KR100421733B1 - Carbon dioxide gas arc welding rod wire manufacturing method - Google Patents

Carbon dioxide gas arc welding rod wire manufacturing method Download PDF

Info

Publication number
KR100421733B1
KR100421733B1 KR10-1998-0058293A KR19980058293A KR100421733B1 KR 100421733 B1 KR100421733 B1 KR 100421733B1 KR 19980058293 A KR19980058293 A KR 19980058293A KR 100421733 B1 KR100421733 B1 KR 100421733B1
Authority
KR
South Korea
Prior art keywords
rolling
carbon dioxide
arc welding
wire rod
wire
Prior art date
Application number
KR10-1998-0058293A
Other languages
Korean (ko)
Other versions
KR20000042185A (en
Inventor
최상우
이유완
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR10-1998-0058293A priority Critical patent/KR100421733B1/en
Publication of KR20000042185A publication Critical patent/KR20000042185A/en
Application granted granted Critical
Publication of KR100421733B1 publication Critical patent/KR100421733B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

본 발명은 압연중에 중간수냉설비를 설치하여 압연중 온도를 저하시켜 냉각시 저온조직 및 TiC 석출물을 최소화하여 용접봉 선재의 인장강도 상승 및 편차증가를 억제할 수 있는 탄산가스 아크 용접봉용 선재제조방법을 제공하는 데 그 목적이 있다.The present invention provides a method for manufacturing a wire rod for carbon dioxide arc welding rod that can suppress the increase in tensile strength and the increase of the deviation of the electrode wire rod by minimizing the low-temperature structure and TiC precipitate during cooling by lowering the temperature during rolling by installing an intermediate water cooling facility during rolling. The purpose is to provide.

위와 같은 목적을 달성하기 위한 본 발명은, 강편재를 재가열하여 추출하는 단계와, 조압연와 중간조압연 및 사상압연을 거쳐 열간압연하는 단계와, 열간압연된 선재를 냉각설비를 거친 후 감는 단계를 포함하는 탄산가스 아크 용접봉용 선재제조방법에 있어서, 중간조압연 및 사상압연의 사이에 중간수냉설비를 설치하여 선재의 사상압연열 출구온도가 1050℃이하가 되도록 강냉시킴으로써 저온조직 및 TiC 석출물을 최소화하여 인장강도 상승 및 표준편차증가를 억제시킨다. 또한, 본 발명은 선재의 사상압연열 입구온도를 900 - 930℃로 하는 것이 양호하다.The present invention for achieving the above object, the step of reheating and extracting the steel piece, the step of hot rolling through rough rolling and intermediate rough rolling and finishing rolling, and the step of winding the hot rolled wire rod after the cooling facility In the method of manufacturing a wire rod for carbon dioxide arc welding rod, comprising an intermediate water cooling system between intermediate rough rolling and filament rolling, the cold rolling exit temperature of the wire is cooled to 1050 ° C. or lower, thereby minimizing low temperature structure and TiC precipitates. This increases the tensile strength and increases the standard deviation. In the present invention, it is preferable that the filamentary rolling inlet temperature of the wire rod is 900 to 930 ° C.

Description

탄산가스 아크 용접봉용 선재제조방법Wire Rod Manufacturing Method for Carbon Dioxide Arc Welding Rod

본 발명은 탄산가스 아크 용접봉용 선재제조방법에 관한 것이며, 특히, 냉각시 석출물의 조대화 및 저온조직 저감을 통하여 인장강도 및 편차 상승을 최소화하여 탄산가스 아크용접시 용접와이어의 일정한 송급으로 용접아크의 안정성을 높일 수 있는 탄산가스 아크 용접봉용 선재제조방법에 관한 것이다.The present invention relates to a wire rod manufacturing method for a carbon dioxide arc welding rod, in particular, by minimizing the increase in tensile strength and deviation through the coarsening of precipitates and the reduction of low-temperature structure during cooling, the welding arc by a constant supply of the welding wire during carbon dioxide arc welding It relates to a wire rod manufacturing method for a carbon dioxide arc welding rod that can increase the stability of the.

