CN104476008A - Welding wire for high-heat-input submerged-arc welding - Google Patents
Welding wire for high-heat-input submerged-arc welding Download PDFInfo
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- CN104476008A CN104476008A CN201410728048.4A CN201410728048A CN104476008A CN 104476008 A CN104476008 A CN 104476008A CN 201410728048 A CN201410728048 A CN 201410728048A CN 104476008 A CN104476008 A CN 104476008A
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- welding wire
- arc welding
- high heat
- input
- submerged
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a welding wire for high-heat-input submerged-arc welding. The welding wire is chemically made of, by weight, 0.01-0.08% of C, 0.1-0.8% of Si, 1.0-2.0% of Mn, 0.1-1.0% of Ni, 0.1-1.0% of Mo, 0.01-0.05% of Al, 0.01-0.05% of Ti, Mg, Ce, P, S, and the rest Fe and impurities, wherein weight percentage of Mg is smaller than or equal to 0.005%, weight percentage of Ce is smaller than or equal to 0.001%, weight percentage of P is smaller than or equal to 0.015%, and weight percentage of S is smaller than or equal to 0.01%. The welding wire is matched with alkaline sintered flux GM55, heat input is in a range of 60kJ/cm-160kJ/cm, weld metal is excellent in low-temperature performance, impact absorbing energy Akv of the weld metal at the temperature of -20 DEG C is 94-159J, and impact absorbing energy Akv of the weld metal at the temperature of -40 DEG C is 48-118J. The welding wire can be used for high-heat-input welding of ship plate steel in level A/D/E36 and level A/D/E40 and further used for high-heat-input welding of low-alloy high-strength steel in strength grade higher than 400MPa.
Description
Technical field
The invention belongs to material processing field, particularly relate to a kind of high heat-input submerged-arc welding wire.
Background technology
Along with shipbuilding industry develops to large ship, new requirement is proposed to the obdurability of steel.Meanwhile, for reducing manufacturing cost, improving thick plates efficiency and becoming development trend.Therefore, the R and D of high heat-input welding high-strength steel and relevant supporting welding material are significant.
Chinese invention patent application 200810020096.2 discloses one ' austenitic stainless steel buried arc welding wire for low-temperature equipment ', this welding wire meets the solder technology requirement of high strength, high tenacity and corrosion-resistant steel series under low-temperature equipment and cryogenic conditions, but can not be used for high heat-input welding.Chinese invention patent application 200410073353.0 discloses one ' solder wire material of submerged-arc welding for high grade pipeline steel ', this welding wire mates with SJ101G solder flux and can be used for X80 level pipe line steel, hot input range is suitable for about 30 ~ 48kJ, welds certain gap in addition with high heat-input.Chinese invention patent application 200510018993.6 discloses one ' submerged-arc welding wire for high-strength pipeline steel ', is applicable to the submerged arc welding at the low steel alloy of 620-740MPa intensity rank of X80 high-strength line-pipe steel and other tensile strength.Chinese invention patent application 201010605985.2 discloses ' a kind of ultra high-strength pipeline steel submerged-arc welding wire and preparation method thereof ', and this silk mates with SJ105 solder flux and welds, and is applicable to X120 ultra high-strength pipeline steel.Chinese invention patent application 201310178969.3 discloses ' a kind of austenitic stainless steel buried arc welding wire of having excellent high-temperature strength ', and this mainly may be used for the welding of critical component in presurized water reactor nuclear island.This application mainly pays close attention to the elevated temperature strength of joint, and the hot input range that not mentioned welding wire is suitable for.Chinese invention patent application 201310110436.1 discloses ' a kind of high-strength and high-toughness submerged-arc welding welding wire of cupric and welding procedure thereof ', applied heat is input as 15 ~ 18kJ/cm, is applicable to the large-sized structural parts such as pressure vessels for the chemical industry, petroleum pipeline, electric pressure hydraulic piping, boats and ships, ocean platform and heavy aircraft carrier.
At present, domestic the welding that heat input is greater than 50kJ/cm is called that high heat-input welds.The submerged-arc welding wire that above patented technology is invented, the input of its applied heat is all no more than 50kJ/cm, and above-mentioned welding wire is not all suitable for high heat-input welding.
