JPH0372378B2 - - Google Patents
Info
- Publication number
- JPH0372378B2 JPH0372378B2 JP58009086A JP908683A JPH0372378B2 JP H0372378 B2 JPH0372378 B2 JP H0372378B2 JP 58009086 A JP58009086 A JP 58009086A JP 908683 A JP908683 A JP 908683A JP H0372378 B2 JPH0372378 B2 JP H0372378B2
- Authority
- JP
- Japan
- Prior art keywords
- outer layer
- casting
- roll
- adamite
- less
- 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
- 238000005266 casting Methods 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 24
- 239000002131 composite material Substances 0.000 claims description 17
- 230000005587 bubbling Effects 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000009750 centrifugal casting Methods 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 229910004709 CaSi Inorganic materials 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 238000007872 degassing Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 17
- 230000007547 defect Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910001567 cementite Inorganic materials 0.000 description 4
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
【発明の詳細な説明】
本発明は、外層を高硬度アダマイト材質、一方
内層を適宜の強靭性に優れる材質で形成する複合
アダマイトロールの製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a composite adamite roll in which the outer layer is formed of a highly hard adamite material and the inner layer is formed of a suitable material with excellent toughness.
一般に、圧延用ロールには図示の如く異材質の
外層（使用層）と内層とを溶着一体化せしめて構
成した複合ロールが多用されている。即ち、第１
図は板圧延用ロールの如くその胴部外層１と内層
（芯材）２とを一体化したもの、また第２図はＨ
型鋼圧延用ロールの如くアーバー３に組立てて使
用される中空ロール（スリーブ）について、これ
を外層１′と内層２′の一体二層構造にしたものを
例示している。 Generally, as shown in the figure, a composite roll is often used as a rolling roll, which is constructed by welding an outer layer (used layer) and an inner layer made of different materials into one piece. That is, the first
The figure shows one in which the body outer layer 1 and inner layer (core material) 2 are integrated like a roll for plate rolling, and the second figure shows H
An example of a hollow roll (sleeve) that is assembled into an arbor 3 and used, such as a roll for rolling shaped steel, has an integral two-layer structure of an outer layer 1' and an inner layer 2'.
ところで、このような複合ロールの外層（使用
層）の材質については、耐摩耗性、耐ヒートクラ
ツク性、耐肌荒性等が要求され、この目的に適合
する好適なものとして、いわゆる高硬度アダマイ
ト材質を用いることが知られている。また一般に
複合ロールの製造手段としては遠心力鋳造による
のが優れているが、特にチヤンネル鋼、Ｈ型鋼の
ような大型の型鋼用中間、仕上スタンドロールに
ついては、使用層全体を均一な組織、硬度を有す
るものに仕上げる必要があるため、遠心力鋳造技
術を応用して高品質のものを得ることが肝要であ
る。 By the way, the material of the outer layer (used layer) of such a composite roll is required to have wear resistance, heat crack resistance, roughness resistance, etc., and a so-called high hardness adamite material is suitable for this purpose. is known to be used. In general, centrifugal casting is an excellent method for manufacturing composite rolls, but especially for intermediate and finishing stand rolls for large steel shapes such as channel steel and H-shaped steel, the entire layer used has a uniform structure and hardness. Therefore, it is important to apply centrifugal force casting technology to obtain high quality products.
しかし乍ら、この遠心力鋳造により製造される
複合アダマイトロールの困難な問題点として、ガ
ス欠陥を発生し易いことがある。すなわち、この
種複合ロールでは、まず後に特定するようなアダ
マイト材質の外層を遠心力鋳造し、しかる後ダク
タイル鋳鉄のような強靭な材質の内層を鋳込み、
両者を溶着一体化せしめて鋳造するのであるが、
その外層の遠心力鋳造にさいしガスによる引巣状
欠陥を発生し易く、これがため製品不良率が高い
（著しくは不良率10％にも達する）という難点が
みられた。 However, a difficult problem with composite adamite rolls manufactured by centrifugal casting is that they are susceptible to gas defects. That is, in this type of composite roll, first an outer layer of adamite material, which will be specified later, is centrifugally cast, and then an inner layer of a strong material such as ductile cast iron is cast.
