KR20090070278A - Titania based flux cored wire for gas shielded arc welding - Google Patents

Titania based flux cored wire for gas shielded arc welding Download PDF

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KR20090070278A
KR20090070278A KR1020070138232A KR20070138232A KR20090070278A KR 20090070278 A KR20090070278 A KR 20090070278A KR 1020070138232 A KR1020070138232 A KR 1020070138232A KR 20070138232 A KR20070138232 A KR 20070138232A KR 20090070278 A KR20090070278 A KR 20090070278A
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welding
weld metal
wire
based flux
arc welding
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KR1020070138232A
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KR100909022B1 (en
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유철
김용덕
김주석
김영천
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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
    • 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
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053—Fe as the principal constituent
    • 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
    • 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
    • B23K35/40—Making wire or rods for soldering or welding
    • B23K35/406—Filled tubular wire or rods
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

A titania based flux cored wire for the gas-shielded arc welding is provided to increase the weld workability in the high heat input high efficiency welding by controlling ratio according to the property of a component and an oxide of the wire. A titania based flux cored wire for the gas-shielded arc welding comprises followings. C is contained in an outer cover and a flux of the wire in order to prevent oxide inclusion from penetrating into weld metal inside while maintaining intensity of the weld metal. Mn reduces the amount of oxygen as deoxidant within the weld metal. And the intensity of the weld metal is maintained. BN generates BN in the welding in order to suppress the production of the grain boundary ferrite and increase the intensity and toughness of a welding part by micronizing organization.

Description

가스실드 아크 용접용 티타니아계 플럭스 충전 와이어{Titania Based Flux Cored Wire For Gas Shielded Arc Welding}Titania Based Flux Cored Wire For Gas Shielded Arc Welding}

본 발명은 대입열 고능률의 티타니아계 용접용 플럭스 충전 와이어에 관한 것으로, 보다 상세하게는 용접금속 이면의 극저온 충격인성 및 용접작업성이 우수한 가스실드 아크 용접용 티타니아계 플럭스 충전 와이어에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a titania-based flux filling wire having high heat input, and more particularly, to a titania-based flux filling wire for gas shield arc welding having excellent cryogenic impact toughness and weldability on the back side of a weld metal.

일반적으로 티타니아계 플럭스 충전 와이어는 용접작업성은 양호하나, 용접금속의 저온 충격인성, 특히 이면 충격인성이 크게 저하되는 특징이 있다. 그 원인으로는 용접에 사용되는 이당재(Backing Material)를 들 수 있다. 이당재는 그 주성분이 SiO2, Al2O3, MgO와 같은 산화물로서 용접시에 개재물 형태로 용접부로 유입되게 되는데, 이로인해 용접시 용융금속의 응고속도가 다른 부위에 비해 상대적으로 빨라 충격인성이 낮은 경화 조직을 형성시키기 때문이다. 최근 조선, 해양 구조물 분야에서 후판화 및 대형화 등이 전반적인 추세이기 때문에, 40mm이상 후판의 사용이 증대되며 용접금속의 충격인성, 특히 이면부 충격인성의 중요성이 크게 대두되어지고 있다. 그러나, 현재까지 개발되어진 용접재료로서는 이와 같은 필요를 충족시키기가 어려운 실정이다. In general, the titania-based flux-filled wire has a good welding workability, but the low-temperature impact toughness of the weld metal, particularly the back impact toughness, is greatly reduced. The reason for this is the backing material used for welding. The disaccharide is composed of oxides such as SiO 2 , Al 2 O 3 and MgO, which is introduced into the welded part in the form of inclusions during welding, which causes the solidification rate of the molten metal to be relatively high compared to other parts. This is because it forms a low hardened tissue. In recent years, since heavy plates and large scales are widely used in shipbuilding and offshore structures, the use of thick plates of 40 mm or more has increased, and the impact toughness of the weld metal, particularly the impact toughness of the back surface, has been increasing. However, it is difficult to meet such a need as a welding material developed to date.

상기와 같은 티타니아계 플럭스 충전 와이어의 문제점을 해결하기 위한 종래기술의 경우, -20℃까지의 용접금속 충격인성은 확보가 가능하나, 보다 저온에서의 충격인성은 다소 미흡하여 그 적용이 제한적이다. In the prior art for solving the problems of the titania-based flux filling wire as described above, it is possible to secure the weld metal impact toughness up to -20 ℃, but the impact toughness at a lower temperature is somewhat insufficient and its application is limited.

