CN115625450A - High-manganese type austenite welding rod for welding Fe-Mn-Al series low-temperature steel and preparation thereof - Google Patents
High-manganese type austenite welding rod for welding Fe-Mn-Al series low-temperature steel and preparation thereof Download PDFInfo
- Publication number
- CN115625450A CN115625450A CN202211335530.2A CN202211335530A CN115625450A CN 115625450 A CN115625450 A CN 115625450A CN 202211335530 A CN202211335530 A CN 202211335530A CN 115625450 A CN115625450 A CN 115625450A
- Authority
- CN
- China
- Prior art keywords
- percent
- welding
- powder
- core wire
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 143
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 80
- 239000010959 steel Substances 0.000 title claims abstract description 80
- 239000011572 manganese Substances 0.000 title claims abstract description 42
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 41
- 229910018657 Mn—Al Inorganic materials 0.000 title claims abstract description 33
- 229910001566 austenite Inorganic materials 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 47
- 238000000576 coating method Methods 0.000 claims abstract description 47
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 33
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 28
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000676 Si alloy Inorganic materials 0.000 claims abstract description 7
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims abstract description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910001634 calcium fluoride Inorganic materials 0.000 claims abstract description 5
- 239000004579 marble Substances 0.000 claims abstract description 5
- 239000010453 quartz Substances 0.000 claims abstract description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 4
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 27
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 20
- 239000011575 calcium Substances 0.000 claims description 19
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 16
- 229910052791 calcium Inorganic materials 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 15
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 229910052717 sulfur Inorganic materials 0.000 claims description 12
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 238000003723 Smelting Methods 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 230000004907 flux Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 238000000889 atomisation Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 238000005482 strain hardening Methods 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 238000005097 cold rolling Methods 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 claims description 2
- 239000011812 mixed powder Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 26
- 239000002184 metal Substances 0.000 abstract description 26
- 238000005253 cladding Methods 0.000 abstract description 19
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000006477 desulfuration reaction Methods 0.000 abstract description 6
- 230000023556 desulfurization Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 description 15
- 239000002893 slag Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 9
- 239000011574 phosphorus Substances 0.000 description 9
- 239000011593 sulfur Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000010891 electric arc Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 229910000617 Mangalloy Inorganic materials 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000005275 alloying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000005272 metallurgy Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910018648 Mn—N Inorganic materials 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical compound [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
Images
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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
-
- 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)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention provides a high manganese type austenite welding rod for welding Fe-Mn-Al series low-temperature steel and a preparation method thereof, the high manganese type austenite welding rod comprises a core wire and a coating coated on the outer surface of the core wire, the core wire is made of Fe-Mn-Al steel, and the coating comprises the following components in percentage by weight: 5 to 10 percent of atomized magnesium calcium powder, 20 to 40 percent of marble, 10 to 20 percent of calcium fluoride, 5 to 10 percent of quartz, 5 to 20 percent of rutile, 5 to 10 percent of manganese-silicon alloy, 5 to 10 percent of nickel powder, 3 to 7 percent of ferroboron, 5 to 10 percent of ferrotitanium, and CrN 2 1 to 4 percent of the total weight of the raw materials, 0.5 to 1 percent of rare earth with more than 50 percent of Re, and the sum of the weight percent of the raw materials is 100 percent. The invention uses the existing Fe-Mn-Al steel to manufacture the welding core, carries out strong desulfurization and grain refinement on the cladding metal through metallurgical reaction, and the obtained cladding metal is an austenite structure and can meet the requirement of low-temperature steel in a low-temperature environment of-111 ℃.
Description
Technical Field
The invention relates to the technical field of welding materials, in particular to a high-manganese type austenite welding rod for welding Fe-Mn-Al series low-temperature steel and a preparation method thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The low-temperature steel refers to steel capable of stably working in a low-temperature environment, and can be used for manufacturing various production, storage and transportation equipment for liquid nitrogen, liquid ammonia, liquid oxygen and liquefied petroleum gas, equipment used in cold regions and the like. Due to the special characteristics of the use environment, the low-temperature steel is required to have certain toughness and strength under the low-temperature condition, and the toughness is particularly critical. The low-temperature steel commonly used at present comprises ferrite low-temperature steel and austenite low-temperature steel, and the austenite low-temperature steel has better low-temperature performance and is divided into Fe-Cr-Ni series, fe-Cr-Ni-Mn-N series and Fe-Mn-Al series austenite low-temperature nonmagnetic steel. The Fe-Mn-Al series austenite low-temperature non-magnetic steel is a new steel grade developed by China and capable of saving chromium and nickel, can partially replace chromium-nickel austenite steel and is used in an extremely low-temperature region below-111 ℃.
