CN110711971A - Single-side welding double-side forming efficient submerged arc welding flux for marine engineering - Google Patents
Single-side welding double-side forming efficient submerged arc welding flux for marine engineering Download PDFInfo
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- CN110711971A CN110711971A CN201910941390.5A CN201910941390A CN110711971A CN 110711971 A CN110711971 A CN 110711971A CN 201910941390 A CN201910941390 A CN 201910941390A CN 110711971 A CN110711971 A CN 110711971A
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- submerged arc
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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
- B23K35/362—Selection of compositions of fluxes
-
- 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
- B23K35/406—Filled tubular wire or rods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention provides a single-side welding double-side forming efficient submerged arc welding flux for marine engineering, which comprises the following components in parts by mass: 21-25 parts of magnesium oxide; 9-13 parts of calcium difluoride; 17-23 parts of aluminum oxide; 9-16 parts of silicon dioxide; 7-13 parts of titanium dioxide; 19-31 parts of iron powder; 1-3 parts of ferromolybdenum; 2-6 parts of ferrosilicon. The invention provides a single-side welding double-side forming efficient submerged arc welding flux for marine engineering, which ensures the comprehensive mechanical property of a welding line through the modes of alloy solid solution strengthening, fine grain strengthening and the like when the welding heat input is more than 8KJ/mm, particularly ensures that the impact absorption work toughness value is stable and higher than 34J at the low temperature of 20 ℃ below zero, and has more obvious dehydrogenation effect.
Description
Technical Field
The invention belongs to the technical field of solder research and development, and relates to a single-side welding double-side forming efficient submerged arc solder for marine engineering.
Background
At present, the existing single-side welding double-side forming domestic submerged-arc welding flux for marine engineering of ships is popularized and used in domestic shipyards. When the welding heat input is less than or equal to 8KJ/mm, the yield strength is more than or equal to 375MPa, the tensile strength is 490-660 MPa, the elongation is more than or equal to 22 percent, the impact absorption power at the low temperature of-20 ℃ is more than or equal to 34J, and the mechanical property of the cladding metal can meet the technical specification requirement of shipyards. However, when the welding heat input quantity of the prior domestic submerged-arc welding flux is more than 8KJ/mm, the comprehensive mechanical property of a welding seam is reduced, and particularly the impact absorption work toughness value at the low temperature of-20 ℃ is unstable, and the impact absorption work at the low temperature of-20 ℃ is lower than 34J.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a single-side welding and double-side forming efficient submerged arc welding flux for marine engineering, which is used for solving the defects that the comprehensive mechanical property of a welding seam is reduced when the welding heat input is more than 8KJ/mm, and particularly the impact absorption energy toughness value at the low temperature of-20 ℃ is lower than 34J in the prior art.
In order to achieve the above objects and other related objects, a first aspect of the present invention provides a single-side welding double-side forming efficient submerged arc welding flux for marine engineering, which comprises the following components by mass:
21-25 parts of magnesium oxide (MgO); calcium difluoride (CaF)2)9-13 parts;
aluminum oxide (Al)2O3)17-23 parts;
silicon dioxide (SiO)2)9-16 parts;
titanium dioxide (TiO)2)7-13 parts;
19-31 parts of iron powder (Fe);
1-3 parts of ferromolybdenum (MoFe);
2-6 parts of ferrosilicon (SiFe).
Preferably, the single-side welding double-side forming efficient submerged arc welding flux for marine engineering comprises the following components in parts by mass:
22-24 parts of magnesium oxide (MgO); calcium difluoride (CaF)2)10-12 parts;
aluminum oxide (Al)2O3)18-22 parts;
silicon dioxide (SiO)2)10-15 parts;
titanium dioxide (TiO)2)8-12 parts;
20-30 parts of iron powder (Fe);
1-2 parts of ferromolybdenum (MoFe);
3-5 parts of ferrosilicon (SiFe).
