CN108857140A - Antidetonation is anti-corrosion 460MPa grades of welding wire for submerged-arc welding of fire-resistive construction structural steel - Google Patents
Antidetonation is anti-corrosion 460MPa grades of welding wire for submerged-arc welding of fire-resistive construction structural steel Download PDFInfo
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- CN108857140A CN108857140A CN201810838237.5A CN201810838237A CN108857140A CN 108857140 A CN108857140 A CN 108857140A CN 201810838237 A CN201810838237 A CN 201810838237A CN 108857140 A CN108857140 A CN 108857140A
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- Prior art keywords
- welding
- welding wire
- submerged
- weld metal
- arc welding
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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
- B23K35/3073—Fe as the principal constituent with Mn as next major 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
A kind of 460MPa grades of welding wire for submerged-arc welding of antidetonation anti-corrosion fire-resistive construction structural steel, belong to technical field of welding materials.Its chemical element mass percentage content is：C：0.01-0.15%, Si：0.10-0.40%, Cr：0.10-0.90%, Ni：0.10-3.0%, Cu：0-0.70%, Mn：0.50-1.80%, Mo：0.20-0.59%, Ti：0-0.12%, V：0-0.08%, Mg：0-0.08%, surplus are Fe and inevitable impurity.Using welding wire of the present invention carry out submerged arc welding after, be formed by weld metal yield strength be 400-560Mpa, tensile strength and be 430-630MPa, elongation percentage A be 22-26%, contraction percentage of area 67-73%.Weld metal high-temperature yield strength is 300-390MPa.And there is high low-temperature impact toughness.The welding wire can be applied to the submerged arc welding of the anti-corrosion fire-resistive construction structural steel of 460MPa grades of antidetonations.
Description
Technical field
The invention belongs to technical field of welding materials more particularly to a kind of anti-corrosion fire-resistive construction structural steel 460MPa of antidetonation
Grade welding wire for submerged-arc welding.
Background technique
As steel material cost declines, the maturation of technology, more and more high-rise building designs use steel structure frame.
The construction steel structure in China also obtains rapid development.Important feature form of the steel construction as building, becomes architectural development
Direction.The super high-rise building of especially China in Recent Years is great to be increased, and building fire and its escape become one and great choose
War, 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 declines rapidly.As it can be seen that its intensity will reduce building steel at high operating temperatures, or even bearing capacity is lost, causes to build
It builds object to collapse and cause casualties and property loss, is not able to satisfy the design requirement of steel construction skyscraper.
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 design strength, to protect
The safety for demonstrate,proving building structure, belongs to High-Strength Low-Alloy structural steel.In addition, Fire-resistant Steels Used in Buildings is in addition to good height
Outside warm intensity, it is necessary to have good plasticity and toughness, weldability and shock resistance, processing forming of common building structural steel etc.
Deng.
Due to connecting large-scale use welding technique, therefore root for the combination of steel member in construction steel structure is constructed
Corresponding welding material is matched according to the alloying element content and mechanical property of Fire-resistant Steels Used in Buildings.
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 strong not less than the safety of structure design
Degree, to guarantee the safety of building structure.
Summary of the invention
The purpose of the present invention is to provide a kind of 460MPa 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 excellent plasticity.
For achieving the above object, its chemical element mass percentage content of the invention is：C：0.01-0.15%, Si：
0.10-0.40%, Cr：0.10-0.90%, Ni：0.10-3.0%, Cu：0-0.70%, Mn：0.50-1.80%, Mo：0.20-
0.59%, Ti：0-0.12%, V：0-0.08%, Mg：0-0.08%, surplus are Fe and inevitable impurity.
Inevitable impurity is other than P and S element in the technical program, further includes Al, O and H element, as can not
The plastic toughness of the impurity element avoided, P and the equal Resistance of Weld Metal of 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.Therefore, it is 0.2-0.59wt.% 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.V content is 0-0.08wt.% in the present invention.
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 0-0.7wt.%.
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 0.10-0.4wt.% 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 0.1-0.9wt.%.
