CN102922175A - Dedicated submerged-arc welding flux for petroleum pipeline - Google Patents
Dedicated submerged-arc welding flux for petroleum pipeline Download PDFInfo
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- CN102922175A CN102922175A CN2012104798539A CN201210479853A CN102922175A CN 102922175 A CN102922175 A CN 102922175A CN 2012104798539 A CN2012104798539 A CN 2012104798539A CN 201210479853 A CN201210479853 A CN 201210479853A CN 102922175 A CN102922175 A CN 102922175A
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Abstract
The invention discloses dedicated submerged-arc welding flux for a petroleum pipeline, which comprises welding flux and adhesive, wherein the welding flux comprises the following materials by weight percent: 15 to 20 percent of fluoride compound, 24 to 32 percent of aluminum sesquioxide compound, 12 to 26 percent of basic oxide compound, 0.1 to 1 percent of silicon dioxide, 0.1 to 1 percent of barium titanate, 26 to 33 percent of manganese mineral powder, 5 to 10 percent of ferromanganese, 0.1 to 4 percent of metallic nickel, 5 to 12 percent of ferrosilicon and 0.1 to 5 percent of ferroboron. Through addition of various trace alloying elements, the low-temperature impact ductility of the dedicated submerged-arc welding flux can be improved remarkably; as various fluorides capable of reducing the contents of hazardous elements such as sulfur, phosphorus and hydrogen are added, the comprehensive performance of a weld joint is improved; and as the contents of manganese and silicone are higher, the requirements on welding with larger parameters can be met, manganese and silicone which are lost through burning during a welding process can be effectively supplemented, and the mechanical property of the weld joint is guaranteed.
Description
Technical field
The invention belongs to technical field of welding materials, especially relate to the special-purpose submerged arc welding flux of a kind of petroleum pipeline.
Background technology
During 12, pipe-line construction goes into operation in a large number, PetroChina Company Limited. will build 20,000 kilometers petroleum pipelines, China Petrochemical Industry will build 1.4 ten thousand kilometers pipelines, and CNOOC will build 8000 kilometers pipelines, welded high-strength level pipeline pipeline steel, in the urgent need to a large amount of special welding materials, to the also more and more higher requirement of corresponding proposition of welding material, not only the integrated performance index requirement is higher, and will satisfy high-speed and high-efficiency welding demand.At present, abroad only have the minority wlding factories such as Lincoln, refreshing steel to develop the welding material of this type of performance, but price is extremely expensive, and does not domesticly still have at present this type of matured product.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of can be efficiently and high-speed welding, take off slag easily, the welding bead moulding is attractive in appearance, postwelding allowance is little, the special-purpose submerged arc welding flux of the guaranteed petroleum pipeline of welding quality, is particularly useful for the welding of long distance pipeline.
Technical scheme of the present invention is the special-purpose submerged arc welding flux of a kind of petroleum pipeline, comprises solder flux medicinal powder and adhesive, and solder flux medicinal powder comprises the component of following percentage by weight:
The percentage by weight sum of above each component is 100%, MnO content 〉=62% in the manganese ore powder wherein, Si content 〉=72% in the Antaciron, B content 〉=15% in the ferro-boron.
Preferably, described fluoride mixture is the mixture of two kinds of fluorides, and described alundum (Al2O3) mixture is the mixture of three kinds of different phase structure alundum (Al2O3)s, and described basic anhydride mixture is the mixture of two kinds of basic anhydride.
Preferably, described fluoride is comprised of calcirm-fluoride and barium fluoride.
Preferably, described alchlor is comprised of bauxite, calcining alpha-type aluminum oxide, white fused alumina.
Preferably, described basic anhydride are magnesia and calcium oxide.
Preferably, described adhesive is high mould potassium-sodium water glass, and modulus is that 3.0-3.1, potassium sodium mass ratio are 2: 1, and the part by weight of high mould potassium-sodium water glass and solder flux medicinal powder is 25%.