통상, 탄산가스 아크 용접봉용 선재는 직경 5.5mm의 선재로부터 직경 0.8 ∼ 1.2mm의 소선까지 중간 열처리 공정 없이 냉간에서 신선가공하는 공정을 적용하고 있으므로 냉각공정에서의 미세한 제어가 요구된다. 이에 따라 냉각조건이 대략적으로 설정된 상태이나, 아직까지도 인장강도의 상승 및 편차증가 등의 재질편차가 심각한 상태이다. 즉, 도 3에 보이듯이, 용접봉 선재의 국부적인 인장강도 편차가 과다하게 발생함으로 인하여 완제품 가공 후에도 현격한 편차를 보이게 된다.In general, the carbon dioxide arc welding rod wire is a cold wire processing process without an intermediate heat treatment process from a wire of 5.5 mm in diameter to an element wire of 0.8 to 1.2 mm in diameter, so fine control is required in the cooling process. As a result, the cooling conditions are approximately set, but there are still serious material deviations such as an increase in tensile strength and an increase in deviation. That is, as shown in Figure 3, due to the excessive local tensile strength deviation of the electrode wire rods will show a sharp deviation even after processing the finished product.

예를 들어, 6mm두께 이상의 후판 강재를 용접할 때 사용되는 탄산가스 아크 용접봉용 선재로는 0.15 ∼ 0.25%의 타이타늄(Ti)을 첨가한 0.2% 이하의 탄소를 함유한 저탄소강선재가 사용된다. 이런 선재에 타이타늄을 첨가하는 이유는, 용접시의 입열증가와 용착금속의 강도 및 인성저하를 방지하고, 고전류역에서 용접아크의 안정성 등을 향상시키기 위해서다. 그러나, 저탄소강에 타이타늄을 첨가하면, 열간압연후 선재냉각시 선재의 인장강도를 상승시키는 동시에 편차도 증가시켜, 선재의 신선가공성을 열악하게 만들뿐만 아니라 탄산가스 아크용접시 용접아크의 불안정 및 단락으로 최종 용접품질이 저하시킨다.For example, a low carbon steel wire containing 0.2% or less of carbon containing 0.15 to 0.25% of titanium (Ti) is used as the wire for carbon dioxide arc welding rods used when welding thick steel plates having a thickness of 6 mm or more. The reason why titanium is added to such wire rod is to prevent the increase in heat input during welding, the decrease in the strength and toughness of the weld metal, and the stability of the welding arc at a high current range. However, the addition of titanium to low carbon steels increases the tensile strength of wires during wire rod cooling after hot rolling and increases the deviations, resulting in poor wire freshness as well as instability and short circuit welding arcs during carbon arc welding. This reduces the final welding quality.

이런 특징을 갖는 타이타늄이 첨가된 탄산가스 아크 용접봉용 선재를 제조하기 위하여 종래에는 도 1에 도시된 바와 같은 제조방법을 사용하고 있다.In order to manufacture a carbon dioxide arc welding electrode wire with titanium added with such characteristics, a conventional manufacturing method as shown in FIG. 1 is used.

도 1에 도시된 바와 같이, 종래기술의 탄산가스 아크 용접봉용 선재는 강편재를 재가열하여 1010℃에서 추출한 후, 29개의 연속열간압연기를 통과하는 조압연와 중간조압연과정 및, 사상압연과정을 거쳐 최종 5.5mm의 직경을 갖는 선재로 만들어진다. 그런 다음, 수냉대, 권취기 및 스텔모아(Stelmor) 냉각설비를 거쳐 800 ∼ 900℃에서 링(ring)형태로 권취되어 스텔모아 컨베이어 롤러상으로 이송되고 서냉되는 일련의 과정을 거쳐 최종 선재제품이 제조된다.As shown in FIG. 1, the wire rod for carbon dioxide arc welding rod of the prior art is reheated and extracted at 1010 ° C., followed by rough rolling and intermediate rough rolling and passing through 29 continuous hot rolling mills, and finishing rolling. It is made of wire rod with a final diameter of 5.5 mm. Then, the final wire product is passed through a series of processes that are wound in a ring form at 800-900 ° C. through a water chiller, a winder, and a Stelmor cooling system, transferred onto a Stelmore conveyor roller, and slowly cooled. Are manufactured.

그러나, 종래방법에 의해 제조된 탄산가스 아크 용접봉용 선재는 도 3에 도시된 바와 같이 평균인장강도는 높고 표준편차가 심해 용접아크가 불안정하다는 단점이 있다.However, the carbon dioxide arc welding rod wire produced by the conventional method has a disadvantage that the welding arc is unstable because the average tensile strength is high and the standard deviation is severe as shown in FIG.

