CN112975196B - Flux-cored wire for efficient welding hot forging die surfacing transition layer - Google Patents
Flux-cored wire for efficient welding hot forging die surfacing transition layer Download PDFInfo
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- CN112975196B CN112975196B CN202110205234.XA CN202110205234A CN112975196B CN 112975196 B CN112975196 B CN 112975196B CN 202110205234 A CN202110205234 A CN 202110205234A CN 112975196 B CN112975196 B CN 112975196B
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- flux
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- powder
- hot forging
- forging die
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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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—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
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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 flux-cored wire for a surfacing transition layer of an efficient welding hot forging die, which comprises a sheath and a flux core, wherein the sheath is made of a cold-rolled low-carbon steel strip, and the flux core comprises fluoride, carbonate, oxide, metal and alloy powder; wherein, the metal and alloy powder comprises chromium carbide, ferromanganese, ferrosilicon, ferromolybdenum, ferrovanadium, chromium powder, nickel powder, tungsten powder and iron powder. The flux-cored wire is mainly suitable for repair welding of a transition layer of a 5CrNiMo and 5CrMnMo hot forging die, a surfacing layer is stable in high-temperature hardness and excellent in crack resistance, the hardness of the surfacing layer is HRC 42-48, the service cycle of the die is prolonged, the production quantity of forgings is increased, and the production cost of the forgings is reduced.
Description
Technical Field
The invention relates to a welding material, in particular to a flux-cored wire for a surfacing transition layer of an efficient welding hot forging die.
Background
The hot forging forming process is an advanced processing method with high production efficiency, good workpiece quality and raw material saving. The hot forging die is widely applied to various industrial departments of machinery, locomotives, automobiles, tractors, aviation, light industry, petrochemical industry and power, and the demand of the hot forging die in industrial production is large. Because the working condition of the hot forging die is severe and the service life is short, the early failure conditions such as cracking, abrasion, collapse, cold and hot fatigue and the like often occur. Therefore, the surfacing repair is carried out on the hot forging die, the service life of the hot forging die is prolonged, and the method has great economic significance.
The diameter of the conventional gas shielded flux-cored wire is generally 1.2 mm-1.6 mm, and the requirement of the welding efficiency of a large-scale hot die cannot be met; a conventional large-diameter welding wire (more than 2.4 mm) needs a submerged-arc welding process, and the submerged-arc welding process cannot meet the welding requirements of a complex cavity structure. Therefore, in order to meet the requirements of surfacing welding, welding and repairing of large hot forging dies, a welding wire which can meet the requirements of welding efficiency of the large dies and the welding requirements of the large dies on complicated shapes needs to be developed.
Disclosure of Invention
In view of the above, the invention aims to provide an argon-rich shielded flux-cored wire for a surfacing transition layer of a high-efficiency welding hot forging die, which has Rockwell hardness of HRC 42-48 and a diameter of 2.4mm, and can meet the requirements of welding efficiency of large dies and complicated shapes of large dies, and simultaneously, through reasonable combination of slag systems and alloy systems, the metal welding layer of the surfacing die reaches the required hardness, and the repaired hot forging die has excellent crack resistance in use.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a flux-cored wire for a surfacing transition layer of an efficient welding hot forging die comprises a sheath and a flux core, wherein the sheath is made of a cold-rolled low-carbon steel strip, and the flux core comprises fluoride, carbonate, oxide, metal and alloy powder; wherein the metal and alloy powder comprises chromium carbide, ferromanganese, ferrosilicon, ferromolybdenum, ferrovanadium, chromium powder, nickel powder, tungsten powder and iron powder; the flux core comprises 5-10% of fluoride, 1-5% of carbonate, 1-5% of oxide, 5-10% of chromium carbide, 5-10% of ferromanganese, 1-5% of ferrosilicon, 3-8% of ferromolybdenum, 1-5% of ferrovanadium, 3-8% of nickel powder, 1-5% of chromium powder, 5-10% of tungsten powder and the balance of iron powder.
Further, the width/thickness of the steel strip is 40 to 55.
Further, the flux core accounts for 25-35% of the welding wire by weight.
Further, the fluoride comprises sodium fluoride, sodium fluoroaluminate and rare earth fluoride, wherein the ratio of the sum of the sodium fluoride and the sodium fluoroaluminate in parts by weight to the rare earth fluoride in parts by weight is 5-8:1.
Further, the carbonates include calcium carbonate, magnesium carbonate, and barium carbonate; wherein the ratio of the weight portion of the calcium carbonate to the sum of the weight portions of the magnesium carbonate and the barium carbonate is 1-2:1.
Further, the oxides include titanium dioxide, silicon dioxide, and potassium oxide; wherein the ratio of the sum of the weight parts of the titanium dioxide and the silicon dioxide to the weight parts of the potassium oxide is 3-6:1.
