CN108672982B - Raw yarn for electric arc additive manufacturing of petroleum pipeline structural member - Google Patents
Raw yarn for electric arc additive manufacturing of petroleum pipeline structural member Download PDFInfo
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- CN108672982B CN108672982B CN201810824770.6A CN201810824770A CN108672982B CN 108672982 B CN108672982 B CN 108672982B CN 201810824770 A CN201810824770 A CN 201810824770A CN 108672982 B CN108672982 B CN 108672982B
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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
- B23K35/3066—Fe as the principal constituent with Ni as next major constituent
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- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
The invention belongs to the technical field of welding materials, and particularly relates to a raw yarn for electric arc additive manufacturing of a petroleum pipeline structural member, which comprises the following chemical components in percentage by weight: c: 0.09-0.15%, Mn: 1.0-2.0%, Si is less than or equal to 0.3%, P is less than or equal to 0.012%, S is less than or equal to 0.012%, Cr: 0.1-1.2%, Mo: 0.20-0.80%, Ni: 1.2-2.6%, Cu is less than or equal to 0.3%, Ti: 0.02-0.1% and the balance of iron. The raw yarn for the electric arc additive manufacturing of the petroleum pipeline structural member has good mechanical property and higher low-temperature impact toughness, and the tensile strength of the raw yarn is more than 680MPa, the low-temperature impact energy at minus 40 ℃ is ensured to be more than 150J, and the low-temperature impact energy at minus 60 ℃ is ensured to be more than 120J; the protofilament is matched with the special welding flux for additive manufacturing to print the petroleum pipeline structural member, and has the advantages of excellent printing process, attractive forming and fine and dense welding bead.
Description
Technical Field
The invention belongs to the technical field of welding materials, and particularly relates to a raw yarn for electric arc additive manufacturing of a petroleum pipeline structural member.
Background
With the rapid development of economy in China, the demand for petroleum and natural gas is more and more vigorous, the gas transmission projects of China, such as the east gas transmission project and the Russia gas transmission project are successively input, and in order to reduce operation cost, improve efficiency and improve the safety and reliability of a petroleum pipeline, the steel for the petroleum pipeline is required to have higher strength and higher low-temperature impact toughness. The three-way component of the oil pipeline and other structural components are usually formed by casting, and the cast components easily cause quality defects of shrinkage cavity, low impact toughness, low one-time yield and the like.
The electric arc additive manufacturing technology is a technological method for melting metal wire materials by utilizing an electric arc overlaying principle and directly manufacturing full-density three-dimensional metal parts under the control of a computer, can reduce working procedures, shorten the manufacturing period of products, has few product defects, can realize digital and intelligent manufacturing, and has better mechanical properties than a casting technology. Therefore, it is necessary to design a raw yarn for the electric arc additive manufacturing of a petroleum pipeline structural member so as to print the structural member of an oil pipeline in a mode of electric arc additive manufacturing, so that the problem of low primary yield can be solved, and the structural member can be ensured to have excellent low-temperature impact toughness.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the raw silk for the electric arc additive manufacturing of the petroleum pipeline structural part, which has good mechanical property and higher low-temperature impact toughness, and when the raw silk is matched with the special welding flux for additive manufacturing to print the petroleum pipeline structural part, the printing process is excellent, and the formed raw silk is attractive.
In order to achieve the purpose, the technical scheme of the invention is that the raw silk for the electric arc additive manufacturing of the petroleum pipeline structural member comprises the following chemical components in percentage by weight: c: 0.09-0.15%, Mn: 1.0-2.0%, Si is less than or equal to 0.3%, P is less than or equal to 0.012%, S is less than or equal to 0.012%, Cr: 0.1-1.2%, Mo: 0.20-0.80%, Ni: 1.2-2.6%, Cu is less than or equal to 0.3%, Ti: 0.02-0.1% and the balance of iron.
As a preferred embodiment, the raw filament for electric arc additive manufacturing of the petroleum pipeline structural member comprises the following chemical components in percentage by weight: c: 0.09%, Mn: 2.0%, Si: 0.1%, P: 0.003%, S: 0.004%, Cr: 0.6%, Mo: 0.30%, Ni: 1.2%, Cu: 0.05%, Ti: 0.02%, Fe: 95.833 percent.
As a preferred embodiment, the raw filament for electric arc additive manufacturing of the petroleum pipeline structural member comprises the following chemical components in percentage by weight: c: 0.15%, Mn: 1.0%, Si: 0.13%, P: 0.005%, S: 0.006%, Cr: 1.2%, Mo: 0.4%, Ni: 1.8%, Cu: 0.04%, Ti: 0.1%, Fe: 95.169 percent.
