CN106001987B - One kind exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application - Google Patents
One kind exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application Download PDFInfo
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- CN106001987B CN106001987B CN201610366752.9A CN201610366752A CN106001987B CN 106001987 B CN106001987 B CN 106001987B CN 201610366752 A CN201610366752 A CN 201610366752A CN 106001987 B CN106001987 B CN 106001987B
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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
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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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses one kind to exempt from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application, belongs to field of welding material, technical solution is：One kind exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application, and component includes base chemical composition Fe, and the welding wire further includes the chemical composition of following mass percent：C：0.03 ~ 0.10, Si：0.10 ~ 0.28, Mn：1.15 ~ 1.55, P≤0.012, S≤0.005, Cr：0.25 ~ 0.55, Ni：0.25 ~ 0.55, Cu：0.20 ~ 0.50, Ca：0.005 ~ 0.025, Re：0.005~0.05.Welding wire of the present invention is used for the welding of Q345qENH~Q460qENH series Weather-resistance bridge steel, and atmospheric corrosion resistance is excellent, and processing performance is good, stable quality, is adapted to large-scale promotion application.
Description
Technical field
The invention belongs to field of welding material, and in particular to one kind exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application, is applicable in
In the welding of weather-resistant steel plate, steel pipe, the welding that Q345qENH~Q460qENH series exempts from application Weather-resistance bridge steel is particularly suitable for.
Background technology
With the raising to requirements such as bridge security performance, performance, economic performance, environmental-protecting performance and endurance qualities,
Weather-proof steel bridge becomes an important development direction of high-performance bridge.The elements such as Cu, P, Cr, Ni in weathering steel are in alternation of wetting and drying
The surface protecting layer of densification is formed under environment, can prevent the deep development of corrosion, weather-proof welding wire is weather-proof steel bridge welding manufacture
When one of supplementary material for using of mandatory requirement, but domestic market not disclosure satisfy that the welding variety of demand, country's mark
There is no Weather-resistance bridge submerged arc welding wire for steel in standard.《Rail truck weather resisting steel and stainless steel welding material》（TB/T
2374-2008）III two kinds of TH500-NQ- III, TH550-NQ- weather-proof welding wire for submerged-arc welding, are adapted to rail truck specified in standard
The welding of weathering steel, the standard require deposited metal ballistic work to be not less than rolling stock steel standard, i.e. and AKV (- 40 DEG C) >=
60J.It is actual to use railway since railway vehicle dynamics and Weather-resistance bridge steel have differences in terms of chemical composition and mechanical property
When vehicle carries out the welding of Weather-resistance bridge steel with TH500-NQ- III or III welding wire for submerged-arc welding of TH550-NQ-, linker chemistry component and mechanics
Performance easily fluctuates, as connector ballistic work surplus capacity is small or even unqualified, weld seam chemical composition cannot stablize meet it is weather-proof
Requirement of the bridge steel to weather resistance, therefore TB/T 2374-2008 standard wldings are used, Weather-resistance bridge steel welded joint may
In the presence of corrosion weak area, become security risk.GB/T 714-2015《Structural steel for bridge》Standard require Weather-resistance bridge steel according to
The atmospheric corrosion resistance sex index that chemical composition calculates（Weather-proof index）I≥6.0.In environment complex area, exempt to apply to fully ensure that
Weather-proof steel bridge atmospheric corrosion resistance is filled, is strict with weather-proof index I >=6.5 of weathering steel.Develop matched weather-proof bury
Arc-welding material, is conducive to accelerate development and popularization and application that China exempts from the weather-proof steel bridge technology of application.
