CN108927610B - Special welding rod for nuclear-grade heterogeneous steel pipelines and preparation method thereof - Google Patents
Special welding rod for nuclear-grade heterogeneous steel pipelines and preparation method thereof Download PDFInfo
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- CN108927610B CN108927610B CN201811036101.9A CN201811036101A CN108927610B CN 108927610 B CN108927610 B CN 108927610B CN 201811036101 A CN201811036101 A CN 201811036101A CN 108927610 B CN108927610 B CN 108927610B
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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
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
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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
- B23K35/40—Making wire or rods for soldering or welding
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Abstract
The invention discloses a special welding rod for nuclear-grade heterogeneous steel pipelines and a preparation method thereof, wherein the special welding rod consists of a core wire and a coating wrapped on the surface of the core wire, and the coating consists of the following components in percentage by weight: 6-10 parts of marble, 1-3 parts of barium carbonate, 2-5 parts of fluorite, 0.5-5 parts of fluoride, 0.5-5 parts of rutile, 0.4-2 parts of silicate, 0.4-1.5 parts of electrolytic manganese, 0.5-1.5 parts of ferrotitanium, 0.6-1.5 parts of ferrosilicon, 2-4 parts of iron powder, 2.5-4.5 parts of ferrochrome, 0-3 parts of nickel powder, 0-1.5 parts of ferromolybdenum, 1-3 parts of ferroniobium and 0.2-0.5 part of soda. Compared with the prior art, the invention has the advantages of stable electric arc, small splashing, good slag fluidity, good slag removal, beautiful weld forming, small magnetic blow and good all-position operability during welding.
Description
Technical Field
The invention relates to the technical field of welding materials, in particular to a special welding rod for nuclear-grade heterogeneous steel pipelines, a preparation method and a welding method.
Background
The global energy is very short, and the environmental pollution is serious. The adoption of clean energy, green energy and renewable energy is called for, the reduction of harmful emissions becomes a main way for reducing environmental pollution, and in order to respond to energy conservation, environmental protection and emission reduction, countries in the world are rapidly developing nuclear power energy, and China is also rapidly developing nuclear power, and the development trend of nuclear power in China is to develop a pressurized water reactor, a fast neutron reactor in the middle period and a fusion reactor in the long period at present. Specifically, uranium resources adopt a uranium-plutonium circulation technical route, so nuclear power is a green energy source and a renewable energy source, the running cost is low, and the utilization rate of resources and the comprehensive benefits of the economy and the society are improved.
The nuclear power projects built or established in China include Fuqing, Taishan mountain, Fangjiashan, Qinshan, Ling and Macao, City-protective harbor, Hongding river and the like. China develops a large-scale advanced pressurized water reactor and high-temperature gas cooled reactor nuclear power technology with independent intellectual property rights. The Hualong I nuclear power technology demonstration project is also put into construction. The Chinese experiment fast reactor realizes the stable operation of full power for 72 hours, which marks that the key technology of the fast reactor is mastered. These items all put higher demands on the specifications of the welding materials.
The nuclear-grade heterogeneous steel pipes and homogeneous steel materials 06Cr17Ni12Mo2Ti and 06Cr17Ni12Mo2Nb have not found suitable welding rods.
CN106346167B discloses an electrode for welding martensite heat-resistant steel, which has good welding performance, but is only suitable for welding martensite heat-resistant steel, and is used for welding nuclear-grade heterogeneous steel pipes and homogeneous steel materials 06Cr17Ni12Mo2Ti and 06Cr17Ni12Mo2Nb, and the welding process and welding quality are poor, and the electrode is not suitable for welding the steel.
CN105689921A (a flux-cored wire with excellent acid resistance) has the same drawbacks as CN104325232A (a hardfacing flux-cored wire).
Disclosure of Invention
The invention aims to provide a special welding rod for nuclear-grade heterogeneous steel pipelines and a preparation method thereof.
