CN109048117A - Antidetonation is anti-corrosion 690MPa grades of welding wire for submerged-arc welding of fire-resistive construction structural steel - Google Patents
Antidetonation is anti-corrosion 690MPa grades of welding wire for submerged-arc welding of fire-resistive construction structural steel Download PDFInfo
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- CN109048117A CN109048117A CN201810838250.0A CN201810838250A CN109048117A CN 109048117 A CN109048117 A CN 109048117A CN 201810838250 A CN201810838250 A CN 201810838250A CN 109048117 A CN109048117 A CN 109048117A
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Classifications
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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
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
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- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
A kind of 690MPa grades of welding wire for submerged-arc welding of antidetonation anti-corrosion fire-resistive construction structural steel, belong to technical field of welding materials.Chemical element mass percentage content are as follows: C:0.01-0.15%, Si:0.10-0.40%, Cr:0-0.70%, Ni:1.0-3.5%, Cu:0.20-0.90%, Mn:1.20-2.20%, Mo:0.60-1.00%, Ti:0-0.12%, V:0-0.10%, Mg:0-0.10%；Surplus is Fe and inevitable impurity.The advantage is that weld the weld metal to be formed with higher room temperature intensity and elevated temperature strength using the welding wire, while the weld metal to be formed is welded also using the welding wire there is good cracking resistance, preferable welding performance and preferable plasticity.
Description
Technical field
The invention belongs to technical field of welding materials, use more particularly to a kind of anti-corrosion fire-resistive construction structural steel of antidetonation
690MPa grades of welding wire for submerged-arc welding.
Background technique
As steel material cost declines, the maturity of technology is improved, and more and more high-rise building designs use steel knot
Structure frame.The construction steel structure in China also obtains rapid development.Important feature form of the steel construction as building, becomes and builds
Build the direction of development.The super high-rise building of especially China in Recent Years is increasing, and building fire and its escape become one
Significant challenge seriously constrains the development of steel building.
That there are fire endurances is low for conventional steel construction, easily softens in fire and loses basic bearing capacity.Test result
Show the temperature of scene of fire soon up to 500-1100 DEG C.Common building steel is in 350 DEG C or more high temperature, surrender
Intensity is dropped rapidly to 2/3 or less room-temperature yield strength.As it can be seen that its intensity will reduce building steel at high operating temperatures,
Bearing capacity even is lost, causes building collapsing and causes casualties and property loss, be not able to satisfy steel construction high level and build
The design requirement built.
Fire-resistant Steels Used in Buildings is developed in recent years as a result,.Heat resisting steel has preferable elevated temperature strength, usually normal
The lower carrying of temperature, after encountering 600 DEG C of fire or so lower holdings (3-4h), intensity is not less than the 2/3 of room temperature intensity, to guarantee to build
The safety of building structure belongs to High-Strength Low-Alloy structural steel.690MPa steel is due to its higher intensity, in construction steel structure
Applied in key position and important load-carrying members and future architecture steel development trend.In addition, Fire-resistant Steels Used in Buildings
Other than with good elevated temperature strength, it is necessary to have the good plasticity and toughness of common building structural steel, weldability and anti-
Pinking, processing forming etc..
Due to connecting large-scale use welding technique for the combination of steel member, therefore need in construction steel structure is constructed
The welding material that the alloying element content and mechanical property of exploitation and Fire-resistant Steels Used in Buildings match.
In steel building site operation and the manufacture of large-scale steel structure prefabricated component, submerged-arc welding is because it is in welding efficiency, weldering
The superiority of seam quality etc. is widely used.Its mechanical property, especially high-temperature behavior similarly need to reach for building
The performance of refractory steel, i.e., after encountering 600 DEG C of fire or so lower holdings (3-4), intensity is not less than the 2/3 of room temperature intensity, with
Guarantee the safety of building structure.
Summary of the invention
The purpose of the present invention is to provide a kind of 690MPa grades of welding wire for submerged-arc welding of antidetonation anti-corrosion fire-resistive construction structural steel.Using
The welding wire welds the weld metal to be formed with higher room temperature intensity and elevated temperature strength, while welding to be formed using the welding wire
Weld metal also there is good cracking resistance, preferable welding performance and preferable plasticity.
For achieving the above object, chemical element mass percentage content of the present invention are as follows:
C:0.01-0.15%, Si:0.10-0.40%, Cr:0-0.70%, Ni:1.0-3.5%, Cu:0.20-0.90%,
Mn:1.20-2.20%, Mo:0.60-1.00%, Ti:0-0.12%, V:0-0.10%, Mg:0-0.10%；Surplus is for Fe and not
Evitable impurity.
