CN108788518A - Antidetonation is anti-corrosion fire-resistive construction structural steel grade gas shielded welding wires of 690MPa - Google Patents
Antidetonation is anti-corrosion fire-resistive construction structural steel grade gas shielded welding wires of 690MPa Download PDFInfo
- Publication number
- CN108788518A CN108788518A CN201810838255.3A CN201810838255A CN108788518A CN 108788518 A CN108788518 A CN 108788518A CN 201810838255 A CN201810838255 A CN 201810838255A CN 108788518 A CN108788518 A CN 108788518A
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- CN
- China
- Prior art keywords
- weld metal
- welding
- gas shielded
- 690mpa
- welding wire
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Classifications
-
- 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
-
- 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
- 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
Abstract
A kind of antidetonation anti-corrosion fire-resistive construction structural steel grade gas shielded welding wires of 690MPa, belong to technical field of welding materials.The welding wire chemical element mass percentage content is：C：0.02-0.14%, Si：0.41-1.00%, Cr：0-0.70%, Ni：1.00-3.50%, 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 welding wire carry out gas shielded welding after, be formed by weld metal yield strength be 469-592Mpa, tensile strength and be 538-661Mpa, elongation percentage A be 18-22%.Weld metal high-temperature yield strength is 463-535MPa；And there is high low-temperature impact toughness.
Description
Technical field
The invention belongs to technical field of welding materials, are used more particularly to a kind of anti-corrosion fire-resistive construction structural steel of antidetonation
The grade gas shielded welding wires of 690MPa.
Background technology
As the decline of steel material cost and technology are gradually ripe, more and more high-rise building designs use steel construction
Frame.The construction steel structure in China also obtains rapid development.Important feature form of the steel construction as building, becomes building
The direction of development.The especially high-rise building increasing fast of China in Recent Years, building fire and its escape become a weight
Big challenge, being steel building must solve the problems, such as.
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 steel at high operating temperatures, even
Bearing capacity is lost, building collapsing is caused and is caused casualties and property loss, steel construction skyscraper cannot be met
Design requirement.
Fire-resistant Steels Used in Buildings is developed in recent years as a result,.Refractory steel has preferable elevated temperature strength, usually normal
The lower carrying of temperature, after encountering the lower holding (3-4h) of 600 DEG C or so of fire, intensity is not less than the 2/3 of room temperature intensity, to ensure to build
The safety of building structure belongs to High-Strength Low-Alloy structural steel.690MPa steel can be applicable to building iron knot due to its high intensity
In structure key position and important load-carrying members.In addition, Fire-resistant Steels Used in Buildings is other than with good elevated temperature strength, it is necessary to have
Good toughness, weldability and the shock resistance of standby common building structural steel, processing forming etc..
In constructing in construction steel structure, large-scale use welding technique is connected for the combination of steel member, therefore need
Corresponding welding material is matched according to the alloying element content and mechanical property of Fire-resistant Steels Used in Buildings.It is existing in steel building
In field construction and the manufacture of large-scale steel structure prefabricated component, gas shielded arc welding is because it is in the superior of welding efficiency, weldquality etc.
Property is widely used.Its mechanical property, especially high-temperature behavior similarly need the performance for reaching Fire-resistant Steels Used in Buildings, that is, are meeting
To after 600 DEG C or so lower holdings (3-4) of fire, intensity is not less than the 2/3 of room temperature intensity, to ensure the safety of building structure
Property.
Invention content
The purpose of the present invention is to provide a kind of antidetonation anti-corrosion fire-resistive construction structural steel grade gas shielded welding wires of 690MPa.
The weld metal to be formed is welded with higher room temperature intensity and elevated temperature strength using the welding wire, while also being had good anti-
Fragility energy, preferable welding performance and excellent plasticity and toughness.
For achieving the above object, welding wire chemical element mass percentage content of the present invention is：C：0.02-0.14%,
Si：0.41-1.00%, Cr：0-0.70%, Ni：1.00-3.50%, 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.
Inevitable impurity further includes the elements such as Al, O and H other than P and S elements in the technical program.As not
The plastic toughness of evitable impurity element, P and the equal Resistance of Weld Metal of S is harmful, the contents of these impurity elements should it is more low more
It is good.Therefore, content will be controlled strictly, in the inventive solutions can control Al+S+P+O+N≤0.15%.
