KR100388808B1 - Uranium foil having fine grains solidified rapidly from melt by cooling roll directly, and the fabrication apparatus and the fabrication process - Google Patents
Uranium foil having fine grains solidified rapidly from melt by cooling roll directly, and the fabrication apparatus and the fabrication process Download PDFInfo
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- KR100388808B1 KR100388808B1 KR10-2000-0064237A KR20000064237A KR100388808B1 KR 100388808 B1 KR100388808 B1 KR 100388808B1 KR 20000064237 A KR20000064237 A KR 20000064237A KR 100388808 B1 KR100388808 B1 KR 100388808B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
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- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0697—Accessories therefor for casting in a protected atmosphere
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- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C43/00—Alloys containing radioactive materials
Abstract
본 발명은 냉각 롤에 의해 용탕으로부터 직접 급속응고시켜 미세한 결정립을 가지는 우라늄박판 및 그 제조장치와 제조방법에 관한 것으로, 그 목적은 종래 반복되는 열간압연공정 및 미세등방조직을 만들기 위해 필요한 열처리 등을 포함하는 복잡한 제조공정을 간소화하고, 박판제조의 생산성 및 경제성 향상, 표면 산화방지 및 잔류응력이 제거된 고순도 및 고품질을 가지는 저농축은 물론 고농축의 우라늄 및 우라늄합금 박판과 그 제조장치와 제조방법을 제공하는데 있다.The present invention relates to a uranium thin plate having a fine grain by rapid solidification directly from the molten metal by a cooling roll, and an apparatus and a manufacturing method thereof, the object of which is a conventional hot rolling process and heat treatment necessary to make a fine isotropic structure Simplify the complex manufacturing process including, improve the productivity and economics of thin plate manufacturing, prevent the surface oxidation and remove the residual stress, high concentration and low concentration of high purity uranium and uranium alloy sheet and its manufacturing apparatus and manufacturing method To provide.
본 발명은 우라늄(U) 및 우라늄합금[U-(A)Q-(B)X-(C)Y (Q : Al, Fe, Ni, Si, Cr, Zr 원소, X : Al, Fe, Ni, Si, Cr, Zr 원소, Y : Al, Fe, Ni, Si, Cr, Zr 원소, Q ≠X ≠Y, (A)≤ 1 wt.％, (B) ≤1 wt.％, (C) ≤1 wt.％)] 박판을 진공유도 용해주조, 주괴(ingot) 절단, 열간압연공정 및 열처리공정을 거치지 않고, 단롤(melt spinning)법 또는 쌍롤(twin rolling)법으로 용탕으로부터 직접 주조하는 저농축 또는 고농축 우라늄 및 우라늄합금 박판 및 그 제조장치와 제조방법에 관한 것이다.The present invention relates to uranium (U) and uranium alloys [U- (A) Q- (B) X- (C) Y (Q: Al, Fe, Ni, Si, Cr, Zr elements, X: Al, Fe, Ni , Si, Cr, Zr element, Y: Al, Fe, Ni, Si, Cr, Zr element, Q ≠ X ≠ Y, (A) ≤ 1 wt.%, (B) ≤1 wt.%, (C) ≤1 wt.%)] Low sheet is cast directly from the molten metal by melt spinning or twin rolling without undergoing vacuum-induced melt casting, ingot cutting, hot rolling or heat treatment. The present invention relates to a concentrated or highly concentrated uranium and uranium alloy sheet, and a manufacturing apparatus and a manufacturing method thereof.
Description
본 발명은 냉각 롤(roll)을 사용하여 용탕으로부터 직접 급속응고시킨 우라늄 박판(foil) 및 그 제조장치와 제조방법에 관한 것으로, 특히 우라늄(U) 및 우라늄합금[U-(A)Q-(B)X-(C)Y (Q : Al, Fe, Ni, Si, Cr, Zr 원소, X : Al, Fe, Ni, Si, Cr, Zr 원소, Y : Al, Fe, Ni, Si, Cr, Zr 원소, Q≠X≠Y, (A)≤ 1 wt.％, (B) ≤1 wt.％, (C) ≤1 wt.％)] 박판을 진공유도 용해주조, 주괴(ingot) 절단, 열간압연공정 및 열처리공정을 거치지 않고, 단롤(melt spinning)법 또는 쌍롤(twin rolling)법으로 용탕으로부터 직접 주조하는 저농축 또는 고농축 우라늄 및 우라늄합금 박판 및 그 제조장치와 제조방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a uranium foil which is rapidly solidified directly from a molten metal using a cooling roll, a manufacturing apparatus thereof, and a manufacturing method thereof. In particular, uranium (U) and uranium alloy [U- (A) Q- ( B) X- (C) Y (Q: Al, Fe, Ni, Si, Cr, Zr element, X: Al, Fe, Ni, Si, Cr, Zr element, Y: Al, Fe, Ni, Si, Cr , Zr element, Q ≠ X ≠ Y, (A) ≤ 1 wt.%, (B) ≤1 wt.%, (C) ≤1 wt.%)] Vacuum-induced melt casting and ingot cutting The present invention relates to a low-concentration or high-concentration uranium and uranium alloy sheet, and a manufacturing apparatus and a manufacturing method thereof, which are cast directly from the molten metal by a single spinning method or a twin rolling method without undergoing a hot rolling process and a heat treatment process.