The technical scheme is as follows: a special welding rod for nuclear-grade heterogeneous steel pipelines and a preparation method thereof are disclosed, which are composed of a core wire and a coating wrapped on the surface of the core wire, wherein the coating comprises the following components in percentage by weight: 6-10 parts of marble, 1-3 parts of barium carbonate, 2-5 parts of fluorite, 0.5-5 parts of fluoride, 0.5-5 parts of rutile, 0.4-2 parts of silicate, 0.4-1.5 parts of electrolytic manganese, 0.5-1.5 parts of ferrotitanium, 0.6-1.5 parts of ferrosilicon, 2-4 parts of iron powder, 2.5-4.5 parts of ferrochrome, 0-3 parts of nickel powder, 0-1.5 parts of ferromolybdenum, 1-3 parts of ferroniobium and 0.2-0.5 part of soda; the nuclear-grade heterogeneous steel pipes are nuclear-grade heterogeneous steel pipes and homogeneous steel materials 06Cr17Ni12Mo2Ti and 06Cr17Ni12Mo2 Nb.
Preferably, the core wire is an iron-chromium-nickel-molybdenum-manganese alloy core wire.
Preferably, the core wire comprises the following components: less than or equal to 0.060 wt% of C, 1.00-2.50 wt% of Mn1.00-2.50 wt% of Si, less than or equal to 0.030 wt% of P, less than or equal to 0.020 wt% of S, 18.0-20.0 wt% of Cr18, 11.0-14.0 wt% of Ni11, 2.0-3.0 wt% of Mo2, less than or equal to 0.40 wt% of Cu, less than or equal to 0.080 wt% of N, and the balance of Fe and essential impurities.
Preferably, the core wire comprises the following components: 0.014 of C, 1.95 of Mn, 0.22 of Si, 18.80 of Cr, 11.90 of Ni, 2.40 of Mo, 0.042 of Cu, 0.0052 of S and 0.014 of P, and the balance of Fe and indispensable impurities.
Preferably, CaCO in the marble3The content is more than or equal to 96 percent, and BaCO in barium carbonate3Not less than 98.50%, CaF in fluorite2The content is more than or equal to 96 percent, F is more than or equal to 53 percent in fluoride, Na is less than or equal to 32 percent, and TiO is in rutile2Not less than 92 percent of SiO in silicate2≥45％、Al2O3Not less than 25 percent, Mn in electrolytic manganese not less than 99.5 percent, Ti 25-35 percent in ferrotitanium, Si 42-47 percent in ferrosilicon, Fe not less than 97 percent in iron powder, Cr 65-70 percent in ferrochromium, Ni not less than 99.5 percent in nickel powder, Mo 55-60 percent in ferromolybdenum, Nb 50-55 percent in ferroniobium, and NaCl not more than 0.7 percent in soda.
Preferably, the marble is 6.0 parts by weight, the barium carbonate is 3.0 parts by weight, the fluorite is 4.5 parts by weight, the fluoride is 2.0 parts by weight, the rutile is 5.0 parts by weight, the silicate is 0.8 parts by weight, the electrolytic manganese is 1.0 part by weight, the ferrotitanium is 0.5 part by weight, the ferrosilicon is 1.0 part by weight, the iron powder is 4.0 parts by weight, the ferrochrome is 4.0 parts by weight, the nickel powder is 2.0 parts by weight, the ferromolybdenum is 1.0 part by weight, the ferroniobium is 1.5 parts by weight and the soda is 0.4 part by weight.
Preferably, the marble comprises 8.0 parts by weight of marble, 2.0 parts by weight of barium carbonate, 3.5 parts by weight of fluorite, 3.5 parts by weight of fluoride, 2.5 parts by weight of rutile, 1.0 part by weight of silicate, 1.2 parts by weight of electrolytic manganese, 1.0 part by weight of ferrotitanium, 1.5 parts by weight of ferrosilicon, 3.0 parts by weight of iron powder, 3.0 parts by weight of ferrochrome, 3.0 parts by weight of nickel powder, 1.5 parts by weight of ferromolybdenum, 2.0 parts by weight of ferroniobium and 0.2 parts by weight of soda ash.
