CN101259571A - Solid soldering wire for carbon dioxide gas protection arc welding - Google Patents
Solid soldering wire for carbon dioxide gas protection arc welding Download PDFInfo
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- CN101259571A CN101259571A CNA2008100051120A CN200810005112A CN101259571A CN 101259571 A CN101259571 A CN 101259571A CN A2008100051120 A CNA2008100051120 A CN A2008100051120A CN 200810005112 A CN200810005112 A CN 200810005112A CN 101259571 A CN101259571 A CN 101259571A
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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
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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 invention provides a solid core welding wire used for CO2 gas shielded arc welding which contains: C: 0.020-0.100 wt. %, Si: 0.65-1.10 wt. %, Mn: 1.40-1.74 wt. %, P: 0.005-0.018 wt. %, S: 0.007-0.020 wt. %, Ti: 0.11-0.18 wt. %, B: 0.0015-0.0073 wt. %, C+15*B: 0.0600-0.1990 wt. %, Mo: less than 0.08 wt. %, O: less than 0.0100 wt. %, Cu: less than 0.45 wt. %, allowance is Fe and unavoidable impurity. The solid core welding wire with 540N/mm<2> mechanical property is used as welding metal with excellent slag peeling property, lower slag amount, better intensity and tenacity whatever plate thick in robot constructing, in addition, splash amount is reduced.
Description
Technical field
The present invention relates to a kind of solid-core welding wire for carbon dioxide gas protection arc welding, its to mild steel or 490 to 520N/mm
2The level high tension steel is when carrying out shield carbon-dioxide arc welding, efficient height not only, and can access the well behaved weld metal of machinery.
Background technology
In recent years, in the building iron field, with CO
2Be the shielded arc welding method of protective gas, use owing to the advantage of its efficientibility is used as the main force.Up to now major part is the semiautomatic welding connection with hand, still, to reduce cost by saving human resources, to bring further efficient to rise to purpose by unmanned running the on night and day off, utilizes the automatic welding of robot also to be popularized.
On the other hand, aspect welding quality, in order to be the performance that main purpose attempts to improve welded-joint to improve vibration strength, in JASS6 revisions in 1997, building standard method revision in 1999, temperature is carried out upper limit management between the heat energy road of regulation during to welding.Be subjected to this trend, welding wire is also developed the welding wire of temperature between the high road of corresponding high heat energy, can allow it for 490N/mm
2The level carbon steel sheet, the highest heat energy reaches that temperature reaches 350 ℃ between 40kJ/cm, road, for 520N/mm
2The level carbon steel sheet, the highest heat energy reached that temperature reaches 250 ℃ between 30kJ/cm, road, at 1999 years 540N/mm
2Level=YGW18 has obtained JISization.After, under temperature between this high road of high heat energy, also can access the 540N/mm of excellent mechanical performance
2The level welding wire up to now, is popularized in the unmanageable semi-automatic welding of temperature as far back as between heat energy and road, still, uses 540N/mm recently in robot welding
2The situation of level welding wire also becomes more and more.
So far the known carbon dioxide of exploitation welding is with the pairing welding wire of temperature between the high road of big electric current, and the such deoxidation composition of the Si that generally contains, Mn, Ti is more than existing welding wire, and also adds Mo, B, Cr, Al, Nb, V, Ni etc. as required.Improve the hardenability of steel thus, the raising of the toughness of bringing by the crystal grain miniaturization remerges the effect of precipitation-hardening and solution hardening, has also improved intensity.It is big that this welding wire groove width becomes, and the steel plate effect that thickness of slab that temperature is high between the road is big is remarkable more.
