KR100340640B1 - Compound of flux for submerged arc welding - Google Patents
Compound of flux for submerged arc welding Download PDFInfo
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- KR100340640B1 KR100340640B1 KR1019970069251A KR19970069251A KR100340640B1 KR 100340640 B1 KR100340640 B1 KR 100340640B1 KR 1019970069251 A KR1019970069251 A KR 1019970069251A KR 19970069251 A KR19970069251 A KR 19970069251A KR 100340640 B1 KR100340640 B1 KR 100340640B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B23K35/362—Selection of compositions of fluxes
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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
- B23K35/22—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
- B23K35/3602—Carbonates, basic oxides or hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B23K35/3603—Halide salts
- B23K35/3605—Fluorides
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- 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
- B23K35/3608—Titania or titanates
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- 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
- B23K35/361—Alumina or aluminates
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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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
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Abstract
Description
본 발명은 서버머지드 아크(submergedarc)용접에 의해 육성용접하거나 맞대기 용접을 위한 산화물계 플럭스에 관한 것으로서, 보다 상세하게는 우수한 용접특성을 갖는 플럭스에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to oxide based fluxes for butt welding or butt welding by submerged arc welding, and more particularly to fluxes having excellent welding properties.
서버머지드 아크 용접은 용착금속의 정련성이 우수할 뿐만 아니라 자동 및 반자동 용접이 가능하기 때문에 산업 전반에 걸처서 여러 분야에 널리 적용되고 있는 우수한 용접 공법중의 하나이다. 플럭스는 용접시 용착금속의 정련특성, 슬래그 박리성 그리고, 개재물의 혼입등과 같은 용접성에 절대적인 영향을 미치는 중요한 용접재료이다. 특히, 슬래그 박리성은 용접작업성과 직결되는 특성으로서 슬래그 박리성이 나빠지면 생성된 슬래그를 제거하는데 많은 시간과 노력이 소모되어 작업효율을 저하시키게 된다. 또한, 고융점 슬래그는 슬래그가 용착금속으로부터 완전히 제거되지 않음으로써 연속적으로 이루어지는 용접작업으로 인한 용착금속 내부의 개재물 혼입이 용착금속의 물성을 저하시킨다.Submerged arc welding is one of the excellent welding methods that are widely applied in various fields throughout the industry because of the excellent refining of the weld metal and the possibility of automatic and semi-automatic welding. Flux is an important welding material that has an absolute effect on weldability such as refining characteristics of the deposited metal, slag peelability, and inclusions during welding. In particular, slag peelability is a property directly connected to welding workability, and when slag peelability is deteriorated, a lot of time and effort are spent to remove the generated slag, thereby reducing work efficiency. In addition, the high melting point slag is not completely removed from the weld metal, the inclusion of the inclusions in the weld metal due to the continuous welding operation deteriorates the properties of the weld metal.
지금까지 슬래그 박리성을 향상시키기 위한 산화물계 플럭스는 여러 가지 제안된 바 있으며, 그 대표적인 것으로 일본공개특허 (소)62-3469호, 일본공개특허(평) 2-151393 및 대한민국특허공보 96-412호를 예로 들 수 있다.Various oxide fluxes for improving slag peelability have been proposed so far, and representative examples thereof include Japanese Patent Application Laid-Open No. 62-3469, Japanese Patent Application Laid-Open No. 2-151393, and Korean Patent Application Publication No. 96-412 For example, call.
일본공개특허 공보(소)62-34695호에 제안된 플럭스는 Al2O3, ZrO2및 MgO의 함유량을 적절히 조절함으로써 플럭스의 응고온도와 점도를 높여 용접비드의 형상을 개선함과 동시에 슬래그 박리성 향상을 도모하고 있는 것이다. 그러나, 이 플럭스는 MgO와 Al2O3가 다량 함유되어 용착금속 내부로 개재물 혼입을 일으키는 단점이 있다. 슬래그의 혼입은 플럭스의 응고온도가 높은 경우에 일어나는 현상으로써 특히 Al2O3가 많은 경우에 주로 발생한다.The flux proposed in Japanese Patent Application Laid-Open No. 62-34695 improves the solidification temperature and viscosity of the flux by appropriately adjusting the content of Al 2 O 3 , ZrO 2 and MgO, thereby improving the shape of the weld bead and simultaneously slag peeling. It is trying to improve sex. However, this flux has a disadvantage of containing a large amount of MgO and Al 2 O 3 to cause inclusions into the deposited metal. Incorporation of slag is a phenomenon that occurs when the solidification temperature of the flux is high, especially when Al 2 O 3 is large.