Preferably, the marble is 10.0 parts by weight, barium carbonate is 1.0 part by weight, fluorite is 2.0 parts by weight, fluoride is 5.0 parts by weight, rutile is 0.5 parts by weight, silicate is 1.6 parts by weight, electrolytic manganese is 1.5 parts by weight, ferrotitanium is 1.5 parts by weight, ferrosilicon is 1.0 part by weight, iron powder is 2.0 parts by weight, ferrochrome is 2.5 parts by weight, nickel powder is 1.0 part by weight, ferromolybdenum is 1.0 part by weight, ferroniobium is 2.2 parts by weight, and soda ash is 0.5 part by weight.
The invention also aims to provide a preparation method of the special welding rod for the nuclear-grade heterogeneous steel pipelines.
The technical scheme is as follows: a preparation method of a special welding rod for nuclear-grade heterogeneous steel pipelines comprises the following steps:
firstly, uniformly mixing the powder of the coating;
secondly, adding 20-30% of 38-degree Be-39-degree Be potassium-sodium water glass, uniformly mixing, then sending the mixture into a layering machine to wrap the mixture on a core wire, baking the core wire for 4 hours at 50-160 ℃, and preserving heat for 1.5 hours at 300-380 ℃ to obtain the welding rod.
The invention also aims to provide a method for welding nuclear-grade heterogeneous steel pipelines.
The technical scheme is as follows: the welding method adopts the special welding rod to weld the nuclear-grade heterogeneous steel pipelines.
The invention principle and the beneficial effects are as follows:
the austenitic stainless steel alkaline welding rod has excellent welding line mechanical property and can ensure safe and reliable operation.
The welding rod is suitable for welding nuclear-grade heterogeneous steel pipes and homogeneous steel products 06Cr17Ni12Mo2Ti and 06Cr17Ni12Mo2Nb, the chemical components, ray inspection, tensile, impact, crack resistance tests and the like of deposited metal meet the special requirements of welding materials for dissimilar steel and homogeneous steel joints, the deposited metal has excellent mechanical properties such as room-temperature tensile strength (Rm), yield strength (Rp0.2), elongation after fracture (A), room-temperature impact power (KV) and the like in a welding state, particularly the room-temperature impact absorption energy of the deposited metal in the welding state reaches about 100J, and the room-temperature impact absorption energy of the deposited metal in the welding state still reaches about 80J after 680 ℃ x 8h heat treatment. And during welding, the electric arc is stable, the splashing is small, the slag fluidity is good, the slag detachability is good, the weld joint is attractive in forming, the magnetic blow is small, and the all-position operability is good.
Definition and interpretation
Unless otherwise specified, the symbols are mass%.
Unless otherwise specified, all the articles used in the present invention are commercially available products.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
Taking 100Kg of iron-chromium-nickel-molybdenum-manganese alloy of a welding core, wherein the welding core comprises the following components in percentage by weight: c: 0.014, Mn: 1.95, Si: 0.22, Cr: 18.80, Ni: 11.90, Mo: 2.40, Cu: 0.042, S: 0.0052, P: 0.014, the balance being Fe and indispensable impurities.
Taking the medicinal coating, wherein the medicinal coating comprises the following components in parts by weight: containing CaCO36.0Kg of 98.20% marble; containing BaCO33.0Kg of 98.70 percent barium carbonate; containing CaF297.30 percent fluorite 4.5 Kg; 2.0Kg of fluoride containing 53.7% of F and 29.1% of NaF; containing TiO25.0Kg of 92.3 percent rutile; containing SiO246.1％、 Al2O326.5 percent of silicate 0.8 Kg; 1.0Kg of electrolytic manganese containing Mn99.5 percent; 0.5Kg of ferrotitanium containing 31.1 percent of TiFe; 1.0Kg of ferrosilicon containing Si45.6 percent; 4.0Kg of iron powder containing Fe98.5 percent; 4.0Kg of ferrochrome containing 66.5 percent of CrCr; 2.0Kg of nickel powder containing 99.7 percent of Nile; 1.0Kg of ferromolybdenum containing Mo56.5 percent; 1.5Kg of ferrocolumbium containing Nb53.2 percent; 0.4Kg of soda ash containing 0.35% of NaCl0.