Yet the actual conditions of these existing welding wires are that its design does not consider that all robot carries.Between the high road of existing big electric current, in the corresponding welding wire of temperature, there is slag generating capacity surplus, and the such shortcoming of fissility difference.Because slag is an insulating properties,, become immediate cause lack of penetration and that this defective of slag inclusion takes place so the slag of piling up hinders arc stability.In addition, if slag even do not have is peeled off naturally, even then the limit, starting the arc position of staggering, robot limit is attempted reignition of arc and still can be continued starting the arc mistake, robot can judge wrong and stop.Though welding robot is being brought into play maximum strong point on unmanned, but because of slag accumulation in the short time can cause the instabilityization of electric arc, need high-frequency to remove slag by staff, in order to repair starting the arc mistake, what just produce that the slag that carries out starting the arc portion removes needs etc., thereby can not bring into play its strong point.Therefore,, just expect a kind ofly under the condition of 350 ℃ of temperature between maximum heat energy 40kJ/cm, the highest road, have 490N/mm in order to address this problem
2The performance of the needed sufficient machinery of level steel, and the slag generating capacity is few, and fissility is also good, continuously the big high efficiency welding wire of stack height.At this hope,, developed the spy and opened 2006-88187 number, spy and open 2006-305605 number, spy and open disclosed welding wire 2006-150437 number as the welding wire that has improved the slag fissility.In addition, not only the slag fissility improves, and the welding wire that also reduces of slag growing amount, the spy open 2004-122170 number, spy open also have in 2006-26643 number disclosed.
But as above-mentioned, the welding wire of temperature correspondence between the high road of high heat energy, the steel plate effect that thickness of slab is big more is remarkable more.Therefore, in the relatively thinner thickness of slab below the 20mm that temperature does not all improve very much between former heat energy and road, from the viewpoint of cost, the 490N/mm that is used for a long time
2Thereby level=YGW11 is believed to fully satisfy the demand be employed, itself and 540N/mm when thickness of slab is thick
2Level=YGW18 is used respectively, and is still pretty troublesome for exchanging recently, at 540N/mm
2Universal the welding wire cost and the 490N/mm down of level welding wire
2The gap of level is dwindled, and under the viewpoint that improves vibration strength instructed, building structure equipment person had strengthened reasons such as high strength sensing, when being the steel plate of thin plate as before, also can use 540N/mm
2The level welding wire.But, can cause 3 problems thus.
First problem is, because the groove area is little, thus exist heat energy only can be increased to situation about 25kJ/cm, and because number of weld passes is also few, so temperature just can stop welding between the road before only rising to about 200 ℃.In other words, because of temperature between the low road of low heat energy causes the condition of speed of cooling surplus, at 540N/mm up to now
2In the level welding wire, be not implemented in the miniaturization under the state of ferritic structure, but cause the phase transformation of tissue to bainite structure or martensitic structure, toughness is step-down on the contrary.
Second problem is that because the groove area diminishes, the mother metal dilution rate of liner plate relatively rises, the influence that is vulnerable to form.Now, liner plate uses the many inferior steel plates of nitrogen content in a large number for low price, because the increase of nitrogen content in the weld metal causes toughness to reduce.
The 3rd problem be because thickness of slab when thin between the road temperature do not have too and improve, so therefore the welding that just is through with before slag begins to peel off is that the slag fissility is well nonsensical, the more important thing is and will reduce the slag amount.
Yet, at this trend, open 2006-88187 number and the spy opens in 2006-150437 number above-mentioned spy, because too high and when being used for thin plate in intensity, the low on the contrary malleablization of weld part, and the slag amount do not reduce, so there is not the effect of improving of operation.In addition, open in 2006-26643 number the spy, although the slag fissility improves, and the minimizing of slag growing amount, do not consider mechanical performance, do not avoid the superfluous intensity and the thing followed to hang down malleablization.Open in 2004-122170 number the spy, do not have the applicability of consideration in robot, the reduction of slag amount and the raising of fissility are insufficient.In addition, when being used for thin plate, the toughness deficiency of weld part.
Summary of the invention
The present invention carries out in view of this problem points, and its purpose is to provide a kind of solid-core welding wire for carbon dioxide gas protection arc welding that is suitable for continuous welding, and it has as 540N/mm
2The character of the basic machinery of level=YGW18, and in the construction of using robot, no matter thickness of slab is Bao Shihou, promptly can not be subjected to about thickness of slab, can both obtain excellent slag fissility and slag amount and reduce, and intensity and all good weld metal of toughness, the generating capacity that splashes in addition is also few.