또한, 종래 기술들은 후판의 대입열 고능률 용접시, 안정적인 극저온 이면 충격인성을 확보하는데는 미흡하였다. In addition, the prior arts are insufficient to ensure a stable cryogenic back impact toughness in the high efficiency heat input welding of the thick plate.

본 발명은 상기 종래 기술의 문제점을 해결하기 위한 것으로, 와이어의 성분 조성과 산화물의 특성에 따른 비를 적절히 제어함으로써, 용접금속의 극저온 이면 충격인성 및 용접작업성이 우수한 가스실드 아크 용접용 티타니아계 플럭스 충전 와이어를 제공하는데 그 목적이 있다.The present invention is to solve the problems of the prior art, by controlling the ratio according to the component composition of the wire and the characteristics of the oxide, the titania system for gas shielded arc welding excellent in cryogenic back impact toughness and welding workability of the weld metal The purpose is to provide a flux filling wire.

상기 목적을 달성하기 위한 본 발명의 가스실드 아크 용접용 티타니아계 플럭스 충전 와이어는, 와이어 전중량에 대한 중량%로, C:0.02~0.10%, TiO2:3~10%, Mn:0.7~2.0%, B:0.0010~0.0045%, SiO2:0.1~0.8%, (Al2O3+ ZrO2):0.1~1.2%, (CaO+MgO)：0.08~1.50%, (Na2O+K2O):0.05~1.00%를 포함하고, (CaO+MgO + 2.5(Na2O+K2O))/(SiO2 + 0.1TiO2 + 0.5(Al2O3+ZrO2))의 비가 1~4인 것을 특징으로 한다. Titania-based flux-filled wire for gas shield arc welding of the present invention for achieving the above object, in the weight% of the total weight of the wire, C: 0.02 ~ 0.10%, TiO 2 : 3 ~ 10%, Mn: 0.7 ~ 2.0 %, B: 0.0010 to 0.0045%, SiO 2 : 0.1 to 0.8%, (Al 2 O 3 + ZrO 2 ): 0.1 to 1.2%, (CaO + MgO): 0.08 to 1.50%, (Na 2 O + K 2 O): 0.05 to 1.00%, the ratio of (CaO + MgO + 2.5 (Na 2 O + K 2 O)) / (SiO 2 + 0.1 TiO 2 + 0.5 (Al 2 O 3 + ZrO 2 )) 1 It is characterized by being 4.

나아가, 상기 가스실드 아크 용접용 티타니아계 플럭스 충전 와이어는 Ni가 0.2~2.7% 추가로 포함되는 것을 특징으로 한다.Further, the titania-based flux filling wire for gas shield arc welding is characterized in that the Ni is added additionally 0.2 to 2.7%.

대입열 고능률 용접시 용접금속 이면 극저온 충격인성 및 용접작업성이 개선 되는 유용한 효과가 있다.When the high efficiency of high heat input welding, the back side of the welding metal has the useful effect of improving the cryogenic impact toughness and welding workability.

이하, 본 발명의 조성범위의 한정이유에 대하여 설명한다. Hereinafter, the reason for limitation of the composition range of this invention is demonstrated.

C의 함량: 0.02~0.10% (이하, 중량%)C content: 0.02 ~ 0.10% (hereinafter, by weight)

C는 본 발명 와이어의 외피 및 플럭스에 함유되는 것으로, 용접금속의 강도를 유지하고 산화개재물(MnS, Al2O3, SiO2등)이 용접금속 내부로 침투하는 것을 억제하여 건전한 용접부를 형성하게 한다. 또한, 아크력을 증대시켜 용입을 충분하게 하므로써 용입부족을 막아 주는 역할을 한다. 본 발명에서는 탄소의 함유량을 와이어에 대한 중량%(이하, 단지 %라 한다)로 0.02~0.10%로 제한함이 바람직하다. 왜냐하면 그 함유량이 0.02% 미만이면 용접금속의 인성 및 인장 성능이 열화되고, 반면에 0.10%를 초과하면 강도가 과도하게 높아지고 고온균열 저항성이 열화되기 때문이다. C is contained in the shell and flux of the wire of the present invention to maintain the strength of the weld metal and to prevent the oxidation inclusions (MnS, Al 2 O 3 , SiO 2, etc.) from penetrating into the weld metal to form a healthy weld. do. In addition, it serves to prevent the lack of penetration by increasing the arc force to the sufficient penetration. In the present invention, it is preferable to limit the content of carbon to 0.02 to 0.10% by weight% of the wire (hereinafter referred to simply as%). This is because if the content is less than 0.02%, the toughness and tensile performance of the weld metal deteriorates, whereas if it exceeds 0.10%, the strength is excessively high and the high temperature cracking resistance deteriorates.