Both are welded together and cast.
During centrifugal casting of the outer layer, gas-induced nest-like defects are likely to occur, resulting in a high product defect rate (in some cases, the defect rate reaches as high as 10%).
そこで本出願人はこの対策として、先に特公昭
57−13388号公報、特願昭57−134046号にその防
止手段を提案したところである。しかし、これら
の方法によるとかなりの改善効果が認められるも
のの、未だ完全には欠陥発生を防止し得ないのが
実情である。 Therefore, as a countermeasure to this problem, the applicant first
A method for preventing this problem was proposed in Publication No. 57-13388 and Japanese Patent Application No. 57-134046. However, although these methods have shown considerable improvement effects, the reality is that they still cannot completely prevent the occurrence of defects.
本発明はかかる複合アダマイトロールの製造上
の問題点を解決し、その外層には高硬度アダマイ
ト材質本来の良好な使用特性が発揮されると共
に、欠陥のない健全なロールが確実に得られるよ
うにした製造手段を提供する目的でなされたもの
である。 The present invention solves the problems in manufacturing such a composite adamite roll, and ensures that the outer layer exhibits the good usability characteristics inherent to the high hardness adamite material, and that a sound roll without defects is reliably obtained. This was done for the purpose of providing a means of manufacturing.
すなわち本発明は、下記に詳述する特定成分範
囲のアダマイト材の外層と、強靭材からなる内層
とを溶着一体化せしめて構成される複合アダマイ
トロールを鋳造するに当り、その外層の遠心力鋳
造にさいして、鋳込前に外層溶湯を不活性ガスに
よるバブリング処理しておくことを特徴とするも
のである。 That is, in casting a composite adamite roll formed by welding and integrating an outer layer of adamite material having a specific component range as detailed below and an inner layer consisting of a tough material, the invention aims to reduce the centrifugal force of the outer layer. In casting, the outer layer molten metal is subjected to bubbling treatment with an inert gas before casting.
以下本発明について詳述する。本発明に係る複
合ロールは、前述の通り、その外層が耐摩耗性、
耐ヒートクラツク性、耐肌荒性等に優れる高硬度
アダマイト材質から形成されるものである。しか
して本発明が対象としている外層用のアダマイト
材は、その化学成分の範囲が次のものに特定され
る。すなわち、C1.8〜2.6、Si0.2〜1.2、Mn0.4〜
1.5、P0.1以下、S0.1以下、Ni0.5〜3.0、Cr0.5〜
4.0、Mo0.4〜2.0を各重量％含み、残部Feおよび
通常の不純物からなるものである。各成分範囲の
限定理由について述べると次の通りである。 The present invention will be explained in detail below. As mentioned above, the composite roll according to the present invention has a wear-resistant outer layer,
It is made of a highly hard adamite material that has excellent heat crack resistance and roughness resistance. The adamite material for the outer layer, which is the object of the present invention, has the following chemical components. That is, C1.8~2.6, Si0.2~1.2, Mn0.4~
1.5, P0.1 or less, S0.1 or less, Ni0.5~3.0, Cr0.5~
4.0 and Mo0.4 to 2.0% by weight, with the balance consisting of Fe and normal impurities. The reason for limiting the range of each component is as follows.
C1.8〜2.6％
Ｃは共晶セメンタイト（以下単にセメンタイト
という）の量を決定し、ロール特性に大きく影響
を与えると共に、それ自身脱ガス作用をもつもの
である。C1.8％未満ではセメンタイト量が少なく
て、所望の耐摩耗性が発揮できない。一方C2.6％
を超えると耐ヒートクラツク性が劣化すると共
に、高Ｃ％のものとなるためガスによる欠陥が発
生し難くなり、本発明の製造法を適用する必要も
なくなるためである。C 1.8 to 2.6% C determines the amount of eutectic cementite (hereinafter simply referred to as cementite), greatly affects roll characteristics, and has a degassing effect itself. If C is less than 1.8%, the amount of cementite is too small to exhibit the desired wear resistance. On the other hand, C2.6%
This is because, if it exceeds this, the heat crack resistance deteriorates, and since the C% becomes high, defects due to gas are less likely to occur, and there is no need to apply the manufacturing method of the present invention.
