CN104400246A - Welding electrode for welding -50 DEG C low-temperature pressure container steel - Google Patents
Welding electrode for welding -50 DEG C low-temperature pressure container steel Download PDFInfo
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- CN104400246A CN104400246A CN201410541063.8A CN201410541063A CN104400246A CN 104400246 A CN104400246 A CN 104400246A CN 201410541063 A CN201410541063 A CN 201410541063A CN 104400246 A CN104400246 A CN 104400246A
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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
- B23K35/3601—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 with inorganic compounds as principal constituents
- B23K35/3602—Carbonates, basic oxides or hydroxides
-
- 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
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0272—Rods, electrodes, wires with more than one layer of coating or sheathing material
-
- 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
- B23K35/22—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
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
Abstract
The invention discloses a welding electrode for welding -50 DEG C low-temperature pressure container steel. A core wire of the welding electrode is H08E of low S and P; a cover is prepared by the following components in parts by weight: 32-40 parts of marbles, 15-23 parts of fluorite, 4-8 parts of rutile, 5-7 parts of silica powder, 11-15 parts of iron powder, 5-9 parts of silicon iron, 3-6 parts of ferromanganese, 1-3 parts of ferrotitanium, 1.5-2.5 parts of metal nickel, 1-3 parts of phlogopite, 1-2 parts of sodium carbonate, and 0.5-1.0 part of graphite; all the components of the cover are evenly mixed, and 3.2 M pure sodium water glass of 24 weight% by the total weight of the components is added for mixing to prepare the cover; the rest production process of the welding electrode is performed by a conventional technology; the heat treatment is performed after the welding; and the temperature of 620 DEG C is keep for 1 hour, so that the mechanical performance is stable, the tensile strength reaches 560-620 Mpa at room temperature, and the -50 DEG C V-shaped gap impact power reaches above 110 J to satisfy the welding of the -50 DEG C low-temperature pressure container steel.
Description
Technical field
The invention belongs to technical field of welding materials, especially a kind of welding rod for-50 DEG C of low-temperature pressure vessel steel welding.
Background technology
Along with China's oil chemical industry is fast-developing, all kinds of for storing liquefied petroleum, the large-scale low-temperature pressure vessels such as natural gas, ethene, propylene have had very large demand.
15MnNiNbDR steel plate has low-welding crack-sensitive and intensity high, is mainly used on ethene low-temperature pressure container, and design serviceability temperature is-50 DEG C.Require also higher because service condition is harsh to its welding condition, mainly be reflected on the various compositions of welding rod, and the welding rod used at present to there is all-position welding manufacturability poor, deposited metal low-temperature flexibility after hidden lino removal is lower, unstable properties, easily occur the problems such as low value, can not meet the designing requirement of-50 DEG C of low-temperature pressure containers.
Summary of the invention
For solving the problem, the invention provides a kind of welding rod for-50 DEG C of low-temperature pressure vessel steel welding, this welding rod a kind ofly has good all-position welding manufacturability and stable performance for the welding rod of-50 DEG C of low-temperature pressure containers welding, arc stability during welding, clear, the de-slag in molten bath are easy, and deposited metal composition is reasonable in design and have good low-temperature toughness.
