CN102689106B - Vertical electro-gas welding metal-cored flux-cored welding wire for petroleum storage tank - Google Patents
Vertical electro-gas welding metal-cored flux-cored welding wire for petroleum storage tank Download PDFInfo
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- CN102689106B CN102689106B CN201210193326.1A CN201210193326A CN102689106B CN 102689106 B CN102689106 B CN 102689106B CN 201210193326 A CN201210193326 A CN 201210193326A CN 102689106 B CN102689106 B CN 102689106B
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Abstract
The invention provides a vertical electro-gas welding metal-cored flux-cored welding wire for a petroleum storage tank, wherein the vertical electro-gas welding metal-cored flux-cored welding wire for the petroleum storage tank consists of flux powder and an external stainless steel tape, and is characterized in that a flux powder occupies 24-28% of the total weight of the welding wire, wherein the flux powder comprises the following component in percentage by weight (based on the weight of the flux powder): 5-10% of electrolytic manganese, 1-6.75% of silicon iron, 0.5-3% of molybdenum powder, 2-8% of ferrotitanium, 2-8% of nickel powder, 2-5% of sodium fluoride, 0.5-2% of lithium fluoride, 1-5% of sodium fluosilicate, 0.1-0.5% of ferroboron, 1-5% of magnesium powder, and 65-80% of ferrous powder. The flux-cored welding wire provided by the invention can be used for welding 610MPa high-intensity large wire energy steel, the welding quality is good, the welding line is molded once, and the efficiency is high.
Description
Technical field
The invention belongs to the welding field in Materials Processing Engineering, more specifically, relate to the flux-cored wire that a kind of deposited metal that utilizes carbon steel steel band to wrap up multiple alloy powder and a small amount of mineral dust manufacture is 12MnNiVR and B610E and external corresponding steel grade, it is mainly used in storage tank side plate, also can be used for the butt weld of the cut deal such as box beam web, metallurgy high furnace of the shell of vertical position welding boats and ships and various internals, bridge.
Background technology
In order to guarantee Chinese energy safety, country set up national strategic oil storage since the first half of the year in 2003, and plan realized the oil reserve long-term goal of 90 days by 2015.The precondition that realizes this target is to build for 10 of oil storage～150,000 m
3the Large Oil Tank of (or volume is larger).Medium in petroleum storage tank belongs to inflammable dangerous material.Therefore, building the required steel of storage tank and wlding need, after the authoritative quality testing department authentication of country's appointment, can use.
The feature of vertical electro-gas is cut deal welding one-shot forming, weld heat input is very large, weld metal toughness is difficult to up to standard, for mother metal, when vertical electro-gas welding, the maximum temperature of melt run near zone exceedes 1400 ℃, and this region crystal grain becomes very thick, and coarse grain zone is widened, HAZ low-temperature impact toughness reduces, strength decreased.
At present, the extensive storage tank of building of China is volume 100,000 m
3, its wallboard mainly adopts the Large Heat Input Welding high-strength steel sheet of 610MPa.The supporting wlding of 610MPa high strength, high heat input energy dimension is vertical electro-gas flux-cored wire special, and at present complete dependence on import, is mainly the EG-60 of nippon and the DWS-60G of refreshing steel.Once had the domestic authoritative unit long period to study, but result can not meet the demands, larger with external product gap, finally abandon.
For above-mentioned situation, develop the supporting wlding vertical electro-gas of a kind of 610MPa high strength, high heat input energy dimension flux-cored wire special ZY-EG60.With carbon steel steel band parcel alloy powder and mineral dust, make deposited metal reach the requirement of 610MPa high strength, high heat input energy dimension.
Summary of the invention
The object of the present invention is to provide the metal-cored flux-cored wire of a kind of petroleum storage tank vertical electro-gas, can be used for welding 610MPa high strength, high heat input energy dimension, welding quality is good, weld seam one-shot forming, and efficiency is high.
To achieve these goals, the present invention is by the following technical solutions:
A kind of metal-cored flux-cored wire of vertical electro-gas for petroleum storage tank, formed by medicinal powder and external application stainless steel band, described medicinal powder accounts for 24～28% of welding wire gross weight, and the percentage by weight that the each component of its traditional Chinese medicine powder accounts for medicinal powder is: electrolytic manganese 5～10%, ferrosilicon 1～6.75%, molybdenum powder 0.5～3%, ferrotianium 2～8%, nickel powder 2～8%, sodium fluoride 2～5%, lithium fluoride 0.5～2%, prodan 1～5%, ferro-boron 0.1～0.5%, magnesium powder 1～5%, iron powder 65～80%.