Inevitable impurity further includes the elements such as Al, O and H other than P and S element in the present invention.As can not keep away
The plastic toughness of the impurity element exempted from, the Resistance of Weld Metal such as P and S is harmful, and the lower the content of these impurity elements should be the better.
Therefore, content wants strict control, can control Al+S+P+O+N≤0.15% in the inventive solutions.
The restriction reason of each chemical element of the present invention is described below respectively:
Mo: for improving weld metal room temperature and elevated temperature strength.Mo is that hardening element and middle strong carbide form member
Element can effectively improve alloy strength.In addition, Mo can postpone the transformation of pro-eutectoid ferrite, and strong inhibition perlitic transformation, promote
Inserting needle columnar ferrite is formed.When Mo content changes between 0-1.1%, seam organization is acicular ferrite, pro-eutectoid ferrite
And ferrite side plate, toughness and intensity increase simultaneously, but also promote M-A constituent element and bainite is formed, while strong flexor ratio and
Elongation percentage decline.It is 0.6-1.0wt.% that the present invention, which controls Mo content,.
V: for improving weld metal room temperature and elevated temperature strength.The stability of overcooling austenite can be improved, so that material
Phase transition temperature reduce, with fining austenite grains, increase austenite grain boundary and reached to promote ferrite and bainite forming core
To refinement secondary structure, improve the effect of tissue morphology and substructure.V has stronger precipitation strength to act at high temperature, can be with
Improve elevated temperature strength.In welding wire of the present invention, needing to control V content is 0-0.1wt.%.
Cu: for improving weld metal room temperature and elevated temperature strength.With the increase of copper content, the intensity of weld metal is because solid
The effect of molten reinforcing and gradually increase.Precipitation strength effect is primarily served at high temperature.Adding certain Cu element simultaneously can be with
It is effectively prevented the generation of hydrogen embrittlement, is critically important beneficial effect for high strength welding wire steel.The quality of Cu in the present invention
Degree is set as 0.2-0.9wt.%.
Mg: for improving the toughness of weld metal under high input welding condition.Meanwhile Mg can also reduce field trash and steel
Liquid angle of wetting has the function that field trash refines.Mg content is 0-0.08wt.% in the present invention.
C: an important factor for weld metal strength protection, with the increase of C content, yield strength and tensile strength are increased, but
Excessively high C content will promote high carbon martensite to be formed, and seriously endanger weld metal toughness reduction and cracking resistance.Therefore, this hair
It is bright ensureing intensity, toughness and under the premise of cracking resistance, C content controlled as 0.01-0.15wt.%.
Si: the abundant deoxidation of weld metal can be ensured in welding process, other oxides is avoided to be mingled with to be formed.Furthermore Si may be used also
To increase the intensity of weld metal, but weld metal toughness can be seriously affected when Si content is greater than 0.6% in weld metal.For
This, Si content is in 0.10-0.40wt.% in present invention control welding wire.
Cr:Cr element effectively improves the corrosion proof effect of weld metal.Meanwhile weld metal can be improved in Cr
Harden ability, to improve its intensity.The Cr element of certain content can play the role of fining ferrite grains, to increase weldering
Stitch the obdurability of metal secondary structure.But the Cr of too high levels can reduce the toughness of weld metal, also will increase weld metal
Cool attenuation.In consideration of it, the Cr content control in technical solution of the present invention is 0-0.7wt.%.
Ni: on the one hand can ensure the intensity of weld metal, on the other hand can improve weld metal low-temperature flexibility.Ni can be unlimited
It is solid-solution in γ-Fe, is the element for expanding γ phase region, addition Ni can promote the formation of acicular ferrite, it is tough to improve weld metal
Property.Ni content is set to 1.0-3.5wt.% by the present invention.
Mn: having good deoxidation and desulfidation, while being also one of the main alloy element of proof strength, strengthens
Effect is only second to C element.Phase transition temperature can be effectively reduced in addition Mn element.But excessively high Mn content will lead to harden ability and substantially mention
It rises, martensite content increases, and is unfavorable for low-temperature flexibility and cracking resistance.Therefore, the Mn content control in welding wire is by the present invention
1.2-2.2wt.%.
Ti: deoxidant element and there is very strong affinity with N.Ti is reacted with N in austenite generates TiN particle, can be used as needle
The forming core core of columnar ferrite, can effectively prevent crystal grain and grows up, and improve weld metal low-temperature flexibility.The present invention controls Ti content
For 0-0.12wt.%
Remaining is Fe and inevitable impurity.