Formulation analysis of the present invention:
The alundum (Al2O3) of three kinds of different phase structures is chief component compositions of solder flux, preferred bauxite, calcining alpha-type aluminum oxide, white fused alumina, the alundum (Al2O3) of different shape has different fusing points and setting temperature, by content and the proportioning of regulating three kinds of alundum (Al2O3)s, can control viscosity, fusing point, the setting temperature of slag.In the present invention, its mass percent that accounts for solder flux is 24-32%.
The interpolation of two kinds of fluorides is key technologies of the present invention, two kinds of fluoride preferred fluorinated calcium and barium fluoride, calcirm-fluoride can be combined into hydrogen fluoride gas with hydrogen in the weld seam and overflow, be conducive to reduce the dividing potential drop of hydrogen in the arc atmosphere, thereby play the dehydrogenation effect, reduce the content of harmful element hydrogen in the weld seam, reduced the generation of hydrogen induced cracking.Barium fluoride has strong shoddye effect, can increase the flowability in molten bath, guarantees that weld seam is shaped attractive in appearance under large parameter, and its content needs suitably, and shoddye scarce capacity then easily causes arc stability to descend too much very little.In the present invention, two kinds of fluorides mass percent of accounting for solder flux is 15-20%.
The manganese ore powder belongs to innovative point in the present invention, and its Main Function is to regulate viscosity coefficient of dross, interpolation alloying element and desulfurization.The main matter of manganese ore powder is manganese oxide, can with Antaciron generation reduction reaction, to weld metal transition manganese element.Because the pipeline solder flux is in the situation that welding parameter is larger uses, the scaling loss of manganese element is comparatively serious, and manganese oxide both can suppress the oxidation reaction of manganese element and must carry out, and played a protective role, and simultaneously and the harmful element reaction of Salmon-Saxl, is combined into sulfide and enters slag.In the present invention, to account for the mass percent of solder flux be 26-33% to the manganese ore powder.
Two kinds of basic anhydride are magnesia and calcium oxide, effect is to guarantee welding arc stablility, around electric arc, cause a kind of atmosphere of reduction, prevent airborne steam, carbon dioxide, the pernicious gases such as carbon monoxide enter deposited metal, the welding slag that generates covers the weld metal surface equably, slowed down the cooling velocity of weld metal, and obtain good appearance of weld, guarantee that slag has suitable fusing point, viscosity, density, coating forms slag under the high temperature action of electric arc, a series of chemical metallurgy reactions occur, and remove oxide and sulphur, the objectionable impurities such as phosphorus.In the present invention, its mass percent that accounts for solder flux is 12-26%.
Silica increases the high temperature viscosity of slag mainly as slag former, regulates angle of wetting, improves appearance of weld.In the present invention, its mass percent that accounts for solder flux is 0.1-1%.
Barium titanate belongs to key technology in the present invention, and the steel for pipe material adds titanium elements and carries out crystal grain thinning for guaranteeing its combination property, adds a small amount of barium titanate in solder flux, can suppress the oxidation of titanium elements when welding, guarantees the content of titanium elements in the weld seam.In the present invention, its mass percent that accounts for solder flux is 0.1-1%.
Manganeisen is good deoxidier and desulfurizing agent, can significantly improve the intensity of weld seam, improves the toughness of weld seam, but content is unsuitable too high, otherwise easily produces weld seam centre burst.In the present invention, its mass percent that accounts for solder flux is 5-10%.
Metallic nickel is an innovative technology of the present invention, because high tenacity under the lower temperature is satisfied in the petroleum pipeline requirement, and a small amount of metallic nickel can play the obvious effect that improves welding seam toughness, can strengthen intergranular structure.In the present invention, its mass percent that accounts for solder flux is 0.1-4%.
Antaciron is very crucial in the present invention, carry out combined deoxidation with manganese metal, react the generation manganese metal with the manganese ore powder, replenish the manganese element in the weld seam, simultaneously can add element silicon in weld seam, the manganese element silicon can guarantee the intensity of weld seam, but content can not be too high, the too high weld strength that then easily causes is too high, impact toughness decreased.In the present invention, its mass percent that accounts for solder flux is 5-12%.