In the welding of low temperature steel, in order to ensure the low temperature performance of a weld bead, conventionally, a filler material containing nickel, such as a ferrite type containing 11% nickel, an austenite type containing 13 to 11% Ni, an Fe — Ni base type containing 40% Ni (Fe — Ni — Cr alloy), and an Ni base type containing 10% or more Ni (Ni — Cr — Mo alloy), is often used. In addition to the Ni-containing welding material, the high manganese type Fe-Mn-Al system can obtain a complete austenite structure. However, the toughness of high manganese austenitic steels undergoes a transition from toughness to brittleness with decreasing temperature, for example, for Mn contents of 10-27%, the epsilon martensite formed on the austenitic matrix is where cracks preferentially nucleate, without taking advantage of the low temperature toughness of the steel. In addition, the weld joint is mostly in an as-cast structure, and the low-temperature toughness is reduced by the segregation of components, the formation of MnS and the like which may exist, so that the Fe-Mn-Al is relatively less used for the welding material.
The manual electric arc welding has wide application in the low-temperature steel welding process due to flexible welding, so that the development of the high-manganese type welding rod for the low-temperature steel welding is of practical significance. The prior art is as follows:
a method for preparing a low-temperature steel welding rod by using a high-manganese core wire is disclosed in the patent application of an electric welding rod for high-manganese austenite low-temperature steel (CN 108171715B), wherein the sulfur content of the high-manganese core wire is less than 0.008 percent, and the phosphorus content of the high-manganese core wire is less than 0.01 percent; a method for preparing a low-temperature steel welding rod by using a high-manganese welding core is disclosed in the matching acidic welding rod and preparation method of high-manganese austenitic ultralow-temperature steel for a marine LNG storage tank (CN 110170715B), wherein the high-manganese welding core contains a small amount of nickel and does not contain aluminum, and meanwhile, the sulfur content is controlled to be 0.0021 percent and the phosphorus content is controlled to be 0.0071 percent;
a nickel-based welding rod for ultralow temperature steel with rare earth elements added in a core wire and a preparation method thereof (CN 101313313B) disclose a preparation method of a welding rod for low temperature steel with high nickel content; a nickel-based welding rod for ultralow temperature steel and a preparation method thereof (CN 105081113A) also relate to a welding rod for ultralow temperature steel prepared by adopting a nickel-based welding core; a welding rod matched with Ni-containing low-temperature steel (CN 103121017B) discloses a preparation method of a low-temperature steel welding rod which realizes that a weld cladding metal contains certain nickel through alloying; an electric arc welding method (CN 111515413B) suitable for Ni-saving type low-temperature steel welding rods adopts a welding core containing a certain amount of nickel to prepare the low-temperature steel welding rods; a low-temperature steel all-position welding rod and coating powder material (CN 105033502B) for welding a steel spherical tank is a welding rod for low-temperature steel prepared by adopting an H04E (low-carbon steel) core wire; a high-efficiency nickel-based welding rod (CN 103178322B) specially used for ultralow-temperature steel welding of an LNG ship is also a low-temperature steel welding rod adopting a high-nickel-content welding core.
From the prior art, most of low-temperature steel welding rods adopt a nickel-containing core wire to meet the low-temperature performance of a final welding seam, and a method of directly adopting a high-manganese core wire is also adopted, but the sulfur-phosphorus content of a welding material needs to be strictly controlled; at present, the sulfur content and the phosphorus content of high manganese steel can be controlled below 0.02 percent, but the requirements for welding materials are difficult to meet, and the high manganese steel needs to be further refined to reduce the sulfur and phosphorus content when being used for the welding materials, so that the cost of using a high manganese steel core as the welding materials is greatly increased.
Disclosure of Invention
In the aspect of reducing the sulfur and phosphorus content through the metallurgical reaction of welding, common alkaline oxides play a certain role, magnesium also has the function of desulfurization, but because of the activity of the magnesium, the magnesium is easy to oxidize and burn, and is not suitable for being directly added into the coating of the welding rod in large quantity for use.
