CN114905187B - Low-hydrogen type welding rod applicable to austenitic light steel and preparation method - Google Patents
Low-hydrogen type welding rod applicable to austenitic light steel and preparation method Download PDFInfo
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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
- B23K35/3026—Mn as the principal constituent
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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
- B23K35/3033—Ni as the principal constituent
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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
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
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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
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
- B23K35/325—Ti as the principal constituent
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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
- B23K35/3601—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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- 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
- B23K35/3602—Carbonates, basic oxides or hydroxides
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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
- B23K35/3601—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
- B23K35/3607—Silica or silicates
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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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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a low-hydrogen type welding rod applicable to austenitic light steel and a preparation method thereof, belonging to the field of special alloy welding materials. The welding rod of the invention can effectively weld high-strength light steel with high manganese and high carbon, is particularly used for important construction occasions of high-strength austenitic light steel with 450MPa level, can obtain a welding joint and a welding seam with the strength and the toughness matched with that of the body steel, and meets the high-quality requirement of construction of key projects.
Description
Technical Field
The invention belongs to the field of special alloy welding materials, and relates to a low-hydrogen type welding rod applicable to special high-strength austenitic light steel in a marine environment and a preparation method thereof.
Background
With the continuous development of social economy, a series of problems such as overhigh energy consumption, non-standard environmental emission and the like become more serious. The solution is to use clean energy to replace the existing fuel power, and reduce the weight of the transportation equipment to reduce the burden and consumption to limit the pollution index. Therefore, the innovative method for reducing weight and enhancing strength of traffic carrying equipment is always an important research idea for energy conservation and environmental protection in the field. The Fe-Mn-Al-C alloy steel can promote multiple high-performance indexes such as light weight, high strength, increased ductility and toughness and the like by adding a light weight element Al (generally more than 5%) to reduce the mass density of the material and simultaneously adding a proper amount of austenite stabilizing elements such as Mn, C and the like. The invention idea of the light steel is widely applied to the prior art. In addition, welding is the main connection method in engineering construction of such light steel as carrying equipment, and arc welding by a welding rod is a common welding method. However, in the prior art, hydrogen type welding rods which are suitable for high-strength austenite lightweight steel and have excellent performance are rare.
Compared with the existing patent documents, the Chinese invention patent CN201910008172.6 discloses a low-hydrogen type welding rod for ultralow-temperature high manganese steel manual arc welding, which is a document close to the technical field of the invention. The raw material components of the material comprise the following components in parts by weight: 0.30 to 0.75 percent of C, 20 to 26 percent of Mn, 3.0 to 5.5 percent of Cr, 6.5 to 8.5 percent of Ni, less than or equal to 0.001 percent of P, less than or equal to 0.002 percent of S, and the balance of Fe and inevitable impurities. The weld joint is well formed, but when the high-strength welding austenitic light steel of 450MPa is used as a construction workpiece, the weld joint strength is obviously lower than the construction quality requirement, and the welding connection quality requirement of the high-strength welding austenitic light steel material cannot be realized.
The Chinese invention patent CN202010456712.X discloses an arc welding electrode of ultralow temperature high manganese steel and a preparation method thereof, which is another document close to the technical field of the invention. The welding core comprises the following raw materials in parts by weight: 0.30 to 0.75 percent of C, 19 to 25 percent of Mn, 3.0 to 5.5 percent of Cr, 3.5 to 5.5 percent of Ni, 3.5 to 5.5 percent of Mo, 2.5 to 4.0 percent of W, less than or equal to 0.010 percent of P, less than or equal to 0.006 percent of S, and the balance of Fe and inevitable impurities. The formed weld metal has the characteristics of ultralow temperature and high toughness, and the strength can be matched with high-strength austenite light steel. However, the following problems cannot be solved: when the Al content in the high-strength light steel is high, al in the welded base material can diffuse into a welding seam through short-time high-temperature formation to form excessive Al 2 O 3 Inclusion, if other effective measures are not adopted, the mechanical property index of the welding line is possibly reduced and exceeds the standard, and even great hidden danger of engineering construction can be caused.