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
It is formed into acicular ferrite.When Mo contents change 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 elements and bainite is formed, while strong flexor ratio and
Elongation percentage declines.It is 0.6-1.00wt.% that the present invention, which controls Mo contents,.
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, need to control V content to be 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 elements simultaneously can be with
It is effectively prevented the generation of hydrogen embrittlement, is critically important beneficial effect for high strength welding wire steel.Therefore, the Cu in the present invention
Mass percentage content is set as 0.2-0.9%wt.%.
Mg：Toughness for improving 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 contents are 0-0.08wt.% in the present invention as a result,.
C：An important factor for weld metal strength protection, with the increase of C content, yield strength and tensile strength increase, 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 be 0.02-0.14wt.% by C content control under the premise of cracking resistance.
Si：The abundant deoxidation of weld metal can be ensured in welding process, other oxides is avoided to be mingled with to be formed.In addition Si may be used also
To increase the intensity of weld metal, but weld metal toughness can be seriously affected when Si contents are more than 0.6% in weld metal.For
This, Si contents are in 0.41-1.00wt.% in present invention control welding wire.
Cr：Cr elements effectively improve the corrosion proof effect of weld metal.Meanwhile Cr can improve weld metal
Quenching degree, to improve its intensity.The Cr elements 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, can also increase weld metal
Cool attenuation.In consideration of it, the Cr contents control in technical scheme of the present invention is 0-0.7wt.%.
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 regions, addition Ni can promote the formation of acicular ferrite, it is tough to improve weld metal
Property.Ni contents are set to 0.1-3.5wt.% 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.Addition Mn elements can effectively reduce phase transition temperature.But excessively high Mn contents will cause quenching degree substantially to carry
It rises, martensite content increases, and is unfavorable for low-temperature flexibility and cracking resistance.Therefore, the Mn contents 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 particles, 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 contents
For 0-0.12wt.%
Remaining is Fe and inevitable impurity.
Welding wire of the present invention is prepared using conventional manufacturing process general in industry, without particular requirement.Using appropriate
The raw material of ratio are cast into steel ingot through smelting the subject alloy ingredient needed for obtaining, 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 gas shielded welding using welding wire of the present invention, the yield strength for being formed by weld metal is
469-592Mpa, tensile strength and be 538-661Mpa, elongation percentage A be 18-22%.Weld metal high-temperature yield strength is 463-
535MPa.And there is high low-temperature impact toughness.Therefore, welding wire of the present invention can be widely used in 690MPa grades
Or more superhigh intensity steel gas shielded welding.
Specific implementation mode
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 (wt.%) the surplus Fe of 1 welding wire of table
| C | Si | Mn | Cr | Mo | Ni | Cu | Ti | V | Mg | |
| 1 | 0.06 | 1 | 1.76 | 0.16 | 0.98 | 1.01 | 0.54 | 0 | 0.46 | 0.09 |
| 2 | 0.12 | 0.65 | 1.50 | 0.65 | 0.71 | 2.48 | 0.21 | 0.12 | 0.33 | 0 |
| 3 | 0.1 | 0.52 | 1.35 | 0.45 | 0.86 | 3.05 | 0.67 | 0.09 | 0.55 | 0.04 |
| 4 | 0.14 | 0.75 | 1.20 | 0.38 | 0.80 | 1.97 | 0.89 | 0.03 | 0 | 0.07 |
| 5 | 0.02 | 0.57 | 1.78 | 0.70 | 0.91 | 1.64 | 0.26 | 0.08 | 0.10 | 0.02 |
| 6 | 0.08 | 0.41 | 1.89 | 0.29 | 0.68 | 3.48 | 0.78 | 0.07 | 0.61 | 0.05 |
| 7 | 0.04 | 0.95 | 2.19 | 0 | 0.75 | 1.34 | 0.33 | 0.01 | 0.85 | 0.08 |
| 8 | 0.09 | 0.80 | 1.67 | 0.58 | 0.60 | 2.77 | 0.51 | 0.06 | 0.74 | 0.03 |
Welding wire in the embodiment 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 skill
These manufacturing steps are no longer described in detail in art scheme.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 is
Slow cooling, cooling time are 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, and welding does not preheat, and wherein embodiment 1-4 uses 100%CO2As protection gas, 5-8 uses 20%Ar+
80%CO2As protection gas, interlayer temperature controls between 150 DEG C, and thermal weld stress control is 20kJ/cm, enterprising in base material
Row multi-layer multi-pass welding ensures weld seam full penetration.After welding, Resistance of Weld Metal carries out full element spectrum analysis, Zong Xiangla respectively
Stretch experiment (room temperature, 600 DEG C).
