CN114289929A - MIG welding solid welding wire for high-manganese austenite low-temperature steel and welding process thereof - Google Patents
MIG welding solid welding wire for high-manganese austenite low-temperature steel and welding process thereof Download PDFInfo
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Abstract
The invention relates to a MIG welding solid-core welding wire for high-manganese austenitic low-temperature steel and a welding process thereof. The technical scheme is as follows: the solid welding wire for MIG welding of the high-manganese austenitic low-temperature steel comprises the following chemical components: c is 0.20-0.60 wt%; si is less than or equal to 0.05 wt%; mn is 20-32 wt%; ni is 0.1-2 wt%; 0.1-1.8 wt% of Cr; cu is 0.55-1.00 wt%; w is 0.5-1.9 wt%; mo accounts for 1.3-3.0 wt%; 0.5-2 wt% of Al; nb + V + Ti + B + RE is less than or equal to 0.5 wt%; p is less than or equal to 0.002 wt%; s is less than or equal to 0.001 wt%; the balance being Fe and unavoidable impurities. The invention can realize full-automatic and all-position welding, and has high welding efficiency, good molding and excellent mechanical property; the weld metal strength formed by adopting the inert gas protection is matched with the high manganese austenite low-temperature steel, the forming is good, the low-temperature toughness is excellent, and the technical requirements of the strength and the ultralow-temperature toughness of the LNG storage tank at the working temperature of-196 ℃ can be met.
Description
Technical Field
The invention belongs to the technical field of solid welding wires for Metal Inert Gas (MIG) welding. In particular to a MIG welding solid-core welding wire for high manganese austenite low-temperature steel and a welding process thereof.
Background
In recent years, with the rapid development of clean energy of liquefied natural gas (abbreviated as LNG, the same applies hereinafter), LNG storage and transportation equipment (with a service temperature of-196 ℃) presents an unprecedented great demand. At present, the commercial LNG storage tank steel is 9Ni steel and is expensive, so that the development and development of novel low-temperature steel become important directions of all countries in the world. The high manganese steel with the manganese content of 22-25% has the same physical metallurgy characteristics with nickel, and the stacking fault energy of the steel is controlled to be 22-24 mJ/m by adding other alloy elements2Above, the microstructure is still stable austenite under the ultralow temperature condition of-196 ℃, thereby ensuring thatThe excellent comprehensive mechanical property at ultralow temperature is proved to be equivalent to that of 9Ni steel, so that the high-manganese austenitic low-temperature steel becomes a novel low-temperature steel material which has great competitiveness in the future and can replace the 9Ni steel for LNG storage and transportation equipment.
The matched welding material and welding process are one of key technologies for preparing LNG storage and transportation equipment, and determine the integrity of the whole structure and the safety of operation. In the prior art:
a low-hydrogen type welding rod (CN201910008172.6) for manual electric arc welding of high-manganese austenitic low-temperature steel discloses a manual electric welding rod matched with the high-manganese low-temperature steel, and the manual electric welding rod can realize all-position welding, but all adopts manual operation, so that the labor intensity is high, the labor cost is high, and the welding efficiency is low; the dust amount of the welding rod is large, which is not beneficial to the health of welders.
A technology FOR welding high-manganese ultralow-temperature steel wires and a welding process thereof (CN201710432013.X), a technology FOR welding solid welding wires FOR argon TUNGSTEN-arc welding FOR ultralow-temperature high-manganese steel (CN201710194207.0) and a technology FOR Korean patent of TUNGSTEN INERT GAS WELDING MATERIAL FOR HIGH MANGANESE STEEL (KR20140188144) disclose three welding wires and welding processes FOR argon TUNGSTEN-arc welding matched with high-manganese austenitic low-temperature steel.