In summary, the technical indicators of the welding rod products and the related patent documents in the prior art are that the strength grade of the welding seam is not matched with the austenitic light steel body material of 450MPa grade, or the Al content in the welding seam possibly caused by the condition of high Al content of the light steel cannot be solved 2 O 3 More impurities are mixed, and the mechanical property is seriously reduced. Therefore, the search for a special low-hydrogen type welding rod matched with the 450MPa grade high-strength austenite lightweight steel is just needed in the market.
Disclosure of Invention
The invention aims to provide a low-hydrogen type welding rod applicable to austenitic light steel and a manufacturing process thereof, which solve the requirements of high-efficiency and high-quality welding engineering of 450MPa grade high-strength austenitic light steel and overcome the defects and hidden troubles of the prior art.
The invention relates to a low-hydrogen type welding rod applicable to austenitic light steel, which structurally comprises an alloy core wire and a coating attached to the outer surface of the core wire, and is characterized in that the alloy core wire comprises the following chemical components in percentage by mass: 0.40 to 0.55 percent of C, 20 to 28 percent of Mn, 0.8 to 1.2 percent of Si, 2.0 to 5.0 percent of Cr, 1.0 to 3.0 percent of Ni, 0.5 to 3.5 percent of Mo, less than or equal to 0.005 percent of P, less than or equal to 0.003 percent of S, and the balance of iron and inevitable impurities.
In order to ensure the quality of a welding seam transition layer, the chemical components of the matched coating are specially improved and designed: comprises the following components in percentage by mass: 40-48% of marble powder, 20-25% of fluorite powder, 4.0-6.0% of titanium dioxide, 2.0-7.0% of magnesium-aluminum alloy powder, 2.0-4.0% of potassium feldspar powder, 1.0-4.0% of rare earth ferrosilicon powder, 0.5-4.5% of nickel powder, 2.0-3.5% of zircon sand, 0.2-4.0% of low-carbon ferrochrome powder, 0.4-1.0% of molybdenum, 1.0-2.0% of ferrotitanium, 2.0-6.0% of electrolytic manganese, 1.0-3.0% of potassium carbonate, 0.5-1.0% of soda, 1.5-2.0% of mica, 1.0-2.0% of sodium alginate and the balance of Fe powder.
The key of the low-hydrogen type welding rod applicable to the austenitic light steel is that the alloy core wire and the coating are formed into the low-hydrogen type welding rod by the following improved process steps, and the improved key process steps comprise:
(1) Hot rolling the wire rod: proportioning the raw materials of the alloy welding core, and hot-rolling the raw materials into a wire rod with the diameter phi of 7.5mm, wherein the hot-rolling technological parameters are as follows: heating at 1200 +/-20 ℃, keeping the temperature for 1h, keeping the outlet temperature of a rolling high-speed wire at 1050 +/-30 ℃, keeping the spinning temperature at more than or equal to 970 ℃, cooling the rolled wire rod in water, and keeping the water inlet temperature at more than or equal to 950 ℃;
(2) Annealing and drawing: annealing and then drawing the wire rod with the diameter of 7.5mm obtained in the step (1), wherein the specific procedures comprise rough drawing, solid solution, surface cleaning and fine drawing, and finally preparing an alloy welding core with the diameter of 3.2 mm; the solid solution treatment is to heat to 1050-1100 ℃, preserve heat for 1h and then cool to room temperature by water;
(3) Pressing and coating a coating: firstly, the chemical components of the coating are mixed, the binder is added and stirred evenly, the mixture is coated on the surface of the alloy core wire under pressure, and finally the low-hydrogen type welding rod is prepared by means of drying and positioning.
In the process of the invention, a large amount of data is obtained in experimental engineering through a large amount of experiments and improvements, and the following technological parameters in workpiece welding construction are summarized by combining specific engineering application practices: when in welding, the temperature between the layers of the workpieces is controlled to be less than or equal to 80 ℃, the welding current is 90-110A, the arc voltage is 26-28V, the welding speed is 10-12 cm/min, and the welding heat input value is 15-18 kJ/cm.
The low-hydrogen type welding rod for the austenitic light steel and the preparation method thereof are determined by counting and thinning a large amount of test data. Including the range of chemical composition mass percent in the welding rod, the specific standard conditions in the application and construction thereof and the actually achieved technical effect, can refer to the following explanations.
