KR100909502B1 - Ceramic welding support for transverse welding - Google Patents
Ceramic welding support for transverse welding Download PDFInfo
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- KR100909502B1 KR100909502B1 KR1020070109493A KR20070109493A KR100909502B1 KR 100909502 B1 KR100909502 B1 KR 100909502B1 KR 1020070109493 A KR1020070109493 A KR 1020070109493A KR 20070109493 A KR20070109493 A KR 20070109493A KR 100909502 B1 KR100909502 B1 KR 100909502B1
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Abstract
본 발명은 횡향 용접시 중력에 의한 용융물의 처짐에 의한 비드의 쏠림현상 등의 용접불량을 방지하기 위하여, 중량%로, 58%≤ SiO2≤ 65%, 28%≤ Al2O3 ≤ 34%, 2% ≤ MgO ≤ 5%, 0.5% ≤ CaO ≤ 2%, K2O 및 Na2O의 알칼리 산화물의 총 함량 0.8%~2%, 그리고 잔부는 Fe2O3를 포함하는 불가피 불순물로 구성되는 횡향 용접용 세라믹지지구를 제공함으로써 그라인딩 등의 후가공의 공정을 생략할 수 있고 또한 슬래그 박리성이 매우 우수하여 생산성 향상을 도모할 수 있다.In the present invention, in order to prevent welding defects such as tipping of beads due to deflection of the melt due to gravity during lateral welding, 58% ≦ SiO 2 ≦ 65%, 28% ≦ Al 2 O 3 ≦ 34% , 2% ≤ MgO ≤ 5%, 0.5% ≤ CaO ≤ 2%, the total content of alkali oxides of K 2 O and Na 2 O 0.8% ~ 2%, and the balance is composed of inevitable impurities including Fe 2 O 3 By providing a ceramic support for lateral welding, post-processing such as grinding can be omitted, and the slag peelability is very excellent, and productivity can be improved.
횡향용접, 용융물의 처짐, 용접불량, 용접지지구 Transverse welding, sag of melt, poor welding, welding support
Description
본 발명은 횡향 용접용 세라믹 용접지지구에 관한 것으로, 구체적으로는 생성되는 용융물의 점도를 조절하여 횡향 용접시 중력에 의한 용융물의 처짐에 의한 비드의 쏠림현상 등의 용접불량을 방지함으로써 그라인딩 등의 후가공의 공정을 생략할 수 있고 또한 슬래그 박리성이 매우 우수하여 생산성 향상을 도모할 수 있는 횡향 용접용 세라믹 용접지지구에 관한 것이다.The present invention relates to a ceramic welding support for lateral welding, and specifically, by adjusting the viscosity of the resulting melt to prevent welding defects such as tipping of the beads due to deflection of the melt due to gravity during lateral welding, such as grinding. The present invention relates to a ceramic welding support for lateral welding in which post-processing can be omitted and slag peelability is very excellent and productivity can be improved.
일반적으로 선박건조에는 많은 용접이 요구되는데, 지금까지 가장 보편적으로 이용되는 방법은 아래보기 용접을 실시한 후 용접된 강판을 이동시켜 장착하는작업을 진행하여 왔으나, 조선소에서 사용되는 강판은 기물이 크고 무겁기 때문에 이동작업에 어려움이 있고 또한 고비용이 발생되어 원가상승의 요인이 되어 왔다. 이에 최근에는 횡향 용접을 실시하는 경우가 지속적으로 증가하고 있다. In general, a lot of welding is required for ship construction. Until now, the most commonly used method has been to move and install the welded steel plate after performing the bottom view welding, but the steel plate used in shipyards is large and heavy. Therefore, it is difficult to move and high cost has been a factor of the cost increase. Recently, the number of lateral weldings has been increasing continuously.
횡향 용접이란 수직 방향으로 나란히 놓여지는 상,하부 강판모재를 상호 맞댄 상태에서 용접부 이면에 용접지지구를 부착한 후 횡방향으로 용접 작업을 행하는 용접방법을 의미한다.Lateral welding means a welding method in which the welding support is attached to the back side of the welded portion in a state in which the upper and lower steel substrates placed side by side in the vertical direction are put together, and the welding operation is performed in the lateral direction.
