CN111618474B - Impact-resistant and wear-resistant self-protection flux-cored wire - Google Patents
Impact-resistant and wear-resistant self-protection flux-cored wire Download PDFInfo
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- CN111618474B CN111618474B CN202010484816.1A CN202010484816A CN111618474B CN 111618474 B CN111618474 B CN 111618474B CN 202010484816 A CN202010484816 A CN 202010484816A CN 111618474 B CN111618474 B CN 111618474B
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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
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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
- B23K35/02—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
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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
- B23K35/36—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
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Abstract
The invention provides an impact-resistant and wear-resistant self-protection flux-cored wire, which comprises a cold-rolled low-carbon steel strip and powder, wherein the powder comprises the following components in percentage by mass of the total mass of the flux-cored wire: 30-38% of high-carbon ferrochrome powder, 1.7-2.5% of high-carbon ferromanganese powder, 4.5-5.5% of ferroboron powder, 0.5-1.5% of ferromolybdenum powder, 0-0.5% of nickel powder, 1-2% of microlite ink powder, 0.5-1.5% of rare earth elements, 0.2-0.5% of bismuth oxide and 1-2% of calcium silicate powder. The flux-cored wire has the advantages of simple formula, high deposition efficiency, high melting speed of a molten pool and extremely high wear resistance.
Description
Technical Field
The invention belongs to the technical field of metal material surface repair, relates to a flux-cored wire, and particularly relates to an impact-resistant and wear-resistant self-protection flux-cored wire.
Background
The special welding wire for the wear-resisting plate is suitable for chutes, sieve plates, conveying channels, pipelines, wear-resisting lining plates, fan shells, sheaths, storage bins, bushings and the like in the environment of moderate impact and high wear, and the application temperature range is not more than 350 ℃.
In general, the wear-resistant self-protection flux-cored wire mostly uses magnesium powder, aluminum powder, fluorite and other raw materials as a deoxidizer and a slag former. Fluorite is used as a strong diluent, so that gas in a welding seam can easily escape, and if fluorite is added into a slag forming agent alone, the problems that the slag is too thin and the welding seam cannot be covered can occur; fluorite, which can desulfurize and react with hydrogen to form HF, can improve dehydrogenation performance and reduce hydrogen pore sensitivity, but F-Belongs to a strong ionization element and destroys the stability of electric arc. Aluminum is one of strong deoxidizing elements, so aluminum is used as a deoxidizing agent, but aluminum is used for deoxidizing, and the generated Al2O3The high melting point (about 2050 ℃) exists in a molten pool in a solid state, welding seam slag inclusion is easy to cause, meanwhile, welding wires containing aluminum are easy to splash, and the heat cracking resistance of welding seam metal is reduced due to the high content of aluminum.
CN 101934443A discloses self-protection powder core welding wire for wear-resisting plate build-up welding, powder core component mass percent scope as follows: 41-43% of high-carbon ferrochromium, 15-17% of low-carbon chromium, 6-8% of high-carbon ferromanganese, 5-7% of 45# ferrosilicon, 5-6% of ferroboron, 3-4% of ferroniobium, 2-3% of ferromolybdenum, 2-3% of ferrotungsten, 1-2% of ferrotitanium, 4-5% of graphite powder, 2-3% of potassium carbonate, 2-3% of titanium dioxide and 3-5% of nano additive. The self-protection powder-cored welding wire can be directly overlaid without adding any welding flux and protective gas, the nano additive can effectively refine deposited metal grains, the bonding strength is increased, the forming performance is improved, and the welding dilution rate of the wear-resisting plate is reduced. However, the number of the components is as high as 13, the formula is complex, the production process is complicated, and the cost is high.
CN 110682032A discloses a self-protection hard-face surfacing flux-cored wire repaired by a cement squeeze roll, which comprises a flux core and a low-carbon quenched and tempered steel belt coated on the outer side of the flux core, wherein the flux core accounts for 45-55% of the total weight of the wire; the medicine core comprises the following components in percentage by weight: 50-70% of high-carbon ferrochrome, 2-5% of graphite, 1-5% of silicon additive, 1-5% of manganese additive, 5-20% of niobium additive, 0-7% of ferromolybdenum, 2-5% of ferrovanadium, 0-5% of nickel powder, 0.5-3% of arc stabilizer, 0.5-5% of boron additive, 1-10% of titanium additive and 1-10% of rare earth additive. The alloy component content in the final surfacing metal is controlled by the powder components and the content of the powder components, the shape and distribution of a hard phase are improved, the abrasive wear resistance of the squeeze roller is improved, the process performance of the open arc self-protection surfacing flux-cored wire is optimized, and the surfacing spatter and smoke dust are reduced. However, the number of the components is as high as 12, the formula is complex, the production process is complicated, and the cost is increased.
