KR100419494B1 - A covered electrode for Ni alloy having high Cr content - Google Patents

A covered electrode for Ni alloy having high Cr content Download PDF

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KR100419494B1
KR100419494B1 KR10-2001-0018239A KR20010018239A KR100419494B1 KR 100419494 B1 KR100419494 B1 KR 100419494B1 KR 20010018239 A KR20010018239 A KR 20010018239A KR 100419494 B1 KR100419494 B1 KR 100419494B1
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coating
slag
welding
total weight
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KR10-2001-0018239A
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KR20020078205A (en
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하호준
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고려용접봉 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
    • B23K35/22—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
    • B23K35/3033—Ni as the principal constituent
    • B23K35/304—Ni as the principal constituent with Cr as the next major constituent

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

중량%로, C 0.05%이하, Si 0.50%이하, Mn 2.5 내지 3.5%, P 0.03%이하, S 0.015%이하, Fe 3.0%이하, Cu 0.50%이하, Ti 0.75%이하, Cr 18 내지 22%, Nb 2.0 내지 3.0%, Co 0.12%이하를 함유하고 불가피한 원소로써 O 및 N을 함유하며 잔부가 Ni로 된 합금을 심선으로 하고, 피복제 전중량에 대해 금속탄산염 1종 또는 2종 12 내지 23%, 금속불화물 1종 또는 2종 5 내지 18%, TiO2및 ZrO220 내지 32%, 탈산제 2 내지 5%, 합금제 35 내지 42%, 슬래그 생성제 3 내지 7%, 점결제 2 내지 4%를 함유하는 피복제를 심선에 피복함에 특징이 있는 니켈기 고크롬합금용 피복 아크 용접봉을 제공함으로써, 교류전원에서도 우수한 용접 작업성의 확보가 가능하고 내균열저항성 및 고온인장강도를 우수하게 한다.By weight%, C 0.05% or less, Si 0.50% or less, Mn 2.5 to 3.5%, P 0.03% or less, S 0.015% or less, Fe 3.0% or less, Cu 0.50% or less, Ti 0.75% or less, Cr 18 to 22% , Nb 2.0 to 3.0%, Co 0.12% or less, inevitable elements containing O and N, the balance of Ni as the core wire, one or two metal carbonates to the total weight of the coating 12 to 23 %, Metal fluorides 1 or 2 5 to 18%, TiO 2 and ZrO 2 20 to 32%, deoxidizer 2 to 5%, alloying 35 to 42%, slag generating agent 3 to 7%, caking agent 2 to 4 By providing a coating arc welding rod for nickel-based high chromium alloy, which is characterized by coating a coating material containing% on the core wire, it is possible to secure excellent welding workability even in an AC power source, and to improve crack resistance and high temperature tensile strength.

Description

니켈기 고크롬 합금용 피복 아크 용접봉{A covered electrode for Ni alloy having high Cr content}A covered electrode for Ni-based high chromium alloys {A covered electrode for Ni alloy having high Cr content}

본 발명은 피복 아아크 용접봉에 관한 것으로서, 더욱 상세하게는 니켈기 고크롬 합금의 용접에 적합한 피복 아크 용접봉에 관한 것이다.The present invention relates to a coated arc electrode, and more particularly, to a coated arc electrode suitable for welding nickel-based high chromium alloys.

일반적으로 니켈기 합금이라 함은 가압수형 원자력 발전 플랜트 등에 사용되는 300~350℃의 고온에 적당한 인코넬690합금(미국 INCO 사 상품명) 등을 말한다. 이러한 니켈기 합금은 용탕의 흐름이 나쁘고 피복 아크 용접시 용접 비이드가 볼록형으로 되기 쉬워, 슬래그 혼입 등의 용접결함이 많이 발생되었으며, 아크의 불안정함으로 인한 기공 등의 용접결함도 발생되었다. 이러한 점을 보완하기 위하여 용접전원으로써 직류를 사용해야 하는 불편한 점을 해결하지 못하였다.In general, the nickel-based alloy refers to Inconel 690 alloy (trade name of INCO, Inc.) suitable for high temperature of 300 ~ 350 ℃ used in pressurized water nuclear power plant. Such a nickel-based alloy has a poor melt flow and tends to be convex in welding beads during coating arc welding, resulting in many welding defects such as slag mixing, and welding defects such as pores due to instability of the arc. In order to compensate for this problem, the inconvenience of using direct current as a welding power source could not be solved.

