JP3003914B2 - Method for producing copper alloy containing active metal - Google Patents
Method for producing copper alloy containing active metalInfo
- Publication number
- JP3003914B2 JP3003914B2 JP6260447A JP26044794A JP3003914B2 JP 3003914 B2 JP3003914 B2 JP 3003914B2 JP 6260447 A JP6260447 A JP 6260447A JP 26044794 A JP26044794 A JP 26044794A JP 3003914 B2 JP3003914 B2 JP 3003914B2
- Authority
- JP
- Japan
- Prior art keywords
- pouring
- molten metal
- copper alloy
- active metal
- alloy containing
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/113—Treating the molten metal by vacuum treating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/04—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
- B22D41/05—Tea-pot spout ladles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Continuous Casting (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、活性金属を含有する銅
合金インゴットの製造方法に関する。The present invention relates to a method for producing a copper alloy ingot containing an active metal.
【０００２】[0002]
【従来の技術】酸素との化学的親和力が銅よりも大きい
金属（以下、「活性金属」という）、例えば鉄、チタ
ン、クロム、ジルコニウム等を含有する銅合金（以下、
「銅合金」という）の溶解に当っては、活性金属の歩留
およびインゴット品質を向上させる上で銅合金中の活性
金属の酸化を防止することが不可欠である。したがっ
て、従来から利用されているいわゆる真空溶解法は、真
空排気した気密容器内の誘導溶解炉（以下、「溶解炉」
という）内で銅合金を溶解する方法であり、銅合金の酸
化防止には有効な手段である。一方、真空溶解した溶湯
の清浄度を保った状態で溶湯を鋳造する手段として、溶
解炉の気密容器内に収めた鋳型へ鋳込む真空鋳造法が有
効であるが、容積の限られた気密容器内での鋳造はいわ
ゆる造塊法に限定され、得られたインゴットを熱間圧延
する前に鍛造、皮剥きなどの加工が必要となる。2. Description of the Related Art Copper alloys containing a metal having a higher chemical affinity for oxygen than copper (hereinafter referred to as "active metal"), such as iron, titanium, chromium, zirconium, etc.
In dissolving the “copper alloy”, it is essential to prevent oxidation of the active metal in the copper alloy in order to improve the yield of the active metal and the quality of the ingot. Therefore, the so-called vacuum melting method conventionally used is an induction melting furnace (hereinafter, referred to as a “melting furnace”) in an airtight container evacuated.
), Which is an effective means for preventing oxidation of the copper alloy. On the other hand, as a means for casting the molten metal in a state where the vacuum-melted molten metal is kept clean, a vacuum casting method in which the molten metal is cast into a mold housed in an airtight container of a melting furnace is effective, but an airtight container having a limited capacity. The casting in the inside is limited to the so-called ingot making method, and forging, peeling, and the like are required before hot rolling the obtained ingot.
【０００３】[0003]
【発明が解決しようとする課題】前記の従来技術では、
溶解炉が気密容器内に収められていることから真空溶解
中に発生したスラグを除去する有利な手段がなく、溶解
する原料を限定する必要があった。したがって、通常ス
クラップの使用は避け、いわゆるバージン原料のみを溶
解して不可避的に発生するスラグを最小限にとどめる必
要がある。しかしながら、鋳型に溶湯を鋳込む際には溶
解炉を傾動して出湯するため、不可避的に発生したスラ
グは溶解炉の傾動とともに出湯口に流れ込み、鋳型内へ
巻き込まれることが避けられない現状である。In the above prior art,
Since the melting furnace is housed in an airtight container, there is no advantageous means for removing slag generated during vacuum melting, and it is necessary to limit the raw materials to be melted. Therefore, it is necessary to avoid the use of scrap, and to minimize the inevitable slag by dissolving only the so-called virgin raw material. However, when pouring the molten metal into the mold, the melting furnace is tilted and the molten metal flows out, so the slag generated inevitably flows into the tap hole with the tilting of the melting furnace and is inevitably caught in the mold. is there.
【０００４】一方、大型のインゴットを必要とする際
は、真空溶解・真空鋳造法では溶解炉および鋳型を収納
する気密容器全体を大型化する必要があり、さらに真空
排気能力の増強を必要とする。On the other hand, when a large ingot is required, the vacuum melting / vacuum casting method needs to increase the size of the entire hermetic container for accommodating the melting furnace and the mold, and further requires an increase in the vacuum pumping capacity. .
【０００５】また、コスト競争力の観点からすると直接
熱間圧延可能な大型インゴットを製造するためには、連
続鋳造法による鋳造が望ましいが、連続鋳造機全体を気
密容器内に収めるためには莫大な設備投資を必要とす
る。このような設備コストの上昇を避けるためには、真
空溶解した溶湯を一旦大気中または保護雰囲気中の樋な
どの連続鋳造機への移送経路へ出湯することが現実的で
あるが、溶解炉傾動によるスラグの流れ込みとともに、
出湯口および移送経路での活性金属の酸化は避けられ
ず、インゴット品質を著しく低下させる原因となる。[0005] From the viewpoint of cost competitiveness, casting by a continuous casting method is desirable in order to manufacture a large ingot that can be directly hot-rolled. However, it is enormous to fit the entire continuous casting machine in an airtight container. Requires high capital investment. In order to avoid such an increase in equipment cost, it is practical to temporarily discharge the molten metal that has been melted in vacuum into a transfer path to a continuous casting machine such as a gutter in the atmosphere or a protective atmosphere. With the inflow of slag
Oxidation of the active metal at the tap and transfer path is unavoidable and causes a significant reduction in ingot quality.