Solid-core welding wire for carbon dioxide gas protection arc welding of the present invention; contain that C:0.020～0.100 quality %, Si:0.65～1.10 quality %, Mn:1.40～1.74 quality %, P:0.005～0.018 quality %, S:0.007～0.020 quality %, Ti:0.11～0.18 quality %, B:0.0015～0.0073 quality %, C+15 * B:0.0600～0.1990 quality %, Mo:0.08 quality % are following, O:0.0100 quality % following, below the Cu:0.45 quality %, surplus is Fe and unavoidable impurities.At this, described Cu content is the part of this plating Cu of containing when welding wire surface being implemented plating Cu.
Under this situation, the content of Mo is preferably below the 0.01 quality %.In addition, in the present invention, can also contain among the following Ni of following Cr of 0.08 quality % following Nb, 0.08 quality % following V, 0.08 quality % following Al, 0.50 quality % and 0.50 quality % more than at least a kind.In addition, also there is MoS in addition at welding wire surface
2, preferably have 0.01～1.00g in every 10kg welding wire.
According to the present invention, can access a kind of solid-core welding wire for carbon dioxide gas protection arc welding that is suitable for sequential welding, it is as 540N/mm
2The welding wire of level has the character of fully basic machinery, and no matter thickness of slab can both be obtained excellent slag fissility and the reduction of slag amount in the construction of having adopted robot.In addition,, can access the good weld metal of intensity and toughness according to the present invention, the generating capacity that splashes in addition also few with existing welding wires such as the applied YGW11 of semi-automatic welding, YGW18 be equal extent.
Description of drawings
Fig. 1 is the curve map of the scope of the C of the welding wire of expression among the present invention and B.
Fig. 2 (a)～(c) is the figure of expression soldering test shape and groove shape.
Fig. 3 is the weld appearance photo, (a) represents the part that slag is peeled off naturally, and (b) expression is attached with the part of the state of slag.
Fig. 4 is the figure that takes the position of expression weld metal tension test sheet.
Fig. 5 is the figure that takes the position of expression weld metal pendulum impact test sheet.
The specific embodiment
Present inventors etc. carry out the research about welding slag repeatedly, make that to influence essential factor bright and clear.The growing amount of welding slag and strong deoxidation composition, promptly the relation of Mn amount and Ti amount is the strongest, and along with their increase of content, the slag growing amount increases.The intensity of the fissility of slag and the interface energy between the slag/weld metal under the molten condition, the slag self after solidifying, weld metal surface concavo-convex, the difference of height and its height position generation frequency that are physical property have very strong relation, because the minimizing of increase, S and the P of Mn causes fissility to reduce.On the other hand, as if the discovery based on these acquisitions, exceedingly pursue reduction of slag growing amount and fissility and develop skill, such shortcoming takes place in the reduction and the heat cracking that then are easy to generate the performance of intensity and this machinery of toughness.
Mo is known as the element of the high strength that can realize weld metal, press JIS Z3312YGW18 specification, and by the following upper limit regulation of 0.40 quality %, allow the interpolation of Mo, but under temperature conditions between the low road of low heat energy of thin plate, owing to the interpolation of Mo causes overquenching, make low malleablization remarkable.Therefore, in the robot welding that can control temperature between the heat energy road fully, distinguish,, make Mo few as much as possible with it, not as good as preferably not adding Mo as the welding wire of the slab about can covering from the thin plate about thickness of slab 12mm to thickness of slab 80mm.
As the essential factor that influences weldability beyond other the component of weld wire, find if the instability that welding wire is given takes place, the formation confusion in molten bath then, the slag of generation in uneven thickness makes slag fissility deterioration.
Below be described in detail for the present invention.At first,, describe with regard to its composition interpolation reason and composition qualification reason at the composition of welding wire of the present invention,
" C:0.020～0.100 quality % "
C is the important interpolation element that is used to guarantee the intensity of weld metal, but when C is lower than 0.020 quality %, needed intensity with can not guarantee between the high road of high heat energy the temperature welding time.Preferred C is more than the 0.050 quality %.On the other hand, surpass 0.100 quality % if add C, then heat cracking will take place easily.In addition, surpass 0.100 quality % if add C, then generating capacity increases the arc stability deterioration because CO outburst phenomenon causes splashing in arc atmosphere.In addition, the intensity surplus, toughness reduces on the contrary.Therefore, C content is below the 0.100 quality %.