More preferably, the single-side welding double-side forming efficient submerged arc welding flux for marine engineering comprises the following components in parts by mass:
22 parts of magnesium oxide (MgO);
calcium difluoride (CaF)2)12 parts of (1);
aluminum oxide (Al)2O3)20 parts of (1);
silicon dioxide (SiO)2)13 parts;
titanium dioxide (TiO)2)10 parts of (A);
30 parts of iron powder (Fe);
2 parts of ferromolybdenum (MoFe);
3 parts of ferrosilicon (SiFe). More preferably, the single-side welding double-side forming efficient submerged arc welding flux for marine engineering comprises the following components in parts by mass:
20 parts of magnesium oxide (MgO);
calcium difluoride (CaF)2)10 parts of (A);
aluminum oxide (Al)2O3)22 parts of (A);
silicon dioxide (SiO)2)10 parts of (A);
titanium dioxide (TiO)2)8 parts of a mixture;
24 parts of iron powder (Fe);
2 parts of ferromolybdenum (MoFe);
4 parts of ferrosilicon (SiFe).
More preferably, the single-side welding double-side forming efficient submerged arc welding flux for marine engineering comprises the following components in parts by mass:
24 parts of magnesium oxide (MgO);
calcium difluoride (CaF)2)11 parts of (1);
aluminum oxide (Al)2O3)21 parts of (1);
silicon dioxide (SiO)2)12 parts of (1);
titanium dioxide (TiO)2)11 parts of (1);
26 parts of iron powder (Fe);
2 parts of ferromolybdenum (MoFe);
4 parts of ferrosilicon (SiFe).
The second aspect of the invention provides the use of the above-described submerged arc flux as a flux between welded metal sheets.
Preferably, the metal plate is a marine EH36 grade steel plate. In a third aspect, the invention provides a welded structure comprising the above-mentioned submerged arc welding flux. The invention provides a welding method of a single-side welding double-side forming efficient submerged arc welding agent for marine engineering, which is used for welding metal plates by matching the welding wire with the deposited metal of the welding agent.
Preferably, the welding conditions are: the welding mode is as follows: FCB; welding current: 800-900A; welding voltage: 35-45V; welding speed: 250-260 mm/min; welding heat input: 8.0-9.0 KJ/mm; groove clearance: 15-17 mm; groove angle: 15-25 degrees.
As mentioned above, the single-side welding double-side forming efficient submerged arc welding flux for marine engineering provided by the invention has the following beneficial effects:
(1) the invention provides a single-side welding double-side forming efficient submerged arc welding flux for marine engineering, which ensures the comprehensive mechanical property of a welding line, especially the impact absorption work toughness value at the low temperature of minus 20 ℃ is stable and higher than 34J through the modes of alloy solid solution strengthening, fine grain strengthening and the like when the welding heat input is more than 8 KJ/mm.
(2) The invention provides a single-side welding double-side forming efficient submerged arc welding flux for marine engineering, which is added with a proper amount of high-melting point oxides such as MgO and Al2O3To increase the melting point of the flux; adding an appropriate amount of high temperature viscosity increasing oxide such as SiO2、TiO2(ii) a The content of S, P in the weld metal can be controlled by the strongly basic oxide MgO with the melting point improved, the weld metal is purified, and the toughness of the weld metal is improved; adding a small amount of acidic SiO oxide which can increase the high-temperature viscosity of the slag2The over-high oxidizability of the welding flux can not be caused, so that the lower oxygen content of the welding seam is ensured; in order to reduce the diffused hydrogen in the weld metal, some CaF should be added2Especially with SiO2In the coexistence of the two, the dehydrogenation effect is more obvious.
(3) According to the single-side welding double-side forming efficient submerged arc welding flux for marine engineering, provided by the invention, the process performance can be improved and the deposition efficiency can be increased by adding the iron powder; adding ferrosilicon as a deoxidizer; ferromolybdenum is added as an alloying agent to improve the low-temperature impact toughness.
Detailed Description
The present invention is further illustrated below with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention.
