CN113458653A - Submerged-arc welding wire for ultralow-temperature high-manganese steel and preparation method - Google Patents
Submerged-arc welding wire for ultralow-temperature high-manganese steel and preparation method Download PDFInfo
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- CN113458653A CN113458653A CN202110739151.9A CN202110739151A CN113458653A CN 113458653 A CN113458653 A CN 113458653A CN 202110739151 A CN202110739151 A CN 202110739151A CN 113458653 A CN113458653 A CN 113458653A
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- 238000003466 welding Methods 0.000 title claims abstract description 79
- 229910000617 Mangalloy Inorganic materials 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000011572 manganese Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 10
- 238000007747 plating Methods 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 28
- 239000002184 metal Substances 0.000 abstract description 28
- 229910045601 alloy Inorganic materials 0.000 abstract description 11
- 239000000956 alloy Substances 0.000 abstract description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 24
- 229910000831 Steel Inorganic materials 0.000 description 18
- 239000010959 steel Substances 0.000 description 18
- 238000007711 solidification Methods 0.000 description 11
- 230000008023 solidification Effects 0.000 description 11
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 9
- 229910052759 nickel Inorganic materials 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 229910001566 austenite Inorganic materials 0.000 description 7
- 229910052748 manganese Inorganic materials 0.000 description 6
- 238000003303 reheating Methods 0.000 description 6
- 239000010953 base metal Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 239000003949 liquefied natural gas Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
Classifications
-
- 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
- B23K35/3073—Fe as the principal constituent with Mn as next major 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
- B23K35/40—Making wire or rods for soldering or welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a submerged arc welding wire for ultralow-temperature high manganese steel and a preparation method thereof, wherein the submerged arc welding wire comprises the following raw materials in parts by weight: 0.10-0.30 wt% of C, 24-26.5 wt% of Mn, 0.12-0.30 wt% of Si, 4.0-6.0 wt% of Ni, 4.0-6.0 wt% of Cr, less than or equal to 0.010 wt% of P, less than or equal to 0.006 wt% of S, and the balance of Fe and inevitable impurities. The raw materials are hot rolled into wire rods, then are subjected to multi-pass annealing and drawing to form straight strips, and copper is plated on the surfaces of the straight strips to prepare the welding wires. The welding wire prepared by the invention has the advantages of low cost and simple alloy component system, and the formed weld metal has excellent low-temperature toughness, the strength is matched with the ultralow-temperature high manganese steel, and the technical requirements on the welded strength and ultralow-temperature toughness suitable for the ultralow-temperature high manganese steel are met.
Description
Technical Field
The invention belongs to the technical field of submerged arc welding wires for high manganese steel, and particularly relates to a submerged arc welding wire for ultralow-temperature high manganese steel and a preparation method thereof.
Background
With the implementation of the ocean strategy and the new energy strategy, the demand for steel materials for low-temperature or ultra-low-temperature storage and transportation containers such as Liquefied Natural Gas (LNG) will be gradually increased in the next decades. At present, the steel used for LNG tanks is commercial 9Ni steel, which is expensive due to the high nickel content of up to 9%. In order to save Ni resources and reduce the cost of steel materials and the cost of energy storage and transportation, researchers are actively developing ultra-low temperature high manganese steel.
In the application process of the ultralow-temperature high manganese steel, when a welding process is adopted to prepare a structure and equipment, manual electrode arc welding and CO (carbon monoxide) are carried out2Gas shielded welding and submerged arc welding are common welding methods, and the CO matched with high-manganese low-temperature steel is not used for preparing the high-manganese low-temperature steel except manual arc welding at present2Gas shielded welding and submerged arc welding materials.
