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KR20030061058A - Flux cored wire for welding austenitic stainless steel - Google Patents

Flux cored wire for welding austenitic stainless steel Download PDF

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KR20030061058A
KR20030061058A KR1020020001412A KR20020001412A KR20030061058A KR 20030061058 A KR20030061058 A KR 20030061058A KR 1020020001412 A KR1020020001412 A KR 1020020001412A KR 20020001412 A KR20020001412 A KR 20020001412A KR 20030061058 A KR20030061058 A KR 20030061058A
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welding
stainless steel
flux
wire
zro
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KR100569252B1 (en
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유광재
김성국
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현대종합금속 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B23K35/0266—Rods, electrodes, wires flux-cored
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

오스테나이트계 스테인레스강 용접용 플럭스 충전와이어가 제공된다.A flux fill wire for austenitic stainless steel welding is provided.

본 발명은, 스테인레스강제 외피에 플럭스가 충전된 플럭스 충전와이어에 있어서, 중량%로, TiO2:3.0∼7.0%, SiO2: 0.5∼3.0%, ZrO2: 0.1∼ 1.5%, Al2O3: 0.1∼1.0%, Al분말: 0.3∼1.2%, 금속 불화물: 0.05∼0.5%, Bi2O3: 0.02∼0.15%, K2O+Na2O: 0.05∼0.5%, Si: 0.2~1.2%, Mn: 0.5~3.0%, 잔여 금속성분 및 불가피한 불순물로 이루어지며, Al분말/(TiO2+SiO2+ZrO2)의 값이 0.05∼0.18을 만족하는 오스테나이트계 스테인레스강 용접용 플럭스 충전와이어에 관한 것이다.The present invention, in the stainless steel the flux is a flux filled in the sheath forced charging wire, in weight%, TiO 2: 3.0~7.0%, SiO 2: 0.5~3.0%, ZrO 2: 0.1~ 1.5%, Al 2 O 3 : 0.1 to 1.0%, Al powder: 0.3 to 1.2%, metal fluoride: 0.05 to 0.5%, Bi 2 O 3 : 0.02 to 0.15%, K 2 O + Na 2 O: 0.05 to 0.5%, Si: 0.2 to 1.2 %, Mn: 0.5 ~ 3.0%, austenitic stainless steel welding flux filling with Al powder / (TiO 2 + SiO 2 + ZrO 2 ) of 0.05 ~ 0.18, consisting of residual metal components and unavoidable impurities It is about a wire.

본 발명의 와이어는, 탄산가스(CO2)나 Ar과 15∼25%CO2혼합가스 중 어느 보호가스로 용접하여도 양호한 전자세 용접성 및 아크 안정성, 낮은 수준의 스패터 발생량을 얻을 수 있다.The wire of the present invention can obtain good electric field weldability, arc stability, and a low level of spatter generation even when welding with carbon dioxide (CO 2 ) or Ar and any protective gas of 15 to 25% CO 2 mixed gas.

Description

오스테나이트계 스테인레스강 용접용 플럭스 충전 와이어{Flux cored wire for welding austenitic stainless steel}Flux cored wire for welding austenitic stainless steel}

본 발명은 스테인레스강 용접용 플럭스 충전와이어에 관한 것으로, 보다 상세하게는, 보호가스로서 탄산가스(CO2)나 Ar과 15∼25%CO2혼합가스 중 어느 것을 사용하더라도 양호한 전자세 용접성, 아크 안정성 및 낮은 수준의 스패터 발생량을 얻을 수 있는 오스테나이트계 스테인레스강 용접용 플럭스 충전와이어에 관한 것이다.The present invention relates to a flux-filled wire for welding stainless steel, and more specifically, good electric field weldability, arc even if any one of carbon dioxide (CO 2 ), Ar and 15 to 25% CO 2 mixed gas as a protective gas The present invention relates to a flux filled wire for austenitic stainless steel welding capable of achieving a stable and low level of spatter generation.

