JPH0417970A - Method for casting cylindrical composite casting - Google Patents
Method for casting cylindrical composite castingInfo
- Publication number
- JPH0417970A JPH0417970A JP12359790A JP12359790A JPH0417970A JP H0417970 A JPH0417970 A JP H0417970A JP 12359790 A JP12359790 A JP 12359790A JP 12359790 A JP12359790 A JP 12359790A JP H0417970 A JPH0417970 A JP H0417970A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- outer layer
- flux
- molten metal
- cast
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002131 composite material Substances 0.000 title claims abstract description 12
- 230000004907 flux Effects 0.000 claims abstract description 56
- 229910052751 metal Inorganic materials 0.000 claims abstract description 52
- 239000002184 metal Substances 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 229910021538 borax Inorganic materials 0.000 description 3
- 238000009750 centrifugal casting Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 235000017550 sodium carbonate Nutrition 0.000 description 3
- 239000004328 sodium tetraborate Substances 0.000 description 3
- 235000010339 sodium tetraborate Nutrition 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はロールやローラ等の円筒状鋳物の鋳造方法に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for casting cylindrical castings such as rolls and rollers.
（従来の技術）
圧延使用層たる外層を耐摩耗性や耐焼付性等に優れた高
合金材で形成し、外層の内面に強靭材で形成した内層を
溶着した複合ロールは、通常、外層を遠心力鋳造し、該
外層を内存した遠心力鋳造用金型を起立させて静置鋳造
鋳型を構成し、その内部に内層溶湯を鋳込むことにより
鋳造形成される。(Prior art) Composite rolls have an outer layer used for rolling made of a high-alloy material with excellent wear resistance and seizure resistance, and an inner layer made of a tough material welded to the inner surface of the outer layer. Casting is performed by performing centrifugal force casting, standing up a centrifugal force casting mold containing the outer layer to form a stationary casting mold, and pouring the inner layer molten metal into the mold.
第１図は外層鋳造用の遠心力鋳造装置を示しており、取
鍋１内の外層溶湯２は、遠心力鋳造用金型３の内部に挿
脱自在とされた注湯樋４を介して鋳込まれる。５は金型
回転用ローラ、６は湯止め用ハンドであり、本例では取
鍋１および注湯樋４は移動台車７に取り付けられている
。８は取鍋１を傾動させるためのシリンダである。FIG. 1 shows a centrifugal force casting device for outer layer casting, in which the outer layer molten metal 2 in a ladle 1 is poured into a centrifugal force casting mold 3 through a pouring channel 4 which can be freely inserted and removed. to be molded. Reference numeral 5 indicates a roller for rotating the mold, and reference numeral 6 indicates a hand for stopping the hot water. In this example, the ladle 1 and the pouring gutter 4 are attached to a movable cart 7. 8 is a cylinder for tilting the ladle 1.
外層を遠心力鋳造する際、外層の内面を溶融したフラッ
クスで覆うことにより、内層との接合面である外層内面
の酸化防止、保温を図り、もって内層の溶着を容易にす
ると共に溶着部の健全性を確保することが行われている
。When centrifugally casting the outer layer, by covering the inner surface of the outer layer with molten flux, the inner surface of the outer layer, which is the joint surface with the inner layer, is prevented from oxidation and kept warm, thereby facilitating welding of the inner layer and maintaining the soundness of the welded part. Efforts are being made to ensure sex.
フラックスとしては、ソーダ灰、ケイ砂、ホウ砂等が単
独であるいは混合調整して使用される。As the flux, soda ash, silica sand, borax, etc. are used alone or in a mixed manner.