The elements such as Cr, Ni, Cu are added in welding wire, is improved to some extent, applies to its atmospheric corrosion resistance tool
The Chinese patent of numbers 200910061582.3,101537549 B of publication number CN, which disclose, " has the high intensity of weather resistance high
Toughness automatic submerged arc welding wire ", its component（Mass percent）In contain Cu：0.25 ~ 0.50%, Cr：0.20 ~ 0.50%, Ni：0.20~
0.60%；The Chinese patent of 100366375 C of application number 200410025569.X, publication number CN discloses a kind of " high-strength weathering
Welding wire for submerged-arc welding ", its component（Mass percent）In contain Cu：0.10 ~ 0.30%, Cr：0.40 ~ 1.20%, Ni：0.20~0.80%；Shen
Please numbers 201210122948.5, the Chinese patent of 102658440 A of publication number CN discloses that " a kind of rail truck is high anti-corrosion
The weather-proof welding wire for submerged-arc welding and wire rod of type ", its component（Mass percent）In contain Cu：0.10 ~ 0.25%, Cr：1.30 ~ 2.00%, Ni：
3.3 ~ 5.0%, Ti：0.02 ~ 0.10%, but above-mentioned welding wire still suffers from larger deficiency, research shows, different weather-proof of weather-proof index I
Its atmospheric corrosion resistance of steel has larger difference, when I is brought up between 6.5 ~ 6.9 from 6.0 ~ 6.3, its atmospheric corrosion resistance
1.5 times can be improved, exempts from weather-proof index I >=6.5 of application Weather-resistance bridge steel requirement, is welded according to common weather-proof welding wire, is welded
The atmospheric corrosion resistance in seam area will be less than steel plate mother metal, can become corrosion weak area in the actual environment, not meet and exempt from application
The design and manufacture requirement of weather-proof steel bridge, and above patent does not study the weather-proof index I calculated according to chemical composition；Separately
On the one hand, above patent does not consider influence of the alloying element excessively to welding pool mobility.Research shows, higher Cr, Ni
Content can improve the viscosity of welding pool, and Si elements form refractory oxide SiO in welding process2It is transitioned into weld seam
The mobility of welding pool can be reduced, influences appearance of weld performance and metallurgical quality.Welding pool mobility reduces, and hinders
The diffusion effusion of the gases such as nitrogen, hydrogen, carbon dioxide, improves weld seam and Jin Feng areas residual gas content, is unfavorable for weld porosity
The elimination of defect, it is also possible to cause hydrogen embrittlement and delayed crack.Molten bath mobility, which reduces, can also cause field trash in weld metal to contain
Amount rise, size increase, and influence the low-temperature impact toughness of welding point.Since mobility reduces, chemical composition cannot in molten bath
Uniformly diffusion, be easy to cause weld seam segregation or even triggers fire check, the above-mentioned 2 points applications for causing common weather-proof welding wire be subject to compared with
Big limitation, also brings difficult and challenge to the welding for exempting from the weather-proof steel bridge of application.
The content of the invention
The present invention is solves the technical problem of existing welding wire for submerged-arc welding weatherability difference, there is provided one kind exempts from the weather-proof steel bridge of application with resistance to
Welding wire for submerged-arc welding is waited, by adding Cr, Ni and Cu element in welding wire, and coordinates Ca and the rare earth of addition proper proportion etc. first at the same time
The technical solution of element so that prepared welding wire arc burning in welding process is stablized, and the droplet transfer is uniform, and welding bead is beautiful,
Processing performance is good, and atmospheric corrosion resistance is excellent, and metallurgical quality and weld seam comprehensive mechanical property effectively improve, suitable for exempting to apply
Fill the design and welding manufacture of Weather-resistance bridge steel construction.
The technical solution adopted by the present invention is：
One kind exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application, and component includes base chemical composition Fe, and the welding wire is also
Include the chemical composition of following mass percent：C：0.03 ~ 0.10, Si：0.10 ~ 0.28, Mn：1.15 ~ 1.55, P≤0.012, S
≤ 0.005, Cr：0.25 ~ 0.55, Ni：0.25 ~ 0.55, Cu：0.20 ~ 0.50, Ca：0.005 ~ 0.025, Re：0.005~0.05.
Preferably, the chemical composition mass percent of the welding wire is：C：0.03 ~ 0.10, Si：0.10 ~ 0.28, Mn：
1.15 ~ 1.55, P≤0.012, S≤0.005, Cr：0.25 ~ 0.55, Ni：0.25 ~ 0.55, Cu：0.20 ~ 0.50, Mo：0.02~
0.08, Ti：0.02 ~ 0.08, Ca：0.005 ~ 0.025, Re：0.005 ~ 0.05, surplus Fe.
Atmospheric corrosion resistance index I >=6.5 that the welding wire is calculated according to chemical composition, wherein：
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。
Proportioning in the welding wire between Si, Cr, Ni, Ca, Re content meets Ca+Re >=0.02 (Si+Cr+Ni).
The Re is Ce, La, Pr or Nd.
