CN100515655C - Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding - Google Patents
Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding Download PDFInfo
- Publication number
- CN100515655C CN100515655C CNB2007100529227A CN200710052922A CN100515655C CN 100515655 C CN100515655 C CN 100515655C CN B2007100529227 A CNB2007100529227 A CN B2007100529227A CN 200710052922 A CN200710052922 A CN 200710052922A CN 100515655 C CN100515655 C CN 100515655C
- Authority
- CN
- China
- Prior art keywords
- welding
- welding wire
- content
- fluoride
- gross weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003466 welding Methods 0.000 title claims abstract description 131
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 8
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 7
- 239000003814 drug Substances 0.000 claims abstract description 29
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims abstract description 16
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 14
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 13
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 11
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 10
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 4
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 12
- 239000010962 carbon steel Substances 0.000 claims description 12
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- 229910052797 bismuth Inorganic materials 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 229940079593 drug Drugs 0.000 abstract description 4
- 229910000922 High-strength low-alloy steel Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 29
- 238000012360 testing method Methods 0.000 description 26
- 239000011572 manganese Substances 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 229910052742 iron Inorganic materials 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 10
- 239000002893 slag Substances 0.000 description 10
- 239000010936 titanium Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 241000538562 Banjos Species 0.000 description 8
- 238000005336 cracking Methods 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 230000007812 deficiency Effects 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000003500 flue dust Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 229910052845 zircon Inorganic materials 0.000 description 4
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 239000008358 core component Substances 0.000 description 3
- 238000006356 dehydrogenation reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 3
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910000616 Ferromanganese Inorganic materials 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 206010057071 Rectal tenesmus Diseases 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 229910052656 albite Inorganic materials 0.000 description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 208000012271 tenesmus Diseases 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229910004356 Ti Raw Inorganic materials 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 1
- 229910001515 alkali metal fluoride Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- -1 rare earth metal fluoride Chemical class 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Nonmetallic Welding Materials (AREA)
Abstract
Disclosed is a low alloy steel drug core welding wire used in the carbon dioxide arc welding. The components of the drug core and the content occupying the total weight of the welding wire(percent ratio) are as following: Ti01 3-6, Si 0.3-0.5, Mn 1.5-3.2, Si02 0.1-0.8,Zr02 0.1-0.5, Fe 2-7, Al plus Mg 0.5-1.2, Ni 0.5 -5, B 0.002-0.015, Ti 0.1-0.3; oxide or fluoride of alkali metal K, Na and Li is converted into the content of K, Na and Li, that is, 0.1-0.35; the content of fluoride F is 0.05-0.2; fluoride or oxide of rare earth metal is converted into the content of the rare earth metal, that is, 0.005-0.2; the product of the contents of C, Si and Mn in the welding wire is 0.058-0.11. The invention has good process property for the whole position welding of high strength low alloy steel, and can keep good stability of electric arc and welding operating property in the conditions of large current and fast-speed welding with smooth welding seam, high connecting intensity, good impact toughness minus 40 DEG C low temperature and good crack resistance.
Description
Affiliated technical field
The present invention relates to the wlding that metal solder is used, be meant a kind of low alloy steel flux-cored welding wire for carbon dioxide gas protection welding particularly.
Background technology
The advantage of CO 2 gas-shielded flux-cored wire welding is compatible welding rod and the welding of gas shield solid core welding wire, its production efficiency height, welding technological properties is good.Therefore this welding manner has obtained using widely in steel construction processing and manufacturing processes such as boats and ships, bridge.Just because of this, at present also more and more higher to the functional requirement of flux-cored wire, require flux-cored wire not only can adapt to speed of welding faster, and have good arc stability and welding operation performance; The Chinese patent notification number: CN 1775452C, the day for announcing: on May 24th, 2006, denomination of invention is " carbon steel cored solder wire for gas-shielded arc welding ", has proposed to contain TiO
2, Si, Mn, SiO
2, ZrO
2Fe, Al, Mg, the oxide of alkali metal K, Na, Li or fluoride, the full position flux-cored wire of raw materials such as rare earth metal, this welding wire arc stability is good, and weld seam is level and smooth, under-20 ℃ of conditions, have good low-temperature impact flexibility, be suitable for the regular tenacity carbon steel material of weld strength below 500MPa.At present, 500MPa on intensity, 550MPa, 600MPa, 650MPa, the application of the Hi-Stren steel of 700MPa level is more and more, particularly has good low-temperature impact toughness in requirements such as the bridge of northern cold zone, engineering machinery under-40 ℃.Above-mentioned flux-cored wire obviously is unsuitable for the all-position welding of Hi-Stren steel, and can't guarantee at the low-temperature impact toughness below-40 ℃.