Ni：On the one hand the intensity that can ensure 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 0.1-3.0wt.% by the present invention.
Mn：With 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
0.5-1.8wt.%.
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 400-
560Mpa, tensile strength and be 430-630MPa, elongation percentage A be 22-26%, contraction percentage of area 67-73%.Weld metal is high
Warm yield strength is 300-390MPa.And there is high low-temperature impact toughness.Therefore, welding wire of the present invention can be applied
In the submerged arc welding of the anti-corrosion fire-resistive construction structural steel of 460MPa grades of antidetonations.
Specific embodiment
Welding wire for submerged-arc welding of the present invention is explained and illustrated below in conjunction with specific embodiments, however the explanation
Improper restriction is not constituted to technical solution of the present invention with explanation.The chemical component quality percentage of welding wire in embodiment of this case
Proportion is shown in Table 1.
Chemical composition mass percentage distribution ratio (wt.%) the surplus Fe of welding wire in 1 embodiment of table
| C | Si | Mn | Cr | Mo | Ni | Cu | Ti | V | Mg | |
| 1 | 0.03 | 0.31 | 0.56 | 0.25 | 0.59 | 0.64 | 0.31 | 0.12 | 0.08 | 0.08 |
| 2 | 0.15 | 0.4 | 1.16 | 0.73 | 0.40 | 1.57 | 0 | 0 | 0 | 0.06 |
| 3 | 0.11 | 0.13 | 1.03 | 0.14 | 0.35 | 0.16 | 0.59 | 0.08 | 0.01 | 0.03 |
| 4 | 0.01 | 0.18 | 0.64 | 0.36 | 0.56 | 2.99 | 0.48 | 0.04 | 0.08 | 0.07 |
| 5 | 0.04 | 0.23 | 0.84 | 0.48 | 0.50 | 1.14 | 0.29 | 0.01 | 0.06 | 0 |
| 6 | 0.12 | 0.29 | 1.78 | 0.9 | 0.20 | 0.94 | 0.44 | 0.1 | 0.02 | 0.02 |
| 7 | 0.04 | 0.05 | 1.35 | 0.84 | 0.48 | 0.34 | 0.57 | 0.09 | 0.05 | 0.03 |
| 8 | 0.08 | 0.39 | 0.64 | 0.05 | 0.25 | 1.48 | 0.29 | 0.07 | 0.04 | 0.01 |
Welding wire in the embodiment of the present invention 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 in embodiment
Welding wire welded, welding do not preheat, wherein embodiment using SJ101 be used as solder flux, interlayer temperature control 120~150
Between DEG C, thermal weld stress control is 15~20kJ/cm, and multi-layer multi-pass welding is carried out on base material, guarantees weld seam full penetration.Weldering
After connecing, Resistance of Weld Metal carries out full elemental spectral analysis, longitudinal tensile test (room temperature, 600 DEG C) respectively.
Table 2 lists the welding wire in embodiment of this case after submerged arc welding, the mechanical property of obtained weld metal.
The mechanical property 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, in room temperature intensity with higher, preferable plasticity and preferable cracking resistance, 600 DEG C, continue 3 hours after
Tensile property is still able to maintain higher intensity, thus illustrates that welding wire of the invention can be with fire resisting high strength steel phase for building
Matching, is 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 460MPa grades of welding wire for submerged-arc welding of antidetonation anti-corrosion fire-resistive construction structural steel, which is characterized in that its chemical element quality
Degree is：C：0.01-0.15%, Si：0.10-0.40%, Cr：0.10-0.90%, Ni：0.10-3.0%, Cu：0-
0.70%, Mn：0.50-1.80%, Mo：0.20-0.59%, Ti：0-0.12%, V：0-0.08%, Mg：0-0.08%, surplus
For Fe and inevitable impurity.
2. 460MPa grades of welding wire for submerged-arc welding of the anti-corrosion fire-resistive construction structural steel of antidetonation according to claim 1, which is characterized in that
Al+S+P+O+N is controlled≤0.15%.
