CN106624467A - Auxiliary welding rod of Q500QE steel suitable for bridge and preparation method thereof - Google Patents
Auxiliary welding rod of Q500QE steel suitable for bridge and preparation method thereof Download PDFInfo
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- CN106624467A CN106624467A CN201710122332.0A CN201710122332A CN106624467A CN 106624467 A CN106624467 A CN 106624467A CN 201710122332 A CN201710122332 A CN 201710122332A CN 106624467 A CN106624467 A CN 106624467A
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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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
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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
- B23K35/40—Making wire or rods for soldering or welding
Abstract
The invention discloses an auxiliary welding rod of Q500QE steel suitable for bridge and a preparation method thereof. The auxiliary welding rod is composed of a core wire and a coating wrapped on the surface of the core wire, the compositions and the content of the coating are, by weight, 300-400 parts of marble, 200-320 parts of fluorite, 30-100 parts of rutile, 4-7 parts of sodium carbonate, 1-5 parts of zircon sand, 150-350 parts of iron powder, 10-20 parts of electrolytic manganese, 10-40 parts of silica powder, 10-20 parts of cryolite powder, 5-10 parts of nickel powder, 2-5 parts of molybdenum powder, 5-10 parts of potassium titanate, and 5-10 parts of potassium fluosilicate. Compared with the prior art, the auxiliary welding rod is smooth in surface, high in yield, and stable in eccentricity.
Description
Technical field
The present invention relates to bridge field of welding material technology, more particularly to a kind of matching somebody with somebody with Q500QE steel suitable for bridge
Set welding rod, preparation method and welding method.
Background technology
China's steel bridge be in the People's Republic of China (PRC) after the founding of the state, abroad we are implemented with economy, the situation of blockade on new techniques
Under, what self-reliance was grown up.
Nineteen fifty-seven, by the technology and material of former Soviet Union expert, China builds and completes wuhan yangtze river non-major P.E.subject.
Overall length of bridge 1155.5m, main span 128m is realized first in " a bridge arch high over north and south, A deep chasm turns into a thoroughfare " on the Changjiang river.This is to grow
The First bridge built on river, is first milestone in Bridges in Our Country history.Steel used by the bridge are the A3 steel of Soviet Union's production
(i.e. Q235).
The sixties in 20th century, in order to connect Beijing-Shanghai Railway, decision builds Nanjing Yangtze River Bridge to replace Nanjing ferry.For solution
Certainly without the difficulty of low-alloy structural steel material, Anshan Iron and Steel Company succeeded in developing 16 manganese low-alloy high-strength bridge steels in 1962
(16Mnq), yield point σ s=340MPa, Nanjing bridge except small part is still with addition to the low-alloy steel of former Soviet Union's import, remaining whole
The steel of original import are instead of with domestic steel, at that time these steel were succeeded in developing, very inspiring, were referred to as " striving
Gas steel ".
Early 1970s, Jiujiang the Changjiang river rail-road road and bridge determine using domestic high strength steel build a seat height it is strong, light-duty,
Overall bolt welding structure scheme.But the difficulty faced using this scheme is a lot, and large span welded steel beam was not manufactured at that time
Material.The 16 manganese bridge steel that originally bridging is adopted, have not met the needs of manufacture large span welded steel bridge in material and specification.Cause
The thickness of slab effect of this steel is very big, and the intensity of steel, toughness decline quickly with the increase of thickness of slab, are built with 16 original manganese bridge steel
Bridge, railway single truss bridge maximum span is only possible to reach 112m.For this purpose, the Ministry of Railways and former Ministry of Metallurgical Industry determine 15 manganese of research and development
Vanadium nitrogen bridge steel (15MnVNq), its yield point is higher than 16 manganese bridge steels, σ s=420MPa.Due to smelting iron and steel and rolling at that time
Equipment falls behind, and alloying element is not complete, and research in more than 20 years is experienced in front and back.By substantial amounts of welding and mechanical property test and in north
Capital Miyun builds the engineering practice of Baihe test bridge, and 15 manganese vanadium nitrogen C level normalizing bridge steels have been produced in optimization.The thickness of slab of this steel
Effect is little, thickness of slab 56mm, and weldability and mechanical property are preferable.Jing scientific researches, design, the painstaking efforts of manufacturer, use in 1993
This steel has built up Jiujiang the Changjiang river public affairs railway bridge.Bridge steel bridge total length 1806m, main span is that the buckstay of 216m is flexible
Arch, structure is grand, and bridge shape is beautiful.