Further, the flux-cored wire for the surfacing transition layer of the efficient welding hot forging die has the requirements on the content proportion of the surfacing metal alloy, namely Cr: ni =1.5 to 2.0:1.
further, the diameter of the welding wire is 2.4mm.
Further, the welding wire adopts 80% Ar and 20% CO 2 The argon-rich gas is used as a shielding gas for welding.
The invention also provides application of the flux-cored wire for the surfacing transition layer of the efficient welding hot forging die in repairing and remanufacturing of the hot forging die.
The argon-rich gas shielded surfacing flux-cored wire is mainly suitable for repair welding of a transition layer of a 5CrNiMo and 5CrMnMo hot forging die, and the surfacing layer has stable high-temperature hardness and excellent crack resistance.
The welding wire deposited metal component detection shows that the welding wire deposited metal component detection comprises, by weight, 0.20% of carbon, 1.60% of manganese, 0.50% of silicon, 3.0% of chromium, 1.0% of molybdenum, 1.5% of nickel, 1.5% of tungsten, 0.5% of vanadium and the balance of iron. The overlaying five-layer hardness HRC is 42-48.
Compared with the prior art, the flux-cored wire for the surfacing transition layer of the efficient welding hot forging die has the following advantages:
(1) The invention develops a 2.4mm high-efficiency welding gas-shielded flux-cored wire, and develops a surfacing repair flux-cored wire with stable high-temperature hardness and excellent crack resistance according to the welding requirements of different positions of a hot-forging die.
(2) The flux-cored wire for the surfacing transition layer of the efficient welding hot forging die is a novel flux-cored wire alkaline slag system type, and the flux-cored wire alkaline slag system mainly comprises fluoride, carbonate and oxide. Wherein the proportion of the fluoride is sodium fluoride + sodium fluoroaluminate: the proportion combination of rare earth fluoride = 5-8:1 ensures that the welding process performance is more excellent when large-specification high-efficiency welding is carried out, reduces welding spatter and improves deposition efficiency.
(3) The invention develops a novel alloy system, which is an alloy system mainly comprising chromium, nickel, molybdenum and tungsten, wherein the weight ratio of Cr: ni =1.5 to 2.0:1, the surfacing repair transition layer has stable high-temperature hardness and excellent crack resistance, the hardness HRC of the surfacing layer is 42-48, the service cycle of a die is prolonged, the production quantity of forgings is increased, and the production cost of the forgings is reduced.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The present invention will be described in detail with reference to examples.
Example 1
A flux-cored welding wire for a surfacing transition layer of a high-efficiency welding hot forging die comprises a sheath and a flux core, wherein the sheath is a cold-rolled low-carbon steel strip, the width of the steel strip is 16mm, and the thickness of the steel strip is 0.3mm; the medicine core comprises fluoride, carbonate, oxide, metal and alloy powder. Argon-rich (80% Ar +20% C) with 2.4mm major diameter 2 ) The production process of the protective flux-cored wire is high in welding efficiency.
Specifically, the formula of the flux core of the welding wire comprises 60 parts of sodium fluoride, 20 parts of sodium fluoroaluminate, 10 parts of rare earth fluoride, 10 parts of calcium carbonate, 5 parts of magnesium carbonate, 5 parts of barium carbonate, 20 parts of titanium dioxide, 10 parts of silicon dioxide, 10 parts of potassium oxide, 60 parts of chromium carbide, 60 parts of ferromanganese, 30 parts of ferrosilicon, 40 parts of ferromolybdenum, 30 parts of ferrovanadium, 40 parts of chromium powder, 50 parts of nickel powder, 70 parts of tungsten powder and 500 parts of iron powder.
The flux core accounts for 34% of the total weight of the welding wire.
Table 1 example 1 wire build-up metal composition, hardness
Example 2
A flux-cored wire for a surfacing transition layer of an efficient welding hot forging die comprises a sheath and a flux core, wherein the sheath is a cold-rolled low-carbon steel strip, the width of the steel strip is 16.5mm, and the thickness of the steel strip is 0.35mm. The flux core comprises fluoride, carbonate, oxide, metal and alloy powder. Argon-enriched (80% Ar +20% CO) with 2.4mm major diameter 2 ) The production process of the protective flux-cored wire is high in welding efficiency.
Specifically, the formula of the flux core of the welding wire comprises 50 parts of sodium fluoride, 30 parts of sodium fluoroaluminate, 12 parts of rare earth fluoride, 20 parts of calcium carbonate, 5 parts of magnesium carbonate, 10 parts of barium carbonate, 15 parts of titanium dioxide, 12 parts of silicon dioxide, 8 parts of potassium oxide, 80 parts of chromium carbide, 70 parts of ferromanganese, 20 parts of ferrosilicon, 60 parts of ferromolybdenum, 50 parts of ferrovanadium, 30 parts of chromium powder, 60 parts of nickel powder, 80 parts of tungsten powder and 400 parts of iron powder.
The flux core accounts for 30% of the total weight of the welding wire.