Si0.2〜1.2％
Siは脱酸効果を有するが、0.2％未満ではその
効果が期待できず、一方1.2％を超えるとフエラ
イト中に溶け込んだSiが材質の強靭性、耐ヒート
クラツク性を劣化させるためである。Si0.2-1.2% Si has a deoxidizing effect, but if it is less than 0.2%, this effect cannot be expected, while if it exceeds 1.2%, Si dissolved in the ferrite will deteriorate the toughness and heat crack resistance of the material. It's for a reason.
Mn0.4〜1.5％
MnはＳの害を除く効果を発揮し、耐摩耗性向
上のために0.4％以上は必要であるが、1.5％を超
えると硬くなり過ぎると共に焼戻し脆性が現わ
れ、耐ヒートクラツク性の面で問題となるためで
ある。Mn0.4-1.5% Mn has the effect of removing the harmful effects of S, and 0.4% or more is necessary to improve wear resistance, but if it exceeds 1.5%, it becomes too hard and temper brittleness appears, making it difficult to resist heat cracks. This is because it poses a problem in terms of sexuality.
P0.1％以下
Ｐは溶湯の流動性を増し耐摩耗性を付与する元
素であるが、材質の強靭性を大きく劣化し、耐ヒ
ートクラツク性に問題を来たすため少ない程望ま
しく、0.1％以下とする。P0.1% or less P is an element that increases the fluidity of the molten metal and imparts wear resistance, but it greatly deteriorates the toughness of the material and causes problems in heat crack resistance, so it is desirable to have as little as possible, and it should be 0.1% or less. .
S0.1％以下
ＳもＰと同様に材質を脆弱にするため0.1％以
下とする。S 0.1% or less Like P, S also makes the material brittle, so it should be 0.1% or less.
Ni0.5〜3.0％
NiはA1変態を遅らせ、基地硬度を上げるため、
耐摩耗性向上に効果がある。0.5％未満ではその
効果が少なく、一方3.0％を超えると硬く、脆く
なり易く耐ヒートクラツク性が劣化すると共に、
未変態組織が残り易く耐肌荒性が劣化し、好まし
くないためである。Ni0.5~3.0% Ni delays A1 transformation and increases base hardness;
Effective in improving wear resistance. If it is less than 0.5%, the effect will be small, while if it exceeds 3.0%, it will become hard and brittle, and the heat crack resistance will deteriorate.
This is because untransformed structures tend to remain and the roughness resistance deteriorates, which is not preferable.
Cr0.5〜4.0％
Crはセメンタイトの安定化と基地の耐摩耗性
向上の効果を得るために0.5％以上は必要である
が、4.0％を超えると鋳造割れを発生し易くなる
と共に耐ヒートクラツク性が劣化するためであ
る。Cr0.5-4.0% Cr is required at 0.5% or more to stabilize cementite and improve the wear resistance of the base, but if it exceeds 4.0%, casting cracks are likely to occur and heat crack resistance is reduced. This is because it deteriorates.
Mo0.4〜2.0％
MoはNiと同様な作用があり、硬度、耐摩耗性
の向上の効果を得るために0.4％以上、また耐ヒ
ートクラツク性、耐肌荒性の面で問題を生じさせ
ないため2.0％以下とする。Mo0.4-2.0% Mo has the same effect as Ni, and should be 0.4% or more to obtain the effect of improving hardness and wear resistance, and because it does not cause problems in terms of heat crack resistance and roughness resistance. 2.0% or less.