우라늄 또는 우라늄합금을 제조한 후 주괴를 절단, 열간압연하여 우라늄박판을 제조하는 종래 방법은 우라늄 또는 우라늄합금 주괴를 진공 유도용해로에서 1300℃ 정도에서 등온유지 후 진공주조하여, 봉 형태의 주괴를 적당한 크기로 절단하여, 600℃ 이상의 고온에서 불활성 분위기 하에서 열간압연을 계속 수행하여, 점차 주괴 두께를 얇게 하여 최종적으로 100∼200㎛의 얇은 우라늄 박판을 만들고, 다시 박판 제조 후 조사중에 우라늄 박판의 과다한 팽윤을 방지하기 위해 미세한 등방적인 결정립 조직을 얻는 진공 중 800℃ 정도에서 열처리 및 소입을 수행하여야 하는 등 그 제조공정이 복잡하다는 문제점이 있다.The conventional method of manufacturing uranium thin plate by manufacturing uranium or uranium alloy and then cutting and hot rolling the ingot is performed by isothermally holding the uranium or uranium alloy ingot at about 1300 ℃ in a vacuum induction furnace, and then vacuum casting the rod-shaped ingot. After cutting to size, hot rolling was continued under an inert atmosphere at a high temperature of 600 ° C. or higher, gradually reducing the thickness of the ingot to finally form a thin uranium thin plate having a thickness of 100 to 200 μm. There is a problem in that the manufacturing process is complicated, such as heat treatment and quenching should be performed at about 800 ℃ in a vacuum to obtain a fine isotropic grain structure to prevent the.
보다 자세히 문제점을 설명하면 다음과 같다.The problem is described in more detail as follows.
우라늄이나 우라늄합금은 강하고 연성이 부족하기 때문에, 우라늄박판을 만드는 열간압연공정은 압연가공이 힘들다. 또한 압연공정중에 우라늄에 잔존해 있는 잔류응력으로 인해 우라늄박판내에 균열이 생겨 손상된 박판이 만들어지므로 회수율이 낮다. 또한 표적 박판원료인 저농축은 물론 고농축 우라늄은 매우 고가이므로 이러한 제조방법은 경제적 손실이 크게 된다.Since uranium and uranium alloys are strong and lack ductility, the hot rolling process of making uranium thin plates is difficult to roll. In addition, due to the residual stress remaining in the uranium during the rolling process, cracks are generated in the uranium thin plate, which leads to low recovery rate. In addition, low concentration as well as high concentration of uranium, the target thin plate material is very expensive, such a manufacturing method is a large economic loss.
우라늄은 산화성물질이므로 진공이나 불활성 분위기에서 가열하고 열간압연을 하여야 한다. 또한 우라늄 주괴 두께를 조정하기 위해 수 차례 계속되는 열간 압연과정은 번거로울 뿐 만 아니라 긴 시간이 소요되므로 생산성이 매우 낮다.Since uranium is an oxidizing material, it should be heated and hot rolled in a vacuum or inert atmosphere. In addition, several continuous hot rolling processes to adjust the uranium ingot thickness are not only cumbersome but also take a long time, resulting in very low productivity.
한편, 우라늄박판은 우라늄 주괴로부터 수회의 열간압연으로 인해 잔류응력을 가지지 있고 박판제조 중이나 조사과정 중의 열 순환(thermal cycling)에 의한 변형이나 파손이 생길 수 있다. 또한 변형영역이나 균열은 조사집합체내 고정관과의 반응방지 보호막으로 사용되는 Al, Ni 등의 도금층과의 반응을 촉진시키는 침투경로가 된다.On the other hand, the uranium sheet has a residual stress due to several hot rolling from the uranium ingot and may cause deformation or breakage due to thermal cycling during sheet production or irradiation. Deformation areas and cracks also serve as penetration paths for promoting reaction with plating layers of Al and Ni, which are used as protective films for preventing reaction with the fixed tube in the irradiation assembly.
또한 제조된 우라늄 박판은 압연시에 혼입된 표면산화물 등 불순물을 제거하기 위해 부수적으로 세척/건조공정이 필요하다. 조사중에 표적 박판이 팽창하므로 미세한 등방의 결정립 조직을 얻기 위해 진공 중에서 열처리하여 소입하여야 한다는 등의 여러 문제점이 있다.In addition, the manufactured uranium thin plate additionally needs a washing / drying process to remove impurities such as surface oxides mixed during rolling. Since the target thin plate expands during irradiation, there are several problems such as heat treatment in vacuum to harden to obtain fine isotropic grain structure.
상기와 같은 문제점을 해결하기 위한 본 발명의 목적은 종래 반복되는 열간압연공정 및 미세등방조직을 만들기 위해 필요한 열처리 등을 포함하는 복잡한 제조공정을 간소화하고, 박판제조의 생산성 및 경제성 향상, 표면 산화방지 및 잔류응력이 제거된 고순도 및 고품질을 가지는 저농축은 물론 고농축의 우라늄 및 우라늄합금 박판과 그 제조장치와 제조방법을 제공하는데 있다.An object of the present invention for solving the above problems is to simplify the complex manufacturing process, including the conventional repeated hot rolling process and the heat treatment necessary to make the micro-isotropic structure, and to improve the productivity and economical efficiency of thin plate manufacturing, surface oxidation The present invention provides a highly concentrated uranium and uranium alloy sheet, and a manufacturing apparatus and a manufacturing method thereof, as well as a low concentration having high purity and high quality, which is prevented and residual stress is removed.
