CN108705223A - A kind of tensile strength is 810MPa grades of high-ductility corrosion Lincoln weld welding wires - Google Patents
A kind of tensile strength is 810MPa grades of high-ductility corrosion Lincoln weld welding wires Download PDFInfo
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- CN108705223A CN108705223A CN201810467192.5A CN201810467192A CN108705223A CN 108705223 A CN108705223 A CN 108705223A CN 201810467192 A CN201810467192 A CN 201810467192A CN 108705223 A CN108705223 A CN 108705223A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3066—Fe as the principal constituent with Ni as next major constituent
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Abstract
A kind of tensile strength is 810MPa grades of high-ductility corrosion Lincoln weld welding wires, and chemical composition and weight percent content are：C：0.06~0.10%, Si：0.01~0.05%, Mn：1.70~2.0%, S≤0.005%, P≤0.010%, Ni：2.61~2.90%, Cr：0.35~0.60%, Cu：0.25~0.40%, Mo：0.39 ~ 0.60%, Ti：0.06~0.12%, B：0.002~0.006%, N≤0.005%.Production method.Weld(ing) deposit tensile strength >=810MPa of the present invention, -40 DEG C of weld impingement work(are in 111 ~ 120J, -50 DEG C of weld impingement work(are in 83 ~ 106J, -60 DEG C of weld impingement work(are reached in 71 ~ 91J, weld seam corrosion resistance index >=6, elongation percentage A >=18%, contraction percentage of area Z >=60% meet from now in the fields such as railway speed increase loss of weight, bridge spanning the sea, marine ship, oil pipeline, engineering machinery needs.
Description
Technical field
The present invention relates to a kind of submerged-arc welding wires, and it is that 810MPa grades of high-ductility corrosion submerged arcs are automatic definitely to belong to tensile strength
Welding wire.
Background technology
With the high speed development of Chinese national economy, Railway Transport Industry has been enter into the high-speed developing period.In recent years, railway
Circuit has successively carried out six raising speed by a large scales, has preliminarily formed the acceleration network of " four vertical two is horizontal ".Further to meet China
The new steel grades key project welding material such as railway speed increase loss of weight and bridge spanning the sea, ocean naval vessel, oil pipeline, engineering machinery is matched
Set demand will generally use the steel for welded structures of new generation of high-weatherability, high intensity, high tenacity.And in these steel containing Cu,
The microalloy elements such as Cr, Ni, Ti, RE, Mn, to improve the atmospheric corrosion resistance of steel grade.And this weather-proof steel grade of a new generation
Tensile strength is more than 810 MPa.More stringent requirements are proposed for the performance of this Welded Joints, i.e. welding point must have and base
The comparable obdurability of material and weather resistance.
In existing welding wire national standard, there is no weathering steel welding wire for submerged-arc welding.The skill of former portion of Ministry of Railways mark TB/T2374-1999
It is 440 ~ 600 MPa that art, which requires welding wire for submerged-arc welding intensity rank, far from need sufficient railway speed increase loss of weight, bridge spanning the sea, marine ship,
The high-level mating demand of new steel grade key project welding material such as oil pipeline, engineering machinery.It is strong with high-level new steel grade
The continuous improvement of degree, toughness and weather resistance, welding seam toughness, the weatherability gap compared with base material are larger, high-strength weather-proof system
The a large amount of imports every year of row welding material, cannot be satisfied domestic key project demand.Such as through retrieval：
Chinese Patent Application No. be CN00114334.4 document, alloy system Ni-Mo-Ti, ingredient for (wt%) C0.05 ~
0.10, Mn1.60 ~ 2.10, Si≤0.10, Ni0.30 ~ 0.50, Mo0.20 ~ 0-0.50, Ti0.08 ~ 0.15, weld seam tensile strength
In 600-700MPa, mainly for the manufacture of the low alloy steel welding wire of pressure vessel.Obviously, weld strength is not up to 810MPa
Grade, and this welding wire is not directed to corrosion resistance.
Chinese Patent Application No. is the document of CN201510451056.3, it discloses a kind of high corrosion resistant type welding wire for submerged-arc welding and
Weld metal, welding wire chemical composition (wt%) are：C 0.02-0.07, Si 0.10-0.25, Mn 1.50-2.00, P≤0.020, S
≤ 0.010, Ni 1.0-2.7, Cu 0.50-1.20, Ti 0.04-0.10.Welding wire is matched with SG101 sintered fluxes, weld metal
With corrosion resistance, weld metal is 0.98 with respect to the weight-loss ratio of base material in week leaching corrosion test.Tensile strength >=700MPa, -40
DEG C impact flexibility >=80J.The welding wire is mainly used for the industries corrosion resistance steel such as 700MPa grades of bridges, building, rail trucks
Welding.But its intensity is not achieved 810MPa grades, therefore, exploitation a new generation 810MPa grade high-strengths, high tenacity, high-weatherability submerged arc
Automatic welding wire become there is an urgent need to.
