JPH07108371A - Manufacture of composite two-layer material - Google Patents
Manufacture of composite two-layer materialInfo
- Publication number
- JPH07108371A JPH07108371A JP25614493A JP25614493A JPH07108371A JP H07108371 A JPH07108371 A JP H07108371A JP 25614493 A JP25614493 A JP 25614493A JP 25614493 A JP25614493 A JP 25614493A JP H07108371 A JPH07108371 A JP H07108371A
- Authority
- JP
- Japan
- Prior art keywords
- alloy material
- hypereutectic
- layer
- mold
- 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.)
- Granted
Links
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- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、遠心鋳造法を適用した
耐熱・耐蝕・耐摩耗複合２層材料の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a heat-resistant / corrosion-resistant / wear-resistant composite two-layer material using a centrifugal casting method.
【０００２】[0002]
【従来の技術】たとえば、圧延用ロール、ローラー、マ
ッドポンプライナー、高温排気管、ボイラーチューブな
ど耐熱・耐蝕・耐摩耗複合管材などの耐熱・耐蝕・耐摩
耗複合材料の製造方法に関し、近年種々の方法が実用化
されてきている。その代表的な方法を例示すると大きく
は、ダブルポア法、遠心成形法、表面改質法があ
げられる。2. Description of the Related Art For example, in recent years, there have been various methods for producing heat-resistant, corrosion-resistant and wear-resistant composite materials such as heat-resistant, corrosion-resistant and wear-resistant composite pipe materials such as rolling rolls, rollers, mud pump liners, high temperature exhaust pipes and boiler tubes. Methods have been put to practical use. Typical examples of such methods include a double pore method, a centrifugal molding method, and a surface modification method.
【０００３】ダブルポア法は、たとえば圧延用ロール、
マッドポンプライナーなどによく使用されており、その
特徴とするところは、外周部に高硬度材料、中心部に高
靭性材料を用いて両者を溶融接合する方法であるため金
属と金属との複合化には、好適な方法である。しかしな
がら金属と非金属との複合化においては、非金属材料の
溶融が難しくそのため高クロム鋳鉄と球状黒鉛鋳鉄の複
合化など実用化に限りがある。The double pore method is, for example, a rolling roll,
It is often used for mud pump liners, etc., and its characteristic is that it is a method of melting and joining both by using a high hardness material in the outer peripheral part and a high toughness material in the center part, so it is a composite of metal and metal Is the preferred method. However, since it is difficult to melt the non-metallic material in the compounding of the metal and the non-metal, the practical application such as the compounding of the high chromium cast iron and the spheroidal graphite cast iron is limited.
【０００４】遠心成形法は、たとえばセラミックロール
などによく使用されており、その特徴とするところは、
金属または非金属層の非焼結粉体を円筒状に成形するも
のであるため金属と金属および金属と非金属との複合化
には、好適な方法である。しかしながら金属と非金属と
の複合化には、焼結温度が２層の材料において、同一で
ある必要があるが現実に、このような複合材料は、乏し
く、そのため前述のとおりセラミックロールの複合化な
ど実用化に限りがある。The centrifugal molding method is often used for, for example, ceramic rolls, and its characteristic features are:
Since the non-sintered powder of the metal or non-metal layer is formed into a cylindrical shape, it is a suitable method for compounding metal and metal and metal and non-metal. However, for the composite of metal and non-metal, the sintering temperature needs to be the same in the two-layer material, but in reality, such composite material is scarce, and as described above, the composite of ceramic rolls is used. There are limits to practical application.
【０００５】表面改質法は、たとえば普通鋼管の外周部
にステンレス鋼を肉盛するなどによく使用されており、
その特徴とするところは、基本的に肉盛であるため金属
と金属との複合化には、好適な方法である。しかしなが
ら母材をまず製造し、その後肉盛材をコーティングする
など、製造工程が多く、その分コスト高、製造期間が多
くなり大物品、量産品などへは適さず、そのため前記の
用途のように適用が限られたものであり、現在幅広く実
用化に至っていない。The surface modification method is often used, for example, for overlaying stainless steel on the outer peripheral portion of an ordinary steel pipe.
Since the feature thereof is basically the overlay, it is a suitable method for compounding metal and metal. However, there are many manufacturing processes, such as first manufacturing the base material and then coating the build-up material, so the cost is high and the manufacturing period is long, so it is not suitable for large articles, mass-produced products, etc. Its application is limited, and it has not been widely put into practical use at present.