이러한 횡향 용접법으로 용접을 하는 경우 그 특성상 중력의 방향으로 용접부위의 용융물이 처지는 현상이 발생하는 문제가 있다. 따라서, 종래에는 이러한 용융물의 처짐 현상을 방지하기 위하여 세라믹 용접지지구의 구조나 형상을 변경하여 가능한 한 중력에 의한 영향을 적게 하려는 시도가 있었다. 그러나 사용되는 세라믹 용접지지구의 재질은 종래의 일반적인 아래보기 용접에 사용되어 오던 세라믹 용접지지구를 그대로 사용하게 됨으로써 중력에 의한 용융물의 처짐 현상이 완전히 제거되지 않아 비드상부에는 언더컷이, 비드하부에는 오버랩이 여전히 발생하게 되고 이것이 용접불량으로 이어져 용접 후 그라인딩 등의 후가공이 필요할 뿐 아니라, 용접품질의 저하로 선주 및 선급사의 불만사항이 되어 왔다.In the case of welding by the lateral welding method, there is a problem in that the melt of the welding portion sags in the direction of gravity due to its characteristics. Therefore, in the past, attempts have been made to change the structure or shape of the ceramic welding support to reduce the influence of gravity as much as possible in order to prevent sagging of the melt. However, the material of the ceramic welding support used is that the ceramic welding support, which has been used for conventional bottom welding, is used as it is, and the deflection phenomenon of the melt due to gravity is not completely eliminated, so the undercut is over the bead and the overlap is under the bead. This still occurs and this leads to poor welding, which requires post processing such as grinding after welding, as well as complaints of ship owners and class members due to deterioration of welding quality.
따라서, 본 발명은 이와 같은 종래의 문제점을 감안하여 안출된 것으로, 그 목적은 생성되는 용융물의 점도를 조절하여 횡향 용접시 중력에 의한 용융물의 처짐에 의한 비드의 쏠림현상 등의 용접불량을 방지함으로써 그라인딩 등의 후가공의 공정을 생략할 수 있고 또한 슬래그 박리성이 매우 우수하여 생산성 향상을 도모할 수 있는 횡향 용접용 세마릭 용접지지구를 제공하고자 하는 것이다.Accordingly, the present invention has been made in view of such a conventional problem, and its object is to adjust the viscosity of the resulting melt to prevent welding defects, such as tipping of beads due to deflection of the melt by gravity during transverse welding. It is an object of the present invention to provide a semi-rigid welding support for lateral welding which can omit a post-processing step such as grinding and further improve slag productivity.
상기한 목적을 달성하기 위하여 본 발명은, 세라믹 분말을 성형, 소결한 세라믹 용접지지구로서, 상기 세라믹 용접지지구는, 중량%로, 58%≤ SiO2≤ 65%, 28% ≤ Al2O3 ≤ 34%, 2% ≤ MgO ≤ 5%, 0.5% ≤ CaO ≤ 2%, K2O 및 Na2O의 알칼리 산화물의 총 함량 0.8%~2%, 그리고 잔부는 Fe2O3를 포함하는 불가피 불순물로 구성되는 것을 특징으로 하는 횡향 용접용 세라믹지지구를 제공한다.In order to achieve the above object, the present invention is a ceramic welding support which is molded and sintered ceramic powder, the ceramic welding support, by weight%, 58% ≤ SiO 2 ≤ 65%, 28% ≤ Al 2 O 3 ≤ 34%, 2% ≤ MgO ≤ 5%, 0.5% ≤ CaO ≤ 2%, the total content of alkali oxides of K 2 O and Na 2 O 0.8% -2%, and the balance is unavoidable containing Fe 2 O 3 Provided is a ceramic support for lateral welding, characterized by consisting of impurities.
이하, 본 발명을 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail.