A full-automatic submerged-arc welding wire and a welding flux for welding high-manganese austenitic low-temperature steel are disclosed, wherein the submerged-arc welding wire can only realize flat welding, and the full-automatic submerged-arc welding solid-core welding wire for welding the high-manganese austenitic low-temperature steel is disclosed. HIGH STRENGTH WELDING JOINT HAVING EXCELLENT IMPACTTOUGHNESS AT VERY LOW TEMPERATURE, AND FLUX-CORED ARC WELDING WIRE THEREFOR (US201816189232) US patent technology AND 'a consumable electrode gas shielded welding metal powder core FLUX-CORED wire for ultralow TEMPERATURE high manganese steel' (CN201910008171.1) patent technology disclose CO for high manganese LOW TEMPERATURE steel2Or CO2Though the flux-cored wire and the solid-cored wire protected by the Ar mixed gas can realize all-position high-efficiency welding, the flux-cored wire and the solid-cored wire have the problems of large smoke dust, large splashing, poor forming, low mechanical property of weld metal and the like.
At present, a Metal Inert Gas (MIG) welding wire for high-manganese austenitic low-temperature steel and a welding process technology thereof are not reported.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the MIG welding solid wire for the high manganese austenite low-temperature steel, which can realize full-automatic welding, high welding efficiency, full-position welding, good forming and excellent mechanical property; welding smoke is not generated in the welding process, and the construction environment is good; inert gas is adopted for protection during welding, and the formed weld metal strength is matched with high manganese austenite low-temperature steel, the forming is good, and the low-temperature toughness is excellent; can meet the technical requirements of the strength and the ultra-low temperature toughness of the LNG storage tank used at the working temperature of-196 ℃.
In order to achieve the purpose, the invention adopts the technical scheme that:
the solid welding wire for MIG welding of the high-manganese austenitic low-temperature steel comprises the following chemical components: c is 0.20-0.60 wt%; si is less than or equal to 0.05 wt%; mn is 20-32 wt%; ni is 0.1-2 wt%; 0.1-1.8 wt% of Cr; cu is 0.55-1.00 wt%; w is 0.5-1.9 wt%; mo accounts for 1.3-3.0 wt%; 0.5-2 wt% of Al; nb + V + Ti + B + RE is less than or equal to 0.5 wt%; p is less than or equal to 0.002 wt%; s is less than or equal to 0.001 wt%; the balance being Fe and unavoidable impurities.
The preparation method of the solid welding wire for MIG welding of the high manganese austenite low temperature steel comprises the following steps: the solid welding wire for MIG welding of the high manganese austenite low temperature steel is prepared by proportioning, smelting, forging, rolling, heat treatment, drawing, surface treatment and layer winding according to the chemical components of the solid welding wire.
For heightThe welding process of the MIG welding solid-core welding wire of the manganese austenite low-temperature steel adopts inert gas for protection; in an inert gas: ar is 91-99 Vol%, N21 to 4 Vol%, O20 to 5 Vol%.
The diameter of the MIG welding solid-core welding wire for the high-manganese austenite low-temperature steel is 1.0-2.0 mm.
The high-manganese austenite low-temperature steel used for the high-manganese austenite low-temperature steel is 6-20 mm thick.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following positive effects:
the protective gas component mainly containing the inert gas Ar is adopted, so that the alloy elements in the welding wire are ensured to be transferred into a molten pool to the maximum extent to form weld metal. Adding 1-4 Vol% of N into protective gas2Gases, on the one hand protective, and on the other hand partly N which decomposes at high temperatures2The gas enters the weld metal to play a role in solid solution strengthening. When the protective gas is not added with O2When in gas, the gas is protected by pure inert gas, and the molten drops are mainly in short circuit transition. When a small amount of O is added2On one hand, the gas plays a role in reducing the surface tension and realizes good molding; on the other hand, when welding wires with diameters of 1.0mm and 1.2mm are adopted for welding, the arc voltage is matched with 18-19V, so that molten drops are mainly in a short circuit transition mode, all-position welding is realized, and good welding seam forming of single-side welding and double-side forming can be realized; when welding wires with diameters of 1.6mm and 2.0mm are adopted for welding, the arc voltage is matched with the arc voltage of 24-26V, molten drops can be transited to a molten pool in a jet flow transition mode, all-position welding of horizontal welding, transverse welding and vertical welding is achieved, and good welding seam forming is formed.
