CN103350289A - High-strength submerged arc welding wire deposited metal with excellent low-temperature toughness - Google Patents
High-strength submerged arc welding wire deposited metal with excellent low-temperature toughness Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 38
- 239000002184 metal Substances 0.000 title claims abstract description 38
- 238000003466 welding Methods 0.000 title claims abstract description 32
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 10
- 239000001257 hydrogen Substances 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052791 calcium Inorganic materials 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 10
- 229910000859 α-Fe Inorganic materials 0.000 description 9
- 238000005336 cracking Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 6
- 239000013078 crystal Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Inorganic materials [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000008186 active pharmaceutical agent Substances 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 230000008520 organization Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000035900 sweating Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910018068 Li 2 O Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
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- 230000002950 deficient Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a high-strength submerged arc welding wire deposited metal with excellent low-temperature toughness, which comprises the following chemical components in percentage by weight: 0.02-0.10% of C, 0.1-0.5% of Si, 1.5-3.0% of Mn, less than or equal to 0.006% of S, less than or equal to 0.012% of P, 0.1-1.0% of Ni0.1-0.5% of Cr0.1-0.5%, 0.2-0.8% of Mo0.1-0.5% of Cu0.1-0.5%, 0.01-0.1% of V, 0.01-0.1% of Nb0.005% of Ti, 0.001-0.01% of B, 0.002-0.005% of Ca0, and the balance of Fe and inevitable impurities. The deposited metal has excellent comprehensive performance, the tensile strength is more than or equal to 760MPa, the impact energy at 60 ℃ below zero is more than 100J, and the deposited metal has better Hydrogen Induced Crack resistance by controlling the contents of S and Ca and can adapt to the condition of containing H2And (4) service environment of S. The deposited metal is suitable for a welded joint of a high-strength-grade steel plate, has excellent low-temperature toughness, and is particularly suitable for the production of a high-grade welded pipe.
Description
Technical field
The present invention relates to a kind of welding wire for submerged-arc welding deposited metal, particularly relate to a kind of high-strength submerged-arc welding wire deposited metal of excellent in low temperature toughness, belong to field of welding material.
Background technology
At present, for improving the transfer efficiency of natural gas, reduce construction input and the operation cost of feed-line, the pipe line steel that rank is higher such as X90～X100 have progressively had its market demand, domestic each large steel looks forward to also having actively developed the research and development of this type of steel plate, and striving for trying to be the first comes into the market.The energetically research and development of high Grade Pipeline Steel certainly will need suitable welding material to be complementary with it, satisfying its high strength, and the performance of high tenacity, and in the transport gas process, H
2S produces hydrogen to the erosion of steel pipe, diffuses to steel inside and will cause hydrogen induced cracking (HIC), so the weld seam of steel pipe should have good anti-hydrogen induced cracking (HIC) ability equally with body.
ERW all adopts the method for submerged-arc welding that steel plate is made welded tube at present, multifibres welding, the characteristics that speed of welding is fast, the sweating heat input is high require to have special-purpose welding material to match, and this kind joint welding metal alloying ratio is up to about 70%, therefore can not only rely on component of weld wire to guarantee Weld Performance, and should set the composition of deposited metal, finally make weld seam satisfy performance requirement.
Summary of the invention
The object of the present invention is to provide a kind of high-strength submerged-arc welding wire deposited metal of excellent in low temperature toughness, this deposited metal high comprehensive performance, Pcm is 0.24～0.30, yield strength 〉=690MPa, tensile strength 〉=760MPa, impact flexibility＞100J of-60 ℃, and have good Properties of HIC resistance, satisfy API to the specification requirement of X100.
For achieving the above object, the present invention adopts following technical scheme:
A kind of high-strength submerged-arc welding wire deposited metal of excellent in low temperature toughness, by weight percentage, its chemical composition is: C0.02～0.10%, Si0.1～0.5%, Mn1.5～3.0%, S≤0.006%, P≤0.012%, Ni0.1～1.0%, Cr0.1～0.5%, Mo0.2～0.8%, Cu0.1～0.5%, V0.01～0.1%, Nb0.01～0.1%, Ti0.005～0.1%, B0.001～0.01%, Ca0.002～0.005%, surplus are Fe and inevitable impurity.The flux basicity of coupling is 1.5～3.5, adopts the method for multifibres high speed submerged-arc welding to make, and deposited metal Pcm is 0.24～0.30.