Welding wire preparation of the present invention is using conventional manufacturing process general in industry, without particular requirement.Using appropriate
The raw material of ratio are smelted the subject alloy ingredient needed for obtaining, and are cast into steel ingot, and forged, hot rolling, wire drawing, at surface
It manages, twine the processes such as axis, packaging, obtain finished product welding wire.
After carrying out submerged arc welding using welding wire of the present invention, the yield strength for being formed by weld metal is 703-
776MPa, tensile strength and be 709-815MPa, elongation percentage A be 18-24%.Weld metal high-temperature yield strength is 461-
495MPa.And there is high low-temperature impact toughness.The welding wire can be applied to the anti-corrosion fire-resistive construction structural steel of 690MPa grades of antidetonations
Submerged arc welding.
Specific embodiment
Below in conjunction with specific embodiments to welding wire for submerged-arc welding of the present invention, however the explanation and illustration is not to this
The technical solution of invention constitutes improper restriction.
Table 1 shows the chemical composition mass percentage distribution ratio of the welding wire in embodiment of this case.
Chemical composition mass percentage distribution ratio (wt.%) surplus of welding wire in 1 embodiment of this case of table is Fe
| C | Si | Mn | Cr | Mo | Ni | Cu | Ti | V | Mg | |
| 1 | 0.05 | 0.16 | 1.39 | 0.25 | 0.81 | 2.52 | 0.67 | 0.12 | 0.05 | 0.08 |
| 2 | 0.13 | 0.23 | 1.49 | 0.49 | 0.65 | 1.13 | 0.43 | 0.06 | 0.07 | 0.03 |
| 3 | 0.08 | 0.40 | 2.05 | 0.70 | 0.73 | 1.62 | 0.20 | 0.06 | 0.06 | 0.02 |
| 4 | 0.01 | 0.18 | 1.89 | 0.15 | 0.98 | 3.47 | 0.55 | 0.08 | 0 | 0.07 |
| 5 | 0.10 | 0.10 | 2.20 | 0.31 | 0.67 | 1.23 | 0.74 | 0.12 | 0.08 | 0.10 |
| 6 | 0.15 | 0.24 | 1.20 | 0.54 | 0.60 | 3.19 | 0.90 | 0 | 0.10 | 0.05 |
| 7 | 0.06 | 0.36 | 1.59 | 0.37 | 0.78 | 1.68 | 0.84 | 0.09 | 0.04 | 0 |
| 8 | 0.02 | 0.19 | 1.28 | 0.01 | 0.92 | 1.02 | 0.35 | 0.04 | 0.02 | 0.06 |
Welding wire in the embodiment 1-3 of this case is made using the following steps: smelting, refining, casting, hot rolling, slow cooling, spinning
At wire rod, pickling is rough to pull out, heat treatment, thin drawing.These steps are essentially the general procedure of welding wire manufacturing field, therefore this
These manufacturing steps are no longer described in detail in technical solution.Only heat treatment step therein is different from the prior art,
And it is closely related with the implementation result of this case.In the technical scheme, heat treatment temperature is 680-720 DEG C, and cooling procedure
For slow cooling, cooling time is 5 hours.
The low alloy high strength steel plate of plate thickness 20mm, groove type are 45 ° of single side V-types, gap 16mm, using embodiment 1-
Welding wire is welded in 3, welding do not preheat, wherein embodiment using SJ101 be used as solder flux, interlayer temperature control 150 DEG C it
Between, thermal weld stress control is 20kJ/cm, and multi-layer multi-pass welding is carried out on base material, guarantees weld seam full penetration.It is right after welding
Weld metal carries out full elemental spectral analysis, longitudinal tensile test (room temperature, 600 DEG C) respectively.
The stretching mechanical of the obtained weld metal after Shielding gas of the welding wire in embodiment of this case is listed in table 2
Performance.
The tensile mechanical properties of 2 weld metal of table
The surrender of obtained weld metal after submerged arc welding is carried out using the welding wire in above-described embodiment it can be seen from table
Intensity, 600 DEG C, continue 3 hours after tensile property be still able to maintain higher elevated temperature strength.Experimental result illustrates this hair
The intensity with higher and preferable high-temperature behavior of bright welding wire, preferable plasticity and preferable cracking resistance, every power
Learning performance can match with fire resisting high strength steel for building, be a kind of submerged arc welding material suitable for building field.
It should be noted that the above list is only specific embodiments of the present invention, it is clear that the present invention is not limited to above real
Example is applied, there are many similar variations therewith.If those skilled in the art directly exported from present disclosure or
All deformations associated, are within the scope of protection of the invention.