【０００６】本発明は、かかる事情に鑑み完成されたも
のであり、活性金属を含む銅合金の溶解鋳造に際し原料
としてスクラップを溶解してもスラグの発生を抑制し、
また発生したスラグを巻き込むことなく溶湯を炉外へ出
湯し、かつ清浄度が優れた大型のインゴットを連続鋳造
により製造することが可能な活性金属を含む銅合金の製
造方法を提供することを目的とする。The present invention has been completed in view of the above circumstances, and suppresses the generation of slag even when scrap is melted as a raw material in melting and casting a copper alloy containing an active metal,
It is another object of the present invention to provide a method for producing a copper alloy containing an active metal, which is capable of discharging a molten metal out of a furnace without involving generated slag and producing a large ingot having excellent cleanliness by continuous casting. And
【０００７】[0007]
【課題を解決するための手段】本発明は、前記目的を達
成するための活性金属含有銅合金の製造方法であり、活
性金属を含有する銅合金を溶解鋳造する際に、真空排気
した気密容器内の誘導溶解炉で原料を真空溶解した後、
前記気密容器へ圧力を印加し、注湯サイホンを通して溶
湯を連続鋳造鋳型に鋳造することを特徴とする活性金属
を含有する銅合金の製造方法である。SUMMARY OF THE INVENTION The present invention is a method for producing an active metal-containing copper alloy for achieving the above object. After vacuum melting the raw materials in the induction melting furnace inside,
A method for producing a copper alloy containing an active metal, characterized by applying pressure to the airtight container and casting the molten metal into a continuous casting mold through a pouring siphon.
【０００８】また、具体的には、 （１）真空溶解用炉蓋で密閉され真空排気が可能な気密
容器を真空排気配管により真空排気し、その後注湯サイ
ホンを貫通させた加圧注湯用炉蓋に交換して前記気密容
器を密閉し、圧力配管から気密容器内へ圧力を印加する
方法， （２）注湯ノズルから出湯された溶湯を一旦受湯容器に
溜め、その底部に設けた鋳造ノズルから出湯した溶湯を
連続鋳造する方法、 （３）溶解原料の少なくとも一部としてスクラップを使
用する方法、 （４）加圧注湯用炉蓋で密閉した気密容器内を不活性ガ
スで圧力を印加する方法、 （５）受湯容器内の溶湯の液面を不活性ガスで保護する
方法に関する。 圧力配管から圧力を印加し、注湯サイホンを利用して真
空溶解した溶湯を連続して注湯ノズルから出湯し、さら
に、注湯ノズルから出湯した溶湯を連続鋳造する方法を
採用することができる。[0008] More specifically, (1) a pressurizing and pouring furnace in which a hermetically sealed container which is sealed with a vacuum melting furnace lid and which can be evacuated is evacuated by evacuation piping, and thereafter a pouring siphon is penetrated. A method in which the airtight container is sealed by replacing with a lid, and pressure is applied from the pressure pipe into the airtight container. (2) The molten metal discharged from the pouring nozzle is temporarily stored in a hot water receiving container, and the casting provided on the bottom thereof is provided. A method of continuously casting molten metal discharged from a nozzle, (3) A method of using scrap as at least a part of a molten material, (4) A pressure is applied with an inert gas in an airtight container sealed with a pressure pouring furnace lid. (5) A method for protecting the liquid level of the molten metal in the hot water receiving container with an inert gas. A method in which pressure is applied from a pressure pipe, a molten metal melted in vacuum using a pouring siphon is continuously discharged from a pouring nozzle, and a molten metal discharged from a pouring nozzle can be continuously cast. .
【０００９】[0009]
【作用】本発明のように溶解・鋳造プロセスを構成する
と、原料がスクラップであっても真空誘導溶解中に発生
するスラグ量は抑制され、溶解後注湯サイホンを利用し
て圧力により出湯を行うと溶解炉を傾倒する際の酸化と
スラグの巻き込みを避けて鋳造することができ、また連
続鋳造インゴットの後工程での皮剥きなどを避けること
ができる。When the melting / casting process is configured as in the present invention, the amount of slag generated during vacuum induction melting is suppressed even if the raw material is scrap, and tapping is performed by pressure using a pouring siphon after melting. Casting can be avoided by avoiding oxidation and slag entrapment when tilting the melting furnace, and peeling in a subsequent step of the continuous casting ingot can be avoided.
【００１０】さらに、本発明の具体的構成の作用につい
て具体的に説明する。まず、活性金属を含有する銅合金
の地金原料またはスクラップを溶解炉内へ投入し、溶解
炉を収納した気密容器の上端部に真空溶解用炉蓋を装着
密閉して、いわゆる真空溶解炉を形成する。そして真空
排気装置により真空排気配管から気密容器内を所望の圧
力まで排気し、溶解炉内の原料またはスクラップを誘導
加熱により溶解する。Further, the operation of the specific structure of the present invention will be described in detail. First, a raw material or scrap of a copper alloy containing an active metal is put into a melting furnace, and a furnace lid for vacuum melting is attached and sealed at the upper end of an airtight container housing the melting furnace, so-called a vacuum melting furnace is formed. Form. Then, the inside of the airtight container is evacuated to a desired pressure from the evacuation pipe by the evacuation device, and the raw material or scrap in the melting furnace is melted by induction heating.
【００１１】この際に、炉内の原料を誘導加熱により真
空溶解するから、銅合金の酸化は防止される。また、原
料としてスクラップを使用した場合には溶解時にスラグ
の発生は防ぐことはできないが、真空中での溶解である
ためスラグの発生は大気溶解と比較して大幅に抑制され
る。さらに、装入原料の溶解終了後、真空中で溶湯温度
が低下しない程度の電力を保持したまま保持すると、炉
内の溶湯は鎮静化され、溶解中に発生したスラグは溶湯
との比重差によって溶湯表面へ浮上する。At this time, since the raw material in the furnace is melted in vacuum by induction heating, oxidation of the copper alloy is prevented. When scrap is used as a raw material, generation of slag cannot be prevented at the time of melting, but since the melting is performed in a vacuum, the generation of slag is significantly suppressed as compared with the atmospheric melting. In addition, after the melting of the charged raw materials, if the electric power is maintained in a vacuum so that the molten metal temperature does not decrease, the molten metal in the furnace is calmed down, and the slag generated during the melting is caused by the difference in specific gravity from the molten metal. Ascends to the surface of the melt.