상기와 같은 본 발명은 쌍롤(twin rolling) 법 또는 단롤(melt spinning)법에 의해 합금용탕으로부터 직접 급속응고시켜 만든 얇은 우라늄박판 및 그 제조장치와 제조방법을 제공함으로서 달성된다.The present invention as described above is accomplished by providing a thin uranium thin plate made by rapid solidification directly from the molten alloy by a twin rolling method (melt spinning) method or a manufacturing apparatus and a manufacturing method thereof.
보다 자세히 설명하자면 저농축 또는 고농축의 우라늄과 금속원료를 칭량하여 슬롯(slot)이 있는 용탕공급기(tundish)가 부착된 내열도가니내로 장입하고, 상기 내열도가니를 진공 챔버 내부에 설치한 다음, 진공펌프를 이용하여 내열도가니가 설치된 분무장치의 챔버 내부를 10-3torr 이상의 진공도로 유지하고, 상기 내열도가니 내로 장입된 우라늄과 금속원료를 고주파전류 발생장치를 이용하여 용해시키며, 상기 용해된 합금용탕을 용탕공급기(tundish)에 유입하면 슬롯(slot)을 통해, 전기 모터로 회전되는, 냉각 롤(roll)에 공급하면서 아르곤 또는 헬륨 냉각가스 등 불활성 분위기 중에서 급속응고시킨 우라늄 박판을 만드는 제조장치와 그 제조방법을 제공함으로써 달성된다.More specifically, low or high concentration of uranium and metal raw materials are weighed into a heat-resistant crucible with a slotted tungsten, and the heat-resistant crucible is installed in a vacuum chamber, and then a vacuum pump Maintain the inside of the chamber of the spray apparatus in which the heat-resistant crucible is installed with a vacuum of 10 -3 torr or more, dissolve uranium and metal raw materials charged into the heat-resistant crucible using a high-frequency current generator, and melt the molten alloy molten metal. Manufacturing apparatus for making uranium sheet which rapidly solidified in an inert atmosphere such as argon or helium cooling gas while being supplied to a cooling roll, which is rotated by an electric motor through a slot when entering a tundish, and its manufacture By providing a method.
도 1 은 본 발명에 따른 구성을 보인 박판 제조장치의 개략도이다.1 is a schematic view of a sheet manufacturing apparatus showing a configuration according to the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
(1) : 슬롯(slot)(nozzle) (2) : 내열도가니(1): slot (nozzle) (2): heat resistant crucible
(3) : 유도코일 (3) : 챔버(chamber)(3): Induction coil (3): Chamber
(5) : 진공펌프 시스템 (6) : 롤(roll)(5): vacuum pump system (6): roll
(7) : 가스공급밸브 (8) : 회수용기(7): Gas supply valve (8): Recovery container
(9) : 출탕봉(stopper) (10) : 우라늄 박판(9): stopper (10): uranium sheet
상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 과제를 수행하는 본 발명의 실시예인 구성과 그 작용을 첨부도면에 연계시켜 상세히 설명하면 다음과 같다.When described in detail with reference to the accompanying drawings, the configuration and the operation of the embodiment of the present invention to achieve the object as described above and to perform the task for eliminating the conventional drawbacks.
도 1 은 본 발명에 따른 구성을 보인 롤(roll)사용 박판제조장치의 개략도를 도시한 것으로, 본 발명의 구성은Figure 1 shows a schematic diagram of a roll using thin plate manufacturing apparatus showing a configuration according to the present invention, the configuration of the present invention
슬롯(slot)(1)이 있는 용탕공급기(tundish)가 부착된 내열도가니(2)와,A heat-resistant crucible (2) with a tundish with a slot (1) attached thereto,
상기 도가니(2)내의 온도를 상승시키는 고주파전류 발생장치(도시없음)으로부터 연결된 유도코일(3)과,An induction coil 3 connected from a high frequency current generator (not shown) for raising the temperature in the crucible 2,
챔버(4)내부에 적절한 진공도를 형성하는 진공펌프 시스템(5)과,A vacuum pump system 5 for forming an appropriate degree of vacuum inside the chamber 4,
상기 챔버(4)내에 설치되는 롤(6)과,A roll 6 installed in the chamber 4,
챔버(4)내로 가스를 공급하는 가스공급밸브(7)와,A gas supply valve 7 for supplying gas into the chamber 4,
제조된 박판이 수집되는 회수용기(8)로 구성되어 있다.It consists of a recovery container 8 in which the manufactured thin plates are collected.
상기 내열도가니(2)는 우라늄 및 금속원료가 장입되는 곳으로, 하부에 슬롯(slot)(1)을 구비하고 챔버(4) 상부에 설치되며, 내부에 출탕봉(9)이 설치되어 있다.The heat-resistant crucible 2 is a place where uranium and metal raw materials are charged. The heat-resistant crucible 2 is provided with a slot 1 at the bottom and is installed at the top of the chamber 4, and a tapping rod 9 is installed therein.