(1) The welding rod can effectively weld high-strength light steel with high manganese and high carbon, is particularly used for important construction occasions of high-strength austenitic light steel with the intensity of 450MPa, can obtain a welding joint and a welding seam with the intensity and the toughness matched with that of the body steel, and meets the high-quality requirement of construction of key projects.
(2) Manganese is an austenite stable element and can still maintain a full austenite structure at room temperature, the manganese content in weld metal formed by the welding rod is equivalent to that of light steel, and the concentration gradient of the manganese element cannot be generated.
(3) The invention adopts Si and Mn to carry out a random linkage deoxidation mechanism, thereby effectively avoiding excessive Al element in the matrix from being oxidized into Al 2 O 3 The inclusion is formed, thereby restricting the technical index of the welding seam from seriously reducing. The proper Si can also ensure that the molten state formed by the alloy welding core and the matched welding flux in the online use has good fluidity, and can keep the technical indexes of good morphological characteristics and low-temperature toughness of a welding line in the solid state.
(4) The welding rod of the invention contains a proper amount of Mo element in chemical components, and has excellent hot crack resistance sensitivity when welding is carried out under a specified welding process.
(5) The welding process is excellent: less splashing, excellent slag detachability and beautiful weld formation.
How the objects of the invention are achieved is further illustrated below with reference to specific examples.
Detailed Description
First, the innovative technical means, including principles and mechanisms, given by the present invention are further explained, and the list of examples refers to the core nodes of the inventive technical innovation, and the detailed implementation and the comparison of specific randomly selected comparative examples are given. However, the scope of the data selected in the tables 1 and 2 of the present embodiment does not limit the new boundary of the inventive technique, and it determines the combination pattern of the specific values for the data interval of the above embodiment. In the examples, the alloy core wire and the matched coating are shown in the following tables 1 and 2, and the comparative example is a test scheme randomly selected for researching and confirming the influence of the change of the data parameters of the key components on the invention, and is specifically described herein. The mechanical properties of the examples and comparative examples are shown in Table 3.
The invention confirms the function and mechanism of the chemical components of the alloy core wire and the flux coating:
mn: the austenite structure stabilizing factor can enlarge an austenite phase region and reduce a ferrite phase region, and promotes deposited metal to keep an austenite structure at room temperature and low temperature. The higher Mn content is beneficial to obtaining a single-phase austenite structure, thereby ensuring the toughness of the deposited metal. However, as the manganese content increases, weld formation deteriorates, hot crack sensitivity increases, and the addition of manganese is not likely to increase. Therefore, the mass percent of manganese is verified to be 20-28% through repeated tests.
C: c is a very significant element for stabilizing austenite and strengthening solution treatment, and increasing the content of C can increase the strength of the deposited metal. However, if the C content is too high, the weld tends to crack, and C forms gases such as CO and CO2 during welding, resulting in increased spatter during welding operation. Therefore, the mass percent of C is verified and adjusted to be 0.45-0.55% through repeated experiments.
Si: the fluidity of the deposited metal is improved, the forming quality of the welding seam is improved, and the deoxidation effect is realized by the combined regulation of the molten metal and manganese. However, when the content of silicon exceeds 1.4/wt%, segregation in the welded joint is caused, so that low-temperature impact strength is reduced, and welding crack sensitivity is adversely affected. Therefore, in the present invention, the content of silicon is controlled to 0.8 to 1.2% by mass after repeatedly comparing the test data.
Cr: the chromium can obviously improve the tensile strength of the welding line and can also improve the oxidation resistance of the welding line. However, when the Cr content is large, ferrite is generated and the austenite single-phase structure characteristics cannot be maintained. Therefore, the optimal addition amount of the chromium element in the invention is 2.0-4.0 percent by mass.
Ni: austenite stabilizing elements and a small amount of nickel elements can improve the low-temperature toughness of the deposited metal on the premise of reducing the cost. The adding amount of the nickel element is controlled to be 1.0-5.0 percent by mass, which is the best choice.
Mo: the proper amount of molybdenum element can ensure the strength of the matrix and reduce the solidification temperature range, thereby effectively reducing or avoiding the generation of solidification cracks. However, excessive Mo causes a large amount of carbide to be precipitated at grain boundaries, resulting in a sharp drop in the impact strength of the weld. Therefore, the optimal adding amount of the molybdenum element is 0.5-3.0 percent by mass, which is an important technical node for the invention.