For achieving the above object, the present invention adopts following technical scheme:
For a welding rod for-50 DEG C of low-temperature pressure vessel steel welding, the core wire of this welding rod adopts the H08E of low S, P; In the coating of this welding rod except the calcite and fluorite containing gas making and slag making, rutile, silicon powder, contain ferromanganese, ferrosilicon, ferrotianium, graphite, metallic nickel in its deoxidation and alloy transition element, it improves in extrusion element containing phlogopite and soda ash; Described coating under the cooperation of binding agent and routinely fabrication techniques goes out this welding rod, and low-temperature pressure vessel steel adopts 15MnNiNbDR, and feature of the present invention is as follows:
The each component of described coating proportioning is by weight: 32 ~ 40 parts of marbles, 15 ~ 23 parts of fluorites, 4 ~ 8 parts of rutile, 5 ~ 7 parts of silicon powders, 11 ~ 15 parts of iron powders, 5 ~ 9 parts of ferrosilicon, 3 ~ 6 parts of ferromanganese, 1 ~ 3 part of ferrotianium, 1.5 ~ 2.5 parts of metallic nickels, 1 ~ 3 part of phlogopite, 1 ~ 2 part of soda ash, 0.5 ~ 1.0 part of graphite;
First by said ratio by each for described coating component mixing and stirring, then carry out mix and blend by the pure sodium silicate of 3.2M that the gross weight of said ratio adds 24% weight portion, require that the density domination of the pure sodium silicate of 3.2M is at 1.40 ~ 1.45g/mm
3, all the other manufacturing process technology routinely;
The chemical composition wt% of above-mentioned H08E requires: C≤0.010, Mn:0.35 ~ 0.60, Si≤0.030, S≤0.005, P≤0.005;
Above-mentioned marmorean chemical composition wt% requires: CaCO
3>=98.0, S≤0.010, P≤0.010; Above-mentioned marmorean granularity requirements is: 60 orders;
The chemical composition wt% of above-mentioned fluorite requires: CaF
2>=95.0, SiO
2≤ 1.00, S≤0.010, P≤0.010, above-mentioned fluorite granularity requirements be: 60 orders;
The chemical composition wt% of above-mentioned rutile requires: TiO
2>=95.0, S≤0.02, P≤0.02, the granularity requirements of above-mentioned rutile is: 60 orders;
The chemical composition wt% of above-mentioned silicon powder requires: SiO
2>=97.0, S≤0.010, P≤0.010, the granularity requirements of above-mentioned silicon powder is: 100 orders;
The chemical composition wt% of above-mentioned iron powder requires: Fe >=98.0, S≤0.025, P≤0.020, C≤0.03, and the granularity requirements of above-mentioned iron powder is: 60 orders;
The chemical composition wt% of above-mentioned ferrosilicon requires: Si:43.0 ~ 47.0, C≤0.020, S≤0.010, P≤0.010, above-mentioned ferrosilicon granularity requirements be: 40 orders;
The chemical composition wt% of above-mentioned ferromanganese requires: C≤0.40, Mn:80.0 ~ 87.0, S≤0.020, P≤0.150, and the granularity requirements of above-mentioned ferromanganese is: 40 orders;
The chemical composition wt% of above-mentioned ferrotianium requires: Ti:25 ~ 35, C≤0.1, S≤0.03, P≤0.05, Al≤8.0, Si≤4.5, and the granularity requirements of above-mentioned ferrotianium is: 40 orders;
The chemical composition wt% of above-mentioned metallic nickel requires: Ni+Co >=99.5, C≤0.05, S≤0.005, P
≤ 0.005, the granularity requirements of above-mentioned metallic nickel is: 80 orders;
The chemical composition wt% of above-mentioned phlogopite requires: SiO
2: 45 ~ 55, Al
2o
3: 25 ~ 35, K
2o+Na
2o>=7.0, S≤0.010, P≤0.010, the granularity requirements of above-mentioned phlogopite is: 14 orders;
The chemical composition wt% of above-mentioned soda ash requires: Na
2cO
3>=98.0, the granularity requirements of above-mentioned soda ash is: 60 orders;
The chemical composition wt% of above-mentioned graphite requires: C >=95, S≤0.10, P≤0.010, and the granularity requirements of above-mentioned graphite is: 200 orders;
The chemical composition wt% of the pure sodium silicate of above-mentioned 3.2M requires: Na
2o>=8.2, SiO
2>=26.0, S≤0.010, P≤0.010, the modulus requirement of the pure sodium silicate of above-mentioned 3.2M is: 3.2, and above-mentioned 3.2M is pure
The Baume degrees of sodium silicate requires: 43 °.
Owing to adopting technical scheme described above, the present invention produces following good effect:
1, deposited metal is after 620 ± 10 DEG C × 1h heat treatment, stable mechanical property, tensile strength during room temperature reaches 560 ~ 620Mpa, and reach more than 110J at the v-notch ballistic work of-50 DEG C, good tough performance meets the welding of-50 DEG C of steel for low-temperature pressure container.