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be understood that the processing equipment or devices not specifically mentioned in the following examples are conventional in the art; all pressure values and ranges refer to relative pressures.
Furthermore, it is to be understood that one or more method steps mentioned in the present invention does not exclude that other method steps may also be present before or after the combined steps or that other method steps may also be inserted between these explicitly mentioned steps, unless otherwise indicated; it is also to be understood that a combined connection between one or more devices/apparatus as referred to in the present application does not exclude that further devices/apparatus may be present before or after the combined device/apparatus or that further devices/apparatus may be interposed between two devices/apparatus explicitly referred to, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.
The present invention will be described in further detail with reference to examples.
Example 1
The invention provides a single-side welding double-side forming efficient submerged arc welding flux for marine engineering, which comprises the following components in parts by mass:
22 parts of magnesium oxide (MgO);
calcium difluoride (CaF)2)12 parts of (1);
aluminum oxide (Al)2O3)20 parts of (1);
silicon dioxide (SiO)2)13 parts;
titanium dioxide (TiO)2)10 parts of (A);
30 parts of iron powder (Fe);
2 parts of ferromolybdenum (MoFe);
3 parts of ferrosilicon (SiFe).
In the welding process, a single-power-supply double-wire submerged arc welding machine, an EH36 steel plate and a submerged arc welding wire with the thickness of 20mm are selected, a submerged arc welding wire with the model of H10Mn2 and the diameter of 5.0mm is selected according to the strength and toughness grade of the EH36 steel plate, the welding flux is matched with the submerged arc welding wire, and the welding wire is welded by using the traditional welding process of the FCB method. The welding specifications are shown in table 1 below.
The invention provides a single-side welding double-side forming efficient submerged arc welding flux for marine engineering, which comprises the following components in parts by mass:
20 parts of magnesium oxide (MgO);
calcium difluoride (CaF)2)10 parts of (A);
aluminum oxide (Al)2O3)22 parts of (A);
silicon dioxide (SiO)2)10 parts of (A);
titanium dioxide (TiO)2)8 parts of a mixture;
24 parts of iron powder (Fe);
2 parts of ferromolybdenum (MoFe);
4 parts of ferrosilicon (SiFe).
In the welding process, a single-power-supply double-wire submerged arc welding machine, an EH36 steel plate and a submerged arc welding wire with the thickness of 20mm are selected, a submerged arc welding wire with the model of H10Mn2 and the diameter of 5.0mm is selected according to the strength and toughness grade of the EH36 steel plate, the welding flux is matched with the submerged arc welding wire, and the welding wire is welded by using the traditional welding process of the FCB method. The welding specifications are shown in table 1 below.
Example 3
The invention provides a single-side welding double-side forming efficient submerged arc welding flux for marine engineering, which comprises the following components in parts by mass:
24 parts of magnesium oxide (MgO);
calcium difluoride (CaF)2)11 parts of (1);
aluminum oxide (Al)2O3)21 parts of (1);
silicon dioxide (SiO)2)12 parts of (1);
titanium dioxide (TiO)2)11 parts of (1);
26 parts of iron powder (Fe);
2 parts of ferromolybdenum (MoFe);
4 parts of ferrosilicon (SiFe).
In the welding process, a single-power-supply single-wire submerged arc welding machine and an EH36 steel plate are selected, the thickness of the steel plate is 20mm, a submerged arc welding wire with the model of H10Mn2 and the diameter of 5.0mm is selected from medium-smelting welding materials according to the strength and toughness grade of the EH36 steel plate, the welding flux is matched with the submerged arc welding wire, and the FCB method is used for welding and cladding the metal test plate. The welding specifications are shown in table 1 below.
TABLE 1
Example 4
The mechanical properties of the weld clad metals of examples 1-3 were tested to yield the data shown in table 2 below.