The powder is stirred and mixed evenly, then potassium sodium silicate with the concentration of 20-30 percent and the concentration of 38 degrees Be 'to 39 degrees Be' is added and mixed evenly, then the mixture is sent into a bead machine to Be wrapped on a core wire, and then the core wire is baked for 4 hours at the temperature of 50-160 ℃ and is insulated for 1.5 hours at the temperature of 300-380 ℃ to obtain the austenitic stainless steel alkaline welding rod 1 matched with 06Cr17Ni12Mo2Ti and 06Cr17Ni12Mo2Nb which are used for nuclear-grade heterogeneous steel pipelines and homogeneous steel products.
The obtained basic austenitic stainless steel welding rod 1 matched with the nuclear-grade heterogeneous steel pipelines and the homogeneous steel products 06Cr17Ni12Mo2Ti and 06Cr17Ni12Mo2Nb is subjected to a welding experiment, and has the advantages of stable electric arc, small splashing, good slag fluidity, good slag removal, attractive weld forming, small magnetic blow and good all-position operability. The deposited metal components are as follows: c: 0.030%, Mn: 1.66%, Si: 0.45%, Cr: 18.97%, Ni: 11.63%, Mo: 2.39%, Cu: 0.040%, Nb + Ta: 0.55%, S: 0.0080%, P: 0.014%, the balance being iron and unavoidable impurities.
The mechanical properties of the welded deposited metal at room temperature are as follows: tensile strength Rm 602MPa and yield strength Rp0.2461Mpa, 36.0% elongation a, and 115J, average impact kv (room temperature); the deposited metal is subjected to heat treatment at 680 ℃ for 8h, and then the average value of impact kv (room temperature) is 88J.
Example 2
The present example is the same as example 1 except that the weight of each component in the coating is different.
The weight of each component in the coating in the embodiment is as follows: containing CaCO38.0Kg of 98.20% marble; containing BaCO32.0Kg of 98.70 percent barium carbonate; containing CaF297.30% fluorite 3.5 Kg; 3.5Kg of fluoride containing 53.7 percent of F and 29.1 percent of NaF; containing TiO22.5Kg of 92.3 percent rutile; containing SiO246.1％、 Al2O326.5 percent of silicate 1.0 Kg; 1.2Kg of electrolytic manganese containing 99.5 percent of Mn99; 1.0Kg of ferrotitanium containing 31.1 percent of TiFe; 1.5Kg of ferrosilicon containing Si45.6 percent; 3.0Kg of iron powder containing Fe98.5 percent; 3.0Kg of ferrochrome containing 66.5 percent of CrCr; 3.0Kg of nickel powder containing 99.7 percent of Nile; 1.5Kg of ferromolybdenum containing Mo56.5 percent; 2.0Kg of ferrocolumbium containing Nb53.2 percent; 0.2Kg of soda ash containing 0.35% of NaCl0.
The obtained austenitic stainless steel alkaline welding rod 2 matched with 06Cr17Ni12Mo2Ti and 06Cr17Ni12Mo2Nb for nuclear-grade heterogeneous steel pipelines and homogeneous steel materials is subjected to welding experiments, and deposited metal components of the welding rod are as follows: c: 0.032%, Mn: 1.81%, Si: 0.47%, Cr: 18.81%, Ni: 11.95%, Mo: 2.68%, Cu: 0.042%, Nb + Ta: 0.67%, S: 0.0078%, P: 0.013%, the balance iron and inevitable impurities.
The mechanical properties of the welded deposited metal at room temperature are as follows: tensile strength Rm 615Mpa, yield strength Rp0.2470Mpa, elongation a 38.0%, impact kv (room temperature) average 113J; the deposited metal is subjected to heat treatment at 680 ℃ for 8h, and then the average value of impact kv (room temperature) is 81J.
Example 3
The present example is the same as example 1 except that the weight of each component in the coating is different.
