CN101318276B - Solid-core welding wire for carbon dioxide gas protection arc welding - Google Patents
Solid-core welding wire for carbon dioxide gas protection arc welding Download PDFInfo
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- CN101318276B CN101318276B CN2008100962805A CN200810096280A CN101318276B CN 101318276 B CN101318276 B CN 101318276B CN 2008100962805 A CN2008100962805 A CN 2008100962805A CN 200810096280 A CN200810096280 A CN 200810096280A CN 101318276 B CN101318276 B CN 101318276B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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Abstract
The present invention relates to a carbon dioxide gas shielded arc welding which uses solid cored welding wire and is characterized in that the components and weight ratio of each component are showed as follows : C: 0.020 to 0.070 wt%; Si: 0.70 to 1.10 wt%; Mn: 1.50 to 1.74 wt%; P: 0.005 to 0.018 wt%; S: less than 0.010 wt%; Ti: 0.18 to 0.30 wt%; B: 0.0015 to 0.0060 wt%; Mo: less than 0.08 wt%; O: less than 0.0100 wt%; Cu (the plating amount exists when the surface is coated with copper): less than 0.45 wt%; and the balance Fe with inevitable impurities, and if a parameter XW (%) is defined by XW=C+Si/24+Mn/6+B*30 based on the contents of C, Si, Mn and B, the XW is in the range of 0.380 to 0.600. With such a composition, the solid wire for the CO2 gas shielded arc welding has high practicality as 540N / mm<2> class wire(=YGW18), obtains a welding unit with a superior intensity and toughness, and has appropriate stripping performance with appropriate quantity of slag.
Description
Technical field
The present invention relates to mild steel or 490～520N/mm
2The level high-tensile steel is a high efficiency when carrying out shield carbon-dioxide arc welding, and can access the solid-core welding wire for carbon dioxide gas protection arc welding of the weld metal of mechanical performance excellence.
Background technology
Recently, in the building iron field, with carbon dioxide (CO
2) use because of the advantage of its efficientibility is used as the main force for the gas shielded arc welding connection of protective gas.Aspect welding quality, the performance that realizes welded-joint in order to rise to emphasis with vibration strength improves, construction standard description JASS6 in 1996 revises, and during building standard method in 1999 revised, temperature had been stipulated upper limit management between the input heat energy during to welding, road.Be subjected to the influence of this trend, welding wire also develop with high heat energy input, high road between the corresponding welding wire of temperature, it is for 490N/mm
2Grade steel plate can allow to reach maximum input heat energy 40kJ/cm, and temperature is 350 ℃ between the road, perhaps for 520N/mm
2Grade steel plate can allow to reach maximum input heat energy 30kJ/cm, and temperature is 250 ℃ between the road, in 1999 as 540N/mm
2Level is by JISization.After, up to now compared with existing welding wire, even under temperature between higher input heat energy, higher road, still can access the 540N/mm of the performance of excellent machinery
2The level welding wire is popularized rapidly.Particularly different with robot welding, in the field of importing the semi-automatic welding temperature treatment difficulty, that need be undertaken by staff between heat energy, road, the 540N/mm of the allowed band broadness of heat management
2The level welding wire universal surprising.
Carbon dioxide gas arc welding as exploitation up to now connects with temperature correspondence welding wire between big electric current, high road, be disclosed in the spy open flat 10-230387 number, spy open flat 11-90678 number, spy open 2001-287086 number, spy open 2002-321087 number, spy open 2002-346789 number, spy open 2002-79395 number, spy open 2002-103082 number, spy open 2003-119550 number, spy open 2003-136281 number, spy open 2004-202572 number, spy open 2004-237361 number, the spy opens 2004-98143 number and the spy opens in 2006-289395 number.
They are characterised in that, contain Si, Mn, the such deoxidation composition of Ti more than existing welding wire all sidedly, and are added with Mo, B, Cr, Al, Nb, V, Ni etc. as required.Thus, improved the hardenability of steel, and the crystal grain miniaturization brings the raising of toughness, also improved intensity by the effect associating that makes precipitation-hardening and solution hardening in addition.This welding wire is big more to groove width, and the steel plate effect that the thickness of slab that temperature is high more between the road is big more is remarkable more.
Imported the channel temp management originally in the steel building industry, and,,, also can utilize pneumatic shovel instruments such as (chipper) to carry out slag calmly and remove even there is slag to pile up then to the cooling meeting generation stand-by period as if the temperature of arrival regulation.Therefore, the 540N/mm that develops up to now
2The carbon dioxide gas arc welding of level connects with the corresponding welding wire of temperature between big electric current, high road, does not include the fissility of slag in consideration.But a weld job person will take on a plurality of welding points simultaneously in recent years, if arrive the temperature of regulation, then will move to other welding points and weld, and the previous gimmick that is cooled so therebetween that is welded on is developed, is popularized.Like this if the stand-by period major part disappears, a large amount of slag generating capacities and the abominable fissility thereof that then are not regarded as the corresponding welding wire of temperature between the big electric current of problem, high road up to now make the efficient reduction be used as great problem and begin to obtain understanding always.Therefore, in order to address this problem, just occurred developing to the expectation of high efficiency welding wire and to it, this welding wire has 490N/mm under the condition of 350 ℃ of temperature between maximum input heat energy 40kJ/cm, the highest road
2The performance of the needed sufficient machinery of level steel perhaps has 520N/mm under the condition of 250 ℃ of temperature between maximum input heat energy 30kJ/cm, the highest road
2The performance of the needed sufficient machinery of level steel, and the good such additional properties of fissility of having given slag.