용접시 용접부위에 형성되는 용융물의 슬래그 점도는 일반적으로 쓰이는 아래보기 용접에서도 이면비드 형상 및 용접진행성 등의 용접특성이나 작업과 밀접하게 연관이 있어 적당한 점도를 갖는 것이 아주 중요하다. 슬래그의 점도가 높으면 슬래그의 흐름성이 저하되어 용융금속의 흐름도 저하되는 현상을 발생하기도 하지만 본 발명의 목적에 따른 적당한 점도를 가져야 용융금속의 처짐현상 및 상부의 언더컷의 발생을 억제할 수 있다. The slag viscosity of the melt formed on the welded part during welding is very important to have proper viscosity in the bottom view welding, which is commonly used, because it is closely related to the welding properties such as the back bead shape and the welding progression. If the slag viscosity is high, the flowability of the slag may be lowered and the flow rate of the molten metal may be lowered. However, the slag may have satisfactory viscosity in accordance with the object of the present invention to prevent sagging of the molten metal and the occurrence of undercuts.
따라서 산성 산화물인 산화규소(SiO2)는 용융물의 점도를 높이기 때문에 슬래그 용융물과 용융금속의 중력에 의한 처짐 현상을 방지할 수 있는 이점이 있다. 다른 주요성분인 Al2O3, MgO 및 CaO는 염기성 산화물로 용융물의 점도를 감소시키는 역할을 한다.Therefore, silicon oxide (SiO 2), which is an acidic oxide, has an advantage of preventing sagging due to gravity of the slag melt and the molten metal because it increases the viscosity of the melt. The other major components Al2O3, MgO and CaO are basic oxides that serve to reduce the viscosity of the melt.
그러므로 산화규소의 함량을 58% 이상으로 함유시켜 용융물의 점도를 증가시켜 용융물의 처짐 현상을 방지하고자 하였다. 또한 산화규소는 열에 의한 팽창 및 수축이 적어 슬래그를 잡아주는 역할을 하여 슬래그 박리성 향상에도 중요한 역할을 한다. Therefore, the silicon oxide content of 58% or more was added to increase the viscosity of the melt to prevent sagging of the melt. In addition, silicon oxide plays an important role in improving slag peelability by serving to hold slag due to less expansion and contraction caused by heat.
이러한 산화규소의 함량을 65%이하로 한정하는 이유는, 용접작업시 슬래그 용융물이 경화되기 전에 용해된 가스들이 이면비드 쪽으로 방출이 되어야 하는데, 65% 초과시 점도가 필요 이상으로 높아져서 가스의 방출이 용이하지 못하여 이면비드에 블로우홀 등의 기공이 발생하여 오히려 용접결함이 나타날 가능성이 있기 때문이다. 또한 용융된 금속은 경화 전에 상, 하로 퍼져서 이면비드를 생성하여야 하는데 점도가 지나치게 높으면 용융금속이 충분히 퍼지지 못하여, 경화 전에 상부의 모재부분을 덮지 못하여서 언더컷을 발생하는 원인이 된다. The reason for limiting the content of silicon oxide to 65% or less is that, during welding, dissolved gases must be released toward the backside beads before the slag melt is cured, and when it exceeds 65%, the viscosity becomes higher than necessary so that the gas is easily released. This is because pores, such as blow holes, may occur in the backside beads, resulting in weld defects. In addition, the molten metal is to be spread up and down before the curing to produce the back bead, if the viscosity is too high molten metal does not spread sufficiently, it is not possible to cover the upper base material portion before curing causes the undercut.
산화알루미늄(Al2O3)은 그 함량이 많아지면 세라믹 용접지지구의 내화도 및 기계적 강도를 증가시키는 역할을 하는 성분으로서 함량이 28% 미만이면 내화도가 감소하여 용락 및 올록비드의 형성이 우려되며, 또한 기계적 강도가 감소하여 물리적인 충격에 의해 파손의 우려가 있다. 한편 34%를 초과하여 첨가하게 되면 용융물의 점도가 감소하여 이면비드 처짐 현상이 발생하게 된다. Aluminum oxide (Al 2 O 3 ) is a component that increases the fire resistance and mechanical strength of the ceramic welding support as the content is increased, if the content is less than 28%, the fire resistance is reduced and the formation of molten and ollock beads is concerned. In addition, the mechanical strength is reduced, there is a risk of damage due to physical impact. On the other hand, when the content exceeds 34%, the viscosity of the melt decreases, causing back bead sagging.