【００１２】次に、炉蓋を真空溶解用炉蓋から加圧注湯
用炉蓋に交換し、加圧注湯用炉蓋を固定して気密容器を
再び密閉する。この加圧注湯用炉蓋に交換する際に炉内
溶湯は一旦大気に暴露されるが、溶湯表面に浮上したス
ラグの層が被膜となり、炉内溶湯の酸化は抑制される。Next, the furnace lid is changed from the furnace lid for vacuum melting to the furnace lid for pressurized pouring, the furnace lid for pressurized pouring is fixed, and the airtight container is closed again. The molten metal in the furnace is once exposed to the atmosphere when it is replaced with the furnace lid for pressurized pouring, but the slag layer floating on the surface of the molten metal becomes a film, and the oxidation of the molten metal in the furnace is suppressed.
【００１３】そして、加圧注湯用炉蓋の圧力管より注湯
圧力制御装置で制御された圧力を気密容器内に印加し
て、溶解炉内の溶湯表面を押し下げると、炉内の溶湯は
唯一の炉外への出口である溶解炉底部まで挿入された注
湯サイホン内を上昇して注湯室まで汲み上げられ、注湯
室の他端に設けられた注湯ノズルより連続鋳造機へ注湯
される。このようにして加圧により注湯サイホンから注
湯室に汲み上げられた溶湯が注湯ノズルから連続鋳造機
へ出湯されるが、浮上しているスラグは所定量の出湯が
終了するまで炉内溶湯表面に浮上したままであり、連続
鋳造機への出湯に巻き込まれることはない。When the pressure controlled by the pouring pressure control device is applied from the pressure tube of the pressure pouring furnace lid into the hermetic container and the surface of the molten metal in the melting furnace is depressed, the molten metal in the furnace becomes unique. It rises inside the pouring siphon inserted to the bottom of the melting furnace, which is the outlet to the outside of the furnace, and is pumped up to the pouring chamber, and is poured into the continuous casting machine from the pouring nozzle provided at the other end of the pouring chamber. Is done. In this way, the molten metal pumped from the pouring siphon into the pouring chamber by pressure is discharged from the pouring nozzle to the continuous casting machine, and the slag that has floated is melted in the furnace until a predetermined amount of molten metal is discharged. It remains floating on the surface and is not involved in tapping into the continuous casting machine.
【００１４】また、注湯ノズルから出湯された溶湯を、
タンデイッシュ等の受湯容器で受湯し、受湯容器内に溶
湯を貯め込むことにより不可避的に巻き込まれた酸化物
を再度浮上分離し、受湯容器の底部に設けた鋳造ノズル
より溶湯を連続鋳造機へ出湯すれば、さらに清浄度の高
い溶湯を鋳造することができる。Further, the molten metal discharged from the pouring nozzle is
The hot water is received in a hot water container such as a tundish, and the molten metal is stored in the hot water container so that the unavoidably entangled oxide is floated and separated again. The molten metal is discharged from the casting nozzle provided at the bottom of the hot water container. If the molten metal is discharged to a continuous casting machine, a molten metal having a higher degree of cleanliness can be cast.
【００１５】さらに、加圧注湯用炉蓋で密閉した気密容
器内への圧力の印加を不活性ガスで行うこと、また受湯
室、タンディッシュ等の受湯容器内を不活性雰囲気とす
ることで溶解炉から連続鋳造機までの溶湯移送経路での
溶湯の酸化を防止することができる。Further, the pressure is applied to the airtight container sealed with the furnace lid for pressurized pouring with an inert gas, and the inside of the hot water container such as a hot water receiving chamber or a tundish is set to an inert atmosphere. Thus, oxidation of the molten metal in the molten metal transfer path from the melting furnace to the continuous casting machine can be prevented.
【００１６】[0016]
【実施例】本発明に係る活性金属を含有する銅合金の製
造方法を、Ｃｕ−１％Ｆｅ合金を例にとって説明する。
本実施例において銅合金中に含まれる活性金属は鉄であ
り、その含有量は１重量％であるが、これは本発明の一
実施例に過ぎず、鉄の含有量は本発明の範囲を限定する
ものではない。また、銅合金中に含まれる活性金属とし
て本実施例では鉄を取り上げて説明するが、これも本発
明の範囲を限定するものではない。本発明における活性
金属とは、酸素との化学的親和力が銅よりも大きい金属
元素すべてを指す。したがって先に列挙したもの以外に
アルミニウム等も含まれる。また、銅合金中に他の活性
金属およびその他の金属が１種または２種以上含まれて
いても構わない。溶解する原料のうちスクラップの比率
が３０％となるようにして銅地金、電解鉄、合金のスク
ラップを配合した。DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for producing a copper alloy containing an active metal according to the present invention will be described by taking a Cu-1% Fe alloy as an example.
In this embodiment, the active metal contained in the copper alloy is iron, and its content is 1% by weight. However, this is only one example of the present invention, and the iron content is within the scope of the present invention. It is not limited. Further, in the present embodiment, iron will be described as an active metal contained in the copper alloy, but this does not limit the scope of the present invention. The active metal in the present invention refers to all metal elements that have a greater chemical affinity for oxygen than copper. Therefore, aluminum and the like are included in addition to those listed above. Further, one or more other active metals and other metals may be contained in the copper alloy. Copper ingot, electrolytic iron, and alloy scrap were blended so that the ratio of scrap among the raw materials to be dissolved was 30%.
