CN111203673B - High-toughness metal powder flux-cored welding wire for argon-rich shielded welding - Google Patents
High-toughness metal powder flux-cored welding wire for argon-rich shielded welding Download PDFInfo
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- CN111203673B CN111203673B CN202010032675.XA CN202010032675A CN111203673B CN 111203673 B CN111203673 B CN 111203673B CN 202010032675 A CN202010032675 A CN 202010032675A CN 111203673 B CN111203673 B CN 111203673B
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- argon
- metal powder
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- welding
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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
- B23K35/3073—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
- 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
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
Abstract
The invention provides a high-toughness metal powder flux-cored wire for argon-rich shielded welding, which comprises a steel sheet and a flux core wrapped in the steel sheet, wherein the flux core comprises the following components in percentage by mass: 8-10% of silicon-manganese alloy; 4-5% of ferrosilicon; 4-5% of nickel powder; 1-2% of aluminum magnesium alloy; 0.5-1% of graphite; 0.5-1% of potassium titanate; 2-3% of iron oxide; the balance being iron powder. The raw materials adopted by the invention are cheap and easy to obtain, and the metal powder flux-cored welding wire has excellent welding process performance and deposited metal mechanical property: the yield strength is more than or equal to 460MPa, the tensile strength is 550-740 MPa, the elongation is more than or equal to 22.0%, and Akv is more than or equal to 54J at the temperature of minus 60 ℃.
Description
Technical Field
The invention belongs to the technical field of welding materials, and particularly relates to a high-toughness metal powder flux-cored welding wire for argon-rich shielded welding.
Background
The metal powder flux-cored wire has the characteristics of quick melting and small slag amount, and compared with a solid wire, the metal powder flux-cored wire also has the advantages that the raw materials are easy to purchase, the metal powder flux-cored wire can be produced in small batches and in various types, and some special components can be added, so the comprehensive performance, particularly the low-temperature toughness, of the metal powder flux-cored wire can be far superior to that of the same type of solid wires.
Chinese patent CN102489902A discloses a metal powder type flux-cored wire for welding steel with high impact toughness, but the low-temperature impact toughness of a welding seam is poor, the impact absorption energy of the welding seam at 50 ℃ below zero is only 70J, and expensive molybdenum is used; in addition, since the flux core component uses magnesite which is easy to absorb moisture, it is necessary to add a fluoride which increases unstable spattering of the welding arc.
Chinese patent CN103551758A discloses a high-toughness metal powder type flux-cored wire for nuclear power engineering, but the low-temperature impact toughness of a welding seam is poor, the impact absorption work at the welding seam of-20 ℃ is only 85J, and expensive molybdenum is used.
Chinese patent CN106392374A discloses a metal powder type flux-cored wire for Q690 low-temperature high-strength steel, although the impact absorption power at the welding seam of-60 ℃ can reach more than 50J, the phosphorus content of the adopted steel strip is required to be as low as 0.005-0.010, dephosphorization in steel smelting is very difficult, and the dephosphorization can be realized only by complex and expensive process flows, and the actual phosphorus content of the existing commercially available steel strip is more than 0.010, so the technology is very difficult to realize, and the cost is high.
Chinese patent CN107081537A discloses a metal powder cored flux-cored wire for high-speed welding of engineering machinery and a welding method thereof, wherein the described metal powder cored flux-cored wire welds and absorbs the power KV at the temperature of-60 ℃ in impact2Not less than 50J, but 4-6% of ferroboron is used in the powder core, and boron is a strengthening element at the same time, so that the welding seam is easy to crack; expensive molybdenum is also used.
Chinese patent CN 108672977a discloses a metal powder cored flux cored wire for additive manufacturing and a welding method thereof, wherein expensive molybdenum element and rare earth element are used, and Ti-B is used as a low temperature toughening technique, but the impact absorption power at-50 ℃ of the weld is preferably only 79J. The scheme also contains more slag-forming components, such as rutile, anhydrous feldspar, sodium fluoride, rare earth fluoride and the like, and the slag amount of the slag-forming components is far more than that of the common metal powder flux-cored wire.