In above-mentioned technical proposal, the effect of each component and mechanism are as follows：
C：C is one of most strong alloying element of invigoration effect, as C content increases, can obtain higher tensile strength and
Hardness, but plasticity and toughness can be reduced substantially, deteriorate weldability, and when carbon content is excessive, the atmospheric corrosion resistance of steel is poor, this
Invention controls C content 0.03 ~ 0.10%.
Si：Si can form rich Si protective films in steel surface, refine alpha-feooh, so as to reduce the corrosion rate of steel, improve
Weather resistance, Si can obviously improve the obdurability of steel as one of main alloy element in steel within the specific limits, but with Si
Content increase, the toughness of steel is in the trend that reduces afterwards is first increased, and the present invention controls Si contents 0.10 ~ 0.28%, when Si contents are big
Toughness is harmful to when 0.28%.
Mn：Mn can play the role of desulfurization, deoxidation, can prevent hot-short and fire check generation, while have stronger
The control of Mn contents 1.15 ~ 1.55%, can be improved intensity but also improve toughness by solution strengthening effect and quenching degree, the present invention.
S and P：S and Fe can form low melting point eutectic, cause plasticity and impact flexibility hot-short, while that reduce weld seam, deteriorate
Atmospheric corrosion resistance；The segregation effect of P is very strong, and P content is excessive easily to cause hot tearing, and phosphide is hard and crisp in itself, easily makes
Cheng Gang's is cold short, reduces the plasticity and toughness of steel.The present invention controls S, P content in S≤0.005%, P≤0.012% respectively.
Cr：Cr elements are enriched in matrix surface in the corrosion process of steel, form siderochrome multi-element alloy oxide, filling rust
The micro-crack of layer and cavity, increase rusty scale consistency, improve atmospheric corrosion resistance, it is strong that the additions of Cr elements can improve weld seam
Degree, but when its content is higher, the low-temperature flexibility and molten bath mobility of weld seam can be drastically reduced, be unfavorable for gas in weld metal and folder
Miscellaneous exclusion, influences weld seam metallurgical quality, and the control of Cr contents 0.25 ~ 0.55%, had both been ensured the resistance to big of weld metal by the present invention
Gas corrosion performance and intensity, and reduction mobility more by a small margin.
Ni：The addition of Ni makes rusty scale crystallization attenuate, and makes γ-FeOOH be more easy to be transformed into stable alpha-feooh, suppresses Cl-、S
Intrusion, improve the atmospheric corrosion resistance of steel.Ni with fining ferrite grains, can improve the low-temperature impact toughness of steel.But Ni
Too high levels can increase welding pool viscosity, reduce mobility, be unfavorable for the exclusion of pernicious gas and non-metallic inclusion, Ni is also
It is noble element, should not adds, the present invention controls Ni contents 0.25 ~ 0.55%.
Cu：Cu is enriched in the oxide layer that surface forms densification in the corrosion process of steel, improves FeOOH nucleation rates, makes interior
Rusty scale crystal grain is more tiny, fine and close, improves the atmospheric corrosion resistance of steel.Cu is precipitation-strengthening element, within the specific limits may be used
Improve the intensity and toughness of weld seam, but Cu too high levels can increase weld seam hot cracking tendency, the present invention by the control of Cu contents 0.20 ~
0.50%。
Ca：Ca can form calciate with refractory metal, reduce welding pool viscosity, improve molten bath mobility, add
Micro Ca elements, can make field trash refinement and dispersion containing Ca, cold cracking is reduced while improving weld seam low-temperature impact toughness
Tendency, the present invention control Ca contents 0.005 ~ 0.025%.
Re：Re, that is, rare earth element, preferentially selects Ce, La, Pr or Nd, micro Re elements are added in welding wire can be effective
Reduce oxide, nitride, sulfide etc. and be mingled with content, change inclusion morphology, reduce weld seam hydrogen induced cracking sensitiveness, at the same time
Re elements can improve welding pool mobility, further reduce gas in weld metal and be mingled with content, improve weld seam metallurgical quality.
The present invention controls Re contents 0.005 ~ 0.05%.
In further improved technical solution, Mo and Ti, Mo are added：Rusty scale knot can be improved by being properly added Mo elements
Structure, increases rusty scale compactness, improves the atmospheric corrosion resistance of steel.Mo can expand Bainite Region, improve weld seam obdurability, but
Mo is noble element, should not be added.The present invention controls Mo contents 0.02 ~ 0.08%.
Ti：Ti chemical properties are active, easily react to form second phase particles with carbon nitrogen, crystal grain thinning.But Ti elements
Too high levels can reduce weld seam low-temperature flexibility, therefore the control of Ti contents is 0.02 ~ 0.08%.