Deposited metal composition design principle of the present invention is as follows:
C is the key factor that guarantees weld strength, so C content should not be excessively low, but too high C content can worsen weldability, increases cold cracking inclination, among the present invention C content is controlled at 0.02～0.10%.
Mn is effective strength increase element and deoxidant element in weld seam, is conducive to the refinement seam organization.But too high Mn content can make welding seam toughness reduce, and increases the crack sensitivity of weld seam, so Mn content is 1.5～3.0%.
Si has stronger solution strengthening effect, can the Effective Raise weld strength, and play the effect of combined deoxidation with Mn.In addition, Si and Mn are same, and meeting butt welded seam toughness is unfavorable when too high levels, and can increase bead crack sensitiveness, so Si content is unsuitable too high, control Si content is 0.1～0.5%.
The toughness that is added in increase weld seam when not affecting weld strength and plasticity of Ni element, but too high Ni content can reduce the flowability of weld metal, it is unfavorable that butt welded seam is shaped, also easily cause the defectives such as weld seam slag inclusion and pore, and the Ni element of high-load can cause manufacturing cost significantly to rise, therefore, Ni content being set is 0.1～1.0%.
The adding of Cr element can improve the content of weld seam acicular ferrite, and to improve weld strength and low-temperature flexibility, Cr is conducive to improve the decay resistance of weld seam in addition.But too high Cr content can improve brittle transition temperature, and therefore, controlling its content is 0.1～0.5%.
The Mo element improves the intensity of weld seam by the precipitation strength effect, in the situation that the higher interpolation Mo element of sweating heat input more can embody this effect, but when Mo surpassed certain content, the bead crack tendency increased, and it is 0.2～0.8% that Mo content is set.
The solution strengthening effect of Cu can improve the intensity of weld seam, and in alloying element, the effect of Cu antagonism hydrogen induced cracking (HIC) is the most obvious, Cu can promote the formation of passivating film, reduce the intrusion of hydrogen, make weld metal have certain Properties of HIC resistance so add a certain amount of Cu, but too high levels can increase the red brittleness of weld seam, controlling its content is 0.1～0.5%.
The precipitation strength effect of V can suitably improve weld strength, but in weld seam the as-cast structure of refinement weld metal, and can prevent that heat affected area crystal grain from too growing up, improve toughness.Can add in right amount this element, but the too high crackle tendency that also can increase weld seam, controlling its content is 0.01～0.1%.
But Nb crystal grain thinning, improve the intensity of weld seam, be the generation that can promote ferrite side plate in the weld seam at C-Mn, worsen toughness, but containing Ti, in the weld seam of B, Nb can promote the generation of tiny uniform acicular ferrite, improve the toughness of weld seam, therefore can add in right amount this element, controlling its content is 0.01～0.1%.
Ti is strong deoxidier, denitrifier, and the adding of an amount of Ti can form the compound (TiO of tiny indissoluble and disperse distribution in weld seam
2, TiN) particle promotes acicular ferrite nucleating, the refinement seam organization effectively increase intensity and the toughness of weld seam, but too high Ti content can cause welding seam toughness to worsen, control Ti content 0.005～0.1%.
B solid solution B has reduced crystal boundary energy in the austenite grain boundary segregation, is conducive to suppress formation and the alligatoring of pro-eutectoid ferrite on the crystal boundary.In the situation that B and Ti add simultaneously, the strong deoxidation protection solid solution B of Ti is not oxidized in process of setting.In addition, B can help the refinement coarse grain zone microstructure to the coarse grain zone diffusion that closes on melt run in the larger welding process of heat input, improve the toughness of coarse grain zone.Controlling its content is 0.001～0.01%.
S, the low-temperature flexibility of P butt welded seam is unfavorable, should be controlled at zone of reasonableness as impurity element, in addition, the increase of S content can make the MnS that existence comes in every shape in a large number in the weld seam be mingled with, and this type of is mingled with is the principal element that increases the sensitiveness of material hydrogen induced cracking, strict control S content is at reduced levels, the MnS that can greatly reduce in the weld seam is mingled with, and makes the MnS form be tending towards spherical, thereby reduces the formation of weld seam hydrogen induced cracking.Segregation easily occurs in P at the weld seam center, this segregation also will promote the formation of hydrogen induced cracking, so P content also should obtain strict control.Among the present invention, control S≤0.006%, P≤0.012%.Simultaneously, weld metal should contain a certain amount of Ca by the alloy transition of solder flux, and the Ca element plays the effect that improves inclusion morphology in the metallurgical reaction in molten bath, and can fix S by forming CaS, suppress the formation of MnS, thereby reduce the formation of hydrogen induced cracking.The Ca constituent content is 0.002～0.005% in the control weld metal.