Flux-cored wire as above, preferably, described external application stainless steel band is H08A carbon steel steel band.
Flux-cored wire as above, preferably, described flux-cored wire and domestic 610MPa level petroleum storage tank high strength, high heat input energy reach matched well with steel 12MnNiVR and B610E and external corresponding steel grade in chemical composition, mechanical property.
Flux-cored wire as above, preferably, the diameter of described flux-cored wire is between 1.5mm～1.6mm.
Flux-cored wire as above, preferably, described flux-cored wire is applicable to the welding that heat input is not more than 180KJ/cm.
Vertical electro-gas flux-cored wire as above, it is main slag system that this welding wire adopts NaF+MgO, the quantity of slag is in 2% scope.Welding wire adopts part powder pretreatment (the removal crystallization water), adds less containing the material of the crystallization water as far as possible, adds the methods such as rare earth to reduce diffusible hydrogen content, and its welding technology diffusible hydrogen content is lower than 4mL/100g.The weld metal brittle transition temperature of described welding wire is well below 40 degrees below zero, and welding wire welding technological properties is good, can adapt to the welding of irregular groove size steel plate.
The preparation method of described flux-cored wire adopts following steps:
1, steel band is rolled into U-shaped, in U-lag, adds the medicinal powder of the present invention that accounts for welding wire gross weight 24～28% of the present invention;
2, U-lag is healed up, medicinal powder is wrapped up wherein, by road drawing, tube reducing, finally make it reach 1.6mm left and right by wire drawing die, obtain final product.
Beneficial effect of the present invention is:
Flux-cored wire appearance of weld of the present invention is attractive in appearance, and welding technological properties is good, welding cut deal once-forming, and production efficiency is high.This welding wire is mainly used in storage tank side plate, also can be used for the welding of the butt weld of the cut deal such as box beam web, metallurgy high furnace of the shell of vertical position welding boats and ships and various internals, bridge.
The specific embodiment
The invention provides the metal-cored flux-cored wire of a kind of petroleum storage tank vertical electro-gas, wherein, the effect of the main component in this welding wire medicine core is as follows:
Fe powder: to weld seam transition metal, improve conductance.
Ferrosilicon: fusing point, viscosity, surface tension and the mobility of capable of regulating slag, the admittedly molten invigoration effect of silicon is very strong, thereby can effectively improve the intensity of weld seam, can make toughness decline but content exceedes certain limit.Aspect metallurgical, silicon is good deoxidier and can prevents CO pore, therefore, in weld seam, should contain a certain amount of silicon, but it should be noted that deoxidation products easily forms silicate, produce slag inclusion, the silicate of low melting point may cause solidification cracking, in addition silicate also can increase the viscosity of slag and deposite metal, causes more serious splashing, and affects welding quality.
Ferrotianium: have deoxidation, and can improve the stability of electric arc, appropriate Ti and B impels weld seam in the time solidifying, to separate out acicular ferrite simultaneously, thereby play the effect that improves weld metal toughness, in the present invention, Ti adds with the form of ferrotianium, and its amount ranges is 2～8% of welding wire core wire gross weight, when Ti content is less than 2 or while being greater than 8, weld metal intensity rises, toughness drop.
Electrolytic manganese: mainly, as deoxidier, also there is certain alloying effect, simultaneously also favourable to desulfurization.In addition when manganese is oxidized, emit amount of heat, improve bath temperature, be conducive to metallurgical reaction.
Molybdenum powder: can effectively improve the intensity of weld metal and reach the effect that improves toughness by crystal grain thinning, the molybdenum adding too much can improve heat resistance, and improves the tendency of hardenability of heat affected area, increases crack sensitivity.
Nickel powder: Ni can effectively improve toughness.Its amount ranges is 2～8% of welding wire core wire gross weight.While being less than 2%, act on not obviously, while being greater than 8%, can not effectively mate with Mn, Si, ballistic work declines on the contrary, and crack resistance is poor.
Fluoride: can improve the anti-pore ability of welding wire, reduce the content of diffusible hydrogen, guarantee to a certain extent weld seam low-temperature flexibility.