【００１７】図１は無鉄心ルツボ型誘導溶解炉４を収納
した気密容器５の上端に、真空溶解用炉蓋９を装着した
断面図である。１は継鉄、２は加熱コイル、３はルツ
ボ、６は断熱レンガ、７はキャスタブル耐火物であり、
何れも誘導炉において公知のものである。１１はパッキ
ンである。図１の装置では、真空排気配管１２より図示
しない真空ポンプによって気密容器５内を真空排気し、
予め溶解炉４内に装入した原料を真空溶解した。溶解
中、残りの原料は、断熱材１０で内張りされた真空溶解
用炉蓋９の上端に設置してある原料投入装置１３の原料
投入バケット１８を昇降装置１９により下降させること
により数回に分けて溶解炉４内へ追加投入した。この
際、エアシリンダー１５によりゲートバルブ１４を開放
し、原料投入後再びゲートバルブ１４を閉じて溶解炉内
を真空吸引する。１７は原料バケット１８交換の時に原
料投入装置１３を解放する原料投入室扉である。なお、
原料投入装置１３内も真空排気配管１６により図示しな
い真空ポンプによって真空排気することができ、原料の
追加投入も真空中で行うことができる。FIG. 1 is a sectional view in which a furnace lid 9 for vacuum melting is mounted on the upper end of an airtight container 5 containing a coreless crucible type induction melting furnace 4. 1 is a yoke, 2 is a heating coil, 3 is a crucible, 6 is an insulating brick, 7 is a castable refractory,
All are known in induction furnaces. 11 is a packing. In the apparatus shown in FIG. 1, the inside of the hermetic container 5 is evacuated from a vacuum exhaust pipe 12 by a vacuum pump (not shown).
The raw materials charged in the melting furnace 4 in advance were melted in vacuum. During melting, the remaining raw material is divided into several parts by lowering a raw material charging bucket 18 of a raw material charging device 13 installed at an upper end of a vacuum melting furnace lid 9 lined with a heat insulating material 10 by an elevating device 19. Into the melting furnace 4. At this time, the gate valve 14 is opened by the air cylinder 15, and after charging the raw material, the gate valve 14 is closed again and the inside of the melting furnace is evacuated. Reference numeral 17 denotes a raw material charging chamber door that releases the raw material charging device 13 when the raw material bucket 18 is replaced. In addition,
The inside of the raw material input device 13 can also be evacuated by a vacuum pump (not shown) through the vacuum exhaust pipe 16, and the additional input of the raw material can be performed in a vacuum.
【００１８】すべての原料の溶解が終了し溶落状態とな
ったら、溶湯測温装置２３の測温室２１内に装着された
熱電対２０を溶湯８内に突入してその温度を測定する。
電力を調整して溶湯を保持状態とした後、図示しない移
動装置により真空溶解用炉蓋９と加圧注湯用炉蓋２５
（図２参照）を交換する。When the melting of all the raw materials is completed and the melted state is reached, the thermocouple 20 mounted in the temperature measuring chamber 21 of the molten metal temperature measuring device 23 is inserted into the molten metal 8 and its temperature is measured.
After adjusting the electric power to hold the molten metal, the vacuum melting furnace lid 9 and the pressurized pouring furnace lid 25 are moved by a moving device (not shown).
Replace (see FIG. 2).
【００１９】図２は、同じ無鉄心ルツボ型誘導加熱炉４
を収納した気密容器５の上端に、ボルト２８と押え金具
２９を介して加圧注湯用炉蓋２５を装着した断面図であ
る。加圧注湯用炉蓋２５に設けられた圧力配管２６より
図示しない注湯圧力制御装置で制御された不活性ガス圧
力を気密容器５内に印加すると、溶解炉４内でスラグ層
５２で被覆された溶湯８の表面は押し下げられ、溶解炉
底部に挿入された注湯サイホン３２を上昇して注湯室３
１内の注湯樋３４へ汲み上げられる。FIG. 2 shows the same ironless crucible type induction heating furnace 4.
FIG. 3 is a cross-sectional view in which a furnace lid 25 for pressurizing and pouring is attached to the upper end of an airtight container 5 in which is stored via a bolt 28 and a press fitting 29. When an inert gas pressure controlled by a pouring pressure control device (not shown) is applied to the hermetic container 5 through a pressure pipe 26 provided in the pressurized pouring furnace lid 25, the slag layer 52 covers the inside of the melting furnace 4. The surface of the molten metal 8 is pushed down, and the pouring siphon 32 inserted into the bottom of the melting furnace is raised to raise the pouring chamber 3.
It is pumped up to the pouring gutter 34 in 1.
【００２０】注湯室３１の上部は開閉可能な注湯室密閉
蓋３５で密閉し、ガス配管３８から不活性ガスを封入し
て注湯中の溶湯３７の酸化を防止している。また、注湯
室３１の側壁には図示しない電熱ヒーターが設置されて
おり、電熱ヒーターで注湯室３１内部の注湯樋３４を銅
合金の融点以上の温度に加熱しているので、注湯室３１
内で溶湯は一定温度に保たれる。The upper part of the pouring chamber 31 is closed by a pouring chamber sealing lid 35 that can be opened and closed, and an inert gas is sealed from a gas pipe 38 to prevent oxidation of the molten metal 37 during pouring. Further, an electric heater (not shown) is installed on the side wall of the pouring chamber 31, and the pouring gutter 34 inside the pouring chamber 31 is heated to a temperature equal to or higher than the melting point of the copper alloy by the electric heater. Room 31
Inside the melt is kept at a constant temperature.