Disclosure of Invention
The invention aims to solve the problems of expensive raw materials, high manufacturing cost and low-temperature impact absorption power of a welding seam of the conventional metal powder flux-cored wire.
Therefore, the invention provides a high-toughness argon-rich gas shielded welding metal powder flux-cored wire, which comprises a steel sheet and a flux core wrapped in the steel sheet, wherein the flux core comprises the following components in percentage by mass: 8-10% of silicon-manganese alloy; 4-5% of ferrosilicon; 4-5% of nickel powder; 1-2% of aluminum magnesium alloy; 0.5-1% of graphite; 0.5-1% of potassium titanate; 2-3% of iron oxide; the balance being iron powder.
Further, the filling rate of the medicine core is 20-25%.
Further, the silicon-manganese alloy comprises the following chemical components in percentage by mass: more than or equal to 22.0 percent of Si, more than or equal to 63.0 percent of Mn, 1.0-1.5 percent of C, and the balance of iron and inevitable impurities.
Further, the Si content in the ferrosilicon is 35.0-45.0% by mass.
Further, the mass percent of Al in the aluminum magnesium alloy is 50.0-60.0%, and the mass percent of Mg in the aluminum magnesium alloy is 40.0-50.0%.
Further, the iron oxide is one or a mixture of several of ferrous oxide, ferric oxide and ferroferric oxide.
As one embodiment, the drug core comprises the following components in percentage by mass: 10% of silicon-manganese alloy; 5% of ferrosilicon; 5% of nickel powder; 2% of aluminum magnesium alloy; 0.5% of graphite; 1% of potassium titanate; 3% of iron oxide; the balance being iron powder.
As one embodiment, the drug core comprises the following components in percentage by mass: 9% of silicon-manganese alloy; 5% of ferrosilicon; 4% of nickel powder; 1% of aluminum magnesium alloy; 1% of graphite; 0.5 percent of potassium titanate; 2.5% of iron oxide; the balance being iron powder.
As one embodiment, the drug core comprises the following components in percentage by mass: 8% of silicon-manganese alloy; 4.5 percent of ferrosilicon; 4.5 percent of nickel powder; 1.5% of aluminum magnesium alloy; 0.8% of graphite; 0.8 percent of potassium titanate; 2% of iron oxide; the balance being iron powder.
As one embodiment, the drug core comprises the following components in percentage by mass: 8.5 percent of silicon-manganese alloy; 4% of ferrosilicon; 5% of nickel powder; 2% of aluminum magnesium alloy; 0.8% of graphite; 0.7 percent of potassium titanate; 2% of iron oxide; the balance being iron powder.
The formula design principle of the metal powder-flux-cored welding wire for the high-toughness argon-rich shielded welding is as follows:
in order to ensure that the welding seam performance of the metal powder flux-cored welding wire for argon-rich shielded welding reaches-60 ℃ and the impact absorption work Akv is more than or equal to 54J, a proper amount of aluminum-magnesium alloy is adopted for deoxidation, and trace Ti is obtained by aluminum reduction of potassium titanate to achieve the effect of refining crystal grains, and meanwhile, iron oxide is added to promote magnesium in the aluminum-magnesium alloy to be oxidized to form fine high-melting-point spherical inclusions, so that the effect of increasing the crystallization nucleation of a molten pool is achieved, the number of the crystallization nucleation is obviously increased, and the crystal grains are prevented from growing so as to achieve the purpose of refining the crystal grains.
Alloying the silicomanganese alloy and the ferrosilicon into the welding line to ensure that the yield strength and the tensile strength of the welding line meet the requirements of corresponding indexes; the graphite participates in a deoxidation reaction, reduces the oxygen content of the welding line and transfers part of carbon into the welding line, and increases the yield strength and the tensile strength; the nickel powder can improve the low-temperature toughness of the welding line; the iron powder will enhance the stability of the welding arc and increase the melting speed.
