CN111331277A - J507 welding rod and preparation method thereof - Google Patents
J507 welding rod and preparation method thereof Download PDFInfo
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- CN111331277A CN111331277A CN201911117026.3A CN201911117026A CN111331277A CN 111331277 A CN111331277 A CN 111331277A CN 201911117026 A CN201911117026 A CN 201911117026A CN 111331277 A CN111331277 A CN 111331277A
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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
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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
- B23K35/40—Making wire or rods for soldering or welding
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- Nonmetallic Welding Materials (AREA)
Abstract
The invention aims to solve the problems of J507 welding rod welding flux in the prior art, provides a J507 welding rod and a preparation method thereof, and belongs to the technical field of welding materials. The welding rod of the invention consists of a welding rod coating and a welding core; the welding rod coating comprises the following components in percentage by mass: 40-45% of marble, 20-25% of fluorite, 2-5% of ferromanganese, 14-25% of vanadium titano-magnetite tailings, 1-3% of soda ash, 5-8% of quartz and 2-5% of low-concentration ferrosilicon; and then additionally adding a binder into the electrode coating, wherein the mass percent of the electrode coating to the binder is 92-95%: 8 to 5 percent. The welding rod has excellent performance, and the tailings of the vanadium titano-magnetite are utilized, so that the raw material source is wide, and the effects of reducing cost and protecting environment are achieved.
Description
Technical Field
The invention belongs to the technical field of welding materials, and particularly relates to a J507 welding rod and a preparation method thereof.
Background
J507 is a low hydrogen sodium type welding rod, which is an alkaline welding rod, can weld typical steels such as Q235, Q245R, Q345R and the like in structural steels, and has a tensile strength which is much higher than that of a common welding rod, so that a steel structure with larger stress or dynamic load is generally welded, but the weld joint formed after the J507 is welded is not attractive.
The coating of the electrode is an important factor in determining the quality of the weld. The welding rod coating generally contains arc stabilizer, slag former, gas former, deoxidant, alloying agent, slag diluent, binder, plastic binder, etc. Patent CN 106736002A discloses a J507 welding rod and a preparation method thereof, the main components are marble, fluorite, titanium dioxide, low-carbon manganese iron powder, quartz powder, ferrotitanium powder, sodium carbonate and the like, TiO is used in the patent2Anatase titanium dioxide with the content of more than or equal to 91.0wt percent and sodium carbonate. The titanium dioxide and the sodium carbonate can form sodium metatitanate in the welding process, and the sodium metatitanate can reduce the arc voltage, stabilize the arc and reduce the splashing, so that the welding electrode has excellent service performance and fine and dense welding lines. However, in order to ensure the purity of the sodium metatitanate generated during welding, the titanium dioxide adopted in the welding flux is required to be of the welding electrode grade, so that the cost is high; and in the welding process, carbon dioxide gas generated by the reaction of titanium dioxide and sodium carbonate is not easy to be completely discharged, so that the content of titanium dioxide in the welding seam is unstable, and the quality of the welding seam is influenced.
Disclosure of Invention
The invention aims to solve the problems of J507 welding rod welding materials in the prior art and provides a J507 welding rod and a preparation method thereof. The formula of the welding rod provided by the invention has the advantages that the raw material source is wide, and the prepared J507 welding rod has excellent performance.
The technical purpose of the invention is realized by the following technical scheme:
one of the technical schemes of the invention is that the J507 structural steel welding rod consists of a welding rod coating and a welding core;
the welding rod coating comprises the following components in percentage by mass: 41-45% of marble, 20-25% of fluorite, 2-5% of ferromanganese, 24-31% of vanadium titano-magnetite tailings, 2-6% of low-concentration ferrosilicon and 100% of total content; and then additionally adding a binder into the electrode coating, wherein the mass percent of the electrode coating to the binder is 92-95%: 8 to 5 percent.
In the welding rod, the adhesive is potassium-sodium water glass.