【００２１】加圧により注湯サイホン３２から注湯室３
１へ汲み上げられた溶湯３７は、注湯室３１の他端に設
けた注湯ノズル３３からランスパイプ３９を通じてタン
ディッシュ４４ヘ注湯されるが、注湯量の制御は図示し
ない圧力制御装置による気密容器５内への印加圧力の制
御で行い、一定量を連続的に注湯する。この際、また、
覗き窓３６から溶湯３７の液面の高低、注湯ノズル３３
への溶湯の流入挙動を観察する。注湯サイホン３２は炉
内の底部まで挿入されているため、スラグ３０を浮上分
離したまま炉内底部の溶湯が注湯サイホン３２を上昇す
る。そして浮上しているスラグ３０は所定量の注湯が終
了するまで炉内溶湯表面に浮上したままであり、タンデ
ィッシュ４４への注湯に巻き込まれることはない。The pressure is applied from the pouring siphon 32 to the pouring chamber 3
1 is poured into a tundish 44 from a pouring nozzle 33 provided at the other end of the pouring chamber 31 through a lance pipe 39. The pouring amount is controlled by a pressure control device (not shown) in an airtight manner. This is performed by controlling the pressure applied to the container 5, and a certain amount is continuously poured. At this time,
The level of the liquid level of the molten metal 37 from the viewing window 36, the pouring nozzle 33
Observe the inflow behavior of the molten metal into the furnace. Since the pouring siphon 32 is inserted to the bottom in the furnace, the molten metal at the bottom of the furnace rises up the pouring siphon 32 while the slag 30 is floated and separated. The floating slag 30 remains floating on the surface of the molten metal in the furnace until the pouring of a predetermined amount has been completed, and is not involved in pouring into the tundish 44.
【００２２】タンディッシュ４４の底部には鋳造ノズル
４８が設けられており、鋳造ノズル４８の上端をストッ
パ４９で塞ぎ、図示しないガスバーナーで十分な余熱を
行った後に加圧注湯によりランスパイプ３９を通じて溶
湯を受湯する。所定量の溶湯４６が貯まったら、図示し
ない制御装置によりストッパ４９を上昇して鋳造ノズル
４８を開口すると、タンディッシュ４４の底部より溶湯
４６は鋳造ノズル４８を通じて半連続鋳造装置の水冷銅
鋳型５１内へ供給され、順次冷却され凝固する。凝固し
たインゴットは図示しない油圧シリンダで一定速度で鉛
直下方に連続的に引き抜かれる。A casting nozzle 48 is provided at the bottom of the tundish 44. The upper end of the casting nozzle 48 is closed with a stopper 49, and after sufficient residual heat is applied by a gas burner (not shown), the molten metal is pressurized and poured through a lance pipe 39. Receive the molten metal. When a predetermined amount of the molten metal 46 is accumulated, the stopper 49 is raised by a control device (not shown) and the casting nozzle 48 is opened, and the molten metal 46 is passed through the casting nozzle 48 from the bottom of the tundish 44 into the water-cooled copper mold 51 of the semi-continuous casting apparatus. And cooled and solidified sequentially. The solidified ingot is continuously drawn vertically downward at a constant speed by a hydraulic cylinder (not shown).
【００２３】この際、タンディッシュ４４内には一定量
の溶湯が貯められ、溶湯４６内に不可避で混入した鉄酸
化物はここで再度浮上分離され、鋳造ノズル４８へは底
部の清浄度の高い溶湯のみが順次流れ込み、連続鋳造機
に供給される。At this time, a certain amount of molten metal is stored in the tundish 44, and the iron oxide unavoidably mixed in the molten metal 46 is separated again by flotation, and the bottom of the casting nozzle 48 has high cleanliness. Only the molten metal flows sequentially and is supplied to the continuous casting machine.
【００２４】ランスパイプ３９は注湯ノズル３３下方に
接続され、先端がタンディッシュ４４内へ挿入されてい
るため、注湯ノズル３３から落下する溶湯は大気に暴露
されることなくタンディッシュ４４内へ供給される。ま
た、タンディッシュ４４の上部は開閉可能な密閉蓋４７
で密閉し、ガス配管５０から不活性ガスを封入して受湯
した溶湯の酸化を防止している。Since the lance pipe 39 is connected below the pouring nozzle 33 and the tip is inserted into the tundish 44, the molten metal falling from the pouring nozzle 33 enters the tundish 44 without being exposed to the atmosphere. Supplied. The upper part of the tundish 44 has an openable / closable lid 47.
And an inert gas is sealed from the gas pipe 50 to prevent oxidation of the received molten metal.
【００２５】また、タンディッシュ４４に貯められた溶
湯４６は、タンディッシュ４４に設けた加熱コイル４１
により誘導加熱されるため、常に一定温度に保たれてい
る。The molten metal 46 stored in the tundish 44 is supplied to a heating coil 41 provided in the tundish 44.
, It is always kept at a constant temperature.
【００２６】比較例として、すべて地金で用意した原料
を真空溶解後、炉傾動による大気出湯で連続鋳造した。
このようにして溶解鋳造したインゴットを切断し、断面
を研磨後、顕微鏡観察により鉄酸化物の分布状況を観察
した結果を表１に示す。表１には、観察断面２０ｃｍ2
で観察された鉄酸化物の１ｃｍ2 当たりの個数と最大長
さを示した。As a comparative example, the raw materials prepared by using all the ingots were melted in vacuum and then continuously cast by tapping into the atmosphere by furnace tilting.
The ingot thus melt-cast was cut, the cross section was polished, and the distribution of iron oxides was observed under a microscope. The results are shown in Table 1. Table 1 shows the observed cross section of 20 cm 2
Shows the number of iron oxides per 1 cm 2 and the maximum length observed in.
【００２７】表１からも明らかなように、本発明に係る
製造方法で製造したＣｕ−１％Ｆｅインゴット中に含ま
れる鉄酸化物の個数は、従来の技術に比べて大幅に抑制
され、また含まれる酸化物の最大長さも約１／８とな
り、酸化物の小型化が図れている。As is clear from Table 1, the number of iron oxides contained in the Cu-1% Fe ingot manufactured by the manufacturing method according to the present invention is significantly suppressed as compared with the prior art. The maximum length of the oxide contained is also about ８, and the size of the oxide is reduced.