Disclosure of Invention
In order to solve the technical problems in the prior art, the application provides an impact-resistant and wear-resistant self-protection flux-cored wire, which has the advantages of simple formula, high deposition efficiency, high melting bath melting speed and extremely high wear resistance.
In order to achieve the technical effect, the following technical scheme is adopted in the application:
the invention provides an impact-resistant and wear-resistant self-protection flux-cored wire, which comprises a cold-rolled low-carbon steel strip and powder, wherein the powder comprises the following components in percentage by mass of the total mass of the flux-cored wire: 30-38% of high-carbon ferrochrome powder, 1.7-2.5% of high-carbon ferromanganese powder, 4.5-5.5% of ferroboron powder, 0.5-1.5% of ferromolybdenum powder, 0-0.5% of nickel powder, 1-2% of microlite ink powder, 0.5-1.5% of rare earth elements, 0.2-0.5% of bismuth oxide and 1-2% of calcium silicate powder.
Wherein the high carbon ferrochrome powder may be 31%, 32%, 33%, 34%, 35%, 36%, 37%, etc., the high carbon ferromanganese powder may be 1.8%, 1.9%, 2.0%, 2.1%, 2.2%, 2.3%, 2.4%, etc., the ferroboron powder may be 4.6%, 4.7%, 4.8%, 4.9%, 5.0%, 5.1%, 5.2%, 5.3%, 5.4%, etc., the ferromolybdenum powder may be 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, etc., the microcrystalline graphite powder may be 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, etc., the rare earth element may be 0.6%, 0.7%, 1.8%, 1.9%, 0.9%, 1.1.2%, 1.3%, 1.4%, etc., the rare earth element may be 0%, 0.6%, 1.2%, 1.3%, 1.4%, 0.4%, 0%, 0.9%, 0%, 1.2%, 1.4%, 3%, 1.4%, etc., the rare earth element may be 0%, 0.25%, etc., the rare earth element may be 0%, etc., the rare earth element may be 0.6%, 1.8%, 1.25%, etc., the rare earth element may be 0%, etc., the element may be added, 0.3%, 0.35%, 0.4%, 0.45%, etc., and the percentage by mass of the calcium silicate powder may be 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, etc., but it is not limited to the recited values, and other values not recited in the above numerical ranges are also applicable.
In the invention, B element, rare earth element, graphite and calcium silicate powder are added while the content of Cr, Ni, Mo and other basic metal elements is ensured.
B exists as interstitial atoms and can directly form boride through interaction with alloy elements; boron can also shift the eutectic point of the high-chromium alloy to the left, is favorable for generating a primary phase, replaces part of carbon, and is dissolved in M in a solid manner3C，M7C3And M23C6In the carbide matrix, the C-B composite hard phase is synthesized in situ, so that the abrasion is mainly carried out by micro-cutting of abrasive particles. In addition, the solid solution amount of boron in the iron matrix is small, and boron generally gathers near the grain boundary and plays a role in strengthening the grain boundaryThe function of (1).
In the present invention, the rare earth element can promote M7C3Heterogeneous nucleation of carbides allows for uniform distribution of carbides, thereby enhancing the resistance of the hardfacing alloy to plastic deformation and scratching during wear.
Graphite and alloy elements can form carbide at the welding temperature, so that the hardness and the wear resistance of the surfacing alloy are improved. The graphite has strong oxidizability at high temperature of the welding arc, forms CO gas after oxidation, and can be used as protective gas of a welding pool. The graphite is a strong deoxidizer at high temperature, so that the transition of alloy elements can be ensured, and in addition, the deoxidation reaction of the graphite can generate a large amount of heat, thereby being beneficial to the thermal ionization of metal and improving the arc striking and stabilizing performances of the welding wire.
In the present invention, the silico-calcium powder is used as calcium additive, deoxidant, desulfurizing agent and modifier for non-metal inclusion in steel industry. In the invention, a proper amount of calcium silicate powder is added to increase the contents of calcium element and silicon element in the welding wire, especially calcium, which not only has strong affinity with oxygen, but also has strong affinity with sulfur and nitrogen, thereby playing roles of deoxidation and desulfurization. And the silicon-oxygen product is easy to float and remove, so that the possibility of welding defects such as air holes, slag inclusion and the like in the welding layer is reduced.