In order to solve the defects of the prior art and to use the high manganese steel sold in the market at present as a welding core without further refining, the invention provides the high manganese type austenitic welding rod for welding Fe-Mn-Al series low-temperature steel and the preparation method thereof, the final sulfur and phosphorus content and the refined crystal grains of the cladding metal are reduced through the welding metallurgy reaction, and the low-temperature performance of the welding rod can meet the use requirement under the low-temperature environment of-111 ℃.
In order to realize the purpose, the technical scheme of the invention is as follows:
in a first aspect of the invention, a high manganese type austenite welding rod for welding Fe-Mn-Al series low-temperature steel is provided, which comprises a core wire and a coating coated on the outer surface of the core wire;
the welding core is made of Fe-Mn-Al steel;
the medicine skin comprises the following components in percentage by weight: 5 to 10 percent of atomized magnesium calcium powder, 20 to 40 percent of marble, 10 to 20 percent of calcium fluoride, 5 to 10 percent of quartz, 5 to 20 percent of rutile, 5 to 10 percent of manganese-silicon alloy, 5 to 10 percent of nickel powder, 3 to 7 percent of ferroboron, 5 to 10 percent of ferrotitanium, crN 2 1 to 4 percent of the total weight of the raw materials, 0.5 to 1 percent of rare earth with more than 50 percent of Re, and the sum of the weight percent of the raw materials is 100 percent.
In another aspect of the invention, a method for preparing a high manganese type austenite welding rod for welding Fe-Mn-Al series low-temperature steel is provided, which comprises the following steps: preparing a core wire, (2) preparing and coating a coating, and (3) welding the core wire and the coating.
The invention has the beneficial effects that:
(1) The requirement on the sulfur and phosphorus content of the welding core is greatly reduced by the combined desulfurization and dephosphorization of the atomized magnesium-calcium powder and other components, and the welding core can be prepared by using the high manganese steel commonly used at present;
(2) The low-temperature performance of the welding line is ensured by adopting means of component regulation, grain refinement and the like, and the low-temperature performance of a low-temperature steel welding joint at the temperature of-111 ℃ can be met;
(3) When the welding material is used for welding high-manganese type low-temperature steel, the components of a welding line are close to those of a base metal, so that the corrosion resistance is prevented from being reduced due to the formation of a large potential difference.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
Fig. 1 is a transmission electron microscope bright field image and a diffraction spot diagram of weld cladding metal obtained in example 1 of the present invention.
FIG. 2 is a transmission electron microscope high resolution image of weld cladding metal obtained in example X of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In order to use the high manganese steel which is sold on the market at present as a welding core without further refining, the invention provides a high manganese type austenite welding rod for welding Fe-Mn-Al series low-temperature steel, which reduces the final sulfur and phosphorus content of cladding metal and refines crystal grains through welding metallurgical reaction, so that the low-temperature performance of the high manganese type austenite welding rod can meet the use requirement under the low-temperature environment of-111 ℃.
In order to achieve the technical purpose, the invention provides a high-manganese type austenite welding rod for welding Fe-Mn-Al series low-temperature steel and a preparation method thereof.
In an exemplary embodiment of the present invention, there is provided a high manganese type austenitic electrode for welding Fe-Mn-Al series low temperature steel, the electrode including a core wire and a flux coating applied to an outer surface of the core wire;
the welding core is made of Fe-Mn-Al steel;
the medicine skin comprises the following components in percentage by weight: 5 to 10 percent of atomized magnesium calcium powder, 20 to 40 percent of marble, 10 to 20 percent of calcium fluoride, 5 to 10 percent of quartz, 5 to 20 percent of rutile, 5 to 10 percent of manganese-silicon alloy, 5 to 10 percent of nickel powder, 3 to 7 percent of ferroboron, 5 to 10 percent of ferrotitanium, and CrN 2 1 to 4 percent of the total weight of the raw materials, 0.5 to 1 percent of rare earth with more than 50 percent of Re, and the sum of the weight percent of the raw materials is 100 percent.
The welding electrode consists of two parts of a core wire and a coating.
When welding, the core wire has two functions: firstly, the welding current is conducted, electric arc is generated to convert electric energy into heat energy, and secondly, the welding core is melted to be used as filling metal to be fused with liquid base metal to form a welding seam.