일본공개특허(평)2-151393호에서는 플럭스의 조성과 연화온도를 검토하여 용착금속내의 개재물 혼입을 줄이고 플럭스 소모량을 감소시킬 수 있는 플럭스를 제시하고 있다. 그러나, 이 플럭스는 SiO2가 35%이상 함유되어 있기 때문에 용접시 포크마크와 같은 결함발생의 소지가 높고 비드외관이 나빠지는 문제점이 있다. 포크마크는 플럭스 용융시 발생하는 가스가 용착금속과 슬래그의 계면에 위치함으로써 생성된다.Japanese Patent Application Laid-Open No. Hei 2-151393 examines the composition and softening temperature of the flux and proposes a flux that can reduce the inclusion of inclusions in the deposited metal and reduce the flux consumption. However, since the flux contains more than 35% of SiO 2 , defects such as fork marks during welding are high and the appearance of beads deteriorates. The fork mark is generated by the gas generated at the melting of the flux located at the interface between the deposited metal and the slag.
대한민국 특허공보 96-412호에서는 TiO2화합물을 적절히 첨가함으로써 슬래그 혼입이나 포크마크를 제거할 수 있는 플러스를 제안하고 있다. 그러나, 이 플럭스는 용접비드 표면에 심한 산화층을 형성시키는 단점이 있다.Korean Patent Publication No. 96-412 proposes a plus that can remove slag incorporation or fork marks by appropriately adding a TiO 2 compound. However, this flux has the disadvantage of forming a strong oxide layer on the weld bead surface.
이에, 본 발명자들은 상기의 문제를 해결하기 위하여 여러 가지의 플럭스를 제조하여 다양한 용접특성을 한 결과, 플럭스의 제반특성을 만족하는 플럭스를 개발하고, 이를 제안하는 바이다.In order to solve the above problems, the present inventors have produced various fluxes, and as a result, have developed a flux that satisfies the general characteristics of the flux, and proposes the flux.
본 발명은 개재물 혼입이 없고, 비드외관 및 슬래그 박리성이 우수하며, 표면산화가 안 일어나는 고강도 내열 스테인레스강의 서버머지드 아크 용접용 플럭스를 제공하는데, 그 목적이 있다.An object of the present invention is to provide a flux for welding a server-merged arc of high-strength heat-resistant stainless steel that is free from inclusions, has excellent bead appearance and slag peelability, and does not have surface oxidation.
도 1은 비교재 및 발명재에 있어서 용접비드 외관 및 표면산화 상태를 보여주는 저배율 광학현미경 사진으로,1 is a low magnification optical micrograph showing the appearance of the weld bead and the surface oxidation in the comparative material and the invention,
도1(a)는 발명재의 용접비드 표면이고,Figure 1 (a) is a weld bead surface of the invention material,
도1(b)는 비교재의 용접비드 표면이다.Figure 1 (b) is the weld bead surface of the comparative material.