Summary of the invention
The object of the invention is to make up prior art deficiency, a kind of high heat-input submerged-arc welding wire is provided.This welding wire applied heat input range is 60 ~ 160kJ/cm, mates with alkalescent sintered flux GM55, is mainly used in the welding of A/D/E36 rank and A/D/E40 class boat slab.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of high heat-input submerged-arc welding wire, the chemical composition of described submerged-arc welding wire is by mass percentage: C 0.01 ~ 0.08, Si 0.1 ~ 0.8, Mn 1.0 ~ 2.0, Ni 0.1 ~ 1.0, Mo 0.1 ~ 1.0, Al 0.01 ~ 0.05, Ti 0.01 ~ 0.05, Mg≤0.005, Ce≤0.001, P≤0.015, S≤0.01, surplus is Fe and impurity.
The hot input range that described submerged-arc welding wire is suitable for is 60 ~ 160kJ/cm.
The weld seam that described welding wire obtains, microstructure is in a state of use TiN particle bainite structure and acicular ferrite matrix with disperse, and the composite oxides of Si, Mn, Ti, Al, Ce and Mg etc. are mingled with, and sulphide inculsion.
The weld seam that described welding wire obtains, microstructure in a state of use has silicon further, oxygen combines the silicate and compound thereof that are formed, as the nucleating agent of acicular ferrite.
The weld seam that this welding wire obtains, microstructure in a state of use has manganese sulfide further.
Described welding wire is applicable to the low-alloy high-strength steel high heat-input submerged arc welding of tensile strength rank at more than 400MPa.
Described welding wire is applicable to the high heat-input submerged arc welding of A/D/E36 rank and A/D/E40 class boat slab.
Mate with alkalescent sintered flux GM55.
The weld seam that described welding wire obtains, there is following mechanical property: tensile strength 570-650Rm/MPa, yield strength 450-553Rp0.2/MPa, contraction percentage of area Z/%61-75, percentage elongation A/%22-28,-20 DEG C of impact absorbing energy 94-159J Akv-20 DEG C/J ,-40 DEG C of impact absorbing energy 48-118J Akv-40 DEG C/J.
Beneficial effect of the present invention is:
1) welding wire applied heat input range of the present invention is 60 ~ 160kJ/cm, weld metal has good low-temperature flexibility, welding wire of the present invention is not only applicable to the high heat-input submerged arc welding of A/D/E36 rank and A/D/E40 class boat slab, is equally applicable to the low-alloy high-strength steel high heat-input submerged arc welding of intensity rank at more than 400MPa.
2) welding wire of the present invention has excellent welding technological properties.
Detailed description of the invention
Below in conjunction with embodiment, the specific embodiment of the present invention is described in further detail.
High heat-input submerged-arc welding wire of the present invention, its chemical composition is by mass percentage: C0.01 ~ 0.08, Si 0.1 ~ 0.8, Mn 1.0 ~ 2.0, Ni 0.1 ~ 1.0, Mo 0.1 ~ 1.0, Al 0.01 ~ 0.05, Ti 0.01 ~ 0.05, Mg≤0.005, Ce≤0.001, P≤0.015, S≤0.01, surplus is Fe and impurity.
Technical scheme of the present invention uses microalloying principle and Oxide Metallurgy principle.On the one hand form TiN and carry out pinning austenite grain boundary by adding Ti and stop austenite to be grown up, promote that the composite oxides producing high-melting-point Si, Mn, Ti, Al, Ce and Mg etc. are mingled with by adding the alloying elements such as Si, Mn, Ti, Al, Ce, Mg on the other hand, promote the generation of acicular ferrite, and then ensure the toughness of weld seam under high heat-input.
C: in order to ensure the intensity of welding wire, a certain amount of carbon must be added, but carbon content is higher will have a negative impact to toughness and decay resistance, therefore this welding wire carbon content scope selects 0.01 ~ 0.08%.
Si: the impact of silicon butt welded seam structure and properties, mainly by embodying with the effect of oxygen in weld metal.Silicon, oxygen in conjunction with formation silicate and compound thereof, can become the nucleating agent of acicular ferrite (AF).When manganese, silicon exist simultaneously, silicon is deoxidier, along with the increase of manganese, silicone content, can make that the phase transition temperature of continuous coo1ing reduces gradually, thinning microstructure, thus affect weld structure performance.Silicone content of the present invention selects 0.1 ~ 0.8%.
Mn: manganese can make the iron sulfide of low melting point change dystectic manganese sulfide into, reduces the generation of fire check in weld seam.In weld seam, the mechanical property of the content Resistance of Weld Metal of manganese has a great impact: along with the increase of Fe content, and yield strength and the hot strength of weld metal linearly increase, and when Fe content reaches 1.5%, weld seam can obtain best notch impact toughness.Therefore, Fe content selects 1.0 ~ 2.0%.
Ni: nickel is austenite former, can improve the low-temperature flexibility of weld metal.In order to ensure that weld metal has certain plasticity and toughness, should add appropriate nickel, nickel content of the present invention selects 0.1 ~ 1.0%.