The weight of each component in the coating in the embodiment is as follows: containing CaCO310.0Kg of 98.20% marble; containing BaCO31.0Kg of 98.70 percent barium carbonate; containing CaF297.30 percent fluorite 2.0 Kg; fluoride containing 53.7 percent of F and 29.1 percent of Na29.0 Kg; containing TiO292.3 percent rutile 0.5 Kg; containing SiO246.1％、 Al2O326.5 percent of silicate 1.6 Kg; 1.5Kg of electrolytic manganese containing 99.5% of Mn99; 1.5Kg of ferrotitanium containing 31.1 percent of TiFe; 1.0Kg of ferrosilicon containing Si45.6 percent; 2.0Kg of iron powder containing Fe98.5 percent; 2.5Kg of ferrochrome containing 66.5 percent of CrCr; 1.0Kg of nickel powder containing 99.7 percent of Nile; 1.0Kg of ferromolybdenum containing Mo56.5 percent; 2.2Kg of ferrocolumbium containing Nb53.2 percent; 0.5Kg of soda ash containing 0.35% of NaCl0.
The obtained austenitic stainless steel alkaline welding rod 3 matched with 06Cr17Ni12Mo2Ti and 06Cr17Ni12Mo2Nb for nuclear-grade heterogeneous steel pipelines and homogeneous steel materials is subjected to welding experiments, and deposited metal components of the electrode are as follows: c: 0.034%, Mn: 1.86%, Si: 0.46%, Cr: 18.65%, Ni: 11.45%, Mo: 2.35%, Cu: 0.041%, Nb + Ta: 0.69%, S: 0.0077%, P: 0.014%, the balance being iron and unavoidable impurities.
The mechanical properties of the welded deposited metal at room temperature are as follows: tensile strength Rm 598Mpa, yield strength Rp0.2453Mpa, 39.0% elongation a, and 116J, which is the average value of impact kv (room temperature); the deposited metal is subjected to heat treatment at 680 ℃ for 8h, and the average impact kv (room temperature) is 85J.
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 all equivalent variations and modifications made in the spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. A kind of 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2Nb specialized welding rod, by the core wire and wrap up in the coating composition of the surface of core wire, characterized by that the coating composition and content are: 6-10 parts of marble, 1-3 parts of barium carbonate, 2-5 parts of fluorite, 0.5-5 parts of fluoride, 0.5-5 parts of rutile, 0.4-2 parts of silicate, 0.4-1.5 parts of electrolytic manganese, 0.5-1.5 parts of ferrotitanium, 0.6-1.5 parts of ferrosilicon, 2-4 parts of iron powder, 2.5-4.5 parts of ferrochrome, 0-3 parts of nickel powder, 0-1.5 parts of ferromolybdenum, 1-3 parts of ferroniobium and 0.2-0.5 part of soda; the core wire comprises the following components: less than or equal to 0.060 wt% of C, 1.00-2.50 wt% of Mn1.00-2.50 wt% of Si, less than or equal to 0.030 wt% of P, less than or equal to 0.020 wt% of S, 18.0-20.0 wt% of Cr18, 11.0-14.0 wt% of Ni11, 2.0-3.0 wt% of Mo2, less than or equal to 0.40 wt% of Cu, less than or equal to 0.080 wt% of N, and the balance of Fe and essential impurities.
2. The special welding electrode of 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2Nb as claimed in claim 1, wherein the core wire comprises the following components: 0.014 of C, 1.95 of Mn, 0.22 of Si, 18.80 of Cr, 11.90 of Ni, 2.40 of Mo, 0.042 of Cu, 0.0052 of S and 0.014 of P, and the balance of Fe and indispensable impurities.
3. The special welding rod for 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2Nb as claimed in claim 1, wherein: CaCO in the marble3The content is more than or equal to 96 percent, and BaCO in barium carbonate3Not less than 98.50%, CaF in fluorite2The content is more than or equal to 96 percent, F is more than or equal to 53 percent in fluoride, Na is less than or equal to 32 percent, and TiO is in rutile2Not less than 92 percent of SiO in silicate2≥45％、Al2O3Not less than 25 percent, Mn in electrolytic manganese not less than 99.5 percent, Ti 25-35 percent in ferrotitanium, Si 42-47 percent in ferrosilicon, Fe not less than 97 percent in iron powder, Cr 65-70 percent in ferrochromium, Ni not less than 99.5 percent in nickel powder, Mo 55-60 percent in ferromolybdenum, Nb 50-55 percent in ferroniobium, and Na Cl in soda not more than 0.7 percent.