Summary of the invention
The objective of the invention is can't be applicable at existing welding wire the welding of Hi-Stren steel, its bonding strength, low-temperature impact toughness, cracking resistance aspect are difficult to reach requirement and provide that a kind of arc stability is good, low-temperature impact toughness is good, crack resistance is good, weld seam smoothly reaches the well behaved low alloy steel flux-cored welding wire for carbon dioxide gas protection welding of composite technology.It is applicable to 500MPa, 550MPa, 600MPa, 650MPa, the welding of rank Hi-Stren steels such as 700MPa.
Technical solution of the present invention is: a kind of low alloy steel flux-cored welding wire for carbon dioxide gas protection welding; comprise carbon steel crust and medicine core; weight % is: mild steel crust 80-90, it is as follows that medicine core 10-20, the composition of described medicine core and content account for welding wire gross weight %: TiO
23-6, Si 0.3-0.5, Mn 1.5-3.2, SiO
20.1-0.8, ZrO
20.1-0.5, Fe 2-7, Al+Mg 0.5-1.2, Ni 0.5-5, B 0.002-0.015, Ti 0.1-0.3, the oxide of alkali metal K, Na, Li or fluoride are amounted to the content 0.1-0.35 of K, Na, Li, K 0.03-0.07 wherein, Na or Li or both sums are 0.06-0.28, fluoride F is 0.05-0.2, and the fluoride of rare earth metal or oxide are amounted to rare earth metal to account for welding wire gross weight % be 0.005-0.2, and to account for welding wire gross weight % be 0.058-0.11 to the product of C, Si, Mn three's content in the described welding wire.
Also adding in the medicine core of the present invention has among Cr and the Mo one or both, and its content accounts for welding wire gross weight % and is 0.2-0.8.
To account for welding wire gross weight % be 0.06-0.15 to the content of C in medicine core of the present invention and the carbon steel crust.
Oxide TiO in the medicine core of the present invention
2+ SiO
2+ ZrO
2The content sum to account for welding wire gross weight % be 4.0-7.5.
To account for welding wire gross weight % be 0.001-0.012 to the content of B in the medicine core of the present invention.
B/Ti is 0.05-0.2 in the medicine core of the present invention.
In medicine core of the present invention and the carbon steel crust content sum of other compositions S, P, Sn and Bi account for welding wire gross weight % should be less than 0.035, wherein S is less than 0.015, P is less than 0.020, Sn is less than 0.001, Bi is less than 0.001.
Medicine core of the present invention and carbon steel crust design of chemical composition thinking are as follows:
TiO
2Be main slag former, arc stabilizer improves the moulding of weld seam and takes off slag, is the all-position welding indispensable material.Titanium in the ilmenite is amounted to TiO
2Addition is less than at 3% o'clock can not embody above-mentioned characteristic, greater than 6% o'clock because the oxygen content height, low-temperature impact toughness reduces, the slag blanket thickening influence gas easily generation pore of overflowing from the molten bath.Therefore be limited to 3-6.But tend to contain the Sn element in TiO2 raw material rutile, the too high levels of Sn can cause weld seam to crack, so the content of reply Sn is controlled.
C comprises C in the steel crust and the C in the medicine core, splashes and flue dust from reduction, and C is low more good more, wish below 0.02%, but collateral security weld metal mechanical property and molten iron flowability content at 0.06%-0.15% for well.Too high greater than 0.15% o'clock weld metal intensity, low-temperature impact toughness reduces, the flue dust and the increase of splashing.Crack sensitivity increases.
Si is main deoxidier, reduces the oxygen content of weld metal, improves low-temperature impact toughness, regulates the flowability of molten iron, and addition is less than at 0.3% o'clock can not embody above-mentioned characteristic, becomes sticky greater than 0.5% o'clock molten iron, and weld strength is too high, and low-temperature impact toughness reduces.Therefore be limited to 0.3%-0.5%.
Mn is main deoxidier, reduces the oxygen content of weld metal, increases weld metal intensity and crack resistance, improve low-temperature impact toughness, regulate the flowability of molten iron, addition is less than at 1.5% o'clock and embodies above-mentioned characteristic deficiency, too high greater than 3.1% o'clock weld strength, low-temperature impact toughness reduces.Therefore be limited to 1.5%-3.1%.
The B crystal grain thinning can improve low-temperature impact toughness, is adding the fashionable significant raising impact flexibility effect that has simultaneously with C, Si, Mn, Ti.Through test, when B/Ti is 0.05-0.2, improve playing a role clearly of impact flexibility.And when the product of C, Si, Mn three's content is 0.058-0.11, can satisfy-40 ℃ impact flexibility.