TABLE 2
From the mechanical property data of table 2 above, it can be seen that the solder of the present invention meets the standard requirements in terms of mechanical properties.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The submerged arc welding flux comprises the following components in parts by mass:
21-25 parts of magnesium oxide; 9-13 parts of calcium difluoride;
17-23 parts of aluminum oxide;
9-16 parts of silicon dioxide;
7-13 parts of titanium dioxide;
19-31 parts of iron powder;
1-3 parts of ferromolybdenum;
2-6 parts of ferrosilicon.
2. The submerged arc welding flux according to claim 1, characterized in that the submerged arc welding flux comprises the following components in parts by mass:
22-24 parts of magnesium oxide; 10-12 parts of calcium difluoride;
18-22 parts of aluminum oxide;
10-15 parts of silicon dioxide;
8-12 parts of titanium dioxide;
20-30 parts of iron powder;
1-2 parts of ferromolybdenum;
3-5 parts of ferrosilicon.
3. The submerged arc flux according to claim 2, characterized in that the submerged arc flux is selected from any one or more of the following proportions:
1) the submerged arc welding flux comprises the following components in parts by mass: 22 parts of magnesium oxide; 12 parts of calcium difluoride; 20 parts of aluminum oxide; 13 parts of silicon dioxide; 10 parts of titanium dioxide; 30 parts of iron powder; 2 parts of ferromolybdenum; 3 parts of ferrosilicon;
2) the submerged arc welding flux comprises the following components in parts by mass: 20 parts of magnesium oxide; 10 parts of calcium difluoride; 22 parts of aluminum oxide; 10 parts of silicon dioxide; 8 parts of titanium dioxide; 24 parts of iron powder; 2 parts of ferromolybdenum; 4 parts of ferrosilicon;
3) the submerged arc welding flux comprises the following components in parts by mass: 24 parts of magnesium oxide; 11 parts of calcium difluoride; 21 parts of aluminum oxide; 12 parts of silicon dioxide; 11 parts of titanium dioxide; 26 parts of iron powder; 2 parts of ferromolybdenum; 4 parts of ferrosilicon.
4. Use of a submerged arc welding flux according to any of claims 1-3 as a flux between welded metal sheets.
5. Use according to claim 4, wherein the metal sheet is a marine EH36 grade steel sheet.
6. A welded structure comprising the submerged arc welding flux of any one of claims 1-3.
7. A method of welding with a submerged arc welding flux, wherein a metal is deposited by the submerged arc welding flux as defined in any one of claims 1 to 3, and the metal is welded with a welding wire.
8. The method of claim 7, wherein the welding conditions are as follows: the welding mode is as follows: FCB; welding current: 800-900A; welding voltage: 35-45V; welding speed: 250-260 mm/min; welding heat input: 8.0-9.0 KJ/mm; groove clearance: 15-17 mm; groove angle: 15-25 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910941390.5A CN110711971A (en) | 2019-09-30 | 2019-09-30 | Single-side welding double-side forming efficient submerged arc welding flux for marine engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910941390.5A CN110711971A (en) | 2019-09-30 | 2019-09-30 | Single-side welding double-side forming efficient submerged arc welding flux for marine engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110711971A true CN110711971A (en) | 2020-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910941390.5A Withdrawn CN110711971A (en) | 2019-09-30 | 2019-09-30 | Single-side welding double-side forming efficient submerged arc welding flux for marine engineering |
Country Status (1)
| Country | Link |
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| CN (1) | CN110711971A (en) |
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2019
- 2019-09-30 CN CN201910941390.5A patent/CN110711971A/en not_active Withdrawn
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200601 Address after: 200941 Shanghai city Baoshan District Baoquan Road No. 1 Applicant after: MCC BAOSTEEL TECHNOLOGY SERVICES Co.,Ltd. Address before: Suzhou City, Jiangsu province 215333, Kunshan Development Zone, South Street Applicant before: KUNSHAN MCC BAOSTEEL WELDING CONSUMABLES Co.,Ltd. |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200121 |
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| WW01 | Invention patent application withdrawn after publication |