As a preferred embodiment, the raw filament for electric arc additive manufacturing of the petroleum pipeline structural member comprises the following chemical components in percentage by weight: c: 0.13%, Mn: 1.5%, Si: 0.06%, P: 0.004%, S: 0.006%, Cr: 0.1%, Mo: 0.80%, Ni: 2.6%, Cu: 0.1%, Ti: 0.08%, Fe: 94.62 percent.
Further, in the precursor, when the content of C is not higher than 0.13%, the content of Mn is not lower than 1.5%; when the C content is higher than 0.13%, the Mn content is lower than 1.5%.
Further, in the strand, when Mn is higher than 1.5%, the Ni content is lower than 1.8%.
Further, in the strand, when the Cr content is less than 0.6%, the Mo content is more than 0.4%.
Further, the filaments were matched with EAM F550 flux, a flux specific for additive manufacturingAnd (6) welding. The EAM F550 flux comprises the following components in percentage by weight: MgO: 21-29%; CaF2：21~28%；Al2O3：11~20%；ZrO2：3~6%；SiO2：10~16%；CaO：15~21%；Na3AIF6：1~4%；CaCO33-6%; 2-4% of yttrium oxide; TiO2: 2~4%；S≤0.01%、P≤0.01%。
The design principle of chemical components in the raw silk for the electric arc additive manufacturing of the petroleum pipeline structural member is as follows:
c, Mn is used for combined deoxidation, carbon is the strongest deoxidizer and is an important element for ensuring strength, but excessive carbon increases the brittleness of the deposited metal and reduces the ductility and plasticity, so a proper amount of Mn needs to be added for combined deoxidation to improve the strength, the proportion of C, Mn needs to be controlled in a proper range, and when the content of C is not higher than 0.13%, the content of Mn is not lower than 1.5%; when the content of C is higher than 0.13%, the content of Mn is lower than 1.5%, so that the carbon equivalent is controlled in a reasonable range, and the crack sensitivity coefficient and brittleness are reduced.
In the invention, a proper amount of alloying elements such as Ti, Mo, Ni, Cr and the like are added, and the alloying elements act together, so that a certain element cannot play a role singly, for example, the proper proportion can refine crystal grains, reduce the segregation of steel, reduce the tempering brittleness and improve the strength and the low-temperature impact toughness. Because Mn and Ni are austenitizing elements, when Mn is higher than 1.5 percent in order to ensure higher low-temperature impact toughness, the content of Ni is lower than 1.8 percent; and when the Cr content is less than 0.6%, the Mo content is more than 0.4% in order to secure proper strength.
Compared with the prior art, the invention has the following beneficial effects:
(1) the raw yarn for the electric arc additive manufacturing of the petroleum pipeline structural member has good mechanical property and higher low-temperature impact toughness, and the tensile strength of the raw yarn is more than 680MPa, the low-temperature impact energy at minus 40 ℃ is ensured to be more than 150J, and the low-temperature impact energy at minus 60 ℃ is ensured to be more than 120J;
(2) the protofilament for electric arc additive manufacturing of the petroleum pipeline structural part provided by the invention is matched with the special welding flux EAM F550 for additive manufacturing to print the petroleum pipeline structural part, and the printing process is excellent, the forming is attractive, and the welding bead is fine and dense.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment provides a raw yarn for electric arc additive manufacturing of a petroleum pipeline structural member, which comprises the following chemical components in percentage by weight: c: 0.09%, Mn: 2.0%, Si: 0.1%, P: 0.003%, S: 0.004%, Cr: 0.6%, Mo: 0.30%, Ni: 1.2%, Cu: 0.05%, Ti: 0.02%, Fe: 95.833 percent.
Example two
The embodiment provides a raw yarn for electric arc additive manufacturing of a petroleum pipeline structural member, which comprises the following chemical components in percentage by weight: c: 0.15%, Mn: 1.0%, Si: 0.13%, P: 0.005%, S: 0.006%, Cr: 1.2%, Mo: 0.4%, Ni: 1.8%, Cu: 0.04%, Ti: 0.1%, Fe: 95.169 percent.
EXAMPLE III
The embodiment provides a raw yarn for electric arc additive manufacturing of a petroleum pipeline structural member, which comprises the following chemical components in percentage by weight: c: 0.13%, Mn: 1.5%, Si: 0.06%, P: 0.004%, S: 0.006%, Cr: 0.1%, Mo: 0.80%, Ni: 2.6%, Cu: 0.1%, Ti: 0.08%, Fe: 94.62 percent.
Three-furnace wire steel is respectively smelted according to the formula of the wire provided by the first embodiment, the second embodiment and the third embodiment, and is annealed and drawn into wire for manufacturing the petroleum pipeline structural member arc additive, the wire material components are shown in table 1, and the chemical components and the mechanical properties of the deposited metal after the wire and the flux are used are respectively shown in table 2 and table 3.