【０００６】[0006]
【発明が解決しようとする課題】従って、前記の方法に
おいては、たとえば、圧延搬送用ロール、ローラーなど
大物、量産、且つ過酷な耐熱・耐蝕・耐摩耗の条件を具
備必要とするものにおいては、いずれも適さない。要約
すると、ダブルポア法は、特に金属と非金属との複合化
の点で実用化が難しくまた、遠心成形法は、特に２つの
材料の選定の点で実用化が難しくさらに、表面改質法
は、特に製造コスト、期間の点で実用化が難しい。Therefore, in the above-mentioned method, for example, in the case of large rolls for rolls and rollers, mass production, and those requiring severe heat resistance, corrosion resistance and wear resistance, Neither is suitable. In summary, the double-pore method is difficult to put into practical use, particularly in terms of compounding metal and non-metal, and the centrifugal molding method is difficult to put into practice, especially in terms of selecting two materials. Especially, it is difficult to put into practical use in terms of manufacturing cost and period.
【０００７】[0007]
【課題を解決するための手段】前記の課題を解決するた
めに、本発明は、回転する鋳型に、溶融した過共晶合金
材料を投入し、前記回転鋳型による遠心力により、前記
過共晶合金材料中の初晶の金属化合物を分離し鋳型の外
壁に形成せしめ、残部の過共晶または共晶合金材料が所
定の肉厚に凝固の後に、前記回転する鋳型に、溶融した
亜共晶合金材料または純金属に近い材料を投入し、内層
に高靭性材料を、外層に高硬度・耐摩耗性材料の２層材
料を形成することを特徴とする。In order to solve the above-mentioned problems, according to the present invention, a molten hypereutectic alloy material is charged into a rotating mold, and the hypereutectic crystal is rotated by centrifugal force generated by the rotating mold. The primary metal compound in the alloy material is separated and formed on the outer wall of the mold, and after the remaining hypereutectic or eutectic alloy material solidifies to a predetermined thickness, the rotating mold melts the hypoeutectic crystal. It is characterized in that an alloy material or a material close to a pure metal is added, and a two-layer material of a high toughness material is formed in the inner layer and a high hardness / abrasion resistant material is formed in the outer layer.
【０００８】ここで、回転する鋳型に当初投入する溶融
した過共晶合金材料としては、たとえば耐熱・耐蝕・耐
摩耗の特性を有するものであればよく、従って、実施例
の表に示す過共晶系の合金材料などが好ましい。Here, the molten hypereutectic alloy material initially charged into the rotating mold may be any one having, for example, heat resistance, corrosion resistance and wear resistance. Crystalline alloy materials and the like are preferable.
【０００９】また、次に投入する亜共晶合金材料または
純金属に近い材料としては、たとえば高靭性などの特性
を有するものであればよく、従って、実施例の表に示す
亜共晶系の合金材料などが好ましい。Further, a hypoeutectic alloy material or a material close to pure metal to be added next may be one having characteristics such as high toughness. Therefore, the hypoeutectic alloy material shown in the table of Examples is used. Alloy materials and the like are preferable.
【００１０】さらに、前記溶融した過共晶合金材料から
晶出する初晶の金属化合物の形成厚みを厚くする場合に
は、後から鋳造する亜共晶合金材料または純金属に近い
材料の鋳造時期を遅らせればよい。また、前記内層、外
層との境界部は、金属同士の混合によるため極めてよい
溶着性を呈す。Further, when increasing the formation thickness of the primary crystal metal compound crystallized from the molten hypereutectic alloy material, the timing of casting the hypoeutectic alloy material or a material close to pure metal to be cast later. Should be delayed. In addition, the boundary between the inner layer and the outer layer exhibits extremely good weldability because the metals are mixed with each other.
【００１１】[0011]
【作用】図２および図３に示すように、溶融した過共晶
合金材料は、金型に鋳造されると温度が低下し、初晶と
して、硬い金属の化合物を晶出する。これを金型の回転
に伴う遠心力および非定常流圧により金型の壁側に分離
し外側に硬い金属の化合物の外層が形成される。As shown in FIGS. 2 and 3, the melted hypereutectic alloy material lowers in temperature when cast in a mold and crystallizes a hard metal compound as a primary crystal. This is separated to the wall side of the mold by centrifugal force and unsteady flow pressure accompanying the rotation of the mold, and an outer layer of a hard metal compound is formed on the outside.