本発明の対象とする外層の高硬度アダマイト材
質は以上の通りであるが、一方内層材質について
は、ロールネツク部の折損やそのスリーブ割損の
問題に対する強度の必要性に応じて、高級鋳鉄、
ダクタイル鋳鉄又は黒鉛鋼のような強靭材が選択
使用される。 The high-hardness adamite material for the outer layer that is the object of the present invention is as described above, while the inner layer material may be made of high-grade cast iron, high-grade cast iron,
Tough materials such as ductile iron or graphite steel are selected.
しかして上記のような外層材質を遠心力鋳造す
れば、前述の通り、ガス欠陥（通常約１mmφ程度
の微小巣）を発生し易く、仮にこのようなものを
そのまま使用した場合では、圧延材に欠陥が転写
されるためその防止が必要とされる。そこで、本
発明はこの目的を達成するため、外層の遠心力鋳
造にさいして、その鋳込前に予め外層溶湯にAr
ガスのような不活性ガスによるバブリング処理を
実施しておくのである。 However, if the above-mentioned outer layer material is centrifugally cast, gas defects (usually microscopic cavities of about 1 mm diameter) are likely to occur, and if such materials are used as is, they will cause problems in the rolled material. Since defects are transferred, prevention is required. Therefore, in order to achieve this object, the present invention, in performing centrifugal force casting of the outer layer, preliminarily applies Ar to the outer layer molten metal before casting.
Bubbling treatment using an inert gas such as gas is carried out.
このガスバブリング処理の好適な実施条件を掲
げれば、次の通りである。 Preferred conditions for carrying out this gas bubbling treatment are as follows.
圧力 ２〜10Kg/cm2
流量 30〜200/min
時間 ５〜60sec／溶湯１トン
また処理は通常出銑後取鍋中で行ない、そのさ
い処理温度は、Ｃ含有量にもよるが、1380〜1520
℃程度が良好である。 Pressure: 2~10Kg/ cm2 Flow rate: 30~200/min Time: 5~60sec/1 ton of molten metal Treatment is usually carried out in a ladle after tapping, and the treatment temperature varies from 1380 to 1380, depending on the C content. 1520
℃ is good.
このようなバブリング処理によると、溶湯中の
ガス含有量が減少され、鋳造時におけるガス欠陥
の発生を未然に防止することができるが、さらに
完全を期するならば、特願昭57−134046号に示し
た如く、CaSiの添加を併用することもできる。
すなわち、外層溶湯の鋳込直前又は鋳込途中に
CaSiをCa分として0.01〜0.2重量％添加するので
ある。 According to such bubbling treatment, the gas content in the molten metal is reduced and the occurrence of gas defects during casting can be prevented. As shown in , addition of CaSi can also be used in combination.
In other words, immediately before or during the casting of the outer layer molten metal,
CaSi is added in an amount of 0.01 to 0.2% by weight as Ca content.
また脱ガス剤として、その他Ti、Al、Zrが一
般に知られているが、外層鋳込みに際してはこれ
らを併用添加することができ、その場合にはより
完全な鋳造欠陥防止効果が得られるものと期待さ
れる。但し、これらの元素は反面溶湯の流動性を
悪化させるため、単独又は複合添加による合計含
有量は0.1重量％以下に抑えられるべきである。 In addition, Ti, Al, and Zr are generally known as degassing agents, and these can be added together when casting the outer layer, and in that case, it is expected that a more complete effect of preventing casting defects will be obtained. be done. However, since these elements deteriorate the fluidity of the molten metal, the total content of these elements, either singly or in combination, should be suppressed to 0.1% by weight or less.
このように外層の遠心力鋳造時に不活性ガスに
よるバブリング処理して製造された複合アダマイ
トロールでは、そのガス欠陥防止効果が完全に発
揮されることが実成績により確認されている。 It has been confirmed through actual results that the composite adamite roll manufactured by performing bubbling treatment with an inert gas during centrifugal casting of the outer layer fully exhibits its gas defect prevention effect.