SiO
2Be slag former, rise and regulate slag fusing point and viscosity that improve appearance of weld, favourable weld seam is to the mother metal rounding off.Addition is less than 0.1 can not embody above-mentioned characteristic, greater than 1% o'clock because the oxygen content height, low-temperature impact toughness reduces, and causes the welding slag sintering on the weld seam easily, therefore is limited to 0.1-0.8%.
ZrO
2Be the all-position welding indispensable material, can improve the fusing point of slag effectively, make it the good weld seam that is covered in, prevent the tenesmus of vertical position welding molten iron, reduce sinter thickness, help the eliminating of weld seam gas.Addition is less than at 0.1% o'clock can not embody above-mentioned characteristic, too high greater than 0.6% o'clock weld metal intensity, and low-temperature impact toughness reduces.Therefore be limited to 0.1%-0.5%.
Al, Mg are strong deoxidiers, (wherein contain aluminium and amount to into Al and Mg calculating) with magnesium oxide, improve low-temperature impact toughness, addition is less than at 0.3% o'clock and improves the low-temperature impact toughness scarce capacity, greater than 1.3% o'clock because deoxidation products contains eliminating and the appearance of weld that fusing point rising setting rate that aluminium and magnesium oxide make slag accelerates to be unfavorable for weld seam gas, welding bead protrudes during vertical position welding, easily produces air drain.Therefore be limited to 0.5%-1.2%.
Fe is an iron powder, can improve conditions at the arc, regulates molten iron fusing point and viscosity.Addition is less than at 2% o'clock and embodies above-mentioned characteristic deficiency, and greater than 7% o'clock vertical position welding degradation, it is big that flue dust becomes.Therefore be limited to 2%-7%.
Na
2O, K
2O, Li
2O is an arc stabilizer, amounts to wherein K, Na or the content of Li or both sums 0.06%-0.28% that accounts for the welding wire gross weight.Addition is less than 0.06% o'clock arc stability deficiency, and electric arc is too concentrated, and vertical position welding molten bath molten iron turns up, the electric arc instability.Addition is elongated greater than 0.28% o'clock electric arc, the flue dust and the increase of splashing, the tenesmus of vertical position welding molten iron.Amount to the 0.04%-0.07% that wherein K content accounts for the welding wire gross weight.K content is in 0.04% instability of electric arc when following, and vertical position welding molten bath molten iron turns up, and K content is 0.07% when above, and the weld seam low-temperature impact toughness reduces.
Fluoride NaF, KF, LiF are arc stabilizers, and the 0.05%-0.2% that F content accounts for the welding wire gross weight is amounted in the dehydrogenation agent.Addition is less than 0.05% o'clock arc stability deficiency, and the dehydrogenation scarce capacity easily produces the weld porosity load mould.Addition is greater than the 0.2% o'clock flue dust and the increase of splashing.When with fluoride NaF, KF, LiF as arc stabilizer, during the dehydrogenation agent, the content that must guarantee Na in the welding wire or Li or both sums accounts for the 0.06%-0.28% of welding wire gross weight, and should guarantee that the content of K in the welding wire accounts for the 0.04%-0.07% of welding wire gross weight.
Oxide TiO
2+ SiO
2+ ZrO
2=4%-7.5%, oxide TiO
2+ SiO
2+ ZrO
2Bad less than 4% o'clock all-position welding technology.Oxide TiO
2+ SiO
2+ ZrO
2Too high greater than 7.5% o'clock oxygen content, low-temperature impact toughness reduces, and easily produces the weld porosity load mould.
The fluoride of rare earth metal or oxide have fixedly hydrogen, nitrogen, improve the effect of low-temperature impact toughness, amount to the 0.005%-0.2% that rare earth metal fluoride or oxide content account for the welding wire gross weight.Less than 0.005% o'clock very little to the effect of fixedly hydrogen, nitrogen, caused the electric arc shakiness to splash to increase, influence appearance of weld to the dilution of slag is excessive greater than 0.2% o'clock.The fluoride of rare earth metal or oxide can be buied on market.
Ni is favourable to improving low-temperature impact toughness, and the adding scope is 0.5-5%.
Cr has the effect that improves intensity and quenching degree, improves the ability of anti-atmosphere of weld seam and seawater corrosion.But the effect that reduces low-temperature impact toughness and percentage elongation is arranged, and Cr content is 0.2-0.8.
Mo has the effect that improves intensity, and in the effect that certain limit can improve low-temperature impact toughness, surpassing 0.5 intensity increases too much, and low-temperature impact toughness descends, and content can be controlled in 0.2-0.8.