The present invention welding wire from above-mentioned each chemical composition scientific matching, it is mutually coordinated, common with, pass through C, Si, Mn etc.
The solution strengthening effect of alloying element, has been effectively ensured the intensity of weld metal, is acted on by the toughening of Ni elements, Ti elements
Refined crystalline strengthening and precipitation strength effect, control P, S constituent content, further increase the obdurability of weld metal.Pass through addition
The alloying elements such as Si, Cu, Cr, Ni, can improve the compactness and stability of weld metal rusty scale, ensure the weather-proof of weld metal
Performance.The reasonable addition of above alloying element so that the mechanical property of weld metal, weather resistance etc. are all more excellent.In order to
Give full play to Ca, Re element improve molten bath mobility, improve the effect of metallurgical quality, it is necessary to add Ca, Re at the same time, further with
The welding wire performance that proportioning between Si, Cr, Ni, Ca, Re content meets the requirement of Ca+Re >=0.02 (Si+Cr+Ni) is more excellent
It is different.The welding wire of the present invention is suitable for the welding that Q345qENH~Q460qENH series exempts from application Weather-resistance bridge steel, and deposited metal is resistance to
Atmospheric corrosion index I >=6.5, atmospheric corrosion resistance is excellent, and relatively common weather-proof wlding deposited metal improves 1.5 times, weld seam gold
Belong to and exempt from relatively corrosive rate≤10% of application weathering steel mother metal, disclosure satisfy that the matching welding for exempting from application weathering steel uses and wanted
Ask, molten bath mobility is preferable during welding, and welding point metallurgical quality is excellent, the neighbouring flawless of weld dimensions,
The defects of stomata, slag inclusion, overlap, burn-through.
The beneficial effects of the invention are as follows：（1）The welding wire of the present invention is exempting from application for Q345qENH~Q460qENH series
During the welding of Weather-resistance bridge steel, deposited metal tensile strength >=500MPa, yield strength >=345MPa, elongation >=24%, -40
DEG C low-temperature impact workKV 2≥100J.（2）The present invention welding wire deposited metal atmospheric corrosion resistance index I >=6.5, weld metal with
Exempt from relatively corrosive rate≤10% of application weathering steel mother metal, atmospheric corrosion resistance is excellent, suitable for exempting from application Weather-resistance bridge steel knot
The design and welding manufacture of structure.（3）The welding procedure of the present invention is good, and arc burning is stablized in welding process, molten drop mistake
Cross uniformly, welding bead is beautiful, and weld seam and the transition of mother metal junction are uniform, and appearance of weld is good.（4）The welding wire of the present invention is in welding
During molten bath mobility it is preferable, welding point metallurgical quality is excellent, weld dimensions nearby flawless, stomata, slag inclusion,
The defects of overlap, burn-through.（5）The soldering wire alloy system regulation and control of the present invention are reasonable, the smelting of its wire rod, rolling and drawing welding wire technique
Easy to implement, stable quality, is adapted to large-scale promotion application.
Brief description of the drawings
The pattern of typical field trash in the deposited metal that Fig. 1 is formed by 5 welding wire of the embodiment of the present invention；
The pattern of typical field trash in the deposited metal that Fig. 2 is formed by 1 welding wire of comparative example；
Fig. 3 is the deposited metal typical organization pattern that welding wire embodiment 1 of the present invention is formed；
Fig. 4 is the deposited metal typical organization pattern that 2 welding wire of comparative example is formed；
Fig. 5 is the deposited metal Typical Corrosion Appearance formed in welding wire embodiment 3 of the present invention；
Fig. 6 is the deposited metal Typical Corrosion Appearance that 3 welding wire of comparative example is formed.
Embodiment
The present invention provides one kind and exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application, its chemical composition proportioning example is shown in Table 1, root
Matched according to the component of weld wire that accurately calculates, select P, S, gas and the low raw material of inclusion content, calculate the addition of alloy,
Steel for welding wire is smelted using 50Kg vacuum induction furnaces, after feeding, melt, refine, Ca and Re is added in alloying
Deng active element alloy, steel ingot is cast into after component qualification.After steel ingot is forged into square billet, Φ 5.5mm wire rods, wire rod warp are rolled into
Peel off, clean, after cathodic pickling, cleaning and boronation, then the welding wire of 2.0~5.0mm of Φ, welding wire are made through rough silk and finish draw silk
Stable quality, further carries out welding wire surface copper facing using the method for electroless copper, and copper facing thickness control is at 0.2 ~ 0.3 μm, weldering
Silk copper coating is not counted in component of weld wire calculating.The chemical composition of the specific embodiment of welding wire of the present invention and three kinds of comparative example welding wires
Proportioning（Mass percent）And its weather-proof index I is as shown in table 1 below, wherein specification refers to the specification of diameter.