2, deposited metal diffusible hydrogen can reach ultralow-hydrogen low requirement, is less than 4.0ml/100g through gas chromatography determination deposited metal diffusible hydrogen.
3, all-position welding manufacturability is good, arc stability, clear, the de-slag in molten bath are easy, and appearance of weld is attractive in appearance.
4, processing performance is excellent, and welding rod smooth surface, bias are stable, yield rate is high.
Detailed description of the invention
The present invention is a kind of welding rod for-50 DEG C of low-temperature pressure vessel steel welding, this welding rod comprises core wire, coating and binding agent, and technology makes routinely, the proportioning of described coating and described core wire are see shown in technical scheme, and it is used that described binding agent is that routine prepares welding rod.
Following table is described coating three Example formulations by weight.
According to the formula of above-mentioned three embodiments by each component mixing and stirring, the pure sodium silicate of 3.2M adding 24% weight portion by the gross weight of said ratio again carries out mix and blend, if the total number of said ratio is 100 parts, then add the pure sodium silicate of 3.2M of 24 parts, require that the density domination of the pure sodium silicate of 3.2M is at 1.40 ~ 1.45g/mm
3, described coating can be made to have plasticity needed for good extrusion, all the other manufacturing process technology routinely.
Welding rod of the present invention is mainly used in the low-temperature pressure container that 15MnNiNbDR makes, and the low-temperature pressure container close with 15MnNiNbDR performance is same is suitable for the present invention, re-uses after welding rod of the present invention being cured 2 hours through 350 ~ 380 DEG C before welding.Deposited metal composition analysis, deposited metal Mechanics Performance Testing, deposited metal diffusible hydrogen content mensuration is carried out according to GB GB/T 5118-2012 standard, for Φ 4.0 welding rod, welding condition is: source of welding current DC reverse connection, welding current 170 ~ 180A, weldingvoltage 22 ~ 28V, temperature 100 ~ 150 DEG C between road, post weld heat treatment 620 DEG C insulation 1h, its deposited metal composition wt% testing result reference value sees the following form:
| C | Mn | Si | P | S | Ni | |
| Embodiment 1 | 0.077 | 1.53 | 0.38 | 0.012 | 0.007 | 0.51 |
| Embodiment 2 | 0.085 | 1.36 | 0.41 | 0.013 | 0.006 | 0.63 |
| Embodiment 3 | 0.078 | 1.45 | 0.45 | 0.013 | 0.006 | 0.75 |
Its deposited metal mechanical property sees the following form in the testing result reference value of postwelding 620 DEG C insulation 1h:
The testing result reference value that its gas chromatography detects deposited metal diffusible hydrogen content sees the following form:
In described coating: calcite and fluorite, rutile, silicon powder are as gas making, slag former, and can play a protective role in stage droplet transfer and molten bath solidification stages liquid towards metal, proportioning of the present invention can obtain good all-position welding manufacturability;
Adopt CaO-CaF
2-SiO
2-TiO
2slag system, slag basicity is high, and deposited metal diffusible hydrogen content is low, can also play desulfurized effect;
Ferrosilicon, ferromanganese, ferrotianium, graphite are as deoxidation and alloy transition element, and proportioning of the present invention can make deposited metal obtain suitable oxygen content and suitable intensity, toughness reguirements;
Nickel can improve Low Temperature Toughness of Deposited Metals as alloy transition, reduce the most effective element of ductile-brittle transition temperature.
In the present invention, C has the effect improving deposited metal intensity, has great deterioration effect, so C content totally should control in 0.04 ~ 0.1% scope to low-temperature flexibility simultaneously; Si is harmful element to low-temperature flexibility, but is the indispensable element of proof strength, and plays deoxidation in welding process, and purification deposited metal, increases acicular ferrite quantity, so Si content totally should control 0.2 ~ 0.5%; Mn and Si effect is similar, suitable Mn/Si ratio can refinement deposited metal acicular ferrite and coarse grain zone, fine grained region microscopic structure, improve low-temperature flexibility, so Mn content totally should control 1.0 ~ 1.6%; Ni can promote that acicular ferrite is formed, and is the essential element improving Low Temperature Toughness of Deposited Metals, is reduce the most effective element of ductile-brittle transition temperature, so Ni content totally should control in 0.4 ~ 0.8% scope; S, P are harmful impurity to Toughness of Deposited Metal, should reduce as far as possible.