The flux-cored wire of following each embodiment, is all to be rolled out by medicine core wire drawing machine, the steps include:
A. selecting width is 12～13.5mm, the carbon steel steel band that thickness is 0.7～0.9mm;
B. first steel band is rolled into U-shaped, be-80 object mixed powders (granularity that is medicinal powder powder all can be passed through 80 mesh sieves) to adding granularity in U-lag again, the filling rate of medicinal powder (be the percentage that medicinal powder weight accounts for welding wire gross weight, lower with) is 24～28%, U-lag is healed up, medicinal powder is wrapped up wherein.
Embodiment 1
Select 12 × 0.9mm(to represent that the width of steel band is 12mm, thickness is 0.9mm, hereinafter adopts same form of presentation) H08A carbon steel steel band, be first rolled into U-shaped.Get 6% electrolytic manganese, 3% ferrosilicon, 1% molybdenum powder, 5% ferrotianium, 5% nickel powder, sodium fluoride 2.5%, lithium fluoride 0.5%, prodan 2%, 0.1% ferro-boron, 2% magnesium powder, 72.9% iron powder, the granularity of each powder of getting all can be passed through 80 mesh sieves.Got various powder are put into mixed powder machine and mix 45 minutes, then mixed-powder is added in U-shaped H08A carbon steel steel band groove, filling rate is 24%, and U-lag is healed up, and it is wrapped up medicinal powder wherein, then use wire drawing die by road drawing, tube reducing to 1.56mm.The in the situation that of unprotect gas, weld, welding current 350～400A, weldingvoltage 38～46V, speed of welding 1.18mm/sec, surveys weld seam ballistic work after welding, and ballistic work numerical value is in table 1.
Embodiment 2
The H08A carbon steel steel band of selecting 13 × 0.9mm, is first rolled into U-shaped.Get 7% electrolytic manganese, 3% ferrosilicon, 1.5% molybdenum powder, 4% ferrotianium, 3.5% nickel powder, sodium fluoride 2.5%, lithium fluoride 0.5%, prodan 2%,, 0.1% ferro-boron, 2% magnesium powder, 73.9% iron powder, the granularity of each powder of getting all can be passed through 80 mesh sieves.Got various powder are put into mixed powder machine and mix 45 minutes, then mixed-powder is added in U-shaped H08A carbon steel steel band groove, filling rate is 25%, and U-lag is healed up, and it is wrapped up medicinal powder wherein, then use wire drawing die by road drawing, tube reducing to 1.56mm.The in the situation that of unprotect gas, weld, welding current 350～400A, weldingvoltage 38～46V, speed of welding 1.20mm/sec, surveys weld seam ballistic work after welding, and ballistic work numerical value is in table 1.
Embodiment 3
The H08A carbon steel steel band of selecting 13 × 0.8mm, is first rolled into U-shaped.Get 6% electrolytic manganese, 4% ferrosilicon, 1% molybdenum powder, 6% ferrotianium, 5% nickel powder, sodium fluoride 2.5%, lithium fluoride 0.5%, prodan 2%,, 0.1% ferro-boron, 2% magnesium powder, 70.9% iron powder, the granularity of each powder of getting all can be passed through 80 mesh sieves.Got various powder are put into mixed powder machine and mix 45 minutes, then mixed-powder is added in U-shaped H08A carbon steel steel band groove, filling rate is 25%, and U-lag is healed up, and it is wrapped up medicinal powder wherein, then use wire drawing die by road drawing, tube reducing to 1.56mm.The in the situation that of unprotect gas, weld, welding current 350～400A, weldingvoltage 38～46V, speed of welding 1.17mm/sec, surveys weld seam ballistic work after welding, and ballistic work numerical value is in table 1.
Embodiment 4
The H08A carbon steel steel band of selecting 13 × 0.7mm, is first rolled into U-shaped.Get 8% electrolytic manganese, 5% ferrosilicon, 1.5% molybdenum powder, 5% ferrotianium, 6% nickel powder, sodium fluoride 2.5%, lithium fluoride 0.5%, prodan 2%,, 0.1% ferro-boron, 2% magnesium powder, 67.4% iron powder, the granularity of each powder of getting all can be passed through 80 mesh sieves.Got various powder are put into mixed powder machine and mix 45 minutes, then mixed-powder is added in U-shaped H08A carbon steel steel band groove, filling rate is 26%, and U-lag is healed up, and it is wrapped up medicinal powder wherein, then use wire drawing die by road drawing, tube reducing to 1.56mm.The in the situation that of unprotect gas, weld, welding current 350～400A, weldingvoltage 38～46V, speed of welding 1.19mm/sec, surveys weld seam ballistic work after welding, and ballistic work numerical value is in table 1.