Early 1990s, railroad bridge construction faces the construction in Wuhu the Changjiang river, and main span is up to 312 meters.Bridge steel problem
Seem further prominent.Combine joint development LONG-SPAN RAILWAY bridge steel 14MnNbq for this bridge office and Wuhan Iron and Steel Plant.The steel is adopted
Carbon drop adds the metallurgical method of niobium and super clean, and is controlled rolling by the Microalloying Effect of niobium, it is ensured that yield strength σ
On the basis of s >=340MPa, with -4022 excellent low-temperature impact toughness.Simultaneously welding performance is also greatly improved, and solves plate
Thick effect problem, can in high volume supply 32-50mm steel plates.After Wuhu bridge is built, 14MnNbq steel meet railway bridge comprehensively
The needs that beam is built.Such as combined bridge -- the System for Wuhan Tianxingzhou Yangtze River Bridge maximum in the world for building up for 2009, it is adopted
Steel be exactly high tenacity, anti-slabbing 14MnNbq (Q345).
Into the new century since, Bridges in Our Country construction has new leap again.The across footpath of bridge continues to expand, and train passes through
Speed per hour is improved constantly.The especially construction of Beijing-Shanghai High-Speed Railway Nanjing Foundations of Dashengguan Changjiang River Bridge, is continuing with traditional 14MnNbq
Steel can not meet its design and construction requirement.For this purpose, Anshan iron and steel plant have developed high-performance bridge steel plate of new generation (Q345QE,
Q420QE, Q500QE, Q690QE), its toughness is further improved, and cool attenuation and welding heat affected zone hardness further drop
It is low, and with excellent atmospheric corrosion resistance.The series high-performance bridge steel plate, with good intensity and toughness, can carry
High bridge military service performance, reduces maintenance cost, meets urgent need of the domestic bridge construction to high-performance steel grade, its object performance level
The advanced level of international similar steel grade is reached.
Welding rod disclosed in prior art cannot be used for the welding of bridge Q500QE steel, and such as number of patent application is
201110310536.X discloses a kind of X70 grades pipe line steel arc welding electrode for welding, disclosure satisfy that with the welding rod tensile strength, punching
Hitting temperature can not meet, and its impact temperature is -20 DEG C, and the bridge welding requirements impact temperature of Q500QE steel is -40 DEG C, institute
So that the welding rod can not meet the welding of bridge Q500QE steel.Number of patent application discloses a kind of X80 for 200810046233.X
Grade steel oil, letter shoot manual welding welding rod, the welding rod tensile strength disclosure satisfy that impact temperature can not meet, its
Impact temperature is -10 DEG C, can not meet the welding of bridge Q500QE steel.
The content of the invention
An object of the present invention is that and provides a kind of supporting welding rod with suitable for bridge Q500QE steel, the welding rod
Surface is smooth, high yield rate, and bias is stable.
Technical scheme is：It is a kind of suitable for the bridge supporting welding rod of Q500QE steel, by core wire and wrap in core wire surface
Coating composition, coating composition and content are：The weight portion of marble 300～400, the weight portion of fluorite 200～320, rutile
30～100 weight portions, the weight portion of soda ash 4～7, the weight portion of zircon sand 1～5, the weight portion of iron powder 150～350, electrolytic manganese 10～20
Weight portion, the weight portion of silicon powder 10～40, the weight portion of oryolite 10～20, the weight portion of nickel powder 5～10 and the weight portion of molybdenum powder 2～5,
Potassium titanate 5-10 weight portions, potassium fluosilicate 5-10 weight portions.