フラックスの添加は、外層溶湯を鋳込む際、例えば注湯
樋４の注湯口９において、注入された溶湯流上に添加し
たり、外層鋳造後、その内面に人力により、あるいはキ
ャリヤガスと共に散布されるのが通例である。When pouring the outer layer molten metal, flux may be added onto the injected molten metal flow, for example, at the pouring port 9 of the pouring trough 4, or it may be sprinkled on the inner surface of the outer layer by hand or together with a carrier gas after the outer layer is cast. It is customary to
（発明が解決しようとする課題）
近年、外層の使用特性の向上のため、外層の凝固速度を
早め、凝固組織を微細にすることが行われている。この
ためには、遠心力鋳造用金型の冷却能を高める工夫の他
に、鋳込温度を下げることが有効である。(Problems to be Solved by the Invention) In recent years, in order to improve the usage characteristics of the outer layer, efforts have been made to accelerate the solidification rate of the outer layer and make the solidified structure finer. To this end, it is effective to lower the casting temperature in addition to increasing the cooling capacity of the centrifugal casting mold.
ところが、鋳込温度を下げると、粉体状フラックスを外
層溶湯の鋳込みと同時に添加した場合、溶湯温度が局部
的に低下し、フラックスが遠心力鋳造された外層の内面
に浮上せず懸濁した状態で凝固する。ロール使用中に外
層の内部に埋入されたフラックスが現われると製品に疵
として転写され、品質上重大な問題となる。However, when the pouring temperature was lowered and powdered flux was added at the same time as the outer layer molten metal was poured, the molten metal temperature dropped locally and the flux did not float to the inner surface of the centrifugally cast outer layer, but became suspended. coagulates in the state. If the flux embedded inside the outer layer appears during use of the roll, it will be transferred to the product as a flaw, causing a serious quality problem.
尚、ホットランテーブルローラ等のローラも、上記複合
ロールと同様にして鋳造される場合があり、同様の問題
がある。Note that rollers such as hot run table rollers may also be cast in the same manner as the above-mentioned composite roll, and have similar problems.
本発明はかかる問題点に鑑みなされたもので、外層溶湯
の鋳込み温度を下げて鋳造した場合でも、外層溶湯温度
が低下せず、外層内にフラックスの埋入が生じない円筒
状複合鋳物の鋳造方法を提供することを目的とする。The present invention has been made in view of the above problems, and is capable of casting cylindrical composite castings in which the temperature of the molten metal in the outer layer does not drop and flux does not embed in the outer layer even when the casting temperature of the molten metal in the outer layer is lowered. The purpose is to provide a method.
（課題を解決するための手段）
上記目的を達成するためになされた本発明の鋳造方法は
、外層を遠心力鋳造し、その内面に内層を鋳造し、外層
の内面に内層を溶着する円筒状複合鋳物の鋳造方法にお
いて、外層溶湯を溶融したフラックスと共に鋳込むこと
を発明の構成とするものである。この際、フラックスは
外層用鋳込取鍋において、あるいは加熱炉において予め
溶融しておけばよい。(Means for Solving the Problems) The casting method of the present invention, which has been made to achieve the above object, consists of centrifugally casting an outer layer, casting an inner layer on the inner surface of the outer layer, and welding the inner layer to the inner surface of the outer layer. In a method for casting a composite casting, the structure of the invention is to cast the outer layer molten metal together with molten flux. At this time, the flux may be melted in advance in a casting ladle for the outer layer or in a heating furnace.
（作 用）
外層溶湯を溶融したフラックスと共に鋳込むので、鋳込
温度が低くてもフラックスを融解させるのに要する熱量
の損失はなく、溶湯温度の局部的低下を防止することが
でき、ひいてはフラックスの懸濁、外層中への巻き込み
を阻止することができる。また、鋳込中も溶湯を溶融し
たフラックスでカバーすることができるため、注湯樋上
で溶湯が酸化するのを防止することができる。(Function) Since the outer layer molten metal is cast together with the molten flux, there is no loss of heat required to melt the flux even if the casting temperature is low, and it is possible to prevent a local drop in the molten metal temperature, and as a result, the flux suspension and entrainment in the outer layer. Furthermore, since the molten metal can be covered with molten flux even during pouring, it is possible to prevent the molten metal from oxidizing on the pouring gutter.
