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WO2015105011A1 - Électrode de soudage à l'arc revêtue de type à faible teneur en hydrogène - Google Patents

Électrode de soudage à l'arc revêtue de type à faible teneur en hydrogène Download PDF

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Publication number
WO2015105011A1
WO2015105011A1 PCT/JP2014/084438 JP2014084438W WO2015105011A1 WO 2015105011 A1 WO2015105011 A1 WO 2015105011A1 JP 2014084438 W JP2014084438 W JP 2014084438W WO 2015105011 A1 WO2015105011 A1 WO 2015105011A1
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WIPO (PCT)
Prior art keywords
mass
coating
compound
total
arc welding
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Application number
PCT/JP2014/084438
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English (en)
Japanese (ja)
Inventor
良彦 北川
洋平 片野
章泰 片岡
Original Assignee
株式会社神戸製鋼所
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Application filed by 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Priority to MYPI2016702453A priority Critical patent/MY184309A/en
Priority to KR1020167017987A priority patent/KR101827193B1/ko
Priority to CN201480072045.8A priority patent/CN105873717B/zh
Priority to SG11201604856XA priority patent/SG11201604856XA/en
Publication of WO2015105011A1 publication Critical patent/WO2015105011A1/fr

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Classifications

    • 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
    • B23K35/24—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
    • 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
    • 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
    • B23K35/3603—Halide salts
    • B23K35/3605—Fluorides
    • 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
    • B23K35/3607—Silica or silicates
    • 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
    • B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials

Definitions

  • the present invention relates to a low hydrogen-based coated arc welding rod in which a steel core wire is coated with a low hydrogen-based coating agent. More specifically, the present invention relates to a technique for improving the moisture absorption resistance of a low hydrogen-based coated arc welding rod.
  • Patent Document 1 proposes a coated arc welding rod in which glass powder is blended with a coating agent.
  • Patent Documents 2 to 4 propose a coated arc welding rod using an alkali metal silicate aqueous solution as a coating agent fixing agent.
  • the main object of the present invention is to provide a low hydrogen-based arc welding rod capable of improving the moisture absorption resistance without deteriorating the fixing property of the coating agent or welding workability.
  • the low hydrogen-based coated arc welding rod according to the present invention is a low-hydrogen-based coated arc welding rod in which a steel core wire is coated with a coating agent, and the coating agent is a metal carbonate (CO 2 equivalent): 8 to 25 %
  • metal fluoride (F conversion) 2 to 15% by mass
  • at least one of TiO 2 , ZrO 2 and Al 2 O 3 2 to 10% by mass in total
  • SiO 2 3 to 12% by mass
  • Mn 1 to 8 mass%
  • at least one of Na compound (Na conversion) and K compound (K conversion) 1.0 to 3.5% by mass in total, with the balance being Fe and inevitable impurities, Li compound content (Li conversion value) [Li], Na compound content (Na conversion value) [Na], when the K compound content (K converted value) is [K],
  • a composition satisfying the coverage of the coating is 22 to 45 mass%.
  • the coating agent may be regulated to C: 0.1% by mass or less.
  • the coating agent may contain Ti: 0.2 to 2.0% by mass.
  • the coating agent may contain B compound (B conversion): 0.02 to 0.3% by mass.
  • the coating agent may contain Ni: 0.5 to 10% by mass.
  • the coating agent may contain at least one of Cr and Mo: 0.1 to 3% by mass in total.
  • the coating agent may contain at least one of Al and Mg: 0.2 to 2% by mass in total.
  • the steel core wire can be formed of, for example, mild steel or low alloy steel.
  • the low hydrogen-based coated arc welding rod according to the embodiment of the present invention has a metal carbonate (CO 2 equivalent): 8 to 25% by mass, a metal fluoride (F equivalent): 2 to 15% by mass, TiO 2 , ZrO 2 And at least one of Al 2 O 3 : 2 to 10 mass% in total, SiO 2 : 3 to 12 mass%, Si: 1 to 7 mass%, Mn: 1 to 8 mass%, Li compound (Li conversion) : 0.03 to 0.7% by mass, at least one of Na compound (Na conversion) and K compound (K conversion): 1.0 to 3.5% by mass in total, the balance being Fe and inevitable
  • the steel core wire is coated with a coating material composed of impurities and satisfying the following mathematical formula 2.
  • the coating rate of the coating material is 22 to 45% by mass.
  • Equation 2 [Li] is the Li compound content (Li conversion value), [Na] is the Na compound content (Na conversion value), and [K] is the K compound content (K conversion value). .
  • the coating rate (%) of the coating agent of the coated arc welding rod is calculated by (mass of coating agent / total mass of welding rod) ⁇ 100.
  • the coating rate of the coating agent is less than 22% by mass, the shield is insufficient, the N content and the hydrogen content in the weld metal increase, and the toughness and crack resistance of the weld metal decrease.
  • the coating rate of the coating agent exceeds 45% by mass, the arc length becomes long and arc breakage occurs. Therefore, the coating rate of the coating agent is 22 to 45% by mass.
  • Metal carbonate has the effect of reducing the amount of N and hydrogen in the weld metal.
  • the amount of metal carbonate in the coating is less than 8% by mass in terms of CO 2 , the amount of hydrogen in the weld metal exceeds 4 ml / 100 g and the amount of N becomes excessive, resulting in good crack resistance. It is not possible to obtain properties and toughness.
  • the amount of metal carbonate in the coating exceeds 25% by mass in terms of CO 2 , the viscosity of the slag becomes excessive and vertical welding becomes difficult. Therefore, the metal carbonate content (CO 2 equivalent value) is 8 to 25% by mass with respect to the total mass of the coating agent.
  • the amount of metal carbonate in the coating is preferably 11% by mass or more, more preferably 16% by mass or more in terms of CO 2 from the viewpoint of reducing the amount of hydrogen and the amount of N in the weld metal.
  • the amount of metal carbonate is preferably 22% by mass or less in terms of CO 2 .
  • specific examples of the metal carbonate to be blended in the coatings and the like CaCO 3, MgCO 3 and BaCO 3.
  • the metal fluoride has an effect of adjusting the viscosity of the slag to improve the welding workability.
  • the amount of metal fluoride in the coating is less than 2% by mass in terms of F, the viscosity of the slag becomes too high and the bead shape deteriorates.
  • the amount of metal fluoride in the coating exceeds 15% by mass in terms of F, the arc becomes unstable. Therefore, the metal fluoride content (F converted value) is 2 to 15% by mass with respect to the total mass of the coating agent.
  • the amount of metal fluoride in the coating is preferably 4% by mass or more from the viewpoint of improving the bead shape, and preferably 10% by mass or less from the viewpoint of stabilizing the arc.
  • the metal fluoride to be incorporated in coatings such as CaF 2, BaF 2, AlF 3 and LiF and the like.