상기 유도코일(3)는 내열 도가니(1)에 설치되는 것으로, 고주파 전류로 용해온도 보다 약 200℃ 이상 용탕을 과열(superheating)시킨다.The induction coil 3 is installed in the heat-resistant crucible 1 and superheats the molten metal by about 200 ° C. or more than the melting temperature with a high frequency current.
상기 진공펌프 시스템(5)는 챔버(4) 내부가 10-3torr 이상의 적절한 진공도를 형성하도록 하는 것으로, 챔버(4) 일측과 연결 설치되어 있다.The vacuum pump system 5 is such that the inside of the chamber 4 forms an appropriate degree of vacuum of 10 −3 torr or more, and is connected to one side of the chamber 4.
상기 롤(6)은 슬롯(slot)(1)의 하부에 슬롯(slot)(1)과 동일 중심선을 구비하고, 챔버(4) 내에 설치되는 것으로, 전기모터(도시없음)에 의해 작동되어 슬롯(slot)(1)을 통해 챔버(4) 내로 토출되는 합금용탕을 얇은 우라늄박판으로 형성한다.The roll 6 has the same centerline as the slot 1 in the lower part of the slot 1, and is installed in the chamber 4, and is operated by an electric motor (not shown) to be slotted. The molten alloy discharged into the chamber 4 through the slot 1 is formed into a thin uranium thin plate.
즉, 상기 슬롯(slot)(1)을 통해 공급되는 합금용탕은, 전기모터에 의해 작동되는, 롤(roll)에 의해 제조되는 얇은 우라늄박판을 아르곤 또는 헬륨 냉각가스 등 불활성 분위기 중에서 급속응고 시켜서 만든다.That is, the molten alloy supplied through the slot 1 is made by rapidly solidifying a thin uranium thin plate manufactured by a roll operated by an electric motor in an inert atmosphere such as argon or helium cooling gas. .
상기 가스공급밸브(7)는 챔버(4)와 연결 설치되는 것으로, 챔버(4)내로 불활성 아르곤 또는 헬륨 냉각가스를 공급하여 냉각 롤(6)에 의해 제조된 얇은 우라늄박판을 급속응고시킨다.The gas supply valve 7 is installed in connection with the chamber 4, and supplies inert argon or helium cooling gas into the chamber 4 to rapidly solidify the thin uranium sheet produced by the cooling roll 6.
이때 상기 가스공급밸브(7)에 의해 챔버(4)내로 유입되는 불활성 아르곤 또는 헬륨 냉각가스는 챔버(4)내 상부에 설치되는 가스슬롯(slot)에 의해 챔버(4)내로 분사된다.At this time, the inert argon or helium cooling gas introduced into the chamber 4 by the gas supply valve 7 is injected into the chamber 4 by a gas slot installed in the upper portion of the chamber 4.
상기 회수용기(8)는 챔버(4)내에서 형성된 얇은 박판을 수집하는 것으로, 챔버(4) 하단부에 설치되어 제조되는 박판(10)을 수집한다.The recovery container 8 collects a thin thin plate formed in the chamber 4, and collects the thin plate 10 installed at the lower end of the chamber 4.
이와 같이 구성된 본 발명의 바람직한 실시예를 상세히 설명하면 다음과 같다.Referring to the preferred embodiment of the present invention configured as described above in detail.
<실시예1>Example 1
저농축 또는 고농축 우라늄 박판 제조시, 우라늄원료를 슬롯(slot)(1)이 부착된 내열도가니(2)에 장입한 다음, 박판제조장치에 도가니(2) 및 단열재(도시없음)를 순서대로 조립한다.In manufacturing low or high concentration uranium sheet, uranium raw material is charged into heat-resistant crucible (2) with slot (1), and then the crucible (2) and insulation (not shown) are assembled in the sheet manufacturing apparatus in order. do.
이때 진공펌프시스템(5)을 이용하여 상기 도가니(2)가 조립된 박판제조장치의 장치 챔버내부가 10-3torr 이상으로 적절한 진공도를 유지하도록 한다.At this time, the inside of the apparatus chamber of the thin-plate manufacturing apparatus in which the crucible 2 is assembled using the vacuum pump system 5 is maintained at an appropriate degree of vacuum of 10 -3 torr or more.
이와 같이 도가니(2) 및 단열재가 순서대로 박판제조장치에 조립되면 유도코일(3)을 작동시켜 고주파 전류로 용해온도 보다 약 200℃ 이상으로 용량을 과열시킨 다음, 전기모터(도시없음)를 이용하여 롤(6)을 약 300 rpm까지 회전시킨다.Thus, when the crucible 2 and the heat insulator are assembled in the sheet manufacturing apparatus in order, the induction coil 3 is operated to overheat the capacity at about 200 ° C. or higher than the melting temperature by using a high frequency current, and then use an electric motor (not shown). The roll 6 is rotated to about 300 rpm.
상기 전기모터에 의해 작동되는 롤(6)의 회전속도가 약 300 rpm으로 안정되면 도가니(2)내에 설치된 출탕봉(9)을 상부방향으로 들어올려 도가니(2)내에서 용해된 합금용탕을 출탕한다.When the rotation speed of the roll 6 operated by the electric motor is stabilized at about 300 rpm, the tapping rod 9 installed in the crucible 2 is lifted upward to tap the molten alloy molten in the crucible 2. do.