플럭스 충전와이어의 용접에는 통상 보호가스로서 탄산 가스 또는 이의 혼합 가스가 이용되고 있다. 그 중, 탄산가스를 사용하여 용접할 경우에는 혼합가스에 비하여 용접시 스패터 발생이 많은 반면, 용입이 용이하고 가격이 저렴하기 때문에 산업 현장에서 많이 사용되어지고 있다. 그러나 이러한 탄산가스 사용으로 스패터가 발생이 많아지면, 스패터가 부착된 스테인레스강의 표면에서 부식이 발생하게 되어 내부식성이 현저히 열화되고, 이에 따라, 용접작업후 그라인딩이나 산세등의방법으로 발생된 스패터를 제거해야 하는데, 이것은 상당한 비용과 노력이 요구된다.Carbon dioxide gas or a mixed gas thereof is usually used as a protective gas for welding flux-filled wires. Among them, in the case of welding using carbonic acid gas, spatter is more generated during welding than in the mixed gas, but it is widely used in industrial sites because of easy penetration and low price. However, if the spatter is generated by the use of carbon dioxide gas, corrosion occurs on the surface of the stainless steel to which the spatter is attached, and the corrosion resistance is remarkably deteriorated. Accordingly, after welding, grinding or pickling is generated. Spatter must be removed, which requires considerable cost and effort.

또한, 보호가스로서 혼합가스를 사용하여 용접하는 경우에는 스패터 발생량은 적지만, 혼합가스로 사용되는 Ar가스의 가격이 탄산 가스에 비하여 상대적으로 비싸고 용접시에 용입이 충분하지 않다는 단점이 있다. 따라서 용접부의 고품질이 요구되는 특수한 경우에만 보호가스로서 혼합가스를 사용하는 것이 일반적이었다.In addition, in the case of welding using a mixed gas as a protective gas, the amount of spatter generated is small, but the price of Ar gas used as the mixed gas is relatively higher than that of carbon dioxide gas and insufficient penetration during welding. Therefore, it was common to use a mixed gas as a protective gas only in special cases where high quality of welds is required.

한편 스테인레스강의 용접시 전자세 작업성을 확보하기 위하여 ZrO2, Al2O3, MgO등의 고융점 산화물을 사용하는 방법이 종래에 있었다. 이러한 고융점 산화물을 사용하면, 스테인레스강 용접시, 특히 입향 상진이나 오버헤드의 용접자세에서도 용융 슬래그의 빠른 응고때문에 양호한 작업성을 쉽게 얻을 수 있었다. 그러나 이러한 고융점 산화물의 양이 많아짐에 따라 아크 안정성이 저해되고 스패터 발생이 증가하는 문제가 있으며, 아울러, 전자세 용접작업성을 확보하기 위해서는 상당한 양의 고융점 산화물 사용이 필수적인데 이러한 산화물들을 적정량으로 제어하는 것 역시 쉽지 않다는 문제가 있었다.On the other hand, in order to ensure electron workability when welding stainless steel, there has been a conventional method using high melting point oxides such as ZrO 2 , Al 2 O 3 , MgO. The use of such a high melting point oxide makes it easy to obtain good workability due to the rapid solidification of the molten slag during welding of stainless steel, particularly in the upward orientation or in the weld posture of an overhead. However, as the amount of the high melting point oxide increases, there is a problem that the arc stability is impaired and the spatter generation increases. In addition, in order to secure the electron field welding workability, the use of a large amount of the high melting point oxide is essential. There was a problem that it is not easy to control to an appropriate amount.

특히, 혼합가스를 보호가스로 사용하는 경우에는 고융점 산화물을 용융시키는데 아크 에너지가 다량 소모되므로 모재로 유입되는 열량이 적어져 용입 불량과 같은 용접 결함을 야기하게 되는것을 피할 수 없었다.In particular, when the mixed gas is used as a protective gas, a large amount of arc energy is used to melt the high melting point oxide, so that the amount of heat flowing into the base material is small, which inevitably causes welding defects such as poor penetration.

그러므로 보호가스로서 탄산 가스를 사용할 때에도 스패터 발생량이 적을 뿐만 아니라 혼합가스하에서도 용입성이 양호한 용접 재료의 개발이 지속적으로 요청되고 있는 실정이다.Therefore, even when using carbon dioxide gas as a protective gas, the amount of spatter generated is low, and the development of a welding material having good penetration even under a mixed gas is continuously requested.