Table 2 example 2 wire build-up metal composition, hardness
Example 3
A flux-cored wire for a surfacing transition layer of an efficient welding hot forging die comprises a sheath and a flux core, wherein the sheath is a cold-rolled low-carbon steel strip, the width of the steel strip is 16.5mm, and the thickness of the steel strip is 0.40mm. The flux core comprises fluoride, carbonate, oxide, metal and alloy powder. Argon-enriched (80% Ar +20% CO) with 2.4mm major diameter 2 ) The production process of the flux-cored wire is high in welding efficiency.
Specifically, the formula of the flux core of the welding wire comprises 40 parts of sodium fluoride, 40 parts of sodium fluoroaluminate, 15 parts of rare earth fluoride, 20 parts of calcium carbonate, 10 parts of magnesium carbonate, 5 parts of barium carbonate, 10 parts of titanium dioxide, 15 parts of silicon dioxide, 5 parts of potassium oxide, 90 parts of chromium carbide, 90 parts of ferromanganese, 40 parts of ferrosilicon, 70 parts of ferromolybdenum, 40 parts of ferrovanadium, 20 parts of chromium powder, 70 parts of nickel powder, 90 parts of tungsten powder and 350 parts of iron powder.
The flux core accounts for 26% of the total weight of the welding wire.
Table 3 example 3 wire build-up weld metal composition, hardness
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. The utility model provides a high-efficient welding hot forging mould build-up welding flux-cored wire for transition layer which characterized in that: the steel plate comprises a sheath and a flux core, wherein the sheath is made of cold-rolled low-carbon steel strips, and the flux core comprises fluoride, carbonate, oxide, metal and alloy powder; wherein the metal and alloy powder comprises chromium carbide, ferromanganese, ferrosilicon, ferromolybdenum, ferrovanadium, chromium powder, nickel powder, tungsten powder and iron powder; the flux core comprises 5-10% of fluoride, 1-5% of carbonate, 1-5% of oxide, 5-10% of chromium carbide, 5-10% of ferromanganese, 1-5% of ferrosilicon, 3-8% of ferromolybdenum, 1-5% of ferrovanadium, 3-8% of nickel powder, 1-5% of chromium powder, 5-10% of tungsten powder and the balance of iron powder by weight percentage;
the fluoride comprises sodium fluoride, sodium fluoroaluminate and rare earth fluoride, wherein the ratio of the sum of the sodium fluoride and the sodium fluoroaluminate to the rare earth fluoride is 5-8:1;
the carbonate comprises calcium carbonate, magnesium carbonate and barium carbonate; wherein the ratio of the weight parts of the calcium carbonate to the sum of the weight parts of the magnesium carbonate and the barium carbonate is 1-2:1;
the oxides include titanium dioxide, silicon dioxide and potassium oxide; wherein the ratio of the sum of the weight parts of titanium dioxide and silicon dioxide to the weight parts of potassium oxide is 3-6:1;
the proportion of the content of the surfacing metal alloy is required, and Cr: ni =1.5 to 2.0:1.
2. the flux-cored wire for the surfacing transition layer of the efficient welding hot forging die according to claim 1, which is characterized in that: the width/thickness of the steel strip is 40-55.
3. The flux-cored welding wire for the efficient welding hot forging die surfacing transition layer according to claim 1, which is characterized in that: the flux core accounts for 25-35% of the welding wire by weight.
4. The flux-cored welding wire for the efficient welding hot forging die surfacing transition layer according to claim 1, which is characterized in that: the diameter of the welding wire is 2.4mm.
5. The flux-cored welding wire for the efficient welding hot forging die surfacing transition layer according to claim 1, which is characterized in that: the welding wire adopts 80% Ar and 20% CO 2 The argon-rich gas is used as a shielding gas for welding.
6. The application of the flux-cored wire for overlaying a transition layer of the high-efficiency welding hot forging die as claimed in any one of claims 1 to 5 in repair and remanufacture of the hot forging die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110205234.XA CN112975196B (en) | 2021-02-24 | 2021-02-24 | Flux-cored wire for efficient welding hot forging die surfacing transition layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110205234.XA CN112975196B (en) | 2021-02-24 | 2021-02-24 | Flux-cored wire for efficient welding hot forging die surfacing transition layer |
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| CN112975196A CN112975196A (en) | 2021-06-18 |
| CN112975196B true CN112975196B (en) | 2023-02-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113245748B (en) * | 2021-07-05 | 2021-09-21 | 四川西冶新材料股份有限公司 | 14Cr1MoR matched high-toughness welding electrode for hydrogen-contacting steel |
| CN115415698B (en) * | 2022-06-02 | 2023-10-20 | 湖北三环智能科技有限公司 | Flux-cored wire manufactured through repair and remanufacturing of hot forging die and performance real-time regulation and control method |
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2021
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| GB1366688A (en) * | 1970-08-12 | 1974-09-11 | Nippon Steel Corp | Submerged arc welding methods |
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