Among the present invention the basicity (Basicity Index) of coupling solder flux is made requirement, mainly be to control the weld seam oxygen content at zone of reasonableness because improve flux basicity, be conducive in weld metal, form tiny, intensive field trash, this type impurity is conducive to acicular ferrite nucleating, the acicular ferrite that makes weld seam have higher proportion, low-temperature flexibility and the intensity of butt welded seam are favourable.But too high flux basicity can make the weld metal viscosity improve, and reduces the flowability of weld metal and fusing solder flux, affects appearance of weld, also easily causes the weld defects such as slag inclusion and pore, and therefore the basicity scope of solder flux is set to 1.5～3.5.Wherein, flux basicity is calculated as follows:
In addition, have enough intensity for guaranteeing weld seam, the Pcm scope that requires the weld(ing) deposit is 0.24～0.30.Wherein, Pcm is calculated as follows:
Pcm=C+(Mn+Cr+Cu)/20+Si/30+V/10+Mo/15+Ni/60+5B
Compare with prior art, beneficial effect of the present invention is at least:
1, the present invention adopts the high Mn design of low C, adds an amount of Ni, Cr, Mo, V element guarantees that the deposited metal performance satisfies the requirement of API X100, and adding simultaneously trace Ti, the B element makes its deposited metal under the more much higher silk of heat input high-speed welding condition have better low-temperature flexibility.In addition,, avoid producing a large amount of MnS and be mingled with at reduced levels by restriction welding wire S content, and add the Properties of HIC resistance that the addition of C u element has improved weld metal.
2, deposited metal of the present invention is by adopting suitable welding wire, solder flux collocation, and the Pcm scope 0.24～0.30 of the deposited metal of acquisition has good combination property, yield strength 〉=690MPa, and tensile strength 〉=760MPa ,-60 ℃ of low-temperature flexibilities are more than 100J.Seam organization mainly is comprised of acicular ferrite, and its content accounts for more than 80%, and size is less than 2 μ m.
The specific embodiment
Below in conjunction with preferred embodiment technical scheme of the present invention is further described.
Adopt the welding wire in the table 1, and the solder flux of the different basicity of arranging in pairs or groups, the test steel plate adopts the thick API X100 of domestic 16.3mm Pipeline Steel Plate, and its chemical composition sees Table 2, adopts two-sided welding, each weldering one, welding parameter sees Table 3.The weld(ing) deposit of embodiment is comprised of the martensite-retained austenite (M-A) of the tiny acicular ferrite more than 80% and a small amount of island, and deposited metal composition and performance see Table 4～5.
Above embodiment welding point is carried out anti-HIC test, and test is carried out with reference to NACE TM0284, adopts to contain saturated H
2Sodium chloride acetum (the 5%NaCl+0.5%CH of S
3The saturated H of COOH+
2The S distilled water solution), test period is 96 hours.According to standard, the ability of the anti-HIC of material is by crack-sensitivity rate (CSR), and crack length rate (CLR) and three crackle indexs of crack thickness rate (CTR) characterize.The CSR of material, CLR and CTR mean value are more close to zero, and then the anti-HIC ability of material is just stronger.Result of the test sees Table 6, and result of the test shows that the Properties of HIC resistance of embodiment deposited metal is strong.