Mo: molybdenum is the essential element of solution strengthening, has stronger strengthening effect.In addition, molybdenum is grain refining element, can improve quenching degree and heat resistance.Molybdenum can effectively reduce Bs temperature, thus obtains bainite structure completely within the scope of wider cooling velocity, even if when high heat-input welds, the tissue of heat affected area remains unchanged and obtains good toughness.Consider the impact of molybdenum Resistance of Weld Metal performance, its content selects 0.1 ~ 1.0%.
Al: aluminium is Strong oxdiative thing forming element, have very strong deoxidation and the effect of crystal grain thinning, therefore in welding process, aluminium can reduce the scaling loss of other alloying elements.The impact of aluminium butt welded seam tissue is very complicated.Aluminium easily makes AF forming core on the suitable field trash of original austenite intracrystalline grow up.Non-metallic inclusion MnO and SiO in weld seam
2along with the increase of aluminium content gradually by Al
2o
3replaced.About research shows that adding appropriate aluminium content in weld seam can make AF content increase, thus improve welding seam toughness.Aluminium content of the present invention selects 0.01 ~ 0.05%.
Ti: mainly exist with the form of TiN and titanyl compound in steel welded joint.The tiny TiN particle of Dispersed precipitate prevents Austenite Grain Growth effectively.The composite oxides of Si, Mn, Ti, Al, Ca and Mg etc. of the distribution of a large amount of fine uniform are mingled with the nucleation and growth being beneficial to acicular ferrite, thus the toughness of weld metal under improving high heat-input.The content of titanium of the present invention selects 0.01 ~ 0.05%.
Mg, Ce: adding of magnesium, cerium is mainly considered by Oxide Metallurgy principle, the oxide inclusions of the magnesium produced in weld seam during welding, cerium promotes that the generation of AF is to improve Weld Performance.Content of magnesium of the present invention is for being not more than 0.005%, and cerium content is for being not more than 0.001%.
P, S: phosphorus, sulphur are impurity element.Phosphorus content is too high can worsen material at low temperature toughness, and sulphur can increase the hot crackability of material.Consider smelting cost, phosphorus of the present invention, sulfur content are selected to be respectively and are not more than 0.015% and be not more than 0.01% simultaneously.
Carry out control according to the chemical composition of the welding wire of table 1 to smelt, wire rod made to the Rolling from Ingot of having smelted, then heat-treat, drawing, the finally welding wire (embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5) of acquisition Ф 4.5mm.
The chemical composition (mass percent, %) of table 1 embodiment of the present invention 1 ~ 5 submerged-arc welding wire
Adopt above-mentioned 5 kinds of welding wires (embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5) to carry out submerged arc welding, test plate (panel) adopts the form of downhand welding docking.Steel plate is E40 steel plate, thickness 20mm, groove 60 °, root face 5mm.Heat input is respectively 60kJ/cm, 100kJ/cm, 120kJ/cm and 160kJ/cm, and solder flux is alkalescent sintered flux GM55, and basicity is 2.9, layer temperature 150 DEG C.
Weld metal mechanical property the results are shown in Table 2.
Table 2 adopts the weld metal mechanical property of the embodiment of the present invention 1 ~ 3 submerged-arc welding wire
As can be seen from Table 2, this welding wire mates with alkalescent sintered flux GM55, and heat inputs within the scope of 60kJ/cm-160kJ/cm, weld metal excellent in low temperature toughness, weld metal-20 DEG C of impact absorbing energy A
kv94 ~ 159J ,-40 DEG C of impact absorbing energy A
kv48 ~ 118J.
Submerged-arc welding wire of the present invention, is applicable to the low-alloy high-strength steel high heat-input submerged arc welding of tensile strength rank at more than 400MPa, is specially adapted to the high heat-input submerged arc welding of A/D/E36 rank and A/D/E40 class boat slab.
Claims (9)
1. a high heat-input submerged-arc welding wire, is characterized in that:
The chemical composition of described submerged-arc welding wire is by mass percentage: C 0.01 ~ 0.08, Si0.1 ~ 0.8, Mn 1.0 ~ 2.0, Ni 0.1 ~ 1.0, Mo 0.1 ~ 1.0, Al 0.01 ~ 0.05, Ti 0.01 ~ 0.05, Mg≤0.005, Ce≤0.001, P≤0.015, S≤0.01, surplus is Fe and impurity.
2. high heat-input submerged-arc welding wire as claimed in claim 1, is characterized in that:
The hot input range that described submerged-arc welding wire is suitable for is 60 ~ 160kJ/cm.