상기 목적을 달성하기 위한 본 발명 플럭스는, 중량비로 SiO2:13-20%, CaF2:16-21.5%, MgO:38.5-48%, Al2O3:16-22% 및 (Na2O+K2O+MnO+FeO):0.5-6.0%로 구성된다.The flux of the present invention for achieving the above object is SiO 2 : 13-20%, CaF 2 : 16-21.5%, MgO: 38.5-48%, Al 2 O 3 : 16-22% and (Na 2 O by weight) + K 2 O + MnO + FeO): composed of 0.5-6.0%.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
플럭스 성분중 SiO2는 슬래그 형성재의 하나로서 성분함량에 의존하여 슬래그의 염기도에 영향을 미치는 산성을 띠는 산화물로써 13-20%로 제한한다. 특히, SiO2는 슬래그의 유동성을 제어하여 용융금속을 보다 효율적으로 에워싸는 기능을 수행하며 결과적으로 용착금속 표면과 형상에 결정적인 역할을 한다. SiO2가 13% 미만인경우에는 응고온도의 상승으로 점성이 낮아지기 때문에 슬래그의 유동성을 증가시켜 용접비드의 표면을 거칠게 하는 단점이 있다. 만일 20%를 초과하면 슬래그의 유동성이 나빠져 용착금속 표면에 포크마크와 같은 결함들을 형성시키게 된다.Among the flux components, SiO 2 is one of the slag forming materials and is limited to 13-20% as an acidic oxide which affects the basicity of slag depending on the component content. In particular, SiO 2 performs the function of more efficiently enclosing molten metal by controlling the flowability of the slag and consequently plays a decisive role on the deposited metal surface and shape. If the SiO 2 is less than 13%, since the viscosity decreases due to the increase of the solidification temperature, there is a disadvantage in that the slag fluidity is increased to roughen the surface of the weld bead. If it exceeds 20%, the slag fluidity deteriorates, causing defects such as fork marks on the deposited metal surface.
염기성 성분인 CaF2는 주로 가스형성제로서 용융금 속의 표면을 보호성 분위기를 형성하여 차폐하는 기능을 담당하며 본 발명에서는 16-21.5%로 그 함유량을 한정한다. CaF2의 함량이 16%보다 낮으면 용융금속을 차폐하는 효과가 부족하며 응고온도와 유동성이 증가하여 용접비드의 외관이 나빠진다. 반면에, 그 함량이 21.5%를 초과하면 가스의 발생량이 급격히 증가하여 아크의 안정성을 저하시킬 뿐만 아니라 피트(pit)와 블로우 홀(blow hole)등과 같은 가스형성으로 인한 결함을 다량 발생시키는 문제점이 있다.CaF 2, which is a basic component, is mainly a gas former, and serves to shield the surface of the molten metal by forming a protective atmosphere. In the present invention, the content is limited to 16-21.5%. If the CaF 2 content is lower than 16%, the shielding effect of the molten metal is insufficient and the solidification temperature and fluidity are increased, thereby deteriorating the appearance of the weld bead. On the other hand, if the content exceeds 21.5%, the amount of gas is rapidly increased to reduce the stability of the arc, as well as to generate a large amount of defects due to gas formation such as pit and blow hole. have.
MgO는 응고온도가 상대적으로 높은 화합물로서 플럭스의 용융온도를 제어하여 적정 점도를 유지하기 위해 이용될 수 있다. 특히, MgO는 염기성 성분으로서 용착금속의 산소를 감소시키는 역할을 담당하며 그 함유량을 38.5-48%로 제한한다. 이 화합물의 함유량이 38.5% 미만으로 감소하면 점도가 높아져 슬래그 박리성이 나빠지게 되어 작업효율이나 용접비드 외관이 거칠게 된다. 또한 48%를 초과하게 되면 슬래그의 용융온도가 너무 높아져 용접비드폭이 좁아질 뿐만 아니라 용착금속내에 개재물 혼입이 조장되는 단점이 있다.MgO is a compound having a relatively high solidification temperature and can be used to control the melting temperature of the flux to maintain an appropriate viscosity. In particular, MgO serves as a basic component to reduce the oxygen of the deposited metal and limits its content to 38.5-48%. When the content of this compound decreases below 38.5%, the viscosity becomes high, resulting in poor slag peelability, resulting in a rough working efficiency or a rough appearance of the weld bead. In addition, if it exceeds 48%, the melting temperature of the slag is too high to narrow the weld bead width, there is a disadvantage in that the inclusion of inclusions in the weld metal is encouraged.