Compared with the prior art, the invention has the beneficial effects that:
the raw materials adopted by the high-toughness argon-rich gas shielded welding metal powder-cored welding wire provided by the invention are cheap and easy to obtain, and the metal powder-cored welding wire has excellent welding process performance and deposited metal mechanical property: the yield strength is more than or equal to 460MPa, the tensile strength is 550-740 MPa, the elongation is more than or equal to 22.0%, and Akv is more than or equal to 54J at the temperature of minus 60 ℃.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The high-toughness metal powder flux-cored wire for argon-rich shielded welding is prepared by adopting a conventional flux-cored wire manufacturing process, the steel strip sheath adopts an SPCC steel strip, and the formula of a flux core is shown in Table 1.
Table 1: metal powder flux-cored welding wire formula (mass percent)
| Examples | Silicon-manganese alloy | Silicon iron | Nickel powder | Aluminum magnesium alloy | Graphite | Potassium titanate | Iron oxide | Iron powder | Filling rate |
| -- | 8-10 | 4-5 | 4-5 | 1-2 | 0.5-1.0 | 0.5-1 | 2-3 | Balance of | 20-25 |
| 1 | 10 | 5 | 5 | 2 | 0.5 | 1 | 3 | 73.5 | 20 |
| 2 | 9 | 5 | 4 | 1 | 1 | 0.5 | 2.5 | 77 | 25 |
| 3 | 8 | 4.5 | 4.5 | 1.5 | 0.8 | 0.8 | 2 | 77.9 | 23 |
| 4 | 8.5 | 4 | 5 | 2 | 0.8 | 0.7 | 2 | 77 | 21 |
The metal powder flux-cored wire of the corresponding embodiment is matched with argon-rich gas (80% Ar + 20% CO)2) The mechanical properties of the deposited metal of the metal powder flux-cored wire of the corresponding embodiment after welding are protected are shown in table 2.
Table 2: mechanical properties of deposited metal
As can be seen from Table 2, the metal powder flux-cored wire of the present invention80% Ar and 20% CO were used2The argon-rich shielding gas welding has the comprehensive properties of deposited metal and welding joints: the yield strength is more than or equal to 460 MPa; the tensile strength is 550-740 MPa; the elongation is more than or equal to 22 percent; akv is more than or equal to 54J at the temperature of minus 60 ℃.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. A high-toughness metal powder flux-cored wire for argon-rich shielded welding comprises a steel sheet and a flux core wrapped in the steel sheet, and is characterized in that the flux core comprises the following components in percentage by mass: 8-10% of silicon-manganese alloy; 4-5% of ferrosilicon; 4-5% of nickel powder; 1-2% of aluminum magnesium alloy; 0.5-1% of graphite; 0.5-1% of potassium titanate; 2-3% of iron oxide; the balance being iron powder.
2. The high toughness argon-rich gas shielded welding metal powder-cored welding wire of claim 1, wherein the filling rate of said flux core is 20-25%.
3. The high-toughness metal powder-cored welding wire for the argon-rich gas shielded welding as claimed in claim 1, wherein the silicon-manganese alloy comprises the following chemical components in percentage by mass: more than or equal to 22.0 percent of Si, more than or equal to 63.0 percent of Mn, 1.0-1.5 percent of C, and the balance of iron and inevitable impurities.
4. The high-toughness argon-rich flux-cored wire for shielded welding as claimed in claim 1, wherein Si is contained in said ferrosilicon in an amount of 35.0 to 45.0% by mass.
5. The high toughness metal powder-cored welding wire for argon-rich arc welding of claim 1, wherein Al content in said Al-Mg alloy is 50.0-60.0% by mass, and Mg content is 40.0-50.0% by mass.
6. The high toughness argon-rich flux cored wire for shielded welding as defined in claim 1, wherein said iron oxide is one or more selected from the group consisting of ferrous oxide, ferric oxide, and ferroferric oxide.
7. The high-toughness argon-rich gas shielded welding metal powder-cored welding wire of claim 1, wherein the flux core comprises the following components in percentage by mass: 10% of silicon-manganese alloy; 5% of ferrosilicon; 5% of nickel powder; 2% of aluminum magnesium alloy; 0.5% of graphite; 1% of potassium titanate; 3% of iron oxide; the balance being iron powder.