" Si:0.065～1.10 quality % "
Si is in order to ensure intensity and prevents to add because of the gas hole defect that deoxidation causes.In addition, if add Si,, the slag fissility is improved although the slag amount increases.These effects can be to obtain more than the 0.65 quality % by making .Si content.If Si content is lower than 0.65 quality %, then slag fissility variation makes the electric arc instabilityization.In addition, the lower limit of preferred Si content is 0.75 quality %.On the other hand, if Si content surpasses 1.10 quality % and superfluous the interpolation, then melt amount surplus makes the arc stability deterioration, and the toughness of weld metal reduces.Therefore, Si content is below the 1.10 quality %.
" Mn:1.40～1.74 quality % "
Mn has the effect that obtains deoxidation, intensity rising and high tenacity by its interpolation.When Mn content is lower than 1.40 quality %, the intensity and the toughness deficiency of the weld metal when high heat energy welds.On the other hand, though general high heat energy contains Mn in a large number with welding wire, Mn has the growing amount that makes slag and increases, and makes the difficult point of fissility deterioration.In addition, when utilizing robot etc. to weld automatically, because welding wire is stable under the short state of outstanding length, so protectiveness is also good, thereby has the so less advantage of oxidation consumption amount of deoxidant element under the such condition of high heat energy welding condition on the contrary.Therefore when utilizing robot etc. to weld automatically,, can improve the character of machinery of weld metal and the balance of slag generating capacity and slag fissility by Mn being designed very low.If Mn content surpasses 1.74 quality %, then the slag amount increases, and fissility reduces.Consequently, also deterioration of arc stability.Therefore, Mn content is 1.40～1.74 quality %.
" S:0.007～0.020 quality %, P:0.005～0.018 quality % "
By the interpolation of S and P, the surface tension in molten bath reduces, and the concavo-convex minimizing of the physical property when solidifying has the ganoid effect that makes weld metal.Thus, the slag fissility is improved.When S is lower than 0.007 quality %, P and is lower than 0.005 quality %, can not get this effect.Therefore, the slag fissility reduces, and causes the arc stability deterioration thus.More than the preferred S:0.010 quality %, more than the P:0.007 quality %.On the other hand, surpass 0.020 quality % if add S, P surpasses 0.018 quality %, then the surface configuration of weld metal to improve effect saturated, and heat cracking takes place easily.In addition, the shape spheroidizing of slag, the fusion that hinders electric arc to bring, locality cause the electric arc instability.In addition, if S and P surplus, then the toughness of weld metal also reduces.Therefore, the higher limit of S is 0.020 quality %, and the higher limit of P is 0.018 quality %.
" Ti:0.11～0.18 quality % "
Ti improves the arc stability in the high current field.When Ti is lower than 0.11 quality %, the arc stability deterioration, the generating capacity that splashes increases.Therefore, Ti need add more than the 0.11 quality %.On the other hand, surpass 0.18 quality % if add Ti, then the slag quantitative change gets too much, and fissility is deterioration also, is difficult to by electric arc melting the arc stability deterioration.Use as semi-automatic welding, also use the welding wire of line footpath 1.4～1.6mm in a large number, aspect from arc stability, preferred interpolation Ti is more than the 0.20 quality %, but the general thin footpath welding wire that uses line footpath 1.2mm in robot welding, therefore adding Ti does not so in a large number have necessaryly, can obtain sufficient arc stability below the 0.18 quality % yet, from the point that the slag amount reduces, also needing to make Ti content is below the 0.18 quality %.More preferably the higher limit of Ti is below the 0.16 quality %.