따라서 본 발명은 상술한 종래기술의 문제점을 해결하기 위한 것으로, 용접용 와이어를 이루는 Al분말, 슬래그형성제등의 함량과 비를 적절히 제어함으로써 보호가스로서 탄산가스(CO2)나 Ar과 15∼25%CO2혼합가스 중 어느 것을 사용하더라도 양호한 전자세 용접성, 아크 안정성 및 낮은 수준의 스패터 발생량을 얻을 수 있는 오스테나이트계 스테인레스강 용접용 플럭스 충전와이어를 제공함을 그 목적으로 한다.Accordingly, the present invention is to solve the above-mentioned problems of the prior art, by appropriately controlling the content and ratio of Al powder, slag forming agent, and the like forming the welding wire, as a protective gas, carbon dioxide (CO 2 ) or Ar and 15 to It is an object of the present invention to provide a flux filled wire for austenitic stainless steel welding, which can obtain good electromagnetic field weldability, arc stability, and low level of spatter generation using any of 25% CO 2 mixed gas.

상기의 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,

스테인레스강제 외피에 플럭스가 충전된 플럭스 충전와이어에 있어서, 중량%로, TiO2:3.0∼7.0%, SiO2: 0.5∼3.0%, ZrO2: 0.1∼ 1.5%, Al2O3: 0.1∼1.0%, Al분말: 0.3∼1.2%, 금속 불화물: 0.05∼0.5%, Bi2O3: 0.02∼0.15%, K2O+Na2O: 0.05∼0.5%, Si: 0.2~1.2%, Mn: 0.5~3.0%, 잔여 금속성분 및 불가피한 불순물로 이루어지며, Al분말/(TiO2+SiO2+ZrO2)의 값이 0.05∼0.18을 만족하는 오스테나이트계 스테인레스강 용접용 플럭스 충전와이어에 관한 것이다.In the the stainless steel shell filled flux is the flux charging wire, in weight%, TiO 2: 3.0~7.0%, SiO 2: 0.5~3.0%, ZrO 2: 0.1~ 1.5%, Al 2 O 3: 0.1~1.0 %, Al powder: 0.3 to 1.2%, metal fluoride: 0.05 to 0.5%, Bi 2 O 3 : 0.02 to 0.15%, K 2 O + Na 2 O: 0.05 to 0.5%, Si: 0.2 to 1.2%, Mn: Flux filling wire for austenitic stainless steel welding, which is composed of 0.5 to 3.0%, residual metal components and unavoidable impurities, and whose Al powder / (TiO 2 + SiO 2 + ZrO 2 ) values satisfy 0.05 to 0.18. .

이하, 본발명 와이어의 조성성분 및 그 제한이유을 설명한다.Hereinafter, the composition components of the present invention wire and the reason for limitation thereof will be described.

TiO2는 슬래그 형성제로서 아크 안정 효과를 나타내는 성분으로서, 본 발명에서는 TiO2의 함량을 와이어 전중량에 대하여 3.0∼7.0%로 제한한다. 만일 그 함량이 3.0%미만이면 그 첨가에 따른 효과를 기대할 수 없으며, 7.0%를 초과하면 과다한 양의 슬래그가 형성되어 용접 효율의 저하와 함께 혼합가스 사용시 아크 집중이 약해져 적절한 용입이 이루어지지 않기 때문이다.TiO 2 is a slag forming agent and exhibits an arc stabilizing effect. In the present invention, the content of TiO 2 is limited to 3.0 to 7.0% based on the total weight of the wire. If the content is less than 3.0%, the effect of the addition cannot be expected. If the content exceeds 7.0%, excessive amount of slag is formed, which reduces the welding efficiency and the arc concentration becomes weak when the mixed gas is used. to be.

SiO2는 슬래그 형성제이며 슬래그 도포를 균일하게하는 역할을 하는 성분으로, 본 발명에서는 그 함량을 0.5∼3.0%로 제한한다. 만일 그 함량이 0.5%미만이면 그 첨가에 따른 효과를 기대할 수 없으며, 3.0%를 초과하면 슬래그 유동성이 과다하여 슬래그가 비드 하부로 처지기 때문에 비드 형상이 불균일해 질 수 있다.SiO 2 is a slag forming agent and serves to make the slag coating uniform, and in the present invention, the content is limited to 0.5 to 3.0%. If the content is less than 0.5%, the effect of the addition cannot be expected. If the content exceeds 3.0%, the bead shape may be uneven because the slag flows excessively and the slag sags below the bead.