In the welding rod, the chemical composition of the vanadium titano-magnetite tailings is as follows: sodium metatitanate (Na)2TiO3) 70-75% of TFe grade, 7-9% of SiO27.5 to 10% of S, 0.15 to 0.20% of CaO, 0.0 to 2.1% of MgO, and Al2O31.0 to 1.2 percent of P, less than 0.010 percent of MnO and other impurities.
In the welding rod, the sodium metatitanate is in a whisker structure, the diameter of the whisker is 70-100 nm, and the length-diameter ratio is 30-10.
In the welding rod, the content of fluorite with CaF2 is more than or equal to 96%, ferromanganese is medium-carbon ferromanganese, the purity of soda is more than or equal to 95%, the purity of quartz is more than or equal to 99%, and the content of low-concentration ferrosilicon is FeSi75Al0.5.
In the welding rod, the average grain diameter of marble, fluorite, ferromanganese, soda ash and low-concentration ferrosilicon is 80-300 meshes;
in the welding rod, the welding core is H08A steel.
The second technical scheme of the invention is that the preparation method of the J507 structural steel electrode comprises the following steps:
1) the components of the welding rod coating are uniformly mixed according to the mass ratio.
2) Weighing the adhesive in proportion, and mixing the adhesive with the coating powder to form dough;
3) adding welding core H08A steel and the mixed welding rod coating into a welding rod extruder, carrying out extrusion forming, naturally airing the formed welding rod for 18-24 hours, and then drying at 130-150 ℃ and 330-350 ℃ for 1-2 hours respectively.
Compared with the prior art, the invention has the advantages that:
1. the coating of the welding rod uses the tailings of the vanadium titano-magnetite as a slagging agent, can reduce the melting temperature, improve the fluidity of molten slag, promote the aggregation of the reduction products of weld metal, and react with CaF at high temperature2Acting to form TiF4It has hydrogen pore resisting effect. Less splashing, easy arc striking, simple slag removal, excellent slag, beautiful welding seam and no air hole in the welding process. The flaw detection result of the weld metal is grade I, no defects are generated in the weld, and the national standard and the production requirement are met.
2. The electrode coating of the invention utilizes the tailings after the iron is separated from the mineral, the tailings contain sodium metatitanate whiskers, and the electrode prepared by the vanadium titano-magnetite tailings has good performance because the atomic structure arrangement is highly ordered when the whiskers are crystallized and the valence bond strength between the atoms of the material is high. And the crystal whisker improves the fluidity of the slag, can reduce the inclusions of weld metal, and avoids the defects of indentation (pocking mark) and the like on the surface of the weld.
3. Vanadium-titanium magnetite is a composite ore containing multiple metal elements, and is symbiotic magnetite mainly containing iron, vanadium and titanium, and a large amount of tailings are produced after separation, and are mainly stored in a tailing pond at present. This not only results in a large waste of potential resources, but also has a certain harm to the environment. The electrode coating of the invention utilizes the modified tailings, and reduces the production cost of the electrode.
Detailed Description
The technological parameters of the welding experiment of the welding rod prepared in the following embodiment are as follows: welding current 160A and interlayer temperature 160 ℃.
The method for carrying out weld joint flaw detection on weld joint metal after welding (flaw detection standard: GB 11345-2012) comprises the following steps: the specific parameters of the flaw detection experiment are as follows: focal length: 600mm, tube voltage: 170kv, tube current: 5mA, test materials: a3, transillumination thickness: 20mm, film brand: II, developing conditions: 20 ℃, 5min, film blackness: 2.5, fixing conditions: 20 ℃, 10min, quality index: 10.
the standard adopted by the Charpy impact test for detecting weld metal after welding of the welding rod is as follows: GB/T229-: GB/T13239-.
In the following examples, the vanadium titano-magnetite tailings contained 70% sodium metatitanate whisker, 17% TFe whisker and SiO27.5% of CaO, 1.1% of Al2O31.2 percent of S, 0.20 percent of S and 3 percent of other impurities. The diameter of the whisker is 70 to100nm, and the length-diameter ratio of the nano-particles is 30-10.