フラックスの溶融については、外層用鋳込取鍋において
外層溶湯が鋳込温度以上の温度でフラックスを添加し溶
融すれば、特別な加熱装置を用いることなく、鋳込温度
を低下させることなくフラックスの溶解を行うことがで
きる。また、取鍋内の溶湯の表面がフラックスで覆われ
るため鋳込中の溶湯の表面酸化をも防止することができ
る。Regarding melting of flux, if flux is added and melted at a temperature higher than the casting temperature of the outer layer molten metal in the outer layer casting ladle, the flux can be melted without using a special heating device or without lowering the casting temperature. Dissolution can be carried out. Furthermore, since the surface of the molten metal in the ladle is covered with flux, surface oxidation of the molten metal during pouring can be prevented.
方、別途の加熱炉で溶解すれば、外層用鋳込取鍋で溶解
する場合に比べて、取鍋にフラックスが付着することが
なく掃除が容易であり、また外層用鋳込取鍋として上注
ぎ取鍋のみならず、下注ぎ取鍋をも使用することができ
、この場合ノロや酸化物の流入阻止や溶湯の温度管理の
容易化を図ることが可能となる。On the other hand, if melting is done in a separate heating furnace, compared to melting in a casting ladle for the outer layer, there will be no flux adhering to the ladle and it will be easier to clean. Not only a pouring ladle but also a bottom pouring ladle can be used, in which case it is possible to prevent the inflow of slag and oxides and to facilitate temperature control of the molten metal.
（実施例）
本発明において使用するフラックスとしては、既述の通
り、ソーダ灰、ケイ砂、ホウ砂等の原料粉末が単独であ
るいは混合調製して使用される。(Example) As the flux used in the present invention, raw material powders such as soda ash, silica sand, and borax are used alone or in a mixed manner, as described above.
予め混合調製して溶解し粉砕したものを用いてもよい。It is also possible to use a mixture prepared in advance, dissolved and pulverized.
原料粉末の配合は外層の内面を均一に覆うことができる
ように融点、流動性等を勘案して決定される。フラック
スの使用量は外層内面より０．５〜２Ｉｉ１１１程度の
厚さとなるような量にすればよい。The composition of the raw material powder is determined by taking into account the melting point, fluidity, etc. so that the inner surface of the outer layer can be uniformly covered. The amount of flux used may be such that the thickness of the outer layer is approximately 0.5 to 2Ii111 thicker than the inner surface of the outer layer.
フラックスの添加方法としては、外層鋳込前に取鍋に全
量添加し完全に溶融させた後、外層溶湯を鋳込む。この
場合、取鍋としては、第１図に示すように上注ぎ取鍋が
必要である。The method for adding flux is to add the entire amount to the ladle before casting the outer layer and allow it to completely melt, then pour the molten metal into the outer layer. In this case, a top pouring ladle is required as the ladle, as shown in FIG.
フラックスを粉体の状態から溶湯とほぼ同じ温度まで上
昇させるのに必要な熱量は、フラックスの組成や溶湯量
により異なるが、例えば３ ｔｏｎの外層溶湯の場合、
１１〜１８°Ｃ程度の温度降下が見込まれるので、溶湯
が鋳込温度より温度降下分より高い温度にある時点でフ
ラックスを添加すればよい。The amount of heat required to raise the flux from a powder state to almost the same temperature as the molten metal varies depending on the composition of the flux and the amount of molten metal, but for example, in the case of a 3 ton outer layer molten metal,
Since a temperature drop of about 11 to 18°C is expected, flux may be added when the molten metal is at a temperature higher than the casting temperature by the temperature drop.
フラックスの溶解後、外層溶湯を鋳込むに際しては、溶
湯が遠心力鋳造用金型の内面に１０ｍｍ程度鋳込まれる
間、例えば木片等で取鍋内の溶湯上に浮いているフラッ
クスを堰き止めておき、溶湯だけが先に注湯樋に流れ込
むようにするのがよい。After melting the flux, when pouring the outer layer of molten metal, while the molten metal is being cast into the inner surface of the centrifugal casting mold to a depth of about 10 mm, use a piece of wood, etc. to dam up the flux floating on top of the molten metal in the ladle. It is best to keep the molten metal in place so that only the molten metal flows into the pouring gutter first.