Ferro-boron is innovative point of the present invention, and a small amount of rare earth element boron is crystal grain thinning further, and metallographic structure forms acicular ferrite, can satisfy pipeline with the requirement of welding material to low-temperature flexibility.In the present invention, its mass percent that accounts for solder flux is 0.1-5%.
Advantage of the present invention and effect: the special-purpose submerged arc welding flux of pipeline of the present invention adds the lot of trace alloying element, by crystal grain thinning, improve the intergranular structure structure, can significantly improve low-temperature impact toughness.Add the content that multiple fluoride, oxide can reduce harmful element sulphur, phosphorus, hydrogen, improve the combination property of weld seam, in addition, manganese silicone content of the present invention is higher, can satisfy the welding under the larger parameter, can effectively replenish the manganese silicon scaling loss amount in the welding process, guarantee the mechanical property of weld seam.
The specific embodiment
Solder flux raw material of the present invention are formulated strict control criterion through the strict control of selecting materials to each raw material.In process of production, carry out omnidistance on-line monitoring, medicinal powder is prepared mixing by a certain percentage, waterglass according in 25% the part by weight adding solder flux medicinal powder, with up-to-date spiral solder flux production equipment, is made solder flux and oven dry with mixed powder.In order to understand the present invention, the invention will be further described below by specific embodiment.
Embodiment one
(1) various raw-material weight percentages such as following table in the solder flux medicinal powder: (%)
| Calcirm-fluoride | Barium fluoride | Bauxite | The calcining alpha-type aluminum oxide | White fused alumina | Magnesia | Calcium oxide |
| 8 | 8 | 7 | 10 | 9 | 8 | 5 |
| Silica | Barium titanate | The manganese ore powder | Manganeisen | Metallic nickel | Antaciron | Ferro-boron |
| 0.8 | 0.2 | 28 | 6 | 2 | 7 | 1 |
MnO content 〉=62% in the manganese ore powder wherein, Si content 〉=72% in the Antaciron, B content 〉=15% in the ferro-boron
(2) adhesive is high mould potassium-sodium water glass, and modulus is that 3.0-3.1, potassium sodium ratio are 2: 1.
(3) make submerged arc welding flux according to mentioned component and detect, according to GB GB/T 12470-2003 standard code, cooperate petroleum pipeline welding wire for submerged-arc welding H08MnMoTiB, carry out deposited metal composition analysis, deposited metal Mechanics Performance Testing.Welding conditions: the source of welding current is dc reverse connection, and weld heat input is between 18-19KJ/cm, road temperature 145-150 ℃.
1. deposited metal composition percentage by weight measured value: (%)
| Chemical element | C | S | Mn | Si | P | Ni | Mo | Ti | B |
| Measured value | 0.045 | 0.003 | 1.65 | 0.71 | 0.016 | 0.75 | 0.35 | 0.014 | 0.0038 |
2. deposited metal mechanical property measured value
Embodiment two
(1) various raw-material weight percentages such as following table in the solder flux medicinal powder: (%)
| Calcirm-fluoride | Barium fluoride | Bauxite | The calcining alpha-type aluminum oxide | White fused alumina | Magnesia | Calcium oxide |
| 7 | 9 | 7 | 9 | 10 | 8 | 5 |
| Silica | Barium titanate | The manganese ore powder | Manganeisen | Metallic nickel | Antaciron | Ferro-boron |
| 0.8 | 0.2 | 28 | 6 | 2 | 7 | 1 |
MnO content 〉=62% in the manganese ore powder wherein, Si content 〉=72% in the Antaciron, B content 〉=15% in the ferro-boron
(2) adhesive is high mould potassium-sodium water glass, and modulus is that 3.0-3.1, potassium sodium ratio are 2: 1.
(3) make submerged arc welding flux according to mentioned component and detect, according to GB GB/T 12470-2003 standard code, cooperate petroleum pipeline welding wire for submerged-arc welding H08MnMoTiB, carry out deposited metal composition analysis, deposited metal Mechanics Performance Testing.Welding conditions: the source of welding current is dc reverse connection, and weld heat input is between 18-19KJ/cm, road temperature 145-150 ℃.