따라서, 본 발명은 앞서 설명한 바와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 압연중에 중간수냉설비를 설치하여 압연중 온도를 저하시켜 냉각시 저온조직 및 TiC 석출물을 최소화하여 용접봉 선재의 인장강도 상승 및 편차증가를 억제할 수 있는 탄산가스 아크 용접봉용 선재제조방법을 제공하는 데 그 목적이 있다.Therefore, the present invention has been made in order to solve the problems of the prior art as described above, by installing an intermediate water cooling facility during rolling to lower the temperature during rolling to minimize the low-temperature structure and TiC precipitates during cooling tensile strength of the welding rod wire An object of the present invention is to provide a wire rod manufacturing method for a carbon dioxide arc welding rod that can suppress an increase in an increase and a deviation.

도 1은 종래기술에 따른 탄산가스 아크 용접봉용 선재제조방법을 설명하기 위한 공정도이고,1 is a process chart for explaining the carbon dioxide arc welding rod manufacturing method according to the prior art,

도 2는 본 발명의 한 실시예에 따른 탄산가스 아크 용접봉용 선재제조방법을 설명하기 위한 공정도이며,Figure 2 is a process diagram for explaining a carbon dioxide arc welding rod manufacturing method according to an embodiment of the present invention,

도 3은 본 발명방법에 의해 제조된 선재와 종래방법에 의해 제조된 선재를 비교한 도표.3 is a diagram comparing the wire produced by the method of the present invention and the wire produced by the conventional method.

앞서 설명한 바와 같은 목적을 달성하기 위한 본 발명은, 강편재를 재가열하여 추출하는 단계와, 조압연와 중간조압연 및 사상압연을 거쳐 열간압연하는 단계와, 열간압연된 선재를 냉각설비를 거친 후 감는 단계를 포함하는 탄산가스 아크 용접봉용 선재제조방법에 있어서, 상기 중간조압연 및 사상압연의 사이에 중간수냉설비를 설치하여 선재의 사상압연열 출구온도가 1050℃이하가 되도록 강냉시킴으로써 저온조직 및 TiC 석출물을 최소화하여 인장강도 상승 및 표준편차증가를 억제시킨다.The present invention for achieving the object as described above, the step of reheating and extracting the steel piece, the step of hot rolling through rough rolling, intermediate rough rolling and finishing rolling, and winding the hot rolled wire rod after the cooling facility In the wire rod manufacturing method for a carbon dioxide arc arc welding rod comprising a step, by installing an intermediate water cooling facility between the intermediate rough rolling and finishing rolling, the cold rolling and the exit temperature of the wire rod is cooled to 1050 ℃ or less, the low-temperature structure and TiC Minimize the precipitate to suppress the increase in tensile strength and increase the standard deviation.

또한, 본 발명은 상기 선재의 사상압연열 입구온도를 900 - 930℃로 하는 것이 양호하다.In the present invention, it is preferable that the filamentary rolling inlet temperature of the wire rod is 900 to 930 ° C.

예를 들어, 6mm두께 이상의 후판 강재를 용접할 때 사용되는 탄산가스 아크 용접봉용 선재로는 0.15 ∼ 0.25%의 타이타늄(Ti)을 첨가한 0.2% 이하의 탄소를 함유한 저탄소강선재가 사용된다. 이런 아크 용접봉용 선재의 타이타늄의 첨가로 타이타늄 탄화물(이하, "TiC"라 함)이 기지조직에 미세하게 석출된다. 그리고, 압연중의 TiC 석출로 인하여 페라이트내에서의 TiC 석출물에 대한 핵생성 자리가 되어 페라이트내에서의 석출을 가속화시킨다. 이 때, 석출구동력은 고용온도와 유지온도의 차이에 비례하여 증가한다. 그리고, 미량합금원소(Ti, Nb,..) 첨가강의 오스테나이트에서 탄질화물의 석출은 확산제어 핵생성과 성장에 의해 발생한다고 알려져 있다.For example, a low carbon steel wire containing 0.2% or less of carbon containing 0.15 to 0.25% of titanium (Ti) is used as the wire for carbon dioxide arc welding rods used when welding thick steel plates having a thickness of 6 mm or more. Titanium carbide (hereinafter referred to as " TiC ") is finely precipitated in the matrix structure by the addition of titanium to the arc welding rod wire. And, due to the precipitation of TiC during rolling, it becomes a nucleation site for the TiC precipitate in the ferrite and accelerates the precipitation in the ferrite. At this time, the precipitation driving force increases in proportion to the difference between the solid solution temperature and the holding temperature. In addition, precipitation of carbonitride in austenite of trace alloy element (Ti, Nb, ..) addition steel is known to occur due to diffusion control nucleation and growth.