ZrO2는 고융점 산화물로서 입향상진 및 오버헤드(over-head)용접자세에서 용융금속이 흘러내리지 않도록 하는 역할과 슬래그를 균일하게 도포시켜주는 역할을 한다. 본 발명에서는 이러한 ZrO2첨가량을 0.1∼1.5%로 제한하는데, 이는 그 첨가량이 0.1%미만이면 상기 효과가 충분치 못하며, 1.5%를 초과하면 과다한 스패터가 발생할 뿐만 아니라 슬래그 점도가 상승하여 유동성을 저하시키므로 용접비드가 거칠어지기 때문이다.ZrO 2 is a high melting point oxide that prevents molten metal from flowing down in the elevation and overhead welding positions and uniformly applies slag. In the present invention, the amount of ZrO 2 is limited to 0.1 to 1.5%, which is not sufficient if the amount is less than 0.1%. If the amount is more than 1.5%, excessive spatter is generated as well as the slag viscosity is increased to decrease fluidity. This is because the weld bead becomes rough.

Al2O3는 고융점 산화물로서 슬래그 포피성 및 전자세 용접작업성을 향상시키는 역할을 한다. 본 발명에서는 이러한 Al2O3첨가량을 0.1∼1.0%로 제한한다. 왜냐하면 그 첨가량이 0.1%미만이면 첨가에 따른 효과가 불충분하고, 1.0%를 초과하면 아크성 및 혼합가스 용접시 용입성이 감소하기 때문이다.Al 2 O 3 is a high melting point oxide that serves to improve slag foreskinability and electron fine welding workability. In the present invention, the amount of Al 2 O 3 added is limited to 0.1 to 1.0%. This is because if the added amount is less than 0.1%, the effect of the addition is insufficient, and if the added amount is more than 1.0%, the penetration property in arcing and mixed gas welding decreases.

한편, 상술한 바와 같이, 종래에는 용접성을 얻기 위해 ZrO2, Al2O3, MgO 등의 고융점 산화물을 사용하였기 때문에 용접시 아크력의 상당부분이 고융점 산화물을 용융시키는데 사용되었으며, 이에 따라 결과적으로 모재로 용입되는 에너지를 감소시키므로 용입 불량이 발생되었다. 특히, 이점은 혼합 가스를 보호 가스로 사용할 때 더욱 현저하게 나타났다.Meanwhile, as described above, since a high melting point oxide such as ZrO 2 , Al 2 O 3 , MgO, and the like is used in the related art, a large portion of the arc force during welding was used to melt the high melting point oxide. As a result, since the energy to be injected into the base material is reduced, poor penetration occurs. In particular, the advantages are even more pronounced when using mixed gases as protective gases.

따라서 본 발명에서는 상기 종래기술의 문제를 해소하고 우수한 용입성과, 전자세 용접성, 낮은 수준의 스패터 발생을 확보하기 위하여 Al 분말을 소정량 첨가함을 특징으로 한다.Therefore, the present invention is characterized by adding a predetermined amount of Al powder in order to solve the problems of the prior art and to ensure excellent penetration, electron fine weldability, low level spatter generation.

Al 분말은 그 융점이 약 660℃정도로서 상기 고융점 산화물들의 융점(2000℃이상)보다 현저히 낮다. 그 결과, 보다 적은 에너지로 용융이 가능하여 모재로 유입되는 에너지를 증가시킬 수 있다. 또한, Al분말은 용융 슬래그중 산소와 반응하여 Al2O3를 형성하며, 플럭스중에 첨가된 Al2O3와 동일하게 고융점 슬래그를 형성하여 전자세 용접을 가능하게 할 뿐만 아니라 아크 안정성에 우수한 효과를 발휘하여 스패터 발생을 억제하는 역할을 한다. 그리고 이러한 Al분말외에 Mg,Zr등의 금속분말도 상술한 목적을 위해 사용할 수 있지만, Mg,Zr등의 금속 분말을 사용하면 아크 안정성이 급격히 열화되어 스패터 발생량이 증가하므로 본 발명에서는 이들을 배제하였다.Al powder has a melting point of about 660 ° C., which is significantly lower than that of the high melting point oxides (above 2000 ° C.). As a result, it is possible to melt with less energy to increase the energy flowing into the base material. In addition, Al powder is melted to react with the oxygen in the slag to form the Al 2 O 3, to form the same high-melting-point slag and the Al 2 O 3 added in the flux as well as enabling the electronic three welding excellent in arc stability It is effective in suppressing spatter generation. In addition to the Al powder, metal powders such as Mg and Zr may also be used for the above-mentioned purposes. However, when metal powders such as Mg and Zr are used, the arc stability rapidly deteriorates and the amount of spatters is increased. .