Invention content
The invention reside in the shortcomings of the prior art is overcome, a kind of tensile strength is provided up to >=810MPa, -40 DEG C of welderings
Ballistic work is stitched in 111 ~ 120J, -50 DEG C of weld impingement work(are reached in 83 ~ 106J, -60 DEG C of weld impingement work(in 71 ~ 91J, and weld seam is resistance to
The satisfaction of corrosion index >=6 is from now in fields such as railway speed increase loss of weight, bridge spanning the sea, marine ship, oil pipeline, engineering machinery
The high-ductility corrosion Lincoln weld welding wire of strategic demand.
Realize the measure of above-mentioned purpose：
A kind of tensile strength is 810MPa grades of high-ductility corrosion Lincoln weld welding wires, and chemical composition and weight percent contain
Amount is：C：0.06~0.10%, Si：0.01~0.05%, Mn：1.70~2.0%, S≤0.005%, P≤0.010%, Ni：2.61~
2.90%, Cr：0.35~0.60%, Cu：0.25~0.40%, Mo：0.39 ~ 0.60%, Ti：0.06~0.12%, B：0.002~
0.006%, N≤0.005%, surplus are Fe and other are inevitably mingled with；Weld Performance：Tensile strength reaches >=810MPa ,-
40 DEG C of weld impingement work(are reached in 83 ~ 106J, -60 DEG C of weld impingement work(in 71 ~ 91J in 111 ~ 129J, -50 DEG C of weld impingement work(,
Weld seam corrosion resistance index >=6.
Preferably：Following chemical composition and weight percent content are：Ni：2.72~2.87%, Cr：0.35~0.45%,
Mo：0.42 ~ 0.56%, Ti：0.0105~0.12%, B：0.002~0.0045.
Further preferably：Following chemical composition and weight percent content are：Ni：2.75~2.83%, Cr：0.38~
0.42%, Mo：0.42 ~ 0.52%, Ti：0.07~0.10%, B：0.0023~0.0042.
It is：It is alkalescent sintered flux, alkali to match the solder flux used when being welded with the welding wire of affiliated ingredient
Property sintered flux basicity factor be 3.0.
It should be noted that：The preparation process of the present invention is only with conventional existing technology of preparing, only in converter smelting
When according to clean steel require smelt.
The effect of each element and mechanism in the present invention：
The control of C weight percent is 0.06 ~ 0.10 in welding wire of the present invention, obdurability and its tissue group of the C element content to weld seam
At there is large effect.When C content is relatively low, weld strength is relatively low, and ratio of ferrite is higher in weld metal.When C content compared with
Gao Shi, welding seam toughness decline, and weld seam medium pearlite ratio increases.Therefore, C content it is too high or too low can influence it is needle-shaped in weld seam
Ferrite content.
Low Si, weight percent control is used to weld rear substrate in 0.01 ~ 0.05 range, purpose in welding wire of the present invention
In Si section transitions to weld seam, si content should be controlled 0.3% hereinafter, ensureing that connector has excellent low-temperature impact in weld seam
Toughness.
For the control of Mn weight percent in 1.70 ~ 2.0 ranges, Mn is the effective element of weld seam Strengthening and Toughening in welding wire of the present invention,
Be conducive to deoxidation in weld seam, prevent the formation for causing fire check and iron sulfide.When in weld seam Mn weight percent 1.20 ~
When 1.60, weld seam obdurability reaches best matching.
The control of Ni weight percent is in 2.61 ~ 2.90 ranges in welding wire of the present invention, and preferably Ni is 2.72~2.87%；Into
One step preferably Ni：2.75~2.83%.It is conducive to the toughness especially low-temperature impact toughness for improving weld metal, reduces crisp
Sex reversal temperature.Improve weld corrosion resistance energy simultaneously.If but its content is less than 2.61%, weld metal toughness can be influenced, if being higher than
2.90% can be such that weld seam excessively strengthens, and cost increases.
The control of Cr weight percent is 0.35 ~ 0.60 in welding wire of the present invention, and preferably Cr is 0.35~0.45%, further
Preferably Cr is 0.38~0.42%.Be conducive to acicular ferrite content in raising weld seam containing certain Cr elements in weld seam, reduce
Pro-eutectoid ferrite, and play the role of fining ferrite grains, weld seam obdurability is improved, while improving weld corrosion resistance energy, Cr
It additionally aids performance after keeping weld seam heat treatment and maintains higher level.If but its content is less than 0.35%, can make weld strength
Deficiency, if welding seam toughness can be made to be decreased obviously higher than 0.60%.