" B:0.0015～0.0073 quality % "
B can make the crystal grain miniaturization of weld metal by a spot of interpolation, thereby has the effect that strength and toughness is improved.Though the YGW18 welding wire that does not add B is also arranged, in the relatively thin thin plate of thickness,,, makes the toughness raising of weld metal with regard to adding B then especially 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 %, because can not get the raising effect of intensity and toughness, the toughness deficiency was so the lower limit of B is 0.0015 quality %.On the other hand, surpass 0.0073 quality % if add B superfluously, then heat cracking takes place easily.Therefore, the content of B is higher limit with 0.0073 quality %.More preferably B is below the 0.0054 quality %, more preferably below the 0.0040 quality %.
" C+15 * B:0.0600～0.1990 quality % "
If the content according to C and B is decided to be parameter P with C+15 * B
CBThe time, P
CBNeed be 0.0600～0.1990 quality %.As above-mentioned, its content separately of C and B is by separate provision, and as parameter P
CB=C+15 * B needs this parameter P
CBValue restriction within the limits prescribed.
In the present invention, in general do not add intensity and improve the big Mo of effect, or make it, and, will make Mn be in lower value yet with respect to general YGW18 in order to reduce the generating capacity of slag near minimum, therefore, in this case can undercapacity.Therefore, if make P
CB=C+15 * B is more than 0.0600, and then the intensity brought of C and B improves effect and improves, and can access full intensity.On the other hand, C and B are the elements that makes the high-temperature cracking resistance deterioration, if two long-pending elements are all high, crackle take place easily then.But, if P
CB=C+15 * B is below the 0.1990 quality %, does not then have the problem of heat cracking in practicality, therefore with P
CB=C+15 * B is decided to be below the 0.1990 quality %.
Fig. 1 is that transverse axis is got C content by the curve map of the scope of the content of C that stipulates among hachure (hatching) expression the present invention and B, and the longitudinal axis is got B content.But Mo is below the 0.08 quality %, and Mn is below the 1.74 quality %.As shown in Figure 1, when C and B content were high, heat cracking became problem.In addition, if C and B content are low, then the intensity of weld metal or toughness reduce.
" Mo:0.08 quality % is following "
Mo generally makes the hardenability (welding wire by arc-melting is cooled, the hardenability in the process of solidifying) of weld metal improve, and the intensity of weld metal is risen, and still, under the situation of thin plate, superfluous intensity can be brought low malleablization on the contrary.Under the situation of slab and when the robot welding, because according to welding schedule, can hold a control welding heat energy temperature of taking part in Taoism fully, so add Mo superfluously, make the intensity property of there is no need of having more than needed superfluously.Therefore in the present invention, preferably do not add Mo.But as impurity, if Mo is allowed to next at 0.08 quality %.If the content of Mo surpasses 0.08 quality %, then toughness will significantly reduce.More preferably Mo content is lower than 0.01 quality %.
" O:0.0100 quality % is following "
Welding slag is an oxide.Therefore, if the O amount increases, then the slag growing amount that generates by chemical reaction also increases.Consequently, the arc stability deterioration, and because the field trash increase causes heat cracking also to take place easily.But, if O content is below the 0.0100 quality %, then there are not the problems referred to above, therefore O is limited to below the 0.0100 quality %.Also have, the action effect of O not letter is stored in its distribution.In other words, it doesn't matter in the position on the action effect of O and the volume of wire rod and surface etc., but need be stipulated by the total amount of O.
" Cu:0.45 quality % is following "
The superfluous interpolation of Cu can cause the heat cracking of weld metal to take place easily, and the character of slag is changed and makes the fissility deterioration.Arc stability deterioration consequently.Therefore, Cu is added on technical nonsensical energetically as former line adding ingredient, and the major part of Cu amount is in order to improve energising property, resistance to rust, stringiness and face shaping, to exist as welding wire surface being implemented copper-plated composition.If the Cu amount surpasses 0.45 quality %, then produce the problem of heat cracking and slag fissility, so the higher limit of Cu content is 0.45 quality %.Also have, when welding wire surface did not have copper facing, Cu was meant the amount of Cu contained in the wire rod, and when wire surface had plating Cu, Cu was meant the total amount of copper facing part contained and wire surface in the wire rod.