The following is a description of the action and mechanism of the chemical components of the skin of the present invention:
marble powder: the decomposed CaO can stabilize electric arc and has good desulfurizing effect. Marble and fluorite are suitably present in a ratio of 2:1. the optimum adding amount of the marble powder is 40-48 percent.
Fluorite powder: fluorite is used as a slagging agent, plays a role in reducing the melting point of low-melting slag and diluting the slag, and can improve the slag removal performance. The marble and fluorite are suitably added in a ratio of 2:1. the optimal addition amount of the fluorite powder is 20-25%.
Titanium dioxide: improve the fluidity of the molten pool, optimize the physical and chemical properties of the slag and form a composite thin-layer slag with sodium alginate and mica. The optimal addition amount of the titanium dioxide in the invention is 4.0-6.0%.
Magnesium-aluminum alloy: the strong deoxidizer can produce low-temperature impact toughness on the welding line, reduce the burning loss of carbon content and improve the transition rate of carbon elements. The optimal addition amount of the magnesium-aluminum alloy in the invention is 2.0-7.0%.
Rare earth silicon iron: the impact toughness is improved by thinning the structure. The optimal addition amount of the rare earth ferrosilicon in the invention is 1.0-4.0%.
Zircon sand: the melting point and the viscosity of the slag are adjusted, and the all-position weldability is improved. The optimal addition amount of the zircon sand in the invention is 2.0-3.5%.
Potassium feldspar: the slag forming agent and the arc stabilizer have the functions of improving the viscosity and the surface tension of the slag. The best adding amount of the potassium feldspar in the invention is 2.0-4.0%.
Potassium carbonate: the electric arc can be stabilized, the splashing can be reduced, and the welding manufacturability can be optimized. The best adding amount of the potassium carbonate in the invention is 1.0-3.0%.
Mica: the titanium pigment and the sodium alginate form composite thin-layer slag, the melting point of the slag is adjusted, the density of the slag is increased, and the slag detachability is improved. The optimal addition amount of the mica in the invention is 1.5-2.0%.
Sodium alginate: gas making, early deoxidation effect, na can improve arc stability, and forms composite thin layer slag with titanium dioxide and mica. The best adding amount of the sodium alginate in the invention is 1.0-2.0%.
Based on the above description of the action and mechanism, and in conjunction with specific experimental data and engineering applications, the examples of the invention are summarized as follows:
TABLE 2 Table of the components (mass percent) of the coating
In the comparative examples, the chemical composition of the core wire is shown in Table 1, and the chemical composition of the sheath is shown in Table 2.
The alloy welding core material selected in the table is hot rolled into a wire rod with the diameter phi of 7.5mm, then is annealed and drawn to a straight rod with the diameter phi of 3.2mm, and is processed into a comparative welding rod according to the matched surface components of the welding core. Welding a high-strength austenitic light steel plate with the thickness of 20mm by adopting a manual arc welding method, wherein the high-strength light steel comprises the following components in percentage by weight: 22-25%, C:0.6 to 1.0%, al:5 to 8 percent; and (3) testing the mechanical property and the mechanical property of the formed connecting piece: rp0.2: 440-510 MPa, rm: 700-850 MPa, A: 30-50% and-40 deg.C KV2: 150-260J.
The test plate groove type of the high-strength austenite lightweight steel is V-shaped, the single-side groove angle is 30 degrees, and the specific welding technological parameters are as follows: preheating is not carried out before welding, the interlayer temperature is less than or equal to 80 ℃, the welding current is 90-110A, the arc voltage is 26-28V, the welding speed is 10-12 cm/min, and the welding heat input is 15-18 kJ/cm.
And (3) detecting and analyzing the welded weld metal microstructure and mechanical property of the comparative example: the weld metal is a fully austenitic structure; no solidification crack and reheating crack are generated; the yield strength of the weld metal is 406MPa, the tensile strength is 624MPa, the elongation A =30%, and-40 ℃ KV2:55J.