본 발명은 상기와 같은 문제점을 감안하여 제안된 것으로서, 니켈기 고크롬 합금의 내균열 저항성 및 고온 인장강도 등의 기계적 성질을 확보할 뿐만 아니라용접시 용접결함이 발생되지 않으며, 직류 뿐만 아니라 교류에서도 용접작업성이 우수한 용접금속을 얻을 수 있는 피복 아크 용접봉을 제공함에 그 목적이 있다.The present invention has been proposed in view of the above problems, not only to ensure mechanical properties such as crack resistance and high temperature tensile strength of nickel-based high chromium alloys, welding defects do not occur during welding, even in direct current as well as alternating current It is an object of the present invention to provide a coated arc welding rod capable of obtaining a weld metal having excellent weldability.

본 발명의 상기와 같은 목적은 중량%로, C 0.05%이하, Si 0.50%이하, Mn 2.5 내지 3.5%, P 0.03%이하, S 0.015%이하, Fe 3.0%이하, Cu 0.50%이하, Ti 0.75%이하, Cr 18 내지 22%, Nb 2.0 내지 3.0%, Co 0.12%이하를 함유하고 불가피한 원소로써 O 및 N을 함유하며 잔부가 Ni로 된 합금을 심선으로 하고, 피복제 전중량에 대해 금속탄산염 1종 또는 2종 12 내지 23%, 금속불화물 1종 또는 2종 5 내지 18%, TiO2및 ZrO220 내지 32%, 탈산제 2 내지 5%, 합금제 35 내지 42%, 슬래그 생성제 3 내지 7%, 점결제 2 내지 4%를 함유하는 피복제를 상기 심선에 피복함에 특징이 있는 니켈기 고크롬합금용 피복 아크 용접봉에 의해 달성된다.The above object of the present invention by weight, C 0.05% or less, Si 0.50% or less, Mn 2.5 to 3.5%, P 0.03% or less, S 0.015% or less, Fe 3.0% or less, Cu 0.50% or less, Ti 0.75 Less than%, Cr 18-22%, Nb 2.0-3.0%, Co 0.12% or less and inevitable elements containing O and N, the balance of Ni alloy core, metal carbonate to the total weight of the coating 1 or 2 types 12 to 23%, 1 or 2 types of metal fluorides 5 to 18%, TiO 2 and ZrO 2 20 to 32%, deoxidizer 2 to 5%, alloys 35 to 42%, slag generating agent 3 to It is achieved by a coated arc electrode for nickel-based high chromium alloy, which is characterized by coating a coating material containing 7% and a binder 2-4% on the core wire.

이하, 본 발명의 심선 및 피복제 구성 성분의 역할에 관하여 상세히 설명한다.Hereinafter, the role of the core wire and the coating component of the present invention will be described in detail.

본 발명에서는 크롬의 함량이 낮은 인코넬600(미국 INCO 사 상품명)을 심선으로 사용하여 신선·절단 등의 가공성을 향상시켰으며, 특히 인코넬600은 당업계에서 널리 사용되고 있는 인코넬690에 비하여 열전도율이 높기때문에 용접시 발생되는 봉소현상을 방지할 수 있다. 즉 본 발명에 사용되는 심선의 조성은 중량%로,C 0.05%이하, Si 0.50%이하, Mn 2.5 내지 3.5%, P 0.03%이하, S 0.015%이하, Fe 3.0%이하, Cu 0.50%이하, Ti 0.75%이하, Cr 18 내지 22%, Nb 2.0 내지 3.0%, Co 0.12%이하를 함유하고 불가피한 원소로써 O 및 N을 함유하며 잔부로 Ni를 함유한다.In the present invention, using Inconel 600 (trade name of INCO Co., Ltd.) having a low chromium content as a core wire improves workability such as drawing and cutting, and especially Inconel 600 has higher thermal conductivity than Inconel 690, which is widely used in the art. It is possible to prevent rod phenomenon generated during welding. That is, the composition of the core wire used in the present invention is by weight, C 0.05% or less, Si 0.50% or less, Mn 2.5 to 3.5%, P 0.03% or less, S 0.015% or less, Fe 3.0% or less, Cu 0.50% or less, It contains 0.75% or less of Ti, 18 to 22% of Cr, 2.0 to 3.0% of Nb, 0.12% or less of Co, contains O and N as inevitable elements, and Ni as the balance.