산화마그네슘(MgO)은 세라믹 용접지지구에 많이 사용되는 성분으로서 열충격에 아주 강한 코디어라이트를 생성하는 주성분이고, 용접결함에 중요한 원인이 되는 S과 P을 제거하는 역할을 한다. 산화마그네슘을 2% 미만으로 첨가하게 되면 코디어라이트의 생성이 충분하지 않아 용접시에 세라믹 용접지지구의 파손이 발생하게 되어 용락 등의 용접불량이 발생할 수 있으며, 또한 S과 P이 충분히 제거되지 않아 종균열의 원인이 되기도 한다. 반면, 5%를 초과하여 첨가하게 되면 산화알루미늄과 마찬가지로 점도 감소의 원인이 되어 이면비드 처짐 및 하부 이면비드에 오버랩이 발생하는 원인이 된다. Magnesium oxide (MgO) is a component commonly used in ceramic welding supports, and is a main component that produces cordierite that is very resistant to thermal shock, and removes S and P, which are important causes of weld defects. If magnesium oxide is added less than 2%, cordierite is not produced enough, causing breakage of ceramic welding support during welding, which may lead to welding defects such as meltdown, and S and P are not sufficiently removed. It can also cause species cracking. On the other hand, the addition of more than 5% causes a decrease in viscosity as in the case of aluminum oxide, causing the back bead to sag and the overlap to the bottom back bead.
산화칼슘(CaO)은 저융점 화합물을 생성하는 융제 역할을 하며, 산화칼슘이 황과 반응을 하여 CaS 형태로 화합물을 형성하여 모재 및 용융금속 내에 황의 존재를 억제하는 역할을 한다. 그러나, 산화칼슘의 양이 2%를 초과하는 경우 융점을 지나치게 낮추어 제품이 유리화하어 수축률이 과대해지고 제품의 형상이 양호하지 못하게 되는 원인이 된다. Calcium oxide (CaO) acts as a flux to produce a low melting point compound, and calcium oxide reacts with sulfur to form a compound in the form of CaS to inhibit the presence of sulfur in the base metal and molten metal. However, if the amount of calcium oxide exceeds 2%, the melting point is too low to vitrify the product, causing excessive shrinkage and poor shape of the product.
그리고 K2O, Na2O와 같은 알칼리 산화물의 용도는 소결조제로서 용접용 세라믹 제조 시에 소성온도 범위를 넓혀주는 역할을 하며, 용접시에 기화되어 용접부위를 대기로부터 보호하는 역할도 아울러 한다. 이러한 알칼리 산화물의 함유량이 2%를 초과하면 산화칼슘과 동일하게 소성제품을 유리화시켜 용접 시 발생하는 고입열에 대한 열충격 저항성을 저하시킨다.In addition, the use of alkali oxides such as K 2 O and Na 2 O serves as a sintering aid to widen the firing temperature range during the manufacture of welding ceramics, and also serves to protect the welding area from the atmosphere by vaporizing during welding. When the content of the alkali oxide exceeds 2%, the fired product is vitrified in the same way as calcium oxide, thereby lowering the thermal shock resistance against high heat input generated during welding.
이상과 같이 본 발명에 의하면 용접시 생성되는 용융물의 점도를 조절하여 횡향 용접시 중력에 의한 용융물의 처짐에 의한 비드의 쏠림현상 등의 용접불량을 방지함으로써 그라인딩 등의 후가공의 공정을 생략할 수 있고, 또한 슬래그 박리성이 매우 우수하여 생산성 향상을 도모할 수 있는 횡향 용접용 세마릭 용접지지구를 제공하는 것이 가능하다.As described above, according to the present invention, a post-processing process such as grinding can be omitted by adjusting the viscosity of the melt generated during welding to prevent welding defects such as beading of beads caused by deflection of the melt due to gravity during lateral welding. In addition, it is possible to provide a sematic welding support for lateral welding which is excellent in slag peelability and can improve productivity.
우선, 본 발명의 각 실시예와 비교예의 세라믹지지구들은 공통적으로 다음과 같은 제조공정을 거친다.First, the ceramic supports of each example and the comparative example of the present invention are commonly subjected to the following manufacturing process.