【００１２】一方、反壁側に位置する残りの過共晶合金
材料は、そのままでは、脆いため前記溶融した過共晶合
金材料が金型内で所定の肉厚まで凝固した後に、亜共晶
合金材料または、純金属に近い材料を前記金型に鋳造す
る。On the other hand, the remaining hypereutectic alloy material located on the side opposite to the wall is brittle as it is, and thus the molten hypereutectic alloy material is solidified in the mold to a predetermined wall thickness, and then the hypoeutectic alloy is formed. An alloy material or a material close to pure metal is cast in the mold.
【００１３】これにより、前記未凝固の過共晶合金材料
は、亜共晶合金材料または、純金属に近い材料と混合・
希釈され、結果的には、亜共晶または、純金属に近い材
料となり靭性が向上する。従って、外層に硬い金属の化
合物の材料が、内層に靭性の高い材料の２層が形成され
る。また、内外層の境界は、完全に溶着した強度の高い
ものとなる。As a result, the unsolidified hypereutectic alloy material is mixed with a hypoeutectic alloy material or a material close to pure metal.
It is diluted, and as a result, it becomes a hypoeutectic or a material close to a pure metal, and the toughness is improved. Therefore, a hard metal compound material is formed in the outer layer and two tough materials are formed in the inner layer. Moreover, the boundary between the inner and outer layers is completely welded and has high strength.
【００１４】[0014]
【実施例】図１に本発明の製造方法でつくった１例で、
製紙用のロールの断面図を示す。１は、回転する鋳型
で、２は、回転する鋳型に当初に投入する溶融した過共
晶合金材料を示す。EXAMPLE FIG. 1 shows an example produced by the manufacturing method of the present invention.
A sectional view of a roll for papermaking is shown. Reference numeral 1 is a rotating mold, and 2 is a molten hypereutectic alloy material initially charged into the rotating mold.
【００１５】略７２０回転／分間する竪型の鋳型に、約
１７００℃の鉄−炭素系の材料からなる溶湯状態の過共
晶合金材料を重量で約３００kgを投入した。その後、約
５分間前記鋳型の回転を続けると、前記溶湯状態の過共
晶合金材料から晶出する金属化合物３が遠心力にて鋳型
の内壁に移動し、略凝固され、残りの過共晶合金材料
は、未だ未凝固であった。About 300 kg by weight of a hypereutectic alloy material in a molten state consisting of an iron-carbon material at about 1700 ° C. was charged into a vertical mold at about 720 rotations / minute. Then, when the mold is continuously rotated for about 5 minutes, the metal compound 3 crystallized from the hypereutectic alloy material in the molten state is moved to the inner wall of the mold by centrifugal force and is substantially solidified, and the remaining hypereutectic The alloy material was still unsolidified.
【００１６】その後、直ちに前記の回転する鋳型に、次
の溶湯状態の亜共晶合金材料４である鋼系の材料を約１
７００℃で約３００kg投入し、約１２０分間の回転の
後、鋳型の回転を停止した。その後、約６００分間の冷
却時間の経過の後、鋳型から取り出し円筒状の複合２層
材料を形成した。Immediately thereafter, about 1 part of the next steel-based material, which is the hypoeutectic alloy material 4 in the molten state, is added to the rotating mold.
About 300 kg was charged at 700 ° C., and after the rotation for about 120 minutes, the rotation of the mold was stopped. Then, after a cooling time of about 600 minutes, it was taken out from the mold to form a cylindrical composite two-layer material.
【００１７】その後、長手方向の数箇所を円筒状に切断
し、接合状況を目視にてチェックしたところいずれも内
層と外層との接合は、溶け込みが十分で、完全に溶着し
ているのを確認した。また、内層および外層ともに外部
および内部の形状は、巣などのない良好な肌を有してい
た。After that, several places in the longitudinal direction were cut into a cylindrical shape, and the state of joining was visually checked, and it was confirmed that the inner layer and the outer layer were completely welded and completely welded. did. The outer and inner shapes of both the inner layer and the outer layer had good skin without cavities.