But, nearest and 540N/mm
2Popularizing of level welding wire further proposes new hope together.
As stating, the corresponding welding wire of temperature is remarkable more to the big more steel plate effect of thickness of slab between high input heat energy road.Therefore be divided into, in the following relatively thinner thickness of slab of the 20mm that temperature is all not too high between former input heat energy and road,, thought the 490N/mm that in the past always used from the viewpoint of cost
2Level=YGWII fully satisfies the demand and can be suitable for, and thickness of slab then uses 540N/mm when thick
2Level=YGW18, still, recently owing to the exchange trouble, because of 540N/mm
2The universal welding wire cost and the 490N/mm of causing of level welding wire
2The difference of level is dwindled, and Architectural Structure Design person adds the reason through high strength sensing etc. under the viewpoint that vibration strength improves, and the steel plate of thin plate has also been used 540N/mm natch
2The level welding wire.But, just produced 2 problems thus.
First problem points is, because the groove area is little, so existence input heat energy only can rise to the situation about 25kJ/cm, and because number of weld passes is also few, so temperature only just can finish welding between the road before rising to about 200 ℃.In other words, become the superfluous condition of cooling velocity of temperature between low input heat energy, low road, at 540N/mm up to now
2In the level welding wire, do not have the state miniaturization down of ferritic structure, but generation is to the tissue inter-variable of bainite or martensitic structure, toughness step-down on the contrary.
Second problem points is that the mother metal dilution rate relativity ground that causes liner plate rises because the groove area diminishes, thereby is subjected to the influence of its tissue easily.Now, liner plate is pursued low price and is used the many inferior steel plates of nitrogen content mostly, because the increase of the nitrogen content in the weld metal causes the toughness reduction.
In addition, about the slag fissility, in robot welding, with respect to the slag fissility is preferred condition well, in the semi-automatic welding by staff, superfluous slag fissility fiercely splashes when slag is peeled off in the eye that is splashed into the operator easily etc., therefore also becomes problem.
In addition we know, about the slag amount, reduce also has problem superfluously.Semi-automatic welding, because the person-to-person difference of technology level of operator is big, the welding person that technical merit is low uses high welding current, carry out superfluous teeter (weaving), or superfluous the reasons such as welding capacity that increase per 1 welding bead, cause the protective in molten bath to worsen, the gas hole defect of bubble etc. is produced.Therefore, if reduce the slag amount superfluously, then the molten bath can't be subjected to the protection of slag, is exposed to the open air in gas atmosphere, and protective reduces, and further makes also hole defect deterioration of gasproof.Therefore, not only difference of technology level is influential to the molten bath, and is subjected to the influence of wind to the molten bath easily.
Based on this background, the expectation exploitation can be reached the welding wire of following condition.
(1) has as being adapted at mild steel or 490N/mm
2To 520N/mm
2The 540N/mm that the level high tension steel uses when carrying out shield carbon-dioxide arc welding
2Level welding wire (the character of=YGW18) basic machinery.
Certainly much less, even also be not subjected to the influence of the composition of liner plate material when thin, the intensity and the toughness of weld part were good when (2) thickness of slab was thick.
(3) in semi-automatic welding is used,, make the fissility appropriateness of slag from the viewpoint of welding efficiency (the good more efficient of fissility is high more) and safety (fissility is poor more safe more).
(4) can not make the amount appropriateness of slag in this way because of the performance to weld metal such as the difference of the technical merit of semi-automatic welding or change of some air quantity makes a big impact.Also have, the slag amount performance of multimachine tool more is stable more, and the few more efficient of slag amount is high more.
The present application person is to existing 540N/mm
2The level welding wire is implemented basic improvement, the complete solid-core welding wire for carbon dioxide gas protection arc welding that can reach above-mentioned purpose.
Summary of the invention
The present invention does in view of such problem points, and its purpose is, a kind of solid-core welding wire for carbon dioxide gas protection arc welding is provided, and it is as 540N/mm
2(=YGW18) practicality height can access the weld part of longitude and tenacity excellent, the slag fissility that has appropriateness under the slag amount of appropriateness to the level welding wire.
Solid-core welding wire for carbon dioxide gas protection arc welding of the present invention; contain that C:0.020～0.070 quality %, Si:0.70～1.10 quality %, Mn:1.50～1.74 quality %, P:0.005～0.018 quality %, S:0.010 quality % are following, Ti:0.18～0.30 quality %, B:0.0015～0.0060 quality %, Mo:0.08 quality % following, O:0.0100 quality % is following, Cu (containing this plating amount when the side face of welding wire has copper facing): below the 0.45 quality %; surplus is Fe and unavoidable impurities, parameter X
W(quality %) is based on the content of C, Si, Mn and B, by X
WWhen=C+Si/24+Mn/6+B * 30 define, X
WBe 0.380～0.600 quality %.
Connect with in the solid core welding wire at this carbon dioxide gas arc welding, can contain the element of selecting in following group more than a kind in addition: Nb:0.08 quality % is following, V:0.08 quality % is following, Al:0.08 quality % is following, Cr:0.50 quality % is following reaches below the Ni:0.50 quality %.At this moment, described parameter X
WAlso to add the content (element that does not contain is 0) of Ni, Cr, Mo, V, Nb and Al, as X
WWhen=C+Si/24+Mn/6+B * 30+Ni/20+Cr/20+Mo/4+V/14+Nb/14+Al/20 defines, this parameter X
WBe 0.380～0.600 quality %.