Preferably, the weight portion of the marble 320～380, the weight portion of fluorite 250～300, the weight of rutile 50～80
Part, the weight portion of zircon sand 2～3, the weight portion of iron powder 200～330, the weight portion of electrolytic manganese 15～18, the weight portion of silicon powder 15～20,
The weight portion of oryolite 15～18, the weight portion of nickel powder 7～9, the weight portion of molybdenum powder 3～4, potassium titanate 6-8 weight portions, potassium fluosilicate 5.5-
8 weight portions.
Preferably, C 0.05-0.10wt%, Mn 0.05-0.20wt%, 0≤Si≤0.10wt%, 0≤S≤
0.015wt% and 0≤P≤0.015wt%, balance of Fe and impurity.
Preferably, the marble be 320 weight portions, fluorite be 300 weight portions, rutile be 50 weight portions, soda ash
For 5 weight portions, zircon sand is 2 weight portions, and iron powder is 200 weight portions, and electrolytic manganese is 15 weight portions, and silicon powder is 20 weight portions,
Oryolite be 15 weight portions, nickel powder be 7 weight portions, molybdenum powder be 3 weight portions, the weight portion of potassium titanate 6, the weight portion of potassium fluosilicate 8.
Preferably, the marble be 360 weight portions, fluorite be 280 weight portions, rutile be 80 weight portions, soda ash
For 5 weight portions, zircon sand is 2 weight portions, and iron powder is 300 weight portions, and electrolytic manganese is 18 weight portions, and silicon powder is 15 weight portions,
Oryolite be 12 weight portions, nickel powder be 7 weight portions, molybdenum powder be 3.5 weight portions, the weight portion of potassium titanate 7, the weight portion of potassium fluosilicate 7.
Preferably, the marble be 380 weight portions, fluorite be 250 weight portions, rutile be 60 weight portions, soda ash
For 5 weight portions, zircon sand is 2 weight portions, and iron powder is 330 weight portions, and electrolytic manganese is 18 weight portions, and silicon powder is 15 weight portions,
Oryolite be 18 weight portions, nickel powder be 8 weight portions, molybdenum powder be 4 weight portions, the weight portion of potassium titanate 8, the weight portion of potassium fluosilicate 5.5.
Preferably, in the marble, CaCO3>=96%, S≤0.03%, P≤0.03%, granularity require be：-
30 mesh：100%th, -40 mesh：>=97%, -170 mesh：≤ 70%；In fluorite, CaF2>=96%, SiO2≤ 3.0%, C≤0.08%,
S≤0.03%, P≤0.03%, granularity require be：- 30 mesh：100%th, -40 mesh：>=97%, -170 mesh：≤ 70%；Golden red
Shi Zhong, TiO2>=96%, S≤0.03%, P≤0.03%, granularity requirements are：- 40 mesh：>=100%, -160 mesh：≤ 30%；It is pure
In alkali, Na2CO3>=99%, NaCl≤0.70%, in zircon sand, ZrO2>=60%, SiO2≤ 32%, S≤0.03%, P≤
0.09%, granularity require be：- 40 mesh：100%th, -160 mesh：≤ 50%；In iron powder, Fe >=97.0%, Mn≤0.40%, Si
≤ 0.20%, C≤0.10%, S≤0.025%, P≤0.025%, granularity is required：- 30 mesh：100%；In electrolytic manganese, Mn >=
99.9%, granularity requires -60 mesh：100%；In silicon powder, SiO2>=98.0%, Fe2O3≤ 0.20%, S≤0.025%, P
≤ 0.025%；In oryolite, F：>=53%, Al >=13%, Na≤29, granularity requires -80 mesh：100%；In nickel powder, Ni >=
99.9%, granularity requires -60 mesh：100%；In molybdenum powder, Mo >=99.9%, granularity requires -60：100%；In potassium titanate,
TiO2>=60%, K2O >=30%, S≤0.05%, P≤0.05%, granularity is required：- 170 mesh：≤ 100%；In potassium fluosilicate,
K2SiF6>=98.0%, Pb≤0.05%, S≤0.025%, P≤0.025%, granularity is required：- 30 mesh：100%.
The second object of the present invention is to provide a kind of preparation method of the supporting welding rod suitable for bridge Q500QE steel.