본 발명에서는 Al분말의 첨가량을 0.3∼1.2%로 제한함이 바람직하다. 만일 그 첨가량이 0.3%미만이면 그 첨가에 따른 효과가 미비하고, 1.2%를 초과하면 아크 안정성에 악영향을 줄 수 있기 때문이다.In the present invention, the addition amount of Al powder is preferably limited to 0.3 to 1.2%. If the addition amount is less than 0.3%, the effect of the addition is inadequate, and if it exceeds 1.2%, it may adversely affect the arc stability.

금속 불화물은 용접시에 피트(Pit), 블로우홀(Blow Hole)등의 용접 결함을 억제하기 위하여 일반적으로 사용된다. 본 발명에서는 NaF, Na3AlF6, K2SiF6등의 금속 불화물중에서 선택된 1종 이상을 첨가하며, 이때 그 첨가량을 0.05∼0.5%로 제한한다. 만일 그 첨가량이 0.05%미만이면 상기 효과가 불충분하며 0.5%를 초과하면 흄(Fume)발생량이 증가하기 때문이다.Metal fluorides are generally used to suppress welding defects such as pits and blow holes during welding. In the present invention, at least one selected from metal fluorides such as NaF, Na 3 AlF 6 , and K 2 SiF 6 is added, and the amount thereof is limited to 0.05 to 0.5%. If the amount is less than 0.05%, the effect is insufficient, and if the amount exceeds 0.5%, the amount of fume is increased.

Bi2O3는 슬래그 박리성을 향상시키기 위하여 첨가되는 성분으로, 본 발명에서는 그 첨가량을 0.02∼0.15%로 제한한다. 왜냐하면 그 첨가량이 0.02%미만이면 상기 효과가 충분치 못하며 0.15%를 초과하면 입향 상진자세의 용접시에 용융 슬래그가 처지는 문제가 발생하기 때문이다.Bi 2 O 3 is a component added to improve slag peelability, and the amount of Bi 2 O 3 is limited to 0.02 to 0.15% in the present invention. This is because if the addition amount is less than 0.02%, the above effect is not sufficient. If the addition amount is more than 0.15%, there is a problem that the molten slag sags during the welding of the upright posture.

K2O와 Na2O는 아크 안정제로써 첨가되는데, 본 발명에서는 이들의 합을 0.05∼0.5%로 제한한다. 만일 그 합이 0.05%미만이면 상기 효과가 충분치 못하고, 0.5%를 초과하면 보호가스로 혼합가스를 사용할 때, 아크의 집중력이 약화되어 충분한 용입이 이루어지지 않기 때문이다.K 2 O and Na 2 O are added as arc stabilizers, which limit their sum to 0.05-0.5% in the present invention. If the sum is less than 0.05%, the above effect is insufficient. If the sum exceeds 0.5%, the concentration of the arc is weakened when sufficient gas is used as the protective gas, so that sufficient penetration is not achieved.

Si과 Mn은 외피에 필수적으로 함유되는 성분이며 플럭스 중에 탈산효과를 위하여 임의로 첨가할 수도 있다. 본 발명에서는 이들 Si와 Mn의 첨가량을 각각 0.2~1.2%, 0.5~3.0%로 제한하는데, 이는 이러한 성분들의 첨가량이 과도하게 많으면 아크 안정성이 저하되어 스패터 발생이 증가하며, 과소하면 탈산 효과가 충분치않기 때문이다.Si and Mn are essential components in the shell and may be optionally added in the flux for deoxidation effect. In the present invention, the addition amount of Si and Mn is limited to 0.2-1.2% and 0.5-3.0%, respectively, which means that excessively large amounts of these components decrease arc stability and increase spatter generation. It is not enough.

한편, 본 발명에서는 보호가스로서 탄산 가스나 혼합가스 모두에서 양호한 전자세 용접작업성과 충분한 용입 및 낮은 수준의 스패터 발생량을 확보할 수 있도록 Al/(TiO2+SiO2+ZrO2)를 0.05∼0.18의 범위로 제어할 것이 요구된다.On the other hand, in the present invention, Al / (TiO 2 + SiO 2 + ZrO 2 ) is 0.05 to 20 so as to secure good electron welding workability, sufficient penetration, and low level of spatter generation in both carbon dioxide gas and mixed gas as the protective gas. Control in the range of 0.18 is required.