In addition, there is the MoS of 0.01～1.00g in the welding wire of every 10kg on the surface
2
According to the present invention, can form the weld part of intensity and tenacity excellent, slag amount and slag fissility appropriateness can access as 540N/mm
2The level welding wire (=YGW18) have a solid-core welding wire for carbon dioxide gas protection arc welding of excellent characteristic.
Description of drawings
Fig. 1 is the figure of expression soldering test shape and groove shape.
Fig. 2 is the figure of the extracting position of expression weld metal tension test sheet.
Fig. 3 is the figure of the extracting position of expression weld metal pendulum impact test sheet.
The specific embodiment
Present inventors etc. are about 540N/mm
2The level welding wire (study repeatedly, the clear and definite essential factor that influences to its characteristic by=YGW18) welding slag.That is, the growing amount of welding slag is among strong deoxidation composition, and is the closest with Mn, Ti and O magnitude relation, and along with their increase of content, the slag growing amount increases.In addition when plate sheet welding, when using the liner plate of quality of poor quality, the toughness of weld metal is reduced though contain nitrogen, Ti for a long time with it as the TiN immobilization, then help toughness to improve.In other words, if Ti measures the easy deterioration of toughness when being thin plate at least.On the other hand, if Ti is very few, then droplet transfer from droplet transfer (globular transfer) of big grain becomes the short circuiting transfer of granule, the distance that disperses, a large amount of generations of splashing.If robot welding does not constitute problem so, but but become great problem in semi-automatic welding, because need implement the torch-tip cleaning continually, welding efficiency reduces.In addition, it is bad that the significantly minimizing of slag causes protection easily.
The fissility of slag, and the intensity of the interface energy between the slag/weld metal under the molten condition, the slag self after solidifying, weld metal surface is concavo-convex, be physical property difference of height, with and the high-order bit generate between the frequency confidential relation arranged, because the increase of Mn, Ti and the minimizing of P cause the slag fissility to reduce.On the other hand, if based on these conclusions that has obtained, exceedingly pursuing reduction of slag growing amount and fissility develops skill, then be easy to generate the instabilityization of the performance of the such machinery of intensity and toughness, reduce with the security when peeling off the welding that slag brings, and such problem takes place in the heat cracking of weld metal.
Mo is as the element of high strength that can realize weld metal and famous, according to JIS Z3312YGW18 specification, also allow to stipulate to add with the upper limit below the 0.40 quality %, but under temperature conditions between the low input heat energy of thin plate, low road, because the interpolation of Mo causes superfluous quenching of weld metal and embrittlement.In addition, the interpolation of Mo combines with the liner plate of poor quality of high nitrogen amount, causes the obviously low malleablization of weld metal remarkable.Therefore as can be known,, can both obtain the welding wire of high tenacity, be not so good as the aspect that Mo can lack to the greatest extent and be advisable, preferably not add as the slab about from the thin plate about thickness of slab 12mm to thickness of slab 80mm though the surplus capacity of the performance of the machinery of slab side is few.
As the essential factor beyond other the component of weld wire, find that also then the molten bath forms confusion if the instability that welding wire is given takes place, the uneven thickness one of the slag that is generated makes slag fissility deterioration.
Secondly, composition interpolation reason and the composition qualification reason for solid-core welding wire for carbon dioxide gas protection arc welding of the present invention describes.
" C:0.020～0.070 quality % "
C is the important interpolation element that is used to guarantee intensity, when still being lower than 0.020 quality %, then can not guarantee necessary intensity under the temperature welding condition between the input of the height when thick plates heat energy, high road.Be preferably more than the 0.040 quality %.On the other hand, if add C superfluously, heat cracking takes place easily then.In addition, in arc atmosphere, generating capacity also increases the arc stability deterioration because CO outburst phenomenon causes splashing.Between the low input heat energy during plate sheet welding, low road under the temperature welding condition intensity become superfluous, toughness reduces on the contrary.If surpass 0.070 quality %, then these effects become significantly, thus on be limited to 0.070 quality %.Be preferably in addition below the 0.060 quality %,
" Si:0.70～1.10 quality % "
Si is used to guarantee intensity and prevents to add because of the gas hole defect that deoxidation causes.The slag amount increases if add then in a large number, but has the effect that the slag fissility is improved, and these effects are effective more than 0.70 quality %.Fissility is poor when being lower than this value, and the efficient that becomes reduces and the electric arc instability.Be limited to 0.85 quality % under preferred.On the other hand, if the superfluous Si of interpolation and surpass 1.10 quality %, slag amount surplus then, the arc stability deterioration, and toughness reduces.The fissility surplus, the security during semi-automatic welding also reduces.Therefore 1.10 quality % are the upper limit of Si.
" Mn:1.50～1.74 quality % ".
Mn has the effect that obtains deoxidation, intensity rising, high tenacity.General high heat energy input contains Mn with the much amounts of welding wire, but on the other hand, Mn can increase the growing amount of slag, and can make the fissility deterioration.When being lower than 1.50 quality %, the undercapacity when toughness and thick plates.Because the slag amount is very few, so the welding person of technical merit deficiency might cause the performance deficiency of protection deficiency and weld metal.Slag fissility surplus, the security during semi-automatic welding also can reduce.Therefore, 1.50 quality % are the lower limit of Mn.On the other hand, surpass the interpolation meeting of 1.74 quality % because the arc stability deterioration that the increase of slag value and fissility reduction cause and the reduction of efficient.In addition, between the low input heat energy when plate sheet welding, road under the temperature welding condition intensity become superfluous, toughness reduces on the contrary.Therefore, 1.74 quality % are the upper limit of Mn.More preferably below the 1.70 quality %.