  • TiO 2 , ZrO 2 , Al 2 O 3 2 to 10% by mass in total
  • TiO 2 , ZrO 2 and Al 2 O 3 act as a slag fouling agent.
  • the total content of TiO 2 , ZrO 2 and Al 2 O 3 is less than 2% by mass with respect to the total weight of the coating agent, the viscosity of the slag decreases and the bead shape deteriorates. Therefore, for the TiO 2, ZrO 2 and Al 2 O 3, formulated to be at least one, a total of 2 mass% or more.
  • the total content of TiO 2 , ZrO 2 and Al 2 O 3 is 10% by mass or less per the total mass of the coating agent.
  • the total content of TiO 2 , ZrO 2 and Al 2 O 3 in the coating is preferably 3% by mass or more from the viewpoint of the bead shape, and 8% by mass or less from the viewpoint of slag removability. preferable.
  • TiO 2, ZrO 2 and Al 2 O 3 is not necessary to blend all, by incorporating at least one in the coating agent, effects are obtained as described above.
  • SiO 2 acts as a binder and a slag-faux agent.
  • the amount of SiO 2 in the coating exceeds 12% by mass with respect to the total mass of the coating, the slag becomes glassy and the slag releasability deteriorates.
  • the SiO 2 content is 3 to 12% by mass with respect to the total mass of the coating agent.
  • the amount of SiO 2 in the coating is preferably 4% by mass or more from the viewpoint of improving the binder effect, and is preferably 9% by mass or less from the viewpoint of slag removability.
  • MgO, CaO, etc. can be added for the purpose of viscosity adjustment other than the acidic oxide mentioned above.
  • potassium silicate, sodium silicate, etc. can be used as a binder.
  • the silicate containing crystal water, for example, mica, talc, sericite, etc. is not substantially contained in order to increase the amount of hydrogen in the weld metal.
  • Si acts as an oxygen scavenger and can be added in the form of alloy components such as Fe-Si and Fe-Si-Mn.
  • the Si content is less than 1% by mass with respect to the total mass of the coating agent, the effect as an oxygen scavenger becomes insufficient, and when it exceeds 7% by mass, the viscosity of the molten metal becomes high, and the base material The workability of welding deteriorates, for example, the familiarity with the machine decreases. Therefore, the Si content is 1 to 7% by mass with respect to the total mass of the coating agent.
  • Si content herein does not include Si contained in the SiO 2 described above.
  • Mn is an element that acts as a deoxidizer and is effective in improving the toughness of the weld metal.
  • Mn can be added to the coating in the form of metal Mn, Fe—Mn, or the like.
  • Mn content is less than 1% by mass with respect to the total mass of the coating agent, deoxidation is insufficient and blowholes are generated.
  • Mn content exceeds 8% by mass with respect to the total mass of the coating material, the viscosity of the molten metal is lowered to have a convex bead tendency, and the welding workability is deteriorated.
  • the Mn content is 1 to 8% by mass with respect to the total mass of the coating agent.
  • the amount of Mn in the coating is preferably 2% by mass or more in consideration of the toughness of the weld metal, and is preferably 5% by mass or less from the viewpoint of improving welding workability.
  • Li has an effect of improving the moisture absorption resistance of the coating agent, and is generally added to water glass.
  • the Li compound in the coating agent is less than 0.03% by mass in terms of Li, the effect of improving the hygroscopic resistance cannot be obtained.
  • the Li compound in the coating agent exceeds 0.7% by mass in terms of Li, the moisture absorption resistance is improved, but the viscosity of the water glass is reduced, and the performance as a lubricant in the coating step of the coating agent is improved. The covering operation becomes difficult.
  • the amount of Li compound exceeds 0.7% by mass, the fixing strength is lowered, and thus the coating agent is easily dropped after coating and dry cracking is likely to occur during drying.
  • the Li compound content is set to 0.03 to 0.7% by mass with respect to the total mass of the coating agent in terms of Li.
  • the Li compounds in addition to Li 2 O is added to the water glass, or the like can be used LiCO 3 and LiF.
  • Na and K have the effect of ensuring the adhesion of the coating material and the arc stability.
  • the arc becomes unstable and the fixing strength is increased. Since it falls, it will become easy to produce the dry cracking at the time of the fall of the coating agent after coating, and drying.
  • the total of the Na compound (Na converted value) and the K compound (K converted value) in the coating exceeds 3.5% by mass with respect to the total mass of the coating, the moisture absorption resistance of the coating deteriorates.
  • the total of the Na compound content (Na converted value) and the K compound content (K converted value) in the coating is in the range of 1.0 to 3.5% by mass.
  • Li compound content Li conversion value
  • Na compound content Na conversion value
  • K conversion value K conversion value
  • the composition satisfies Formula 2 above.
  • Li, Na and K have conflicting effects with respect to the influence of the coating on the fixing strength and moisture absorption resistance. That is, Li has the effect of improving the moisture absorption resistance while reducing the fixing strength of the coating agent.
  • Na and K have the effect of increasing the fixing strength, but decrease the moisture absorption resistance.