本発明の複合アダマイトロールの製造法におい
ては、上記外層鋳造後は従前通りの方法に従つて
行われる。すなわち、外層を遠心力鋳造（水平
型、傾斜型、竪型のいずれも可）した後、適宜タ
イミングで内層を引続き遠心力鋳造又は静置鋳造
により鋳込み、これによつて外内層を溶着一体化
せしめた所期目的の複合ロールを鋳造するのであ
る。なお傾斜型もしくは竪型遠心力鋳造による場
合では、内層の静置鋳造に当つては金型の回転停
止移行中から内層の鋳込みを開始することもでき
る。 In the method for manufacturing a composite adamite roll of the present invention, the casting of the outer layer is carried out according to the conventional method. In other words, after the outer layer is centrifugally cast (horizontal, inclined, or vertical types are acceptable), the inner layer is subsequently cast using centrifugal force casting or static casting at an appropriate timing, thereby welding the outer and inner layers together. A composite roll for the desired purpose is cast. In the case of inclined or vertical centrifugal force casting, when statically casting the inner layer, it is also possible to start casting the inner layer while the mold is in the process of stopping rotation.
また本発明の対象としている複合アダマイトロ
ールの熱処理については、鋳造後、強靭性、耐摩
耗性、耐肌荒性の向上のために、オーステナイト
域まで昇温する熱処理と、それに付随するA1変
態温度以下での焼戻し、歪取り熱処理を行うのが
よい。 Furthermore, regarding the heat treatment of the composite adamite roll, which is the object of the present invention, after casting, heat treatment is performed to raise the temperature to the austenite region and the accompanying A 1 It is preferable to perform tempering and strain relief heat treatment below the transformation temperature.
次に本発明の具体的な実施成績例を掲げて、そ
の効果を明らかにする。 Next, specific practical examples of the present invention will be presented to clarify its effects.
下記の三通りの処理条件で外層溶湯をバブリン
グ処理した18本の複合ロール鋳造成績によると、
いずれもガス欠陥の発生は皆無であつた。 According to the casting results of 18 composite rolls in which the outer layer molten metal was bubbled under the following three processing conditions:
In all cases, no gas defects occurred.
処理条件１ 鋳込肉厚80mm未満の場合
Arガスバブリングのみ
処理条件２ 鋳込肉厚80〜120mmの場合
Arガスバブリング＋Ti、Al、Zrの
単、複添加
処理条件３ 鋳込肉厚120mm以上
Arガスバブリング＋CaSi添加＋Ti、
Al、Zrの単、複添加
なお、Arガスに代えてN2ガスを使用しても、
同様な効果が得られるものと予測される。 Processing condition 1: For casting thickness less than 80 mm, Ar gas bubbling only. Processing condition 2: For casting thickness 80 to 120 mm, Ar gas bubbling + single or multiple addition of Ti, Al, and Zr. Processing condition 3: Casting thickness 120 mm or more, Ar. Gas bubbling + CaSi addition + Ti,
Single or double addition of Al and Zr.Also, even if N2 gas is used instead of Ar gas,
It is expected that similar effects will be obtained.
以上のように、本発明は複合アダマイトロール
の鋳造に当り、高硬度アダマイト材質からなるそ
の外層の遠心力鋳造にさいしてこれを不活性ガス
によるバブリング処理するものであるから、外層
溶湯中のガス含有量を減少せしめることができ、
この種ロールにおいて従来頻発していたガス欠陥
の問題を的確かつ完全に解消することができる。
なおバブリング処理に伴う撹拌作用により、外層
には非金属介在物が浮上分離される等、健全性の
向上にも有効な改善効果が期待できる。 As described above, in casting a composite adamite roll, the present invention involves bubbling the outer layer with an inert gas during centrifugal force casting of the outer layer made of a high hardness adamite material. can reduce gas content,
The problem of gas defects that conventionally frequently occurred in this type of roll can be accurately and completely eliminated.
In addition, due to the stirring action accompanying the bubbling process, non-metallic inclusions are floated and separated in the outer layer, and an effective improvement effect can be expected to improve the soundness.