Based on protective gas mainly containing inert gas Ar, C, Mn, Ni and Cu in chemical components of the solid welding wire adopted by the invention are all austenite stable elements, and the design that C is 0.20-0.60 wt%, Mn is 20-32 wt%, Ni is 0.1-2 wt% and Cu is 0.55-1.00 wt% is adopted, so that the weld metal formed at-196 ℃ is still in a full austenite structure, and the fault energy is 22.5-23.8 mJ/m2Twins are the main component when external force is applied at low temperatureThe deformation mode ensures the comprehensive mechanical properties at ultralow temperature, including the impact toughness, strength and ductility at ultralow temperature.
Cr and Mo in the chemical components are used as main solid solution strengthening elements, and the yield strength of the formed weld metal at room temperature can reach more than 400MPa by adopting 0.1-1.8 wt% of Cr and 1.3-3.0 wt% of Mo.
W, Al, trace elements Nb + V + Ti + B + RE and the like in the chemical components are used as main precipitation strengthening elements and inclusion modification elements, and the yield strength and tensile strength of the formed weld metal at room temperature are further improved on the basis of solid solution strengthening by adopting the design that W is 0.5-1.9 wt%, Al is 0.5-2 wt% and Nb + V + Ti + B + RE is less than or equal to 0.5 wt%, and the ductility of the formed weld metal at low temperature is not damaged.
The Si element in the chemical components adopted by the invention plays a role in solid solution strengthening on one hand and adjusting the viscosity of liquid metal in a molten pool on the other hand. The Si content in the weld metal is too high, and although the strength can be improved, the ultralow temperature toughness can be reduced; the Si content in the weld metal is too low, so that the function of adjusting the viscosity of the liquid metal in a molten pool cannot be realized. Matched with the shielding gas of MIG welding by using small amount of O2The fluidity of the weld pool is improved and optimized, thereby ensuring that the weld metal has good formability. Therefore, the Si in the chemical composition of the solid welding wire is less than or equal to 0.05 wt%.
In the invention, the existence of impurity elements of sulfur and phosphorus enables weld metal to generate liquefaction cracks and reheating cracks, so the content of the sulfur and phosphorus elements is strictly controlled as follows: p is less than or equal to 0.002 wt% and S is less than or equal to 0.001 wt%. By purifying the molten steel, the contents of P and S in the welding wire are reduced to the minimum, the hot cracking tendency caused by P, S segregation is avoided, and the good weld metal quality is ensured.
Based on the composition design of the protective gas and the solid welding wire, welding smoke dust is not generated in the welding process, only a small amount of vapor of alloy elements is generated, the health protection of welders can be realized through proper protection, and the construction environment is good; the conventional MIG welding machine is adopted, the solid welding wire is used as an electrode, the solid welding wire can be quickly melted, the welding efficiency can be improved, and the full-automatic welding can be realized.
The MIG welding solid-core welding wire for the high-manganese austenite low-temperature steel prepared by the invention is used for consumable electrode inert gas shielded welding of the high-manganese austenite low-temperature steel, and weld metal forms a full austenite structure, so that excellent ultralow-temperature toughness is ensured, and the impact energy A at-196 ℃ is highkv68-90J; sufficient strength is also ensured: the yield strength is 420-460 MPa, the tensile strength is 670-730 MPa, the elongation A is 40-48%, and the mechanical property requirement and the ultra-low temperature toughness requirement of the high manganese austenite low-temperature steel at the working temperature of-196 ℃ are met.
Therefore, the invention has the characteristics of full-automatic welding, high welding efficiency, full-position welding, good forming and excellent mechanical property; welding smoke dust is not generated in the welding process, the construction environment is good, and the health protection of welders can be realized; the metal strength of the formed welding line is matched with that of high manganese austenite low-temperature steel, the forming is good, the low-temperature toughness is excellent, and a welding joint has the mechanical properties of high strength and excellent ultralow-temperature toughness; the invention can meet the technical requirements of the strength and the ultra-low temperature toughness of the LNG storage tank used at the working temperature of 196 ℃ below zero.
Detailed Description
The invention is further described with reference to specific embodiments, without limiting its scope.
In this embodiment:
the preparation method of the solid welding wire for MIG welding of the high manganese austenite low temperature steel comprises the following steps: the solid welding wire for MIG welding of the high manganese austenite low temperature steel is prepared by proportioning, smelting, forging, rolling, heat treatment, drawing, surface treatment and layer winding according to the chemical components of the solid welding wire.