3. 460MPa grades of welding wire for submerged-arc welding of the anti-corrosion fire-resistive construction structural steel of antidetonation according to claim 1 or 2, feature exist
In, be formed by weld metal yield strength be 400-560Mpa, tensile strength and be 430-630MPa, elongation percentage A be 22-
26%, contraction percentage of area 67-73%.Weld metal high-temperature yield strength is 300-390MPa.
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| CN201810838237.5A CN108857140A (en) | 2018-07-26 | 2018-07-26 | Antidetonation is anti-corrosion 460MPa grades of welding wire for submerged-arc welding of fire-resistive construction structural steel |
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| CN201810838237.5A CN108857140A (en) | 2018-07-26 | 2018-07-26 | Antidetonation is anti-corrosion 460MPa grades of welding wire for submerged-arc welding of fire-resistive construction structural steel |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110666311A (en) * | 2019-08-29 | 2020-01-10 | 江苏省沙钢钢铁研究院有限公司 | High-efficiency welding process for multi-element composite microalloyed molybdenum-saving refractory steel |
| CN111360448A (en) * | 2020-03-30 | 2020-07-03 | 南京钢铁股份有限公司 | Welding wire and method for welding refractory steel with yield strength of 420MPa |
| CN112372117A (en) * | 2020-12-02 | 2021-02-19 | 南京钢铁股份有限公司 | Large heat input submerged arc welding method for refractory steel with yield strength of 460MPa and thickness of 60mm |
| 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 |
| CN113695784A (en) * | 2021-07-29 | 2021-11-26 | 钢铁研究总院 | Welding wire for FCB (flux cored arc welding) method high heat input submerged arc welding and preparation thereof, welding flux and preparation thereof, welding material and application thereof |
| CN114182166A (en) * | 2021-11-01 | 2022-03-15 | 上大新材料(泰州)研究院有限公司 | 390 MPa-grade low-alloy corrosion-resistant steel and preparation method thereof |
| WO2022267149A1 (en) * | 2021-06-23 | 2022-12-29 | 南京钢铁股份有限公司 | 460 mpa-grade all-position gas shielded welding wire for building resistant to secondary fire and manufacturing method |
| WO2022267148A1 (en) * | 2021-06-23 | 2022-12-29 | 南京钢铁股份有限公司 | 390 mpa-grade full-position gas-shielded welding wire for secondary fire-resistant building and fabrication method |
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| CN110666311A (en) * | 2019-08-29 | 2020-01-10 | 江苏省沙钢钢铁研究院有限公司 | High-efficiency welding process for multi-element composite microalloyed molybdenum-saving refractory steel |
| 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 |
| CN111360448A (en) * | 2020-03-30 | 2020-07-03 | 南京钢铁股份有限公司 | Welding wire and method for welding refractory steel with yield strength of 420MPa |
| CN112372117A (en) * | 2020-12-02 | 2021-02-19 | 南京钢铁股份有限公司 | Large heat input submerged arc welding method for refractory steel with yield strength of 460MPa and thickness of 60mm |
| 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 |
| WO2022267149A1 (en) * | 2021-06-23 | 2022-12-29 | 南京钢铁股份有限公司 | 460 mpa-grade all-position gas shielded welding wire for building resistant to secondary fire and manufacturing method |
| WO2022267148A1 (en) * | 2021-06-23 | 2022-12-29 | 南京钢铁股份有限公司 | 390 mpa-grade full-position gas-shielded welding wire for secondary fire-resistant building and fabrication method |
| CN113695784A (en) * | 2021-07-29 | 2021-11-26 | 钢铁研究总院 | Welding wire for FCB (flux cored arc welding) method high heat input submerged arc welding and preparation thereof, welding flux and preparation thereof, welding material and application thereof |
| CN114182166A (en) * | 2021-11-01 | 2022-03-15 | 上大新材料(泰州)研究院有限公司 | 390 MPa-grade low-alloy corrosion-resistant steel and preparation method thereof |
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Application publication date: 20181123 |