Table 1 component of weld wire (P unit is ppm for percentage by weight, S wherein)
The chemical composition of table 2 mother metal X100 Pipeline Steel Plate (percetage by weight ratio)
| ? | C | Si | Mn | Ni+Cr+Mo | Ti | Other | Pcm |
| X100 | 0.05 | 0.20 | 2.12 | 1.04 | 0.014 | ≤0.5 | 0.22 |
Table 3 welding condition
Technique (a) Double Wire Welding parameter
Technique (b) four wire bond parameters
Table 4 deposited metal composition (the percetage by weight ratio, S wherein, P, B, Ca, O, N unit is ppm)
Table 5 deposited metal and property of welded joint
The anti-HIC result of the test of table 6 welding point
| Sequence number | a | b | c | d | e |
| CSR(%) | 0 | 0 | 0 | 0 | 0 |
| CLR(%) | 0 | 0 | 0 | 0 | 0 |
| CTR(%) | 0 | 0 | 0 | 0 | 0 |
Claims (3)
1. the high-strength submerged-arc welding wire deposited metal of an excellent in low temperature toughness, it is characterized in that: by weight percentage, its chemical composition is: C0.02～0.10%, Si0.1～0.5%, Mn1.5～3.0%, S≤0.006%, P≤0.012%, Ni0.1～1.0%, Cr0.1～0.5%, Mo0.2～0.8%, Cu0.1～0.5%, V0.01～0.1%, Nb0.01～0.1%, Ti0.005～0.1%, B0.001～0.01%, Ca0.002～0.005%, surplus are Fe and inevitable impurity.
2. the high-strength submerged-arc welding wire deposited metal of a kind of excellent in low temperature toughness according to claim 1, it is characterized in that: deposited metal Pcm is 0.24～0.30,
Pcm=C+ (Mn+Cr+Cu)/20+Si/30+V/10+Mo/15+Ni/60+5B wherein.
3. the high-strength submerged-arc welding wire deposited metal of a kind of excellent in low temperature toughness according to claim 1 is characterized in that: deposited metal yield strength 〉=690MPa, tensile strength 〉=760MPa ,-60 ℃ of low-temperature flexibility＞100J.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942467A (en) * | 2015-06-19 | 2015-09-30 | 贵州航天凯宏科技有限责任公司 | Submerged arc welding wire and preparation method thereof |
| WO2015188427A1 (en) * | 2014-06-11 | 2015-12-17 | 江苏省沙钢钢铁研究院有限公司 | Submerged arc welding wire and welding method |
| CN105817788A (en) * | 2015-01-06 | 2016-08-03 | 海宁瑞奥金属科技有限公司 | High-efficient submerged welding method for low-temperature steel |
| CN107813071A (en) * | 2016-09-12 | 2018-03-20 | 海宁瑞奥金属科技有限公司 | A kind of big wall thickness cryogenic pipelines pipe fitting welding wire for submerged-arc welding of high intensity |
| CN113319429A (en) * | 2021-04-29 | 2021-08-31 | 中国石油天然气集团有限公司 | Wire material for low-temperature additive manufacturing and controlling grain size, and preparation and application thereof |
| CN113684417A (en) * | 2021-07-19 | 2021-11-23 | 中国科学院金属研究所 | Economical 690 MPa-level low-alloy corrosion-resistant refractory steel |
| CN116252067A (en) * | 2023-01-06 | 2023-06-13 | 燕山大学 | 500MPa multi-wire submerged arc welding wire rod capable of being welded at 50-150 kjcm in heat input mode and welding wire |
| CN116586823A (en) * | 2023-07-17 | 2023-08-15 | 成都先进金属材料产业技术研究院股份有限公司 | Welding wire molten steel and welding wire for welding medium-pressure hydrogen transmission pipeline and preparation method thereof |
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| CN113319429A (en) * | 2021-04-29 | 2021-08-31 | 中国石油天然气集团有限公司 | Wire material for low-temperature additive manufacturing and controlling grain size, and preparation and application thereof |
| CN113319429B (en) * | 2021-04-29 | 2023-02-21 | 中国石油天然气集团有限公司 | Wire material for low-temperature additive manufacturing and controlling grain size, and preparation and application thereof |
| CN113684417A (en) * | 2021-07-19 | 2021-11-23 | 中国科学院金属研究所 | Economical 690 MPa-level low-alloy corrosion-resistant refractory steel |
| CN116252067A (en) * | 2023-01-06 | 2023-06-13 | 燕山大学 | 500MPa multi-wire submerged arc welding wire rod capable of being welded at 50-150 kjcm in heat input mode and welding wire |
| CN116586823A (en) * | 2023-07-17 | 2023-08-15 | 成都先进金属材料产业技术研究院股份有限公司 | Welding wire molten steel and welding wire for welding medium-pressure hydrogen transmission pipeline and preparation method thereof |
| CN116586823B (en) * | 2023-07-17 | 2023-10-13 | 成都先进金属材料产业技术研究院股份有限公司 | Welding wire molten steel and welding wire for welding medium-pressure hydrogen transmission pipeline and preparation method thereof |
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Application publication date: 20131016 |