The coating of the welding rod plays an extremely important arc stabilizing role in the welding process, so that the stable combustion of the welding arc is ensured, and the welding process is stable; protecting the arc and the molten pool. If a bare electrode without a coating is adopted for welding, in the welding process, a large amount of oxygen and nitrogen in the air can invade into molten metal, and metal iron and beneficial elements such as carbon, silicon, manganese and the like are oxidized and nitrided to form various oxides and nitrides which are remained in a welding line to cause slag inclusion or cracks of the welding line; the gas melted into the molten pool may cause a large amount of pores to be generated in the weld joint, and the factors can greatly reduce the mechanical properties (strength, impact value and the like) of the weld joint and simultaneously make the weld joint brittle. The gas generated after the welding rod coating is melted can isolate the air and avoid harmful gas from invading a molten pool; the coating participates in complex metallurgical reaction, and required alloy elements are infiltrated into weld metal through the coating to play a role in controlling chemical components of the weld so as to obtain the required weld metal performance.
In one or more embodiments of this embodiment, the core wire is 15Mn21Al4 steel.
In one or more embodiments of this embodiment, the 15Mn21Al4 steel comprises, in weight percent: 0.13 to 0.11 percent of C, 24.5 to 27 percent of Mn, 3.8 to 4.7 percent of Al, 0.3 to 0.1 percent of Si, 0.1 to 0.5 percent of V, 0.1 to 0.3 percent of Cu, less than 0.02 percent of S, less than 0.02 percent of P, and the balance of Fe and inevitable impurities.
In one or more embodiments of this embodiment, the coating comprises 35% to 40% by weight of the electrode.
In one or more embodiments of this embodiment, the mass ratio of magnesium powder to calcium powder in the atomized magnesium calcium powder is 18:2 to 10:10.
the function and principle of each component in the coating are explained as follows:
the atomized magnesium-calcium powder has the main functions of strong desulfurization and dephosphorization, replaces magnesium powder with strong combustibility, and solves the problem of poor welding manufacturability caused by easy combustion.
In order to solve the problem that magnesium powder is easy to burn and affects manufacturability, the invention firstly carries out alloying treatment on magnesium, the magnesium and calcium in weight are mixed (the calcium accounts for 2-10 percent of the total weight), the mixture is smelted in a vacuum furnace and made into powder by an atomization powder making method, the atomized powder is used for being added into a coating of a welding rod, the flammability of the magnesium powder after the calcium is added for alloying is greatly reduced, meanwhile, the calcium has the function of dephosphorization, and the sulfur and phosphorus content in cladding metal can be finally reduced by carrying out metallurgical reaction with other components in the coating, so that the low-temperature performance of the coating is ensured.
The marble is used as slag-forming and gas-forming agent in the welding rod making process, the gas decomposed in the welding process can generate certain blowing force to promote the transition of molten drops, the formed molten slag can protect a molten pool, and meanwhile, the Ca oxide has certain desulfurization and dephosphorization capability.
The calcium fluoride has the function of realizing dehydrogenation of the cladding metal by utilizing the reaction of fluorine and hydrogen and reducing the hydrogen content in the cladding metal.
The quartz is used as a slag former to improve weld formation and adjust the pH value and fluidity of slag.
The rutile is also a common slag former in welding rods, can stabilize electric arc, adjust the melting point, viscosity and fluidity of welding slag, and can obviously improve slag removal performance by adding a proper amount of the rutile to ensure that the welding slag and weld metal have larger thermal expansion coefficient difference.
The manganese-silicon alloy can be used for transferring certain manganese into cladding metal through electric arc metallurgy to adjust the manganese content in the cladding metal, and the manganese has the function of desulfurization. Compared with pure manganese powder, the manganese-silicon alloy has lower melting point and is beneficial to electric arc metallurgical reaction, and silicon in the manganese-silicon alloy has the function of adjusting the structure of a slag system and improves the fluidity of molten slag.
The nickel powder is used as an alloying transition element, the nickel content in the cladding metal is properly increased, the formation of austenite can be promoted, and the low-temperature impact toughness is improved.
Under the action of ferroboron, a small amount of boron is distributed at the grain boundary of the cladding metal, so that grains can be refined, the melting point of the cladding metal is reduced, the fluidity of the liquid metal is improved, and the formation of a welding seam is promoted.