먼저, 본 발명의 세라믹 용접지지구의 구성성분을 포함하는 원료들(카올린, 탈크, 알루미나, 규사등)과 첨가물을 정해진 양으로 칭량한 후 팬밀에 투입하여 약 3시간 동안 혼합한다. 본 발명에서 사용한 세라믹 용접지지구의 화학조성을 표 1에 나타내었다.First, raw materials (kaolin, talc, alumina, silica sand, etc.) and additives containing the components of the ceramic welding support of the present invention are weighed in a predetermined amount, and then put into a pan mill and mixed for about 3 hours. Table 1 shows the chemical composition of the ceramic welding support used in the present invention.
그런 다음, 상기 혼합물 분말에 폴리비닐알코올, 스테아린산, 파라핀 왁스 및 기타 첨가물을 유기바인더로서 혼합하여 과립을 제조한 후, 상기 혼합물을 건조기에서 90~120℃로 8~16시간 건조한다.Then, polyvinyl alcohol, stearic acid, paraffin wax and other additives are mixed in the mixture powder as an organic binder to prepare granules, and then the mixture is dried in a drier at 90-120 ° C. for 8-16 hours.
이어서 금형과 프레스에서 30톤 기계압력으로 개당 성형압력 10~30kgf/㎠로 성형과정을 거치게 되며, 그 후 고온로에서 1250 ~ 1350℃, 5~12시간의 조건으로 소성 후 노냉시켜 세라믹 용접지지구를 제조하고 알루미늄 테이프를 이용하여 포장한다. Subsequently, the molding process is performed at a mold pressure of 10 to 30 kgf / cm2 at 30 tons mechanical pressure in molds and presses, and then after firing at 1250 to 1350 ° C for 5 to 12 hours in a high temperature furnace, Is prepared and packed using aluminum tape.
여기서, 상기와 같은 제조공정은 일반적인 세라믹 용접지지구의 제조공정으로 대치할 수 있으며, 본 발명의 세라믹 용접지지구를 제조하는 공정에 대한 상세한 설명은 생략하기로 한다.Here, the manufacturing process as described above can be replaced by the manufacturing process of the general ceramic welding support, the detailed description of the process of manufacturing the ceramic welding support of the present invention will be omitted.
이하, 본 발명을 각 실시예를 참조로 하여 설명한다. 그러나, 이들 실시예는 본 발명을 예시하기 위한 것일 뿐, 본 발명이 이에 제한되는 것은 아니다.Hereinafter, the present invention will be described with reference to each embodiment. However, these examples are only for illustrating the present invention, but the present invention is not limited thereto.
이렇게 얻어진 용접지지구는 아래의 조건으로 용접시험을 행하고 품질측정을 하였으며, 그 결과를 표 2에 나타냈다.The welding support thus obtained was subjected to welding test and quality measurement under the following conditions, and the results are shown in Table 2.
1) 용접와이어 : SF-71, 1.4￠1) Welding Wire: SF-71, 1.4 ￠
2) 용접전압 : 26V2) Welding voltage: 26V
3) 용접전류 : 220A3) Welding Current: 220A
4) 용접갭 : 6mm4) Welding gap: 6mm
5) 모재두께 : 12mm5) Base material thickness: 12mm
6) 용접방법 : 수동용접6) Welding Method: Manual Welding
상기 표 2의 시험결과를 보면 세라믹 모재의 구성 성분이 본 발명의 가장 바람직한 범위 내에 속하는 실시예 1~3에서는 이면비드 상부에 언더컷, 이면비드 하부에 오버랩 및 이면비드 처짐 현상이 발생하지 않고 있고, 슬래그 박리성이나 세라믹 파손 등의 용접불량 요인들이 발생하지 않고 있다.According to the test results of Table 2, in Examples 1 to 3, the constituents of the ceramic base material are within the most preferred range of the present invention, there is no undercut at the top of the back bead, overlap and sag of the back bead at the bottom of the back bead, Welding defect factors such as slag peelability and ceramic breakage do not occur.