When Cu weight percent controls content less than 0.25, weld strength is improved in a manner of solution strengthening, and reduce needle-shaped
Ferrite initial transition temperature improves acicular ferrite content；When Cu weight percent control content is more than 0.4, to be precipitated
Mode strengthens weld seam, but unfavorable to welding seam toughness.Therefore the present invention controls Cu weight percent in welding wire 0.25~0.40
Range.
The control of Mo weight percent is in 0.39 ~ 0.60 range, and preferably Mo is 0.42 ~ 0.56%, further preferably Mo
0.42 ~ 0.53%.Weld seam obdurability is improved containing certain Mo elements in weld seam, while improving weld corrosion resistance energy, is conducive to carry
Acicular ferrite content in high weld seam, and play the role of fining ferrite grains, Mo additionally aids property after holding weld seam heat treatment
Higher level can be maintained.But if its content is less than 0.39%, and weld strength can be made insufficient, if weld seam can be made tough higher than 0.60%
Property is decreased obviously.
Ti is added in welding wire of the present invention can be with thinning weld metal structure.There is Ti and N high affinity, Ti and N to tie
Synthesis TiN particles promote the formation of acicular ferrite in weld seam as nucleus.The control of Ti weight percent exists in weld metal
0.01 ~ 0.04, it is contemplated that certain transfer coefficient, therefore, the control of Ti weight percent in welding wire of the present invention can be improved for
0.06 ~ 0.12%, preferably Ti is 0.0105~0.12%.
The control of B weight percent is in 0.002 ~ 0.006 range in welding wire of the present invention, preferably B 0.002~0.0045%,
Further preferably B is 0.0023~0.0042%.The B of solid solution assembles in austenite grain boundary reduces crystal boundary energy, can control first altogether
Ferritic precipitation is analysed, B can also postpone austenite → ferritic phase transition temperature, be conducive to the shape of acicular ferrite in crystal grain
At.But if its content is less than 0.002%, and effect is difficult to show because content is too small, if being higher than 0.006%, weld seam can be made brittle.
S, P element is the main harmful element in weld seam, they significantly reduce weld metal low-temperature impact toughness.S is weldering
Inevitable element in silk, when welding wire steel smelting, should strictly control, and reduce S, P content as far as possible.Welding wire of the present invention due to
With low S, P content, alkalescent sintered flux that basicity factor R is 3.0 is used cooperatively, therefore can make S in weld seam, P content control
System is in reduced levels.
Due to high-strength, high-ductility of new generation, high durable bridge steel welded joint more demanding intensity and low-temperature impact toughness
Outside, weld seam should have excellent atmospheric corrosion resistance.The present invention combines the needs of this strategic sexual development.Pass through in welding wire
C, Mn, Ni, Mo ensure the enough intensity of weld seam, improve the toughness of weld seam；Using suitable Cu, Cr, Ni alloying element to weld seam
Have outside invigoration effect, increases the atmospheric corrosion resistance of weld seam.Suitable Ti, B are conducive to inhibit austenite crystal grain length in weld seam
Greatly, austenite is postponed to ferritic transition temperature, is promoted the formation of weld metal intragranular acicular ferrite, is refined two para-crystals
Grain.Ultralow S, low P, low N content improve weld seam degree of purity and comprehensive mechanical property.
Compared with prior art, the present invention its weld(ing) deposit tensile strength >=810MPa, -40 DEG C of weld impingement work(
In 111 ~ 120J, -50 DEG C of weld impingement work(are reached in 83 ~ 106J, -60 DEG C of weld impingement work(in 71 ~ 91J, weld seam corrosion resistance index
>=6, elongation percentage A >=18%, contraction percentage of area Z >=60% meets from now in railway speed increase loss of weight, bridge spanning the sea, marine ship, stone
The fields strategic demand such as oil pipeline, engineering machinery.
Specific implementation mode
The present invention is described in detail below：
Various embodiments of the present invention are produced according to conventional steps：It is smelted using 50kg vacuum drying ovens, electromagnetic agitation and vacuum-energy
Improve the uniformity and degree of purity of steel ingot.It is added when Ni, Mo, Cu and Cr dispensing, active trace element is in the later stage or in ladle
Middle addition.Stringent control trace element and gas content, casting ingot-forming.Smelting process process stabilizing, ingredient is all in design model
It encloses.Steel is determined to forge into square billet, rerolls that wire rod is made and draws and dials into welding wire, gage of wire 4mm, copper coating.
It matches the sintered flux TG-SJ690NHQ that basicity factor is 3 and carries out deposited metal soldering test, welding current is
500 ~ 550A, weldingvoltage are 31 ~ 30V, speed of welding 38cm/min.Interlayer temperature≤120 DEG C.Solder flux baking regime is
(350 ~ 400) DEG C+(1 ~ 1.5) hour.