  • the adhesion strength of these alkaline components and the degree of influence on moisture absorption have a correlation with the atomic radius of each element.
  • the present inventor expressed the atomic radius of Na as 1.22, the atomic radius of K as 1.49, and arranged Na and K as the numerator and Li as the denominator. It has been found that the fixing strength and moisture absorption resistance of the coating can be evaluated simultaneously with the parameter of (1.22 ⁇ [Na] + 1.49 ⁇ [K]) / [Li].
  • Ti 0.2 to 2.0% by mass
  • Ti is a deoxidizing element and an element effective for improving the strength of the weld metal.
  • Ti also has the effect of producing a fine spherical oxide and refining the structure of the weld metal.
  • the content of Ti is less than 0.2% by mass with respect to the total mass of the coating agent, a sufficient deoxidizing effect and a weld metal strength improving effect cannot be obtained.
  • the Ti content exceeds 2.0 mass%, the amount of Ti in the weld metal increases excessively, the strength and hardness become excessively high, and the toughness of the weld metal decreases. Therefore, when Ti is added, its content is 0.2 to 2.0 mass% per the total mass of the coating agent.
  • Ti can be added in the form of Fe—Ti, metal Ti, or the like.
  • B is an element effective in suppressing the formation of grain boundary ferrite and having a strong hardenability.
  • B content in the coating material is less than 0.02% by mass in terms of B, the effect of suppressing the formation of grain boundary ferrite by B cannot be obtained, and the metal structure of the weld metal becomes rough.
  • the content of B in the coating exceeds 0.3% by mass, the weld metal exhibits a coarse lath structure and the toughness deteriorates. Therefore, when B is added, its content (B converted value) is set to 0.02 to 0.3% by mass with respect to the total mass of the coating agent. Note that Fe-B, Fe-Si-B, metal B, and the like can be added.
  • Ni has the effect of increasing the strength and toughness of the weld metal.
  • Ni when the use temperature of the welded member is lower than ⁇ 40 ° C., Ni is added to achieve both the strength and toughness of the weld metal. Is desirable.
  • the Ni content is less than 0.5% by mass with respect to the total mass of the coating agent, the effect of improving the toughness of the weld metal cannot be obtained.
  • the Ni content exceeds 10% by mass with respect to the total mass of the coating agent, the strength of the weld metal becomes too high and the toughness is lowered, and hot cracking is likely to occur during welding. Therefore, when Ni is added, the content is 0.5 to 10% by mass with respect to the total mass of the coating agent.
  • Ni can be added in the form of metal Ni, Ni—Mg, Fe—Ni, or the like.
  • Cr and Mo have the effect of improving the strength of the weld metal.
  • the total content of Cr and Mo is less than 0.1% by mass with respect to the total mass of the coating material, the effect of improving the strength of the weld metal cannot be obtained.
  • the total content of Cr and Mo exceeds 3% by mass with respect to the total mass of the coating material, the hardenability becomes excessive and carbides are generated, so that the toughness of the weld metal deteriorates. Therefore, when Cr and Mo are added, the total amount is in the range of 0.1 to 3% by mass with respect to the total mass of the coating agent. It is not necessary to add both Cr and Mo, and only one of them may be added.
  • Al and Mg are strong deoxidizers and have the effect of reducing the amount of oxygen in the weld metal and improving toughness.
  • the total content of Al and Mg is less than 0.2% by mass with respect to the total mass of the coating material, the effect of improving the toughness of the weld metal cannot be obtained.
  • the total content of Al and Mg exceeds 2% by mass with respect to the total mass of the coating agent, the arc becomes unstable, the amount of spatter generated increases, the viscosity of the slag decreases, and the slag peelability decreases. to degrade. Therefore, when Al and Mg are added, the total content thereof is 0.2 to 2% by mass with respect to the total mass of the coating agent. Note that it is not necessary to add both of Al and Mg, and only one of them may be added.
  • Step core wire Examples of the steel material used for the steel core wire include mild steel and low alloy steel.
  • the coating composition in particular, the relationship between the Li compound content and the Na compound content and the K compound content is specified.
  • the moisture absorption resistance can be improved without deteriorating the adhesiveness and welding workability of the agent.
  • a weld metal having a diffusible hydrogen content of 4 ml / 100 g or less can be obtained by using the low hydrogen-based coated arc welding rod of this embodiment.
  • a first aspect a low hydrogen-based arc welding rod in which a steel core wire is coated with a coating agent,
  • the coating agent is Metal carbonate (CO 2 equivalent): 8-25% by mass, Metal fluoride (F conversion): 2 to 15% by mass, At least one of TiO 2 , ZrO 2 and Al 2 O 3 : 2 to 10% by mass in total, SiO 2 : 3 to 12% by mass, Si: 1-7% by mass, Mn: 1 to 8% by mass, Li compound (Li conversion): 0.03 to 0.7% by mass, At least one of Na compound (Na conversion) and K compound (K conversion): 1.0 to 3.5% by mass in total And the balance consists of Fe and inevitable impurities,
  • the Li compound content (Li conversion value) is [Li]
  • the Na compound content (Na conversion value) is [Na]
  • the K compound content (K conversion value) is [K]