In engineering practice, the existing ultralow-temperature storage and transportation container is generally made of 9Ni steel, and welding materials matched with the container are all nickel-based welding wires, so that two problems exist: firstly, the nickel element content in the welding wire is 50-60%, and the price is high; secondly, the components of the base metal and the welding wire belong to different component systems, and the alloy content difference is large, so that element diffusion at a welding line of a welding joint can be caused, and the structure and the performance are changed.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a submerged-arc welding wire for ultralow-temperature high-manganese steel, which solves the problems that the existing nickel-based welding wire is not suitable for preparing submerged-arc welding matched with high-manganese low-temperature steel, and elements at a welding joint fusion line are easy to diffuse, so that the structure and the performance are influenced.
The technical scheme is as follows: the invention relates to a submerged arc welding wire for ultralow-temperature high manganese steel, which comprises the following raw materials in parts by weight: 0.10-0.30 wt% of C, 24-26.5 wt% of Mn, 0.12-0.30 wt% of Si, 4.0-6.0 wt% of Ni, 4.0-6.0 wt% of Cr, less than or equal to 0.010 wt% of P, less than or equal to 0.006 wt% of S, and the balance of Fe and inevitable impurities.
The invention relates to a preparation method of a submerged arc welding wire for ultralow-temperature high manganese steel.
Wherein the specification of the wire rod is phi 5.5mm, and the specification of the straight rod is phi 3.2 mm. The thickness of the copper plating layer is 0.19-0.23 micron.
Has the advantages that: compared with the prior art, the invention has the obvious advantages of low price of the adopted alloy elements, simple alloy component system and low preparation cost. The content of manganese in the formed weld metal is equivalent to that of the ultralow-temperature high-manganese steel, so that a component system basically identical to that of the base metal is ensured, and the change of microstructure and mechanical property near a fusion line formed by the diffusion of manganese elements is avoided when a welding joint is formed. The manganese element, the carbon element and the nickel element are austenite forming elements, and when a weld metal molten pool is solidified under the combined action, an austenite phase is used as a solidification initial phase and is kept to room temperature, so that weld metal with an austenite structure is formed, and the excellent ultralow-temperature toughness of the weld metal is ensured, and the impact energy Akv at-196 ℃ is 82-137J; sufficient strength is also ensured: the yield strength is 465-501 MPa, the tensile strength is 668-719 MPa, the elongation A is 38-42%, the mechanical property requirement and the ultralow-temperature toughness requirement of the ultralow-temperature high-manganese steel are met, the solidification temperature range is reduced, solidification cracks are avoided, meanwhile, the generation of liquefaction cracks and reheating cracks is reduced or prevented, and the weld metal has the mechanical property matched with the base metal.
According to the invention, 4.0-6.0 wt% of nickel element is added, so that the low-temperature impact property of the welding seam deposited metal is effectively improved while the solidification temperature range is reduced, solidification cracks are reduced and avoided. According to the invention, 0.12-0.30 wt% of silicon element is added, silicon is used as one of main alloy elements of the welding seam, the strong deoxidation effect is achieved, the toughness of steel can be obviously improved within a certain range, and meanwhile, the oxidation of Cr and Ni is reduced when the steel is transferred to the welding seam, the fluidity of a molten pool is improved, and the inclusion of the welding seam is reduced. However, as the silicon content increases, the toughness of the steel tends to increase first and then decrease, so the silicon content is controlled to be 0.12-0.30%.
Therefore, the invention has low preparation cost and simple alloy component system; the welding manufacturability is excellent; the formed weld metal has the characteristics of ultralow temperature and high toughness, the strength is matched with that of the ultralow temperature high manganese steel, and the welded joint has the mechanical properties of high strength and excellent ultralow temperature toughness and can meet the technical requirements on the strength and the ultralow temperature toughness of the welded ultralow temperature high manganese steel.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
Example 1
A submerged arc welding wire for ultralow-temperature high manganese steel comprises the following raw materials in percentage by weight: 0.12 wt% of C, 24.5 wt% of Mn, 0.18 wt% of Si, 5.0 wt% of Ni, 4.5 wt% of Cr, 0.010 wt% or less of P, 0.006 wt% or less of S, and the balance of Fe and inevitable impurities.