1. deposited metal composition percentage by weight measured value: (%)
| Chemical element | C | S | Mn | Si | P | Ni | Mo | Ti | B |
| Measured value | 0.044 | 0.004 | 1.66 | 0.70 | 0.018 | 0.73 | 0.34 | 0.014 | 0.0037 |
2. deposited metal mechanical property measured value
Embodiment three
(1) various raw-material weight percentages such as following table in the solder flux medicinal powder: (%)
| Calcirm-fluoride | Barium fluoride | Bauxite | The calcining alpha-type aluminum oxide | White fused alumina | Magnesia | Calcium oxide |
| 8 | 8 | 7 | 10 | 9 | 6 | 7 |
| Silica | Barium titanate | The manganese ore powder | Manganeisen | Metallic nickel | Antaciron | Ferro-boron |
| 1 | 0.2 | 28 | 6 | 2 | 7 | 0.8 |
MnO content 〉=62% in the manganese ore powder wherein, Si content 〉=72% in the Antaciron, B content 〉=15% in the ferro-boron
(2) adhesive is high mould potassium-sodium water glass, and modulus is that 3.0-3.1, potassium sodium ratio are 2: 1.
(3) make submerged arc welding flux according to mentioned component and detect, according to GB GB/T 12470-2003 standard code, cooperate petroleum pipeline welding wire for submerged-arc welding H08MnMoTiB, carry out deposited metal composition analysis, deposited metal Mechanics Performance Testing.Welding conditions: the source of welding current is dc reverse connection, and weld heat input is between 18-19KJ/cm, road temperature 145-150 ℃.
1. deposited metal composition percentage by weight measured value: (%)
| Chemical element | C | S | Mn | Si | P | Ni | Mo | Ti | B |
| Measured value | 0.047 | 0.003 | 1.67 | 0.70 | 0.015 | 0.75 | 0.35 | 0.014 | 0.0035 |
2. deposited metal mechanical property measured value
Embodiment four
(1) various raw-material weight percentages such as following table in the solder flux medicinal powder: (%)
| Calcirm-fluoride | Barium fluoride | Bauxite | The calcining alpha-type aluminum oxide | White fused alumina | Magnesia | Calcium oxide |
| 8 | 8 | 7 | 10 | 9 | 8 | 5 |
| Silica | Barium titanate | The manganese ore powder | Manganeisen | Metallic nickel | Antaciron | Ferro-boron |
| 0.6 | 0.4 | 26 | 6 | 2 | 9 | 1 |
MnO content 〉=62% in the manganese ore powder wherein, Si content 〉=72% in the Antaciron, B content 〉=15% in the ferro-boron
(2) adhesive is high mould potassium-sodium water glass, and modulus is that 3.0-3.1, potassium sodium ratio are 2: 1.
(3) make submerged arc welding flux according to mentioned component and detect, according to GB GB/T 12470-2003 standard code, cooperate petroleum pipeline welding wire for submerged-arc welding H08MnMoTiB, carry out deposited metal composition analysis, deposited metal Mechanics Performance Testing.Welding conditions: the source of welding current is dc reverse connection, and weld heat input is between 18-19KJ/cm, road temperature 145-150 ℃.
1. deposited metal composition percentage by weight measured value: (%)
| Chemical element | C | S | Mn | Si | P | Ni | Mo | Ti | B |
| Measured value | 0.048 | 0.003 | 1.61 | 0.86 | 0.016 | 0.77 | 0.34 | 0.012 | 0.0037 |
2. deposited metal mechanical property measured value
Embodiment five
(1) various raw-material weight percentages such as following table in the solder flux medicinal powder: (%)
| Calcirm-fluoride | Barium fluoride | Bauxite | The calcining alpha-type aluminum oxide | White fused alumina | Magnesia | Calcium oxide |
| 7 | 9 | 9 | 10 | 7 | 8 | 5 |
| Silica | Barium titanate | The manganese ore powder | Manganeisen | Metallic nickel | Antaciron | Ferro-boron |
| 0.8 | 0.2 | 30 | 5 | 2 | 6 | 1 |
MnO content 〉=62% in the manganese ore powder wherein, Si content 〉=72% in the Antaciron, B content 〉=15% in the ferro-boron
(2) adhesive is high mould potassium-sodium water glass, and modulus is that 3.0-3.1, potassium sodium ratio are 2: 1.