" Ti:0.18～0.30 quality % "
Ti improves the droplet transfer and the stability of the big grain of high current field, is the main component that forms the slag film.When being lower than 0.18 quality %, under the situation of the welding wire of the employed diameter 1.4mm of semi-automatic welding, the remarkable deterioration of arc stability in the high current field more than 400A, the generating capacity that splashes increases, and is used to remove efficiency of operation and reduces.In addition, the slag quantity not sufficient, the welding person of technical merit deficiency might cause the performance deficiency of protection deficiency and weld metal.Also be subjected to the influence of wind easily.The fissility surplus of slag, the security during semi-automatic welding also reduces.On the other hand, surpass 0.30 quality % if add, then the slag amount excessively increases, and the increase of slag amount and fissility reduce the reduction that causes arc stability deterioration and efficient.Therefore, be limited on below the 0.30 quality %.Be preferably below the 0.23 quality %.
" Mo:0.08 quality % is following "
Mo generally improves hardenability, the intensity of weld metal is risen, but on the other hand, thin plate can bring the low malleablization that causes because of superfluous intensity more.Owing to combine, cause significantly low malleablization remarkable in addition with the liner plate of poor quality of high nitrogen amount.Therefore, can both obtain the welding wire of high tenacity, be advisable, preferably not add be not as the least possible as Mo as the slab about from the thin plate about thickness of slab 12mm to thickness of slab 80mm.But, be limited to 0.08 quality % in the permission as impurity, be worth then toughness reduction significantly if surpass this.More preferably less than 0.01 quality %.
" P:0.005～0.018 quality % "
Owing to add P, the surface tension in molten bath reduces, thereby the concavo-convex of the physical property that reduces when solidifying arranged and makes it smooth effect.Thus, the raising effect that has the slag fissility.This effect did not manifest when P was lower than 0.005 quality %, and reduced and the electric arc instability because of the fissility difference causes efficient.Therefore, the following of P is limited to more than the 0.005 quality %.On the other hand, the interpolation that P surpasses 0.018 quality % makes the fissility surplus, and the security during semi-automatic welding reduces.In addition, heat cracking takes place in weld metal easily.Toughness also reduces.Therefore, P on be limited to 0.018 quality %.
" S:0.010 quality % is following "
S is the same with P, and the surface tension in molten bath is reduced, and reduces the concavo-convex of physical property when solidifying and makes it smooth, improve effect thereby can access the slag fissility, but during a spot of interpolation, fissility significantly improves, high full property reduction, and the shortcoming that toughness reduces is remarkable.Therefore in the present invention, do not add S energetically, but as impurity element.If contain S in a large number, then also heat cracking can take place in addition.As impurity, these shortcomings then can not take place if be suppressed at below the 0.010 quality % in S, are the upper limit with 0.010 quality % therefore.Also have, the desulfurization when preferably strengthening melting is limited in S below the 0.006 quality %.
" B:0.0015～0.0060 quality % "
B makes the crystal grain miniaturization of weld metal by a spot of interpolation, has the effect that intensity of making and toughness improve.Though the YGW18 welding wire that does not add B is also arranged, in relatively thin thin plate,, then especially must add B in order to improve toughness if consider from the nitrogen component of the liner plate of high nitrogen and sneak into.When B was lower than 0.0015 quality %, the raising effect of the intensity when toughness and particularly slab are used manifested deficiency, therefore as lower limit.On the other hand, more surpass 0.0060 quality % and add superfluously, then intensity is superfluous and bring low malleablization on the contrary when sheet applications.Heat cracking takes place in addition easily.Therefore as the upper limit.More preferably below the 0.0035 quality %.
" O:0.0100 quality % is following "
Slag is an oxide.Therefore, if the O amount increases, then the slag growing amount that produces because of chemical reaction also increases.Arc stability deterioration consequently, and reduce because of removing operation increase efficient.In addition, because the field trash increase causes the toughness deterioration, heat cracking takes place easily also.If with next no problem usually, so O is defined in below the 0.0100 quality % at 0.0100 quality %.Also have, O and its distribution, promptly the position on the volume of wire rod, surface etc. has no relations, and is to amount to.
" Cu:0.45 quality % is following "
The Cu surplus makes heat cracking take place when adding easily, and makes the change of properties of slag, makes the fissility deterioration.Arc stability deterioration consequently.Not having the meaning of actively adding, major part as former line is to implement the amount of copper facing part for electric conductivity, resistance to rust, stringiness, ingenuity property improvement.If surpass 0.45 quality %, the problem of heat cracking and slag fissility then appears, be limited to 0.45 quality % on therefore.Also having, contain in the only not online material self of Cu, and have in the copper-plated welding wire at side face, is the content that also contains the plating part.
" Nb, V, Al are respectively below the 0.08 quality %, and it is following that Cr, Ni are respectively 0.50 quality % "
If Nb, V, Al, Cr, its content of Ni are a small amount of, then make the crystal grain miniaturization, thereby toughness is improved.But, if add Nb, V, Al, add Cr, Ni and surpass 0.50 quality % above 0.08 quality %, cause that then the increase of slag amount and fissility reduce, cause efficient to reduce because of removing the operation increase, and the electric arc instabilityization.In addition, it is superfluous that weld metal intensity when sheet applications also becomes, and brings low malleablization.Therefore, Nb, V, Al are the upper limit with 0.08 quality %, and Cr, Ni are the upper limit with 0.50 quality %.Also having, is to be the upper limit with 0.020 quality % as preferred scope for Nb, V, Al.For Cr, Ni, be to be the upper limit with 0.10 quality % as preferred scope.