第１図と第２図は、複合アダマイトロールの構
造例を現わす半分断面図である。
１，１′…外層、２，２′…内層、３…アーバ
ー。
FIGS. 1 and 2 are half sectional views showing an example of the structure of a composite adamite roll. 1, 1'...outer layer, 2, 2'...inner layer, 3...arbor.
Claims (1)
下、S0.1以下、Ni0.5〜3.0、Cr0.5〜4.0、Mo0.4
〜2.0を各重量％含み、残部Feおよび通常の不純
物からなるアダマイト材の外層と、強靭材からな
る内層とを溶着一体化せしめたロールを鋳造する
に当り、前記外層の遠心力鋳造にさいして、その
鋳込前に外層溶湯を不活性ガスによるバブリング
処理しておくことを特徴とする複合アダマイトロ
ールの製造法。 ２ 外層の遠心力鋳造にさいし、外層溶湯にその
鋳込直前又は鋳込途中にCaSiをCa分として0.01
〜0.2重量％添加する特許請求の範囲第１項記載
の製造法。 ３ 外層の遠心力鋳造にさいし、外層溶湯の脱ガ
ス剤としてTi、Al、Zrの一種又は二種以上を合
計含有量で0.1重量％以下添加する特許請求の範
囲第１項又は第２項記載の製造法。[Claims] 1 C1.8-2.6, Si0.2-1.2, Mn0.4-1.5, P0.1 or less, S0.1 or less, Ni0.5-3.0, Cr0.5-4.0, Mo0.4
When casting a roll in which an outer layer of adamite material containing up to 2.0% by weight and the balance consisting of Fe and normal impurities is welded and integrated with an inner layer of tough material, during centrifugal force casting of the outer layer. , A method for producing a composite adamite roll, characterized in that the outer layer molten metal is subjected to bubbling treatment with an inert gas before casting. 2. When centrifugally casting the outer layer, CaSi is added to the outer layer molten metal by 0.01 as a Ca content immediately before or during casting.
The manufacturing method according to claim 1, wherein ~0.2% by weight is added. 3. Claims 1 or 2 include adding one or more of Ti, Al, and Zr as a degassing agent for the outer layer molten metal in a total content of 0.1% by weight or less during centrifugal casting of the outer layer. manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP908683A JPS59133961A (en) | 1983-01-21 | 1983-01-21 | Production of composite adamite roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP908683A JPS59133961A (en) | 1983-01-21 | 1983-01-21 | Production of composite adamite roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59133961A JPS59133961A (en) | 1984-08-01 |
| JPH0372378B2 true JPH0372378B2 (en) | 1991-11-18 |
Family
ID=11710801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP908683A Granted JPS59133961A (en) | 1983-01-21 | 1983-01-21 | Production of composite adamite roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59133961A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155257A (en) * | 2005-12-07 | 2007-06-21 | Matsushita Electric Ind Co Ltd | Heat pump water heater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50131807A (en) * | 1974-03-29 | 1975-10-18 | ||
| JPS5217810A (en) * | 1975-07-31 | 1977-02-10 | Matsushita Electric Ind Co Ltd | Magnetic head with thin coat of film |
| JPS5713388A (en) * | 1980-06-27 | 1982-01-23 | Sharp Corp | Sound watch |
| JPS5735661A (en) * | 1980-08-09 | 1982-02-26 | Kubota Ltd | Composite sleeve roll for rolling wide flange beam and its manufacture |
-
1983
- 1983-01-21 JP JP908683A patent/JPS59133961A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50131807A (en) * | 1974-03-29 | 1975-10-18 | ||
| JPS5217810A (en) * | 1975-07-31 | 1977-02-10 | Matsushita Electric Ind Co Ltd | Magnetic head with thin coat of film |
| JPS5713388A (en) * | 1980-06-27 | 1982-01-23 | Sharp Corp | Sound watch |
| JPS5735661A (en) * | 1980-08-09 | 1982-02-26 | Kubota Ltd | Composite sleeve roll for rolling wide flange beam and its manufacture |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59133961A (en) | 1984-08-01 |
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