S, the P, Sn and the Bi unit that remain in welding wire medicine core and the carbon steel crust have the crackle tendency that increases weld seam, must carry out strict control.S＜0.015, P＜0.020, Sn＜0.001, Bi＜0.001, S, P, Sn, Bi sum are not more than 0.035.
The invention has the beneficial effects as follows: 1, at low-alloy steel is the instructions for use of Hi-Stren steel, B, Ni and Ti raw material have been increased, under the prerequisite that guarantees weld strength, and studied B and C, Si, Mn, Ti and added simultaneously improving the effect of impact flexibility, define clearly B/Ti than and C, Si, Mn three adding fashionable correlation, improved-40 ℃ of low-temperature impact toughness of weld seam effectively, make it to satisfy the applying working condition of Hi-Stren steel all-position welding.2, the oxide or the fluoride of adding rare earth metal improve its fixedly effect of hydrogen, nitrogen, have improved the low-temperature impact toughness of weld seam effectively.Add strong deoxidier Al, Mg, improved the low-temperature impact toughness of weld seam, help the discharge and the appearance of weld of weld seam gas.3, can add Cr, the Mo element of certain content according to the needs that use, can under the prerequisite that guarantees low-temperature impact toughness, increase weld seam corrosion resistance and weld strength.4, control oxide TiO
2+ SiO
2+ ZrO
2Addition, guaranteed the processing performance of flux-cored wire all-position welding.5, the content of S, P, Sn, Bi reduces the tendency that weld seam cracks in the strict control welding wire.6 control the content of C in the welding wire on the whole, have guaranteed the mechanical property of weld metal; Can keep good arc stability and welding operation performance under the condition of big electric current, rapid welding, its weld seam is level and smooth, and weld metal has good low-temperature impact toughness and good crack resistance.
Description of drawings
Fig. 1 is the product value of C among the present invention, Si, Mn three's content and the schematic diagram of ballistic work relation.
The specific embodiment
The present invention is described in further detail below in conjunction with description of drawings and the specific embodiment:
The steel crust of flux-cored wire adopts mild steel, and its chemical composition sees Table 1.
Table 1: the chemical composition % of flux-cored wire steel crust
| C | Si | Mn | S | P | Sn |
| 0.034 | 0.02 | 0.30 | 0.012 | 0.015 | 0.0001 |
In medicine core of the present invention and the carbon steel crust content sum of other compositions S, P, Sn and Bi account for welding wire gross weight % should be less than 0.035, wherein S is less than 0.015, P is less than 0.020, Sn is less than 0.001, Bi is less than 0.001.
The chemical analysis of medicine core powder and raw material formation see Table 2.
Table 2: the formation of medicine core powder
| Drug core component | Constitute | Content (accounting for welding wire %) |
| TiO 2 | The rutile reduced ilmenite | 4-6.5 |
| Ti | The Titanium ferrotianium | 0.1-0.3 |
| Si | The ferrosilicon silicomangan | 0.3-0.5 |
| Mn | Ferromanganese silicomangan manganese metal | 1.5-3.1 |
| SiO 2 | Quartzy potassium, albite zircon sand zircon | 0.1-0.8 |
| ZrO 2 | The zircon sand zircon | 0.1-0.5 |
| Fe | Iron powder silicomangan ferromanganese reduced ilmenite ferro-aluminum | 2-7 |
| Al+Mg | Ferro-aluminum almag magnesium powder | 0.5-1.2 |
| Alkali metal oxide | K (potassic feldspar, potassium) | 0.04-0.07 |
| Alkali metal oxide | Na or Li or both and (albite soda ash sodium silicate) | 0.06-0.28 |
| Alkali metal fluoride | NaF KF LiF | F：0.05-0.2 |
| Rare earth metal | The fluoride of rare earth metal or oxide | 0.005-0.2 |
| C | C in the steel crust, iron powder, silicomangan | 0.06-0.15 |
| B | The B2O3 ferro-boron | 0.02-0.12 |
| Ni | The Ni powder | 0.5-5 |
| Cr | The little carbon Cr of Metal Cr iron | 0.2-0.8 |
| Mo | Mo iron | 0.2-0.8 |
At the interior charge core powder of crust (wide 14 millimeters, thick 0.9 millimeter) that mild-carbon steel strip is made, filling rate 10%-20% obtains the finished product welding wire of diameter 1.0-1.6 millimeter behind the overmolding tube reducing.
Each component content of medicine core is changed the back press different-diameter, different filling rates are made welding wire and are tested.The diameter of its flux-cored wire, filling rate and medicine core each component see Table 3.