" parameter X
W(quality %): 0.380～0.600 "
Wherein, parameter X
WBy following numerical expression definition.
The situation that does not contain the welding wire of selection component:
X
W＝C+Si/24+Mn/6+B×30
The situation that contains the welding wire of selection component:
X
W＝C+Si/24+Mn/6+B×30+Ni/20+Cr/20+Mo/4+V/14+Nb/14+Al/20
This parameter X
WBe the variable that marks alone in order to represent B to add the hardenability of weld metal, calculate according to component of weld wire.In the utilization, no matter be that each element of C, Si, Mn, B, Ni, Cr, Mo, V, Nb, the Al of constitutional formula is positive interpolation or impurity and bring calculating when being detected into, phase back analysis lower limit is following is considered as essence does not have the situation of amount of interpolation as except 0.Parameter X
WMore little, show that the hardenability of the weld metal that obtains is low more.Parameter X
WWhen being lower than 0.380 quality %, between the height input heat when toughness and particularly slab are used, high road under the temperature conditions, undercapacity.Therefore, parameter X
WLower limit be 0.380 quality %.On the other hand, if parameter X
WSurpass 0.600 quality %, then owing to the hardenability surplus, when causing the application of temperature conditions between the low input heat energy of thin plate, low road, the intensity surplus is brought low malleablization on the contrary.Therefore, parameter X
W(quality %) is 0.380～0.600.Also have, try to achieve X
WFormula in, about the value of the coefficient of each constituent content, be based on that the value of trying to achieve according to great deal of experiment data determines.
" the MoS of welding wire surface
2: every 10kg welding wire is 0.01～1.00g "
Giving property of welding wire brings very big influence also can for the slag fissility.Because it is stable that welding wire is given, the molten bath forms also stable, the thickness homogeneous of the slag of generation, and the strain of thermal contraction plays a role equably, peels off easily thus comprehensively.The MoS of welding wire surface
2Can reduce electric put deposited of giving between tip, welding wire, bring the raising of giving property of welding wire.Make it the method for superfluous oxidation and improve in the means of giving property of welding wire utilizing, excess oxygen is arranged, the shortcoming that the slag amount increases etc., coating MoS along the crystal boundary of the welding wire surface that has existed
2Means compare with other means because do not cause the worry of slag amount increase etc., so be suitable as giving property of the welding wire raising means of welding wire of the present invention.This effect is adhered to 0.01g on every 10kg welding wire effective when above.On the other hand, if make it to adhere to more than the 1.00g on every 10kg welding wire, then beginning to giving is interior accumulation, gives bad generation because of obstruction causes on the contrary, and the slag proterties is impacted, and fissility is reduced.It is the arc stability deterioration that mat passes through.Therefore, the MoS of welding wire surface
2With every 10kg welding wire 1.00g is higher limit.
[embodiment]
Pole panel (skin plate)/beam bamp joint that the simulation reinforcing bar is made uses the soldering test body with groove shape shown in Figure 1, under the welding condition shown in the table 1, welds with so-called semiautomatic welding connection.The welding place is 0.5～0.8m/ moving environment of stable wind of second outdoor.The composition of the post material that uses, beam material, liner plate is presented in the following table 2,3.Post material and beam material are blast furnace manufacturer system, are the electric furnace manufacturer system of market sale with respect to this liner plate, and nitrogen content is significantly high, and weldability is poor.Also have, in the non-welding body, be used to prevent strain and the contained plate installed adopts the post material identical materials with thickness of slab 25mm.
Then, calculate the fissility (test 1) of the slag after welding finishes by Digital Image Processing, instrumentation slag amount (test 2) is implemented tension test and pendulum impact test (test 3) as the index of the intensity of weld metal and toughness.The stability (test 4) of the electric arc during in addition, also record welds and the generating capacity that splashes (test 5).In addition, investigate the generation (test 6) of crackle by ultrasonic test.The invention component of weld wire is with relatively composition and their The experiment results are presented in the following table 4.Also have, in the chemical composition of table 4 "＜0.
* *" Writing method of this form represents to be lower than the value of general analysis lower limit, industrially do not contain.
Secondly, the fissility evaluation method for the slag of test 1 describes.The evaluation of fissility and slag amount is only with thin condition 1 instrumentation of the thickness of slab of beam material.Also have, 1 time good welding wire of condition confirms that it is following good too in condition.Estimate the nature fissility as method for quantitatively evaluating.After welding finished, the surface of steel plate temperature of temperature measuring position was cooled to 250 ℃ the moment between the general road shown in Fig. 1 (A), (B), (C), and the welding bead outward appearance is taken pictures.Fig. 1 (A) is a plane, (B) is front view, (C) is stereogram.Symbol 1 is a pole panel, and symbol 2 is beam flanges, and symbol 3 is to restrain plate, and symbol 4 is run-on tab (end tab), and symbol 5 is liner plates.
Secondly, this welding bead outward appearance photo two-value is turned to (a) slag part of peeling off naturally and the part that (b) is attached with the slag state.Utilize image analysis software to calculate the total of pixel (pixel) separately, try to achieve slag with (a)/((a)+(b)) * 100 and peel off rate (quality %).Slag is peeled off rate and is set off down from the viewpoint of efficientibility and be limited to 5 quality %, from guaranteeing the viewpoint of security, on be limited to 15 quality %, it is good that this scope is judged to be the slag fissility.