" Nb, V, Al: be respectively below the 0.08 quality % Cr, Ni: be respectively below the 0.50 quality % "
Nb, V, Al, Cr, Ni just can make the crystal grain miniaturization by a small amount of interpolation, thereby toughness is improved.But, adding above 0.08 quality % as if Nb, V, Al, Cr, Ni add above 0.50 quality %, and the increase and the fissility reduction of slag amount then take place, and cause that electric arc is stabilisation, and the intensity surplus, and toughness also reduces.Therefore, Nb, V, Al are higher limit with 0.08 quality %, and Cr, N are higher limit with 0.50 quality %.Also having, about Nb, V, is to be higher limit with 0.003 quality % as preferred scope.About Cr, Ni, be to be higher limit with 0.10 quality % as preferred scope.
" the MoS of welding wire surface
2: in every 10kg welding wire 0.01～1.00g is arranged "
Giving property of welding wire also can produce very big influence to the slag fissility.By making giving property of welding wire stable, also can make the formation in molten bath stable, the thickness of the slag that is generated is even, because the strain of thermal contraction plays a role equably, will be easy to peel off comprehensively.The MoS of welding wire surface
2Can reduce electric the melting of putting of giving between tip and the welding wire, make the raising of giving property of welding wire.As before, thereby in make it the method that superfluous oxidation improves giving property of welding wire along the welding wire surface crystal boundary, thereby exist O amount surplus slag amount to increase such shortcoming.With respect to this, pass through MoS
2Coating and welding wire is given in the method for raising because there is not the worry of slag amount increase etc., so be suitable as the raising method of the giving property of welding wire of welding wire of the present invention.Its effect makes welding wire surface adhere to MoS
2It is effective when above that every 10kg welding wire reaches 0.01g.On the other hand, if make welding wire surface adhere to MoS
2When every 10kg welding wire surpasses 1.00g, then give MoS in the system at the welding wire of pipe lining (conduit liner) etc.
2Begin to pile up, because MoS
2Welding wire takes place and gives badly in blocking pipe liner on the contrary, and the slag proterties is impacted, and fissility is reduced.Arc stability deterioration consequently.Therefore, MoS
2Adhesion amount to welding wire surface is a higher limit with the 1.00g/10kg welding wire.
[embodiment]
Next, compare the characteristic that embodiments of the invention are described with comparative example, and describe for effect of the present invention.Diaphragm plate (diaphragm) and the soldering test body that round steel pipe has carried out combination that employing will have the groove shape shown in Fig. 2 (a) with the welding condition shown in the table 1, adopt the steel building of market sale to weld with the robot welding system.Shown in Fig. 2 (b), (c), horizontal arrangement steel pipe 2 at its front-end configuration diaphragm plate 1, makes it vertical with its face.End face in diaphragm plate 1 side of steel pipe 2 forms the V groove, and the liner plate 3 of ring-type is configured under the groove of the weld part between diaphragm plate 1 and the steel pipe 2.Weld this groove with welding torch.
Table 2 shows the combination (condition 1 and condition 2) of the shape of diaphragm plate 1, steel pipe 2 and liner plate 3.Table 3 shows the composition of these diaphragm plates 1, steel pipe 2 and liner plate 3.Diaphragm plate 1 and steel pipe 2 are blast furnace manufacturer systems, and with respect to this, liner plate 3 is electric furnace manufacturer systems of market sale, and nitrogen content is significantly high, and weldability is poor.Also have, in table 2 and table 3, the label of SN490C etc. is represented JIS defined material.
Then, calculate the fissility (handling 1) of the slag after welding finishes by Digital Image Processing.In addition, calculate the slag amount of measuring (handling 2).In addition, implement tension test and pendulum impact test (handling 3) as the intensity of weldering metal and the index of toughness.The stability (handling 4) of the electric arc during in addition, also record welds and the generating capacity that splashes (handling 5).In addition, investigate the generation (handling 6) of heat cracking by ultrasonic test.Table 4-1～table 4-4 shows the composition of embodiments of the invention silk and comparative example welding wire.In addition, table 5-1 and table 5-2 show the The experiment results of embodiment and comparative example.Also have, the chemical composition of table 4, content is recorded and narrated by higher limit, expression be the general following value of analysis lower limit, do not contain industrial.In addition, the surplus of the component of weld wire in the table 4 is Fe.