【００２８】[0028]
【表１】 原料スクラップ 溶 解 出 湯 介在物 介在物 比 率 方 法 方 法 個 数 最大長さ 個／cm 2 μｍ 発明例 ３０％ 真空 加圧注湯 ０．１ ９５ 比較例 ０％ 真空 炉傾動 ３５．６ ８３０ 大気出湯 [Table 1] Raw material scrap melted molten metal Inclusion Inclusion ratio method Inclusion method Number of pieces Maximum length pieces / cm 2 μm Invention example 30% Vacuum pressure pouring 0.1 95 Comparative example 0% Vacuum furnace tilt 35.6 830 atmosphere Hot spring
【００２９】[0029]
【発明の効果】本発明による活性金属を含有する銅合金
の製造方法によれば、不可避的に発生するスラグを巻き
込むことなく連続的に鋳造できるので、従来真空溶解で
は使用できなかったスクラップを原料として溶解して
も、発生したスラグを巻き込むことなく出湯でき、さら
に出湯した溶湯中に含まれる大型酸化物を浮上分離した
溶湯のみを連続鋳造することが可能であるため、活性金
属を含有する銅合金の溶解鋳造が低コストで行え、介在
物の少ない高品質のインゴットを得られる効果がある。According to the method for producing a copper alloy containing an active metal according to the present invention, continuous casting can be performed without involving inevitably generated slag. Even if it is melted, the molten metal can be poured without involving the generated slag, and it is possible to continuously cast only the molten metal in which large oxides contained in the molten metal are floated and separated. There is an effect that the alloy can be melt-cast at low cost and a high-quality ingot with few inclusions can be obtained.
【図１】真空溶解用炉蓋を装着した場合の断面説明図で
ある。FIG. 1 is an explanatory cross-sectional view when a furnace lid for vacuum melting is mounted.
【図２】加圧注湯用炉蓋を装着した場合の断面説明図で
ある。FIG. 2 is an explanatory cross-sectional view when a furnace lid for pressurized pouring is mounted.
１、４０ 継鉄 ２ 加熱コイル ３、４２ ルツボ ４ 誘導溶解炉 ５ 気密容器 ６、４３ 断熱レンガ ７、４３ 耐火キャスタ ８、３７、４６ 溶湯 ９ 真空溶解用炉蓋 １０、２７ 断熱材 １１ パッキン １２、１６、２４ 真空排気配管 １３ 原料投入装置 １４、２２ ゲートバルブ １５ エアーシリンダ １７ 原料投入室扉 １８ 原料投入バケット １９ バケット昇降装置 ２０ 熱電対 ２１ 測温室 ２３ 溶湯測温装置 ２５ 加圧注湯用炉蓋 ２６ 圧力配管 ２８ ボルト ２９ 押さえ金具 ３０ スラグ ３１ 注湯室 ３２ 注湯サイホン ３３ 注湯ノズル ３４ 注湯樋 ３５ 注湯室密閉蓋 ３６ 覗き窓 ３８、５０ ガス配管 ３９ ランスパイプ ４４ タンディッシュ ４７ タンディッシュ密閉蓋 ４８ 鋳造ノズル ４９ ストッパ ５１ 水冷銅鋳型 ５２ インゴット 1, 40 yoke 2 heating coil 3, 42 crucible 4 induction melting furnace 5 airtight container 6, 43 insulating brick 7, 43 refractory caster 8, 37, 46 molten metal 9 furnace lid for vacuum melting 10, 27 heat insulating material 11, packing 12, 16, 24 Vacuum evacuation piping 13 Raw material charging device 14, 22 Gate valve 15 Air cylinder 17 Raw material charging room door 18 Raw material charging bucket 19 Bucket elevating device 20 Thermocouple 21 Temperature measuring chamber 23 Melt temperature measuring device 25 Furnace lid for pressurized pouring 26 Pressure pipe 28 Bolt 29 Holder 30 Slug 31 Pouring chamber 32 Pouring siphon 33 Pouring nozzle 34 Pouring gutter 35 Pouring chamber closed lid 36 Viewing window 38, 50 Gas pipe 39 Lance pipe 44 Tundish 47 Tundish closed lid 48 Casting nozzle 49 Stopper 51 Water-cooled copper mold 52 Ingot
フロントページの続き (56)参考文献 特開 昭61−180669（ＪＰ，Ａ) 特開 昭63−105937（ＪＰ，Ａ) 特開 平１−142016（ＪＰ，Ａ) 特開 平５−192752（ＪＰ，Ａ) 特開 平８−20826（ＪＰ，Ａ) 特開 平７−178515（ＪＰ，Ａ) 特開 平５−309455（ＪＰ，Ａ) 特開 平３−291150（ＪＰ，Ａ) 特開 昭55−128348（ＪＰ，Ａ) 特開 昭62−110851（ＪＰ，Ａ) 特開 昭58−187238（ＪＰ，Ａ) 特公 昭50−40083（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) B22D 11/00 B22D 11/10 C22B 9/04 C22C 1/02 503 Continuation of the front page (56) References JP-A-61-180669 (JP, A) JP-A-63-105937 (JP, A) JP-A-1-142016 (JP, A) JP-A-5-192275 (JP) JP-A-8-20826 (JP, A) JP-A-7-178515 (JP, A) JP-A-5-309455 (JP, A) JP-A-3-291150 (JP, A) JP 55-128348 (JP, A) JP-A-62-110851 (JP, A) JP-A-58-187238 (JP, A) JP-B-50-40083 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) B22D 11/00 B22D 11/10 C22B 9/04 C22C 1/02 503
Claims (7)
る際に、真空排気した気密容器内の誘導溶解炉で原料を
真空溶解した後、前記気密容器へ圧力を印加し、注湯サ
イホンを通して溶湯を連続鋳造鋳型に鋳造することを特
徴とする活性金属を含有する銅合金の製造方法。When melting and casting a copper alloy containing an active metal, a raw material is vacuum-melted in an induction melting furnace in an airtight container that has been evacuated, pressure is applied to the airtight container, and the molten metal is passed through a pouring siphon. A method for producing a copper alloy containing an active metal, comprising casting a molten metal into a continuous casting mold.
