KR100652202B1 - A Cu/Al/ferro-alloy/Al/Cu clad steel sheet and a method for manufacturing the same - Google Patents
A Cu/Al/ferro-alloy/Al/Cu clad steel sheet and a method for manufacturing the same Download PDFInfo
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- KR100652202B1 KR100652202B1 KR1020050027604A KR20050027604A KR100652202B1 KR 100652202 B1 KR100652202 B1 KR 100652202B1 KR 1020050027604 A KR1020050027604 A KR 1020050027604A KR 20050027604 A KR20050027604 A KR 20050027604A KR 100652202 B1 KR100652202 B1 KR 100652202B1
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Abstract
본 발명은, 표면에 산화 방지층을 갖는 철합금 판재, 철합금 판재의 양 측면 상에 접합 되는 Al판재 및 Al판재의 외 측면 상에 접합 되며 표면에 산화 방지층을 갖는 Cu 판재를 포함하는 Cu/Al/철합금/Al/Cu 클래드 강판 및 그 제조방법을 제공한다.The present invention provides a Cu / Al comprising an iron alloy sheet having an antioxidant layer on its surface, an Al sheet bonded to both sides of the iron alloy sheet, and a Cu sheet bonded to the outer side of the Al sheet and having an antioxidant layer on the surface. An iron alloy / Al / Cu clad steel sheet and a manufacturing method thereof are provided.
Cu, 알루미늄, 철합금, 도금, 클래드, 버스바 Cu, aluminum, iron alloy, plating, cladding, busbar
Description
도 1은 본 발명에 따른 Cu/Al/철합금/Al/Cu 클래드 강판의 적층구조를 나타내는 개략단면도이다.1 is a schematic sectional view showing a laminated structure of a Cu / Al / iron alloy / Al / Cu clad steel sheet according to the present invention.
도 2는 Cu-Al-steel 클래드의 미세조직을 보여주는 사진이다.Figure 2 is a photograph showing the microstructure of the Cu-Al-steel cladding.
본 발명은 버스 바 등 전기 또는 전자재료로 사용가능한 Cu/Al/철합금/Al/Cu 클래드 강판 및 그 제조방법에 관한 것이다.The present invention relates to a Cu / Al / iron alloy / Al / Cu clad steel sheet which can be used as an electric or electronic material such as a bus bar, and a manufacturing method thereof.
버스 바(Bus Bar)는 전원 케이블(cable)대신에 사용되는 구리로 된 평판을 총칭한다. 케이블보다 표면적이 크므로 방열효과가 우수하고 표면에 흐르는 고주파 전류의 임피던스를 낮추어 줌으로서 전류가 큰 고속 시스템에 더 유리하여 용도가 넓어지고 있다.Bus Bar is a generic term for copper plates used instead of power cables. Since the surface area is larger than the cable, the heat dissipation effect is excellent and the impedance of the high frequency current flowing on the surface is lowered, which is more advantageous for the high-speed system with a large current, and thus the use is widened.
최근에는 금속의 접합기술이 향상되면서 이러한 버스 바 전체를 동으로 하지 않고 클래드(clad)를 이용하여 원가절감, 성능 향상을 꾀는 경우가 많다. 예를 들 어 동이 비싸고 무겁다는 단점을 보완하기 위해서, 전체가 동이 아닌 동/Al/동 클래드 재가 많이 쓰이고 있다. 또한 버스바가 충격 등의 큰 변형을 받는 경우도 있기 때문에 강도가 높은 동/철합금/동 클래드가 요구되기도 한다. In recent years, as the bonding technology of metals is improved, a cost reduction and a performance improvement are often performed by using clads instead of the entire bus bar. For example, in order to make up for the disadvantage that copper is expensive and heavy, copper / Al / copper cladding materials are used a lot rather than copper. In addition, since the busbar may be subjected to large deformation such as impact, high strength copper / iron alloy / copper clad may be required.
클래드 접합이란 일반적으로 원자의 확산이 유리한 고온에서 압연 등으로 압력을 가하여 접합한다. 그러나 동이나 일반 철은 100-200도에서도 쉽게 산화되어 일반적인 방법으로는 클래드 접합이 어렵다. Clad joining generally refers to joining by applying pressure by rolling or the like at a high temperature where atom diffusion is advantageous. However, copper and ordinary iron are easily oxidized even at 100-200 degrees, making cladding difficult.