The groove type of the test plate of the high manganese austenite low temperature steel is V-shaped, and the angle of a single-side groove is 30 degrees.
The high manganese austenite low temperature steel of the embodiment comprises the following chemical components: c is 0.35-0.55 wt%; 0.10-0.50 wt% of Si; mn is 22.5-25.5 wt%; 3.00-4.00 wt% of Cr; cu of 0.30-0.70 wt%; b is less than or equal to 0.005 wt%; n is less than or equal to 0.05 wt%; p is less than or equal to 0.005 wt%; s is less than or equal to 0.003 wt%. The mechanical properties of the high manganese austenite low temperature steel are as follows: the yield strength is more than or equal to 400 MPa; the tensile strength is more than or equal to 800 MPa; the elongation A is more than or equal to 22 percent; transverse impact energy A at-196 DEG Ckv≥27J。
Specifically, the chemical compositions of the high manganese austenitic low temperature steel employed in the 3 examples are: c is 0.45 wt%; si is 0.10 wt%; mn is 25 wt%; 4 wt% of Cr; cu is 0.50 wt%; b is 0.002 wt%; n is 0.05 wt%; p is 0.004 wt%; s is 0.003 wt%. The mechanical properties of the high manganese austenite low temperature steel are as follows: the yield strength is 475 MPa; the tensile strength is 810 MPa; the elongation A is 41 percent; transverse impact energy A at-196 DEG CkvIs 75J.
The detailed description is omitted in the embodiments.
Example 1
A MIG welding solid-core welding wire for high-manganese austenitic low-temperature steel and a welding process thereof.
The solid welding wire for MIG welding of the high-manganese austenitic low-temperature steel comprises the following chemical components: c is 0.20-0.30 wt%; si is 0.03-0.04 wt%; mn is 20-25 wt%; ni accounts for 1.2-2 wt%; 1.1-1.8 wt% of Cr; cu is 0.55-0.70 wt%; w is 1.0-1.5 wt%; mo accounts for 1.3-1.8 wt%; al accounts for 1.5-2.0 wt%; nb + V + Ti + B + RE is 0.25-0.5 wt%; p is less than or equal to 0.002 wt%; s is less than or equal to 0.001 wt%; the balance being Fe and unavoidable impurities.
The welding process of the MIG welding solid-core welding wire for the high-manganese austenite low-temperature steel adopts inert gas protection; in an inert gas: ar is 98 Vol%, N21 Vol%, O21% Vol; the height of a nozzle is 10-15 mm, the dry extension of a welding wire is 6-13 mm, the welding current is 40-150A, the arc voltage is 18-19V, the welding speed is 30-60 cm/min, the molten drop transition is short-circuit transition, and the welding position is the full position.
The diameter of the solid welding wire for MIG welding of the high manganese austenite low temperature steel is 1.0 mm.
The thickness of the high manganese austenite low temperature steel is 6 mm.
The welded weld metal microstructure and mechanical properties of the embodiment are detected and analyzed:the weld metal is a full austenite structure, and the weld metal is well formed; the yield strength of the weld metal is 428-450 MPa, the tensile strength is 682-714 MPa, the elongation A is 40-46%, and the average value A of transverse impact energy at-196 ℃ iskvIs 72-85J.
Example 2
A MIG welding solid-core welding wire for high-manganese austenitic low-temperature steel and a welding process thereof.
The solid welding wire for MIG welding of the high-manganese austenitic low-temperature steel comprises the following chemical components: c is 0.40-0.60 wt%; si is 0.04-0.05 wt%; mn is 28-32 wt%; ni is 0.1-0.5 wt%; 0.1-0.6 wt% of Cr; 0.70-0.85 wt% of Cu; w is 1.5-1.9 wt%; mo accounts for 1.8-2.3 wt%; al accounts for 1.0-1.5 wt%; nb + V + Ti + B + RE is less than or equal to 0.1 wt%; p is less than or equal to 0.002 wt%; s is less than or equal to 0.001 wt%; the balance of Fe and inevitable impurities;
the welding process of the MIG welding solid-core welding wire for the high-manganese austenite low-temperature steel adopts inert gas protection; in an inert gas: ar is 97 Vol%, N23 Vol%; the height of a nozzle is 10-15 mm, the dry extension of a welding wire is 6-13 mm, the welding current is 80-180A, the arc voltage is 18-19V, the welding speed is 30-60 cm/min, the molten drop transition is short-circuit transition, and the welding position is the full position.