금속탄산염은 용접 중 분해되어 CO2가스를 발생시킴으로써 아크 분위기를 대기로부터 차폐하여 용융 금속의 산화 및 질화를 방지하고 건전한 용접금속을 유지할 수 있도록 도와주는 역할을 하는 성분으로서, CaCO3, MgCO3, BaCO3등의 형태로 첨가된다. 그 첨가량은 상기의 금속탄산염에서 선택된 1종 또는 2종을 혼합하여 피복제 전체 중량을 기준으로 12 내지 23%로 하는 것이 바람직하며, 12% 미만 첨가시에는 CO2차폐가 부족하여 기공이 발생되며 동시에 수소균열이 일어나기 쉽다. 또한 23% 초과시에는 생성 슬래그의 용융온도가 높게 되어 슬래그의 유동성이 감소되어 용접 작업성이 저하되고 동시에 용접 비드의 형상이 불량해진다. 따라서 금속탄산염의 첨가량은 상기의 금속탄산염에서 선택된 1종 또는 2종을 혼합하여 12 내지 23중량%로 첨가하는 것이 바람직하다.Metal carbonate decomposes during welding to generate CO 2 gas, which shields the arc atmosphere from the atmosphere to prevent oxidation and nitriding of molten metal and helps maintain a healthy weld metal. CaCO 3 , MgCO 3 , It is added in the form of BaCO 3 and the like. The addition amount is preferably 12 to 23% based on the total weight of the coating material by mixing one or two selected from the above metal carbonate, when less than 12% CO 2 shielding is insufficient to generate pores At the same time, hydrogen cracking is likely to occur. In addition, if it exceeds 23%, the melting temperature of the produced slag becomes high, thereby reducing the fluidity of the slag, resulting in poor welding workability and poor shape of the weld bead. Therefore, the addition amount of the metal carbonate is preferably added at 12 to 23% by weight of one or two selected from the above metal carbonates.

금속불화물은 용강 및 용융 슬래그 중에 존재하는 수소의 제거를 도와주는 역할을 하며, 슬래그의 융점을 낮추어 유동성을 증가시키는 작용 및 슬래그 박리성을 향상시키고, 대표적인 금속불화물로는 CaF2, BaF2, MgF2등이 있다. 상기한 금속 불화물중 1종 또는 2종을 선택하여 피복제 전체 중량에 대하여 5 내지 18%를 첨가하는 것이 바람직하다. 금속불화물의 첨가량이 5%미만이면 슬래그의 유동성이 나쁘게 되어 비드 외관이 열화함과 동시에 입향자세에서의 용접이 곤란하게 되며, 18%를 초과하면 슬래그의 유동성이 너무 증가하여 슬래그 선행이 일어나 언더컷이 발생함과 동시에 용접 비드의 형상이 불량해진다. 따라서 금속불화물의 첨가량은 상기의 금속불화물에서 선택된 1종 또는 2종을 혼합하여 5 내지 18%를 첨가하는 것이 바람직하다.Metal fluoride helps to remove hydrogen present in molten steel and molten slag, lowers the melting point of slag, increases fluidity and improves slag peelability. Typical metal fluorides include CaF 2 , BaF 2 , and MgF. 2 and the like. It is preferable to select one or two of the above-described metal fluorides and add 5 to 18% of the total weight of the coating agent. If the added amount of the metal fluoride is less than 5%, the slag fluidity becomes poor and the appearance of the beads deteriorates and welding is difficult in the posture position. If the content of the metal fluoride exceeds 18%, the slag fluidity increases so much that the slag leading occurs and the undercut At the same time, the shape of the weld bead becomes poor. Therefore, the addition amount of the metal fluoride is preferably added 5 to 18% by mixing one or two selected from the metal fluoride.