TiO2의 함량: 3~10%TiO 2 content: 3 ~ 10%

TiO2는 용접시 주된 슬래그 형성제로서 용접과정 중 대기로부터 용융지(용융금속)를 보호하는 역할을 한다. 본 발명에서는 TiO2의 함유량을 3~10%로 제한함이 바람직하다. 왜냐하면 그 함유량이 3% 미만이면 아크가 불안하며 슬래그량이 부족 하여 용융금속을 대기로부터 충분히 보호할 수가 없고, 반면에 10%를 초과하면 슬래그 형성이 과다하고 유동성이 저하되며 슬래그의 일부가 용접금속 내부에 혼입되어 용접부의 기계적 성능이 크게 열화되기 때문이다. TiO 2 is the main slag forming agent in welding and protects the molten pool (molten metal) from the atmosphere during welding. In the present invention, it is preferable to limit the content of TiO 2 to 3 to 10%. If the content is less than 3%, the arc is unstable and the amount of slag is insufficient to protect the molten metal from the atmosphere. On the other hand, if the content is more than 10%, the slag formation is excessive and fluidity is deteriorated. This is because the mechanical performance of the welded portion is greatly degraded due to mixing in.

Mn의 함량: 0.7~2.0%Mn content: 0.7 ~ 2.0%

Mn은 탈산제로서 용접금속내 산소량을 저감시키며, 용접금속의 강도를 유지함과 아울러 비드의 외관과 형상을 향상시키는 역할을 한다. 본 발명에서는 Mn을 0.7 ~ 2.0%로 제한함이 바람직한데, 이는 그 함량이 0.7%미만에서는 용접금속의 인장강도 및 충격인성이 저하되며, 2.0%를 초과하면 아크가 불안정해지고 용융성이 저하되며, 고온균열 발생 우려가 있기 때문이다. Mn serves as a deoxidizer to reduce the amount of oxygen in the weld metal, maintain the strength of the weld metal, and improve the appearance and shape of the bead. In the present invention, it is preferable to limit Mn to 0.7 to 2.0%, which is less than 0.7%, the tensile strength and impact toughness of the weld metal is lowered, if the content exceeds 2.0% the arc is unstable and meltability is lowered This is because high temperature cracks may occur.

B의 함량: 0.0010~0.0045%B content: 0.0010 ~ 0.0045%

B는 용접시에 BN을 형성하여 입계 페라이트의 생성을 억제하고 조직을 미세화시키므로써 용접부의 강도 및 인성을 증가시킨다. 본 발명에서는 B의 함유량을 0.0010~0.0045%로 제한함이 바람직한데, 이는 0.0010%미만에서는 소정의 효과를 나타내지 못하고, 0.0045%를 초과하면 고온균열이 발생할 우려가 크기 때문이다. B forms BN during welding, thereby suppressing the formation of grain boundary ferrite and miniaturizing the structure, thereby increasing the strength and toughness of the weld. In the present invention, it is preferable to limit the content of B to 0.0010 ~ 0.0045%, because it does not exhibit a predetermined effect at less than 0.0010%, it is because there is a high risk of high temperature cracking if it exceeds 0.0045%.

SiO2의 함량: 0.1~0.8%SiO 2 content: 0.1 ~ 0.8%

SiO2는 산성계 산화물로써 본 발명에서는 용접작업성 및 양호한 비드 형성을 위하여 0.1~0.8%로 제한함이 바람직한데, 그 함유량이 0.1%미만에서는 소정의 효과를 볼 수 없고, 0.8%를 초과하면 슬래그의 유동성이 열화되고 일부가 개재물로서 용접금속 내로 유입되어 충격인성을 저하시킬 수 있다. SiO 2 is an acidic oxide, and in the present invention, it is preferable to limit it to 0.1 to 0.8% for weldability and good bead formation. If the content is less than 0.1%, a predetermined effect is not obtained, and if it exceeds 0.8%, The flowability of the slag may deteriorate and some may flow into the weld metal as inclusions to reduce the impact toughness.