The raw materials are hot rolled into a wire rod with a phi 5.5mm specification, then are subjected to multi-pass annealing and drawing to a phi 3.2mm specification, and the surface of the wire rod is plated with 0.19-0.23 micron of copper to prepare the welding wire.
And welding the ultralow-temperature high manganese steel with the thickness of 24mm by adopting a submerged arc welding method. The ultralow-temperature high manganese steel comprises the following chemical components: 0.40 to 0.50 wt% of C, 0.10 to 0.20 wt% of Si, 20 to 28 wt% of Mn, 0.01 to 0.08 wt% of Ni, 0.005 wt% or less of P, and 0.003 wt% or less of S. The mechanical properties of the 25Mn ultralow-temperature steel are as follows: the tensile strength is more than or equal to 400MPa, the yield strength is more than or equal to 560MPa, and the elongation A is 40 percent; the impact energy Akv is more than or equal to 54J at the temperature of 196 ℃ below zero. The groove type of the test plate of the ultra-low temperature high manganese steel is X-shaped, and the angle of a single-side groove is 30 degrees. When welding, the welding wire is matched with a welding flux, and welding is carried out at the heat input of 20-40 KJ/cm and the speed of 400 mm/min.
The welded weld metal microstructure and mechanical properties of the embodiment are detected and analyzed: the weld metal is a fully austenitic structure; no solidification crack and reheating crack are generated; the yield strength of the weld metal is 481-496 MPa, the tensile strength is 672-707 MPa, the elongation A is 39-41%, and the average value Akv of the impact energy at-196 ℃ is 87-122J.
The experimental results of this example show that: after the welding wire for submerged arc welding suitable for the ultralow-temperature high-manganese steel prepared from the steel raw materials is subjected to submerged arc welding, the mechanical property of a welding line deposited metal completely meets the technical requirement of the ultralow-temperature high-manganese steel, and a welding joint meets the technical requirement of an ultralow-temperature high-manganese steel preparation structure.
Example 2
A submerged arc welding wire for ultralow-temperature high manganese steel comprises the following raw materials in percentage by weight: 0.25 wt% of C, 25.5 wt% of Mn, 5.0 wt% of Ni, 5.0 wt% of Cr, 0.20 wt% of Si, 0.010 wt% or less of P, 0.006 wt% or less of S, and the balance of Fe and inevitable impurities.
The raw materials are hot rolled into a wire rod with a phi 5.5mm specification, then are subjected to multi-pass annealing and drawing to a phi 3.2mm specification, and the surface of the wire rod is plated with 0.19-0.23 micron of copper to prepare the welding wire.
And welding the ultralow-temperature high manganese steel with the thickness of 24mm by adopting a submerged arc welding method. The ultralow-temperature high manganese steel comprises the following chemical components: 0.40 to 0.50 wt% of C, 0.10 to 0.20 wt% of Si, 20 to 28 wt% of Mn, 0.01 to 0.08 wt% of Ni, 0.005 wt% or less of P, and 0.003 wt% or less of S. The mechanical properties of the 25Mn ultralow-temperature steel are as follows: the tensile strength is more than or equal to 400MPa, the yield strength is more than or equal to 560MPa, and the elongation A is 40 percent; the impact energy Akv is more than or equal to 54J at the temperature of 196 ℃ below zero. The groove type of the test plate of the ultra-low temperature high manganese steel is X-shaped, and the angle of a single-side groove is 30 degrees. When welding, the welding wire is matched with a welding flux, and welding is carried out at the heat input of 20-40 KJ/cm and the speed of 400 mm/min.
The welded weld metal microstructure and mechanical properties of the embodiment are detected and analyzed: the weld metal is a fully austenitic structure; no solidification crack and reheating crack are generated; the yield strength of the weld metal is 101-137 MPa, the tensile strength is 699-719 MPa, the elongation A is 38-41%, and the average value Akv of the impact energy at-196 ℃ is 82-116J.