TiO2및 ZrO2는 슬래그 형성제로서 슬래그의 유동성을 개선시키고, 비드에 광택을 부여하여 양호한 비드 형성에 기여하는 성분이면서 동시에 아크 안정제로서의 역할을 수행한다. 그러나 그 첨가량이 20%미만이면 그 효과가 미미하며, 32%를 초과하면 슬래그의 유동성이 과대해짐과 동시에 슬래그가 치밀하게 되어 박리성이 저하되므로 TiO2및 ZrO2의 첨가량은 피복제 전체 중량에 대하여 20 내지 32%로 하는 것이 바람직하다.TiO 2 and ZrO 2 as a slag forming agent improve the slag fluidity and give gloss to the beads to contribute to good bead formation and at the same time serve as arc stabilizers. However, if the added amount is less than 20%, the effect is insignificant. If the added amount is more than 32%, the slag fluidity becomes excessive and the slag becomes dense and the peelability decreases. Therefore, the amount of TiO 2 and ZrO 2 added to the total weight of the coating material It is preferable to set it as 20 to 32% with respect to.

탈산제는 용접금속의 내기공성을 강화하고 용접금속의 기계적 성능인 인장강도와 인성을 향상시키기 위하여 첨가하는 것으로서 그 예를 들면 Ti, Mn, Mg, Al, Si 및 Cr 등이 있으며 그 첨가량을 피복제 전중량에 대하여 2%미만으로 하면 그 효과가 미미하고, 5%를 초과하면 과탈산 현상에 의해 기공과 스패터 및 용접흄의 발생이 과다하여 작업성이 저하된다. 따라서 탈산제는 피복제 전체 중량에 대하여 2 내지 5%로 첨가하는 것이 바람직하다.The deoxidizer is added to enhance the porosity of the weld metal and to improve the tensile strength and toughness, which is the mechanical performance of the weld metal. Examples of the deoxidizer include Ti, Mn, Mg, Al, Si, Cr, and the like. If it is less than 2% of the total weight, the effect is insignificant, and if it exceeds 5%, the work deteriorates due to excessive generation of pores, spatters, and welding fumes due to excessive deoxidation. Therefore, the deoxidizer is preferably added at 2 to 5% based on the total weight of the coating agent.

합금제는 피복제의 모든 성분을 합금화시켜 단일성분처럼 역할을 행할 수 있도록 사용하는 첨가제로서, 그 첨가량이 피복제 전체 중량에 대하여 35%미만이면합금화하는 능력이 부족하며, 42%를 초과하면 용접 작업성이 저하된다. 따라서 합금제는 피복제 전체 중량에 대하여 35 내지 42중량%를 첨가하는 것이 바람직하다.The alloying agent is an additive used to alloy all the components of the coating to act as a single component. If the amount is less than 35% of the total weight of the coating, the alloying ability is insufficient. Workability deteriorates. Therefore, it is preferable to add 35-42 weight% of alloying agents with respect to the total weight of a coating agent.

슬래그 생성제로는 견운모, 가리장석 및 활석 등이 있으며, 이러한 슬래그 생성제는 충분한 슬래그의 형성을 도와주어 양호한 비드 형상을 만드는 역할을 하는 성분으로서, 그 첨가량이 피복제 전체 중량에 대하여 3%미만이면 슬래그가 충분히 생성되지 않아 불량한 비드가 형성되며, 7%를 초과하면 과다한 슬래그가 형성되어 피포가 두터워지며 비드가 처지거나 슬래그가 용융지를 과잉으로 덮게 되는 문제점이 발생된다. 따라서 슬래그 생성제의 첨가량은 피복제 전체 중량에 대하여 3 내지 7%로 하는 것이 바람직하다.Slag generators include biotite, feldspar and talc, and these slag generators contribute to the formation of sufficient slag to create a good bead shape. When the added amount is less than 3% of the total weight of the coating agent If the slag is not produced sufficiently, poor beads are formed, and if it exceeds 7%, excessive slag is formed to thicken the encapsulation, causing the beads to sag or the slag to cover the molten paper excessively. Therefore, it is preferable that the addition amount of the slag generating agent is 3 to 7% of the total weight of the coating agent.

점결제는 피복제를 심선에 잘 붙게 하기 위하여 사용하는 첨가제로서 물유리를 사용한다. 물유리의 예로는 규산소다, 규산카리 등이 있으며 이들을 단독으로 사용할 수도 있고, 혼합하여 사용할 수도 있다. 그 첨가량이 피복제 전체 중량에 대하여 2%미만이면 부착 효과가 미미하고, 4%를 초과하면 피복제가 심선에 균일하게 도포되지 않는 문제점이 발생된다. 따라서 점결제의 첨가량은 피복제 전체 중량에 대하여 2 내지 4%로 하는 것이 바람직하다.The caking agent uses water glass as an additive used to adhere the coating material to the core wire. Examples of water glass include sodium silicate, carry silicate and the like, which may be used alone or in combination. If the added amount is less than 2% with respect to the total weight of the coating agent, the adhesion effect is insignificant, and if it exceeds 4%, the coating agent is not uniformly applied to the core wire. Therefore, it is preferable that the addition amount of a caking additive shall be 2 to 4% with respect to the total weight of a coating agent.

이하, 상기와 같은 성분과 함량으로 구성된 본 발명의 피복 아크 용접봉에 대한 실시예를 통하여 보다 상세한 용접특성을 설명한다.Hereinafter, more detailed welding characteristics will be described through examples of the coated arc electrode of the present invention having the components and contents as described above.

본 발명에서는 앞서 언급하였듯이 심선으로는 인코넬600을 사용하였으며, 심선 위에 도포되는 피복제의 조성은 표 1과 같이 달리 하여 용접시험을 행하였다. 용접 작업성을 평가한 조건은 교류 및 직류 전원에서 용접을 행하였으며, 용접전류의 세기는 용접자세에 따라 120 내지 200A를 사용하였으며, 용접자세는 하향, 입향상진, 상향, 횡향, 수평필렛 등 전자세로 용접하였다. 상기와 같이 용접시험을 행하고 그 결과는 항목별로 5점부터 1점을 부여한 총점이 30점 만점에 26점 이상을 양호한 것으로 판정하였다. 표 2에 그 결과를 나타내었으며, ◎는 5점, ○ 4점, ◇는 3점, △는 2점, ⅹ는 1점으로 각각 평가된다.In the present invention, as mentioned above, Inconel 600 was used as the core wire, and the composition of the coating material applied on the core wire was different from that shown in Table 1 to perform a welding test. The welding work conditions were evaluated by AC and DC power supply. The welding current intensity was 120 ~ 200A depending on the welding posture, and the welding posture was downward, upward, upward, horizontal and horizontal fillets. Welded longitudinally. The welding test was carried out as described above, and the result was judged to be 26 or more points out of 30 points out of the total points given from 1 to 5 points per item. The results are shown in Table 2, ◎ is evaluated as 5 points, ○ 4 points, ◇ is 3 points, △ is 2 points, 평가 is 1 point.

