separately.
以上説明した複合リングロール１は、ブロックミルの如
く軸に組立てずにそのまま使用される場合もあるが、第
３図〜第５図に示す如く軸に組立てて組立ロールとして
使用される。The composite ring roll 1 described above may be used as it is without being assembled on a shaft, such as in a block mill, but it may be used as an assembled roll by being assembled on a shaft as shown in FIGS. 3 to 5.
すなわち、第３図の如く、中央部外周に環状凸部２２が
一体的に形成された軸２１に焼ばめ固定したり、又第４
図及び第５図の如く、軸２３に複合リングロール１とス
ペーサーリング２４又は／及び端末リング２５を焼ばめ
て組立ロールとして使用することも可能である。That is, as shown in FIG.
It is also possible to shrink-fit the composite ring roll 1, spacer ring 24 and/or end ring 25 to the shaft 23 and use it as an assembly roll, as shown in FIGS.
尚、複合リングロール１の軸への組立は、圧延機の形式
により複合リングロールを１個としてもよく、又２個以
上としてもよいことは勿論である。It goes without saying that when assembling the composite ring roll 1 to the shaft, one composite ring roll or two or more composite ring rolls may be assembled depending on the type of rolling mill.
更に、軸材は、一般的には強靭で溶接固定が可能な鋼材
を用いるが、圧延荷重が小さい場合、ダクタイル鋳鉄等
の鋳鉄材としてもよいことは勿論である。Further, the shaft material is generally made of a steel material that is strong and can be fixed by welding, but it goes without saying that if the rolling load is small, it may be made of cast iron material such as ductile cast iron.
次に具体的実施例を掲げて説明する。Next, specific examples will be listed and explained.
（実施例）
外径Ｄ＋”φ３３０ｍ１、内径Ｄ３＝φ１６０１、外層
・内層境界径Ｄｚ＝φ２２０龍、幅２００龍の複合リン
グロールの製造実施例。(Example) Example of manufacturing a composite ring roll having an outer diameter D+"φ330m1, an inner diameter D3=φ1601, an outer layer/inner layer boundary diameter Dz=φ220mm, and a width of 200mm.
（１）第１表に示した組成の黒鉛晶出高クロム鋳鉄材及
びＣ： ０．２１％、Ｓｉ ： ０．１１％、Ｍｎ ：
０．３９％、残部実質的Ｆｅの低ＣＫｆ４で、下記寸
法の素材リングを製作した。(1) Graphite crystallized high chromium cast iron material with the composition shown in Table 1 and C: 0.21%, Si: 0.11%, Mn:
A material ring with the following dimensions was manufactured with a low CKf4 of 0.39% and the balance being substantially Fe.
０外層素材リング
Ｄ １ ° ＝ φ ３３５ 、 Ｄ！ ＝
φ ２２０ 、 幅 ２０５１璽０内層素材
リング
Ｄｔ＝φ２２０ 、Ｄ３″＝φ１５５、幅２０５ ｗ第
１表
注 単位 ・ 重■％
残部実質的にＦｅ
（２） 前記外層及び内層素材リングを嵌合して、嵌
合体を封缶して脱気し、圧力２００ｋｇ／ｃｄ、温度１
１００℃でＨＩＰ処理し、両者を拡散接合して複合素材
を得た。0 Outer layer material ring D 1 ° = φ 335, D! =
φ 220, Width 2051mm 0 Inner layer material ring Dt = φ220, D3'' = φ155, Width 205 w Table 1 Note Unit Weight % Remainder substantially Fe (2) Fitting the outer layer and inner layer material rings , the fitted body is sealed and degassed, and the pressure is 200 kg/cd and the temperature is 1.
HIP treatment was performed at 100° C., and the two were diffusion bonded to obtain a composite material.
（３）その後、前記複合素材を荒削りした後、焼入・焼
戻し熱処理を行ない、機械加工により複合リングロール
を得た。製品外層の硬度は、下記の通りであり、内層の
硬度はＨｓ３３であった。(3) Thereafter, the composite material was rough-machined, then subjected to quenching and tempering heat treatment, and a composite ring roll was obtained by machining. The hardness of the outer layer of the product was as follows, and the hardness of the inner layer was Hs33.
実施例１−Ｈｓ ８５ 実施例２−Ｈｓ ８９実
施例３−・＝Ｈｓ ８１ 実施例４−Ｈｓ ８２
（４）前記複合リングロールを各々２個用意し、第３図
の如く軸に焼ばめ固定し、胴長５００ｍ１の棒鋼圧延用
組立ロールを得た。Example 1-Hs 85 Example 2-Hs 89 Example 3-=Hs 81 Example 4-Hs 82
(4) Two of each of the above-mentioned composite ring rolls were prepared and fixed to the shaft by shrink fitting as shown in FIG. 3 to obtain an assembled roll for rolling steel bars with a body length of 500 m1.
（発明の効果）
以上説明した通り、本発明の複合リングロールは、外層
を黒鉛が晶出した高クロム鋳材で形成し、内層を強靭な
鋼材で形成したので、超硬リングロールに比べて安価で
あり、しかも外層に優れた耐摩耗性と耐焼付性を付与す
ることができ、ロール寿命も優れる。(Effects of the Invention) As explained above, the composite ring roll of the present invention has an outer layer made of a high chromium cast material with crystallized graphite, and an inner layer made of a strong steel material. It is inexpensive, can provide the outer layer with excellent wear resistance and seizure resistance, and has excellent roll life.
また、外層と内層とをＨＩ Ｐ処理により拡散接合した
から、高合金材質の外層から内層への高合金成分の混入
を可及的に防止でき、内層の靭性を劣化させることがな
い。Furthermore, since the outer layer and the inner layer are diffusion bonded by HIP processing, it is possible to prevent the high alloy component from entering the inner layer from the outer layer made of a high alloy material as much as possible, and the toughness of the inner layer is not deteriorated.
更にまた、外層と内層との熱膨張係数の差が小さく、拡
散接合面で割れが生じにくい。Furthermore, the difference in thermal expansion coefficient between the outer layer and the inner layer is small, making it difficult for cracks to occur at the diffusion bonded surface.
従って、内層が強靭材で形成されている本発明の複合リ
ングロールを組立ロールに適用すれば、簡単な焼ばめ法
や、溶接、ネジ、ボルト等で軸に低コストで組立てるこ
とができ、しかも軸の再利用が可能となる。Therefore, if the composite ring roll of the present invention whose inner layer is made of a tough material is applied to an assembly roll, it can be assembled to the shaft at low cost by a simple shrink fitting method, welding, screws, bolts, etc. Furthermore, the shaft can be reused.
第１図は本発明に係る複合リングロールの断面図、第２
図（１） ｆ２１は素材リングの断面図、第３図〜第５
図は本発明に係る複合リングロールを適用した組立ロー
ルの一部断面図、第６図は従来のリングロールの断面図
を示す。
ｉ −複合リングロール、２−外層、３−・内層。
第３図
第４図
第６図FIG. 1 is a sectional view of a composite ring roll according to the present invention, and FIG.
Figure (1) f21 is a cross-sectional view of the material ring, Figures 3 to 5
The figure shows a partial sectional view of an assembled roll to which the composite ring roll according to the present invention is applied, and FIG. 6 shows a sectional view of a conventional ring roll. i - Composite ring roll, 2 - outer layer, 3 - inner layer. Figure 3 Figure 4 Figure 6
Claims (2)
と、靭性に優れた鋼材で形成された内層とが熱間静水圧
加圧により拡散接合されていることを特徴とする耐焼付
性に優れた複合リングロール。(1) Seizure resistant, characterized by an outer layer made of high chromium cast iron material with crystallized graphite and an inner layer made of steel material with excellent toughness, which are diffusion bonded by hot isostatic pressing. Composite ring roll with excellent properties.
