CN108311814B - Welding material composition for single-side submerged arc automatic welding of soft gasket - Google Patents

Welding material composition for single-side submerged arc automatic welding of soft gasket Download PDF

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CN108311814B
CN108311814B CN201711363879.6A CN201711363879A CN108311814B CN 108311814 B CN108311814 B CN 108311814B CN 201711363879 A CN201711363879 A CN 201711363879A CN 108311814 B CN108311814 B CN 108311814B
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welding
powder
submerged arc
balance
flux
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CN108311814A (en
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刘磊
许承熙
鞠国文
隋毅
陈忠德
朱未
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Shanghai Jiangnan Changxing Shipbuilding Co Ltd
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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
    • B23K35/3053—Fe as the principal constituent
    • B23K35/3073—Fe as the principal constituent with Mn as next major 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
    • B23K35/02—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
    • 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
    • B23K35/362—Selection of compositions of fluxes
    • 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
    • B23K9/186—Submerged-arc welding making use of a consumable electrodes
    • 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
    • B23K9/235—Preliminary treatment

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

Abstract

The invention discloses a welding material composition for single-side submerged arc automatic welding of a soft gasket, which comprises a welding wire, a surface flux and filling powder, wherein the mass ratio of the welding wire to the surface flux to the filling powder is as follows: 0.8-1.1: 1.2-1.6: 1.3-1.7, wherein the welding wire comprises 0.08-0.17% of C, 0.01-0.04% of Si, 1.0-2.5% of Mn, 0.1-0.5% of Cr + Ni, 0.010-0.025% of S, 0.010-0.025% of P and the balance of Fe powder; SiO in surface flux210-20%, MgO 15-35%, TiO25 to 15% of Al2O37 to 20%, 5 to 20% CaO, 0.01 to 0.04% S, 0.01 to 0.04% P, H20.01-0.1% of O, 0.1-0.2% of impurities and the balance of Fe powder; the filler powder contains 0.004-0.01% of C, 0.01-0.4% of Si, 1.0-2.5% of Mn, 2.0-5.0% of Ni, 0.2-1.0% of Mo, 0.02-0.04% of S, 0.02-0.04% of P and the balance of Fe powder. The invention improves the production efficiency by 3-5 times, and reduces the cost by 50-60% compared with the cost of imported similar welding materials.