Technical scheme is：It is a kind of suitable for the bridge preparation method of the supporting welding rod of Q500QE steel, comprise the following steps：
1. coating powder is mixed and is well mixed；
2. the binding agent for adding the 20-30% of coating total amount is uniformly mixed, and sends in bar press and is wrapped in weldering
On core；
3. welding rod is obtained Jing after 380～400 DEG C of the baking 2～3 hours of 80～100 DEG C of low temperature and high temperature are bakeed 1.5～2 hours.
The third object of the present invention is to provide a kind of welding method of bridge Q500QE steel.
Technical scheme is：A kind of bridge welding method of Q500QE steel, welding method weld(ing) deposit chemistry into
It is divided into (wt%)：C 0.01-0.10wt%, Mn 1.00-1.60wt%, 0≤Si≤0.60wt%, 0≤S≤0.015wt%, 0
≤ P≤0.020wt%, Ni 0.80-1.70wt% and Mo 0.10-0.40wt%, balance of Fe and impurity.
Preferably, the weld(ing) deposit is in the case of as-welded, the room temperature tensile of weld(ing) deposit mechanical property
Intensity Rm >=610Mpa, the strong Rp0.2 >=500MPa of room temperature yield, room temperature elongation A >=20%, -40 DEG C of ballistic work KV monodromes >=
60J；In the case of 620 DEG C of ± 15 DEG C of insulations 1 hour, room temperature tensile intensity Rm of weld(ing) deposit mechanical property >=
610Mpa, the strong Rp0.2 >=500MPa of room temperature yield, room temperature elongation A >=20%, -40 DEG C of ballistic work KV monodromes >=60J；It is described
The above-mentioned welding rod of welding method welding rod.
Inventive principle：Welding rod of the present invention by welding in each composition in the preparation and welding when be combined with each other, mutual shadow
Ring, reciprocation.
Beneficial effect：
The welding rod that the present invention is adopted passes through coating based on carbonate, fluoride and silicate, while addition is a small amount of containing
Titania starting material and improve extrusion material, under the comprehensive function of each constituent, welding rod function admirable, electrode surface light
Sliding, high yield rate, bias is stable；Arc stability when DC reverse connection is welded, substantially without splashing, the removability of slag is good, and welding rod is operational
Can excellent, all-position welding function admirable；Appearance of weld is attractive in appearance, and bead height is moderate, weld seam invade profit angle it is moderate, deposited metal reason
Change moderate performance.Arc stability, little, the de- slag that splashes are good during welding, forming, all positon good operation performance.The welding rod for being provided
It is mainly used in the welding of bridge Q500QE steel, weld(ing) deposit chemical Composition Control is strict, particularly the objectionable impurities such as S, P
Control of element is extremely low.
Welding rod of the present invention is the high-tenacity welding electrodes of the special basic coating of bearing device.All-position welding operating characteristics is good.
Deposited metal has good comprehensive mechanical property, and with good impact flexibility and cracking resistance.Suitable for bridge steel plate
Welding and respective strengths grade low-alloy steel structure welding.
Specific embodiment
With reference to specific embodiment, the present invention is further illustrated.
Embodiment 1
In the present embodiment, core wire chemical composition is (wt%)：C 0.05-0.10wt%, Mn 0.05-0.20wt%, Si≤
0.10wt%, S≤0.015wt%, P≤0.015wt%, balance of Fe and impurity.
In the present embodiment, when core wire is 1000g, coating constituent and content are (g)：Marble 320, fluorite 300,
Rutile 50, soda ash 5, zircon sand 2, iron powder 200, electrolytic manganese 15, silicon powder 20, oryolite 15, nickel powder 7, molybdenum powder 3.
After above-mentioned coating is well mixed, add the potassium-sodium water glass 250g that concentration is 43 ° to be uniformly mixed, send into bar
Wrapped according to a conventional method on the above-mentioned core wire of specification 4.0mm in press, then 88 DEG C of Jing low temperature bakees 2 hours, high temperature 380
DEG C bakee 1.5 hours, obtain final product the present embodiment welding rod.
Welding rod obtained by the present embodiment is carried out into soldering test, and (DC reverse connection is welded, and welding base metal is bridge Q500QE
Steel), arc stability, substantially without splash, the removability of slag can it is good, appearance of weld is attractive in appearance.