동/철합금/동 클래드 제조시 재료의 산화를 피하기 위하여 두 가지 방법이 쓰이고 있다. 하나는 상온에서 70-80% 이상의 압하율로 압연하여 접합하는 방법이다. 이 방법은 압연기의 용량이 커서 설비비가 많이 드는 문제가 있다. 또 다른 방법으로는 동/철합금/동을 적층한 다음 테두리를 용접하여 공기가 들어가지 않도록 한 다음 600도 이상에서 압연하여 접합시키는 방법이다. 이 방법은 용접에 비용이 많이 들고 (브레이징을 해야 하는데 진공에서 해야 할 경우가 많다.) 가열하면 동의 열팽창이 철합금의 그것보다 커서(동:16*10-6/도, 철: 11*10-6/도) 동이 부풀어 올라 압연시 겹침 등이 일어나는 문제가 있다.Two methods are used to avoid oxidation of materials in the production of copper / iron alloy / copper cladding. One is a method of joining by rolling at a reduction ratio of 70-80% or more at room temperature. This method has a problem that the capacity of the rolling mill is large and equipment costs are high. Another method is to laminate copper / iron alloy / copper, and then weld the rim to prevent air from entering, and then roll by joining at more than 600 degrees. This method is expensive to weld (brazing, often in vacuum), and when heated, the thermal expansion of copper is greater than that of iron alloy (e.g. 16 * 10 -6 / degree, iron: 11 * 10). -6 / degree) There is a problem that the copper swells and overlaps when rolling.
따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로,Therefore, the present invention has been made to solve the above problems,
본 발명의 목적은 Cu 및 철합금을 열간 압연하기전 경제성이 있는 금속으로 미리 도금하여 산화를 방지하고, Al판재를 중간재로 삽입하여 접합성을 향상시킨 동/Al/철합금/Al/동 클래드 강판 및 그 제조방법을 제공하는 것이다. An object of the present invention is copper / Al / iron alloy / Al / copper clad steel sheet to improve the bonding properties by pre-plating Cu and iron alloy with a metal that is economical before hot rolling to prevent oxidation, and inserting the Al plate into the intermediate material And to provide a method for producing the same.
본 발명에 따른 동/Al/철합금/Al/동 클래드 강판은,Copper / Al / iron alloy / Al / copper clad steel sheet according to the present invention,
표면에 산화 방지층을 갖는 철합금 판재; Iron alloy plate material which has an antioxidant layer on the surface;
철합금 판재의 양 측면 상에 접합 되는 Al판재;및Al sheet joined on both sides of the iron alloy sheet; And
Al판재의 외 측면 상에 접합 되며 표면에 산화 방지층을 갖는 Cu 판재를 포함한다.It includes a Cu plate bonded to the outer side of the Al plate and having an antioxidant layer on the surface.
바람직하게는, 철합금 판재의 산화 방지층은 Al 또는 Al합금의 용융도금층이고, Cu 판재의 산화 방지층은 Ag 또는 Ni의 무전해 도금층이다.Preferably, the anti-oxidation layer of the iron alloy sheet is a molten plating layer of Al or Al alloy, and the anti-oxidation layer of the Cu sheet is an electroless plating layer of Ag or Ni.
바람직하게는, 철합금 판재는 탄소강을 이용하고, Cu 판재는 전기동을 이용한다.Preferably, the iron alloy plate is made of carbon steel, and the Cu plate is made of copper.
바람직하게는, Al판재는 두께가 0.4 내지 2.0mm인 Al판재를 이용한다.Preferably, Al plate | board material uses Al plate material whose thickness is 0.4-2.0 mm.
본 발명에 따른 Cu/Al/철합금/Al/Cu 클래드 강판 제조방법은,Cu / Al / iron alloy / Al / Cu clad steel sheet manufacturing method according to the present invention,
철합금 판재의 표면상에 산화 방지층을 형성하는 단계; Forming an antioxidant layer on the surface of the iron alloy sheet;
Cu 판재의 표면상에 산화 방지층을 형성하는 단계;Forming an antioxidant layer on the surface of the Cu sheet;
철합금 판재의 양 측면 상에 Al 판재를 중간재로 하여 Cu 판재를 적층하여 적층물을 형성하는 단계;및Stacking a Cu sheet by using an Al sheet as an intermediate on both sides of the ferroalloy sheet to form a laminate; and
적층물을 열간 압연하여 접합하는 단계를 포함한다.Hot-rolling the laminate to bond.
바람직하게는, 철합금 판재의 표면상에 형성되는 산화 방지층은 Al 또는 Al 합금을 용융 도금하여 형성되고, Cu 판재의 표면상에 형성되는 산화 방지층은 Ag 또는 Ni를 무전해 도금하여 형성된다. Preferably, the anti-oxidation layer formed on the surface of the iron alloy plate is formed by hot-plating Al or Al alloy, and the anti-oxidation layer formed on the surface of the Cu plate is formed by electroless plating of Ag or Ni.
바람직하게는, 철합금 판재는 탄소강을 이용하고, Cu 판재는 전기동을 이용한다. Preferably, the iron alloy plate is made of carbon steel, and the Cu plate is made of copper.