When B/Ti is 0.05-0.2, improve playing a role clearly of impact flexibility.And when the product of C, Si, Mn three's content is 0.058-0.11, can satisfy-40 ℃ impact flexibility.
Table 3: welding wire and medicine core component proportioning test table
Continuous table 3: welding wire and medicine core component proportioning test table
Annotate: other hurdles include rare earth metal etc.
And S, the P, Sn and the Bi unit that remain in welding wire medicine core and the carbon steel crust have the crackle tendency that increases weld seam, must carry out strict control.S＜0.015, P＜0.020, Sn＜0.001, Bi＜0.001, S, P, Sn, Bi sum are not more than 0.035.
The mechanical property soldering test, general welding condition: 20 millimeters of electrode extensions, CO
220 liters/minute of gas flows.
1. the deposited metal welding condition is referring to table 4.
Table 4: deposited metal Mechanics Performance Testing welding condition
| Project | Welding condition |
| Welding current | 220-240A |
| Weldingvoltage | 26-28V |
| The welding number of plies | 7 layer of 14 road |
| Temperature between the road | 150℃ |
| Speed of welding | 250 millimeters/minute |
| Weld width | The 2/3-4/5 weld width |
2. the banjo fixing butt jointing welding condition is referring to table 5.
Table 5: the horizontal banjo fixing butt jointing mechanics Mechanics Performance Testing welding condition of flat butt joint
| Project | Welding condition |
| Welding current | 200-240A |
| Weldingvoltage | 26-28V |
| The welding number of plies | 4 layer of 6 road |
| Temperature between the road | 150℃ |
| Speed of welding | 250 millimeters/minute |
| Weld width | The 2/3-1 weld width |
3. upright banjo fixing butt jointing welding condition is referring to table 6.
Table 6: upright banjo fixing butt jointing mechanics Mechanics Performance Testing welding condition
| Project | Welding condition |
| Welding current | 160-200A |
| Weldingvoltage | 26-28V |
| The welding number of plies | 4 layer of 6 road |
| Temperature between the road | 150℃-200℃ |
| Speed of welding | The 100-200 millimeter/minute |
| Weld width | The 2/3-1 weld width |
4. flat fillet weld welding condition is with reference to table 5, and the fillet welding in the vertical position welding condition is with reference to table 6.
The crack resistance soldering test
Cracking test:
One. tiltedly the Y cracking test carries out with reference to GB4675.1.Tiltedly Y cracking test welding current parameter is with reference to table 8
Two. the welding procedure cracking test
1) angle welding cracking test:
12 * 150 * 500 millimeters of angle welding test plate (panel) sizes, 3.5 millimeters in gap.Angle welding test plate (panel) material EH36, angle welding crazing-resistance test welding condition are with reference to table 7:
Table 7: angle welding crazing-resistance test welding condition
| Project | Welding condition |
| Welding current | 300A |
| Weldingvoltage | 30-32V |
| Weld gap | 3.2-4 millimeter |
| Fusion length | 450 millimeters |
| Speed of welding | The 320-400 millimeter/minute |
| Leg | 6.5 millimeter |
2). the banjo fixing butt jointing cracking test:
25 * 150 * 300 millimeters of banjo fixing butt jointing test plate (panel) sizes, groove 30 degree, 6 millimeters in gap, reverse side adds the cushions.Test plate (panel) material EH36 or 650MPa level low alloy high-strength steel plate.Banjo fixing butt jointing crazing-resistance test welding condition is with reference to table 8:
Table 8: banjo fixing butt jointing crazing-resistance test welding condition
| Project | Welding condition |
| Welding current | 220A |
| Weldingvoltage | 26-28V |
| Weld gap | 6 millimeters |
| Fusion length | 300 millimeters |
| Welding method | The liner single welding |
| Speed of welding | The 140-200 millimeter/minute |
| Throat depth | The 2-3 millimeter |
The equal flawless of above binomial cracking test.
The overall merit of test welding wire process performance
Through testing: the composition in the welding wire of sequence number D1-D16 all satisfies scope of the present invention, and arc stability takes off slag and appearance of weld is good, the pore-free air drain, good mechanical properties, weld strength and low-temperature impact toughness all satisfy the requirement of Hi-Stren steel, are adapted to all-position welding.
D17, D19.-D22, the D24-D26 welding wire process is functional, but the product of C * Mn * Si＜0.058 low-temperature impact toughness deficiency.
D18K＞0.07 electric arc is longer, the product of C * Mn * Si＜0.058 low-temperature impact toughness deficiency.
The D23 welding wire process is functional, but the product of C * Mn * Si＞0.11 low-temperature impact toughness deficiency, and the crackle tendency increases.