만일 Al/(TiO2+SiO2+ZrO2)의 값이 0.05 미만이면 주요 슬래그 형성제에 대한 Al의 함량이 낮아 혼합가스를 사용하여 용접할 때 충분한 용입이 이루어지지 못하고 입향 상진에서의 용접성이 저하되며, 0.18을 초과하면 Al함량이 과다하고 슬래그 형성제의 비율이 낮아 아크 안정성이 저하되고 스패터 발생이 증가할 수 있다.If the value of Al / (TiO 2 + SiO 2 + ZrO 2 ) is less than 0.05, the Al content of the main slag forming agent is low, so that sufficient penetration cannot be achieved when welding using a mixed gas, and weldability in the upstream direction is high. When it is lowered, if it exceeds 0.18, the Al content is excessive and the proportion of the slag forming agent is low, so that the arc stability may be lowered and spatter generation may increase.

본 발명의 와이어는 또한 일반적인 스테인레스강 용접용 플럭스 충전 와이어의 경우와 동일한 이유로 금속성분으로서 Fe,Ni,Cr,Mo,Nb 등을 포함하는데, 이는 본원이 속하는 기술분야에서 자명한 사항이므로 그 구체적인 성분범위를 설명하지 않는다.The wire of the present invention also includes Fe, Ni, Cr, Mo, Nb, etc. as a metal component for the same reason as in the case of a flux filling wire for general stainless steel welding, which is obvious in the technical field to which the present application belongs, its specific component Do not describe the range.

이하 실시예를 통하여 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail through examples.

(실시예)(Example)

표 2와 같이 그 조성을 달리하는 플럭스를 마련하였으며, 이들을 스테인레스강제 외피에 15∼20%의 충전율로 충전하여 스테인레스강 용접용 플럭스 충전와이어 를 각각 제조하였다. 이때, 사용된 304L 스테인레스강제 외피의 화학 조성은 표 1과 같다.As shown in Table 2, fluxes having different compositions were prepared, and these were filled in a stainless steel outer shell at a filling rate of 15 to 20% to prepare flux filling wires for stainless steel welding. At this time, the chemical composition of the 304L stainless steel sheath used is shown in Table 1.

이와 같이 제조된 와이어를 이용하여 표 3의 용접조건으로 용접을 실시하였으며, 이때, 스패터 발생량, 혼합가스를 사용하여 용접하였을때의 용입성, 입향상진 용접성 및 아크 안정성을 육안으로 확인하여 그 측정결과를 표 4에 나타내었다.Welding was performed under the welding conditions shown in Table 3 by using the wires manufactured as described above. At this time, the amount of spatter generated, the penetration property when welded using the mixed gas, the enhanced weldability, and the arc stability were visually confirmed and measured. The results are shown in Table 4.

표 4에서 ◎는 우수, ○는 보통, ×는 불량을 나타낸다.In Table 4, (circle) is excellent, (circle) is normal, and x represents a defect.

구분division CC SiSi MnMn PP SS NiNi CrCr MoMo 함량(중량%)Content (% by weight) 0.0230.023 0.540.54 1.101.10 0.0200.020 0.0080.008 10.110.1 18.3018.30 0.100.10