1 welding wire chemical composition of table matches（Mass percent）（Surplus is Fe）
In above-mentioned table 1, embodiment 1-7 is that the chemical composition of welding wire of the present invention matches example, and comparative example 1-3 is common weather-proof
Steel welding wire TH550-NQ- III, the calculation basis above-mentioned formula of weather-proof index I, such as the weather-proof index I=26.01 (% of embodiment 1
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=26.01×0.39+3.88×0.48+1.20×0.52+1.49×0.18+17.28×0.010-7.29×
0.39 × 0.48-9.10 × 0.48 × 0.010-33.39 × 0.39 × 0.39=6.58, from upper table as it can be seen that welding wire of the present invention
Weather-proof index I contrasts the weather-proof index I of welding wire in the range of 6.05 ~ 6.27 in the range of 6.51 ~ 6.71.
Above-mentioned welding wire is exempted to the welding of application Weather-resistance bridge steel for Q345qENH~Q460qENH series, test plate (panel), which is selected, exempts from
Application weather-proof steel bridge 24mm thickness Q420qENH steel plates, deposited metal welding examination is carried out according to the welding condition of such as table 2 below
Test, the chemical composition of above-mentioned test plate (panel) includes：C 0.07%, Si 0.32%, Mn 1.16%, P 0.011%, S 0.002%, Cr
0.43%, Ni 0.35%, Cu 0.31%, the weather-proof index I of the test plate (panel) is 6.57, yield strengthR p0.2For 459MPa, tensile strengthR mFor 617MPa, elongation percentage 25%, -40 DEG C of ballistic worksKV 2For 273J.Visual examination, ultrasonic examination are carried out after test plate (panel) welding
After the assay was approved, sample, deposited metal composition is measured, using the welding wire of 1 each embodiment of table from each deposited metal
Corresponding deposited metal composition measurement result and its weather-proof index I such as table 3 below institutes calculated according to chemical composition after welding
Show, sampled from each deposited metal, the form and content of observation statistics field trash, and grade to field trash, rating result see the table below
4。
Wherein, in the deposited metal that the welding wire of the embodiment of the present invention 5 is formed typical field trash pattern as shown in Figure 1,
The pattern of typical field trash is as shown in Fig. 2, explanation welding wire deposited metal of the present invention in the deposited metal that 1 welding wire of comparative example is formed
Middle inclusion content is less, and field trash type is carefully spherical oxide for D classes；It is opposite to contrast welding wire deposited metal inclusion content
It is more, it is slightly spherical oxide there are D classes.
The deposited metal typical organization pattern that the welding wire of welding wire embodiment 1 of the present invention is formed is as shown in figure 3, comparative example 2
The deposited metal typical organization pattern that welding wire is formed is as shown in figure 4, explanation welding wire deposited metal organization type of the present invention is main
For tiny acicular ferrite structure, pearlite and granular bainite content are few, and welding wire deposited metal of the present invention has excellent
Low-temperature flexibility；Contrast welding wire deposited metal organization type is acicular ferrite+ferrite side plate, the low temperature of its deposited metal
Impact flexibility is relatively low.
The deposited metal Typical Corrosion Appearance that the welding wire of the embodiment of the present invention 3 is formed is as shown in figure 5, the weldering of comparative example 3
The deposited metal Typical Corrosion Appearance that silk is formed is as shown in fig. 6, the rusty scale densification that explanation welding wire deposited metal of the present invention is formed
And stablize, atmospheric corrosion resistance is excellent；Contrast welding wire deposited metal rusty scale has blind crack, not as welding wire deposition of the present invention gold
It is fine and close to belong to rusty scale, therefore welding wire of the present invention has more preferable atmospheric corrosion resistance.