Deposited metal composition is：C：0.070wt%, Mn：1.25wt%, Si：0.25wt%, S：0.008wt%, P：
0.009wt%, Ni：1.51wt%, Mo：0.25wt%, balance of iron and impurity.
Deposited metal mechanical property such as table 1：
The welding rod deposited metal mechanical property of table 1
Embodiment 2
Embodiment core wire composition is same as Example 1.
In the present embodiment, when core wire is 1000g, coating constituent and content are (g)：Marble 360, fluorite 280,
Rutile 80, soda ash 5, zircon sand 2, iron powder 300, electrolytic manganese 18, silicon powder 15, oryolite 12, nickel powder 7, molybdenum powder 3.5.
After above-mentioned coating is well mixed, add the potassium-sodium water glass 250g that concentration is 43 ° to be uniformly mixed, send into bar
Wrapped according to a conventional method on specification 3.2mm core wire in press, then 88 DEG C of Jing low temperature bakees 2 hours, 380 DEG C of bakings of high temperature
1.5 hours, obtain final product the present embodiment welding rod.
Welding rod obtained by the present embodiment is carried out into soldering test, and (DC reverse connection is welded, and welding base metal is bridge Q500QE
Steel), arc stability, substantially without splash, the removability of slag can it is good, appearance of weld is attractive in appearance.
Deposited metal composition is：C：0.077wt%, Mn：1.35wt%, Si：0.20wt%, S：0.005wt%, P：
0.010wt%, Ni：1.50wt%, Mo：0.23wt%, balance of iron and impurity.
Deposited metal mechanical property such as table 2：
The welding rod deposited metal mechanical property of table 2
Embodiment 3
Embodiment core wire composition is same as Example 1.
In the present embodiment, when core wire is 1000g, coating constituent and content are (g)：Marble 380, fluorite 250,
Rutile 60, soda ash 5, zircon sand 2, iron powder 330, electrolytic manganese 18, silicon powder 15, oryolite 18, nickel powder 8, molybdenum powder 4.
After above-mentioned coating is well mixed, add the potassium-sodium water glass 250g that concentration is 43 ° to be uniformly mixed, send into bar
Wrapped according to a conventional method on specification 5.0mm core wire in press, then 88 DEG C of Jing low temperature bakees 2 hours, 380 DEG C of bakings of high temperature
1.5 hours, obtain final product the present embodiment welding rod.
Welding rod obtained by the present embodiment is carried out into soldering test, and (DC reverse connection is welded, and welding base metal is bridge Q500QE
Steel), arc stability, substantially without splash, the removability of slag can it is good, appearance of weld is attractive in appearance.
Deposited metal composition is：C：0.082wt%, Mn：1.31wt%, Si：0.23wt%, S：0.006wt%, P：
0.008wt%, Ni：1.55wt%, Mo：0.29wt%, balance of iron and impurity.
Welding rod deposited metal mechanical property such as table 3：
The welding rod deposited metal mechanical property of table 3
In the present invention, marble：CaCO3>=96%, S≤0.03%, P≤0.03%, granularity require be：- 30 mesh：
100%th, -40 mesh：>=97%, -170 mesh：≤ 70%；Fluorite：CaF2>=96%, SiO2≤ 3.0%, C≤0.08%, S≤
0.03%th, P≤0.03%, granularity require be：- 30 mesh：100%th, -40 mesh：>=97%, -170 mesh：≤ 70%；Rutile：
TiO2>=96%, S≤0.03%, P≤0.03%, granularity requirements are：- 40 mesh：>=100%, -160 mesh：≤ 30%；Soda ash：
Na2CO3>=99%, NaCl≤0.70%, zircon sand：ZrO2>=60%, SiO2≤ 32%, S≤0.03%, P≤0.09%,
Granularity requirements are：- 40 mesh：100%th, -160 mesh：≤ 50%；Iron powder：Fe >=97.0%, Mn≤0.40%, Si≤0.20%, C
≤ 0.10%, S≤0.025%, P≤0.025%, granularity is required：- 30 mesh：100%；Electrolytic manganese：Mn >=99.9%, particle
Degree requires -60 mesh：100%；Silicon powder：SiO2>=98.0%, Fe2O3≤ 0.20%, S≤0.025%, P≤0.025%；Ice crystal
Powder：F：>=53%, Al >=13%, Na≤29, granularity requires -80 mesh：100%；Nickel powder：Ni >=99.9%, granularity requirement-
60 mesh：100%；Molybdenum powder：Mo >=99.9%, granularity requires -60：100%.