상기 출탕된 합금용탕은 폭 1mm 정도의 슬롯(slot)(1)을 통과하여 300 rpm 정도로 고속 회전하는 롤(6)에 공급되어 얇은 박판(10)이 형성된다.The melted alloy molten metal is passed through a slot 1 having a width of about 1 mm and supplied to a roll 6 rotating at a high speed of about 300 rpm to form a thin thin plate 10.
이때 가스공급밸브(7)를 작동하여 챔버(4)내로 불활성 아르곤 또는 헬륨 냉각가스를 분사하면, 롤(6)에 의해 제조된 박판(10)은 불활성 아르곤 또는 헬륨 냉각가스에 의해 급속응고(103℃/초 이상) 된다.In this case, when the inert argon or helium cooling gas is injected into the chamber 4 by operating the gas supply valve 7, the thin plate 10 manufactured by the roll 6 is rapidly solidified by the inert argon or helium cooling gas (10). 3 ° C / sec or more).
이와 같이 롤법에 의해 박판으로 응고될 때 급속응고 효과에 의해 바로 상온에서 미세하고 불규칙적인 방향성을 가지는 우라늄 결정립이 얻어지기 때문에, 우라늄 열간압연에 의한 박판제조시 800℃ 정도에서 유지후 소입시켜주는 미세한 결정립을 가지기 위한 열처리공정이 불필요하게 된다.Thus, when solidified into thin plate by the roll method, uranium grains having a fine and irregular directionality are obtained at room temperature immediately by the rapid solidification effect, so that after quenching and holding at about 800 ° C. during uranium hot rolling, There is no need for a heat treatment step to have crystal grains.
이렇게 제조된 박판은 챔버(4)하부에 설치된 회수용기(8)내로 수집된다.The thin plates thus produced are collected into a recovery vessel 8 installed below the chamber 4.
상기 회수용기(8)에 수집되는 박판 두께는 약 125 ㎛이고, 적정두께범위의 박판 회수율은 90% 이상 얻어진다.The thickness of the thin plate collected in the recovery container 8 is about 125 μm, and the recovery rate of the thin plate in the appropriate thickness range is obtained by 90% or more.
상기와 같이 제조된 저농축 또는 고농축 우라늄 박판은 조사집합체내 내부고정관의 외부표면에 설치된다.The low concentration or high concentration uranium sheet produced as described above is installed on the outer surface of the inner fixing tube in the irradiation assembly.
그 다음 우라늄 박판으로 덮인 내부 고정관은 외부관내로 밀어 끼워진다.The inner fixation tube covered with the uranium sheet is then pushed into the outer tube.
끼워진 두 관(tube)은 홀(hole)이 있는 다이(die)에 넣고 내부관내에 플러그(plug)를 강제로 밀어 넣어서, 내부관은 소성적으로 팽창하고 외부관은 탄성적으로 팽창하여 우라늄 박판이 두 관 사이에서 꽉 조립되어, 양호한 열전달이 이루어지게 한다.The two inserted tubes are placed in a die with holes, forcibly pushing a plug into the inner tube so that the inner tube is plastically expanded and the outer tube is elastically expanded so that the uranium sheet Tightly assembled between these two tubes, good heat transfer is achieved.
이와 같이 제조된 표적은 인서트 리그(insert rig)를 사용하여 원자로에 삽입된다.The target thus prepared is inserted into the reactor using an insert rig.
<실시예 2><Example 2>
또한 본 발명은 저농축 또는 고농축 우라늄을 포함하는 우라늄합금[U-(A)Q-(B)X-(C)Y (Q : Al, Fe, Ni, Si, Cr, Zr 원소, X : Al, Fe, Ni, Si, Cr, Zr 원소, Y : Al, Fe, Ni, Si, Cr, Zr 원소, Q ≠X ≠Y, (A)≤ 1 wt.％, (B) ≤1 wt.％, (C) ≤1 wt.％)] 박판으로 만들어지는 조사표적에 대하여 응용할 수 있다.In addition, the present invention is a uranium alloy containing a low or high concentration of uranium [U- (A) Q- (B) X- (C) Y (Q: Al, Fe, Ni, Si, Cr, Zr element, X: Al , Fe, Ni, Si, Cr, Zr element, Y: Al, Fe, Ni, Si, Cr, Zr element, Q ≠ X ≠ Y, (A) ≤ 1 wt.%, (B) ≤1 wt.% , (C) ≤1 wt.%)] It is applicable to the irradiation target made of sheet metal.
즉, U - 500ppm Fe - 1200 ppm Al - 500ppm Ni 합금 박판 제조시, 우라늄과 합금원소 Fe, Al 및 Ni 금속원료를 합금조성에 맞게 칭량하여 흑연도가니에 장입한 다음, U - 500ppm Fe - 1200 ppm Al - 500ppm Ni 합금의 박판제조과정과 같이 진공펌프시스템(5)을 사용하여 분무장치 챔버(4) 내부 진공도를 10-2torr 이상 형성되도록 한다.In other words, when manufacturing U-500ppm Fe-1200ppm Al-500ppm Ni alloy sheet, uranium and alloying elements Fe, Al and Ni metal raw materials are weighed according to the alloy composition and charged into a graphite crucible, and then U-500ppm Fe-1200 ppm As in the thin plate manufacturing process of Al-500ppm Ni alloy, the vacuum pump system 5 is used to form a vacuum degree of 10 -2 torr or more in the spray chamber 4.