Table 9 welding wire mechanical property
| D18 | 470 | 565 | 32 | 46 |
| D19 | 570 | 675 | 20 | 38 |
| D20 | 520 | 600 | 28 | 42 |
| D21 | 560 | 640 | 24.5 | 35 |
| D22 | 560 | 635 | 25 | 30 |
| D23 | 625 | 700 | 22 | 47 |
| D24 | 610 | 670 | 19 | 41 |
| D25 | 670 | 735 | 13 | 33 |
| D26 | 710 | 760 | 20 | 40 |
Referring to Fig. 1, in test sequence number D1-D26, when the product of C, Si, Mn three's content was the 0.058%-0.11% of welding wire gross weight %, its ballistic work was all more than 47J as can be seen; When the product of C, Si, Mn three's content less than welding wire gross weight % 0.058% or greater than 0.11% the time, its ballistic work all is not higher than 47J.
Claims (1)
1. a low alloy steel flux-cored welding wire for carbon dioxide gas protection welding comprises carbon steel crust and medicine core, and weight % is: mild steel crust 80-90, medicine core 10-20 is characterized in that: it is as follows that the composition of described medicine core and content account for welding wire gross weight %: TiO
23-6, Si 0.3-0.5, Mn 1.5-3.2, SiO
20.1-0.8, ZrO
20.1-0.5, Fe 2-7, Al+Mg0.5-1.2, Ni 0.5-5, B0.002-0.015, Ti 0.1-0.3, the oxide of alkali metal K, Na, Li or fluoride are amounted to the content 0.1-0.35 of K, Na, Li, K 0.03-0.07 wherein, Na or Li or both sums are 0.06-0.28, it is 0.05-0.2 that fluoride is amounted to F, the fluoride of rare earth metal or oxide are amounted to rare earth metal, and to account for welding wire gross weight % be 0.005-0.2, also adding in the described medicine core has among Cr and the Mo one or both, and its content accounts for welding wire gross weight % and is 0.2-0.8, oxide TiO in the described medicine core
2+ SiO
2+ ZrO
2The content sum to account for welding wire gross weight % be 4.0-7.5, to account for welding wire gross weight % be 0.058-0.11 to the product of C, Si, Mn three's content in the described welding wire, the content sum of other compositions S, P, Sn and Bi accounts for welding wire gross weight % less than 0.035 in described medicine core and the carbon steel crust, wherein S is less than 0.015, P is less than 0.020, Sn is less than 0.001, and Bi is less than 0.001.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100529227A CN100515655C (en) | 2007-08-09 | 2007-08-09 | Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100529227A CN100515655C (en) | 2007-08-09 | 2007-08-09 | Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101104232A CN101104232A (en) | 2008-01-16 |
| CN100515655C true CN100515655C (en) | 2009-07-22 |
Family
ID=38998421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100529227A Expired - Fee Related CN100515655C (en) | 2007-08-09 | 2007-08-09 | Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100515655C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804529A (en) * | 2010-04-06 | 2010-08-18 | 天津大桥焊材集团有限公司 | Flux-cored wire for 50kg all-position welding fire-resistant and weather-resistant steel |
| CN102328156A (en) * | 2011-08-26 | 2012-01-25 | 武汉铁锚焊接材料股份有限公司 | Reduced ilmenite type flux-cored wire |
| CN104874942A (en) * | 2015-06-01 | 2015-09-02 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire and application thereof to automatic trolley welding in vertical direction |
| EP3778112A4 (en) * | 2018-03-28 | 2021-10-27 | Nippon Steel Corporation | METHOD FOR PRODUCING A FILLED WIRE, FILLED WIRE AND METHOD FOR PRODUCING A WELDED JOINT |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102233497A (en) * | 2010-04-21 | 2011-11-09 | 广东福维德焊接股份有限公司 | CO2 gas shielded flux cored wire for supporting welding of low alloy steel with strength of 590 MPa |
| CN102233498A (en) * | 2010-04-21 | 2011-11-09 | 广东福维德焊接股份有限公司 | CO2 gas protection flux-cored wire for matching welding of low-alloy steel with strength of 490 MPa |
| CN101804533A (en) * | 2010-04-27 | 2010-08-18 | 上海林肯电气有限公司 | Gas shielded flux-cored wire for welding with low temperature, high toughness and full positions |
| KR101220618B1 (en) * | 2010-12-27 | 2013-01-10 | 주식회사 포스코 | Flux cored arc weld wire having excellent workability and low-temperature toughness in weld metal joint and weld metal joint using the same |