Compared with the examples, the comparative example has lower content of Si, slag inclusion exists between welding beads with poor flowability of deposited metal in the welding process of the light steel, al in a matrix can be transited into welding seams to form a large amount of Al2O3 inclusions, and the strength, the elongation and the toughness of a welding joint are seriously influenced. The obtained conclusion provides a powerful hint for confirming the key nodes of the innovative technical means of the invention.
Claims (3)
1. A low-hydrogen type welding rod suitable for austenitic light steel structurally comprises an alloy core wire and a coating attached to the outer surface of the alloy core wire, and is characterized in that: the alloy core wire comprises the following chemical components in percentage by mass: 0.40 to 0.55 percent of C, 20 to 28 percent of Mn, 0.8 to 1.2 percent of Si, 2.0 to 5.0 percent of Cr, 1.0 to 3.0 percent of Ni, 0.5 to 3.0 percent of Mo, less than or equal to 0.005 percent of P, less than or equal to 0.003 percent of S, and the balance of iron and inevitable impurities;
the chemical components of the coating comprise the following components in percentage by mass: 40-48% of marble powder, 20-25% of fluorite powder, 4.0-6.0% of titanium dioxide, 2.0-7.0% of magnesium-aluminum alloy powder, 2.0-4.0% of potassium feldspar powder, 1.0-4.0% of rare earth ferrosilicon powder, 0.5-4.5% of nickel powder, 2.0-3.5% of zircon sand, 0.2-4.0% of low-carbon ferrochrome powder, 0.4-1.0% of molybdenum, 1.0-2.0% of ferrotitanium, 2.0-6.0% of electrolytic manganese, 1.0-3.0% of potassium carbonate, 0.5-1.0% of soda, 1.5-2.0% of mica, 1.0-2.0% of sodium alginate and the balance of Fe powder.
2. The low-hydrogen welding electrode for austenitic light steel as defined in claim 1, wherein: the alloy core wire and the coating are formed into the low-hydrogen type welding rod by the following process steps:
(1) Hot rolling the wire rod: proportioning the raw materials of the alloy welding core, and hot-rolling the raw materials into a wire rod with the diameter phi of 7.5mm, wherein the hot-rolling technological parameters are as follows: heating at 1200 +/-20 ℃, keeping the temperature for 1h, keeping the outlet temperature of a rolling high-speed wire at 1050 +/-30 ℃, keeping the spinning temperature at more than or equal to 970 ℃, cooling the rolled wire rod in water, and keeping the water inlet temperature at more than or equal to 950 ℃;
(2) Annealing and drawing: annealing and then drawing the wire rod with the diameter of 7.5mm obtained in the step (1), wherein the specific procedures comprise rough drawing, solid solution, surface cleaning and fine drawing, and finally preparing an alloy welding core with the diameter of 3.2 mm; the solid solution is heated to 1050-1100 ℃, the temperature is kept for 1 hour, and then the water is cooled to the room temperature;
(3) Pressing and coating a coating: firstly, mixing the ingredients according to the chemical components of the coating, adding a binder, stirring uniformly, coating the mixture on the outer surface of the alloy core wire under pressure, and finally, drying and positioning to prepare the low-hydrogen type welding rod.