(3) make submerged arc welding flux according to mentioned component and detect, according to GB GB/T 12470-2003 standard code, cooperate petroleum pipeline welding wire for submerged-arc welding H08MnMoTiB, carry out deposited metal composition analysis, deposited metal Mechanics Performance Testing.Welding conditions: the source of welding current is dc reverse connection, and weld heat input is between 18-19KJ/cm, road temperature 145-150 ℃.
1. deposited metal composition percentage by weight measured value: (%)
| Chemical element | C | S | Mn | Si | P | Ni | Mo | Ti | B |
| Measured value | 0.047 | 0.004 | 1.62 | 0.75 | 0.014 | 0.73 | 0.33 | 0.015 | 0.0039 |
2. deposited metal mechanical property measured value
Embodiment six
(1) various raw-material weight percentages such as following table in the solder flux medicinal powder: (%)
| Calcirm-fluoride | Barium fluoride | Bauxite | The calcining alpha-type aluminum oxide | White fused alumina | Magnesia | Calcium oxide |
| 8 | 8 | 9 | 7 | 9 | 8 | 5 |
| Silica | Barium titanate | The manganese ore powder | Manganeisen | Metallic nickel | Antaciron | Ferro-boron |
| 0.8 | 0.2 | 31 | 5.5 | 1.5 | 6 | 1 |
MnO content 〉=62% in the manganese ore powder wherein, Si content 〉=72% in the Antaciron, B content 〉=15% in the ferro-boron
(2) adhesive is high mould potassium-sodium water glass, and modulus is that 3.0-3.1, potassium sodium ratio are 2: 1.
(3) make submerged arc welding flux according to mentioned component and detect, according to GB GB/T 12470-2003 standard code, cooperate petroleum pipeline welding wire for submerged-arc welding H08MnMoTiB, carry out deposited metal composition analysis, deposited metal Mechanics Performance Testing.Welding conditions: the source of welding current is dc reverse connection, and weld heat input is between 18-19KJ/cm, road temperature 145-150 ℃.
1. deposited metal composition percentage by weight measured value: (%)
| Chemical element | C | S | Mn | Si | P | Ni | Mo | Ti | B |
| Measured value | 0.046 | 0.005 | 1.68 | 0.69 | 0.014 | 0.70 | 0.34 | 0.015 | 0.0035 |
[0084]2. deposited metal mechanical property measured value
By above-mentioned soldering test, verify combination property of the present invention, obtain following result:
1. solder flux of the present invention is in welding process, take off slag easily, the welding bead moulding is attractive in appearance, welds under large welding parameter condition, has very good processing performance, can satisfy the welding requirements of efficient high-speed.
2. solder flux of the present invention is sintered flux, alloying element can be transitioned in the weld seam, can effectively replenish the alloying element scaling loss in the welding process, guarantees combination property.
3. solder flux of the present invention can satisfy high intensity levels petroleum pipeline welding demand, has very high tensile strength and low-temperature impact toughness.
In sum, the special-purpose submerged arc welding flux of petroleum pipeline of the present invention, welding performance is good, and appearance of weld is attractive in appearance, and its weld seam chemical composition, mechanical property all can satisfy the welding of petroleum pipeline to be used, and can guarantee welding quality.
The present invention is not limited to above-mentioned preferred forms, and other any identical with the present invention or akin products that anyone draws under enlightenment of the present invention all drop within protection scope of the present invention.
Claims (6)
1. the special-purpose submerged arc welding flux of petroleum pipeline comprises solder flux medicinal powder and adhesive, it is characterized in that, solder flux medicinal powder comprises the component of following percentage by weight:
The percentage by weight sum of above each component is 100%, MnO content 〉=62% in the manganese ore powder wherein, Si content 〉=72% in the Antaciron, B content 〉=15% in the ferro-boron.