(Al2O3+ ZrO2)의 함량: 0.1~1.2%Content of (Al 2 O 3 + ZrO 2 ): 0.1-1.2%

Al2O3 및 ZrO2는 본 발명에서 슬래그 유동성 및 V-up자세 용접시 용접작업성 및 슬래그 박리성 향상을 위하여 0.1~1.2%로 제한함이 바람직한데, 그 합이 0.1% 미만에서는 소정의 효과를 나타낼 수 없고, 1.2%를 초과하면 슬래그 유동성이 열화되고 개재물로서 용접금속내에 산화물로 유입되어 충격인성을 저하시킬 수 있다.Al 2 O 3 and ZrO 2 in the present invention is preferably limited to 0.1 to 1.2% in order to improve the weldability and slag peelability during slag flowability and V-up posture welding, if the sum is less than 0.1% If it is not effective, if it exceeds 1.2%, slag fluidity deteriorates and the impact toughness may be lowered as an inclusion into the oxide into the weld metal.

(CaO+MgO)의 함량： 0.08~1.50%Content of (CaO + MgO) ： 0.08 ~ 1.50%

CaO 및 MgO는 염기성계 산화물로서 대입열 용접시 이당재에 포함된 불순물이 용접부내로 침투하는 것을 억제시켜 용접금속의 건전성을 향상시키고 양호한 비드의 형성을 이루기 위하여 첨가되는데, 그 합을 0.08~1.50%로 제한함이 바람직하다. 0.08% 미만에서는 첨가에 따른 효과를 볼 수 없고, 1.50%를 초과하면 용접작업성이 저하된다. CaO and MgO are basic oxides, which are added to improve the integrity of weld metal and to form good beads by suppressing the infiltration of impurities contained in the disaccharide into the weld during high heat input welding.The sum is 0.08 ~ 1.50% Limited to. If it is less than 0.08%, the effect of addition cannot be seen, and if it exceeds 1.50%, weldability will fall.

(Na2O+K2O)의 함량: 0.05~1.00%Content of (Na 2 O + K 2 O): 0.05 ~ 1.00%

Na2O 및 K2O는 염기성계 산화물로써 대입열 용접시 용접금속의 건전성 향상 및 아크 안정성 향상을 위해 첨가되며, 그 합을 0.05~1.00%로 제한함이 바람직한데, 그 합이 0.05%미만에서는 첨가에 따른 효과를 볼 수 없고, 1.00%를 초과하면 아크가 불안정해지고 스패터 발생이 많아지며 비드외관이 불량해진다. Na 2 O and K 2 O are basic oxides, which are added to improve the integrity and arc stability of weld metal during high heat input welding, and it is preferable to limit the sum to 0.05 ~ 1.00%, the sum is less than 0.05%. The effect of the addition is not observed at, and when it exceeds 1.00%, the arc becomes unstable, the spatter is more generated, and the appearance of beads is poor.

본 발명에서는 성분별 염기도 및 응고특성을 고려하여,In the present invention, considering the basicity and coagulation characteristics of each component,

(CaO + MgO + 2.5(Na2O+K2O))/(SiO2 + 0.1TiO2 + 0.5(Al2O3+ZrO2))의 비를 1 ~ 4로 하는 것이 바람직하다. 이는 후판 대입열 고능률 용접 특성상, 아크안정성 및 슬래그 유동성이 중요한 요소이며, 또한 용접금속 이면부의 빠른 냉각속도 및 이당재로부터 유입되는 불순물에 따른 용접금속 이면의 충격인성 저하를 방지하는 것이 매우 중요하기 때문이다. To the ratio of (CaO + MgO + 2.5 (Na 2 O + K 2 O)) / (SiO 2 + 0.1TiO 2 + 0.5 (Al 2 O 3 + ZrO 2)) to 1 to 4 are preferred. It is important for arc stability and slag fluidity to be important due to the high efficiency of plate heat input and high efficiency welding, and it is very important to prevent the rapid cooling rate of the back side of the weld metal and the impact toughness of the back side of the weld metal due to impurities flowing from the diluent. Because.