이와 같이 도가니(2) 및 단열재가 순서대로 박판제조장치에 조립되면 유도코일(3)을 작동시켜 고주파 전류로 용해온도 보다 약 200℃ 이상으로 용량을 과열시킨 다음, 전기모터를 이용하여 롤(6)을 약 300 rpm 까지 회전시킨다.When the crucible 2 and the heat insulator are assembled in the sheet-making apparatus in this manner, the induction coil 3 is operated to overheat the capacity at about 200 ° C. or higher than the melting temperature with a high frequency current, and then the roll 6 is used using an electric motor. ) To about 300 rpm.
상기 전기모터에 의해 작동되는 롤(6)의 회전속도가 약 300 rpm으로 안정되면 도가니(2)내에 설치된 출탕봉(9)을 상부방향으로 들어올리어 도가니(2)내에서 용해된 합금용탕을 출탕한다.When the rotational speed of the roll 6 operated by the electric motor is stabilized at about 300 rpm, the tapping rod 9 installed in the crucible 2 is lifted upwards to tap the molten alloy molten in the crucible 2. do.
상기 출탕된 합금용탕은 폭 1.2mm 정도의 슬롯(slot)(1)을 통과하여 300 rpm 정도로 고속·회전하는 롤(6)에 공급되어 얇은 박판(10)이 형성된다.The melted alloy molten metal is passed through a slot 1 having a width of about 1.2 mm and supplied to a roll 6 that rotates at high speed and about 300 rpm to form a thin thin plate 10.
이때 가스공급밸브(7)를 작동하여 챔버(4)내로 불활성 아르곤 또는 헬륨 냉각가스를 분사하면, 롤(6)에 의해 제조된 박판은 불활성 아르곤 또는 헬륨 냉각가스에 의해 급속응고(103℃/초 이상) 된다.At this time, when the inert argon or helium cooling gas is injected into the chamber 4 by operating the gas supply valve 7, the sheet produced by the roll 6 is rapidly solidified by the inert argon or helium cooling gas (10 3 ° C. / Seconds or more).
이와 같이 롤법에 의해 분무시 급속응고 효과에 의해 바로 상온에서 미세한 우라늄 결정립이 얻어지기 때문에, 우라늄 열간압연에 의한 박판제조시 850℃ 정도에서 유지후 소입시켜주는 미세한 결정립을 가지기 위한 열처리공정이 불필요하게 된다.In this way, the fine uranium crystal grains are immediately obtained at room temperature due to the rapid solidification effect when spraying by the roll method. do.
이렇게 제조된 박판은 챔버(4)하부에 설치된 회수용기(8)내로 수집된다. 상기 회수용기(8)에 수집되는 박판 두께는 약 150㎛ 정도이고, 적정두께범위의 박판 회수율은 90% 이상 얻어진다.The thin plates thus produced are collected into a recovery vessel 8 installed below the chamber 4. The thickness of the thin plate collected in the recovery container 8 is about 150 μm, and the recovery rate of the thin plate in the appropriate thickness range is obtained by 90% or more.
상기와 같이 제조된 저농축 또는 고농축 우라늄 박판은 조사집합체내 내부고정관의 외부표면에 설치된다.The low concentration or high concentration uranium sheet produced as described above is installed on the outer surface of the inner fixing tube in the irradiation assembly.
그 다음 우라늄 박판으로 덮인 내부 고정관은 외부관내로 밀어 끼워진다.The inner fixation tube covered with the uranium sheet is then pressed into the outer tube.
끼워진 두 관(tube)은 홀(hole)이 있는 다이(die)에 넣고 내부관내에 플러그(plug)를 강제로 밀어 넣어 내부관을 확관시켜 보다 양호한 접촉이 이루어진게 한다.The inserted two tubes are placed in a die with a hole, and the plug is forcibly pushed into the inner tube to expand the inner tube to make a better contact.
다이 제거 후에 표적의 양단은 용접으로 밀봉하여 조사표적(irradiation target)을 제조한다.After die removal, both ends of the target are sealed by welding to produce an irradiation target.
본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와같은 변경은 청구범위 기재의 범위 내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.
이와 같이 본 발명은 저농축 또는 고농축 우라늄 또는 우라늄합금 주괴를 얻기 위한 진공유도용해공정, 얇은 박판을 얻기 위한 수회의 열간압연공정, 압연시에 혼입된 표면산화물 등 불순물을 제거하기 위한 세척/건조공정, 미세한 등방적인 결정립조직을 얻기 위한 열처리공정을 제거할 수 있어 종래의 박판 제조방법에 비해 박판 제조공정이 훨씬 단축된다.As described above, the present invention is a vacuum induction melting process for obtaining low or high concentration of uranium or uranium alloy ingot, several hot rolling processes for obtaining a thin sheet, and a washing / drying process for removing impurities such as surface oxides mixed during rolling. In addition, the heat treatment process for obtaining a fine isotropic grain structure can be eliminated, so that the thin plate manufacturing process is much shorter than the conventional thin plate manufacturing method.