Welding rod of the present invention has good all-position welding manufacturability, weld metal composition is reasonable, stable mechanical property, diffusible hydrogen content is low, meet GB/T-5118-2012 E5515-G, AWS A5.5 E8015-G and NB/T47018.2-2011 standard, meet the welding of-50 DEG C of low-temperature pressure containers completely.
The embodiment selected in this article in order to open object of the present invention, currently thinks to be suitable for, but it is to be understood that the present invention is intended to comprise all changes belonging to the embodiment in this design and the scope of the invention and improvement.
Claims (1)
1., for a welding rod for-50 DEG C of low-temperature pressure vessel steel welding, the core wire of this welding rod adopts the H08E of low S, P; In the coating of this welding rod except the calcite and fluorite containing gas making and slag making, rutile, silicon powder, contain ferromanganese, ferrosilicon, ferrotianium, graphite, metallic nickel in its deoxidation and alloy transition element, it improves in extrusion element containing phlogopite and soda ash; Described coating under the cooperation of binding agent and routinely fabrication techniques goes out this welding rod, and low-temperature pressure vessel steel adopts 15MnNiNbDR, it is characterized in that:
The each component of described coating proportioning is by weight: 32 ~ 40 parts of marbles, 15 ~ 23 parts of fluorites, 4 ~ 8 parts of rutile, 5 ~ 7 parts of silicon powders, 11 ~ 15 parts of iron powders, 5 ~ 9 parts of ferrosilicon, 3 ~ 6 parts of ferromanganese, 1 ~ 3 part of ferrotianium, 1.5 ~ 2.5 parts of metallic nickels, 1 ~ 3 part of phlogopite, 1 ~ 2 part of soda ash, 0.5 ~ 1.0 part of graphite;
First by said ratio by each for described coating component mixing and stirring, then carry out mix and blend by the pure sodium silicate of 3.2M that the gross weight of said ratio adds 24% weight portion, require that the density domination of the pure sodium silicate of 3.2M is at 1.40 ~ 1.45g/mm
3, all the other manufacturing process technology routinely;
The chemical composition wt% of above-mentioned H08E requires: C≤0.010, Mn:0.35 ~ 0.60, Si≤0.030, S≤0.005, P≤0.005;
Above-mentioned marmorean chemical composition wt% requires: CaCO
3>=98.0, S≤0.010, P≤0.010; Above-mentioned marmorean granularity requirements is: 60 orders;
The chemical composition wt% of above-mentioned fluorite requires: CaF
2>=95.0, SiO
2≤ 1.00, S≤0.010, P≤0.010, above-mentioned fluorite granularity requirements be: 60 orders;
The chemical composition wt% of above-mentioned rutile requires: TiO
2>=95.0, S≤0.02, P≤0.02, the granularity requirements of above-mentioned rutile is: 60 orders;
The chemical composition wt% of above-mentioned silicon powder requires: SiO
2>=97.0, S≤0.010, P≤0.010, the granularity requirements of above-mentioned silicon powder is: 100 orders;
The chemical composition wt% of above-mentioned iron powder requires: Fe >=98.0, S≤0.025, P≤0.020, C≤0.03, and the granularity requirements of above-mentioned iron powder is: 60 orders;
The chemical composition wt% of above-mentioned ferrosilicon requires: Si:43.0 ~ 47.0, C≤0.020, S≤0.010, P≤0.010, above-mentioned ferrosilicon granularity requirements be: 40 orders;
The chemical composition wt% of above-mentioned ferromanganese requires: C≤0.40, Mn:80.0 ~ 87.0, S≤0.020, P≤0.150, and the granularity requirements of above-mentioned ferromanganese is: 40 orders;
The chemical composition wt% of above-mentioned ferrotianium requires: Ti:25 ~ 35, C≤0.1, S≤0.03, P≤0.05, Al≤8.0, Si≤4.5, and the granularity requirements of above-mentioned ferrotianium is: 40 orders;
The chemical composition wt% of above-mentioned metallic nickel requires: Ni+Co >=99.5, C≤0.05, S≤0.005, P
≤ 0.005, the granularity requirements of above-mentioned metallic nickel is: 80 orders;
The chemical composition wt% of above-mentioned phlogopite requires: SiO
2: 45 ~ 55, Al
2o
3: 25 ~ 35, K
2o+Na
2o>=7.0, S≤0.010, P≤0.010, the granularity requirements of above-mentioned phlogopite is: 14 orders;
The chemical composition wt% of above-mentioned soda ash requires: Na
2cO
3>=98.0, the granularity requirements of above-mentioned soda ash is: 60 orders;
The chemical composition wt% of above-mentioned graphite requires: C >=95, S≤0.10, P≤0.010, and the granularity requirements of above-mentioned graphite is: 200 orders;
The chemical composition wt% of the pure sodium silicate of above-mentioned 3.2M requires: Na
2o>=8.2, SiO
2>=26.0, S≤0.010, P≤0.010, the modulus requirement of the pure sodium silicate of above-mentioned 3.2M is: 3.2, and above-mentioned 3.2M is pure
The Baume degrees of sodium silicate requires: 43 °.