2. the special-purpose submerged arc welding flux of petroleum pipeline as claimed in claim 1, it is characterized in that: described fluoride mixture is the mixture of two kinds of fluorides, described alundum (Al2O3) mixture is the mixture of three kinds of different phase structure alundum (Al2O3)s, and described basic anhydride mixture is the mixture of two kinds of basic anhydride.
3. the special-purpose submerged arc welding flux of petroleum pipeline as claimed in claim 1 or 2, it is characterized in that: described fluoride is comprised of calcirm-fluoride and barium fluoride.
4. the special-purpose submerged arc welding flux of petroleum pipeline as claimed in claim 1 or 2, it is characterized in that: described alchlor is comprised of bauxite, calcining alpha-type aluminum oxide, white fused alumina.
5. as claimed in claim 1 or 2; The special-purpose submerged arc welding flux of petroleum pipeline, it is characterized in that: described basic anhydride are magnesia and calcium oxide.
6. the special-purpose submerged arc welding flux of petroleum pipeline as claimed in claim 1, it is characterized in that: described adhesive is high mould potassium-sodium water glass, and modulus is that 3.0-3.1, potassium sodium mass ratio are 2: 1, and the part by weight of high mould potassium-sodium water glass and solder flux medicinal powder is 25%.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816106A (en) * | 2015-05-22 | 2015-08-05 | 天津市永昌焊丝有限公司 | Special submerged arc horizontal welding flux for pressure-bearing storage tank |
| CN104827209A (en) * | 2015-05-28 | 2015-08-12 | 孟红琳 | Preparing method for submerged-arc welding agent for petroleum pipeline |
| CN106493382A (en) * | 2016-10-07 | 2017-03-15 | 常州市鼎升环保科技有限公司 | A kind of preparation method without soldering powder |
| CN108015453A (en) * | 2017-12-05 | 2018-05-11 | 河南科技大学 | A kind of nickel-base alloy submerged-arc welding sintered flux and preparation method and application |
| CN109530975A (en) * | 2018-12-29 | 2019-03-29 | 天津市金桥焊材集团有限公司 | A kind of high-alkali high-strength and high ductility submerged arc sintered flux |
| CN110052739A (en) * | 2019-05-15 | 2019-07-26 | 天津市永昌焊丝有限公司 | A kind of high-strength and high ductility submerged-arc horizontal solder flux and its preparation method and application |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816106A (en) * | 2015-05-22 | 2015-08-05 | 天津市永昌焊丝有限公司 | Special submerged arc horizontal welding flux for pressure-bearing storage tank |
| CN104827209A (en) * | 2015-05-28 | 2015-08-12 | 孟红琳 | Preparing method for submerged-arc welding agent for petroleum pipeline |
| CN104827209B (en) * | 2015-05-28 | 2016-08-24 | 新昌县康泓机械科技有限公司 | A kind of preparation method of petroleum pipeline submerged arc welding flux |
| CN106493382A (en) * | 2016-10-07 | 2017-03-15 | 常州市鼎升环保科技有限公司 | A kind of preparation method without soldering powder |
| CN108015453A (en) * | 2017-12-05 | 2018-05-11 | 河南科技大学 | A kind of nickel-base alloy submerged-arc welding sintered flux and preparation method and application |
| CN109530975A (en) * | 2018-12-29 | 2019-03-29 | 天津市金桥焊材集团有限公司 | A kind of high-alkali high-strength and high ductility submerged arc sintered flux |
| CN110052739A (en) * | 2019-05-15 | 2019-07-26 | 天津市永昌焊丝有限公司 | A kind of high-strength and high ductility submerged-arc horizontal solder flux and its preparation method and application |
| CN110052739B (en) * | 2019-05-15 | 2022-06-28 | 天津市永昌焊丝有限公司 | High-strength high-toughness transverse submerged arc welding flux and preparation method and application thereof |
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| CN102922175B (en) | 2014-12-24 |
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