Table 1 is the chemical composition list of various embodiments of the present invention and comparative example；
Table 2 is the welding deposited metal composition list of various embodiments of the present invention and comparative example；
Table 3 is the welding deposited metal main performance list of various embodiments of the present invention and comparative example.
The chemical composition of 1 various embodiments of the present invention of table and comparative example（wt.%）
The welding deposited metal composition (wt%) of 2 various embodiments of the present invention of table and comparative example
The welding deposited metal performance test results of 3 various embodiments of the present invention of table and comparative example
Explanation：I is anti-corrosion index in table, is calculated according to following common calculation formula：
I=26.01(%Cu)+3.88(%Ni)+1.20(%Cr)+1.49(%Si)+17.28(%P)-7.29(%Cu)(%Ni)-9.10
(%Ni)(%P)-33.39(%Cu)2
It is included in 8 embodiments and a comparative example altogether.6 embodiment chemical compositions are all qualified, such as table 1.Table 2 is welding deposition
Metallochemistry ingredient, compared to the welding wire chemical composition in table 1, C, Si, Mn and Ti variation of compare Huo Fa is more apparent, without work
Fa element Ni, Mo, Cr content then change less.Deposited metal：833 ~ 872MPa of tensile strength, -40 DEG C of weld impingement work(exist
111 ~ 129J, -50 DEG C of weld impingement work(are reached in 83 ~ 106J, -60 DEG C of weld impingement work(in 71 ~ 91J, weld seam corrosion resistance index 9.2
~10.2。
As it can be seen that the present patent application welding deposited metal meet tensile strength >=810MPa, anti-corrosion index >=6 and with compared with
High toughness.And comparative example Cu contents are seldom, Si contents are higher, and Ti, B are free of, welding deposited metal tensile strength is not up to
To 810MPa, and toughness is relatively low.
Present embodiment is only the best example, not to the restricted implementation of technical solution of the present invention.
Claims (4)
1. a kind of tensile strength is 810MPa grades of high-ductility corrosion Lincoln weld welding wires, chemical composition and weight percent
Content is：C：0.06~0.10%, Si：0.01~0.05%, Mn：1.70~2.0%, S≤0.005%, P≤0.010%, Ni：2.61
~2.90%, Cr：0.35~0.60%, Cu：0.25~0.40%, Mo：0.39 ~ 0.60%, Ti：0.06~0.12%, B：0.002~
0.006%, N≤0.005%, surplus are Fe and other are inevitably mingled with；Weld Performance：Tensile strength reaches >=810MPa ,-
40 DEG C of weld impingement work(are reached in 83 ~ 106J, -60 DEG C of weld impingement work(in 71 ~ 91J in 111 ~ 129J, -50 DEG C of weld impingement work(,
Weld seam corrosion resistance index >=6.
2. a kind of tensile strength as described in claim 1 is 810MPa grades of high-ductility corrosion Lincoln weld welding wires, special
Sign is：Following chemical composition and weight percent content are：Ni：2.72~2.87%, Cr：0.35~0.45%, Mo：0.42~
0.56%, Ti：0.0105~0.12%, B：0.002~0.0045.
3. a kind of tensile strength as claimed in claim 1 or 2 is 810MPa grades of high-ductility corrosion Lincoln weld welding wires,
It is characterized in that：Following chemical composition and weight percent content are：Ni：2.75~2.83%, Cr：0.38~0.42%, Mo：0.42
~ 0.52%, Ti：0.07~0.10%, B：0.0023~0.0042.
It is welded 4. a kind of tensile strength as described in claims 1 or 2 or 3 is 810MPa grades of high-ductility corrosion Lincoln welds
Silk, it is characterised in that：It is alkalescent sintered flux, alkalinity to match the solder flux used when being welded with the welding wire of affiliated ingredient
The basicity factor of sintered flux is 3.0.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810467192.5A CN108705223A (en) | 2018-05-16 | 2018-05-16 | A kind of tensile strength is 810MPa grades of high-ductility corrosion Lincoln weld welding wires |
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| CN201810467192.5A CN108705223A (en) | 2018-05-16 | 2018-05-16 | A kind of tensile strength is 810MPa grades of high-ductility corrosion Lincoln weld welding wires |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114227061A (en) * | 2021-12-02 | 2022-03-25 | 中车长江运输设备集团有限公司 | High-toughness gas-shielded solid welding wire suitable for large-specification welding and application thereof |
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| CN114227061A (en) * | 2021-12-02 | 2022-03-25 | 中车长江运输设备集团有限公司 | High-toughness gas-shielded solid welding wire suitable for large-specification welding and application thereof |
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Application publication date: 20181026 |