The fluorite purity is more than or equal to 96 percent of CaF2, the ferromanganese is medium-carbon ferromanganese, the soda ash purity is more than or equal to 95 percent, the quartz purity is more than or equal to 99 percent of silicon oxide, the low-concentration ferrosilicon is FeSi75Al0.5, and the ferromanganese is FeMn82C1.5.
Example 1
1) Firstly, weighing various powders according to the mass ratio of the components, wherein the welding rod coating powder comprises the following components: 420g of marble, 250g of fluorite, 20g of ferromanganese, 250g of vanadium titano-magnetite tailings and 60g of low-degree ferrosilicon; and mixing the powder in a powder mixer for 1 hour to be uniformly mixed, wherein the particle size of the powder after grinding is 80-300 meshes.
2) 87g of potassium-sodium water glass as a binding agent is additionally added into the coating of the welding rod, and the coating of the welding rod and the binding agent account for 92 percent by mass: 8 percent; after mixing, a dough-like shape is formed.
3) H08A steel core wire with the diameter of 4.0mm and the mixed coating are added into a welding rod extruder for extrusion forming. The formed welding rod is naturally aired for 1 day and then is respectively dried for 2 hours at 150 ℃ and 350 ℃.
The results of the charpy impact test of the weld metal were: the absorption work at-30 ℃ was 165J.
The results of the tensile test of the weld metal were: the yield strength is 480MPa, the tensile strength is 558MPa, and the elongation is 28.0%.
And the flaw detection result of the weld metal is I grade. The welding rod has less splashing in the welding process, easy re-striking, simple slag removal, excellent slag, beautiful formed welding line and no air hole.
Example 2
1) Firstly, weighing various powders according to the mass ratio of the components, wherein the welding rod coating powder comprises the following components: 420g of marble, 210g of fluorite, 25g of ferromanganese, 305g of vanadium titano-magnetite tailings and 40g of low-grade ferrosilicon; mixing the powder in a powder mixer for 1 hour to be uniformly mixed, wherein the particle size of the powder after grinding is 80-300 meshes;
2) and adding 53g of potassium-sodium silicate as a binder into the electrode coating, wherein the mass percent of the electrode coating to the binder is 95%: 5 percent; after mixing, forming dough;
3) H08A steel core wire with the diameter of 4.0mm and the mixed coating are added into a welding rod extruder for extrusion forming. The formed welding rod is naturally aired for 18 hours, and then is dried for 1.5 hours at 130 ℃ and 330 ℃.
The results of the charpy impact test of the weld metal were: the absorption work at-30 ℃ was 182J.
The results of the tensile test of the weld metal were: the yield strength was 498MPa, the tensile strength was 570MPa, and the elongation was 26.0%.
And the flaw detection result of the weld metal is I grade. The welding rod has less splashing in the welding process, easy re-striking, simple slag removal, excellent slag, beautiful formed welding line and no air hole.
Example 3
1) Firstly, weighing various powders according to the mass ratio of the components, wherein the welding rod coating powder comprises the following components: 450g of marble, 200g of fluorite, 50g of ferromanganese, 250g of vanadium titano-magnetite tailings and 50g of low-degree ferrosilicon; mixing the powder in a powder mixer for 1 hour to be uniformly mixed, wherein the particle size of the powder after grinding is 80-300 meshes;
2) and then 20g of potassium-sodium water glass as a binding agent is additionally added into the coating of the welding rod, wherein the mass percentage of the coating of the welding rod to the binding agent is 98%: 2 percent; after mixing, forming dough;
3) H08A steel core wire with the diameter of 4.0mm and the mixed coating are added into a welding rod extruder for extrusion forming. The formed welding rod is naturally aired for 20 hours, and then is dried for 1 hour at the temperature of 140 ℃ and 340 ℃.