비교예Comparative example 발명예Inventive Example 1One 22 33 44 55 66 77 88 99 1010 1111 1212 1313 슬래그형성제Slag forming agent TiO2 TiO 2 2.272.27 7.507.50 4.504.50 3.903.90 8.208.20 5.135.13 4.084.08 4.574.57 6.606.60 3.883.88 5.775.77 4.674.67 3.853.85 SiO2 SiO 2 0.640.64 0.450.45 1.651.65 0.880.88 3.503.50 1.111.11 0.610.61 1.831.83 1.441.44 0.950.95 2.712.71 1.391.39 0.730.73 ZrO2 ZrO 2 0.210.21 1.271.27 2.002.00 0.570.57 1.481.48 0.050.05 0.210.21 0.820.82 0.910.91 0.730.73 0.260.26 0.310.31 1.391.39 Al2O3 Al 2 O 3 0.340.34 0.690.69 0.080.08 1.201.20 0.330.33 0.610.61 0.140.14 0.380.38 0.510.51 0.920.92 0.880.88 0.290.29 0.120.12 Na2O+K2ONa 2 O + K 2 O 0.600.60 0.390.39 0.070.07 0.220.22 0.480.48 0.030.03 0.160.16 0.170.17 0.090.09 0.420.42 0.280.28 0.370.37 0.220.22 금속불화물Metal fluoride 0.030.03 0.410.41 0.190.19 0.350.35 0.260.26 0.240.24 0.650.65 0.140.14 0.440.44 0.210.21 0.050.05 0.100.10 0.340.34 Bi2O3 Bi 2 O 3 0.040.04 0.060.06 0.180.18 0.060.06 0.030.03 0.090.09 0.050.05 0.050.05 0.060.06 0.100.10 0.030.03 0.030.03 0.050.05 SiSi 0.710.71 0.930.93 0.760.76 0.510.51 0.370.37 1.041.04 0.880.88 0.410.41 0.320.32 1.131.13 0.780.78 0.770.77 0.560.56 MnMn 2.072.07 1.621.62 1.811.81 2.542.54 2.042.04 1.881.88 0.780.78 1.951.95 2.002.00 1.791.79 0.830.83 2.812.81 2.012.01 Al분말Al powder 0.410.41 1.151.15 1.581.58 1.501.50 0.370.37 0.150.15 0.200.20 0.710.71 1.131.13 0.380.38 0.500.50 0.990.99 0.700.70 Al분말/(TiO2+SiO2+ZrO2)Al powder / (TiO 2 + SiO 2+ ZrO 2 ) 0.130.13 0.120.12 0.190.19 0.280.28 0.030.03 0.020.02 0.040.04 0.100.10 0.130.13 0.070.07 0.060.06 0.160.16 0.120.12 잔여residual Fe +Ni+Cr+Mo+Nb+불순물Fe + Ni + Cr + Mo + Nb + Impurities

용접자세Welding position 전류(A)Current (A) 전압(V)Voltage (V) 용접속도(cpm)Welding speed (cpm) 와이어 돌출길이(mm)Wire protrusion length (mm) 극성polarity 보호가스Protective gas 수평필렛Horizontal Fillet 200200 2929 20-3020-30 15-2515-25 DCEPDCEP 탄산가스 및혼합가스CO2 & MIXED GAS 입향상진Promotion 160160 2525 6-106-10

구 분division 비교예Comparative example 발명예Inventive Example 1One 22 33 44 55 66 77 88 99 1010 1111 1212 1313 스패터 발생Spatter generation ×× ○○ ×× ×× ○○ ○○ ○○ ○○ ◎◎ ○○ ◎◎ ◎◎ ○○ 혼합가스 용접에서의 용입성Weldability in Mixed Gas Welding ×× ×× ○○ ○○ ×× ×× ×× ◎◎ ◎◎ ◎◎ ◎◎ ○○ ◎◎ 입향상진용접성Enhanced Weldability ○○ ○○ ○○ ○○ ×× ×× ×× ◎◎ ◎◎ ○○ ○○ ◎◎ ◎◎ 아크 안정성Arc stability ○○ ○○ ×× ×× ○○ ×× ○○ ◎◎ ○○ ◎◎ ◎◎ ◎◎ ○○

표 2 및 표 4로부터 알 수 있는 바와 같이, 그 주요성분의 범위 및 Al분말/(TiO2+SiO2+ZrO2) 값이 적정범위로 제어된 본 발명예(8∼13)의 경우 모든 측정항목에서 우수한 결과를 보여줌을 알 수 있다.As can be seen from Table 2 and Table 4, all the measurements were made in the case of the inventive examples (8 to 13) in which the range of the main components and the Al powder / (TiO 2 + SiO 2 + ZrO 2 ) values were controlled in an appropriate range. It can be seen that the results show excellent results.

반면, 비교예(5,6,7)은 Al분말/(TiO2+SiO2+ZrO2) 값이 본 발명의 범위에 미치지 못하여 보호가스로서 혼합가스를 사용한 용접에서의 용입성이 열악하고 입향 상진 용접성이 불량하였으며, 비교예(3~4)는 그 범위를 초과하여 스패터 발생이 매우 많았다.On the other hand, Comparative Example (5, 6, 7) is the Al powder / (TiO 2 + SiO 2 + ZrO 2 ) value does not fall within the scope of the present invention, so poor penetration in welding using a mixed gas as a protective gas and oriented The advancing weldability was poor, and the comparative examples (3-4) exceeded the range, and generation | occurrence | production of the spatter was very high.