The mechanics of the obtained weld metal after Shielding gas of the welding wire in embodiment of this case 1-8 is listed in table 2
Performance.
The mechanical property of 2 weld metal of table
As can be seen from Table 2, the weld metal obtained after submerged arc welding is carried out using the welding wire in above-described embodiment
Yield strength, the tensile property after 600 DEG C, persistently 3-4 hours still can keep 460MPa or more.Experimental data shows this
The welding wire of invention has higher room temperature and elevated temperature strength, preferable plasticity and preferable cracking resistance, every mechanical property
Can fire resisting high strength steel for building match, 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 antidetonation anti-corrosion fire-resistive construction structural steel grade gas shielded welding wires of 690MPa, which is characterized in that chemical element matter
Measuring degree is：C：0.02-0.14%, Si：0.41-1.00%, Cr：0-0.70%, Ni：1.00-3.50%, 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.
2. gas protecting welding wire according to claim 1, which is characterized in that controlling Al+S+P+O+N≤0.15%.
3. gas protecting welding wire according to claim 1, which is characterized in that the yield strength for being formed by weld metal is
469-592Mpa, tensile strength and be 538-661Mpa, elongation percentage A be 18-22%.Weld metal high-temperature yield strength is 463-
535MPa。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810838255.3A CN108788518A (en) | 2018-07-26 | 2018-07-26 | Antidetonation is anti-corrosion fire-resistive construction structural steel grade gas shielded welding wires of 690MPa |
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|---|---|---|---|
| CN201810838255.3A CN108788518A (en) | 2018-07-26 | 2018-07-26 | Antidetonation is anti-corrosion fire-resistive construction structural steel grade gas shielded welding wires of 690MPa |
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| CN108788518A true CN108788518A (en) | 2018-11-13 |
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| CN201810838255.3A Pending CN108788518A (en) | 2018-07-26 | 2018-07-26 | Antidetonation is anti-corrosion fire-resistive construction structural steel grade gas shielded welding wires of 690MPa |
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Cited By (6)
| 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 |
| CN110814568A (en) * | 2019-10-21 | 2020-02-21 | 东北大学 | High-toughness medium manganese steel gas shielded welding wire |
| CN110877168A (en) * | 2019-12-16 | 2020-03-13 | 钢铁研究总院 | 690 MPa-level gas shielded welding wire for anti-seismic, corrosion-resistant and fire-resistant building structural steel |
| CN113478119A (en) * | 2021-06-23 | 2021-10-08 | 南京钢铁股份有限公司 | 390 MPa-level all-position gas-shielded welding wire for secondary fire resistant building and manufacturing method thereof |
| CN113478120A (en) * | 2021-06-23 | 2021-10-08 | 南京钢铁股份有限公司 | 460 MPa-level all-position gas-shielded welding wire for secondary fire resistant building and manufacturing method thereof |
| CN114713940A (en) * | 2022-06-08 | 2022-07-08 | 江苏省沙钢钢铁研究院有限公司 | Weld joint formed on steel plate with yield strength of 400MPa |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN110814568A (en) * | 2019-10-21 | 2020-02-21 | 东北大学 | High-toughness medium manganese steel gas shielded welding wire |
| CN110814568B (en) * | 2019-10-21 | 2021-05-18 | 东北大学 | High-toughness medium manganese steel gas shielded welding wire |
| CN110877168A (en) * | 2019-12-16 | 2020-03-13 | 钢铁研究总院 | 690 MPa-level gas shielded welding wire for anti-seismic, corrosion-resistant and fire-resistant building structural steel |
| CN113478119A (en) * | 2021-06-23 | 2021-10-08 | 南京钢铁股份有限公司 | 390 MPa-level all-position gas-shielded welding wire for secondary fire resistant building and manufacturing method thereof |
| CN113478120A (en) * | 2021-06-23 | 2021-10-08 | 南京钢铁股份有限公司 | 460 MPa-level all-position gas-shielded welding wire for secondary fire resistant building and manufacturing method thereof |
| 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 |
| CN114713940A (en) * | 2022-06-08 | 2022-07-08 | 江苏省沙钢钢铁研究院有限公司 | Weld joint formed on steel plate with yield strength of 400MPa |
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