Al2O3는 MgO와 비슷한 기능을 담다하지만, 약산성 성분으로서 플럭스의 염기도에 영향을 미치는 화합물이며 16-22%로 그 함유량을 한정한다. 그 함유량이 16% 미만인경우에는 슬래그 용융온도가 상대적으로 낮아 점성이 증가하기 때문에 슬래그 박리성을 저하시키게 된다. 만일 함유량이 22%를 초과하면 슬래그의 온도가 높아져 용접비드 외관을 나쁘게 하고 서버머지드 아크 용접과 같이 고속용접시에 용착금속내로 슬래그 혼입을 초래하게 된다.Al 2 O 3 has a similar function to MgO, but is a weakly acidic component that affects the basicity of the flux and limits its content to 16-22%. If the content is less than 16%, the slag melting temperature is relatively low and the viscosity increases, thereby reducing slag peelability. If the content is more than 22%, the slag temperature is increased to deteriorate the appearance of the weld bead and cause the slag to be mixed into the weld metal during the high speed welding such as the submerged arc welding.
상기의 Na2O3, K2O, MnO, FeO는 플럭스 제조시 구성분말들을 서로 응집시키기 위하여 첨가되는 바인더나 SiO2, CaF2, MgO, Al2O3와 같은 원료분말에 함유된 불순물로써 본 발명의 플럭스 특성에는 큰 영향을 미치지 않는 성분이다. 그러나 바인더 함량이 0.5%이하인 경우에는 점결력이 너무 약해 적절한 입도를 갖는 플럭스 제조가 어렵다. 그리고 Na2O3, K2O, MnO, FeO함량이 6%이상으로 증가되는 과다한 바인더 첨가시에는 아크를 불안정하게 할 뿐만 아니라 응집분말의 유동성이 증가하여 정상적인 응집작업을 어렵게 한다.Na 2 O 3 , K 2 O, MnO, and FeO are impurities added to binders or raw materials such as SiO 2 , CaF 2 , MgO, and Al 2 O 3 that are added to agglomerate the component powders during flux production. It is a component which does not have a big influence on the flux characteristic of this invention. However, when the binder content is less than 0.5%, the caking force is too weak to produce a flux having an appropriate particle size. In addition, when excessive binder addition of Na 2 O 3 , K 2 O, MnO, and FeO content is increased to 6% or more, not only the arc is unstable, but also the fluidity of the agglomerated powder is increased, which makes normal coagulation work difficult.
그리고 본 발명의 플럭스 입도는 입자의 90%이상이 0.3-1.0mm의 범위를 갖는 것이 보다 바람직하다. 그 이유는 0.3mm보다 작은 입자나 1.0mm보다 큰 입자가 10%이상이 되면 아크 발생이 불안정해 지므로 최적의 용접성을 나타내지 못하기 때문이다.And it is more preferable that 90% or more of particle | grains of the flux particle size of this invention have the range of 0.3-1.0 mm. The reason is that when the particle size smaller than 0.3mm or particle size larger than 1.0mm becomes 10% or more, the arc generation becomes unstable and thus does not exhibit optimal weldability.
이러한 본 발명의 플럭스는 서버머지드 아크용접에 의해 다양한 금속의 용접에 이용될 수 있으며, 특히, 고강도 내열용 스테인레스강의 육성용접에 유용하다.The flux of the present invention can be used for welding various metals by submerged arc welding, and is particularly useful for the growth welding of high strength heat resistant stainless steel.
이하, 본 발명을 실시예를 통하여 구체적으로 설명한다.Hereinafter, the present invention will be described in detail through examples.
[실시예 1]Example 1
본 발명에서는 서버머지드 아크 용접에 적합한 플럭스의 용접특성을 평가하기 위하여 SiO2, Al2O3, MgO, CaF2화합물을 기본구성성분으로 하고, 이를 적절히 조절함으로써 제조하였다. 원료분말은 원하는 조성으로 혼합한 후에 shake mixer에서 회전속도 30-150rpm으로 10분이상 건식혼합하였다. 혼합분말은 적정량의 규산소다 용액을 첨가하여 응집시켰다. 그리고 플럭스용 혼합분말에 균일한 조성과 강도를 부여하기 위하여 열처리로에서 1050℃, 10분 이상 소결되었다. 소결처리된 플럭스는 분쇄기에서 파쇄되어 대략 0.3-1.0mm의 입도범위를 갖도록 조절되었다. 본 발명에 사용된 플럭스의 화학조성은 표 1에 나타내었다.In the present invention, in order to evaluate the welding properties of the flux suitable for the server-merged arc welding, SiO 2 , Al 2 O 3 , MgO, CaF 2 compound was prepared by adjusting the appropriate components as a basic component. The raw powder was mixed to a desired composition and then dry mixed at a rotation speed of 30-150 rpm for at least 10 minutes in a shake mixer. The mixed powder was agglomerated by adding an appropriate amount of sodium silicate solution. And in order to give uniform composition and strength to the mixed powder for flux, it was sintered at 1050 degreeC for 10 minutes or more. The sintered flux was crushed in the mill and adjusted to have a particle size range of approximately 0.3-1.0 mm. The chemical composition of the flux used in the present invention is shown in Table 1.