이런 미세한 TiC 석출물은 오스테나이트의 고온영역에서 석출이 시작되는 데, 고용되지 않은 탄화물이 오스테나이트 입자크기를 압연중에 조정하게 되고, 또한 탄화물 석출이 쉽게 일어날 수 있는 우선위치가 된다. 그리고, 고온의 오스테나이트 영역에서 석출된 탄화물은 조대해지므로 석출강화효과를 약화시키고, 탄질화물은 온도가 높아질 경우 조대화된다. 이러한 탄질화물의 조대화 속도는 아래의 수학식 1과 같이 정의된다.Such fine TiC precipitates start to precipitate in the high temperature region of austenite, and the unsolubilized carbide adjusts the austenite grain size during rolling, and also becomes a priority position where carbide precipitation can easily occur. In addition, the carbide precipitated in the high temperature austenite region becomes coarse, thus weakening the precipitation strengthening effect, and the carbonitride coarsens when the temperature is increased. The coarsening rate of such carbonitride is defined by Equation 1 below.

[수학식 1][Equation 1]

r0: 초기 석출물의 반경, D : 확산계수, T : 온도, [M] : 기지에 용해된 석출물 원자의 농도, Vm : 탄질화물의 몰체적(molar volume).r 0 : radius of initial precipitate, D: diffusion coefficient, T: temperature, [M]: concentration of precipitate atoms dissolved in known matrix, Vm: molar volume of carbonitride.

수학식 1에서 알 수 있듯이, 탄질화물의 조대화는 탄질화물의 입계에너지, 확산계수, 온도, 시간, 기지에 용해된 석출물 원자의 농도에 크게 지배되는데, 그중에서도 기지에 용해된 탄질화물 원자의 농도가 조대화속도에 가장 큰 영향을 미친다고 알려져 있다. 또한, 냉각속도가 감소할수록 TiC 의 성장속도는 증가하여, 타이타늄 첨가의 영향은 감소하게 된다.As can be seen from Equation 1, the coarsening of carbonitrides is largely governed by the grain boundary energy, diffusion coefficient, temperature, time and concentration of precipitate atoms dissolved in the matrix, among which the concentration of carbonitride atoms dissolved in the matrix Is known to have the greatest effect on the rate of coarsening. In addition, as the cooling rate decreases, the growth rate of TiC increases, and the influence of titanium addition decreases.

이에 열간압연중에 압연온도를 저하시켜 오스테나이트의 결정립성장을 최대로 억제하고, TiC 석출물의 석출구동력을 최대로 하여 압연중에 석출시키는 동시에 조대화를 동시에 확보한다. 따라서, 냉각중에 스텔모아 냉각설비의 온도차이로 인한 본 제품의 재질편차의 억제를 최소화할 수 있다.As a result, the rolling temperature is reduced during hot rolling to suppress grain growth of austenite to the maximum, and the precipitation driving force of the TiC precipitate is maximized to precipitate during rolling and to secure coarsening at the same time. Therefore, it is possible to minimize the suppression of the material deviation of the product due to the temperature difference of the Stelmore cooling equipment during cooling.

아래에서, 본 발명에 따른 탄산가스 아크 용접봉용 선재제조방법의 양호한 실시예를 첨부한 도면을 참조로 하여 상세히 설명하겠다.Hereinafter, with reference to the accompanying drawings a preferred embodiment of the wire rod manufacturing method for a carbon dioxide arc welding electrode according to the present invention will be described in detail.

도면에서, 도 2는 본 발명의 한 실시예에 따른 탄산가스 아크 용접봉용 선재제조방법을 설명하기 위한 공정도이고, 도 3은 본 발명방법에 의해 제조된 선재와 종래방법에 의해 제조된 선재를 비교한 도표이다.In the drawings, Figure 2 is a process chart for explaining a carbon dioxide arc arc welding rod manufacturing method according to an embodiment of the present invention, Figure 3 is a wire rod prepared by the method of the present invention and a wire rod prepared by a conventional method It is a chart.