能な気密容器を真空排気配管により真空排気し、その後
注湯サイホンを貫通させた加圧注湯用炉蓋に交換して前
記気密容器を密閉し、圧力配管から気密容器内へ圧力を
印加することを特徴とする請求項１記載の活性金属を含
有する銅合金の製造方法。2. An airtight container sealed with a furnace lid for vacuum melting and capable of vacuum evacuation is evacuated by a vacuum exhaust pipe, and then replaced with a furnace lid for pressurized pouring through which a pouring siphon is pierced. The method for producing a copper alloy containing an active metal according to claim 1, wherein the pressure is sealed and pressure is applied from a pressure pipe into the airtight container.
ス雰囲気で溶湯液面が保護された注湯室とし、入口側を
下端が前記誘導溶解炉内の底部に開口した流入部とし、
また出口側を注湯ノズルを備えた鋳型注入部とし、注湯
サイホンを流れる溶湯を実質的に酸化させないことを特
徴とする請求項２記載の活性金属を含有する銅合金の製
造方法。3. An intermediate part of the pouring siphon is a pouring chamber in which a liquid level of the molten metal is protected in an inert gas atmosphere, and an inlet side is an inflow part whose lower end is opened to a bottom part in the induction melting furnace.
3. The method for producing a copper alloy containing an active metal according to claim 2, wherein the outlet side is a mold injection section provided with a pouring nozzle, and the molten metal flowing through the pouring siphon is not substantially oxidized.
湯容器に溜め、その底部に設けた鋳造ノズルから出湯し
た溶湯を連続鋳造することを特徴とする請求項３記載の
活性金属を含有する銅合金の製造方法。4. The active metal according to claim 3, wherein the molten metal discharged from the pouring nozzle is temporarily stored in a receiving vessel, and the molten metal discharged from a casting nozzle provided at the bottom thereof is continuously cast. Copper alloy manufacturing method.
ップを使用することを特徴とする請求項１から４までの
何れか１項記載の活性金属を含有する銅合金の製造方
法。5. The method for producing a copper alloy containing an active metal according to claim 1, wherein scrap is used as at least a part of the molten raw material.
不活性ガスで圧力を印加することを特徴とする請求項２
から５までの何れか１項記載された活性金属を含有する
銅合金の製造方法。6. The pressure in an airtight container sealed with a furnace lid for pressurized pouring is applied with an inert gas.
A method for producing a copper alloy containing an active metal according to any one of claims 1 to 5.
スで保護することを特徴とする請求項３から６までの何
れか１項記載の活性金属を含有する銅合金の製造方法。7. The method for producing a copper alloy containing an active metal according to claim 3, wherein the liquid level of the molten metal in the hot water receiving container is protected by an inert gas. .
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6260447A JP3003914B2 (en) | 1994-10-25 | 1994-10-25 | Method for producing copper alloy containing active metal |
| EP95307543A EP0717119B1 (en) | 1994-10-25 | 1995-10-24 | Method of manufacturing copper alloy containing active metal |
| DE69520779T DE69520779T2 (en) | 1994-10-25 | 1995-10-24 | Process for the production of an active metal-containing copper alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6260447A JP3003914B2 (en) | 1994-10-25 | 1994-10-25 | Method for producing copper alloy containing active metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08120357A JPH08120357A (en) | 1996-05-14 |
| JP3003914B2 true JP3003914B2 (en) | 2000-01-31 |
Family
ID=17348069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6260447A Expired - Fee Related JP3003914B2 (en) | 1994-10-25 | 1994-10-25 | Method for producing copper alloy containing active metal |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0717119B1 (en) |
| JP (1) | JP3003914B2 (en) |
| DE (1) | DE69520779T2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102784981A (en) * | 2011-05-20 | 2012-11-21 | 昆山市瑞捷精密模具有限公司 | Slow-wire-walking electrospark wire-electrode cutting metal wire and manufacture method thereof |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2124960C1 (en) * | 1998-08-04 | 1999-01-20 | Назаров Владимир Николаевич | Gear regulating flow rate of molten metal |
| NO320254B1 (en) | 2003-06-30 | 2005-11-14 | Norsk Hydro As | Method and equipment for continuous or semi-continuous stopping of metal |
| US8030082B2 (en) | 2006-01-13 | 2011-10-04 | Honeywell International Inc. | Liquid-particle analysis of metal materials |
| EP1900458A1 (en) * | 2006-09-15 | 2008-03-19 | Calamari S.p.A. | Casting apparatus for metal materials |
| JP2008290122A (en) * | 2007-05-25 | 2008-12-04 | Hitachi Cable Ltd | Method for producing copper alloy wire |
| CN102632226B (en) * | 2012-03-28 | 2013-04-10 | 攀枝花市立宇矿业有限公司 | Ingot casting method, equipment, accessory and refining and ingot casting integrated production process |
| CN104357698B (en) * | 2014-09-28 | 2016-06-22 | 江苏中容铜业有限公司 | Production system for copper strip substrate of lead frame |
| JP6471553B2 (en) * | 2015-03-18 | 2019-02-20 | 日立金属株式会社 | Casting apparatus and casting method |
| NO341337B1 (en) * | 2015-07-03 | 2017-10-16 | Norsk Hydro As | Equipment for continuous or semi-continuous casting of metal with improved metal filling arrangement |
| CN105499551A (en) * | 2016-02-16 | 2016-04-20 | 山东远大特材科技股份有限公司 | Closed pouring ladle and use method thereof |
| CN105771808A (en) * | 2016-03-02 | 2016-07-20 | 昆明安厦新材料科技有限公司 | Solid raw material liquefying device and technological process |
| KR20190009000A (en) * | 2016-07-28 | 2019-01-25 | 아르코닉 인코포레이티드 | Two-stage melting and casting system and method |
| CN106148782B (en) * | 2016-08-31 | 2017-12-01 | 河钢股份有限公司 | A kind of method of vacuum induction furnace smelting manganin |
| CN110144472B (en) * | 2019-04-30 | 2020-08-07 | 中国科学院合肥物质科学研究院 | Vacuum induction melting method of manganese-copper vibration-damping alloy |