The titanium iron has the effects that as the Fe-Mn-Al series welding core is adopted, the aluminum has higher oxidation tendency, in order to ensure the transition of the aluminum as much as possible, the added titanium iron can be used as a strong deoxidizer, the titanium is preferentially combined with the oxygen to form titanium oxide, the finally added titanium forms welding slag in the form of titanium oxide, a small amount of titanium is transited into cladding metal, and as the titanium is also a strong carbide element and can be combined with carbon to form finely dispersed titanium carbide, the carbon content in a matrix is reduced, the improvement of low-temperature impact toughness is facilitated, and the effect of refining grains can be achieved; the choice of ferrotitanium rather than pure titanium is made with a view to lowering the melting point of the forming liquid metal.
CrN 2 Adding CrN 2 The purpose of the method is to decompose certain nitrogen by using an arc metallurgy reaction, wherein the nitrogen is transferred into cladding metal and can promote the formation of tissue austenitization.
The Re is transferred into cladding metal through an arc metallurgy reaction and is gathered in a grain boundary, so that the effects of stabilizing the grain boundary and refining grains can be achieved, and finally the low-temperature impact toughness of a welding seam can be improved.
In another embodiment of the present invention, the preparation process is: preparing a core wire, (2) preparing and coating a coating, and (3) welding the core wire and the coating.
In one or more examples of this embodiment, the specific steps of (1) preparing the core wires are as follows:
hot rolling and cold rolling the 15Mn21Al4 steel to prepare the intermediate diameter; then drawing, wherein an annealing process is adopted in the drawing process to reduce the work hardening influence of the steel wire, and finally drawing is carried out until the standard diameter of the welding core is reached;
the middle diameter is phi 1 mm-phi 10mm, preferably phi 8mm;
the standard diameter of the core wire is phi 2 mm-phi 1mm, preferably phi 4mm.
In one or more examples of this embodiment, the (2) preparing the coating is as follows:
the components of the coating are proportioned according to the weight percentage, potassium-sodium water glass is added after the components are uniformly mixed, and the flux powder is coated on the outer surface of the standard core wire prepared according to the process by a welding rod coating press to prepare the coating; and then drying to obtain the high manganese type austenite welding rod.
In one or more embodiments of this embodiment, the coating ingredients include an atomized magnesium calcium powder prepared by:
mixing magnesium powder and calcium powder according to a certain mass ratio, smelting the mixed powder of magnesium and calcium in a vacuum smelting furnace to be liquid, and preparing the magnesium-calcium powder by a vacuum atomization method;
preferably, the mass ratio of the magnesium powder to the calcium powder is 18:2 to 10:10;
further preferably, the mass ratio of the magnesium powder to the calcium powder is 15:5.
in one or more embodiments of this embodiment, the (3) welding core wire and sheath are arc welded using manual welding;
preferably, the welding current is 180 + -5A,
preferably, the welding speed is 200mm/min.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
The invention relates to a high manganese type austenite welding rod for welding Fe-Mn-Al series low-temperature steel, which comprises a core wire and a coating coated on the outer surface of the core wire, wherein the preparation process of the core wire is described as follows:
selection of a core wire: commercially available Fe-Mn-Al steels are selected, for example, the commonly used 15Mn21Al4 steel is selected, and the weight percentage of the steel is as follows: 0.13 to 0.11 percent of C, 24.5 to 27 percent of Mn, 3.8 to 4.7 percent of Al, 0.3 to 0.1 percent of Si, 0.1 to 0.5 percent of V, 0.1 to 0.3 percent of Cu, less than 0.02 percent of S, less than 0.02 percent of P, and the balance of Fe and inevitable impurities. The main chemical components of the 15Mn21Al4 steel obtained in the examples are shown in Table 1.
Table 1: main chemical composition of core wire of example 1 (wt%)
| C | Mn | Si | Al | S | P | Fe | |
| 15Mn21Al4 steel | 0.18 | 25.5 | 0.3 | 4.2 | 0.018 | 0.02 | Balance of |
The 15Mn21Al4 steel is hot rolled and cold rolled to an intermediate diameter of phi 8mm, for example, and then is drawn, an annealing process is adopted in the drawing process to reduce the work hardening influence of the steel wire, and finally the steel wire is drawn to the core diameter of each standard electrode, and the phi 4mm is taken as an example for explanation.
The preparation method of the magnesium-calcium powder in the coating comprises the following steps: mixing 18 parts of magnesium powder and calcium powder in a certain weight ratio: 2 to 10:10, the following is 15:5 for illustration, the weight ratio of 15:5, mixing the magnesium powder and the calcium powder, smelting the mixture in a vacuum smelting furnace to be liquid, and preparing the magnesium-calcium powder by a vacuum atomization method.