Secondly, the fissility evaluation method (handling 1) for slag describes.The evaluation of fissility and slag amount is only calculated under the thin condition of the thickness of slab of steel pipe and is measured.Also have, confirm that at 1 time good welding wire of condition it is good too condition 2 times.In the welding starting point when entering into the welding of final welding bead, be the center to return 90 ° place from welding wire, to 100mm before and after it, add up to 200mm to take pictures.Fig. 3 is the photo of expression welding bead outward appearance, the part that (a) expression slag among Fig. 3 is peeled off naturally, (b) part of expression slag attachment state.Then, photo according to this welding bead outward appearance, calculate the aggregate value of each pixel (pixel) by image analysis software, try to achieve slag and peel off rate (quality %) by [pixel count of part (a)]/{ [pixel count of part (a)]+[pixel count of part (b)] } * 100.Then, slag peel off rate be 15 quality % above being judged to be good.Secondly, about handling the amount of 2 slag, be behind molten road outward appearance photograph taking, to reclaim whole slags, also comprise what nature was peeled off, carry out gravimetry.This slag amount is serving as good below the 12g.In addition, handle the tension test and the pendulum impact test of 3 weld metal,, take A2 number (parallel portion diameter 6mm) and the code test sheet (1 length of side is the square sectional of 10mm) of JIS Z3111 respectively condition 1,2 times.Fig. 4 represents to take from weld metal the position of taking of tension test sheet, and Fig. 5 represents to take from weld metal the position of taking of pendulum impact test sheet.Also have, tension test at room temperature (20 ℃) is implemented, and pendulum impact test is implemented down at 0 ℃, with the mean value of each 3 result of the test as evaluation of estimate.Then, tensile strength is 490N/mm
2More than, pendulum impact test is that average 70J is above for qualified.Handle 4 arc stability and estimate by the sense organ in the welding, particularly slag not have to hinder, upset electric arc generation the time be judged as well.Also have, also defective when the disorder of giving the bad electric arc that causes because of welding wire takes place.The generating capacity that splashes of processing 6 is to finish the back in the welding under the condition 1 to reclaim attached to splashing on the protective gas nozzle (shield nozzle), measures its weight, and 6g is following to be good.
[table 1]
| The welding machine | The reinforcing bar welding robot |
| Source of welding current polarity | DC generator, antipolarity |
| Protective gas | CO 225 liters/min of flow |
| Gage of wire | 1.2mmφ |
| The heat input | Maximum 40kJ/cm |
| Temperature between the road | Maximum 350 ℃ |
| Posture | Downwards |
| Welding wire is given prominence to length | 22～25mm |
| Slag is removed | Condition 1: unconditional 2: have |
| Tip adheres to splash removes cleaning | Condition 1: unconditional 2: have |
[table 2]
| Diaphragm plate | Steel pipe | Liner plate | |
| Condition 1 (thin plate) | SN490C thickness of slab 25mm * 450m m limit | STKN490B thickness of slab 16mm * external diameter 350mm | SN490A thickness of slab 9mm * external diameter 334mm |
| Condition 2 (slab) | SN490C thickness of slab 75mm * 800m m limit | STKN490B thickness of slab 60mm * external diameter 700mm | SN490A thickness of slab 9mm * external diameter 640mm |
[table 3]
[table 4-1]
[table 4-2]
[table 4-3]
[table 4-4]
[table 5-1]
[table 5-2]
As show shown in the 5-1, embodiment No.1～18th, example of the present invention, because the content of each composition is in prescribed limit of the present invention, so the stability of the intensity of the fissility of slag, slag amount, weld metal, toughness, electric arc, low spatter, and anti-crackle all good, can access excellent weld job, the character excellence of the machinery of weld metal.