Then, behind welding bead outward appearance photograph taking, reclaim whole slags, wrap also that nature peels off, carry out gravimetry for the slag amount of test 2.From the viewpoint of the stability of machinery, be limited to 5g down, from the viewpoint of efficientibility, on be limited to 8g, it is good that this scope is judged to be the slag amount.
Then, the tension test and the pendulum impact test of test 3 weld metal are respectively condition 1,2 times, by Fig. 2 and position shown in Figure 3, extract JISZ3111 A2 number (the diameter 6mm of equality portion) and code test sheet (10mm angle) for test.Also have, tension test is 20 ℃ of room temperature, and pendulum impact test is 0 ℃, with 3 average out to evaluations of estimate.Tensile strength is 490N/mm
2More than be qualified, the average 70J of pendulum impact test is above to be qualified.
Test 4 arc stability is estimated by the sense organ in the welding, when particularly slag does not disturb, upsets the generation of electric arc, perhaps the droplet transfer not chaotic, be not judged as well when not splashing in a large number.Also have, the situation that the generation welding wire is given the confusion of the bad electric arc that causes also is defective.
The generating capacity that splashes of test 5 is after the welding of condition 1 finishes, and reclaims attached to splashing on the protective cover tip (shield nozzle), carries out gravimetry.The generating capacity that splashes is to be judged to be below the 12g well.
Following table 1 shows welding condition, the combination of table 2 expression steel plate, the chemical composition (quality %) of table 3 expression steel plate and liner plate.
[table 1]
| Welding method | Semi-automatic welding |
| Source of welding current polarity | DC generator, antipolarity |
| Protective gas | CO 225 liters/minute of flows |
| The welding wire footpath | Diameter 1.4mm |
| The heat input | Condition 1: maximum 25kJ/cm condition 2: maximum 40kJ/cm |
| Temperature between the road | Condition 1: maximum 200 ℃ of conditions 2: maximum 350 ℃ |
| Posture | Down to |
| Welding wire is given prominence to length | 25～28mm? |
| Welding slag is removed | Condition 1: nothing, condition 2: have |
| Nozzle adheres to splash to be removed, cleans | Condition 1: nothing, condition 2: have |
| The wind speed environment | Outdoor/0.5～0.8m/ second |
[table 2]
| ? | The post material | The beam material | Liner plate |
| Condition 1 (thin plate) | The long 350mm of the wide 175mm * plate of SN 490C thickness of slab 25mm * plate | The long 300mm of the wide 175mm * plate of SN 490C thickness of slab 16mm * plate | The long 330mm of the wide 30mm * plate of SN 490A thickness of slab 9mm * plate |
| Condition 2 (slab) | The long 350mm of the wide 175mm * plate of SN 490C thickness of slab 75mm * plate | The long 300mm of the wide 175mm * plate of SN 490C thickness of slab 60mm * plate | The long 330mm of the wide 30mm * plate of SN 490A thickness of slab 9mm * plate |
[table 3]
| Purposes/steel grade | C? | Si? | Mn? | P? | S? | N? |
| SN 490C 16mm is thick | 0.16? | 0.31? | 1.40? | 0.009? | 0.005? | 0.0026? |
| SN 490C 25mm is thick | 0.15? | 0.35? | 1.45? | 0.010? | 0.003? | 0.0029? |
| SN 490C 60mm is thick | 0.15? | 0.38? | 1.49? | 0.011? | 0.002? | 0.0030? |
| SN 490C 75mm is thick | 0.14? | 0.39? | 1.50? | 0.010? | 0.003? | 0.0028? |
| Liner plate/SN 490A | 0.11? | 0.13? | 0.46? | 0.017? | 0.022? | 0.0125? |
(quality % has only MoS to the composition of following each welding wire of table 4 demonstration
2Unit is the g/10kg welding wire), table 5 shows result of the test.Shown in table 4 and table 5, embodiment No.1～20th, example of the present invention, the content of each composition is in scope of the present invention, therefore stability, low spatter and the anti-crackle of the intensity of the fissility of slag, slag amount, weld metal, toughness, electric arc are all good, can access excellent weld job, and no matter thickness of slab can both obtain the weld metal of the character of stable machinery.
On the other hand, comparative example No.21～50 depart from the scope of the present invention.Its C of comparative example No.21 is very few, the undercapacity of weld metal when thick plates.Its C surplus of comparative example No.22, weld metal generation heat cracking, because of superfluous intensity causes low malleablization, it is also many to splash when plate sheet welding, and arc stability is also poor, and the protective cover tip takes place easily to be stopped up, so the continuous welding deterioration.Its Si of comparative example No.23 is very few, the undercapacity of weld metal during thick plates, and the slag fissility is also poor, causes electric arc instability, continuous welding deterioration because of slag disturbs.Its Si surplus of comparative example No.24, the toughness deficiency of weld metal, the slag amount is superfluous and become interference, electric arc instability, continuous welding deterioration.This external cause slag fissility surplus causes the slag that disperses, and considers dangerous from the safety face.