용접성 평가는 제조된 플럭스를 이용하여 직경 450mm, 두께 70mm의 SCM440강 표면위에 표 1에 표시한 여러 가지 플럭스재료를 서버머지드 아크 용접법을 이용하여 Cr:13%, Ni:2%, W:1%, Mo:0.5%, Nb:0.3%, V:0.3%, Cu:0.4%, C:0.13% 나머지 Fe로 조성되는 마르텐사이트계 스테인레스강을 육성용접하였다. 용접조건은 MCW(metal cored wire)를 사용하여 570-590A, 26-34V로 작업하였다. 용접성은 슬래그 박리성과 용접비드의 형태 및 표면상태를 정성적으로 평가하였으며, 이때의 아크안정성을 측정하여 평가하였다. 그리고 용착금속의 단면을 조사하여 슬래그 혼입여부와 내부결함을 조사하였다.Weldability evaluation was performed on the surface of SCM440 steel with 450mm diameter and 70mm thickness by using the manufactured flux. %, Mo: 0.5%, Nb: 0.3%, V: 0.3%, Cu: 0.4%, C: 0.13% Martensitic stainless steel composed of the remaining Fe was grown and welded. Welding conditions were 570-590A, 26-34V using MCW (metal cored wire). Weldability was evaluated qualitatively by slag peelability and weld bead morphology and surface condition. In addition, the cross section of the weld metal was examined to determine whether the slag was mixed and the internal defects.
상기표 2에 나타난 바와같이, 비교재의 표면이 심하게 산화된 상태를 보인다(도 1(b)). 반면에 발명재(1,2)의 플럭스는 아크 안정성, 슬래그 박리성 그리고 용접비드 외관이 우수할 뿐만 아니라 표면도 용착금속의 광택을 그대로 나타내는 우수한 용접특성을 나타내고 있다(도1(a))As shown in Table 2, the surface of the comparative material shows a severely oxidized state (Fig. 1 (b)). On the other hand, the flux of the inventive materials (1, 2) is not only excellent in arc stability, slag peelability and appearance of weld beads, but also exhibits excellent welding characteristics that show the gloss of the deposited metal as it is (Fig. 1 (a)).
상술한 바와같이, 본 발명의 플럭스는 플럭스의 제반 특성을 만족하며, 특히, 육성용접용 와이어 및 스트립으로 육성되는 플럭스 재료로서 유용하다.As mentioned above, the flux of the present invention satisfies all the characteristics of the flux, and is particularly useful as a flux material to be grown with a welding weld wire and strip.
Claims (2)
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| KR1019970069251A KR100340640B1 (en) | 1997-12-16 | 1997-12-16 | Compound of flux for submerged arc welding |
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| KR1019970069251A KR100340640B1 (en) | 1997-12-16 | 1997-12-16 | Compound of flux for submerged arc welding |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59150693A (en) * | 1983-02-16 | 1984-08-28 | Kobe Steel Ltd | Flux for submerged arc welding |
| KR930002033A (en) * | 1991-07-05 | 1993-02-22 | 원본미기재 | Submerged welding flux and manufacturing method of the flux |
| KR950017059A (en) * | 1993-12-27 | 1995-07-20 | 조말수 | Flux for Submerged Arc Welding |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59150693A (en) * | 1983-02-16 | 1984-08-28 | Kobe Steel Ltd | Flux for submerged arc welding |
| KR930002033A (en) * | 1991-07-05 | 1993-02-22 | 원본미기재 | Submerged welding flux and manufacturing method of the flux |
| KR950017059A (en) * | 1993-12-27 | 1995-07-20 | 조말수 | Flux for Submerged Arc Welding |
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