3. high heat-input submerged-arc welding wire as claimed in claim 1, is characterized in that:
The weld seam that described welding wire obtains, microstructure is in a state of use TiN particle bainite structure and acicular ferrite matrix with disperse, and the composite oxides of Si, Mn, Ti, Al, Ce and Mg etc. are mingled with, and sulphide inculsion.
4. high heat-input submerged-arc welding wire as claimed in claim 3, is characterized in that:
The weld seam that described welding wire obtains, microstructure in a state of use has silicon further, oxygen combines the silicate and compound thereof that are formed, as the nucleating agent of acicular ferrite.
5. high heat-input submerged-arc welding wire as claimed in claim 3, is characterized in that:
The weld seam that this welding wire obtains, microstructure in a state of use has manganese sulfide further.
6. high heat-input submerged-arc welding wire as claimed in claim 1, is characterized in that:
Described welding wire is applicable to the low-alloy high-strength steel high heat-input submerged arc welding of tensile strength rank at more than 400MPa.
7. high heat-input submerged-arc welding wire as claimed in claim 6, is characterized in that:
Described welding wire is applicable to the high heat-input submerged arc welding of A/D/E36 rank and A/D/E40 class boat slab.
8. high heat-input submerged-arc welding wire as claimed in claim 1, is characterized in that:
Mate with alkalescent sintered flux GM55.
9. high heat-input submerged-arc welding wire as claimed in claim 1, is characterized in that:
The weld seam that described welding wire obtains, there is following mechanical property: tensile strength 570-650Rm/MPa, yield strength 450-553Rp0.2/MPa, contraction percentage of area Z/%61-75, percentage elongation A/%22-28,-20 DEG C of impact absorbing energy 94-159J Akv-20 DEG C/J ,-40 DEG C of impact absorbing energy 48-118J Akv-40 DEG C/J.
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| CN201410728048.4A CN104476008A (en) | 2014-12-03 | 2014-12-03 | Welding wire for high-heat-input submerged-arc welding |
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| CN201410728048.4A CN104476008A (en) | 2014-12-03 | 2014-12-03 | Welding wire for high-heat-input submerged-arc welding |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234583A (en) * | 2015-10-26 | 2016-01-13 | 钢铁研究总院 | X80 submerged-arc welding wire applicable to welding of coal-to-gas pipes |
| CN105458549A (en) * | 2015-12-18 | 2016-04-06 | 钢铁研究总院 | Submerged arc welding wire for reactor supporting structure steel |
| CN107999958A (en) * | 2017-12-08 | 2018-05-08 | 首钢集团有限公司 | A kind of welding method for ensureing armour plate welding point ballistic performance |
| CN112404671A (en) * | 2020-11-06 | 2021-02-26 | 李素坤 | Solid welding wire for FCB (flux cored arc welding) method high heat input submerged arc welding and preparation method and application thereof |
| CN113798729A (en) * | 2021-09-23 | 2021-12-17 | 包头钢铁（集团）有限责任公司 | Rare earth solid welding wire with excellent low-temperature impact toughness |
| CN114378480A (en) * | 2022-02-08 | 2022-04-22 | 张家港荣盛特钢有限公司 | Large-heat-input submerged-arc welding wire steel wire rod and preparation method thereof, large-heat-input submerged-arc welding wire and large-heat-input welding method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234583A (en) * | 2015-10-26 | 2016-01-13 | 钢铁研究总院 | X80 submerged-arc welding wire applicable to welding of coal-to-gas pipes |
| CN105458549A (en) * | 2015-12-18 | 2016-04-06 | 钢铁研究总院 | Submerged arc welding wire for reactor supporting structure steel |
| CN107999958A (en) * | 2017-12-08 | 2018-05-08 | 首钢集团有限公司 | A kind of welding method for ensureing armour plate welding point ballistic performance |
| CN112404671A (en) * | 2020-11-06 | 2021-02-26 | 李素坤 | Solid welding wire for FCB (flux cored arc welding) method high heat input submerged arc welding and preparation method and application thereof |
| CN113798729A (en) * | 2021-09-23 | 2021-12-17 | 包头钢铁（集团）有限责任公司 | Rare earth solid welding wire with excellent low-temperature impact toughness |
| CN114378480A (en) * | 2022-02-08 | 2022-04-22 | 张家港荣盛特钢有限公司 | Large-heat-input submerged-arc welding wire steel wire rod and preparation method thereof, large-heat-input submerged-arc welding wire and large-heat-input welding method |
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Application publication date: 20150401 |