3. The low-hydrogen type welding electrode for austenitic light steel according to claim 1, wherein: the application construction welding process parameters comprise: the interlayer temperature of the welded workpiece is less than or equal to 80 ℃, the welding current is 90-110A, the arc voltage is 26-28V, the welding speed is 10-12 cm/min, and the welding heat input is 15-18 kJ/cm.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07251294A (en) * | 1994-03-14 | 1995-10-03 | Kobe Steel Ltd | Low hydrogen type coated electrode |
| JPH10263879A (en) * | 1997-03-21 | 1998-10-06 | Nippon Steel Corp | Coated electrode for high nitrogen austenitic stainless steel |
| RU2268128C1 (en) * | 2004-08-17 | 2006-01-20 | Федеральное Государственное Унитарное Предприятие "Центральный Научно-Исследовательский Институт Конструкционных Материалов "Прометей" (Фгуп "Цнии Км "Прометей") | Electrode for welding high-strength steels of pearlite and austenite classes |
| CN106984918A (en) * | 2017-05-15 | 2017-07-28 | 北京金威焊材有限公司 | The nickel-base welding rod ENiCrMo 3 of inverse proportion alkaline low-hydrogen type coating |
| CN107127475A (en) * | 2017-03-23 | 2017-09-05 | 武汉铁锚焊接材料股份有限公司 | A kind of austenite stainless steel-made welding rod of resistance to non-oxidizable acid corrosion and its application |
| CN107971656A (en) * | 2017-11-27 | 2018-05-01 | 四川大西洋焊接材料股份有限公司 | Clean martensitic stain less steel alkalescence welding rod of the resistance to husky water erosion of high-strength and high-plasticity and preparation method thereof |
| CN110170765A (en) * | 2019-05-24 | 2019-08-27 | 四川大西洋焊接材料股份有限公司 | The mating acidic electrode of high Manganese Austenitic Cryogenic Steels of LNG storage tank peculiar to vessel and preparation method |
| CN111618479A (en) * | 2020-06-28 | 2020-09-04 | 昆山京群焊材科技有限公司 | Welding rod for 5% Ni steel and preparation method thereof |
| CN111644775A (en) * | 2020-06-18 | 2020-09-11 | 昂科万德(武汉)科技有限公司 | 800MPa high-strength steel welding rod and preparation method thereof |
| JP2020189302A (en) * | 2019-05-17 | 2020-11-26 | 日鉄溶接工業株式会社 | Arc welding rod coated with low hydrogen-based coating agent for crude oil tank steel |
| CN114273817A (en) * | 2022-01-24 | 2022-04-05 | 昆山京群焊材科技有限公司 | Austenitic stainless steel welding rod for hydrogen energy |
-
2022
- 2022-04-29 CN CN202210463967.8A patent/CN114905187B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07251294A (en) * | 1994-03-14 | 1995-10-03 | Kobe Steel Ltd | Low hydrogen type coated electrode |
| JPH10263879A (en) * | 1997-03-21 | 1998-10-06 | Nippon Steel Corp | Coated electrode for high nitrogen austenitic stainless steel |
| RU2268128C1 (en) * | 2004-08-17 | 2006-01-20 | Федеральное Государственное Унитарное Предприятие "Центральный Научно-Исследовательский Институт Конструкционных Материалов "Прометей" (Фгуп "Цнии Км "Прометей") | Electrode for welding high-strength steels of pearlite and austenite classes |
| CN107127475A (en) * | 2017-03-23 | 2017-09-05 | 武汉铁锚焊接材料股份有限公司 | A kind of austenite stainless steel-made welding rod of resistance to non-oxidizable acid corrosion and its application |
| CN106984918A (en) * | 2017-05-15 | 2017-07-28 | 北京金威焊材有限公司 | The nickel-base welding rod ENiCrMo 3 of inverse proportion alkaline low-hydrogen type coating |
| CN107971656A (en) * | 2017-11-27 | 2018-05-01 | 四川大西洋焊接材料股份有限公司 | Clean martensitic stain less steel alkalescence welding rod of the resistance to husky water erosion of high-strength and high-plasticity and preparation method thereof |
| JP2020189302A (en) * | 2019-05-17 | 2020-11-26 | 日鉄溶接工業株式会社 | Arc welding rod coated with low hydrogen-based coating agent for crude oil tank steel |
| CN110170765A (en) * | 2019-05-24 | 2019-08-27 | 四川大西洋焊接材料股份有限公司 | The mating acidic electrode of high Manganese Austenitic Cryogenic Steels of LNG storage tank peculiar to vessel and preparation method |
| CN111644775A (en) * | 2020-06-18 | 2020-09-11 | 昂科万德(武汉)科技有限公司 | 800MPa high-strength steel welding rod and preparation method thereof |
| CN111618479A (en) * | 2020-06-28 | 2020-09-04 | 昆山京群焊材科技有限公司 | Welding rod for 5% Ni steel and preparation method thereof |
| CN114273817A (en) * | 2022-01-24 | 2022-04-05 | 昆山京群焊材科技有限公司 | Austenitic stainless steel welding rod for hydrogen energy |
Non-Patent Citations (1)
| Title |
|---|
| 双金属复合剪刃;赵品等;《金属热处理》;19961230;第15-16页 * |
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