Claims (3)
1. a kind of 690MPa grades of welding wire for submerged-arc welding of antidetonation anti-corrosion fire-resistive construction structural steel, which is characterized in that chemical element quality hundred
Divide and compare content are as follows: C:0.01-0.15%, Si:0.10-0.40%, Cr:0-0.70%, Ni:1.0-3.5%, Cu:0.20-
0.90%, Mn:1.20-2.20%, Mo:0.60-1.00%, Ti:0-0.12%, V:0-0.10%, Mg:0-0.10%；Surplus
For Fe and inevitable impurity.
2. welding wire for submerged-arc welding according to claim 1, which is characterized in that controlling Al+S+P+O+N≤0.15%.
3. welding wire for submerged-arc welding according to claim 1 or 2, which is characterized in that the yield strength for being formed by weld metal is
703-776MPa, tensile strength and be 709-815MPa, elongation percentage A be 18-24%.Weld metal high-temperature yield strength is 461-
495MPa.And there is high low-temperature impact toughness.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810838250.0A CN109048117A (en) | 2018-07-26 | 2018-07-26 | Antidetonation is anti-corrosion 690MPa grades of welding wire for submerged-arc welding of fire-resistive construction structural steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810838250.0A CN109048117A (en) | 2018-07-26 | 2018-07-26 | Antidetonation is anti-corrosion 690MPa grades of welding wire for submerged-arc welding of fire-resistive construction structural steel |
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| CN109048117A true CN109048117A (en) | 2018-12-21 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280925A (en) * | 2019-07-16 | 2019-09-27 | 南京钢铁股份有限公司 | A kind of welding wire for submerged-arc welding for high building structure refractory steel |
| CN110539100A (en) * | 2019-09-10 | 2019-12-06 | 沈阳工业大学 | High-nitrogen low-nickel high-temperature flux-cored wire and preparation process thereof |
| CN110549033A (en) * | 2019-09-12 | 2019-12-10 | 四川西冶新材料股份有限公司 | weather-resistant bridge steel Q690qE matched gas shielded welding wire and preparation method thereof |
| CN110877167A (en) * | 2019-12-16 | 2020-03-13 | 钢铁研究总院 | 690 MPa-level submerged arc welding wire for anti-seismic, corrosion-resistant and fire-resistant building structural steel |
| CN112045331A (en) * | 2020-08-12 | 2020-12-08 | 钢铁研究总院 | Welding material for high-toughness, corrosion-resistant and fire-resistant low-alloy high-strength steel |
| CN112935627A (en) * | 2021-02-07 | 2021-06-11 | 天津市金桥焊材集团股份有限公司 | Consumable electrode gas shielded solid welding wire for welding refractory weathering steel |
| CN112975211A (en) * | 2021-02-09 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Low-yield-ratio high-toughness submerged-arc welding material for Q690-grade weather-resistant bridge |
| 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 |
| CN116810214A (en) * | 2023-06-26 | 2023-09-29 | 苏州骐骥焊接材料有限公司 | Low-temperature high-strength submerged arc welding wire and application thereof |
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| CN110539100A (en) * | 2019-09-10 | 2019-12-06 | 沈阳工业大学 | High-nitrogen low-nickel high-temperature flux-cored wire and preparation process thereof |
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| CN110549033A (en) * | 2019-09-12 | 2019-12-10 | 四川西冶新材料股份有限公司 | weather-resistant bridge steel Q690qE matched gas shielded welding wire and preparation method thereof |
| CN110877167A (en) * | 2019-12-16 | 2020-03-13 | 钢铁研究总院 | 690 MPa-level submerged arc welding wire for anti-seismic, corrosion-resistant and fire-resistant building structural steel |
| CN112045331A (en) * | 2020-08-12 | 2020-12-08 | 钢铁研究总院 | Welding material for high-toughness, corrosion-resistant and fire-resistant low-alloy high-strength steel |
| CN112935627A (en) * | 2021-02-07 | 2021-06-11 | 天津市金桥焊材集团股份有限公司 | Consumable electrode gas shielded solid welding wire for welding refractory weathering steel |
| CN112975211A (en) * | 2021-02-09 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Low-yield-ratio high-toughness submerged-arc welding material for Q690-grade weather-resistant bridge |
| 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 |
| CN116810214A (en) * | 2023-06-26 | 2023-09-29 | 苏州骐骥焊接材料有限公司 | Low-temperature high-strength submerged arc welding wire and application thereof |
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