도 2에 도시된 바와 같이, 본 발명의 탄산가스 아크 용접봉용 선재는 강편재를 재가열하여 1010℃에서 추출한 후, 29개의 연속열간압연기를 통과하는 조압연 및 중간조압연과정과, 중간수냉설비에 의한 수냉과정 및 사상압연과정을 거쳐 최종 5.5mm의 직경을 갖는 선재로 만들어진다. 그런 다음, 수냉대, 권취기 및 스텔모아(Stelmor) 냉각설비를 거쳐 800 ∼ 900℃에서 링(ring)형태로 권취되어 스텔모아 컨베이어 롤러상으로 이송되고 서냉되는 일련의 과정을 거쳐 최종 선재제품이 제조된다. 여기에서, 중간수냉설비는 이송되는 판재를 360 °전면에서 다수의 노즐을 통해 물분사하여 표면을 강냉시키는 장치이다.As shown in FIG. 2, the carbon dioxide arc welding rod wire of the present invention is reheated and extracted at 1010 ℃ steel strip material, after the crude rolling and intermediate rough rolling process passing through 29 continuous hot rolling mill, and intermediate water cooling equipment It is made of wire rod having final diameter of 5.5mm through water cooling process and finishing rolling process. Then, the final wire product is passed through a series of processes that are wound in a ring form at 800-900 ° C. through a water chiller, a winder, and a Stelmor cooling system, transferred onto a Stelmore conveyor roller, and slowly cooled. Are manufactured. Here, the intermediate water cooling system is a device for cooling the surface by spraying water through a plurality of nozzles on the front plate 360 ° conveyed.

즉, 본 발명은 도 2에서 처럼 종래의 선재열간압연중에 중간조압연과 사상압연열의 입측 사이에 중간수냉설비를 설치하여 압연중 소재의 온도를 저하 또는 제어하는 방법이다. 즉, 선재연속압연중인 소재를 중간수냉설비를 이용하여 소재의 표면을 강냉함으로써 사상압연열 입측온도를 제어하고 최종사상압연열 출측온도를 조정하는 내용이다.That is, the present invention is a method for lowering or controlling the temperature of the raw material during rolling by installing an intermediate water cooling facility between the entrance of the intermediate rough rolling and the finishing rolling during the conventional wire hot rolling as shown in FIG. That is, the cold rolling material is cooled by using an intermediate water-cooling system to control the filament heat input temperature and to adjust the final quench heat exit temperature.

종래의 압연종료온도, 즉 사상압연열 출구온도는 1100 - 1150℃ 이나, 중간수냉설비를 이용하면 970 - 1050℃가 된다. 즉, 본 발명에서는 사상압연열 출구온도가 1050℃이하가 되어야 하는 데, 이는 중간수냉설비 후단 및 사상압연중에 TiC 석출물이 다량 석출될 수 있는 온도차를 확보할 수 있기 때문이다.Conventional rolling end temperature, that is, the finishing rolling exit temperature is 1100-1150 ℃, if using an intermediate water cooling equipment is 970-1050 ℃. That is, in the present invention, the finishing rolling exit temperature should be 1050 ° C. or less, since it is possible to secure a temperature difference in which a large amount of TiC precipitates can be deposited during the rear end of the intermediate water cooling system and during finishing rolling.

그리고, 사상압연열 입구온도는 900 - 930℃가 가장 양호하다. 즉, 냉각중의 표준편차의 원인을 제공하는 TiC 석출물을 압연중에 다량 석출시키기 위해서는 중간수냉설비 후단부터 압연온도를 낮추어 사상압연시 가공발열을 최소로 하면서 종래에 고려되지 않았던 TiC 석출물의 석출을 발생시키기 위해서다.And, the finishing rolling inlet temperature is best 900 ~ 930 ℃. That is, in order to precipitate a large amount of TiC precipitates during the rolling during the rolling, the precipitation temperature is lowered from the rear end of the intermediate water cooling system, thereby minimizing the heat generation during finishing rolling. To make it happen.

이와 같은 조건이 되도록 여건을 조성함으로써 냉각시에 저온조직 및 TiC 석출물의 석출을 최소화할 수 있다.By forming the conditions to be in such a condition, it is possible to minimize the precipitation of low-temperature structure and TiC precipitates during cooling.