In the invention, the low-carbon cold-rolled steel strip is a common raw material of the flux-cored wire in the field, so the specific composition of the low-carbon cold-rolled steel strip is not described herein.
As a preferable technical scheme of the invention, the carbon content of the high-carbon ferrochrome powder is 6-10 wt%, the chromium content is 65-75 wt%, preferably the carbon content is 8 wt%, and the chromium content is 70 wt%.
The carbon content may be 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, or 9.5 wt%, and the chromium content may be 66 wt%, 67 wt%, 68 wt%, 69 wt%, 70 wt%, 71 wt%, 72 wt%, 73 wt%, or 74 wt%, but is not limited to the recited values, and other values not recited in the above-mentioned ranges of values are also applicable.
As a preferable technical scheme of the invention, the carbon content of the high-carbon ferromanganese alloy powder is 6-10 wt%, the manganese content is 70-80 wt%, preferably the carbon content is 8 wt%, and the manganese content is 75 wt%.
The content of carbon may be 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, or 9.5 wt%, etc., and the content of manganese may be 71 wt%, 72 wt%, 73 wt%, 74 wt%, 75 wt%, 76 wt%, 77 wt%, 78 wt%, or 79 wt%, etc., but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
In a preferred embodiment of the present invention, the content of boron in the ferroboron powder is 15 to 25 wt%, such as 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt%, 21 wt%, 22 wt%, 23 wt%, or 24 wt%, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable, and preferably 20 wt%.
In a preferred embodiment of the present invention, the content of molybdenum in the roughcast iron powder is 55 to 65 wt%, such as 56 wt%, 57 wt%, 58 wt%, 59 wt%, 60 wt%, 61 wt%, 62 wt%, 63 wt%, or 64 wt%, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable, and preferably 60 wt%.
In a preferred embodiment of the present invention, the nickel powder contains nickel in an amount of more than 99 wt%, such as 99.1 wt%, 99.2 wt%, 99.3 wt%, 99.4 wt%, 99.5 wt%, 99.6 wt%, 99.7 wt%, 99.8 wt%, or 99.9 wt%, but the nickel powder is not limited to the above-mentioned values, and other values not shown in the above-mentioned values are also applicable.
As a preferred embodiment of the present invention, the carbon content in the microlite toner is more than 98 wt%, such as 98.2 wt%, 98.5 wt%, 98.8 wt%, 99 wt%, 99.2 wt%, 99.5 wt%, or 99.9 wt%, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
In a preferred embodiment of the present invention, the bismuth oxide content of the bismuth oxide is greater than 99.5 wt%, such as 99.6 wt%, 99.7 wt%, 99.8 wt%, or 99.9 wt%, but not limited to the recited values, and other values not recited in the range of the recited values are also applicable.
Preferably, the silicon content of silicon calcium is 50-60 wt%, the calcium content is 28-32 wt%, and preferably the silicon content is 55 wt%.
The content of silicon may be 51 wt%, 52 wt%, 53 wt%, 54 wt%, 55 wt%, 56 wt%, 57 wt%, 58 wt%, or 59 wt%, and the content of calcium may be 28.5 wt%, 29 wt%, 29.5 wt%, 30 wt%, 30.5 wt%, 31 wt%, or 31.5 wt%, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
As a preferred embodiment of the invention, the rare earth element comprises any one or a combination of at least two of cerium, yttrium or neodymium, typical but non-limiting examples of which are: combinations of cerium and yttrium, yttrium and neodymium, neodymium and cerium, or cerium, yttrium and neodymium, and the like.