그러나 비교예 1~7에서는 본 발명의 범위 밖의 화학조성에 의해 언더컷, 오버랩, 이면비드 불량 등의 중대한 용접결함들이 발생하는 것을 볼 수 있다. 이들 문제점을 세부적으로 살펴보면 다음과 같다. However, in Comparative Examples 1 to 7, it can be seen that significant weld defects such as undercut, overlap, backside bead defects, etc. occur due to chemical composition outside the scope of the present invention. In detail, these problems are as follows.
우선, 비교예 1은 산화규소의 함량이 극히 높고, 산화알루미늄의 함량이 미달이 되어서 슬래그 유동성이 작아지므로 슬래그 박리성 저하 및 상부 이면비드에 언더컷이 발생하고, 비드 처짐현상이 발생한다, 또한 기공률이 낮으므로 세라믹 파손이 일어났다.First, in Comparative Example 1, since the content of silicon oxide is extremely high and the content of aluminum oxide is less than the slag fluidity, the slag peelability is lowered, undercut occurs in the upper backside beads, and the bead sag occurs. Low ceramic breakage occurred.
또한 비교예 2는 비교예 1의 세라믹 모재에 슬래그 생성 및 용접진행성을 증가시키기 위한 보조제로 유리섬유를 적층한 샘플이나, 세라믹 모재의 영향으로 양호한 용접 결과를 얻을 수 없었다. In addition, Comparative Example 2 could not obtain a good welding result due to the sample of the glass fiber laminated as an auxiliary agent for increasing the slag generation and welding progressability in the ceramic base material of Comparative Example 1, or the influence of the ceramic base material.
비교예 3은 산화규소와 산화알루미늄의 함량이 본 발명의 규정범위에 근접하여, 상부 이면비드에 언더컷과 하부 이면비드의 오버랩은 발생하지 않았으나 산화규소의 함량이 적고 산화알루미늄의 함량이 높기 때문에 비드의 처짐현상이 발생하여서 용접불량이 발생하게 되었다.In Comparative Example 3, the content of silicon oxide and aluminum oxide was close to the prescribed range of the present invention, but the overlap between the undercut and the lower backside beads did not occur in the upper backside beads, but the content of silicon oxide was low and the content of aluminum oxide was high. Deflection phenomenon occurred and welding defect occurred.
비교예 4는 고입열 용접에 사용되는 제품으로 내화도가 높은 제품이다. 그러나 산화알루미늄의 함량이 높아서 슬래그의 생성이 용이하지 않고, 산화마그네슘의 양이 많아 이면비드 상부에 언더컷이 발생하고, 이면비드의 처짐현상이 생기는 용접불량이 발생하게 되었다.Comparative Example 4 is a product used for high heat input welding is a high fire resistance product. However, due to the high content of aluminum oxide, it is not easy to produce slag, and the amount of magnesium oxide is large, causing undercut to occur on the upper side of the back bead, resulting in a poor welding that causes the back bead to sag.
비교예 5는 내화도를 높이기 위해 산화알루미늄의 함량을 높인 제품이다. 그러나 산화알루미늄의 함량이 본 발명의 규정범위보다 상당히 높고 또한 알칼리 산화물의 함량이 0.8% 미만이어서 슬래그 생성이 용이하지 않아 비드 처짐현상이 발생하고, 또한 산화규소의 양이 감소하게 되어 내화도가 감소하는 현상이 발생하였다. 또한 산화마그네슘의 함량이 거의 없어 코디어라이트 생성이 되지 않아 용접 후에 세라믹 모재의 파손이 발생하여, 중대한 결함인 용락발생을 야기할 수 있는 문제점이 있다.Comparative Example 5 is a product in which the content of aluminum oxide is increased to increase the fire resistance. However, since the content of aluminum oxide is considerably higher than the scope of the present invention, and the content of alkali oxide is less than 0.8%, slag formation is not easy, so that bead sag occurs, and the amount of silicon oxide is reduced to decrease the fire resistance. The phenomenon occurred. In addition, since there is almost no content of magnesium oxide, cordierite is not generated, and thus, a breakage of the ceramic base material occurs after welding, which may cause melting, which is a serious defect.