The results of the charpy impact test of the weld metal were: the absorption work at-30 ℃ was 135J.
The results of the tensile test of the weld metal were: the yield strength is 405MPa, the tensile strength is 496MPa, and the elongation is 22.0%.
And the flaw detection result of the weld metal is I grade. The welding rod has less splashing in the welding process, easy re-striking, simple slag removal, excellent slag, beautiful formed welding line and no air hole.
Claims (8)
1. A J507 welding rod is characterized by consisting of a welding rod coating and a welding core; the welding rod coating comprises the following components in percentage by mass: 40-45% of marble, 20-25% of fluorite, 2-5% of ferromanganese, 14-25% of vanadium titano-magnetite tailings, 1-3% of soda ash, 5-8% of quartz and 2-5% of low-concentration ferrosilicon; and then additionally adding a binder into the electrode coating, wherein the mass percent of the electrode coating to the binder is 92-95%: 8 to 5 percent.
2. The J507 electrode of claim 1, wherein the binder is potassium sodium water glass.
3. The J507 welding electrode as claimed in claim 1, wherein the chemical composition of the vanadium titano-magnetite tailings is: 70-75% of sodium metatitanate whisker, 7-9% of TFe grade and SiO27.5 to 10% of S, 0.15 to 0.20% of CaO, 0.0 to 2.1% of MgO, and Al2O31.0 to 1.2 percent of P, less than 0.010 percent of MnO and other impurities.
4. The J507 welding electrode according to claim 2, wherein the sodium metatitanate whisker has a diameter of 70 to 100nm and an aspect ratio of 30 to 100.
5. The J507 electrode of claim 1, wherein the fluorite purity is: CaF2The content of the sodium aluminate is more than or equal to 96 percent, the ferromanganese is medium carbon ferromanganese, the purity of the sodium carbonate is more than or equal to 95 percent, and the purity of the quartz is as follows: the content of silicon oxide is more than or equal to 99 percent, and the low-concentration ferrosilicon is FeSi75Al0.5.
6. The J507 electrode of claim 1, wherein the marble, fluorite, ferromanganese, soda ash, quartz and low-grade silicon iron have an average particle size of 80 to 300 mesh.
7. The J507 electrode of claim 1 wherein the core wire is H08A steel.
8. The method for preparing the J507 structural steel electrode as recited in any one of claims 1 to 7, characterized by the steps of:
1) uniformly mixing all components of the welding rod coating according to the mass ratio;
2) weighing the adhesive in proportion, and mixing the adhesive with the coating powder to form dough;
3) and adding the welding core and the mixed welding rod coating into a welding rod extruder, carrying out extrusion forming, naturally airing the formed welding rod for 18-24 hours, and then respectively drying at 130-150 ℃ and 330-350 ℃ for 1-2 hours.
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| CN106736002A (en) * | 2016-12-06 | 2017-05-31 | 攀枝花学院 | A kind of J507 welding rods and preparation method thereof |
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2019
- 2019-11-15 CN CN201911117026.3A patent/CN111331277B/en active Active
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| US20120160363A1 (en) * | 2010-12-28 | 2012-06-28 | Exxonmobil Research And Engineering Company | High manganese containing steels for oil, gas and petrochemical applications |
| US20150336219A1 (en) * | 2011-01-13 | 2015-11-26 | Siemens Energy, Inc. | Composite materials and methods for laser manufacturing and repair of metals |
| CN103128463A (en) * | 2013-03-14 | 2013-06-05 | 西南石油大学 | Abrasion-resistant and corrosion-resistant iron-based amorphous surfacing welding electrode and manufacturing method thereof |
| CN105522255A (en) * | 2016-02-29 | 2016-04-27 | 潍坊学院 | Method for preparing abrasion-resisting overlaying welding layer through manual arc overlaying welding |
| CN106736002A (en) * | 2016-12-06 | 2017-05-31 | 攀枝花学院 | A kind of J507 welding rods and preparation method thereof |
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