Example 3
A submerged arc welding wire for ultralow-temperature high manganese steel comprises the following raw materials in percentage by weight: 0.10 wt% of C, 25 wt% of Mn, 5.5 wt% of Ni, 4.3 wt% of Cr, 0.18 wt% of Si, 0.010 wt% or less of P, 0.006 wt% or less of S, and the balance of Fe and inevitable impurities.
The raw materials are hot rolled into a wire rod with a phi 5.5mm specification, then are subjected to multi-pass annealing and drawing to a phi 3.2mm specification, and the surface of the wire rod is plated with 0.19-0.23 micron of copper to prepare the welding wire.
And welding the ultralow-temperature high manganese steel with the thickness of 24mm by adopting a submerged arc welding method. The ultralow-temperature high manganese steel comprises the following chemical components: 0.40 to 0.50 wt% of C, 0.10 to 0.20 wt% of Si, 20 to 28 wt% of Mn, 0.01 to 0.08 wt% of Ni, 0.005 wt% or less of P, and 0.003 wt% or less of S. The mechanical properties of the 25Mn ultralow-temperature steel are as follows: the tensile strength is more than or equal to 400MPa, the yield strength is more than or equal to 560MPa, and the elongation A is 40 percent; the impact energy Akv is more than or equal to 54J at the temperature of 196 ℃ below zero. The groove type of the test plate of the ultra-low temperature high manganese steel is X-shaped, and the angle of a single-side groove is 30 degrees. When welding, the welding wire is matched with a welding flux, and welding is carried out at the heat input of 20-40 KJ/cm and the speed of 400 mm/min.
The welded weld metal microstructure and mechanical properties of the embodiment are detected and analyzed: the weld metal is a fully austenitic structure; no solidification crack and reheating crack are generated; the yield strength of the weld metal is 465-487 MPa, the tensile strength is 668-703 MPa, the elongation A is 40-42%, and the average value Akv of the impact energy at-196 ℃ is 94-137J.
The above examples show that: the invention has the advantages of low content and price of the alloy elements, simple alloy component system and low preparation cost. The content of Mn, which is a main alloy element, is 24-26.5 wt%, and the content of the formed weld metal is equivalent to that of the manganese of the ultralow-temperature high-manganese steel, so that a component system basically identical to that of a base metal is ensured, and the change of the structure and the performance near a fusion line formed by the diffusion of the manganese element is avoided when a welding joint is formed. The manganese element, the carbon element and the nickel element in the invention are austenite forming elements, and when a weld metal molten pool is solidified under the combined action, the austenite phase is used as a solidification initial phase and is kept to room temperature, so that weld metal with an austenite structure is formed. The weld metal has the mechanical property matched with the parent metal. According to the invention, 0.12-0.30 wt% of silicon element is added, silicon is used as one of main alloy elements of the welding seam, the strong deoxidation effect is achieved, the toughness of steel can be obviously improved within a certain range, and meanwhile, the oxidation of Cr and Ni is reduced when the steel is transferred to the welding seam, the fluidity of a molten pool is improved, and the inclusion of the welding seam is reduced. However, as the silicon content increases, the toughness of the steel tends to increase first and then decrease, so the silicon content is controlled to be 0.12-0.30%. In addition, the existence of impurity elements of sulfur and phosphorus enables weld metal to generate liquefaction cracks and reheating cracks, so the invention strictly controls the contents of the sulfur and phosphorus elements: p is less than or equal to 0.010wt percent, and S is less than or equal to 0.006wt percent. The chemical component system adopted by the invention enables the weld metal structure to be fully austenitic, thereby not only ensuring that the weld metal has excellent ultralow-temperature toughness and enough strength, but also reducing the solidification temperature range, avoiding the occurrence of solidification cracks, and simultaneously reducing or preventing the occurrence of liquefaction cracks and reheating cracks. The welding wire for submerged arc welding is used for welding ultralow-temperature high-manganese steel, and weld metal forms a full austenite structure, so that excellent ultralow-temperature toughness is guaranteed, and the impact energy Akv at-196 ℃ is 82-137J; sufficient strength is also ensured: the yield strength is 465-501 MPa, the tensile strength is 668-719 MPa, the elongation A is 38-42%, and the mechanical property requirement and the ultra-low temperature toughness requirement of the ultra-low temperature high manganese steel are met.