그 비가 1~4 에서는 후판 대입열 고능률 용접시, 용접작업성 및 용접금속 이면부의 충격인성이 우수하다. 그러나, 그 비가 1미만에서는 용접작업성은 양호하나 산성계 산화물의 과다로 용접금속 이면 충격인성이 크게 저하되고, 그 비가 4를 초과하게되면 스패터가 증가하고 용접금속의 응고속도가 크게 저하되어 용접작업성을 해친다. When the ratio is 1 to 4, the welding workability and impact toughness at the back side of the weld metal are excellent in the high efficiency welding of heavy plate heat input. However, if the ratio is less than 1, the welding workability is good, but the impact toughness of the back side of the weld metal is greatly reduced due to the excessive amount of acidic oxide. If the ratio exceeds 4, the spatter increases and the solidification rate of the weld metal is greatly decreased, so the welding Hurt workability.

나아가 본 발명의 가스실드 아크 용접용 티타니아계 플럭스 충전 와이어는 Ni를 함유할 수 있다. Ni는 오스테나이트 안정화 원소로서 -30℃이하의 저온에서 충격인성을 안정화시키는 유효한 성분으로, 첨가할 경우, 그 함량범위를 0.2~2.7%로 하는 것이 바람직하다. 그 이유는 상기 Ni함량이 0.2%미만에서는 첨가하는데 따른 충격인성의 향상효과를 나타낼 수 없고, 2.7%를 초과하면 용접금속의 강도가 과도하게 증가하고 아크 불안을 야기할 수 있기 때문이다. Furthermore, the titania-based flux filled wire for gas shielded arc welding of the present invention may contain Ni. Ni is an austenite stabilizing element and is an effective component for stabilizing impact toughness at a low temperature of −30 ° C. or lower, and when added, the content range is preferably 0.2 to 2.7%. The reason for this is that when the Ni content is less than 0.2%, the effect of improving the impact toughness due to addition cannot be exhibited, and when the Ni content exceeds 2.7%, the strength of the weld metal may be excessively increased and cause arc instability.

본 발명의 플럭스 충전 와이어는 보호가스로써, CO2 가스 혹은 CO2, Ar, He등의 가스를 혼합한 가스 중 어느 것이라도 사용 가능하다. Flux filling wire of the present invention is a protective gas, CO 2 Any of gas or a mixture of gases such as CO 2 , Ar, and He may be used.

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

하기 표 1과 같은 조성을 갖는 와이어 직경 1.4mm의 가스실드 아크 용접용 플럭스 충전 와이어를 각각 마련하였으며, 이때, 사용된 강재외피의 조성을 외피 전 중량에 대한 중량%로 하기 표 2에 나타내었다. The flux filling wires for gas shield arc welding having a wire diameter of 1.4 mm having the composition as shown in Table 1 were prepared, respectively, in which the composition of the steel shell used was shown in Table 2 as a weight% of the total weight of the shell.