2 welding condition of table
Deposited metal composition and weather-proof index I after each embodiment welding wire welds in 3 table 1 of table
Deposited metal field trash is graded after each embodiment welding wire welding in 4 table 1 of table
Analyzed by 3 deposited metal composition measurement result of table as it can be seen that the weather-proof index I of embodiment 1-7 deposited metals is equal
Higher than 6.5, atmospheric corrosion resistance is excellent, and P, S content are controlled in deposited metal contains one in reduced levels, deposited metal
Quantitative Ca and Re elements, advantageously reduce the field trash and air vent content of deposited metal, ensure deposited metal metallurgical quality and
Mechanical property.The weather-proof index I of comparative example 1-3 deposited metals is below 6.5, and atmospheric corrosion resistance is not as good as welding wire of the present invention
Deposited metal.Without Ca and Re elements in comparative example 1-3 deposited metals, deposited metal mobility can not be effectively improved and ensure deposition
Metal metallurgy smelting quality.
Inclusion content is less in welding wire deposited metal of the present invention it can be seen from 4 rating result of upper table, field trash type
It is carefully spherical oxide for D classes；Inclusion content is relatively more in contrast welding wire deposited metal, mainly has sulfide-based（A classes）、
Silicates（C classes）With spherical oxide class（D classes）.Illustrate welding wire of the present invention by adding Ca and rare earth element, hence it is evident that to improve
Deposited metal metallurgical quality, is conducive to the raising of welding point low-temperature flexibility.
From the deposited metal sampling after welding, tensile property is carried out after flaw detection is qualified and -40 DEG C of low temperature impact properties are tested.
Tensile sample is longitudinally intercepted from deposited metal center, it is ensured that parallel length is all made of deposited metal, specimen size and experiment
Method is carried out with reference to the regulations of GB/T 228.Impact specimen is intercepted from deposited metal center, and the impact specimen longitudinal axis is grown with deposited metal
Degree direction is vertical, and notch face is located at deposited metal center perpendicular to deposited metal surface, notch axis.Specimen size is 10 × 10
× 55mm, impact test method are performed with reference to the regulations of GB/T 229.Deposited metal tension test and the Impulse Test Result such as institute of table 5
Show, be average value in table bracket.
Deposited metal tensile property and impact property measurement result after 5 table of table, 1 each embodiment welding wire welding
For the deposited metal yield strength of welding wire of the present invention in the range of 386 ~ 535MPa, tension is strong it can be seen from upper table 5
Degree is in the range of 538 ~ 639MPa, and elongation percentage is in the range of 23.5 ~ 28.0%, and ballistic work is in the range of 108 ~ 158J, comprehensive mechanics
Excellent performance, matches well with mother metal obdurability, meets associated specifications and surplus capacity is larger.Selected contrast welding wire melts
Metallisation yield strength in the range of 458 ~ 469MPa, tensile strength in the range of 575 ~ 617MPa, elongation percentage 22.0 ~
In the range of 24.0%, ballistic work is in the range of 38 ~ 69J.The deposited metal intensity of contrast welding wire can meet the requirement of mother metal standard, but
Ballistic work is relatively low and fluctuation is larger, it is impossible to meets requirement of the Weather-resistance bridge steel to low-temperature flexibility, it is seen that with common weather-proof welding wire
Compare, the comprehensive mechanical property of welding wire of the present invention has a clear superiority.
Sampled from weld metal, with reference to TB 2375-1993《Railway weathering steel alternate-immersion test method》And TB
2374-2008《Rail truck weather resisting steel and stainless steel welding material》Standard, using the NaHSO of 0.01mol/L3It is molten
Liquid carries out period soaking corrosion accelerated corrosion experiment, simulates the corrosion behavior under industrial atmospheric environment.According to relatively corrosive rate（It is relatively rotten
Erosion rate=∣（Mother metal weightlessness-weld metal is weightless）/ mother metal Shi Chong ∣）To evaluate the air corrosion resistance of weld metal, experiment knot
Fruit see the table below 6.
The air corrosion resistance result of the test of 6 weld metal of table
It can be seen from upper table 6 under the conditions of industrial atmospheric environment is simulated, the weld metal and weathering steel of welding wire of the present invention
The relatively corrosive rate of mother metal meets that TB 2374-2008 standards want relatively corrosive rate no more than 10% in the range of 2% ~ 3%
Ask, illustrate that the atmospheric corrosion resistance of weather-proof welding wire weld metal of the present invention is suitable with mother metal, there is excellent atmospheric corrosion resistance
Performance.The weld metal of welding wire and the relatively corrosive rate of weathering steel mother metal are contrasted in the range of 14 ~ 16%, beyond standard requirement, is said
Bright when exempting from application bridge weathering steel and using general weather-proof welding wire welding, the atmospheric corrosion resistance of weld metal is compared with mother metal
Difference, weld metal zone may become the weak area of corrosion under the actual service condition of bridge.Compared with general weather-proof welding wire, the present invention
The atmospheric corrosion resistance of welding wire has a clear superiority.