Therefore, the welding wire for submerged arc welding and the wire rod thereof have the advantages of low cost and simple alloy component system; the welding manufacturability is excellent; the formed weld metal has the characteristics of ultralow temperature and high toughness, the strength is matched with that of ultralow temperature high manganese steel, and the welded joint has the mechanical properties of high strength and excellent ultralow temperature toughness and can meet the technical requirements of the ultralow temperature high manganese steel on the strength and the ultralow temperature toughness of the weld and the welded joint.
Claims (5)
1. The submerged arc welding wire for the ultralow-temperature high-manganese steel is characterized by comprising the following raw materials in parts by weight: 0.10-0.30 wt% of C, 24-26.5 wt% of Mn, 0.12-0.30 wt% of Si, 4.0-6.0 wt% of Ni, 4.0-6.0 wt% of Cr, less than or equal to 0.010 wt% of P, less than or equal to 0.006 wt% of S, and the balance of Fe and inevitable impurities.
2. The method for preparing a submerged arc welding wire for ultralow temperature high manganese steel according to claim 1, wherein the welding wire is prepared by hot rolling the raw material into a wire rod, drawing the wire rod into a straight strip through multiple annealing, and plating copper on the surface.
3. The method for preparing a submerged arc welding wire for ultralow temperature high manganese steel according to claim 2, wherein the wire rod has a specification of Φ 5.5 mm.
4. The method for preparing a submerged arc welding wire for ultralow temperature high manganese steel according to claim 2, wherein the specification of the straight bar is Φ 3.2 mm.
5. The method for preparing a submerged arc welding wire for ultralow temperature high manganese steel according to claim 2, wherein the thickness of the copper plating layer is 0.19 to 0.23 μm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110739151.9A CN113458653A (en) | 2021-06-30 | 2021-06-30 | Submerged-arc welding wire for ultralow-temperature high-manganese steel and preparation method |
| PCT/CN2021/135207 WO2023273160A1 (en) | 2021-06-30 | 2021-12-03 | Submerged arc welding wire for ultra-low temperature high manganese steel, and preparation method |
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| CN202110739151.9A CN113458653A (en) | 2021-06-30 | 2021-06-30 | Submerged-arc welding wire for ultralow-temperature high-manganese steel and preparation method |
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| WO (1) | WO2023273160A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114227063A (en) * | 2021-12-23 | 2022-03-25 | 锦州公略焊接技术有限公司 | Welding wire for submerged arc welding, welding flux and preparation method thereof, submerged arc welding material and application thereof, welding joint and welding method |
| WO2023273159A1 (en) * | 2021-06-30 | 2023-01-05 | 南京钢铁股份有限公司 | Co2 gas shielded welding wire for ultra-low temperature high manganese steel and preparation method |
| WO2023273160A1 (en) * | 2021-06-30 | 2023-01-05 | 南京钢铁股份有限公司 | Submerged arc welding wire for ultra-low temperature high manganese steel, and preparation method |
| WO2023064450A1 (en) * | 2021-10-15 | 2023-04-20 | Lincoln Global, Inc. | High alloy welding wire with copper based coating |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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- 2021-06-30 CN CN202110739151.9A patent/CN113458653A/en active Pending
- 2021-12-03 WO PCT/CN2021/135207 patent/WO2023273160A1/en active Application Filing
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| CN107052618A (en) * | 2017-03-28 | 2017-08-18 | 武汉科技大学 | The potassium steel of LNG basins is prepared with full-automatic submerged arc welding solid core welding wire |
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| CN112846464A (en) * | 2021-01-04 | 2021-05-28 | 南京钢铁股份有限公司 | Submerged-arc welding method for high-manganese austenitic steel used at low temperature |
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