In a preferred embodiment of the present invention, the filling factor of the powder in the flux-cored wire is 48% to 50.6%, such as 48.5%, 48.6%, 48.8%, 49.0%, 49.2%, 49.5%, 49.6%, 49.7%, 49.8%, 49.9%, 50.0%, 51.1%, 51.2%, 51.3%, 51.4%, 51.5%, or 51.6%, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
Preferably, the wire diameter Φ of the flux-cored wire is 2.8 to 3.2mm, such as 2.85mm, 2.9mm, 2.95mm, 3.0mm, 3.05mm, 3.1mm, or 3.15mm, and the like, and is not limited to the recited values, and other values not recited in the range of the values are also applicable.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) the invention provides an impact-resistant and wear-resistant self-protection flux-cored wire, which has a simple formula, simplifies production procedures and saves production cost on the premise of also achieving the using effect;
(2) the invention provides an impact-resistant and wear-resistant self-protection flux-cored wire, wherein the content of non-metal mineral substances in the formula components of the flux-cored wire is not more than 5% of the total amount of the flux-cored wire at most, and compared with the similar flux-cored wire, the yield of the flux-cored wire is improved by 20%, the deposition efficiency is high, the melting bath melting speed is high, and the production efficiency is high;
(3) the invention provides an impact-resistant and wear-resistant self-protection flux-cored wire, wherein carbides of the flux-cored wire are densely distributed in a fiber shape and are vertical to the wear direction, and Cr in a metallographic structure7C3The carbide is hexagonal in the wear surface, the total volume fraction is up to more than 50%, the wear resistance is extremely high, and is 20 times of that of low-carbon steel and 8 times of that of heat-treated wear-resistant steel.
Drawings
FIG. 1 is a metallographic microstructure of a flux-cored wire provided in example 1 of the present invention after welding;
FIG. 2 is a metallographic microstructure of a flux-cored wire provided in example 2 of the present invention after welding;
fig. 3 is a metallographic microstructure diagram of a flux-cored wire provided in example 3 of the present invention after welding.
The present invention is described in further detail below. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:
example 1
The embodiment provides an impact-resistant and wear-resistant self-protection flux-cored wire, which comprises a cold-rolled low-carbon steel strip and powder, wherein the powder comprises the following components in percentage by mass of the total mass of the flux-cored wire: 37% of high-carbon ferrochrome powder, 2% of high-carbon ferromanganese powder, 5% of ferroboron powder, 0.6% of ferromolybdenum powder, 0.1% of nickel powder, 1.5% of microlite ink powder, 1% of rare earth element, 0.3% of bismuth oxide and 2% of calcium silicate powder. The packing factor is 49.5%.
Wherein, the carbon content of the high-carbon ferrochrome powder is required to be 8 percent, and the chromium content is required to be 70 percent; the high-carbon ferromanganese alloy powder requires 8% of carbon and 75% of manganese; the boron iron powder requires that the boron content is 20 percent, the molybdenum content of the ferromolybdenum powder is 60 percent, the nickel powder requires that the nickel content is 99.5 percent, the carbon content of the microlite ink powder is 99 percent, and the bismuth oxide requires that the bismuth oxide content is 99.7 percent; the silicon calcium powder requires 55% of silicon and 30% of calcium.
Welding technological parameters are as follows: the swing welding lattice jumping distance is 33mm, and the swing arc distance is 35 mm.
The current 380A, the voltage 30V and the extending length of the welding wire are 40 mm.
Average hardness value HRC61.4, metallographic microstructure shown in FIG. 1, M7C3Accounting for more than 50 percent, and the abrasion rate is 0.151g/6k revs.
Example 2
The embodiment provides an impact-resistant and wear-resistant self-protection flux-cored wire, which comprises a cold-rolled low-carbon steel strip and powder, wherein the powder comprises the following components in percentage by mass of the total mass of the flux-cored wire: 38% of high-carbon ferrochrome powder, 2% of high-carbon ferromanganese powder, 4.5% of ferroboron powder, 1.1% of ferromolybdenum powder, 0.1% of nickel powder, 1.7% of microlite ink powder and 1.2% of rare earth elements. 0.2 percent of bismuth oxide and 1.5 percent of calcium silicate powder. The packing factor is 50.3%.
Wherein, the high-carbon ferrochrome powder requires 6% of carbon and 65% of chromium; the high-carbon ferromanganese alloy powder requires 8% of carbon and 75% of manganese; 23% of boron, 60% of molybdenum, 99.5% of nickel, 99% of carbon and 99.7% of bismuth oxide; the silicon calcium powder requires 55% of silicon and 30% of calcium.
Welding technological parameters are as follows: the swing welding lattice jumping distance is 33mm, and the swing arc distance is 35 mm.
The current 380A, the voltage 30V and the extending length of the welding wire are 40 mm.
Average hardness value HRC62.2, metallographic microstructure shown in FIG. 2, M7C3Accounting for more than 50 percent, and the abrasion rate is 0.143g/6k revs.