| CN110508768A (en) * | 2019-09-25 | 2019-11-29 | 珠海大华新材料有限公司 | A kind of preparation method of high property copper alloy ingot casting |
| CN110947938A (en) * | 2020-02-26 | 2020-04-03 | 莱州润昇石油设备有限公司 | Vacuum hot shell casting device and working method |
| EP4192640A1 (en) * | 2020-08-06 | 2023-06-14 | SMS Group GmbH | Casting nozzle or casting distributor, assembly and method for heating and/or preheating a casting nozzle |
| DE102021001936A1 (en) * | 2020-11-10 | 2022-05-12 | Franco Procacciante | Device for melting, use and method |
| CN114346190B (en) * | 2021-12-27 | 2022-09-30 | 中南大学 | Alloy manufacturing equipment and copper-based composite material preparation method |
| IT202200006914A1 (en) * | 2022-04-07 | 2023-10-07 | Danieli Off Mecc | SCRAP LOADING DEVICE FOR LOADING SCRAP INTO A CRUCIBLE OF A VACUUM MELTER |
| CN117824356B (en) * | 2024-03-05 | 2024-05-14 | 金昌镍都矿山实业有限公司 | Pure copper smelting furnace and impurity removing process thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE356914B (en) * | 1969-04-15 | 1973-06-12 | Voest Ag | |
| SE384805B (en) * | 1971-06-03 | 1976-05-24 | I Properzi | PROCEDURE AND DEVICE FOR DEGASING AND TRANSMISSION OF MELTED METAL |
| DE2501603B2 (en) * | 1975-01-16 | 1977-08-25 | Institut problem htja Akademn Nauk Ukrainskoj SSR, Kiew (Sowjetunion) | DEVICE FOR VACUUM TREATMENT OF LIQUID METALS |
| JPS60106648A (en) | 1983-11-11 | 1985-06-12 | Mitsubishi Metal Corp | Casting furnace |
| JPH0620618B2 (en) * | 1985-03-26 | 1994-03-23 | 日立電線株式会社 | Continuous casting method and apparatus |
| JPH0631398A (en) * | 1992-07-13 | 1994-02-08 | Kobe Steel Ltd | Production of active metal-containing copper alloy |
| US5421562A (en) * | 1994-04-28 | 1995-06-06 | General Motors Corporation | Gas-shielded siphonic valve |
-
1994
- 1994-10-25 JP JP6260447A patent/JP3003914B2/en not_active Expired - Fee Related
-
1995
- 1995-10-24 DE DE69520779T patent/DE69520779T2/en not_active Expired - Fee Related
- 1995-10-24 EP EP95307543A patent/EP0717119B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102784981A (en) * | 2011-05-20 | 2012-11-21 | 昆山市瑞捷精密模具有限公司 | Slow-wire-walking electrospark wire-electrode cutting metal wire and manufacture method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69520779T2 (en) | 2001-08-09 |
| DE69520779D1 (en) | 2001-05-31 |
| JPH08120357A (en) | 1996-05-14 |
| EP0717119A2 (en) | 1996-06-19 |
| EP0717119B1 (en) | 2001-04-25 |
| EP0717119A3 (en) | 1996-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3003914B2 (en) | Method for producing copper alloy containing active metal | |
| US4248630A (en) | Method of adding alloy additions in melting aluminum base alloys for ingot casting | |
| RU2530578C2 (en) | Flexible electric arc furnace with minimum electric power consumption and method of steel products fabrication | |
| EP2067547A1 (en) | Methods for centrifugally casting highly reactive titanium metals | |
| US20090133850A1 (en) | Systems for centrifugally casting highly reactive titanium metals | |
| US9707621B2 (en) | System for metal atomisation and method for atomising metal powder | |
| EP0697577B1 (en) | Vacuum melting - pressure pouring induction furnace | |
| US5913353A (en) | Process for casting light metals | |
| US3548915A (en) | New procedure for chill casting beryllium composite | |
| US3822735A (en) | Process for casting molten silicon-aluminum killed steel continuously | |
| JPH06263B2 (en) | Continuous casting method | |
| JPH08176810A (en) | Production of aluminum-high melting point metal alloy ingot and target material | |
| US3700026A (en) | Ingot casting apparatus | |
| CN110484742B (en) | Method for preparing Fe-W intermediate alloy by electron beam melting and high purification | |
| JP3176560B2 (en) | Method for removing low melting point metals from cast iron raw materials | |
| JP2794654B2 (en) | Operation method of induction furnace for vacuum melting and pressure pouring | |
| JPS6352983B2 (en) | ||
| JPS58133338A (en) | Method for melting titanium group metal or alloy thereof | |
| CN216159617U (en) | No-drop-height undercurrent casting equipment for vacuum furnace | |
| JPH0531568A (en) | Plasma melting/casting method | |
| CN113613810A (en) | Method for manufacturing steel ingot | |
| CN115808079A (en) | Method and equipment for non-drop height undercurrent casting for vacuum furnace | |
| JP2003340560A (en) | Method and apparatus for manufacturing active metal ingot | |
| WO2024113103A1 (en) | Smelting apparatus for clean and homogenized extra-large steel ingot, and use method | |
| JPH0970656A (en) | Production of metal and alloy cast block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071119 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081119 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081119 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091119 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101119 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101119 Year of fee payment: 11 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101119 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111119 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111119 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121119 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121119 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131119 Year of fee payment: 14 |
|
| LAPS | Cancellation because of no payment of annual fees |