구분division CC TiO2 TiO 2 MnMn NiNi BB SiO2 SiO 2 Al2O3 Al 2 O 3 ZrO2 ZrO 2 Al2O3 + ZrO2 Al 2 O 3 + ZrO 2 CaOCaO MgOMgO Na2ONa 2 O K2OK 2 O CaO+ MgOCaO + MgO Na2O+K2ONa 2 O + K 2 O 수식KFormula K 발명예1Inventive Example 1 0.05 0.05 77 1.51.5 -- 0.00250.0025 0.20.2 0.10.1 -- 0.1 0.1 0.50.5 0.40.4 0.050.05 -- 0.90 0.90 0.05 0.05 1.081.08 발명예2Inventive Example 2 0.02 0.02 44 0.80.8 -- 0.00200.0020 0.10.1 0.40.4 0.20.2 0.6 0.6 0.080.08 -- 0.10.1 0.90.9 0.08 0.08 1.00 1.00 3.233.23 발명예3Inventive Example 3 0.05 0.05 7.57.5 1.81.8 -- 0.00430.0043 0.10.1 0.30.3 -- 0.3 0.3 0.050.05 1One 0.50.5 -- 1.05 1.05 0.50 0.50 2.302.30 발명예4Inventive Example 4 0.08 0.08 1010 1.21.2 0.20.2 0.00400.0040 0.60.6 0.60.6 0.60.6 1.2 1.2 1One 0.50.5 0.50.5 0.50.5 1.50 1.50 1.00 1.00 1.821.82 발명예5Inventive Example 5 0.10 0.10 3.53.5 1.81.8 2.72.7 0.00320.0032 0.10.1 0.40.4 0.30.3 0.7 0.7 0.50.5 0.20.2 0.90.9 0.10.1 0.70 0.70 1.00 1.00 4.004.00 발명예6Inventive Example 6 0.07 0.07 33 1.51.5 -- 0.00350.0035 0.80.8 -- 0.10.1 0.1 0.1 1One 0.40.4 0.50.5 0.10.1 1.40 1.40 0.60 0.60 2.522.52 비교예1Comparative Example 1 0.08 0.08 4.54.5 0.50.5 -- 0.00350.0035 -- 0.20.2 0.20.2 0.4 0.4 -- 0.50.5 -- 0.10.1 0.50 0.50 0.10 0.10 1.151.15 비교예2Comparative Example 2 0.07 0.07 3.53.5 0.80.8 1.01.0 0.00250.0025 0.0 50.0 5 0.050.05 0.050.05 0.1 0.1 0.030.03 0.050.05 -- 0.040.04 0.08 0.08 0.04 0.04 0.400.40 비교예3Comparative Example 3 0.05 0.05 77 1.81.8 -- 0.00350.0035 1.01.0 -- 0.40.4 0.4 0.4 -- 1One -- 0.20.2 1.00 1.00 0.20 0.20 0.790.79 비교예4Comparative Example 4 0.09 0.09 5.55.5 0.90.9 -- 0.00500.0050 0.20.2 -- 0.080.08 0.080.08 -- 0.90.9 0.50.5 -- 0.90 0.90 0.50 0.50 2.722.72 비교예5Comparative Example 5 0.10 0.10 3.53.5 1.01.0 -- 0.00380.0038 0.10.1 0.10.1 -- 0.1 0.1 0.040.04 0.020.02 0.40.4 0.30.3 0.06 0.06 0.70 0.70 3.623.62 비교예6Comparative Example 6 0.07 0.07 44 1.61.6 -- 0.00280.0028 0.10.1 0.050.05 0.050.05 0.1 0.1 1One 0.70.7 0.50.5 0.50.5 1.70 1.70 1.00 1.00 7.647.64 비교예7Comparative Example 7 0.07 0.07 10. 510. 5 1.01.0 -- 0.00240.0024 0.50.5 1One -- 1.0 1.0 0.350.35 0.150.15 0.950.95 0.150.15 0.50 0.50 1.10 1.10 1.591.59 비교예8Comparative Example 8 0.03 0.03 7.57.5 1.11.1 -- 0.00320.0032 0.20.2 0.20.2 0.20.2 0.4 0.4 0.50.5 0.080.08 0.090.09 0.58 0.58 0.09 0.09 0.700.70 비교예9Comparative Example 9 0.04 0.04 4.54.5 1.41.4 1.51.5 0.00350.0035 0.10.1 -- 0.10.1 0.1 0.1 0.50.5 0.60.6 0.30.3 0.40.4 1.10 1.10 0.70 0.70 4.754.75 비교예10Comparative Example 10 0.10 0.10 3.83.8 1.61.6 -- 0.00300.0030 0.10.1 0.050.05 0.050.05 0.1 0.1 0.90.9 0.50.5 0.50.5 0.50.5 1.40 1.40 1.00 1.00 7.367.36

단, 수식K :(CaO+MgO + 2.5(Na2O+K2O))/(SiO2 + 0.1TiO2 + 0.5(Al2O3+ZrO2))Formula K: (CaO + MgO + 2.5 (Na 2 O + K 2 O)) / (SiO 2 + 0.1TiO 2 + 0.5 (Al 2 O 3 + ZrO 2 ))

구분division CC SiSi Mn Mn PP SS FeFe 함량content 0.0250.025 0.00250.0025 0.210.21 0.0090.009 0.010.01 잔부Balance

상기와 같이 마련된 각각의 와이어를 이용하여 두께 40mm의 EH36 용접모재에 V형 개선 Butt용접을 실시하였으며, 그 구체적인 용접조건은 하기 표3과 같다.V-type improved Butt welding was performed on the EH36 welding base material having a thickness of 40 mm by using the wires prepared as described above, and the specific welding conditions are shown in Table 3 below.