Its Ti of comparative example No.25 is very few, and the generating capacity that splashes is many, and arc stability is poor, and the protective cover tip takes place easily to be stopped up, so the continuous welding deterioration.Except the nitrogen component that flows into from liner plate, because the slag amount is very few, so the protective in molten bath is poor, because being involved in of nitrogen causes toughness to reduce in the atmosphere.In addition, because slag fissility surplus causes slag to disperse, consider dangerous from the safety face.Its Ti surplus of comparative example No.26, the slag amount is many, and fissility is also poor.Because of disturbing, slag makes electric arc instability, continuous welding deterioration.Its Mn of comparative example No.27 is very few, and the tensile strength of the weld metal during thick plates is low.Because the slag amount is very few, so the protective in molten bath is poor, because being involved in of nitrogen causes toughness to reduce in the atmosphere.In addition, because slag fissility surplus causes slag to disperse, consider dangerous from the safety face.
Its Mn surplus of comparative example No.28, the slag amount is many, and fissility is also poor.Because of disturbing, slag makes electric arc instability, continuous welding deterioration.When plate sheet welding, cause low malleablization because of the intensity surplus.Its Mo surplus of comparative example No.29 causes low malleablization because of the intensity surplus when plate sheet welding.Its Mo of comparative example No.30 is further superfluous, not only when plate sheet welding, even if also can cause the toughness deterioration because of intensity is superfluous when thick plates.Comparative example No.31,32 its S surpluses, toughness is low, and heat cracking takes place.In addition, because slag fissility surplus causes slag to disperse, consider dangerous from the safety face.Its O surplus of comparative example No.33, the slag amount increases.Diminish the stability of electric arc, the continuous welding deterioration.Field trash surplus in the weld metal, heat cracking takes place, and toughness also reduces.
Its P of comparative example No.34 is very few, and the fissility of slag is poor, causes electric arc instability, continuous welding deterioration because of slag disturbs.Its P surplus of comparative example No.35, toughness is low, and heat cracking takes place.Because slag fissility surplus causes slag to disperse, consider dangerous from the safety face.Its Cu surplus of comparative example No.36, heat cracking takes place, and the slag fissility is also poor, causes electric arc instability, continuous welding deterioration because of slag disturbs.Its B deficiency of comparative example No.36, the undercapacity during thick plates, and thickness of slab toughness is all not enough.Its B surplus of comparative example No.38, heat cracking takes place.When plate sheet welding, cause the toughness deterioration in addition owing to superfluous intensity.Comparative example No.39～No.43 is Nb, V, Al, Cr, Ni surplus respectively, and the slag amount increases, and fissility also reduces.Because of disturbing, slag causes electric arc instability, continuous welding deterioration.Intensity surplus when plate sheet welding, toughness also reduces.
Its MoS of comparative example No.44
2The adhesion amount surplus is at the MoS in the system that gives of conduit liner (conduit liner) etc.
2Pile up and obstruction, welding wire is given very unstable.Consequently arc stability is impaired, and slag skewness one is changed and brought harmful effect, and fissility reduces.Splashing amount also increases.Its Mn of comparative example No.45, O surplus.The slag amount increases and fissility reduces significantly, causes electric arc instability, continuous welding deterioration because of slag disturbs.Oxide in the weld metal becomes field trash, and toughness reduces, and crackle also takes place.Its Si of comparative example No.46 is very few, Mo, B surplus.Because the Si deficiency so the slag fissility is poor, causes electric arc instability, continuous welding deterioration because of slag disturbs.Because the B surplus, so heat cracking takes place.In addition because Mo, B surplus, thus when plate sheet welding the intensity surplus, the toughness deterioration.Its C of comparative example No.47, Mn, S surplus.Because the Mn surplus so the slag amount increases and fissility reduces, causes electric arc instability, continuous welding deterioration because of slag disturbs.Because C, S height, so heat cracking is given birth to.C, Mn surplus cause the intensity surplus, and because the S surplus causes toughness also low.Because the C surplus, so the generating capacity that splashes is also many.
Its Ti of comparative example No.48, Mn, Mo, S and B surplus, parameter X
WExcessive, so the slag amount increases and fissility reduces significantly, causes electric arc instability, continuous welding deterioration because of slag disturbs.Because hardenability surplus, intensity are high significantly, therefore be not only plate sheet welding, also can the intensity surplus during thick plates and toughness reduces.Because S and B height are so heat cracking also takes place.Comparative example No.49 is an example of welding wire that is called as the JIS Z3312YGW11 specification of 490MPa level, S surplus, B deficiency.The toughness deficiency, intensity is also not enough when thick plates.Slag fissility surplus causes the slag that disperses, and this considers dangerous from secure context.Its Mn of comparative example No.50, Mo surplus.The slag amount increases and fissility reduces significantly, causes electric arc instability, continuous welding deterioration because of slag disturbs.Though the content of each element of comparative example No.51 satisfies regulation, X
WNot enough.Because the hardenability deficiency, so the toughness deficiency, intensity is also not enough when thick plates.Comparative example No.52 is the same with No.49, is the typical case of welding wire that is called as the JIS Z3312YGW11 specification of 490MPa level, S surplus, B deficiency.The toughness deficiency, intensity is also not enough during thick plates.Slag fissility surplus causes the slag that disperses, and this considers dangerous from secure context.Though the content of each element of comparative example No.53 satisfies regulation, X
WSuperfluous.Because the hardenability surplus, thus when plate sheet welding the intensity surplus, the toughness deterioration.