우라늄 또는 우라늄합금을 용해하고, 그 용탕을 바로 급냉하여 직접 박판을 제조하므로, 강인한 성질을 가져서 압연이 힘든 우라늄에 대해 박판제조가 훨씬 용이하다.Since uranium or uranium alloy is melted and the molten metal is quenched directly to prepare a thin plate directly, thin plate manufacturing is much easier with respect to uranium, which has tough properties and is difficult to roll.
우라늄주괴 두께를 조정하기 위해 여러 차례 계속되는 종래의 열간압연과정은 번거로울 뿐 만 아니라 긴 시간이 소요되나, 한번에 급냉하여 다량의 박판을 수 분내에 만들 수 있으므로 생산성이 매우 우수하다.The conventional hot rolling process, which is repeated several times to adjust the thickness of the uranium ingot, is not only cumbersome but also takes a long time, but it is excellent in productivity because it can be rapidly cooled at a time to make a large amount of thin plates in minutes.
또한 우라늄은 연성이 부족하기 때문에, 수 회의 압연도중에 판상 우라늄에 잔존해 있는 잔류응력으로 인해 우라늄박판내에 균열이 생긴 손상된 박판이 만들어지고 회수율과 경제성이 낮다.In addition, because uranium is poor in ductility, damaged stresses remaining in plate-like uranium during several rollings result in damaged thin plates that are cracked in uranium thin plates and have low recovery and economic efficiency.
그러나 상기 본 발명의 급속응고에 의한 박판제조방법은 수율이 90% 이상되며, 수 분내에 수 kg을 바로 제조할 수 있으므로, 회수율과 경제성이 매우 높다.However, the thin plate manufacturing method according to the rapid solidification of the present invention has a yield of 90% or more, and can produce a few kg in a few minutes, recovery and economical efficiency is very high.
더구나 박판원료인 저농축 우라늄 뿐만 아니라 고농축우라늄은 매우 고가이므로 이러한 제조방법은 경제적 이득이 매우 크다.In addition, low-enriched uranium, which is a thin raw material, as well as high-enriched uranium is very expensive, so this manufacturing method is very economical.
또한, 단롤법 또는 쌍롤법에 의해 합금 용탕으로부터 직접 제조된 박판은 우라늄 주괴로부터 수회의 열간압연으로 얻어진 박판에 비해 거의 잔류응력을 가지지 않아서 박판제조 중이나 조사과정 중의 열 순환(thermal cycling)에 의한 변형이나 파손이 방지될 수 있다. 이와 같이 생긴 변형영역이나 균열은 조사 집합체내 우라늄 고정관과의 반응을 방지하는데 사용되는 Al, Ni 등의 도금층과의 반응을 촉진시키는 침투경로가 된다, 급속응고에 의해 제조된 박판은 이와 같은 침투경로가 거의생성되지 않는다. 우라늄박판은 원자로내에서 우라늄의 이방적 조사성장거동에 의해 크게 팽윤한다. 급속응고법에 의해 제조된 우라늄 박판은 균일하고 미세하며 불규칙적인 방향성을 가지는 결정립 조직을 가져서 조사중 우라늄박판이 크게 팽윤하는 것을 방지해 준다.In addition, the sheet produced directly from the molten alloy by the single roll method or the twin roll method has little residual stress as compared with the sheet obtained by several hot rolling from the uranium ingot, so that deformation due to thermal cycling during sheet production or irradiation Or damage can be prevented. The deformation zone and cracks thus formed are penetration paths for promoting the reaction with the plating layer of Al and Ni used to prevent the reaction with the uranium holding tube in the irradiation assembly. The thin plate manufactured by rapid solidification is such a penetration path. Is hardly produced. Uranium thin plates are greatly swollen by the anisotropic irradiation growth behavior of uranium in the reactor. The uranium thin plate produced by the rapid solidification method has a grain structure having uniform, fine and irregular directionality to prevent the uranium thin plate from greatly swelling during irradiation.