In a word, presently preferred embodiments of the present invention, all equalizations made according to scope of the present invention patent be the foregoing is only
Change and modification, should all belong to the covering scope of patent of the present invention.
Claims (10)
1. it is a kind of to be made up of core wire and the coating wrapped in core wire surface suitable for the bridge supporting welding rod of Q500QE steel, should
Coating is constituted and content is：The weight portion of marble 300～400, the weight portion of fluorite 200～320, the weight portion of rutile 30～100,
The weight portion of soda ash 4～7, the weight portion of zircon sand 1～5, the weight portion of iron powder 150～350, the weight portion of electrolytic manganese 10～20, silicon powder
10～40 weight portions, the weight portion of oryolite 10～20, the weight portion of nickel powder 5～10 and the weight portion of molybdenum powder 2～5, potassium titanate 5-10 weights
Amount part, potassium fluosilicate 5-10 weight portions.
2. according to claim 1 suitable for the bridge supporting welding rod of Q500QE steel, it is characterised in that：The marble
320～380 weight portions, the weight portion of fluorite 250～300, the weight portion of rutile 50～80, the weight portion of zircon sand 2～3, iron powder 200
～330 weight portions, the weight portion of electrolytic manganese 15～18, the weight portion of silicon powder 15～20, the weight portion of oryolite 15～18, nickel powder 7～9
Weight portion, the weight portion of molybdenum powder 3～4, potassium titanate 6-8 weight portions, potassium fluosilicate 5.5-8 weight portions.
3. according to claim 1 and 2 suitable for the bridge supporting welding rod of Q500QE steel, it is characterised in that：The weldering
Core chemical composition is C 0.05-0.10wt%, Mn 0.05-0.20wt%, 0≤Si≤0.10wt%, 0≤S≤0.015wt%
With 0≤P≤0.015wt%, balance of Fe and impurity.
4. according to Claims 2 or 3 suitable for the bridge supporting welding rod of Q500QE steel, it is characterised in that：It is described big
Reason stone is 320 weight portions, and fluorite is 300 weight portions, and rutile is 50 weight portions, and soda ash is 5 weight portions, and zircon sand is 2 weight
Part, iron powder is 200 weight portions, and electrolytic manganese is 15 weight portions, and silicon powder is 20 weight portions, and oryolite is 15 weight portions, and nickel powder is 7
Weight portion, molybdenum powder be 3 weight portions, the weight portion of potassium titanate 6, the weight portion of potassium fluosilicate 8.
5. according to Claims 2 or 3 suitable for the bridge supporting welding rod of Q500QE steel, it is characterised in that：It is described big
Reason stone is 360 weight portions, and fluorite is 280 weight portions, and rutile is 80 weight portions, and soda ash is 5 weight portions, and zircon sand is 2 weight
Part, iron powder is 300 weight portions, and electrolytic manganese is 18 weight portions, and silicon powder is 15 weight portions, and oryolite is 12 weight portions, and nickel powder is 7
Weight portion, molybdenum powder be 3.5 weight portions, the weight portion of potassium titanate 7, the weight portion of potassium fluosilicate 7.
6. according to Claims 2 or 3 suitable for the bridge supporting welding rod of Q500QE steel, it is characterised in that：It is described big
Reason stone is 380 weight portions, and fluorite is 250 weight portions, and rutile is 60 weight portions, and soda ash is 5 weight portions, and zircon sand is 2 weight
Part, iron powder is 330 weight portions, and electrolytic manganese is 18 weight portions, and silicon powder is 15 weight portions, and oryolite is 18 weight portions, and nickel powder is 8
Weight portion, molybdenum powder be 4 weight portions, the weight portion of potassium titanate 8, the weight portion of potassium fluosilicate 5.5.