The diameter of the solid welding wire for MIG welding of the high manganese austenite low temperature steel is 1.2 mm.
The thickness of the high manganese austenite low temperature steel is 12 mm.
The welded weld metal microstructure and mechanical properties of the embodiment are detected and analyzed: the weld metal is a full austenite structure, and the weld metal is well formed; the yield strength of the weld metal is 420-441 MPa, the tensile strength is 690-721 MPa, the elongation A is 43-48%, and the average value A of transverse impact energy at-196 ℃ iskvIs 75 to 90J.
Example 3
A MIG welding solid-core welding wire for high-manganese austenitic low-temperature steel and a welding process thereof.
The solid welding wire for MIG welding of the high-manganese austenitic low-temperature steel comprises the following chemical components: c is 0.30-0.40 wt%; si is less than or equal to 0.03 wt%; mn is 25-28 wt%; ni is 0.5-1.2 wt%; 0.6-1.1 wt% of Cr; 0.85-1.00 wt% of Cu; w is 0.5-1.0 wt%; mo accounts for 2.3-3.0 wt%; 0.5-1.0 wt% of Al; nb + V + Ti + B + RE is 0.1-0.25 wt%; p is less than or equal to 0.002 wt%; s is less than or equal to 0.001 wt%; the balance being Fe and unavoidable impurities.
The welding process of the MIG welding solid-core welding wire for the high-manganese austenite low-temperature steel adopts inert gas protection; in an inert gas: ar is 92 Vol%, N24 Vol%, O24 Vol%; the height of a nozzle is 20-25 mm, the dry extension of a welding wire is 7-15 mm, the welding current is 300-500A, the arc voltage is 24-26V, the welding speed is 30-60 cm/min, the molten drop transition is jet flow transition, and the welding positions are horizontal welding, horizontal welding and vertical welding.
The diameter of the MIG welding solid-core welding wire for the high-manganese austenitic low-temperature steel is 2.0 mm.
The high manganese austenite low-temperature steel used for the high manganese austenite low-temperature steel is 20mm thick.
The welded weld metal microstructure and mechanical properties of the embodiment are detected and analyzed: the weld metal is a full austenite structure, and the weld metal is well formed; the yield strength of the weld metal is 438-460 MPa, the tensile strength is 701-730 MPa, the elongation A is 42-47%, and the average value A of transverse impact energy at-196 ℃ iskvIs 68-72J.
Compared with the prior art, the specific implementation mode has the following positive effects:
the embodiment adopts the protective gas component which mainly comprises the inert gas Ar, so that the alloy elements in the welding wire are ensured to be transferred into a molten pool to the maximum extent to form weld metal. 1-4% of N is added into protective gas2And the gas ensures that the alloy elements in the welding wire are transferred into the molten pool to the maximum extent to form weld metal. 1-4% of N is added into protective gas2On one hand, the gas plays a role in protection, and on the other hand, the gas and part of N decomposed at high temperature enter the weld metal to play a role in solid solution strengthening. When the protective gas is not added with O2When in gas, the gas is protected by pure inert gas, and the molten drops are mainly in short circuit transition. When a small amount of O is added2Gas, on the one hand, acts to reduce surface tensionThe good molding is realized; on the other hand, when welding wires with diameters of 1.0mm and 1.2mm are adopted for welding, the arc voltage is matched with 18-19V, so that molten drops are mainly in a short circuit transition mode, all-position welding is realized, and good welding seam forming of single-side welding and double-side forming can be realized; when welding wires with diameters of 1.6mm and 2.0mm are adopted for welding, the arc voltage is matched with the arc voltage of 24-26V, molten drops can be transited to a molten pool in a jet flow transition mode, all-position welding of horizontal welding, transverse welding and vertical welding is achieved, and good welding seam forming is formed.