4. The special welding rod for 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2Nb as claimed in any one of claims 1-3, wherein: 6.0 parts of marble, 3.0 parts of barium carbonate, 4.5 parts of fluorite, 2.0 parts of fluoride, 5.0 parts of rutile, 0.8 part of silicate, 1.0 part of electrolytic manganese, 0.5 part of ferrotitanium, 1.0 part of ferrosilicon, 4.0 parts of iron powder, 4.0 parts of ferrochrome, 2.0 parts of nickel powder, 1.0 part of ferromolybdenum, 1.5 parts of ferroniobium and 0.4 part of calcined soda.
5. The special welding rod for 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2Nb as claimed in any one of claims 1-3, wherein: 8.0 parts of marble, 2.0 parts of barium carbonate, 3.5 parts of fluorite, 3.5 parts of fluoride, 2.5 parts of rutile, 1.0 part of silicate, 1.2 parts of electrolytic manganese, 1.0 part of ferrotitanium, 1.5 parts of ferrosilicon, 3.0 parts of iron powder, 3.0 parts of ferrochrome, 3.0 parts of nickel powder, 1.5 parts of ferromolybdenum, 2.0 parts of ferroniobium and 0.2 part of calcined soda.
6. The special welding rod for 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2Nb as claimed in any one of claims 1-3, wherein: 10.0 parts of marble, 1.0 part of barium carbonate, 2.0 parts of fluorite, 5.0 parts of fluoride, 0.5 part of rutile, 1.6 parts of silicate, 1.5 parts of electrolytic manganese, 1.5 parts of ferrotitanium, 1.0 part of ferrosilicon, 2.0 parts of iron powder, 2.5 parts of ferrochrome, 1.0 part of nickel powder, 1.0 part of ferromolybdenum, 2.2 parts of ferroniobium and 0.5 part of calcined soda.
7. The preparation method of the special welding rod for 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2Nb of any one of claims 1 to 6, comprising the following steps:
uniformly mixing the powder of the coating;
secondly, adding 20-30% of 38-degree Be-39-degree Be potassium-sodium water glass, uniformly mixing, then sending the mixture into a layering machine to wrap the mixture on a core wire, baking the core wire for 4 hours at 50-160 ℃, and preserving heat for 1.5 hours at 300-380 ℃ to obtain the welding rod.
8. A welding method of 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2Nb, which adopts the special welding rod of 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2Nb of any one of claims 1-6 to weld 06Cr17Ni12Mo2Ti or 06Cr17Ni12Mo2 Nb.
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| CN114310032A (en) * | 2021-12-08 | 2022-04-12 | 四川大西洋焊接材料股份有限公司 | High-molybdenum low-alloy welding rod for nuclear-grade equipment and preparation method thereof |
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| CN106808113B (en) * | 2017-03-03 | 2019-08-06 | 四川大西洋焊接材料股份有限公司 | The mating welding rod of ultra supercritical material C B2 steel and preparation method thereof suitable for Long-term Service under High Temperature |
| CN107931888B (en) * | 2017-11-27 | 2020-10-20 | 四川大西洋焊接材料股份有限公司 | High-strength steel welding rod for hydroelectric engineering and preparation method thereof |
| CN107971656B (en) * | 2017-11-27 | 2020-07-28 | 四川大西洋焊接材料股份有限公司 | High-strength high-plasticity toughness sand erosion resistant clean martensitic stainless steel alkaline electric welding rod and preparation method thereof |
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Effective date of registration: 20181212 Address after: 610000 No. 1 Danyang Street, Ziliujing District, Zigong City, Sichuan Province Applicant after: Sichuan Atlantic China Welding Consumables, Inc. Applicant after: Dongfang Turbine Co., Ltd., Dongfang Electric Group Address before: 643000 No. 2 Machongkou Street, Daan District, Zigong City, Sichuan Province Applicant before: Sichuan Atlantic China Welding Consumables, Inc. |
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