  • the said coating agent is a low hydrogen type
  • Third aspect The low hydrogen-based coated arc welding rod according to the first aspect or the second aspect, wherein the coating agent further contains Ti: 0.2 to 2.0% by mass.
  • Fourth aspect The low hydrogen-based coated arc welding rod according to any one of the first to third aspects, wherein the coating agent further contains a B compound (converted to B): 0.02 to 0.3 mass%.
  • Fifth aspect The low hydrogen-based coated arc welding rod according to any one of the first to fourth aspects, wherein the coating agent further contains Ni: 0.5 to 10% by mass.
  • the coating agent further includes at least one of Cr and Mo: the total content of 0.1 to 3% by mass.
  • the moisture absorption resistance was as follows.
  • the coated arc welding rod re-dried by heating for 1 hour under a temperature condition of 350 ° C. was exposed to an atmosphere of 30 ° C. and 80% relative humidity for 6 hours, and the coating agent absorbed moisture.
  • the water content was evaluated by measuring by the Karl Fischer method (vaporization method). At the time of measurement, heating was performed at 750 ° C. in order to vaporize moisture from the coating material, and the dry air was guided to the measuring device as a carrier gas. As a result, it was judged that the water content in the coating material was 3000 ppm by mass or less.
  • each welding rod was heated at 350 ° C. for 1 hour before welding.
  • Mechanical performance was evaluated by the tensile strength of weld metal (TS (Tensile Strength)) and the absorbed energy (vE-20 ° C) of the Charpy impact test at -20 ° C. What was there was judged to be good.
  • the welding workability was evaluated in four stages of ⁇ , ⁇ , ⁇ , and ⁇ depending on the sensory, and ⁇ and ⁇ were judged to be good.
  • ⁇ Adhesiveness of coating agent The fixing property of the coating material is first observed after firing by visual observation of the presence or absence of cracks on the surface of the coating material, and then the stability of the protective cylinder during welding is classified into four stages according to sensation: ⁇ , ⁇ , ⁇ and ⁇ . evaluated. As a result, ⁇ and ⁇ were judged as good.
  • ⁇ Diffusion hydrogen amount> In a downward welding posture, the polarity was AC or DCEP (direct current rod plus), welding was performed in one pass under conditions of a welding current of 150 to 160 A, a welding voltage of 22 V, and a welding speed of 180 mm / min. At that time, the welding atmosphere was a temperature of 20 ° C. and a relative humidity of 10%. Moreover, in order to re-dry the coating material, each welding rod was heated under a temperature condition of 350 ° C. for 1 hour before welding.
  • the amount of diffusible hydrogen in the weld metal obtained by welding was measured by a method based on JIS Z 3118: 2007. As a result, it was judged that the diffusible hydrogen content was 4.0 ml / 100 g or less.
  • Table 4 The above evaluation results are summarized in Table 4 below.
  • the welding rod No. 31 is inferior in hygroscopic resistance because (1.22 ⁇ [Na] + 1.49 ⁇ [K]) / [Li] exceeds the range of the present invention in the component composition of the coating agent. The amount of diffused hydrogen was also large. On the other hand, no. In the welding rod of 32, in the component composition of the coating, (1.22 ⁇ [Na] + 1.49 ⁇ [K]) / [Li] is less than the range of the present invention, so that the fixing strength of the coating is low. Furthermore, since the total content of Na compound and K compound is less than the range of the present invention, the arc becomes unstable.
  • the 42 welding rod was inferior in moisture absorption resistance because the total of Na compound content and K compound content in the coating exceeded the range of the present invention.
  • the metal fluoride content was less than the range of the present invention in the component composition of the coating, so the viscosity of the slag increased and the bead shape deteriorated.
  • the welding rod of No. 44 since the Li compound content exceeded the range of the present invention in the component composition of the coating material, the fixing strength of the coating material decreased.
  • the welding rod of No. 45 had good moisture absorption resistance, adhesion of the coating material and welding workability. However, Ti was added to the coating material in an amount exceeding 2.0 mass% and exceeding 0.3 mass%. Since the B compound was added, the toughness of the weld metal was lowered. Similarly, no. The 46 welding rod also had good moisture absorption characteristics, coating adhesiveness and welding workability, but the Ni added to the coating exceeded 10% by mass, so the weld metal toughness decreased. .
  • the 47 welding rod also had good moisture absorption characteristics, adhesion of the coating and welding workability. However, since Cr and Mo were added to the coating exceeding 3% by mass, the toughness of the weld metal was high. Declined. On the other hand, no. In the 48 welding rod, since Al and Mg were added in an amount exceeding 2% by mass to the coating agent, the arc became unstable and the slag peelability was also lowered.
  • the welding rods 1 to 30 were excellent in moisture absorption resistance, and had good coating adhesion and welding workability. In addition, no. Since the welding rods 1 to 28, 30 contain a specific amount of one or more elements of Ti, B compound, Ni, Cr, Mo, Al and Mg, the content of these elements is Less No. Compared to 29 welding rods, the mechanical properties of the weld metal were superior.