[table 4-1]
[table 4-2]
[table 4-3]
[table 4-4]
[table 5-1]
[table 5-2]
Claims (3)
1. solid-core welding wire for carbon dioxide gas protection arc welding; it is characterized in that; contain C:0.020～0.070 quality %; Si:0.70～1.10 quality %; Mn:1.50～1.74 quality %; P:0.005～0.018 quality %; below the S:0.010 quality %; Ti:0.18～0.30 quality %; B:0.0015～0.0060 quality %; below the Mo:0.08 quality %; below the O:0.0100 quality %; below the Cu:0.45 quality %; surplus is Fe and unavoidable impurities; wherein; when the welding wire side face is coated with Cu; the content of the Cu of welding wire comprises the plating amount of this copper
And, parameter X
WBased on the content of C, Si, Mn and B, by X
WWhen=C+Si/24+Mn/6+B * 30 define, X
WBe 0.380 quality %～0.600 quality %.
2. solid-core welding wire for carbon dioxide gas protection arc welding according to claim 1; it is characterized in that; at least a element that also contains below Nb:0.08 quality %, selects below the V:0.08 quality %, below the Al:0.08 quality %, below the Cr:0.50 quality % and below the Ni:0.50 quality %
And, described parameter X
WAdd the content of Ni, Cr, Mo, V, Nb and Al, as X
WWhen=C+Si/24+Mn/6+B * 30+Ni/20+Cr/20+Mo/4+V/14+Nb/14+Al/20 defines, this parameter X
WBe 0.380 quality %～0.600 quality %, wherein, content is 0 not containing sometimes for Ni, Cr, Mo, V, Nb and Al.
3. solid-core welding wire for carbon dioxide gas protection arc welding according to claim 1 and 2 is characterized in that, there is the MoS of 0.01～1.00g in the welding wire of every 10kg on the surface
2
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| JP2007-153358 | 2007-06-08 | ||
| JP2007153358A JP5137468B2 (en) | 2007-06-08 | 2007-06-08 | Solid wire for carbon dioxide shielded arc welding |
| JP2007153358 | 2007-06-08 |
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| KR (1) | KR20080108052A (en) |
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| CN101905392B (en) * | 2010-08-26 | 2012-04-25 | 宜昌猴王焊丝有限公司 | High-toughness low-alloy solid welding wire |
| CN102528318A (en) * | 2010-12-17 | 2012-07-04 | 鞍钢股份有限公司 | Gas-shielded welding wire for nuclear power |
| FR2990636B1 (en) * | 2012-05-21 | 2015-03-20 | Air Liquide | THREAD WIRE FOR WELDING HIGH ELASTIC LIMIT STEELS |
| CN103464871B (en) * | 2013-09-06 | 2016-03-30 | 海宁瑞奥金属科技有限公司 | A kind of high tenacity CO 2gas protecting welding wire and application thereof |
| CN103600178B (en) * | 2013-11-27 | 2016-08-17 | 中车眉山车辆有限公司 | A kind of high-strength weathering steel gas shield solid core welding wire |
| CN105195919A (en) * | 2014-06-11 | 2015-12-30 | 鞍钢股份有限公司 | Steel for gas shielded welding wire for high-strength weathering steel and welding wire |
| CN106181114A (en) * | 2015-04-29 | 2016-12-07 | 海宁瑞奥金属科技有限公司 | The low spatter gas shield welding wire that arc stability is excellent |
| CN108031956A (en) * | 2017-11-06 | 2018-05-15 | 山西太钢不锈钢股份有限公司 | The welding method of austenitic stainless steel |
| CN113613827A (en) * | 2019-03-29 | 2021-11-05 | 杰富意钢铁株式会社 | Solid wire for gas metal arc welding and gas metal arc welding method |
| CN113414474B (en) * | 2021-07-09 | 2022-06-17 | 天津大学 | Titanium alloy welding system and method with carbon dioxide as ambient atmosphere |
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| CN1328897A (en) * | 2001-08-08 | 2002-01-02 | 武汉钢铁(集团)公司 | Microtitanium-boron high-toughness gas protective welding stick |
| CN1593836A (en) * | 2004-06-25 | 2005-03-16 | 武汉钢铁(集团)公司 | High strength high tenacity high weather resistant gas protecting welding wire |
| CN1935443A (en) * | 2004-09-22 | 2007-03-28 | 株式会社神户制钢所 | Solid wire for gas shielded arc welding |
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| JPH07299583A (en) * | 1994-05-10 | 1995-11-14 | Kobe Steel Ltd | Plated wire for gas shield arc welding |
| JP3352920B2 (en) * | 1997-09-30 | 2002-12-03 | 株式会社神戸製鋼所 | Gas shielded arc welding method |
| JP3576393B2 (en) * | 1998-08-19 | 2004-10-13 | 株式会社神戸製鋼所 | High toughness weld metal |
| JP3933937B2 (en) * | 2002-01-16 | 2007-06-20 | 株式会社神戸製鋼所 | Solid wire without copper plating for carbon dioxide arc welding |
| JP3842707B2 (en) * | 2002-08-30 | 2006-11-08 | 株式会社神戸製鋼所 | Weld metal for low alloy heat resistant steel |
| JP2004195543A (en) * | 2002-12-20 | 2004-07-15 | Jfe Steel Kk | Steel wire for gas shielded arc welding |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328897A (en) * | 2001-08-08 | 2002-01-02 | 武汉钢铁(集团)公司 | Microtitanium-boron high-toughness gas protective welding stick |
| CN1593836A (en) * | 2004-06-25 | 2005-03-16 | 武汉钢铁(集团)公司 | High strength high tenacity high weather resistant gas protecting welding wire |
| CN1935443A (en) * | 2004-09-22 | 2007-03-28 | 株式会社神户制钢所 | Solid wire for gas shielded arc welding |
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| JP平9-168889A 1997.06.30 |
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| JP5137468B2 (en) | 2013-02-06 |
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