The four groups of medicinal powders are uniformly mixed according to the weight percentage ratio of the components of the coating shown in the table 2, then potassium-sodium water glass is added, and the medicinal powders are pressed and coated on the outer surface of the welding core with phi 4mm prepared according to the process by a welding rod press-coating machine to prepare the coating. The coating weight coefficient is 0.35-0.4, the coating weight coefficients of No.1 and No.4 in the examples are 0.35, and the coating weight coefficients of No.2 and No.3 are 0.4. And then drying to obtain the high manganese type austenite welding rod.
Table 2: formulation of coating for welding rod of example 1 (wt%)
Adopting manual electric arc welding with welding current of 180 +/-5A and welding speed of 200mm/min, and adopting the 4 groups of high-manganese type austenitic electrodes to weld Fe-Mn-Al low-temperature steel. The main chemical components of the clad metal and the mechanical properties of the weld were measured, and the results are shown in tables 3 and 4.
Table 3: main chemical composition (weight percentage wt%) of cladding metal of example 1
Table 4: mechanical Properties of the weld of example 1
FIGS. 1 and 2 show the results of transmission electron microscopy of the sample of example No.1, which was determined to be an austenitic structure.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high manganese type austenite welding rod for welding Fe-Mn-Al series low temperature steel is characterized in that the welding rod comprises a core wire and a coating coated on the outer surface of the core wire;
the welding core is made of Fe-Mn-Al steel;
the coating comprises the following components in percentage by weight: 5 to 10 percent of atomized magnesium calcium powder, 20 to 40 percent of marble, 10 to 20 percent of calcium fluoride, 5 to 10 percent of quartz, 5 to 20 percent of rutile, 5 to 10 percent of manganese-silicon alloy, 5 to 10 percent of nickel powder, 3 to 7 percent of ferroboron, 5 to 10 percent of ferrotitanium, and CrN 2 1 to 4 percent of the total weight of the raw materials, 0.5 to 1 percent of rare earth with more than 50 percent of Re, and the sum of the weight percent of the raw materials is 100 percent.
2. The high manganese type austenitic electrode for welding Fe-Mn-Al series low temperature steel according to claim 1, wherein the core wire is 15Mn26Al4 steel.
3. The high manganese type austenitic electrode for welding Fe-Mn-Al series low temperature steel according to claim 2, wherein the 15Mn26Al4 steel comprises, in weight percent: 0.13 to 0.19 percent of C, 24.5 to 27 percent of Mn, 3.8 to 4.7 percent of Al, 0.3 to 0.6 percent of Si, 0.1 to 0.5 percent of V, 0.1 to 0.3 percent of Cu, less than 0.02 percent of S, less than 0.02 percent of P, and the balance of Fe and inevitable impurities.
4. The high manganese type austenitic electrode for welding Fe-Mn-Al series low temperature steel according to claim 1, wherein the flux coating comprises 35% to 40% of the electrode weight.
5. The high manganese type austenitic electrode for welding Fe-Mn-Al series low temperature steel according to claim 1, wherein the mass ratio of magnesium powder to calcium powder in the atomized magnesium calcium powder is 98:2 to 90:10.
6. the method for preparing the high manganese type austenite welding rod for welding Fe-Mn-Al series low temperature steel as claimed in claim 1 to 5, characterized in that the preparation process is as follows: preparing a core wire, (2) preparing and coating a coating, and (3) welding the core wire and the coating.
7. The method for preparing a high manganese type austenite welding rod for welding Fe-Mn-Al series low temperature steel according to claim 6, characterized in that the concrete steps of (1) preparing the core wire are as follows:
hot rolling and cold rolling the 15Mn26Al4 steel to prepare the intermediate diameter; then drawing, wherein an annealing process is adopted in the drawing process to reduce the work hardening influence of the steel wire, and finally drawing is carried out until the standard diameter of the welding core is reached;
the middle diameter is phi 6 mm-phi 10mm, preferably phi 8mm;
the standard diameter of the core wire is phi 2 mm-phi 6mm, preferably phi 4mm.
8. The method for preparing a high manganese type austenite welding rod for welding Fe-Mn-Al series low temperature steel according to claim 6, characterized in that the specific mode of preparing the coating in (2) is as follows:
the components of the coating are proportioned according to the weight percentage, potassium-sodium water glass is added after the components are uniformly mixed, and the flux powder is coated on the outer surface of the standard core wire prepared according to the process by a welding rod press coater to prepare the coating; and then drying.