層はフェライト基地からなる低炭素低合金鋼材で形成さ
れた特許請求の範囲第１項記載の耐焼付性に優れた複合
リングロール。(2) The chemical composition of the outer layer is in weight percent: C: 2.4-3.4% Ni: 4.5-10% Si: 2.0-3.4% Cr: 5-10% Mn: 0. 5 to 1.5% Mo: 0.4 to 3.0% P: 0.1% or less The balance is substantially Fe S: 0.08% or less It is formed of a high chromium cast iron material with crystallized graphite, A composite ring roll with excellent seizure resistance according to claim 1, wherein the inner layer is formed of a low carbon, low alloy steel material comprising a ferrite base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24185786A JPS6397304A (en) | 1986-10-11 | 1986-10-11 | Compound ring roll having excellent seizure resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24185786A JPS6397304A (en) | 1986-10-11 | 1986-10-11 | Compound ring roll having excellent seizure resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6397304A true JPS6397304A (en) | 1988-04-28 |
Family
ID=17080542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24185786A Pending JPS6397304A (en) | 1986-10-11 | 1986-10-11 | Compound ring roll having excellent seizure resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6397304A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04406U (en) * | 1990-04-06 | 1992-01-06 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6116415A (en) * | 1984-06-30 | 1986-01-24 | 株式会社東芝 | Wiring unit |
| JPS61176408A (en) * | 1985-01-31 | 1986-08-08 | Kubota Ltd | Composite ring roll |
-
1986
- 1986-10-11 JP JP24185786A patent/JPS6397304A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6116415A (en) * | 1984-06-30 | 1986-01-24 | 株式会社東芝 | Wiring unit |
| JPS61176408A (en) * | 1985-01-31 | 1986-08-08 | Kubota Ltd | Composite ring roll |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04406U (en) * | 1990-04-06 | 1992-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR0175075B1 (en) | Potor for steam turbine and manufacturing method thereof | |
| JP3273404B2 (en) | Manufacturing method of thick high hardness and high toughness wear resistant steel | |
| US4224060A (en) | Hard alloys | |
| EP0577997A1 (en) | Electrode for electroslag remelting and process of producing alloy using the same | |
| JPH0219181B2 (en) | ||
| JPS6218241B2 (en) | ||
| JPH08100239A (en) | Alloy tool steel | |
| JPH09209073A (en) | Composite sleeve for roll for rolling wide flange shape | |
| JPH0555585B2 (en) | ||
| JPS63199092A (en) | Welded overlay roll for hot rolling | |
| JPH04358046A (en) | High speed steel base sintered alloy | |
| JP3028514B2 (en) | Composite roll for rolling with excellent wear resistance and rough surface resistance | |
| JPS6397304A (en) | Compound ring roll having excellent seizure resistance | |
| KR20000058123A (en) | Heavy wall steel material having superior weldability and method for producing the same | |
| JP2601746B2 (en) | Centrifugal casting sleeve roll and its manufacturing method | |
| JPH0379083B2 (en) | ||
| JPH02285047A (en) | Roll for hot rolling | |
| JPH075934B2 (en) | Composite member having excellent wear resistance, seizure resistance, and rough skin resistance, and method for manufacturing the same | |
| JPS63235092A (en) | Alloy for plasma powder buildup welding and buildup-welded roll for hot rolling | |
| JP2533935B2 (en) | Method for producing high Mn non-magnetic steel having excellent SR embrittlement resistance, high strength and high toughness | |
| JPH0447023B2 (en) | ||
| JP3194207B2 (en) | Covered arc welding rod for high Cr ferritic heat resistant steel | |
| JPH01252704A (en) | Complex member and its manufacture | |
| JPH0379084B2 (en) | ||
| JPH10121186A (en) | Centrifugally cast sleeve roll and its production |