Description

Welding material composition for single-side submerged arc automatic welding of soft gasket
The invention relates to a divisional application of patent 201710833254.5 welding material composition for single-sided submerged arc automatic welding of soft gasket on day 15 of 09 and 15 in 2017
Technical Field
The invention belongs to the field of high-efficiency welding of ship construction, and particularly relates to a welding material composition for single-side submerged arc automatic welding of a soft gasket, in particular to a submerged arc automatic welding material composition containing a welding wire, a surface flux and filling powder.
Background
With the large-scale tonnage of ships, a large number of segmental construction methods are adopted in the hull construction. In the past, most of ship plates are spliced by CO2The gas shielded welding is called FCAW (flux Cored Arc welding) for short, and the method has the defects of high labor intensity, more consumed working hours, poor quality reliability and the like due to the influence of various factors such as welder skill, welding materials, performance and the like. Meanwhile, as the plate thickness and the joint length of the jointed plates are increased, the weight and the occupied area of the segments are also increased, which brings great difficulty to the turning-over back sealing welding of the segments. Therefore, since the 70 s of the 20 th century, single-side welding technology for achieving single-side welding and double-side forming by using automatic submerged arc welding, such as Flux Backing (RF), brazing filler metal Backing (FCB), and flexible Backing single-side submerged arc welding (FAB for short), was developed in japan in the fields of bridges, shipbuilding, and the like, wherein FAB technology is gradually becoming a mainstream welding process in the middle, day, and korean shipbuilding industries depending on advantages of high welding quality, convenience and flexibility in use, low technical capital investment, and the like.
In recent years, affected by the world financial crisis, international shipping and economy are in a strong concussion period, and in order to shorten the shipbuilding period and reduce the construction cost, the FAB technology is favored by domestic shipbuilding enterprises due to the outstanding technical advantages of the FAB technology, and the requirements on high-efficiency and high-quality welding technology are stronger. However, no welding material matching with the FAB technology is available in China, and the domestic market is always monopolized in japan and korea abroad. For domestic shipyards, the use of imported FAB welding materials has a plurality of problems: firstly, the price is very high; secondly, the purchasing period is longer; and thirdly, after-sale service is not timely and the like. In the aspect of process performance, the existing imported FAB welding material has the condition of lower impact toughness when welding high-strength ship structure steel. Therefore, the development of the FAB welding material is the key for further popularizing the high-efficiency welding method and reducing the production cost.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a welding material composition for single-side submerged arc automatic welding of a soft gasket.
In order to achieve the purpose, the invention adopts the following technical scheme:
a welding material composition for single-sided submerged arc automatic welding of a soft gasket, the composition comprising the following components: the welding wire, the surface flux and the filling powder are as follows according to the mass ratio: 0.8 to 1.1:1.2 to 1.6:1.3 to 1.7,
the welding wire comprises the following components in percentage by mass: 0.08 to 0.17 percent of C, 0.01 to 0.04 percent of Si, 1.0 to 2.5 percent of Mn, 0.1 to 0.5 percent of Cr + Ni, 0.010 to 0.025 percent of S, 0.010 to 0.025 percent of P, and the balance of Fe powder;
the surface welding flux comprises the following components in percentage by mass: SiO 2210-20%, MgO 15-35%, TiO 25 to 15% of Al2O37 to 20%, 5 to 20% CaO, 0.01 to 0.04% S, 0.01 to 0.04% P, H20.01-0.1% of O, 0.1-0.2% of impurities and the balance of Fe powder;
the filling powder comprises the following components in percentage by mass: 0.004 to 0.01% of C, 0.01 to 0.4% of Si, 1.0 to 2.5% of Mn, 2.0 to 5.0% of Ni, 0.2 to 1.0% of Mo, 0.02 to 0.04% of S, 0.02 to 0.04% of P, and the balance of Fe powder.
The mass ratio among the welding wire, the surface flux and the filling powder is as follows: 1:1.5:1.5.
The welding wire comprises the following components in percentage by mass: 0.1-0.15% of C, 0.02-0.03% of Si, 1.5-2.0% of Mn, 0.2-0.4% of Cr + Ni, 0.010-0.020% of S, 0.010-0.020% of P and the balance of Fe powder;
the surface welding flux comprises the following components in percentage by mass: SiO 2215-20%, 15-30% of MgO, and TiO210 to 15% of Al2O3Is 12 ℃20%, CaO 12-18%, S0.02-0.03%, P0.03-0.04%, H20.05-0.08% of O, 0.15-0.2% of impurities and the balance of Fe powder;
the filling powder comprises the following components in percentage by mass: 0.006-0.01% of C, 0.2-0.3% of Si, 1.5-2.0% of Mn, 3.0-4.5% of Ni, 0.2-0.6% of Mo, 0.02-0.03% of S, 0.02-0.03% of P, and the balance of Fe powder.
The welding wire comprises the following components in percentage by mass: 0.17% of C, 0.04% of Si, 2.5% of Mn, 0.5% of Cr + Ni, 0.025% of S, 0.025% of P and the balance of Fe powder;
the surface welding flux comprises the following components in percentage by mass: SiO 2220% of MgO, 35% of TiO215% of Al2O320% of CaO, 0.04% of S, 0.04% of P, and H20.1% of O, 0.2% of impurities and the balance of Fe powder;
the filling powder comprises the following components in percentage by mass: 0.01% of C, 0.4% of Si, 2.5% of Mn, 5.0% of Ni, 1.0% of Mo, 0.04% of S, 0.04% of P and the balance of Fe powder.
The welding wire comprises the following components in percentage by mass: 0.15% of C, 0.03% of Si, 1.5% of Mn, 0.2% of Cr + Ni, 0.010% of S, 0.010% of P and the balance of Fe powder;
the surface welding flux comprises the following components in percentage by mass: SiO 2215% of MgO, 15% of TiO212% of Al2O315% of CaO, 12% of CaO, 0.02% of S, 0.04% of P, and H20.05% of O, 0.15% of impurities and the balance of Fe powder;
the filling powder comprises the following components in percentage by mass: 0.01% of C, 0.3% of Si, 1.5% of Mn, 3.0% of Ni, 0.2% of Mo, 0.02% of S, 0.03% of P and the balance of Fe powder.
The granularity of the surface welding flux is 10-60 meshes.
The particle size of the filling powder is 100-400 meshes.
The mass ratio of Cr to Ni in the Cr + Ni is 1:1.
A method of welding using the welding material composition for soft pad single-sided submerged arc automatic welding of claim 1, comprising the steps of:
step 1, a soft gasket is arranged on the back of a welding seam in a cushioning mode, filling powder is filled in a groove,
step 2, covering the groove with surface welding flux, wherein the groove is completely covered with the surface welding flux,
step 3, extending a welding wire into the filling powder through the surface flux, wherein one end of the welding wire is contacted with the filling powder, the other end of the welding wire is contacted with the surface flux,
and 4, welding by utilizing the principle of submerged arc welding to realize efficient welding of single-side welding and double-side forming.
The groove gap is 0-8 mm, the groove angle α is 45-60 degrees, no truncated edge is left on the groove, and the error is controlled to be 0-2 mm.
Compared with the prior art, the invention has the beneficial effects that: the welding material composition is used for single-side submerged arc automatic welding of the soft gasket, and has the advantages of stable welding arc, attractive weld line forming, smooth transition, no undercut and other welding defects; the combined formula ensures the grain refinement of the weld metal under the large linear energy of 100 KJ/cm; the FAB technology is used for replacing the traditional one-side welding method, so that the production efficiency can be improved by 3-5 times, and meanwhile, the cost of the invention is reduced by 50-60% compared with the cost of imported similar welding materials.
The above composition design is a welding material combination which is developed successfully by a large amount of theoretical analysis and test optimization, reasonably adjusting the distribution ratio according to a large amount of test data, further adjusting the viscosity, the fluidity, the alkalinity, the oxidation-reduction reaction strength and the like of a molten pool, and adding Ti alloy elements to obtain acicular ferrite and further refine weld metal grains so as to ensure the condition of large input of energy.
Drawings
FIG. 1 is a schematic view of the groove welding structure of the present invention.
Detailed Description
Example 1
As shown in fig. 1, the welding material composition for single-sided submerged arc automatic welding of a soft pad of the present embodiment comprises the following components: the welding wire, the surface flux and the filling powder are as follows according to the mass ratio: 1:1.5:1.5,
the welding wire comprises the following components in percentage by mass: 0.15% of C, 0.03% of Si, 2.2% of Mn, 0.1% of Cr + Ni, 0.012% of S, 0.012% of P and the balance of Fe powder;
the surface welding flux comprises the following components in percentage by mass: SiO 2218% of MgO, 30% of TiO210% of Al2O319% of CaO, 18% of CaO, 0.018% of S, 0.018% of P, and H20.03% of O, 0.15% of impurities and the balance of Fe powder;
the filling powder comprises the following components in percentage by mass: 0.008% of C, 0.05% of Si, 1.3% of Mn, 2.6% of Ni, 0.3% of Mo, 0.021% of S, 0.021% of P and the balance of Fe powder.
Preferably, the granularity of the surface welding flux in the embodiment is 25-35 meshes; the particle size of the filling powder is 150-200 meshes.
More preferably, the mass ratio of Cr to Ni in Cr + Ni in this example is 1:1.
The method for welding the welding material composition for the single-sided submerged arc automatic welding of the soft gasket comprises the following steps of:
step 1, a soft gasket 1 is arranged on the back of a welding seam in a cushioning mode, filling powder 3 is filled in a groove 2,
step 2, covering the groove 2 with a surface welding flux 4, completely covering the groove 2 with the surface welding flux 4,
step 3, extending a welding wire 5 into the filling powder 3 through the surface flux 4, wherein one end of the welding wire 5 is in contact with the filling powder 3, the other end of the welding wire 5 is in contact with the surface flux 4,
and 4, welding by utilizing the principle of submerged arc welding to realize efficient welding of single-side welding and double-side forming.
More preferably, in this embodiment, the groove gap is any value of 0mm, 2mm, 5mm, 6mm, 8mm, or 0mm to 8mm, the groove angle α is any value of 45 °, 50 °, 55 °, 60 °, or 45 to 60 °, no blunt edge is left on the groove, and the error is controlled to be 0mm to 2 mm.
Example 2
As shown in fig. 1, the welding material composition for single-sided submerged arc automatic welding of a soft pad of the present embodiment comprises the following components: the welding wire, the surface flux and the filling powder are as follows according to the mass ratio: 1.1:1.5:1.6,
the welding wire comprises the following components in percentage by mass: 0.12% of C, 0.01% of Si, 1.98% of Mn, 0.3% of Cr + Ni, 0.018% of S, 0.018% of P and the balance of Fe powder;
the surface welding flux comprises the following components in percentage by mass: SiO 2214% of MgO, 22% of TiO212% of Al2O316% of CaO, 12% of CaO, 0.012% of S, 0.012% of P, and H20.02% of O, 0.2% of impurities and the balance of Fe powder;
the filling powder comprises the following components in percentage by mass: 0.004% of C, 0.05% of Si, 1.5% of Mn, 2.5% of Ni, 0.9% of Mo, 0.023% of S, 0.023% of P and the balance of Fe powder.
Preferably, the granularity of the surface welding flux in the embodiment is 20-25 meshes; the particle size of the filling powder is 100-150 meshes.
More preferably, the mass ratio of Cr to Ni in Cr + Ni in this example is 1:1.
The method for welding the welding material composition for the single-sided submerged arc automatic welding of the soft gasket comprises the following steps of:
step 1, a soft gasket 1 is arranged on the back of a welding seam in a cushioning mode, filling powder 3 is filled in a groove 2,
step 2, covering the groove 2 with a surface welding flux 4, completely covering the groove 2 with the surface welding flux 4,
step 3, extending a welding wire 5 into the filling powder 3 through the surface flux 4, wherein one end of the welding wire 5 is in contact with the filling powder 3, the other end of the welding wire 5 is in contact with the surface flux 4,
and 4, welding by utilizing the principle of submerged arc welding to realize efficient welding of single-side welding and double-side forming.
More preferably, in this embodiment, the groove gap is any value of 0mm, 2mm, 5mm, 6mm, 8mm, or 0mm to 8mm, the groove angle α is any value of 45 °, 50 °, 55 °, 60 °, or 45 to 60 °, no blunt edge is left on the groove, and the error is controlled to be 0mm to 2 mm.
The performance parameters of the soft pad in the above examples are shown in table 1:
table 1 performance parameters of soft pad
Figure BDA0001512447210000071
Testing a plate: high strength hull structural steel grade: EH36, thickness: 25mm, the chemical composition of which is shown in Table 2.
TABLE 2 chemical composition of EH36 high strength steel for hull construction
Figure BDA0001512447210000072
Welding equipment: schwer MZ-1250 single-electrode submerged arc automatic welding equipment.
Weld specification parameters, see table 3.
TABLE 3 weld Specification parameters
Figure BDA0001512447210000073
The detection result of this embodiment: the weld metal tensile strength, yield strength, elongation and low temperature impact work at-20 ℃ are shown in Table 4.
TABLE 4 weld deposit metal mechanical properties
Figure BDA0001512447210000074
Figure BDA0001512447210000081
As can be seen from Table 3, the invention can obtain deposited metal with excellent mechanical properties by being applied to FAB technical welding, which not only meets the evaluation requirements of 3Y40 grade welding materials in the Material and welding Specification of Chinese classification society, but also has no lower impact toughness condition when similar imported FAB welding materials are used for welding high-strength hull structural steel in the aspect of important research index, namely impact toughness. Meanwhile, in the welding process, the heat input is higher than that of the imported welding material, but the toughness of the welding seam is still better than that of the imported welding material, and the higher heat input means higher welding production efficiency, so that the result shows that the welding production efficiency of the invention is better than that of the imported welding material.
The invention can be applied to the areas of ships, bridges, pressure vessels and other related industries at home and abroad, and the soft liner single-side submerged arc automatic welding technology is applied.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.

Claims (3)

1. A welding material composition for single-sided submerged arc automatic welding of a soft gasket, characterized in that the composition comprises the following components: the welding wire, the surface flux and the filling powder are as follows according to the mass ratio: 1:1.5:1.5, wherein the welding wire comprises the following components in percentage by mass: 0.17% of C, 0.04% of Si, 2.5% of Mn, 0.5% of Cr + Ni, 0.025% of S, 0.025% of P and the balance of Fe powder;
the surface welding flux comprises the following components in percentage by mass: SiO 2220% of MgO, 35% of TiO215% of Al2O320% of CaO, 0.04% of S, 0.04% of P, and H20.1% of O, 0.2% of impurities and the balance of Fe powder;
the filling powder comprises the following components in percentage by mass: 0.01% of C, 0.4% of Si, 2.5% of Mn, 5.0% of Ni, 1.0% of Mo, 0.04% of S, 0.04% of P and the balance of Fe powder;
the granularity of the surface welding flux is 10-60 meshes.
2. The welding material composition for soft pad single-sided submerged arc automatic welding according to claim 1, wherein the particle size of the filler powder is 100-400 mesh.
3. The welding material composition for soft pad one-sided submerged arc automatic welding according to claim 1, wherein the mass ratio of Cr to Ni in the Cr + Ni is 1:1.
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CN108311814B (en) * 2017-09-15 2020-04-21 上海江南长兴造船有限责任公司 Welding material composition for single-side submerged arc automatic welding of soft gasket
TWI677398B (en) * 2018-10-24 2019-11-21 葉均蔚 Welding method using alloy powder as welding filler material
CN109365967B (en) * 2018-10-31 2021-04-06 上海江南长兴造船有限责任公司 Welding method for large groove gap of submerged-arc welding
CN110560849B (en) * 2019-09-05 2021-09-14 广州黄船海洋工程有限公司 Soft gasket single-side submerged arc welding process for EH36 high-strength steel thick plate
CN110640279B (en) * 2019-09-30 2021-10-26 广州黄船海洋工程有限公司 Welding flux copper gasket method submerged-arc welding process for Q420 high-strength steel thick plate

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