【００１８】なお、本実施例においては、製紙用のロー
ルについての実施例を示したが、本発明の適用対象は、
これに限られるものではなく、たとえば表１に示すよう
に等幅広く適用可能である。In this embodiment, the paper making roll is shown as an embodiment, but the present invention is applicable to the following:
The present invention is not limited to this, and can be widely applied, for example, as shown in Table 1.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】本発明により得られる効果は次の通りで
ある。 大物・量産、且つ耐熱・耐蝕・耐摩耗を有する具備特
性を有する複合２層材を単純な工程で低コストに短時間
で製造できる。 内，外層の材料を適宜選定することにより所用の必要
具備特性を使い分けることができ、低コストで機能面の
すぐれた材料となる。The effects obtained by the present invention are as follows. A large-scale, mass-produced, two-layer composite material having heat resistance, corrosion resistance, and wear resistance, which has the characteristics of being equipped, can be manufactured in a simple process at low cost and in a short time. By appropriately selecting the materials for the inner and outer layers, it is possible to use the necessary required characteristics properly and it becomes a material with low cost and excellent functional aspects.
【図１】本発明の方法でつくった製紙用ロールの複合２
層材の断面図。FIG. 1 is a composite 2 of papermaking rolls made by the method of the present invention.
Sectional drawing of a layer material.
【図２】本発明の方法の実施例。FIG. 2 is an example of the method of the present invention.
【図３】本発明の方法の実施例。FIG. 3 is an example of the method of the present invention.
Claims (1)
料を投入し、前記回転鋳型による遠心力により、前記過
共晶合金材料中の初晶の金属化合物を分離し鋳型の外壁
に形成せしめ、残部の過共晶または共晶合金材料が所定
の肉厚に凝固の後に、前記回転する鋳型に、溶融した亜
共晶合金材料または純金属に近い材料を投入し、内層に
高靭性材料を、外層に高硬度・耐摩耗性材料の２層材料
を形成することを特徴とする複合２層材料の製造方法。1. The molten hypereutectic alloy material is charged into a rotating mold, and the primary crystal metal compound in the hypereutectic alloy material is separated by the centrifugal force of the rotating mold to form on the outer wall of the mold. After the remaining hypereutectic or eutectic alloy material has solidified to a predetermined thickness, the rotating mold is charged with a molten hypoeutectic alloy material or a material close to pure metal, and a high toughness material is used for the inner layer. And a method for producing a composite two-layer material, which comprises forming a two-layer material of high hardness and wear resistance material on the outer layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25614493A JP2781717B2 (en) | 1993-10-13 | 1993-10-13 | Method for producing composite two-layer material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25614493A JP2781717B2 (en) | 1993-10-13 | 1993-10-13 | Method for producing composite two-layer material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07108371A true JPH07108371A (en) | 1995-04-25 |
| JP2781717B2 JP2781717B2 (en) | 1998-07-30 |
Family
ID=17288517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25614493A Expired - Lifetime JP2781717B2 (en) | 1993-10-13 | 1993-10-13 | Method for producing composite two-layer material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2781717B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387377C (en) * | 2006-09-01 | 2008-05-14 | 石家庄中煤装备制造有限公司 | Manufacturing technique of double-flange spheroidal graphite cast-iron pipe |
| EP2981374A4 (en) * | 2013-04-05 | 2016-10-05 | Caterpillar Inc | Method of casting |
| JP2017185545A (en) * | 2016-04-01 | 2017-10-12 | エスエムエス グループ ゲーエムベーハー | Method and system for production of seamless hot-rolled tube as well as rolled centrifugally cast tube and use of hollow block produced by means of centrifugal casting |
-
1993
- 1993-10-13 JP JP25614493A patent/JP2781717B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387377C (en) * | 2006-09-01 | 2008-05-14 | 石家庄中煤装备制造有限公司 | Manufacturing technique of double-flange spheroidal graphite cast-iron pipe |
| EP2981374A4 (en) * | 2013-04-05 | 2016-10-05 | Caterpillar Inc | Method of casting |
| US9522425B2 (en) | 2013-04-05 | 2016-12-20 | Caterpillar Inc. | Method of casting |
| JP2017185545A (en) * | 2016-04-01 | 2017-10-12 | エスエムエス グループ ゲーエムベーハー | Method and system for production of seamless hot-rolled tube as well as rolled centrifugally cast tube and use of hollow block produced by means of centrifugal casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2781717B2 (en) | 1998-07-30 |
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