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Cited By (8)
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|---|---|---|---|---|
| CN104759782A (en) * | 2015-04-24 | 2015-07-08 | 洛阳双瑞特种合金材料有限公司 | Alloy system electrode with low-tempering brittleness |
| CN105986113A (en) * | 2015-06-05 | 2016-10-05 | 上海江南长兴重工有限责任公司 | Postwelding heat treatment technique for low-temperature steel |
| CN106078004A (en) * | 2016-06-23 | 2016-11-09 | 武汉铁锚焊接材料股份有限公司 | A kind of low temperature spherical tank ultralow-hydrogen low high-tenacity welding electrodes |
| CN106238958A (en) * | 2015-06-09 | 2016-12-21 | 株式会社神户制钢所 | Low hydrogen system covered electrode |
| CN106425164A (en) * | 2016-12-15 | 2017-02-22 | 昆山京群焊材科技有限公司 | High-strength steel electrode used for minus 50 DEG C low temperature spherical tank |
| CN106493486A (en) * | 2016-12-15 | 2017-03-15 | 昆山京群焊材科技有限公司 | A kind of low-alloy steel welding rod of low-temperature impact-resistant |
| CN107088719A (en) * | 2017-03-09 | 2017-08-25 | 洛阳双瑞特种合金材料有限公司 | One kind can post weld heat treatment low-alloy steel electrode |
| CN109759744A (en) * | 2019-01-23 | 2019-05-17 | 洛阳双瑞特种合金材料有限公司 | A kind of welding wire medicinal powder can be heat-treated seamless flux-cored wire and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106078004A (en) * | 2016-06-23 | 2016-11-09 | 武汉铁锚焊接材料股份有限公司 | A kind of low temperature spherical tank ultralow-hydrogen low high-tenacity welding electrodes |
| CN106078004B (en) * | 2016-06-23 | 2018-10-02 | 武汉铁锚焊接材料股份有限公司 | A kind of low temperature spherical tank ultralow-hydrogen low high-tenacity welding electrodes |
| CN106425164A (en) * | 2016-12-15 | 2017-02-22 | 昆山京群焊材科技有限公司 | High-strength steel electrode used for minus 50 DEG C low temperature spherical tank |
| CN106493486A (en) * | 2016-12-15 | 2017-03-15 | 昆山京群焊材科技有限公司 | A kind of low-alloy steel welding rod of low-temperature impact-resistant |
| CN107088719A (en) * | 2017-03-09 | 2017-08-25 | 洛阳双瑞特种合金材料有限公司 | One kind can post weld heat treatment low-alloy steel electrode |
| CN107088719B (en) * | 2017-03-09 | 2019-04-09 | 洛阳双瑞特种合金材料有限公司 | One kind can post weld heat treatment low-alloy steel electrode |
| CN109759744A (en) * | 2019-01-23 | 2019-05-17 | 洛阳双瑞特种合金材料有限公司 | A kind of welding wire medicinal powder can be heat-treated seamless flux-cored wire and application |
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