Example 3
The embodiment provides an impact-resistant and wear-resistant self-protection flux-cored wire, which comprises a cold-rolled low-carbon steel strip and powder, wherein the powder comprises the following components in percentage by mass of the total mass of the flux-cored wire: 37.6 percent of high-carbon ferrochrome powder, 2.2 percent of high-carbon ferromanganese powder, 5.3 percent of ferroboron powder, 0.8 percent of ferromolybdenum powder, 0.1 percent of nickel powder, 1.2 percent of microlite ink powder and 1 percent of rare earth elements. 0.2 percent of bismuth oxide and 1.5 percent of calcium silicate powder. The packing factor is 49.9%.
Wherein, the carbon content of the high-carbon ferrochrome powder is required to be 8 percent, and the chromium content is required to be 70 percent; the high-carbon ferromanganese alloy powder requires 8% of carbon and 75% of manganese; the boron iron powder requires that the boron content is 20 percent, the molybdenum content of the ferromolybdenum powder is 60 percent, the nickel powder requires that the nickel content is 99.5 percent, the carbon content of the microlite ink powder is 99 percent, and the bismuth oxide requires that the bismuth oxide content is 99.7 percent; the silicon calcium powder requires 55% of silicon and 30% of calcium.
Welding technological parameters are as follows: the swing welding lattice jumping distance is 33mm, and the swing arc distance is 35 mm.
Current 360A, voltage 29V, and the extended length of the welding wire is 40 mm.
Average hardness value HRC60.2, metallographic microstructure shown in FIG. 3, M7C3Accounting for more than 50 percent, and the abrasion rate is 0.155g/6k revs.
Example 4
The embodiment provides an impact-resistant and wear-resistant self-protection flux-cored wire, which comprises a cold-rolled low-carbon steel strip and powder, wherein the powder comprises the following components in percentage by mass of the total mass of the flux-cored wire: 33.5 percent of high-carbon ferrochrome powder, 2.4 percent of high-carbon ferromanganese powder, 5.5 percent of ferroboron powder, 1.4 percent of ferromolybdenum powder, 0.3 percent of nickel powder, 1.2 percent of microlite ink powder and 1.3 percent of rare earth elements. 0.4 percent of bismuth oxide and 2 percent of calcium silicate powder. The packing factor is 48%.
Wherein, the high-carbon ferrochrome powder requires that the carbon content is 9.5 percent and the chromium content is 65 percent; the high-carbon ferromanganese alloy powder requires 6% of carbon and 70% of manganese; the boron iron powder requires 17% of boron, 55% of molybdenum, 99.5% of nickel, 98.5% of carbon, and 99.7% of bismuth oxide; the silicon calcium powder requires 50% of silicon and 32% of calcium.
Welding technological parameters are as follows: the swing welding lattice jumping distance is 33mm, and the swing arc distance is 35 mm.
Current 360A, voltage 29V, and the extended length of the welding wire is 40 mm.
Average hardness value HRC60.7, M7C3Accounting for more than 50 percent, and the abrasion rate is 0.153g/6k revs.
Example 5
The embodiment provides an impact-resistant and wear-resistant self-protection flux-cored wire, which comprises a cold-rolled low-carbon steel strip and powder, wherein the powder comprises the following components in percentage by mass of the total mass of the flux-cored wire: 37% of high-carbon ferrochrome powder, 1.9% of high-carbon ferromanganese powder, 5.5% of ferroboron powder, 1.2% of ferromolybdenum powder, 0.3% of nickel powder, 1.5% of microlite ink powder and 1.5% of rare earth elements. 0.4 percent of bismuth oxide and 2 percent of calcium silicate powder. The packing factor is 51.3%.
Wherein, the high-carbon ferrochrome powder requires 15% of carbon and 65% of chromium; the high-carbon ferromanganese alloy powder requires that the carbon content is 9.2 percent and the manganese content is 76 percent; the boron iron powder requires 17% of boron, 65% of molybdenum, 99.5% of nickel, 99.5% of carbon, and 99.8% of bismuth oxide; the silicon calcium powder requires that the silicon content is 60 percent and the calcium content is 28 percent.
Welding technological parameters are as follows: the swing welding lattice jumping distance is 33mm, and the swing arc distance is 35 mm.
The current 380A, the voltage 29V and the extending length of the welding wire are 40 mm.
Average hardness value HRC62.1, M7C3Accounting for more than 50 percent, and the abrasion rate is 0.147g/6k revs.