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

Abstract

L'objectif de la présente invention est de fournir une électrode de soudage à l'arc revêtue de type à faible teneur en hydrogène au moyen de laquelle il est possible d'améliorer la résistance à l'absorption d'humidité sans provoquer de réduction de capacité de fixation d'un agent de revêtement ou d'efficacité fonctionnelle de soudage. L'invention concerne une électrode de soudage à l'arc revêtue de type à faible teneur en hydrogène, dont un fil à âme en acier est revêtu d'un agent de revêtement, l'agent de revêtement contenant 8 à 25 % en masse d'un carbonate de métal (en termes de CO2), 2 à 15 % en masse d'un fluorure de métal (en termes de F), un total de 2 à 10 % en masse d'au moins un composé choisi parmi TiO2, ZrO2 et Al2O3, 3 à 12 % en masse de SiO2, 1 à 7 % en masse de Si, 1 à 8 % en masse de Mn, 0,03 à 0,7 % en masse d'un composé de Li (en termes de Li) et un total de 1,0 à 3,5 % en masse d'au moins un composé choisi parmi un composé de Na (en termes de Na) et un composé de K (en termes de K), le reste étant constitué de Fe et des impuretés inévitables ; la composition satisfait la formule numérique (1) ; et le taux de revêtement est de 22 à 45 % en masse.
PCT/JP2014/084438 2014-01-07 2014-12-25 Électrode de soudage à l'arc revêtue de type à faible teneur en hydrogène WO2015105011A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
MYPI2016702453A MY184309A (en) 2014-01-07 2014-12-25 Low-hydrogen type coated arc welding electrode
KR1020167017987A KR101827193B1 (ko) 2014-01-07 2014-12-25 저수소계 피복 아크 용접봉
CN201480072045.8A CN105873717B (zh) 2014-01-07 2014-12-25 低氢系涂药焊条
SG11201604856XA SG11201604856XA (en) 2014-01-07 2014-12-25 Low-hydrogen type coated arc welding electrode