7. arbitrary described suitable for the bridge supporting welding rod of Q500QE steel according to claim 1-6, it is characterised in that：It is described
In marble, CaCO3>=96%, S≤0.03%, P≤0.03%, granularity require be：- 30 mesh：100%th, -40 mesh：≥
97%th, -170 mesh：≤ 70%；In fluorite, CaF2>=96%, SiO2≤ 3.0%, C≤0.08%, S≤0.03%, P≤
0.03%, granularity require be：- 30 mesh：100%th, -40 mesh：>=97%, -170 mesh：≤ 70%；In rutile, TiO2≥
96%th, S≤0.03%, P≤0.03%, granularity requirements are：- 40 mesh：>=100%, -160 mesh：≤ 30%；In soda ash, Na2CO3
>=99%, NaCl≤0.70%, in zircon sand, ZrO2>=60%, SiO2≤ 32%, S≤0.03%, P≤0.09%, granularity
Require be：- 40 mesh：100%th, -160 mesh：≤ 50%；In iron powder, Fe >=97.0%, Mn≤0.40%, Si≤0.20%, C≤
0.10%th, S≤0.025%, P≤0.025%, granularity is required：- 30 mesh：100%；In electrolytic manganese, Mn >=99.9%, particle
Degree requires -60 mesh：100%；In silicon powder, SiO2>=98.0%, Fe2O3≤ 0.20%, S≤0.025%, P≤0.025%；Ice
In crystalline flour, F：>=53%, Al >=13%, Na≤29, granularity requires -80 mesh：100%；In nickel powder, Ni >=99.9%, particle
Degree requires -60 mesh：100%；In molybdenum powder, Mo >=99.9%, granularity requires -60：100%；In potassium titanate, TiO2>=60%,
K2O >=30%, S≤0.05%, P≤0.05%, granularity is required：- 170 mesh：≤ 100%；In potassium fluosilicate, K2SiF6≥
98.0%, Pb≤0.05%, S≤0.025%, P≤0.025%, granularity is required：- 30 mesh：100%.
8. described in a kind of claim 1 to 7 any claim suitable for the bridge preparation of the supporting welding rod of Q500QE steel
Method, comprises the following steps：
1. coating powder is mixed and is well mixed；
2. the binding agent for adding the 20-30% of coating total amount is uniformly mixed, and sends in bar press and is wrapped on core wire；
3. welding rod is obtained Jing after 380～400 DEG C of the baking 2～3 hours of 80～100 DEG C of low temperature and high temperature are bakeed 1.5～2 hours.
9. a kind of bridge welding method of Q500QE steel, the welding method weld(ing) deposit chemical composition is (wt%)：C
0.01-0.10wt%, Mn 1.00-1.60wt%, 0≤Si≤0.60wt%, 0≤S≤0.015wt%, 0≤P≤
0.020wt%, Ni 0.80-1.70wt% and Mo 0.10-0.40wt%, balance of Fe and impurity.
10. the bridge according to claim 9 welding method of Q500QE steel, it is characterised in that：The weld deposit gold
Belong in the case of as-welded, the room temperature tensile intensity Rm >=610Mpa of weld(ing) deposit mechanical property, the strong Rp0.2 of room temperature yield >=
500MPa, room temperature elongation A >=20%, -40 DEG C of ballistic work KV monodromes >=60J；In the case of 1 hour being incubated at 620 DEG C ± 15 DEG C,
The room temperature tensile intensity Rm >=610Mpa of weld(ing) deposit mechanical property, the strong Rp0.2 >=500MPa of room temperature yield, room temperature elongation
Rate A >=20%, -40 DEG C of ballistic work KV monodromes >=60J；The welding method welding rod is using the arbitrary described weldering of claim 1-7
Bar.
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| CN112247395A (en) * | 2020-10-13 | 2021-01-22 | 四川大西洋焊接材料股份有限公司 | Composition, coating and Q690 coating-free bridge steel welding rod and preparation method thereof |
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| CN112247395B (en) * | 2020-10-13 | 2022-03-11 | 四川大西洋焊接材料股份有限公司 | Composition, coating and Q690 coating-free bridge steel welding rod and preparation method thereof |
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