9. The method for preparing a high manganese type austenite welding rod for welding Fe-Mn-Al series low temperature steel according to claim 8, wherein each component of the flux coating comprises atomized Mg-Ca powder, and the atomized Mg-Ca powder is prepared by the following steps:
mixing magnesium powder and calcium powder according to a certain mass ratio, smelting the mixed powder of magnesium and calcium in a vacuum smelting furnace to be liquid, and preparing the magnesium-calcium powder by a vacuum atomization method;
preferably, the mass ratio of the magnesium powder to the calcium powder is 98:2 to 90:10;
further preferably, the mass ratio of the magnesium powder to the calcium powder is 15:5.
10. the method for preparing a high manganese type austenitic electrode for welding low temperature steel of Fe-Mn-Al series according to claim 6, wherein (3) the welding core wire and the flux sheath are arc-welded by hand;
preferably, the welding current is 180 + -5A,
preferably, the welding speed is 200mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211335530.2A CN115625450B (en) | 2022-10-28 | 2022-10-28 | High manganese type austenitic welding rod for welding Fe-Mn-Al low temperature steel and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211335530.2A CN115625450B (en) | 2022-10-28 | 2022-10-28 | High manganese type austenitic welding rod for welding Fe-Mn-Al low temperature steel and preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115625450A true CN115625450A (en) | 2023-01-20 |
| CN115625450B CN115625450B (en) | 2024-06-18 |
Family
ID=84908783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211335530.2A Active CN115625450B (en) | 2022-10-28 | 2022-10-28 | High manganese type austenitic welding rod for welding Fe-Mn-Al low temperature steel and preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115625450B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2105243A1 (en) * | 2008-03-26 | 2009-09-30 | Nippon Steel & Sumikin Welding Co., Ltd. | Metal-based flux cored wire for Ar-CO 2 mixed gas shielded arc welding |
| CN101954554A (en) * | 2010-09-19 | 2011-01-26 | 山东建筑大学 | Acid electrode with good process performance |
| CN102554500A (en) * | 2010-12-28 | 2012-07-11 | 昆山京群焊材科技有限公司 | High-strength and high-toughness low alloy steel electric welding rod |
| CN105234592A (en) * | 2015-10-15 | 2016-01-13 | 洛阳双瑞特种合金材料有限公司 | High-strength-level single-side welding and double-side forming root welding welding bar |
| CN105880870A (en) * | 2016-05-24 | 2016-08-24 | 武汉铁锚焊接材料股份有限公司 | High-toughness heat-resisting steel welding rod |
| CN106825992A (en) * | 2017-01-20 | 2017-06-13 | 武汉铁锚焊接材料股份有限公司 | A kind of 620MPa grade low-temps steel flux-cored wire and its welding method |
| CN110682027A (en) * | 2019-09-17 | 2020-01-14 | 洛阳双瑞特种合金材料有限公司 | Electric welding rod with seamless welding core for high-manganese austenite low-temperature steel and preparation method |
| CN111761253A (en) * | 2020-06-22 | 2020-10-13 | 中国船舶重工集团公司第七二五研究所 | Seamless flux-cored wire for all-position welding of austenite ultralow-temperature steel and preparation method thereof |
| CN113458654A (en) * | 2021-06-30 | 2021-10-01 | 南京钢铁股份有限公司 | Ultralow-temperature high-manganese steel welding wire, welding rod and preparation method thereof |
| CN114871623A (en) * | 2022-06-09 | 2022-08-09 | 上海工程技术大学 | Graphene-containing high-crack-resistance high-manganese steel flux-cored wire and application thereof |
| CN114905187A (en) * | 2022-04-29 | 2022-08-16 | 燕山大学 | Low-hydrogen type welding rod applicable to austenitic light steel and preparation method |
-
2022
- 2022-10-28 CN CN202211335530.2A patent/CN115625450B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2105243A1 (en) * | 2008-03-26 | 2009-09-30 | Nippon Steel & Sumikin Welding Co., Ltd. | Metal-based flux cored wire for Ar-CO 2 mixed gas shielded arc welding |
| CN101954554A (en) * | 2010-09-19 | 2011-01-26 | 山东建筑大学 | Acid electrode with good process performance |
| CN102554500A (en) * | 2010-12-28 | 2012-07-11 | 昆山京群焊材科技有限公司 | High-strength and high-toughness low alloy steel electric welding rod |