鋳込当初から溶湯とフラックスとを同時に鋳込むと、フ
ラックスが金型内面に塗着形成された塗型と反応して健
全な鋳物が得られ難くなるためである。This is because if molten metal and flux are simultaneously cast from the beginning of casting, the flux will react with the coating formed on the inner surface of the mold, making it difficult to obtain a sound casting.
フラックスを添加する他の方法として、フラックスを予
め加熱炉で溶融しておき、これを注湯樋上の溶湯流に添
加することもできる。添加のタイミングは、既述の通り
、溶湯のみが一定量鋳込まれた後に添加するのがよい。Another method of adding flux is to melt the flux in advance in a heating furnace and add it to the molten metal stream on the pouring trough. As mentioned above, the timing of addition is preferably after a certain amount of molten metal has been poured.
フラックス溶解用のるつぼとしては、フラックスが強塩
基性であるために純Ｎｉ、白金等で形成するのがよいが
、コスト的には純Ｎｉ製の方が安価である。The crucible for melting the flux is preferably made of pure Ni, platinum, etc. since the flux is strongly basic, but pure Ni is cheaper in terms of cost.
フラックスを別途の加熱炉で溶解する方法は、取鍋で溶
解する方法に比べて、フラックスが取鍋の耐火材に付着
せず掃除が容易であるほか、溶湯の温度管理が容易で、
また下注ぎ取鍋を用いることが可能となり、鋳込速度を
下注ぎ取鍋の下部に開設された流出孔の開度を調整する
ことで一定にすることもできる。Compared to melting flux in a ladle, the method of melting flux in a separate heating furnace is easier to clean because the flux does not adhere to the refractory material of the ladle, and the temperature of the molten metal is easier to control.
Furthermore, it becomes possible to use a bottom pouring ladle, and the casting speed can be made constant by adjusting the opening degree of the outflow hole provided at the bottom of the bottom pouring ladle.
次に具体的製造実施例を掲げて説明する。Next, specific manufacturing examples will be listed and explained.
ホットストリップミル仕上後段用複合ロール（胴径７５
０φ肝、胴長１７００ｍｍ）の製造実施例。Composite roll for hot strip mill finishing latter stage (body diameter 75
Manufacturing example of 0φ liver, body length 1700mm).
（１）第１表に示す外層溶湯（Ｎｉグレン材）３ｔｏｎ
を、第１図に示す遠心力鋳造装置を用いて、内径７９５
胴の遠心力鋳造用金型に鋳込んだ。鋳込温度、鋳込時間
は同表の通りである。(1) 3 tons of outer layer molten metal (Ni grain material) shown in Table 1
was cast using the centrifugal force casting apparatus shown in FIG.
It was cast into a centrifugal force casting mold for the body. The casting temperature and casting time are as shown in the same table.
（２）鋳込みの際、フラックスを下記の要領で添加した
。フラックスは、硼砂３０％、ソーダ灰２０％、珪砂５
０％の配合とし、合計量では１８ｋｇ使用した。(2) During casting, flux was added in the following manner. Flux: 30% borax, 20% soda ash, 5% silica sand
The total amount was 18 kg.
■ 実施例１
外層用鋳込取鍋において、溶湯が１３２５°Ｃの時点で
フラックスを散布し溶融させた。溶湯が１２８０°Ｃに
低下した時点で鋳込みを開始した。開始後１５秒間は取
鍋出口からフラックスを流出しないように木片によって
フラックスを堰止めし、溶湯のみを注湯樋を介して鋳込
んだ。１５秒経過後は、フラックスと溶湯とを同時に流
出させて、鋳込んだ。■Example 1 In a casting ladle for the outer layer, flux was sprinkled and melted when the molten metal reached 1325°C. Casting was started when the temperature of the molten metal decreased to 1280°C. For 15 seconds after starting, the flux was dammed with a piece of wood to prevent it from flowing out from the ladle outlet, and only the molten metal was poured through the pouring gutter. After 15 seconds had elapsed, the flux and molten metal were simultaneously flowed out and cast.