Table 1 embodiment effect
From the result of table 1, after the flux-cored wire that adopts embodiment 1～4 to provide welds, its deposited metal and weld seam index all meet national standard, meet the vertical electro-gas welding requirements of large-scale petroleum storing tank, and wherein the performance of embodiment 3 and 4 significantly higher than embodiment 1 and 2.
Claims (5)
1. the metal-cored flux-cored wire of vertical electro-gas for petroleum storage tank, formed by medicinal powder and external application stainless steel band, it is characterized in that, described medicinal powder accounts for 24～28% of welding wire gross weight, and the percentage by weight that the each component of its traditional Chinese medicine powder accounts for medicinal powder is: electrolytic manganese 5～10%, ferrosilicon 1～6.75%, molybdenum powder 0.5～3%, ferrotianium 2～8%, nickel powder 2～8%, sodium fluoride 2～5%, lithium fluoride 0.5～2%, prodan 1～5%, ferro-boron 0.1～0.5%, magnesium powder 1～5%, iron powder 65～80%.
2. flux-cored wire as claimed in claim 1, is characterized in that, described external application stainless steel band is H08A carbon steel steel band.
3. flux-cored wire as claimed in claim 1 or 2, is characterized in that, described flux-cored wire is applicable to 610MPa level petroleum storage tank steel 12MnNiVR and B610E.
4. flux-cored wire as claimed in claim 1 or 2, is characterized in that, the diameter of described flux-cored wire is between 1.5mm～1.6mm.
5. flux-cored wire as claimed in claim 1 or 2, is characterized in that, described flux-cored wire is applicable to the welding that heat input is not more than 180KJ/cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210193326.1A CN102689106B (en) | 2012-06-12 | 2012-06-12 | Vertical electro-gas welding metal-cored flux-cored welding wire for petroleum storage tank |
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| CN201210193326.1A CN102689106B (en) | 2012-06-12 | 2012-06-12 | Vertical electro-gas welding metal-cored flux-cored welding wire for petroleum storage tank |
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| CN102689106B true CN102689106B (en) | 2014-07-02 |
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Families Citing this family (7)
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| US20140263193A1 (en) * | 2013-03-15 | 2014-09-18 | Lincoln Global, Inc. | Consumable and method and system to utilize consumable in a hot-wire system |
| CN104139250B (en) * | 2014-08-04 | 2016-06-08 | 天津市永昌焊丝有限公司 | A kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method |
| CN104148824B (en) * | 2014-09-01 | 2015-12-09 | 四川大西洋焊接材料股份有限公司 | A kind of high tenacity flux-cored wire for electrogas arc welding |
| CN104259688B (en) * | 2014-09-17 | 2016-04-13 | 山东聚力焊接材料有限公司 | Large-line energy electro-gas (enclosed) welding flux-cored wire and preparation method thereof |
| CN106312367A (en) * | 2016-09-07 | 2017-01-11 | 北京智双科技发展有限公司 | Gas-shielded flux-cored wire for welding x80 pipeline steel |
| CN108788515B (en) * | 2018-04-26 | 2020-12-18 | 洛阳双瑞特种合金材料有限公司 | Seamless flux-cored powder for welding LPG ship, submerged arc welding wire, preparation and application |
| CN112122820B (en) * | 2020-09-29 | 2022-03-04 | 天津市永昌焊丝有限公司 | Acidic high-strength high-toughness flux-cored wire |
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Effective date of registration: 20210121 Address after: 100088 Beijing city Haidian District Xitucheng Road No. 33 Patentee after: CHINA JINGYE ENGINEERING Co.,Ltd. Patentee after: CENTRAL RESEARCH INSTITUTE OF BUILDING AND CONSTRUCTION CO., LTD. MCC Group Address before: 101106 No.2, liangliwu street, East District, Tongzhou Economic Development Zone, Tongzhou District, Beijing Patentee before: ZHONGYE WELDING TECHNOLOGY Co.,Ltd. Patentee before: CENTRAL RESEARCH INSTITUTE OF BUILDING AND CONSTRUCTION CO., LTD. MCC Group |
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