도 3에서 알 수 있듯이, 본 발명예1인 소재의 선재 코일의 평균인장강도는 비교예1의 58.8kg/mm2대비 3.3 kg/mm2정도 저하된 55.5 kg/mm2이었고, 이때의 표준편차도 기존대비 0.9 정도 저하된 2.09 이었다.As can be seen in Figure 3, the invention examples 1 having an average tensile strength of the wire material of the coil was a comparative example 58.8kg / mm of 12 compared to 3.3 kg / mm 2 degree of deterioration of 55.5 kg / mm 2, wherein the standard deviation of the The figure was 2.09, down about 0.9 from the previous level.

앞서 상세히 설명한 바와 같이 본 발명의 탄산가스 아크 용접봉용 선재제조방법은 압연중에 중간수냉설비를 설치하여 압연중 온도를 저하시켜 냉각시 저온조직 및 TiC 석출물을 최소화하여 용접봉 선재의 인장강도 상승 및 편차증가를 억제함으로써 탄산가스 아크용접시 용접와이어의 일정한 송급으로 용접아크의 안정성을 높일 수 있다.As described in detail above, the method of manufacturing the wire rod for carbonic acid arc welding rod of the present invention increases the tensile strength of the welding rod wire and increases the deviation by minimizing low-temperature structure and TiC precipitate during cooling by installing an intermediate water cooling facility during rolling to lower the temperature during rolling. By suppressing the stability of the welding arc by the constant supply of the welding wire when the carbon dioxide arc welding.

이상에서 본 발명의 탄산가스 아크 용접봉용 선재제조방법에 대한 기술사상을 첨부도면과 함께 서술하였지만 이는 본 발명의 가장 양호한 실시예를 예시적으로 설명한 것이지 본 발명을 한정하는 것은 아니다.The technical idea of the wire rod manufacturing method for a carbon dioxide arc welding electrode of the present invention has been described above with the accompanying drawings, but this is by way of example only and not intended to limit the present invention.

Claims (2)

강편재를 재가열하여 추출하는 단계와, 조압연와 중간조압연 및 사상압연을 거쳐 열간압연하는 단계와, 열간압연된 선재를 냉각설비를 거친 후 감는 단계를 포함하는 탄산가스 아크 용접봉용 선재제조방법에 있어서,The method of manufacturing a wire rod for carbon dioxide arc welding rod comprising the steps of reheating and extracting the steel piece, hot rolling through rough rolling, intermediate rough rolling and finishing rolling, and winding the hot rolled wire after passing through a cooling facility. In 상기 중간조압연과 사상압연의 사이에 중간수냉설비를 설치하여 0.15 ～ 0.25％의 타이타늄(Ti)을 첨가한 0.2％ 이하의 탄소를 함유한 저탄소강선재의 사상압연열 출구온도가 1050℃이하가 되도록 강냉시킴으로써 저온조직 및 TiC 석출물을 최소화하여 인장강도 상승 및 표준편차증가를 억제시키는 것을 특징으로 하는 탄산가스 아크 용접봉용 선재제조방법.The outlet temperature of the cold rolling of the low carbon steel wire containing 0.2% or less of carbon containing 0.15 to 0.25% of titanium (Ti) by installing an intermediate water cooling system between the intermediate rough rolling and the finishing rolling is not more than 1050 ° C. A method of manufacturing a wire rod for a carbon dioxide arc welding rod, characterized by minimizing low-temperature structure and TiC precipitates by cooling to reduce the increase in tensile strength and standard deviation. 제1항에 있어서, 상기 선재의 사상압연열 입구온도가 900 - 930℃인 것을 특징으로 하는 탄산가스 아크 용접봉용 선재제조방법.The method for manufacturing a wire rod for carbon dioxide arc welding electrodes according to claim 1, wherein the filamentary rolling heat inlet temperature of the wire rod is 900 to 930 ° C.
KR10-1998-0058293A 1998-12-24 1998-12-24 Carbon dioxide gas arc welding rod wire manufacturing method KR100421733B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-1998-0058293A KR100421733B1 (en) 1998-12-24 1998-12-24 Carbon dioxide gas arc welding rod wire manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR10-1998-0058293A KR100421733B1 (en) 1998-12-24 1998-12-24 Carbon dioxide gas arc welding rod wire manufacturing method

Publications (2)

Publication Number Publication Date
KR20000042185A KR20000042185A (en) 2000-07-15
KR100421733B1 true KR100421733B1 (en) 2004-05-20

Family

ID=19565432

Family Applications (1)