| CN102179640B (en) * | 2011-04-26 | 2013-03-13 | 武汉铁锚焊接材料股份有限公司 | High-strength and high-toughness metal powder flux-cored wire |
| CN102785041B (en) * | 2011-05-17 | 2016-03-09 | 天津雷公焊接材料有限公司 | All positon alkaline gas protection flux-cored wire |
| CN102430877A (en) * | 2011-11-04 | 2012-05-02 | 武汉铁锚焊接材料股份有限公司 | Metal powder core type flux-cored wire and preparation and application thereof |
| FR2990636B1 (en) * | 2012-05-21 | 2015-03-20 | Air Liquide | THREAD WIRE FOR WELDING HIGH ELASTIC LIMIT STEELS |
| CN103659044B (en) * | 2012-09-12 | 2016-02-17 | 昆山京群焊材科技有限公司 | T-shaped CO 2gas shield high speed fillet welding series connection double-wire type combination welding wire |
| CN103659045B (en) * | 2012-09-12 | 2016-01-20 | 昆山京群焊材科技有限公司 | Carbon dioxide gas arc welding is with containing Ti type metal flux-cored wire |
| CN103659043B (en) * | 2012-09-12 | 2016-01-20 | 昆山京群焊材科技有限公司 | CO 2gas shield high speed flat fillet weld series connection double-wire type combination welding wire |
| CN103659052B (en) * | 2012-09-17 | 2016-02-17 | 昆山京群焊材科技有限公司 | Carbon dioxide gas arc welding is with containing Ti and Type B metal flux-cored wire |
| CN102873468B (en) * | 2012-09-18 | 2014-10-01 | 武汉铁锚焊接材料股份有限公司 | High-speed flat fillet weld flux-cored wire and preparation and application thereof |
| CN102896437A (en) * | 2012-10-16 | 2013-01-30 | 首钢总公司 | Flux-cored wire for surfacing repairing of high-manganese-steel cast steel frog and steel rail |
| CN102974956B (en) * | 2012-11-29 | 2014-11-05 | 武汉铁锚焊接材料股份有限公司 | Surfacing welding flux-cored wire |
| CN103042321B (en) * | 2012-12-21 | 2015-06-10 | 北方材料科学与工程研究院有限公司 | Metal powder-cored type nitrogen austenite stainless steel flux-cored wire |
| EP2952288B1 (en) | 2013-01-31 | 2018-09-05 | Nippon Steel & Sumitomo Metal Corporation | Flux cored wire, welding method using flux cored wire, method for producing welded joint using flux cored wire, and welded joint |
| US10421160B2 (en) * | 2013-03-11 | 2019-09-24 | The Esab Group, Inc. | Alloying composition for self-shielded FCAW wires with low diffusible hydrogen and high Charpy V-notch impact toughness |
| JP6040133B2 (en) * | 2013-10-03 | 2016-12-07 | 株式会社神戸製鋼所 | Gas shield arc welding method |
| CN103600179A (en) * | 2013-11-14 | 2014-02-26 | 北京航空航天大学 | Novel degasifier capable of reducing porosity of aluminum-alloy TIG (tungsten inert gas welding) |
| CN103962743B (en) * | 2014-04-30 | 2016-02-24 | 西安理工大学 | For welding wire that X100 pipe line steel full position welds and preparation method thereof |
| CN104117789B (en) * | 2014-08-06 | 2016-05-25 | 武汉铁锚焊接材料股份有限公司 | A kind of low-temperature steel flux-cored wire |
| CN104772577B (en) * | 2015-04-10 | 2017-09-05 | 河北京锐焊接材料有限公司 | One kind is used for hull, marine drilling platform ultralow temperature flux-cored wire |
| CN105057925B (en) * | 2015-07-30 | 2017-09-29 | 洛阳双瑞特种合金材料有限公司 | A kind of fillet welding metal powder core pattern seamless flux-cored wire |
| CN104999194B (en) * | 2015-08-13 | 2017-06-30 | 武汉铁锚焊接材料股份有限公司 | One kind is aluminized and stainless steel welded uses flux-cored wire |
| CN106041360A (en) * | 2016-07-27 | 2016-10-26 | 天津大桥金属焊丝有限公司 | Vertical position fillet welding small fillet titanium type high-toughness flux-cored wire and manufacturing method thereof |
| JP2018039026A (en) * | 2016-09-06 | 2018-03-15 | 株式会社神戸製鋼所 | Flux-cored wire for gas shield arc welding, and weld metal |
| CN106624449B (en) * | 2017-01-18 | 2020-01-10 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire for heat treatment of ocean engineering large and thick plates and preparation method and application thereof |
| CN107971653A (en) * | 2017-12-25 | 2018-05-01 | 昆山京群焊材科技有限公司 | One kind is without bismuth stainless flux-cored wire |
| CN108356440A (en) * | 2017-12-29 | 2018-08-03 | 安徽宝辰机电设备科技有限公司 | A method of improving tungsten electrode and low price steel alloy welding junction intensity |
| EP3778111A4 (en) * | 2018-03-29 | 2022-01-19 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Flux-cored wire |