바람직하게는, Al판재는 두께가 0.4 내지 2.0mm인 Al판재를 이용한다.Preferably, Al plate | board material uses Al plate material whose thickness is 0.4-2.0 mm.
바람직하게는, 적층물을 200 내지 450℃의 온도에서 열간 압연한다.Preferably, the laminate is hot rolled at a temperature of 200 to 450 ° C.
철합금에는 Al 또는 Al합금을 용융도금하면 접합은 물론 경제성도 우수하다. Cu 에는 Al의 경우 쉽게 금속간 화합물이 생성되어 적용이 어렵고, Ag나 Ni을 전해 또는 무전해 도금하면 내산화성이 우수할 뿐만 아니라, Cu와 금속간화합물을 생성하지 않아 가장 적합하다.In the iron alloy, Al or Al alloy is hot-plated to provide excellent bonding and economical efficiency. In the case of Al, the intermetallic compound is easily produced, and it is difficult to apply. When electrolytic or electroless plating of Ag or Ni is not only excellent in oxidation resistance, it is most suitable because it does not generate Cu and intermetallic compound.
(실시예)(Example)
두께 1.2mm의 순동 (전기동)에 2미크론의 Ni을 무전해 도금한 판재, 두께 1.2mm의 탄소강에 50미크론의 Al-8Si 합금이 용융도금된 판재 (포항강판에서 알코스타라는 제품명으로 생산됨) 를 준비하였다. 전기동/탄소강/전기동으로 적층한 다음 400도에서 67%의 압하율로 압연하여 접합하였다. 그 결과 접합력이 30N/5mm로 낮았다. 클래드의 접합력에 대한 규격은 없지만 버스바가 절곡해서 사용하므로 대개 120N/5mm 정도의 접합력이 있어야 절곡시 박리가 생기지 않는다. 2mm thick copper electrolessly plated with 1.2mm of pure copper (electrolytic copper), 50mm of Al-8Si alloy plated with 1.2mm thick carbon steel Was prepared. It was laminated with copper / carbon steel / electrophoresis and then rolled at 400 degrees with a rolling reduction of 67%. As a result, the bonding force was as low as 30N / 5mm. Although there is no specification for cladding, the bus bar is used by bending, so it is usually necessary to have a bonding force of about 120N / 5mm to prevent peeling during bending.
철합금의 용융도금층과 Ni도금층의 접합력을 상승시키기 위해 이 사이에 Al을 삽입 하는 방법을 시도하였다. 상기의 두께 1.2mm의 순동 (전기동)에 2미크론의 Ni을 무전해 도금한 판재, 두께 1.2mm의 탄소강에 50미크론의 Al-8Si 합금이 용융도금된 판재사이에 두께 1.2mm의 Al (AA1050)를 삽입하였다. 그리하여 전기동/Al/탄소강/Al/전기동으로 적층한 다음 400도에서 67%의 압하율로 압연하여 접합하였다. 접합력을 측정한 결과 동의 강도보다 높아 측정이 불가하였다. (800N/5mm이상)In order to increase the bonding strength between the molten plating layer and the Ni plating layer of the iron alloy, a method of inserting Al therebetween was attempted. 1.2 mm thick Al (AA1050) Was inserted. Thus, laminations were made of copper / Al / carbon steel / Al / electrophoresis, followed by rolling at 400 degrees with a rolling reduction of 67%. As a result of measuring the bonding force, it could not be measured because it was higher than the strength of copper. (800N / 5mm or more)
그림1은 Cu-Al-steel 클래드의 미세조직을 보여주는 사진이다.Figure 1 shows the microstructure of Cu-Al-steel cladding.
본 발명에 의하면, 동과 철합금의 산화를 막을 수 있고, 접합성이 뛰어나며 경제성을 겸비한 동/Al/철합금/Al/동 클래드 강판 및 그 제조방법을 얻을 수 있다.According to the present invention, a copper / Al / iron alloy / Al / copper clad steel sheet capable of preventing oxidation of copper and iron alloy, and having excellent bonding properties and economical efficiency can be obtained.
본 발명은 버스바를 예를들어 설명하고 있지만 버스바 이외에도 동일한 물성을 요구하는 데에는 어디든지 적용할 수 있음은 물론이다.Although the present invention has been described using the bus bar as an example, it is a matter of course that the present invention can be applied wherever the same physical properties are required in addition to the bus bar.
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| KR101017934B1 (en) | 2009-05-18 | 2011-03-04 | (주)티에이치엔 | Bus plate for junction box and method of manufacturing the same |
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| KR101017934B1 (en) | 2009-05-18 | 2011-03-04 | (주)티에이치엔 | Bus plate for junction box and method of manufacturing the same |
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