모재Base material 루트갭(mm)Root gap (mm) 각도(도)Angle in degrees 적층Lamination 전류(A)Current (A) 전압(V)Voltage (V) 용접속도(cm/min)Welding speed (cm / min) 입열량(kJ/cm)Heat input amount (kJ / cm) EH36, 40mmtEH36, 40mmt 88 4040 14pass14pass 350A350 A 36v36v 19.519.5 38.738.7

또한, 상기와 같이 용접을 실시한 후, 각각의 와이어별 용접작업성 및 용접금속 이면 충경인성을 측정하여 하기 표 4에 나타내었다. In addition, after performing the welding as described above, the welding workability and weld metal back surface toughness toughness of each wire is measured and shown in Table 4 below.

용접금속 이면 충격인성은 -40℃에서 47Joules 이상인 경우를 발명의 범위로 판단하였다.The impact toughness of the weld metal back side was determined to be 47 Joules or more at -40 ° C as the scope of the invention.

구분division 용접작업성Welding workability 이면충격인성 (-40℃)(Joules)Back Impact Toughness (-40 ℃) (Joules) 발명예1Inventive Example 1 ○○ 8585 발명예2Inventive Example 2 ○○ 101101 발명예3Inventive Example 3 ⊙⊙ 9090 발명예4Inventive Example 4 ⊙⊙ 125125 발명예5Inventive Example 5 ○○ 130130 발명예6Inventive Example 6 ○○ 7575 비교예1Comparative Example 1 △△ 2828 비교예2Comparative Example 2 ×× 9595 비교예3Comparative Example 3 ○○ 4545 비교예4Comparative Example 4 △△ 7575 비교예5Comparative Example 5 △△ 3838 비교예6Comparative Example 6 ×× 9090 비교예7Comparative Example 7 ×× 4747 비교예8Comparative Example 8 ○○ 4040 비교예9Comparative Example 9 △△ 9595 비교예10Comparative Example 10 ×× 8585

( 단,　 ⊙: 우수,　 ○: 양호,　 △: 보통 이하,　 X: 불량 )(However, ⊙: Excellent, ○: Good, △: Normal or less, X: Poor)

상기 표4에 나타난 것처럼, 본 발명예 (1-6)에서는 대입열 고능률 용접시에도, 양호한 용접작업성을 나타내며, 용접금속 이면 충격인성도 우수함을 알 수 있다. As shown in Table 4, in the present invention (1-6), even when the high heat input high efficiency welding, it shows a good welding workability, it can be seen that the weld metal back surface impact toughness is also excellent.

이에 반하여 Mn이 본 발명 범위를 벗어나는 비교예 1은 용접금속 이면 충격인성이 크게 저하되어 적합치 않았다. 또한, SiO2함량이 본 발명범위를 벗어난 비교예 2 및 비교예 3의 경우는 용접작업성 혹은 용접금속 이면 충격인성에서 바람직한 결과를 얻을 수 없었으며, 비교예4의 경우는 Al2O3 및 ZrO2의 합이 본 발명범위를 벗어나 양호한 용접작업성을 얻을 수 없었다. On the contrary, Comparative Example 1 in which Mn deviates from the scope of the present invention is not suitable because the impact toughness of the weld metal back is greatly reduced. In addition, in the case of Comparative Example 2 and Comparative Example 3 in which the SiO 2 content was outside the scope of the present invention, desirable results were not obtained in weldability or impact toughness of the back surface of the weld metal, and in Comparative Example 4, Al 2 O 3 and The sum of ZrO 2 was outside the scope of the present invention and a good weldability was not obtained.

그리고, CaO+MgO의 함량이 본 발명범위 미만인 비교예 5는 충격인성이 만족스럽지 못하였고, 본 발명범위를 초과하는 비교예 6의 경우는 용접작업성이 보통 이하의 수준을 나타내었다. 또한, Na2O 및 K2O의 합이 본 발명범위를 벗어난 비교예 7의 경우, 용접작업성이 크게 저하되는 문제가 있었다.In addition, Comparative Example 5 in which the content of CaO + MgO is less than the scope of the present invention was not satisfactory in impact toughness, and in Comparative Example 6 exceeding the scope of the present invention, the welding workability showed a level below normal. In addition, in the case of Comparative Example 7 in which the sum of Na 2 O and K 2 O was outside the scope of the present invention, there was a problem in that weldability greatly decreased.