As can be seen from table 3, the raw wires for manufacturing the petroleum pipeline structural member by electric arc additive manufacturing prepared in the first to third embodiments are matched with the welding flux for welding, so that the raw wires have good welding process properties such as slag removal, porosity resistance and spreading resistance, the welding bead has fine corrugation and beautiful appearance, and has good strength and high low-temperature impact toughness, and the tensile strength of the raw wires is greater than 680MPa, the low-temperature impact energy at minus 40 ℃ is ensured to be more than 150J, and the low-temperature impact energy at minus 60 ℃ is ensured to be more than 120J.
Compared with the prior art, the raw filament for electric arc additive manufacturing of the petroleum pipeline structural member provided by the embodiment of the invention has higher tensile strength and yield strength and lower low-temperature impact resistance temperature; the hardness is improved, and at the same time, the difficulty of higher low-temperature impact toughness is high when lower impact temperature is needed, in order to improve the impact toughness, the alkalinity of the matched flux is improved, the content of Ni is also improved in the protofilament, Ni is the best and effective method for improving the low-temperature impact toughness, and the strength can also be improved when the content of Ni is higher; the invention improves the strength by Cr, N and Mo, and also adds Cr.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. The raw silk for the electric arc additive manufacturing of the petroleum pipeline structural member is characterized by comprising the following chemical components in percentage by weight: more than 0.13 percent and less than or equal to 0.15 percent of C, more than or equal to 1.0 percent and less than or equal to 1.5 percent of Mn, less than or equal to 0.3 percent of Si, less than or equal to 0.012 percent of P, less than or equal to 0.012 percent of S, Cr: 0.1-1.2%, Mo: 0.20-0.80%, Ni: 1.2-2.6%, Cu is less than or equal to 0.3%, Ti: 0.02-0.1% and the balance of iron; in the protofilament, when the Cr content is lower than 0.6%, the Mo content is higher than 0.4%; the tensile strength of the protofilament stacked metal is more than 680MPa, the low-temperature impact energy at-40 ℃ is more than 150J, and the low-temperature impact energy at-60 ℃ is more than 120J.
2. The wire strand for electric arc additive manufacturing of the petroleum pipeline structural member as claimed in claim 1, comprising the following chemical components in percentage by weight: c: 0.15%, Mn: 1.0%, Si: 0.13%, P: 0.005%, S: 0.006%, Cr: 1.2%, Mo: 0.4%, Ni: 1.8%, Cu: 0.04%, Ti: 0.1%, Fe: 95.169 percent.
3. A strand for use in electric arc additive manufacturing of a petroleum pipe structural member as claimed in claim 1, wherein: the protofilament is matched with EAM F550 flux which is a special flux for additive manufacturing to be welded; the EAM F550 welding flux comprises the following components in percentage by weight: 21-29% of MgO and CaF221~28%，Al2O311~20%，ZrO23~6%，SiO210~16%，CaO 15~21%，Na3AIF61~4%，CaCO33-6%, yttrium oxide 2-4%, and TiO22~4%，S≤0.01%，P≤0.01%。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810824770.6A CN108672982B (en) | 2018-07-25 | 2018-07-25 | Raw yarn for electric arc additive manufacturing of petroleum pipeline structural member |
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| CN201810824770.6A CN108672982B (en) | 2018-07-25 | 2018-07-25 | Raw yarn for electric arc additive manufacturing of petroleum pipeline structural member |
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| CN108672982B true CN108672982B (en) | 2020-10-02 |
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| CN110172644B (en) * | 2019-06-03 | 2021-07-09 | 中国兵器科学研究院宁波分院 | High-strength steel wire for electric arc additive manufacturing and preparation method thereof |
| CN110523980B (en) * | 2019-08-14 | 2024-03-01 | 中国石油天然气集团有限公司 | Electrofusion additive manufacturing method for tee pipe fitting |
| CN113319429B (en) * | 2021-04-29 | 2023-02-21 | 中国石油天然气集团有限公司 | Wire material for low-temperature additive manufacturing and controlling grain size, and preparation and application thereof |
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| CN100441364C (en) * | 2006-09-13 | 2008-12-10 | 武汉钢铁(集团)公司 | High ductility buried arc welding wire for low-alloy super-strength steel |
| CN102101221B (en) * | 2009-12-16 | 2012-12-12 | 中国石油天然气集团公司 | Submerged-arc welding wire for X80 grade pipe fitting |
| CN102009285A (en) * | 2010-11-18 | 2011-04-13 | 中国石油天然气集团公司 | Submerged arc welding wire used for X80 pipe fitting |
| CN106312374B (en) * | 2016-09-18 | 2018-10-02 | 武汉铁锚焊接材料股份有限公司 | A kind of increasing material manufacturing low-silicon and low-phosphorous high toughness sintering solder and its application |
| CN107553001B (en) * | 2017-09-01 | 2021-03-26 | 武汉铁锚焊接材料股份有限公司 | Submerged arc welding wire for nuclear power component electric arc additive manufacturing |
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