구분division 금속탄산염Metal carbonate 금속불화물Metal fluoride TiO2및 ZrO2 TiO 2 and ZrO 2 탈산제Deoxidizer 합금제Alloy 슬래그 생성제Slag generator 점결제Payment 실시예Example 1One 16.016.0 5.05.0 30.030.0 4.04.0 37.037.0 5.05.0 3.03.0 22 15.515.5 18.018.0 20.020.0 3.53.5 35.035.0 5.05.0 3.03.0 33 23.023.0 10.010.0 22.022.0 2.52.5 36.036.0 3.03.0 3.53.5 44 18.018.0 8.08.0 20.020.0 2.02.0 42.042.0 7.07.0 3.03.0 55 12.012.0 13.013.0 28.028.0 2.02.0 38.038.0 4.04.0 3.03.0 비교예Comparative example 66 5.05.0 18.018.0 23.023.0 4.04.0 42.042.0 5.05.0 3.03.0 77 8.08.0 17.017.0 25.025.0 4.04.0 38.038.0 5.05.0 3.03.0 88 27.027.0 7.07.0 21.021.0 3.03.0 36.036.0 3.53.5 2.52.5 99 26.026.0 6.06.0 22.022.0 3.03.0 37.037.0 3.03.0 3.03.0 1010 24.024.0 3.03.0 25.025.0 3.03.0 37.037.0 5.05.0 3.03.0 1111 22.022.0 4.04.0 23.023.0 5.05.0 36.036.0 7.07.0 3.03.0 1212 11.011.0 22.022.0 21.021.0 3.03.0 36.036.0 4.04.0 3.03.0 1313 12.012.0 21.021.0 22.022.0 4.04.0 35.035.0 3.03.0 3.03.0 1414 21.521.5 15.015.0 18.018.0 3.03.0 36.036.0 3.03.0 3.53.5 1515 23.523.5 12.012.0 15.015.0 3.03.0 40.040.0 3.53.5 3.03.0 1616 11.011.0 6.06.0 37.037.0 4.04.0 36.036.0 3.03.0 3.03.0 1717 11.011.0 6.06.0 38.038.0 2.02.0 36.036.0 4.04.0 3.03.0 1818 16.016.0 13.013.0 25.025.0 3.03.0 38.038.0 2.02.0 3.03.0 1919 12.012.0 8.08.0 22.022.0 4.04.0 36.036.0 15.015.0 3.03.0 2020 8.08.0 4.04.0 34.034.0 3.03.0 43.043.0 5.05.0 3.03.0 2121 13.013.0 3.03.0 37.037.0 3.03.0 36.036.0 5.05.0 3.03.0 2222 16.016.0 22.022.0 14.014.0 4.04.0 36.036.0 5.05.0 3.03.0 2323 8.08.0 9.09.0 37.037.0 3.03.0 36.036.0 4.04.0 3.03.0 2424 26.026.0 12.012.0 15.015.0 3.03.0 37.037.0 4.04.0 3.03.0 2525 27.027.0 3.03.0 24.024.0 3.03.0 37.037.0 3.03.0 3.03.0 2626 5.05.0 24.024.0 25.025.0 3.03.0 37.037.0 3.03.0 3.03.0 2727 30.030.0 3.03.0 17.017.0 3.03.0 38.038.0 6.06.0 3.03.0 2828 8.08.0 25.025.0 18.018.0 3.03.0 38.038.0 5.05.0 3.03.0 2929 27.027.0 7.07.0 12.012.0 3.03.0 36.036.0 12.012.0 3.03.0 3030 17.017.0 12.012.0 16.016.0 3.03.0 37.037.0 12.012.0 3.03.0 3131 8.08.0 13.013.0 23.023.0 3.03.0 37.037.0 13.013.0 3.03.0 3232 20.020.0 3.03.0 22.022.0 3.03.0 36.036.0 13.013.0 3.03.0