나아가, 각각의 성분범위는 본 발명범위를 만족하나, (CaO + MgO + 2.5(Na2O+K2O))/(SiO2 + 0.1TiO2 + 0.5(Al2O3+ZrO2))의 비가 본 발명범위를 벗어난 비교예 8,9,10의 경우는 충격인성 혹은 용접작업성 면에서 양호한 결과를 얻을 수 없었다.Furthermore, each component range satisfies the present invention, but (CaO + MgO + 2.5 (Na 2 O + K 2 O)) / (SiO 2 + 0.1 TiO 2 + 0.5 (Al 2 O 3 + ZrO 2 )) In the case of Comparative Examples 8, 9, and 10 whose ratio is outside the scope of the present invention, good results were not obtained in terms of impact toughness or weldability.

Claims (2)

와이어 전중량에 대한 중량%로, C:0.02~0.10%, TiO2:3~10%, Mn:0.7~2.0%, B:0.0010~0.0045%, SiO2:0.1~0.8%, (Al2O3+ ZrO2):0.1~1.2%, (CaO+MgO)：0.08~1.50%, (Na2O+K2O):0.05~1.00%를 포함하고, (CaO+MgO + 2.5(Na2O+K2O))/(SiO2 + 0.1TiO2 + 0.5(Al2O3+ZrO2))의 비가 1~4인 것을 특징으로 하는 가스실드 아크 용접용 티타니아계 플럭스 충전 와이어.% By weight of wire, C: 0.02 to 0.10%, TiO 2 : 3 to 10%, Mn: 0.7 to 2.0%, B: 0.0010 to 0.0045%, SiO 2 : 0.1 to 0.8%, (Al 2 O 3 + ZrO 2 ): 0.1 to 1.2%, (CaO + MgO): 0.08 to 1.50%, (Na 2 O + K 2 O): 0.05 to 1.00%, containing (CaO + MgO + 2.5 (Na 2 O) A titania-based flux filling wire for gas shield arc welding, wherein the ratio of + K 2 O)) / (SiO 2 + 0.1 TiO 2 + 0.5 (Al 2 O 3 + ZrO 2 )) is 1 to 4. 제 1항에 있어서 , 상기 와이어에는 Ni가 0.2~2.7% 추가로 포함되는 것을 특징으로 하는 가스실드 아크 용접용 티타니아계 플럭스 충전 와이어.The titania-based flux filling wire for gas shielded arc welding according to claim 1, wherein the wire further comprises 0.2 to 2.7% of Ni.
KR1020070138232A 2007-12-27 2007-12-27 Titania-based Flux Filling Wire for Gas Shield Arc Welding KR100909022B1 (en)

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CN107921589A (en) * 2015-08-28 2018-04-17 株式会社神户制钢所 Flux-cored wire for gas-shielded arc welding
CN109623193A (en) * 2018-12-26 2019-04-16 洛阳双瑞特种合金材料有限公司 Low-temperature steel seamless flux-cored wire with low hydrogen, high toughness and preparation method thereof

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JP3377271B2 (en) * 1993-12-10 2003-02-17 新日本製鐵株式会社 Flux-cored wire for gas shielded arc welding
KR100502571B1 (en) 2000-07-25 2005-07-22 현대종합금속 주식회사 Flux cored wire for co2 gas shielded arc welding
KR100532243B1 (en) 2001-12-17 2005-11-30 현대종합금속 주식회사 A gas shield arc welding flux cored wire
JP4531617B2 (en) 2005-04-07 2010-08-25 日鐵住金溶接工業株式会社 Flux-cored wire for gas shielded arc welding

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Publication number Priority date Publication date Assignee Title
CN107921589A (en) * 2015-08-28 2018-04-17 株式会社神户制钢所 Flux-cored wire for gas-shielded arc welding
CN107921589B (en) * 2015-08-28 2019-08-27 株式会社神户制钢所 Flux-cored wire for gas-shielded arc welding
CN109623193A (en) * 2018-12-26 2019-04-16 洛阳双瑞特种合金材料有限公司 Low-temperature steel seamless flux-cored wire with low hydrogen, high toughness and preparation method thereof
CN109623193B (en) * 2018-12-26 2021-02-09 中国船舶重工集团公司第七二五研究所 Low-hydrogen high-toughness seamless flux-cored wire for low-temperature steel and preparation method thereof

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