Based on a protective gas mainly containing inert gas Ar, C, Mn, Ni and Cu in chemical components of the solid welding wire adopted by the embodiment are all austenite stable elements, and the design that C is 0.20-0.60 wt%, Mn is 20-32 wt%, Ni is 0.1-2 wt% and Cu is 0.55-1.00 wt% is adopted, so that the weld metal formed at-196 ℃ is still in a fully austenitic structure, and the fault energy is 22.5-23.8 mJ/m2Twin crystals are used as a main deformation mode when external force is applied at low temperature, so that the comprehensive mechanical properties including ultra-low temperature impact toughness, strength and ductility are ensured.
Cr and Mo in the chemical components adopted by the embodiment are main solid solution strengthening elements, and the combined action of 0.1-1.8 wt% of Cr and 1.3-3.0 wt% of Mo enables the formed weld metal to reach the yield strength of more than 400MPa at room temperature.
W, Al, trace elements Nb + V + Ti + B + RE and the like in the chemical components are used as main precipitation strengthening elements and Banmen inclusion modification elements, and the yield strength and the tensile strength of the formed weld metal at room temperature are further improved on the basis of solid solution strengthening by adopting the design that W is 0.5-1.9 wt%, Al is 0.5-2 wt% and Nb + V + Ti + B + RE is less than or equal to 0.5 wt%, and the ductility of the formed weld metal at low temperature is not damaged.
The Si element in the chemical components adopted in the present embodiment plays a role of solid solution strengthening on one hand, and plays a role of adjusting the viscosity of the liquid metal in the molten pool on the other hand. The Si content in the weld metal is too high, and although the strength can be improved, the ultralow temperature toughness can be reduced;the Si content in the weld metal is too low, so that the function of adjusting the viscosity of the liquid metal in a molten pool cannot be realized. Matched with the shielding gas of MIG welding by using small amount of O2The fluidity of the weld pool is improved and optimized, thereby ensuring that the weld metal has good formability. Therefore, the solid wire of the present embodiment has a chemical composition with Si of 0.05 wt% or less.
In the embodiment, the existence of the impurity elements of sulfur and phosphorus enables the weld metal to generate a liquefaction crack and a reheating crack, so the embodiment strictly controls the contents of the sulfur and phosphorus elements: p is less than or equal to 0.002 wt% and S is less than or equal to 0.001 wt%. By purifying the molten steel, the contents of P and S in the welding wire are reduced to the minimum, the hot cracking tendency caused by P, S segregation is avoided, and the good weld metal quality is ensured.
Based on the composition design of the protective gas and the solid welding wire, welding smoke dust is not generated in the welding process, only a small amount of vapor of alloy elements is generated, the health protection of welders can be realized through proper protection, and the construction environment is good; the conventional MIG welding machine is adopted, the solid welding wire is used as an electrode, the solid welding wire can be quickly melted, the welding efficiency can be improved, and the full-automatic welding can be realized.
The MIG welding solid wire for the high-manganese austenite low-temperature steel prepared by the embodiment is used for consumable electrode inert gas shielded welding of the high-manganese austenite low-temperature steel, and weld metal forms a full austenite structure, so that excellent ultralow-temperature toughness is ensured, and the impact energy A at-196 ℃ is highkv68-90J; sufficient strength is also ensured: the yield strength is 420-460 MPa, the tensile strength is 670-730 MPa, the elongation A is 40-48%, and the mechanical property requirement and the ultra-low temperature toughness requirement of the high manganese austenite low-temperature steel at the working temperature of-196 ℃ are met.
Therefore, the specific embodiment has the characteristics of full-automatic welding, high welding efficiency, full-position welding, good forming and excellent mechanical property; welding smoke dust is not generated in the welding process, the construction environment is good, and the health protection of welders can be realized; the metal strength of the formed welding line is matched with that of high manganese austenite low-temperature steel, the forming is good, the low-temperature toughness is excellent, and a welding joint has the mechanical properties of high strength and excellent ultralow-temperature toughness; the specific implementation mode can meet the technical requirements on the strength and ultralow temperature toughness of the welded LNG storage tank applicable to the working temperature of-196 ℃.