| CN108436322B (en) * | 2018-06-15 | 2021-08-24 | 天津市金桥焊材集团股份有限公司 | High-strength high-toughness iron powder type flux-cored wire for bridge steel and application thereof |
| CN109530961B (en) * | 2018-11-21 | 2021-03-26 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire for high heat input welding and preparation method and application thereof |
| CN109530962B (en) * | 2018-11-21 | 2021-03-26 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire for high-current vertical upward welding and preparation method and application thereof |
| CN110421229A (en) * | 2019-07-12 | 2019-11-08 | 中船桂江造船有限公司 | A kind of EH36+CCSB ceramic substrate welding method |
| CN111195787A (en) * | 2020-03-14 | 2020-05-26 | 昆山京群焊材科技有限公司 | Alkaline flux-cored wire for pipeline ring welding and up-and-down automatic welding |
-
2007
- 2007-08-09 CN CNB2007100529227A patent/CN100515655C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804529A (en) * | 2010-04-06 | 2010-08-18 | 天津大桥焊材集团有限公司 | Flux-cored wire for 50kg all-position welding fire-resistant and weather-resistant steel |
| CN101804529B (en) * | 2010-04-06 | 2011-12-07 | 天津大桥焊材集团有限公司 | Flux-cored wire for 50kg all-position welding fire-resistant and weather-resistant steel |
| CN102328156A (en) * | 2011-08-26 | 2012-01-25 | 武汉铁锚焊接材料股份有限公司 | Reduced ilmenite type flux-cored wire |
| CN102328156B (en) * | 2011-08-26 | 2013-05-08 | 武汉铁锚焊接材料股份有限公司 | Reduced ilmenite type flux-cored wire |
| CN104874942A (en) * | 2015-06-01 | 2015-09-02 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire and application thereof to automatic trolley welding in vertical direction |
| EP3778112A4 (en) * | 2018-03-28 | 2021-10-27 | Nippon Steel Corporation | METHOD FOR PRODUCING A FILLED WIRE, FILLED WIRE AND METHOD FOR PRODUCING A WELDED JOINT |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101104232A (en) | 2008-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100515655C (en) | Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding | |
| CN100574964C (en) | A kind of chromium-molybdenum-seel flux welding wire for gas shielded arc welding | |
| JP4986562B2 (en) | Flux-cored wire for titania-based gas shielded arc welding | |
| JP5768547B2 (en) | High-strength steel flux cored wire for gas shielded arc welding | |
| JP2014113615A (en) | Flux-cored wire for carbon dioxide gas shielded arc welding | |
| CN100462182C (en) | Carbon steel cored solder wire for gas-shielded arc welding | |
| CN104959748A (en) | Flux-cored wire special for maritime work low-temperature high-strength steel | |
| JP2013151001A (en) | Flux-cored wire for gas-shielded arc welding for weather-resistant steel | |
| JP2015217393A (en) | Flux-cored wire for carbon dioxide gas shielded arc welding | |
| JP5400461B2 (en) | Flux cored wire | |
| CN102430877A (en) | Metal powder core type flux-cored wire and preparation and application thereof | |
| KR20100006546A (en) | Titania-based flux cored wire for gas shielded arc welding | |
| JP2016147273A (en) | FLUX-CORED WIRE FOR 9% Ni STEEL WELDING | |
| CN104148824A (en) | High-tenacity flux-cored wire for electro-gas welding | |
| JP5459083B2 (en) | Flux-cored wire for carbon dioxide shielded arc welding for high-tensile steel | |
| JP6453178B2 (en) | Flux-cored wire for gas shielded arc welding | |
| KR100265097B1 (en) | Flux-cored wire for arc welding | |
| JP6599807B2 (en) | Flux-cored wire for carbon dioxide shielded arc welding | |
| JP6084948B2 (en) | Flux-cored wire for gas shielded arc welding | |
| JP2019171473A (en) | Flux-cored wire | |
| JPH03294093A (en) | Flux cored wire electrode for gas shielded arc welding | |
| JP5351641B2 (en) | Flux cored wire | |
| CN114161024A (en) | Metal powder type flux-cored wire and preparation method and application thereof | |
| JP6599808B2 (en) | Flux-cored wire for electroslag welding of high strength steel | |
| CN110202291A (en) | 50 kg all-position welding weathering steel flux-cored wires of one kind and its application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20120809 |