Application Number Title Priority Date Filing Date
KR10-1998-0058293A KR100421733B1 (en) 1998-12-24 1998-12-24 Carbon dioxide gas arc welding rod wire manufacturing method

Country Status (1)

Country Link
KR (1) KR100421733B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101432797B1 (en) 2012-12-27 2014-08-21 주식회사 포스코 Method for manufacturing special welding wire rod with excellent mechanical descalability

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100894041B1 (en) * 2002-10-28 2009-04-20 주식회사 포스코 Fabrication method of wire for welding wire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS558483A (en) * 1978-07-05 1980-01-22 Sumitomo Metal Ind Ltd Manufacture of directly heat treated high tension rod
JPS5782432A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tensile wire rod
KR940019876A (en) * 1993-02-04 1994-09-15 다나까 미노루 Low carbon equivalent rolled steel shape manufacturing method by controlled rolling
KR20000041276A (en) * 1998-12-22 2000-07-15 이구택 Method of temperature control rolling of thick steel plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS558483A (en) * 1978-07-05 1980-01-22 Sumitomo Metal Ind Ltd Manufacture of directly heat treated high tension rod
JPS5782432A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tensile wire rod
KR940019876A (en) * 1993-02-04 1994-09-15 다나까 미노루 Low carbon equivalent rolled steel shape manufacturing method by controlled rolling
KR20000041276A (en) * 1998-12-22 2000-07-15 이구택 Method of temperature control rolling of thick steel plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101432797B1 (en) 2012-12-27 2014-08-21 주식회사 포스코 Method for manufacturing special welding wire rod with excellent mechanical descalability

Also Published As

Publication number Publication date
KR20000042185A (en) 2000-07-15

Similar Documents

Publication Publication Date Title
EP1143022B1 (en) Method for producing a thin steel plate having high strength
US4040873A (en) Method of making low yield point cold-reduced steel sheet by continuous annealing process
KR100421733B1 (en) Carbon dioxide gas arc welding rod wire manufacturing method
JP3015923B2 (en) Manufacturing method for tough steel
US5597424A (en) Process for producing grain oriented electrical steel sheet having excellent magnetic properties
CN113695386B (en) HRB400E high-speed wire rod threaded steel with same-circle strength fluctuation not greater than 20Mpa and production method thereof
JPH0582458B2 (en)
JP2000087143A (en) Production of bainitic high tensile hot rolled steel strip
KR100340643B1 (en) Manufacture method of wire rod for welding rod
JP2776203B2 (en) Manufacturing method of cold rolled steel sheet excellent in non-aging at normal temperature
KR0140315B1 (en) Method for manufacturing concrete reinforcing high carbon steel wire for small deviation in teusile strength
JPH0747779B2 (en) Manufacturing method of cold-rolled steel sheet for deep drawing by continuous annealing method
KR20000040767A (en) Method for producing welding wire rod of small tensile strength deviation
JP2003055716A (en) Method for producing high workability high strength hot rolled steel sheet
KR890002614B1 (en) Process for manufacturing of high tension wire rod for pc steel wire
JPH09137232A (en) Production of high tensile strength hot rolled steel plate
JP3951512B2 (en) Method for producing a high workability cold-rolled steel sheet that has excellent press formability and little variation in press formability
JP2001089816A (en) Method of manufacturing high strength hot rolled steel plate
KR960006022B1 (en) Method of cooling speed controlling of cold rolling steel sheet
KR100238014B1 (en) The manufacturing method for wire rod used welding wire rod
JPS6148518A (en) Manufacture of hot rolled steel plate
JP2669231B2 (en) Manufacturing method of high r-value cold rolled steel sheet with small in-plane anisotropy
SU1341218A1 (en) Method of cooling wide-strip hot-rolled steel
CN115867680A (en) Method and apparatus for manufacturing grain-oriented electrical steel sheet
KR20010056909A (en) Tensile strength equalizing method for welding rod of gas-shield arc welding

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130213

Year of fee payment: 10

FPAY Annual fee payment

Payment date: 20140221

Year of fee payment: 11

FPAY Annual fee payment

Payment date: 20150216

Year of fee payment: 12

FPAY Annual fee payment

Payment date: 20160222

Year of fee payment: 13

FPAY Annual fee payment

Payment date: 20170221

Year of fee payment: 14

FPAY Annual fee payment

Payment date: 20180226

Year of fee payment: 15

EXPY Expiration of term