| CN105234592A (en) * | 2015-10-15 | 2016-01-13 | 洛阳双瑞特种合金材料有限公司 | High-strength-level single-side welding and double-side forming root welding welding bar |
| CN105880870A (en) * | 2016-05-24 | 2016-08-24 | 武汉铁锚焊接材料股份有限公司 | High-toughness heat-resisting steel welding rod |
| CN106825992A (en) * | 2017-01-20 | 2017-06-13 | 武汉铁锚焊接材料股份有限公司 | A kind of 620MPa grade low-temps steel flux-cored wire and its welding method |
| CN110682027A (en) * | 2019-09-17 | 2020-01-14 | 洛阳双瑞特种合金材料有限公司 | Electric welding rod with seamless welding core for high-manganese austenite low-temperature steel and preparation method |
| CN111761253A (en) * | 2020-06-22 | 2020-10-13 | 中国船舶重工集团公司第七二五研究所 | Seamless flux-cored wire for all-position welding of austenite ultralow-temperature steel and preparation method thereof |
| CN113458654A (en) * | 2021-06-30 | 2021-10-01 | 南京钢铁股份有限公司 | Ultralow-temperature high-manganese steel welding wire, welding rod and preparation method thereof |
| CN114905187A (en) * | 2022-04-29 | 2022-08-16 | 燕山大学 | Low-hydrogen type welding rod applicable to austenitic light steel and preparation method |
| CN114871623A (en) * | 2022-06-09 | 2022-08-09 | 上海工程技术大学 | Graphene-containing high-crack-resistance high-manganese steel flux-cored wire and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115625450B (en) | 2024-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2734980C (en) | Pearlite rail having superior abrasion resistance and excellent toughness | |
| KR101159433B1 (en) | Low-hydrogen coated electrode | |
| JP4558780B2 (en) | Flux-cored wire for submerged arc welding of low-temperature steel | |
| CN102500950B (en) | Welding electrode for welding X65-grade pipeline steel | |
| CN102039498B (en) | Sintered flux for two phase stainless steel | |
| CN105290645A (en) | Electrode for high-strength steel welding and preparation method and application thereof | |
| JP2010125509A (en) | Flux-cored wire for submerged arc welding of low-temperature steel, and welding method using the same | |
| CN112658532B (en) | Coating of austenitic stainless steel welding rod, preparation method and application | |
| CN110253173A (en) | A kind of austenitic stainless steel self-shielded arc welding increasing material manufacturing flux cored wire | |
| CN110480207B (en) | Flux-cored wire containing composite rare earth elements and suitable for welding 1000 MPa-grade ultrahigh-strength steel | |
| CN110560681B (en) | Metal type powder core wire material, preparation method and application | |
| CN106078004A (en) | A kind of low temperature spherical tank ultralow-hydrogen low high-tenacity welding electrodes | |
| CN109454357B (en) | Nickel-based welding rod and preparation method thereof | |
| CN114986020A (en) | Flux-cored wire for welding ocean wind power tower | |
| CN113458656B (en) | A2.25% Cr-1% Mo-V steel electrode for hydrogenation reactor and its preparation method | |
| CN110253172A (en) | A kind of high-strength steel Ar-CO2Metal powder core solder wire used for gas shield welding | |
| JP2001219292A (en) | Welding material, gas metal arc welding method and welded structure | |
| CN105345315A (en) | High-Ni-content self-protection flux-cored wire for welding high-steel-grade pipeline | |
| CN115625450B (en) | High manganese type austenitic welding rod for welding Fe-Mn-Al low temperature steel and preparation thereof | |
| JP5340014B2 (en) | Submerged arc welding method for low temperature steel | |
| CN110385546A (en) | A kind of the X80 pipe line steel submerged-arc welding flux-cored wire and preparation method of good low temperature performance | |
| CN110900033B (en) | Gas shielded mineral powder type 314 heat-resistant stainless steel flux-cored wire | |
| CN104928597B (en) | Low-nickel-chromium stainless steel as well as production method and application thereof | |
| CN113579564A (en) | Surfacing flux-cored wire, preparation process and welding method | |
| CN115213581A (en) | High-toughness welding rod for X80 grade pipeline steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |