CN112453756A - High-strength and high-toughness gas-shielded flux-cored wire - Google Patents
High-strength and high-toughness gas-shielded flux-cored wire Download PDFInfo
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- CN112453756A CN112453756A CN202011305098.3A CN202011305098A CN112453756A CN 112453756 A CN112453756 A CN 112453756A CN 202011305098 A CN202011305098 A CN 202011305098A CN 112453756 A CN112453756 A CN 112453756A
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Classifications
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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
- B23K35/3066—Fe as the principal constituent with Ni 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
- 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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3608—Titania or titanates
-
- 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
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention provides a high-strength and high-toughness gas-shielded flux-cored wire, which comprises powder and a steel belt coated on the outer side of the powder, wherein the powder comprises the following components in percentage by weight: TiO 22:20‑40％，SiO2:2‑7％,ZrO22-6 percent of fluoride, 2-5 percent of MgO, 2-6 percent of ferromanganese alloy: 10-20%, ferrosilicon alloy: 3-8%, 1-5% of ferrotitanium alloy, and the weight ratio of ferroboron alloy: 1-6%, metallic nickel: 2-6%, rare earth alloy: 1.0-3.0%, magnesium powder: 1-5% and the balance of iron powder. The welding wire has excellent comprehensive mechanical properties of weld metal, particularly high low-temperature impact toughness, and the low-temperature impact toughness value is more than 120J.
Description
Technical Field
The invention relates to the technical field of welding materials, in particular to a high-strength and high-toughness gas shielded flux-cored wire.
Background
Along with the development of the building and ship industries in China, the manufacturing level of bridges and ships is greatly improved, low-alloy high-strength steel has the advantages of excellent low-temperature impact toughness and high-strength steel, so that the material consumption can be reduced, the structural weight is reduced, the structural safety is improved, and the like, and is widely applied to the fields of bridge construction, ship manufacturing and the like, particularly, the impact value is required to be not lower than 47J and is improved to be not lower than 120J when the standard of bridge steel is revised, and related flux-cored wire products need to keep pace with the development of the times as the use amount of the steel is gradually increased.
Disclosure of Invention
In view of the above, the present invention is directed to a high strength and high toughness gas shielded flux-cored wire, which has excellent comprehensive mechanical properties of the weld metal, especially has very high low temperature impact toughness, and the low temperature impact toughness is above 120J.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a high-strength and high-toughness gas shielded flux-cored wire comprises powder and a steel strip coated on the outer side of the powder, wherein the steel strip comprises the following chemical components in percentage by weight: c: 0.01-0.04%, Mn: 0.19 to 0.26 percent of Fe, less than or equal to 0.03 percent of Si, less than or equal to 0.010 percent of S, less than or equal to 0.015 percent of P, 0.010 to 0.045 percent of Als, less than or equal to 0.003 percent of Ca, less than or equal to 0.005 percent of N, and the balance of Fe and inevitable impurities; the medicinal powder comprises the following components in percentage by weight:TiO2:20-40％,，SiO2:2-7％,ZrO22-6 percent of fluoride, 2-5 percent of MgO, 2-6 percent of ferromanganese alloy: 10-20%, ferrosilicon alloy: 3-8%, 1-5% of ferrotitanium alloy, and the weight ratio of ferroboron alloy: 1-6%, metallic nickel: 2-6%, rare earth alloy: 1.0-3.0%, magnesium powder: 1-5% and the balance of iron powder.
Further, the medicinal powder comprises the following components in percentage by weight: TiO 22:34％,，SiO2:4％,ZrO22%, 2.5% of fluoride, 3% of MgO, and ferromanganese alloy: 15%, ferrosilicon alloy: 4.7%, ferrotitanium 2.3%, ferroboron: 2.2%, metallic nickel: 3%, rare earth alloy: 1.0%, magnesium powder: 3.5 percent and iron powder 22.8 percent.
Further, the medicinal powder comprises the following components in percentage by weight: TiO 22:35％,，SiO2:3％,ZrO22.5 percent, 3 percent of fluoride, 3.6 percent of MgO, and ferromanganese alloy: 14.6%, ferrosilicon alloy: 5.2%, ferrotitanium 2.2%, ferroboron: 2.0%, metallic nickel: 3.2%, rare earth alloy: 1.5%, magnesium powder: 3.2 percent and 21 percent of iron powder.
Further, the medicinal powder comprises the following components in percentage by weight: TiO 22:36％,，SiO2:2.5％,ZrO24%, 2.8% of fluoride, 3.5% of MgO, and manganese-iron alloy: 14%, ferrosilicon alloy: 5.3%, ferrotitanium 2.5%, ferroboron: 2.0%, metallic nickel: 2.8%, rare earth alloy: 2.5%, magnesium powder: 3.4 percent and 18.7 percent of iron powder.
Further, the medicinal powder comprises the following components in percentage by weight: TiO 22:34％,，SiO2:3％,ZrO23 percent, 3.2 percent of fluoride, 4.0 percent of MgO, and manganese-iron alloy: 15%, ferrosilicon alloy: 4.2%, ferrotitanium 2.6%, ferroboron: 2.1%, metallic nickel: 3.0%, rare earth alloy: 1.5%, magnesium powder: 3.1 percent and 21.3 percent of iron powder.
The invention also provides a preparation method of the high-strength and high-toughness gas-shielded flux-cored wire, which comprises the following steps:
1) preparing medicinal powder according to a proportion, and baking the medicinal powder;
2) mixing the baked medicinal powder, and stirring;
3) cutting the steel belt;
4) conveying the medicinal powder and the steel strip to a forming machine for rolling production and drawing;
5) and carrying out vacuum packaging on the finished welding wire.
The welding wire of the invention adopts CO2The gas protection mode is used for welding low-carbon steel and low-alloy steel of 55 kg grade, such as: q420, Q460, etc., can be used in bridge, shipping, building, ocean engineering, etc.
Compared with the prior art, the high-strength and high-toughness gas-shielded flux-cored wire has the following advantages:
1. the welding wire can meet the welding requirement of high-strength and high-toughness steel.
2. The welding wire has the advantages of excellent welding process, stable electric arc, less splashing and attractive appearance, and can be used for all-position welding.
3. The titanium and boron elements of the weld metal are reasonably matched, and meanwhile, the rare earth elements are added, so that the weld metal has excellent low-temperature impact toughness and lower diffusible hydrogen content.
4. CO is adopted in the welding process2The gas protection, user's use cost is cheap.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to examples.
Examples
A high-strength and high-toughness gas shielded flux-cored wire comprises powder and a steel belt coated outside the powder; the steel strip comprises the following chemical components in percentage by weight: c: 0.01-0.04%, Mn: 0.19 to 0.26 percent of Fe, less than or equal to 0.03 percent of Si, less than or equal to 0.010 percent of S, less than or equal to 0.015 percent of P, 0.010 to 0.045 percent of Als, less than or equal to 0.003 percent of Ca, less than or equal to 0.005 percent of N, and the balance of Fe and inevitable impurities.
The mass fraction of the prepared welding wire powder is shown in the following table 1:
TABLE 1 welding wire powder mass fraction table
Preparing the welding wire of the invention:
1) preparing medicinal powder according to a proportion, and baking the medicinal powder;
2) mixing the baked medicinal powder, and stirring;
3) selecting the steel belt with the components, and cutting the steel belt to a proper size;
4) conveying the medicinal powder and the steel strip to a forming machine for rolling production; drawing the rolled semi-finished product to a required size according to requirements;
5) and carrying out vacuum packaging on the finished welding wire.
The mechanical properties of the flux-cored wires prepared in examples 1 to 4 are shown in Table 2.
TABLE 2 mechanical Property of flux-cored wire
Deposited metal with impact of more than 120J at-40 ℃.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A high-strength and high-toughness gas shielded flux-cored wire is characterized in that: the steel strip comprises medicine powder and a steel strip coated on the outer side of the medicine powder, wherein the steel strip comprises the following chemical components in percentage by weight: c: 0.01-0.04%, Mn: 0.19 to 0.26 percent of Fe, less than or equal to 0.03 percent of Si, less than or equal to 0.010 percent of S, less than or equal to 0.015 percent of P, 0.010 to 0.045 percent of Als, less than or equal to 0.003 percent of Ca, less than or equal to 0.005 percent of N, and the balance of Fe and inevitable impurities; the medicinal powder comprises the following components in percentage by weight: TiO 22:20-40％,，SiO2:2-7％,ZrO22-6 percent of fluoride, 2-5 percent of MgO, 2-6 percent of ferromanganese alloy: 10-20%, ferrosilicon alloy: 3-8%, 1-5% of ferrotitanium alloy, and the weight ratio of ferroboron alloy: 1-6%, metallic nickel: 2-6%, rare earth alloy: 1.0-3.0%, magnesium powder: 1-5% and the balance of iron powder.
2. The high strength, high toughness gas shielded flux cored welding wire of claim 1, wherein: the medicinal powder comprises the following components in percentage by weight: TiO 22:34％,，SiO2:4％,ZrO22%, 2.5% of fluoride, 3% of MgO, and ferromanganese alloy: 15%, ferrosilicon alloy: 4.7%, ferrotitanium 2.3%, ferroboron: 2.2%, metallic nickel: 3%, rare earth alloy: 1.0%, magnesium powder: 3.5 percent and iron powder 22.8 percent.
3. The high strength, high toughness gas shielded flux cored welding wire of claim 1, wherein: the medicinal powder comprises the following components in percentage by weight: TiO 22:35％,，SiO2:3％,ZrO22.5 percent, 3 percent of fluoride, 3.6 percent of MgO, and ferromanganese alloy: 14.6%, ferrosilicon alloy: 5.2%, ferrotitanium 2.2%, ferroboron: 2.0%, metallic nickel: 3.2%, rare earth alloy: 1.5%, magnesium powder: 3.2 percent and 21 percent of iron powder.
4. The high strength, high toughness gas shielded flux cored welding wire of claim 1, wherein: the medicinal powder comprises the following components in percentage by weight: TiO 22:36％,，SiO2:2.5％,ZrO24%, 2.8% of fluoride, 3.5% of MgO, and manganese-iron alloy: 14%, ferrosilicon alloy: 5.3%, ferrotitanium 2.5%, ferroboron: 2.0%, metallic nickel: 2.8%, rare earth alloy: 2.5%, magnesium powder: 3.4 percent and 18.7 percent of iron powder.
5. The high strength, high toughness gas shielded flux cored welding wire of claim 1, wherein: the medicinal powder comprises the following components in percentage by weight: TiO 22:34％,，SiO2:3％,ZrO23 percent, 3.2 percent of fluoride, 4.0 percent of MgO, and manganese-iron alloy: 15%, ferrosilicon alloy: 4.2%, ferrotitanium 2.6%, ferroboron: 2.1%, metallic nickel: 3.0%, rare earth alloy: 1.5%, magnesium powder: 3.1 percent and 21.3 percent of iron powder.
6. A method of making a high strength, high toughness gas shielded flux cored welding wire as defined in any one of claims 1 to 5, wherein: the method comprises the following steps:
1) preparing medicinal powder according to a proportion, and baking the medicinal powder;
2) mixing the baked medicinal powder, and stirring;
3) cutting the steel belt;
4) conveying the medicinal powder and the steel strip to a forming machine for rolling production and drawing;
5) and carrying out vacuum packaging on the finished welding wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011305098.3A CN112453756B (en) | 2020-11-19 | 2020-11-19 | High-strength and high-toughness gas-shielded flux-cored wire |
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| CN202011305098.3A CN112453756B (en) | 2020-11-19 | 2020-11-19 | High-strength and high-toughness gas-shielded flux-cored wire |
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| CN112453756A true CN112453756A (en) | 2021-03-09 |
| CN112453756B CN112453756B (en) | 2022-11-29 |
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| CN109822258A (en) * | 2019-01-23 | 2019-05-31 | 洛阳双瑞特种合金材料有限公司 | A kind of low-temperature steel LPG ship flux-cored wire used for submerged arc welding |
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2020
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| CN112453756B (en) | 2022-11-29 |
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