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JP2014001073A JP6216642B2 (ja) 2014-01-07 2014-01-07 低水素系被覆アーク溶接棒
JP2014-001073 2014-01-07

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JP (1) JP6216642B2 (fr)
KR (1) KR101827193B1 (fr)
CN (1) CN105873717B (fr)
MY (1) MY184309A (fr)
SG (1) SG11201604856XA (fr)
WO (1) WO2015105011A1 (fr)

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WO2023080043A1 (fr) * 2021-11-05 2023-05-11 株式会社神戸製鋼所 Baguette de soudage à l'arc revêtue d'alliage à base de ni

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JP6434387B2 (ja) * 2015-09-29 2018-12-05 日鐵住金溶接工業株式会社 低水素系被覆アーク溶接棒
JP6688163B2 (ja) * 2016-06-08 2020-04-28 日鉄溶接工業株式会社 低水素系被覆アーク溶接棒
CN106425161A (zh) * 2016-12-15 2017-02-22 昆山京群焊材科技有限公司 一种适用于焊接后做应力消除处理的50公斤级药芯焊丝
CN106736023A (zh) * 2016-12-15 2017-05-31 昆山京群焊材科技有限公司 一种低氢低烟雾型药芯焊丝
CN106392375A (zh) * 2016-12-15 2017-02-15 昆山京群焊材科技有限公司 一种适用于焊接后做应力消除处理的62公斤级药芯焊丝
CN106425162A (zh) * 2016-12-15 2017-02-22 昆山京群焊材科技有限公司 一种490MPa级高强屈比的药芯焊丝
CN106624446A (zh) * 2016-12-15 2017-05-10 昆山京群焊材科技有限公司 一种490MPa级高强度钢用双气体保护药芯焊丝
CN106736027A (zh) * 2016-12-15 2017-05-31 昆山京群焊材科技有限公司 一种极低碳高纯度的1Cr‑0.5Mo‑V电站铸钢件补焊用药芯焊丝
CN106392362A (zh) * 2016-12-15 2017-02-15 昆山京群焊材科技有限公司 超低氢型酸性药芯焊丝
JP6867811B2 (ja) * 2017-01-16 2021-05-12 株式会社神戸製鋼所 低水素系被覆アーク溶接棒
JP7055731B2 (ja) * 2018-11-13 2022-04-18 日鉄溶接工業株式会社 低水素系被覆アーク溶接棒
CN112247402B (zh) * 2020-10-15 2022-03-22 北京工业大学 一种用于5系铝合金电弧增材填充丝表面纳米涂层的涂料

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CN105665958A (zh) * 2016-03-18 2016-06-15 武汉铁锚焊接材料股份有限公司 一种适用于海洋平台690MPa级齿条钢配套的焊条
WO2023080043A1 (fr) * 2021-11-05 2023-05-11 株式会社神戸製鋼所 Baguette de soudage à l'arc revêtue d'alliage à base de ni
JP7564079B2 (ja) 2021-11-05 2024-10-08 株式会社神戸製鋼所 Ｎｉ基合金被覆アーク溶接棒

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JP2015128779A (ja) 2015-07-16
KR20160092022A (ko) 2016-08-03
MY184309A (en) 2021-03-31
KR101827193B1 (ko) 2018-02-07
CN105873717B (zh) 2018-12-21
SG11201604856XA (en) 2016-07-28
CN105873717A (zh) 2016-08-17
JP6216642B2 (ja) 2017-10-18

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