■ 実施例２
フラックスを別途純Ｎｉ製るつぼを用いて１３００°Ｃ
で溶解した。注湯樋の注湯口において、取鍋より流し込
まれた溶湯流の上に前記るつぼの底に明けた流下孔より
溶融フラックスを流下させて添加しつつ、溶湯をフラッ
クスと共に鋳込んだ。■ Example 2 Flux was heated to 1300°C using a pure Ni crucible.
It was dissolved in At the pouring spout of the pouring trough, the molten metal was poured together with the flux while being added to the molten metal flowing from the ladle by flowing it down from the flow hole formed in the bottom of the crucible.
■ 従来例１および２
粉末状のフラックスを注湯樋の注湯口において、溶湯流
に添加しつつ鋳込んだ。■ Conventional Examples 1 and 2 Powdered flux was poured into the molten metal stream while being added to the molten metal flow at the pouring spout of the pouring trough.
（以下成葉）
（３）外層鋳込後、２５〜２８分経過後に金型の回転を
止め、外層を内存した金型を垂直に立て、軸部形成用の
上型および下型をその両端に取付けて静置鋳型を構成し
、その内部に内層（芯部）溶湯として高級鋳鉄溶湯を１
３７０°Ｃで鋳込んだ。尚、金型の回転を止めてから内
層溶湯を鋳込むまでに要した時間は４分程度であった。(hereinafter referred to as mature leaf) (3) After 25 to 28 minutes have elapsed after the outer layer is cast, stop the rotation of the mold, stand the mold containing the outer layer vertically, and place the upper and lower molds for forming the shaft at both ends. A stationary mold is constructed by attaching it to the mold, and a high-grade cast iron molten metal is placed inside the mold as the inner layer (core) molten metal.
It was cast at 370°C. The time required from stopping the rotation of the mold to casting the inner molten metal was about 4 minutes.
（４）４日後、型ばらしを行ない、熱処理後、機械加工
を施して黒皮を除去し、超音波探傷検査を行った。その
結果、実施例１および２並びに１３１０°Ｃでの高温鋳
込を行った従来例２では、外層内にフラックスが埋入さ
れた欠陥は認められなかった。これに対して、低温鋳込
みを行った従来例１では欠陥が認められた。(4) After 4 days, the mold was demolished, heat treated, and then machined to remove the black skin, and ultrasonic flaw detection was performed. As a result, in Examples 1 and 2 and Conventional Example 2 in which high-temperature casting was performed at 1310° C., no defects caused by embedded flux in the outer layer were observed. On the other hand, defects were observed in Conventional Example 1 in which low-temperature casting was performed.
一方、外層組織を顕微鏡観察したところ、低温鋳込を行
った実施例１および２並びに従来例１は組織の微細化が
認められたが、従来例２では組織が粗大化していた。On the other hand, microscopic observation of the outer layer structure revealed that Examples 1 and 2 and Conventional Example 1 in which low-temperature casting was performed had a finer structure, but Conventional Example 2 had a coarser structure.
（発明の効果）
以上説明した通り、本発明の円筒状複合鋳物の鋳造方法
によれば、外層溶湯の鋳込みに際し、既に溶融したフラ
ックスを同時に鋳込むため、鋳込み時にフラックスの添
加による溶湯温度の低下は生じず、このため低温鋳込み
を行っても外層中にフラックスが埋入されるおそれがな
く、しかも組織の微細化を図ることができる。(Effects of the Invention) As explained above, according to the method for casting a cylindrical composite casting of the present invention, already molten flux is simultaneously cast when pouring the outer layer molten metal, so the temperature of the molten metal is lowered by adding flux during casting. Therefore, even if low-temperature casting is performed, there is no risk of flux being embedded in the outer layer, and the structure can be made finer.