구분division 아크 감각Arc sense 비드 외관Bead appearance 슬래그 유동성Slag fluidity 슬래그 박리성Slag peelability 용적이행상태Running capacity 용융균일성Melt uniformity 종합평가Comprehensive Evaluation 실시예Example 1One ◎◎ ◎◎ ○○ ◎◎ ◎◎ ◎◎ 2929 22 ○○ ◎◎ ○○ ◎◎ ○○ ◎◎ 2727 33 ◎◎ ○○ ◎◎ ○○ ◎◎ ◎◎ 2828 44 ○○ ◎◎ ◎◎ ◎◎ ○○ ○○ 2727 55 ○○ ◎◎ ○○ ◎◎ ◎◎ ◎◎ 2828 비교예Comparative example 66 ○○ ○○ ◇◇ ○○ ◇◇ ○○ 2222 77 ○○ ○○ ◇◇ ○○ ○○ ○○ 2323 88 ○○ ◇◇ △△ △△ ◎◎ ○○ 2020 99 ○○ ◇◇ △△ ○○ ○○ ○○ 2121 1010 ◎◎ ○○ ◇◇ ◇◇ ◇◇ ○○ 2222 1111 ◎◎ ○○ ◇◇ ◇◇ ○○ ○○ 2323 1212 ○○ ◇◇ △△ △△ ◇◇ ○○ 1818 1313 ○○ ◇◇ △△ △△ ◇◇ ○○ 1818 1414 ◇◇ ◇◇ ◇◇ ◇◇ ◇◇ ○○ 1919 1515 ◇◇ ◇◇ ◇◇ ◇◇ ◇◇ ○○ 1919 1616 ○○ ◇◇ ◇◇ ○○ ◎◎ ○○ 2323 1717 ○○ ○○ ◇◇ ○○ ○○ ○○ 2323 1818 ○○ ◇◇ △△ ◇◇ ○○ ○○ 2020 1919 ○○ ◇◇ △△ △△ ○○ ○○ 1919 2020 ○○ ◇◇ △△ ◇◇ ○○ ○○ 2020 2121 ○○ ○○ ◇◇ ◇◇ ○○ ◇◇ 2121 2222 ◇◇ ◇◇ △△ △△ ◇◇ ◇◇ 1616 2323 ○○ ○○ ◇◇ ◇◇ ○○ ◇◇ 2121 2424 ◇◇ ◇◇ △△ △△ △△ △△ 1414 2525 ○○ ○○ ◇◇ ◇◇ ○○ ◇◇ 2121 2626 ○○ ◇◇ △△ ⅹⅩ ○○ ◇◇ 1717 2727 ◇◇ △△ △△ ⅹⅩ △△ △△ 1212 2828 ◇◇ △△ △△ ⅹⅩ △△ △△ 1212 2929 ◇◇ △△ △△ ⅹⅩ △△ △△ 1212 3030 ◇◇ △△ △△ ⅹⅩ △△ △△ 1212 3131 ○○ ◇◇ △△ ⅹⅩ ◇◇ ◇◇ 1616 3232 ○○ ◇◇ △△ ⅹⅩ ◇◇ ◇◇ 1616

본 발명에 따른 실시예는 종합평가 결과 27점 이상으로, 용접작업성이 우수한 것으로 나타났으나, 비교예로부터는 만족스러운 결과를 얻지 못하였다. 비교예 6, 7 및 9는 금속탄산염의 첨가량이 제안한 범위를 벗어나는 것으로서 슬래그의 유동성이 열세로 나타났다. 비교예 10, 12, 25 및 26은 금속탄산염과 금속불화물의첨가량이 바람직하지 못한 예로서 슬래그 박리성이 현저하게 감소한 것으로 나타났다. 비교예 15, 16, 17, 23 및 24는 금속탄산염과 TiO2및 ZrO2의 첨가량이 제안한 범위를 넘어서는 것으로서 슬래그 유동성과 비드 외관이 불량한 것으로 나타났다. 비교예 21과 22는 금속불화물과 TiO2및 ZrO2가 제안된 범위를 만족하지 못하는 것으로서 슬래그 유동성과 박리성이 열세인 것으로 나타났다. 비교예 8, 11, 13, 14, 18, 19, 20, 27, 28, 29, 30, 31 및 32도 본 발명의 범위를 벗어나는 예로서 비드 외관이나 용융균일성 등이 불량하게 평가되었으며, 특히 슬래그의 유동성과 박리성이 열세로 나타났다.Example according to the present invention was 27 points or more in the comprehensive evaluation, the welding workability was found to be excellent, but the satisfactory result was not obtained from the comparative example. Comparative Examples 6, 7, and 9 showed that the slag fluidity was inferior as the addition amount of the metal carbonate was outside the proposed range. In Comparative Examples 10, 12, 25 and 26, the addition of metal carbonate and metal fluoride was found to be markedly reduced in slag peelability as an undesirable example. In Comparative Examples 15, 16, 17, 23 and 24, the addition amount of metal carbonate, TiO 2 and ZrO 2 exceeded the suggested range, and the slag fluidity and the appearance of beads were poor. In Comparative Examples 21 and 22, the metal fluoride, TiO 2 and ZrO 2 did not satisfy the proposed range, and the slag fluidity and peelability were inferior. Comparative Examples 8, 11, 13, 14, 18, 19, 20, 27, 28, 29, 30, 31, and 32 were also poorly evaluated as bead appearance and melt uniformity as examples outside the scope of the present invention. The slag fluidity and peelability were inferior.