또한, 비교예(1)은 TiO2의 함량이 너무 낮아 스패터 발생이 많았고 아크 안정제가 과다하여 혼합가스 용접에서의 용입성이 불량하였다. 그리고 비교예(2)는 TiO2의 함량이 너무 많아 보호가스로서 혼합가스 사용할 때 용입성이 불량하였다.In addition, in Comparative Example (1), the content of TiO 2 was too low, so that spatter was generated, and the arc stabilizer was excessive, resulting in poor penetration in mixed gas welding. In Comparative Example (2), the content of TiO 2 was too high, solubility was poor when the mixed gas was used as the protective gas.

상술한 바와 같이 본 발명은, 다량의 고융점 금속 산화물대신 상대적으로 융점이 낮은 Al분말을 사용하며, Al분말과 (TiO2+SiO2+ZrO2)와의 비율을 적정범위로 제어하여 탄산가스(CO2)나 Ar과 15∼25%CO2혼합가스 중 어느 보호가스로 용접하더라도 충분한 용입과 낮은 스패터 발생량을 얻을 수 있는 오스테나이트계 스테인레스강 용접용 플럭스 충전와이어를 제공함에 유용하다.As described above, the present invention uses a relatively low melting point Al powder instead of a large amount of high melting point metal oxide, and controls the ratio between the Al powder and (TiO 2 + SiO 2 + ZrO 2 ) in an appropriate range to allow carbon dioxide gas ( It is useful to provide a flux filled wire for austenitic stainless steel welding which can achieve sufficient penetration and low spatter generation even when welding with CO 2 ) or Ar and 15-25% CO 2 mixed gas.

Claims (1)

스테인레스강 외피에 플럭스가 충전된 플럭스 충전와이어에 있어서,In flux-filled wires in which stainless steel sheaths are filled with flux, 중량%로, TiO2:3.0∼7.0%, SiO2: 0.5∼3.0%, ZrO2: 0.1∼ 1.5%, Al2O3: 0.1∼1.0%, Al분말: 0.3∼1.2%, 금속 불화물: 0.05∼0.5%, Bi2O3: 0.02∼0.15%, K2O+ Na2O: 0.05∼0.5%, Si: 0.2~1.2%, Mn: 0.5~3.0%, 잔여 금속성분 및 불가피한 불순물로 이루어지며, Al분말/(TiO2+SiO2+ZrO2)의 값이 0.05∼0.18을 만족하는 오스테나이트계 스테인레스강 용접용 플럭스 충전와이어By weight%, TiO 2 : 3.0 to 7.0%, SiO 2 : 0.5 to 3.0%, ZrO 2 : 0.1 to 1.5%, Al 2 O 3 : 0.1 to 1.0%, Al powder: 0.3 to 1.2%, Metal fluoride: 0.05 -0.5%, Bi 2 O 3 : 0.02-0.15%, K 2 O + Na 2 O: 0.05-0.5%, Si: 0.2-1.2%, Mn: 0.5-3.0%, consisting of residual metal components and inevitable impurities, Flux Filling Wire for Austenitic Stainless Steel Welding with Al Powder / (TiO 2 + SiO 2 + ZrO 2 ) Values of 0.05 to 0.18
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CN113399865A (en) * 2021-07-20 2021-09-17 哈尔滨工业大学（威海） Slag full-coverage type non-splashing flux-cored wire
JP2022162832A (en) * 2021-04-13 2022-10-25 株式会社神戸製鋼所 Low transformation temperature flux-cored wire
CN116652451A (en) * 2023-06-20 2023-08-29 中国核工业二三建设有限公司 Stainless steel high penetration welding activator and stainless steel high penetration welding method

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JP2022162832A (en) * 2021-04-13 2022-10-25 株式会社神戸製鋼所 Low transformation temperature flux-cored wire
CN113399865A (en) * 2021-07-20 2021-09-17 哈尔滨工业大学（威海） Slag full-coverage type non-splashing flux-cored wire
CN116652451A (en) * 2023-06-20 2023-08-29 中国核工业二三建设有限公司 Stainless steel high penetration welding activator and stainless steel high penetration welding method

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