この際、フラックスを外層用鋳込取鍋で溶融すればフラ
ックスの溶融を特別な加熱炉なしに容易に実施すること
ができ、一方別途の加熱炉で溶融すれば溶湯の温度管理
の容易化が図られ、更に下注ぎ取鍋の使用が可能となる
。At this time, if the flux is melted in a casting ladle for the outer layer, the flux can be easily melted without a special heating furnace, while if it is melted in a separate heating furnace, the temperature of the molten metal can be easily controlled. This also makes it possible to use a bottom pouring ladle.
第１図は遠心力鋳造装置の一例を示す部分断面説明図で
ある。FIG. 1 is a partial cross-sectional explanatory view showing an example of a centrifugal casting apparatus.
Claims (3)
外層の内面に内層を溶着する円筒状複合鋳物の鋳造方法
において、 外層溶湯を溶融したフラックスと共に鋳込むことを特徴
とする円筒状複合鋳物の鋳造方法。(1) The outer layer is centrifugally cast, the inner layer is cast on the inner surface,
A method for casting a cylindrical composite casting in which an inner layer is welded to the inner surface of the outer layer, the method comprising casting the outer layer molten metal together with molten flux.
の温度でフラックスを溶融する請求項（１）の円筒状複
合鋳物の鋳造方法。(2) The method for casting a cylindrical composite casting according to claim (1), wherein the flux is melted in the outer layer casting ladle at a temperature higher than the casting temperature of the outer layer molten metal.
）の円筒状複合鋳物の鋳造方法。(3) Claim (1) in which the flux is melted in a heating furnace
) casting method for cylindrical composite castings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12359790A JPH0417970A (en) | 1990-05-14 | 1990-05-14 | Method for casting cylindrical composite casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12359790A JPH0417970A (en) | 1990-05-14 | 1990-05-14 | Method for casting cylindrical composite casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0417970A true JPH0417970A (en) | 1992-01-22 |
Family
ID=14864553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12359790A Pending JPH0417970A (en) | 1990-05-14 | 1990-05-14 | Method for casting cylindrical composite casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0417970A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825480A (en) * | 2017-02-23 | 2017-06-13 | 中钢集团邢台机械轧辊有限公司 | A kind of Adding Way of the covering slag for pouring into a mould centrifugal roller |
| CN106825509A (en) * | 2016-12-30 | 2017-06-13 | 中钢集团邢台机械轧辊有限公司 | The preparation method of heavy plate mill four-roller roughing high chrome working roll binder course |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57118849A (en) * | 1981-01-14 | 1982-07-23 | Kubota Ltd | Abrasion resistant centrifugally cast casting of cast iron and its production |
| JPS5886965A (en) * | 1981-11-18 | 1983-05-24 | Kubota Ltd | Production of composite roll |
-
1990
- 1990-05-14 JP JP12359790A patent/JPH0417970A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57118849A (en) * | 1981-01-14 | 1982-07-23 | Kubota Ltd | Abrasion resistant centrifugally cast casting of cast iron and its production |
| JPS5886965A (en) * | 1981-11-18 | 1983-05-24 | Kubota Ltd | Production of composite roll |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825509A (en) * | 2016-12-30 | 2017-06-13 | 中钢集团邢台机械轧辊有限公司 | The preparation method of heavy plate mill four-roller roughing high chrome working roll binder course |
| CN106825480A (en) * | 2017-02-23 | 2017-06-13 | 中钢集团邢台机械轧辊有限公司 | A kind of Adding Way of the covering slag for pouring into a mould centrifugal roller |
| CN106825480B (en) * | 2017-02-23 | 2019-06-21 | 中钢集团邢台机械轧辊有限公司 | A kind of Adding Way for the covering slag being poured centrifugal roller |
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