즉 본 발명에서 채택한 심선인 인코넬600의 피복제로는 본 발명이 제안한 조성비를 갖는 피복제를 사용할 때 가장 우수한 성능을 발휘함을 알 수 있다.That is, it can be seen that the coating material of Inconel 600, which is the core wire adopted in the present invention, exhibits the best performance when the coating agent having the composition ratio proposed by the present invention is used.

본 발명에 따르면, 니켈기 고크롬 합금의 용접시에도 용접결함이 발생되지 않으며, 직류 뿐만 아니라 교류에서도 용접작업성이 우수한 용접금속을 얻을 수 있다. 또한 내균열저항성 및 고온인장강도 등과 같은 물리적 특성이 만족스러운 용접금속을 얻을 수 있는 실제적인 효과가 있다.According to the present invention, welding defects are not generated even when the nickel-based high chromium alloy is welded, and a welding metal having excellent welding workability can be obtained not only in direct current but also in alternating current. In addition, there is a practical effect of obtaining a weld metal with satisfactory physical properties such as crack resistance and high temperature tensile strength.

Claims (1)

니켈기 고크롬합금용 피복 아크 용접봉에 있어서, 전체 중량%로, 심선은 C가 0.05%이하, Si가 0.50%이하, Mn가 2.5 내지 3.5%, P가 0.03%이하, S가 0.015%이하, Fe가 3.0%이하, Cu가 0.50%이하, Ti가 0.75%이하, Cr가 18 내지 22%, Nb가 2.0 내지 3.0%, Co가 0.12%이하를 함유하고 불가피한 원소로써 O 및 N을 함유하며 잔부가 Ni으로 구성되며, 피복제에 대해서는 전중량에 대하여 금속탄산염의 1종 또는 2종이 12 내지 23%, 금속불화물의 1종 또는 2종이 5 내지 18%, TiO2및 ZrO2이 20 내지 32%, 탈산제가 2 내지 5%, 합금제가 35 내지 42%, 슬래그 생성제가 3 내지 7%, 점결제가 2 내지 4%를 함유하고 상기 심선에 피복하는 것을 특징으로 하는 니켈기 고크롬합금용 피복 아크 용접봉.In the coated arc welding rod for nickel-based high chromium alloy, the total weight is about 0.05% or less of C, 0.50% or less of Si, 2.5 to 3.5% of Mn, 0.03% or less of P, 0.015% or less of S, Fe is less than 3.0%, Cu is less than 0.50%, Ti is less than 0.75%, Cr is 18 to 22%, Nb is 2.0 to 3.0%, Co is less than 0.12%. It is composed of addition Ni, 12 to 23% of one or two metal carbonates, 5 to 18% of one or two metal fluorides, 20 to 32% of TiO 2 and ZrO 2 with respect to the total weight of the coating agent. Coating arc for nickel-based high chromium alloys comprising 2 to 5% deoxidizer, 35 to 42% alloying agent, 3 to 7% slag generating agent and 2 to 4% caking agent and covering the core wire Welding.
KR10-2001-0018239A 2001-04-06 2001-04-06 A covered electrode for Ni alloy having high Cr content KR100419494B1 (en)

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JPS5992195A (en) * 1982-11-18 1984-05-28 Nippon Steel Corp Ni-cr base covered arc welding rod
JPH11347790A (en) * 1998-06-08 1999-12-21 Mitsubishi Heavy Ind Ltd Coated electrode for ni group high cr alloy

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JPS5992195A (en) * 1982-11-18 1984-05-28 Nippon Steel Corp Ni-cr base covered arc welding rod
JPH11347790A (en) * 1998-06-08 1999-12-21 Mitsubishi Heavy Ind Ltd Coated electrode for ni group high cr alloy

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