Claims (2)
1. A MIG welding solid-core welding wire for high-manganese austenitic low-temperature steel is characterized by comprising the following chemical components in percentage by weight: 0.20 to 0.60 wt% of C, not more than 0.05 wt% of Si, 20 to 32 wt% of Mn, 0.1 to 2 wt% of Ni, 0.1 to 1.8 wt% of Cr, 0.55 to 1.00 wt% of Cu, 0.5 to 1.9 wt% of W, 1.3 to 3.0 wt% of Mo, 0.5 to 2 wt% of Al, not more than 0.5 wt% of Nb + V + Ti + B + RE, not more than 0.002 wt% of P, not more than 0.001 wt% of S, and the balance of Fe and inevitable impurities;
the preparation method of the solid welding wire for MIG welding of the high manganese austenite low temperature steel comprises the following steps: the solid welding wire for MIG welding of the high manganese austenite low temperature steel is prepared by proportioning, smelting, forging, rolling, heat treatment, drawing, surface treatment and layer winding according to the chemical components.
2. A welding process of a solid welding wire for MIG welding of high manganese austenitic low-temperature steel is characterized in that the welding process adopts inert gas for protection; in an inert gas: ar is 91-99 Vol%, N21 to 4 Vol%, O20 to 5 Vol%;
the diameter of the MIG welding solid-core welding wire for the high-manganese austenitic low-temperature steel is 1.0-2.0 mm;
the high-manganese austenite low-temperature steel used for the high-manganese austenite low-temperature steel is 6-20 mm thick.
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| CN114289930A (en) * | 2022-01-30 | 2022-04-08 | 武汉科技大学 | Laser-arc composite welding solid-core welding wire for high-manganese austenite low-temperature steel and welding process |
| CN114749827A (en) * | 2022-04-24 | 2022-07-15 | 燕山大学 | Solid welding wire and preparation method and application thereof |
| CN115041866A (en) * | 2022-06-30 | 2022-09-13 | 三一重机有限公司 | Gas shielded welding wire and application thereof in welding of low-alloy high-strength steel |
| CN116079278A (en) * | 2023-04-06 | 2023-05-09 | 中国科学院合肥物质科学研究院 | High-energy-absorption high-manganese steel solid welding wire and welding process thereof |
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| JP2000197971A (en) * | 1998-12-25 | 2000-07-18 | Nippon Sanso Corp | Shield gas for welding of austenitic stainless steel |
| CN107186382A (en) * | 2017-06-09 | 2017-09-22 | 南京钢铁股份有限公司 | A kind of high manganese ultralow temperature steel welding wire and its welding procedure |
| US20210323101A1 (en) * | 2018-08-23 | 2021-10-21 | Jfe Steel Corporation | Solid wire for gas metal arc welding |
| CN111805120A (en) * | 2020-07-31 | 2020-10-23 | 天津市永昌焊丝有限公司 | Consumable electrode solid welding wire for welding extremely-low-temperature austenite high-manganese steel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114289930A (en) * | 2022-01-30 | 2022-04-08 | 武汉科技大学 | Laser-arc composite welding solid-core welding wire for high-manganese austenite low-temperature steel and welding process |
| CN114749827A (en) * | 2022-04-24 | 2022-07-15 | 燕山大学 | Solid welding wire and preparation method and application thereof |
| CN114749827B (en) * | 2022-04-24 | 2022-12-20 | 燕山大学 | Solid welding wire and preparation method and application thereof |
| CN115041866A (en) * | 2022-06-30 | 2022-09-13 | 三一重机有限公司 | Gas shielded welding wire and application thereof in welding of low-alloy high-strength steel |
| CN116079278A (en) * | 2023-04-06 | 2023-05-09 | 中国科学院合肥物质科学研究院 | High-energy-absorption high-manganese steel solid welding wire and welding process thereof |
| CN116079278B (en) * | 2023-04-06 | 2023-12-08 | 中国科学院合肥物质科学研究院 | High-energy-absorption high-manganese steel solid welding wire and welding process thereof |
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