비교예 6은 용접자세 중 하나인 입향상진법을 위하여 개발된 제품으로 입향상진법에서는 뛰어난 용접진행성과 용접품질이 우수하나, 횡향용접에서는 산화마그네슘의 함량이 본 발명의 규정보다 너무 높고, 산화규소의 양이 적어 슬래그의 점도가 낮아져서 용융금속이 상부에 이면 비드로 생성이 되기 전에 흘러 내려 상부에 언더컷이 발생하였다.Comparative Example 6 is a product developed for the enhancement method, one of the welding postures, but excellent welding progression and welding quality in the enhancement process, but in the lateral welding, the content of magnesium oxide is too high than the provisions of the present invention, silicon oxide Because of the low amount of the slag, the viscosity of the slag was lowered. If the molten metal was on the upper side, the molten metal flowed down before being formed into beads, causing undercut on the upper side.
비교예 7은 가장 보편적으로 사용되는 아래보기용 용접지지구로서 본 발명의 규정보다 산화규소의 함량이 적고, 산화알루미늄과 산화마그네슘의 함량이 지나치게 높아서 이면비드의 처짐현상과, 언더컷, 오버랩 등의 용접불량의 결과가 발생하였다. Comparative Example 7 is the most commonly used welding support for the below view, and the content of silicon oxide is less than that of the present invention, and the content of aluminum oxide and magnesium oxide is too high, so that the back bead sagging phenomenon, undercut, overlap, etc. The result of welding failure occurred.
이에 반하여 실시예 1~3은 본 발명규정에 적합한 제품으로 비드처짐, 언더컷, 오버랩 등의 용접불량이 발생하지 않았고, 용접진행성 측면에서도 양호한 결과를 얻을 수 있는 것을 알 수 있다. On the contrary, Examples 1 to 3 are suitable products according to the present invention, and it is understood that welding defects such as bead deflection, undercut, and overlap did not occur, and good results can be obtained in terms of welding progressability.
이상과 같이, 본 발명은 비록 한정된 실시예에 의해 설명되었으나, 본 발명은 이것에 의해 제한되지 않으며 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 특허청구범위의 균등범위 내에서 다양한 수정과 변형이 가능하다.As mentioned above, although this invention was demonstrated by the limited Example, this invention is not limited by this and it is described by the person of ordinary skill in the art to this invention, and the following description. Various modifications and variations are possible within the scope of the claims.
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| KR (1) | KR100909502B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102187763B1 (en) | 2019-07-24 | 2020-12-07 | 정무수 | Ceramic backing material for horizontal welding |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950014003B1 (en) * | 1992-10-02 | 1995-11-20 | 신기전열주식회사 | Composition of ceramic plate |
| JP2001205606A (en) | 2000-01-24 | 2001-07-31 | Nuclear Fuel Ind Ltd | Apparatus for taking out ceramics molded body in gypsum mold |
| KR20050005860A (en) * | 2003-07-07 | 2005-01-15 | 박광수 | Ceramic Welding Supporter and Manufacturing Method Thereof |
| KR20060130975A (en) * | 2005-06-14 | 2006-12-20 | 신상기 | Compositins for heating plate of permanant iron and preparation method of heating plate using these compositions |
-
2007
- 2007-10-30 KR KR1020070109493A patent/KR100909502B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950014003B1 (en) * | 1992-10-02 | 1995-11-20 | 신기전열주식회사 | Composition of ceramic plate |
| JP2001205606A (en) | 2000-01-24 | 2001-07-31 | Nuclear Fuel Ind Ltd | Apparatus for taking out ceramics molded body in gypsum mold |
| KR20050005860A (en) * | 2003-07-07 | 2005-01-15 | 박광수 | Ceramic Welding Supporter and Manufacturing Method Thereof |
| KR20060130975A (en) * | 2005-06-14 | 2006-12-20 | 신상기 | Compositins for heating plate of permanant iron and preparation method of heating plate using these compositions |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102187763B1 (en) | 2019-07-24 | 2020-12-07 | 정무수 | Ceramic backing material for horizontal welding |
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| KR20090043760A (en) | 2009-05-07 |
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