Claims (3)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2000-0064237A KR100388808B1 (en) | 2000-10-31 | 2000-10-31 | Uranium foil having fine grains solidified rapidly from melt by cooling roll directly, and the fabrication apparatus and the fabrication process |
| US09/836,478 US20020050335A1 (en) | 2000-10-31 | 2001-04-18 | Fabrication process of uranium foil having fine grains solidified rapidly from melt using cooling roll, and the fabrication apparatus |
| JP2001137669A JP3416660B2 (en) | 2000-10-31 | 2001-05-08 | Manufacturing method of uranium sheet |
| CA002347209A CA2347209C (en) | 2000-10-31 | 2001-05-09 | Fabrication process of uranium foil having fine grains solidified rapidly from melt using cooling roll, and the fabrication apparatus |
| CNB011208910A CN1212908C (en) | 2000-10-31 | 2001-06-07 | Method and apparatus for manufacturing uranium foils containing fine crystals |
| EP01204159A EP1203832B1 (en) | 2000-10-31 | 2001-10-30 | Fabrication process of uranium foil having fine grains solidified rapidly from melt using roll, and the fabrication apparatus |
| US10/393,978 US6860317B2 (en) | 2000-10-31 | 2003-03-24 | Method and apparatus for producing uranium foil and uranium foil produced thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2000-0064237A KR100388808B1 (en) | 2000-10-31 | 2000-10-31 | Uranium foil having fine grains solidified rapidly from melt by cooling roll directly, and the fabrication apparatus and the fabrication process |
Publications (2)
| Publication Number | Publication Date |
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| KR20020033961A KR20020033961A (en) | 2002-05-08 |
| KR100388808B1 true KR100388808B1 (en) | 2003-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR10-2000-0064237A KR100388808B1 (en) | 2000-10-31 | 2000-10-31 | Uranium foil having fine grains solidified rapidly from melt by cooling roll directly, and the fabrication apparatus and the fabrication process |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20020050335A1 (en) |
| EP (1) | EP1203832B1 (en) |
| JP (1) | JP3416660B2 (en) |
| KR (1) | KR100388808B1 (en) |
| CN (1) | CN1212908C (en) |
| CA (1) | CA2347209C (en) |
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|---|---|---|---|---|
| KR100470935B1 (en) * | 2002-07-30 | 2005-02-21 | 한국수력원자력 주식회사 | Transfer apparatus of uranium rod |
| KR100485926B1 (en) * | 2002-06-24 | 2005-04-29 | 한국수력원자력 주식회사 | Method and apparatus for Continuous casting of uranium rod |
| KR100467440B1 (en) * | 2002-07-30 | 2005-01-24 | 한국수력원자력 주식회사 | Cutting apparatus of uranium rod |
| JP2006500219A (en) * | 2002-09-27 | 2006-01-05 | ポステック ファンデーション | Method and apparatus for producing amorphous alloy sheet, and amorphous alloy sheet produced using the same |
| KR100557823B1 (en) * | 2003-03-31 | 2006-03-10 | 한국원자력연구소 | Method and apparatus for fabricating uranium foil, and uranium foil fabricated thereby |
| US7100670B1 (en) * | 2003-09-12 | 2006-09-05 | The United States Of America As Represented By The United States Department Of Energy | Method for fabricating uranium foils and uranium alloy foils |
| KR100666702B1 (en) * | 2005-05-04 | 2007-01-11 | 동아대학교 산학협력단 | Fabrication device of rheology material by using vacuum chamber |
| CN103658573B (en) * | 2013-12-09 | 2015-06-03 | 武汉钢铁(集团)公司 | Liquid alloy vacuum melting single-roller melt-spinning method and device |
| KR101640237B1 (en) | 2015-04-28 | 2016-07-22 | 한국원자력연구원 | Manufacturing method of uranium aluminide powder and uranium aluminide powder using thereof |
| CN105689660B (en) * | 2016-02-26 | 2017-11-28 | 沈阳广泰真空科技有限公司 | A kind of two-sided cooling multifunctional efficient vacuum rapid hardening furnace |
| WO2018031823A1 (en) | 2016-08-10 | 2018-02-15 | Nucor Corporation | Method of thin strip casting |
| CN108213389A (en) * | 2017-12-29 | 2018-06-29 | 安徽高德铝业有限公司 | A kind of door and window aluminium alloy extrusions processing technology of vacuum pouring forming |
| CN108637197A (en) * | 2018-05-24 | 2018-10-12 | 钢铁研究总院 | A kind of big heat size, high-efficiency and continuous prepare the vacuum quick quenching device and method of amorphous band |
| RU2760902C1 (en) * | 2021-05-11 | 2021-12-01 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" | Uranium-based alloy (options) |
| CN114309505B (en) * | 2021-12-17 | 2023-01-10 | 北京科技大学 | Metal thin strip continuous casting method adopting momentum flow distribution |
| CN115094351B (en) * | 2022-07-05 | 2023-01-24 | 西安交通大学 | Depleted uranium-based hydrogen absorption and storage alloy and method |
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- 2001-05-08 JP JP2001137669A patent/JP3416660B2/en not_active Expired - Fee Related
- 2001-05-09 CA CA002347209A patent/CA2347209C/en not_active Expired - Fee Related
- 2001-06-07 CN CNB011208910A patent/CN1212908C/en not_active Expired - Fee Related
- 2001-10-30 EP EP01204159A patent/EP1203832B1/en not_active Expired - Lifetime
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| JPS60111744A (en) * | 1983-11-24 | 1985-06-18 | Nec Corp | Quick cooling device for liquid |
| JPH01271039A (en) * | 1988-04-20 | 1989-10-30 | Mitsubishi Electric Corp | Manufacture of thin berylium-copper sheet |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP1203832B1 (en) | 2004-08-11 |
| EP1203832A3 (en) | 2002-05-15 |
| US20020050335A1 (en) | 2002-05-02 |
| JP3416660B2 (en) | 2003-06-16 |
| CN1212908C (en) | 2005-08-03 |
| JP2002143990A (en) | 2002-05-21 |
| CA2347209C (en) | 2009-12-01 |
| CN1350896A (en) | 2002-05-29 |
| KR20020033961A (en) | 2002-05-08 |
| EP1203832A2 (en) | 2002-05-08 |
| CA2347209A1 (en) | 2002-04-30 |
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