Comparative example 1
The comparative example was carried out under the same conditions as in example 1 except that the rare earth element was replaced with the equal-mass high-carbon ferrochrome powder.
Average hardness value HRC60.2, M7C3The content is more than 50 percent, the hardness and the total amount of carbide are still reasonable, but the hardness distribution is not uniform, the deviation is large, and the carbide is in an aggregated state. The abrasion rate was 0.188g/6k revs.
Comparative example 2
The comparative example was carried out under the same conditions as in example 1 except that ferroboron powder was replaced with equal-quality high-carbon ferrochrome powder.
The average hardness value HRC56.2 and the abrasion rate is 0.227g/6k revs.
Comparative example 3
This comparative example was conducted under the same conditions as in example 1 except that the microlite toner was replaced with a high-carbon ferrochrome powder of equal quality.
The average hardness value HRC52.2 and the abrasion rate is 0.301g/6k revs.
Comparative example 4
The comparative example was carried out under the same conditions as in example 1 except that calcium-silicon powder was replaced with equal-quality high-carbon ferrochrome powder.
The spattering and the smoke dust are obviously larger in the welding process, the surface is rough after welding, and the interior is slightly filled with slag.
The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (15)
1. The self-protection flux-cored wire with impact resistance and abrasion resistance is characterized by comprising a cold-rolled low-carbon steel strip and powder, wherein the powder comprises the following components in percentage by mass of the total mass of the flux-cored wire: 30-38% of high-carbon ferrochrome powder, 1.7-2.5% of high-carbon ferromanganese powder, 4.5-5.5% of ferroboron powder, 0.5-1.5% of ferromolybdenum powder, 0-0.5% of nickel powder, 1-2% of microlite ink powder, 0.5-1.5% of rare earth elements, 0.2-0.5% of bismuth oxide and 1-2% of calcium silicate powder, wherein the sum of the components is the percentage of the powder in the total mass of the flux-cored wire;
the content of manganese in the high-carbon ferromanganese alloy powder is 70-80 wt%;
the silicon content in the calcium silicate powder is 50-60 wt%;
the filling coefficient of the traditional Chinese medicine powder in the flux-cored wire is 48-54%;
the wire diameter phi of the flux-cored wire is 2.8-3.2 mm.
2. The flux-cored wire of claim 1, wherein the high-carbon ferrochrome powder contains 6 to 10 wt% of carbon and 65 to 75 wt% of chromium.
3. The flux-cored welding wire of claim 2, wherein the carbon content of the high-carbon ferrochrome powder is 8 wt%, and the chromium content is 70 wt%.
4. The flux-cored wire of claim 1, wherein the carbon content of the high-carbon ferromanganese alloy powder is 6-10 wt%.
5. The flux-cored welding wire of claim 4, wherein the high-carbon ferromanganese alloy powder comprises 8 wt% carbon and 75 wt% manganese.
6. The flux-cored wire of claim 1, wherein the boron iron powder comprises 15-25 wt% of boron.
7. The flux-cored welding wire of claim 6, wherein the ferroboron powder comprises 20 wt% boron.
8. The flux-cored wire of claim 1, wherein the content of molybdenum in the moly iron powder is 55-65 wt%.
9. The flux-cored welding wire of claim 8, wherein the ferromolybdenum wire has a molybdenum content of 60 wt%.
10. The flux-cored wire of claim 1, wherein the nickel powder comprises nickel in an amount greater than 99 wt%.
11. The flux-cored welding wire of claim 1, wherein the content of carbon in the microcrystalline graphite powder is greater than 98 wt%.
12. The flux-cored wire of claim 1, wherein the bismuth oxide comprises greater than 99.5 wt% bismuth oxide.
13. The flux-cored wire of claim 1, wherein the calcium content in the calcium silicate powder is 28-32 wt%.
14. The flux-cored wire of claim 1, wherein the silicon calcium powder has a silicon content of 55 wt%.
15. The flux cored welding wire of claim 1, wherein the rare earth element comprises any one of cerium, yttrium, or neodymium, or a combination of at least two thereof.
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| CN202010484816.1A CN111618474B (en) | 2020-06-01 | 2020-06-01 | Impact-resistant and wear-resistant self-protection flux-cored wire |
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| CN111618474B true CN111618474B (en) | 2021-11-23 |
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| CN115647646A (en) * | 2022-10-25 | 2023-01-31 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire for mixed gas shielded welding and use method thereof |
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