The welding wire of the present invention can be used for the welding of 345~460MPa grades of steel plates of yield strength, and welding procedure is good, weldering
The metallurgical quality and comprehensive mechanical property of connector are excellent, meet《Railway steel bridge manufacturing standard》（Q/CR9211-2015）It is required that
Weld metal atmospheric corrosion resistance index I >=6.5, atmospheric corrosion resistance are matched well with exempting from application bridge with weathering steel.The present invention
Welding wire disclosure satisfy that exempts from the weather-proof steel bridge structure design of application and manufacture requirement, can also be generalized to rail truck, building structure,
Other weathering steel fields such as container use.
Claims (4)
1. one kind exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application, component includes base chemical composition Fe, it is characterised in that institute
State the chemical composition that welding wire further includes following mass percent：C：0.03 ~ 0.10, Si：0.10 ~ 0.28, Mn：1.15 ~ 1.55, P
≤ 0.012, S≤0.005, Cr：0.25 ~ 0.55, Ni：0.25 ~ 0.55, Cu：0.20 ~ 0.50, Ca：0.005 ~ 0.025, Re：
0.005 ~ 0.05, atmospheric corrosion resistance index I >=6.5 that the welding wire is calculated according to chemical composition, wherein：
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。
2. one kind according to claim 1 exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application, it is characterised in that the welding wire
Chemical composition mass percent be：C：0.03 ~ 0.10, Si：0.10 ~ 0.28, Mn：1.15 ~ 1.55, P≤0.012, S≤
0.005, Cr：0.25 ~ 0.55, Ni：0.25 ~ 0.55, Cu：0.20 ~ 0.50, Mo：0.02 ~ 0.08, Ti：0.02 ~ 0.08, Ca：
0.005 ~ 0.025, Re：0.005 ~ 0.05, surplus Fe.
3. one kind according to claim 1 exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application, it is characterised in that the welding wire
Proportioning between middle Si, Cr, Ni, Ca, Re content meets Ca+Re >=0.02 (Si+Cr+Ni).
4. one kind according to claim 1 exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application, it is characterised in that the Re is
Ce, La, Pr or Nd.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610366752.9A CN106001987B (en) | 2016-05-30 | 2016-05-30 | One kind exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610366752.9A CN106001987B (en) | 2016-05-30 | 2016-05-30 | One kind exempts from the weather-proof welding wire for submerged-arc welding of the weather-proof steel bridge of application |
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| CN106001987A CN106001987A (en) | 2016-10-12 |
| CN106001987B true CN106001987B (en) | 2018-05-08 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106956064A (en) * | 2017-03-27 | 2017-07-18 | 中铁宝桥集团有限公司 | A kind of Steel Bridge Q420qENH exempts from the welding method of application weathering steel |
| CN106944764B (en) * | 2017-05-19 | 2020-05-12 | 哈焊所华通（常州）焊业股份有限公司 | High-performance corrosion-resistant submerged-arc welding material for bridge |
| CN108994483B (en) * | 2018-09-21 | 2021-04-06 | 常熟理工学院 | Heat-treatment-resistant low-alloy submerged arc welding wire for deposited metal |
| CN109719417A (en) * | 2018-12-20 | 2019-05-07 | 天津市永昌焊丝有限公司 | A kind of up to 55kg gas shielded welding of weathering steel steel welding wire |
| CN111673313A (en) * | 2020-06-04 | 2020-09-18 | 江苏省沙钢钢铁研究院有限公司 | Gas shielded welding wire with fire-resistant and weather-resistant characteristics |
| CN111975245B (en) * | 2020-09-02 | 2021-07-27 | 燕山大学 | Coating-free weather-proof submerged arc automatic welding wire with 650 MPa-level tensile strength for steel bridge and wire rod |
| CN112372118B (en) * | 2020-12-09 | 2022-03-01 | 南京钢铁股份有限公司 | Submerged arc welding method for low-Mo refractory steel |
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| CN106001987A (en) | 2016-10-12 |
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