8. The high-toughness argon-rich gas shielded welding metal powder-cored welding wire of claim 1, wherein the flux core comprises the following components in percentage by mass: 9% of silicon-manganese alloy; 5% of ferrosilicon; 4% of nickel powder; 1% of aluminum magnesium alloy; 1% of graphite; 0.5 percent of potassium titanate; 2.5% of iron oxide; the balance being iron powder.
9. The high-toughness argon-rich gas shielded welding metal powder-cored welding wire of claim 1, wherein the flux core comprises the following components in percentage by mass: 8% of silicon-manganese alloy; 4.5 percent of ferrosilicon; 4.5 percent of nickel powder; 1.5% of aluminum magnesium alloy; 0.8% of graphite; 0.8 percent of potassium titanate; 2% of iron oxide; the balance being iron powder.
10. The high-toughness argon-rich gas shielded welding metal powder-cored welding wire of claim 1, wherein the flux core comprises the following components in percentage by mass: 8.5 percent of silicon-manganese alloy; 4% of ferrosilicon; 5% of nickel powder; 2% of aluminum magnesium alloy; 0.8% of graphite; 0.7 percent of potassium titanate; 2% of iron oxide; the balance being iron powder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010032675.XA CN111203673B (en) | 2020-01-13 | 2020-01-13 | High-toughness metal powder flux-cored welding wire for argon-rich shielded welding |
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| CN202010032675.XA CN111203673B (en) | 2020-01-13 | 2020-01-13 | High-toughness metal powder flux-cored welding wire for argon-rich shielded welding |
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| CN111203673B true CN111203673B (en) | 2021-12-28 |
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| CN101658987A (en) * | 2009-09-14 | 2010-03-03 | 山东中创钢构有限公司 | Flux-cored wire |
| CN106695170A (en) * | 2016-12-14 | 2017-05-24 | 安徽华众焊业有限公司 | Gas-shielded flux-cored welding wire for welding stainless steel |
| CN106736001A (en) * | 2016-12-14 | 2017-05-31 | 安徽华众焊业有限公司 | High tenacity flux-cored wire for electrogas arc welding |
| CN107081537A (en) * | 2017-03-20 | 2017-08-22 | 武汉铁锚焊接材料股份有限公司 | A kind of engineering machinery High Speed Welding metal powder-cored wire and its welding method |
| CN109317862A (en) * | 2018-11-12 | 2019-02-12 | 西安理工大学 | 25CrNiMoV gas shielded type flux-cored wire and preparation method thereof |
| CN110253172A (en) * | 2019-07-14 | 2019-09-20 | 新乡市和光科技有限公司 | A kind of high-strength steel Ar-CO2Metal powder core solder wire used for gas shield welding |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9707643B2 (en) * | 2012-04-17 | 2017-07-18 | Hobart Brothers Company | Systems and methods for welding electrodes |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101658987A (en) * | 2009-09-14 | 2010-03-03 | 山东中创钢构有限公司 | Flux-cored wire |
| CN106695170A (en) * | 2016-12-14 | 2017-05-24 | 安徽华众焊业有限公司 | Gas-shielded flux-cored welding wire for welding stainless steel |
| CN106736001A (en) * | 2016-12-14 | 2017-05-31 | 安徽华众焊业有限公司 | High tenacity flux-cored wire for electrogas arc welding |
| CN107081537A (en) * | 2017-03-20 | 2017-08-22 | 武汉铁锚焊接材料股份有限公司 | A kind of engineering machinery High Speed Welding metal powder-cored wire and its welding method |
| CN109317862A (en) * | 2018-11-12 | 2019-02-12 | 西安理工大学 | 25CrNiMoV gas shielded type flux-cored wire and preparation method thereof |
| CN110253172A (en) * | 2019-07-14 | 2019-09-20 | 新乡市和光科技有限公司 | A kind of high-strength steel Ar-CO2Metal powder core solder wire used for gas shield welding |
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| CN111203673A (en) | 2020-05-29 |
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