As show shown in the 5-2, No.19～47 depart from the scope of the present invention.Its C of comparative example No.19 is very few, the undercapacity of weld metal when thick plates.Its C amount of comparative example No.20 is superfluous, weld metal generation heat cracking, and because of superfluous intensity causes low malleablization, it is also many to splash when plate sheet welding, and arc stability is poor, and the protective gas spray nozzle clogging easily takes place, so the continuous welding deterioration.Its Si of comparative example No.21 is very few, the undercapacity of added metal when thick plates, and the slag fissility is also poor, causes electric arc instability, continuous welding deterioration because of slag hinders.Its Si of comparative example No.22 amount is superfluous, the toughness deficiency of weld metal, and the slag amount is superfluous and become obstacle and cause the electric arc instability, the continuous welding deterioration.Its Ti of comparative example No.23 is very few, and the generating capacity that splashes is many, and arc stability is poor, and the protective gas spray nozzle clogging easily takes place, so the continuous welding deterioration.Its Ti amount of comparative example No.24 is superfluous, and the slag amount is many, and fissility is also poor.The slag amount is superfluous and become obstacle and cause the electric arc instability, the continuous welding deterioration.Its Mn amount of comparative example No.25 is very few, and the toughness under the tensile strength of the weld metal when thick plates and any thickness of slab is all low.Its Mn surplus of comparative example No.26, the slag amount is many, and fissility is also poor.The slag amount is superfluous and become obstacle and cause the electric arc instability, the continuous welding deterioration.Comparative example No.27,28 its Mo surpluses cause the toughness deterioration owing to the intensity surplus when plate sheet welding.Its S of comparative example No.29 is very few, and the fissility of slag is poor, and slag becomes obstacle and causes the electric arc instability, the continuous welding deterioration.Its S surplus of comparative example No.30, toughness is low but also heat cracking has taken place.Although the slag fissility is good, adhere in pelletized form and change, increase the stability that diminishes electric arc because of thickness.Consequently continuous welding deterioration.Its O surplus of comparative example No.31, the slag amount increases.The stability of infringement electric arc, the continuous welding deterioration.Field trash surplus in the weld metal, heat cracking takes place.Its P of comparative example No.32 is very few, and the fissility of slag is poor, and slag becomes obstacle and causes the electric arc instability, the continuous welding deterioration.Its P surplus of comparative example No.33, toughness is low and heat cracking taken place.Although the slag fissility is good, adhere in pelletized form and change, increase the stability that diminishes electric arc because of thickness.Consequently continuous welding deterioration.Its Cu surplus of comparative example No.34, heat cracking takes place, and the slag fissility is also poor, and slag becomes obstacle and causes the electric arc instability, the continuous welding deterioration.Its B deficiency of comparative example No.35, the toughness deficiency when intensity during thick plates and plate sheet welding.Its B surplus of comparative example No.36, heat cracking takes place.Although comparative example No.37 is its C, B satisfies prescribed limit, P respectively separately
CB=(deficiency of C+15 * B), the undercapacity during thick plates.Although comparative example No.38 is its C, B satisfies prescribed limit, P respectively separately
CB=(surplus of C+15 * B), heat cracking takes place.Comparative example No.39～No.43 is Nb, V, Al, Cr, Ni surplus respectively, and the slag amount increases, and fissility also reduces.Slag becomes obstacle and causes the electric arc instability, the continuous welding deterioration.Intensity surplus when plate sheet welding, toughness also reduces.Its MoS of comparative example No.44
2The adhesion amount surplus, giving of pipe lining etc. is that MoS is arranged
2Pile up and stop up, welding wire is given very unstable.Consequently arc stability is impaired, and slag skewness one is changed and caused harmful effect, and fissility reduces.Splashing amount also increases.Its Ti of No.45, Mn, O surplus, S is very few.The slag amount increases and fissility reduces significantly, and slag becomes obstacle and causes the electric arc instability, the continuous welding deterioration.The intensity surplus that too much causes because of Mn when plate sheet welding causes toughness also to reduce.Its Si of comparative example No.46 is very few, Mo, P surplus.Because the Si deficiency, so the slag fissility is poor, slag becomes obstacle and causes the electric arc instability, the continuous welding deterioration.Because the P surplus, so heat cracking takes place.In addition because the Mo surplus, so when plate sheet welding also with the intensity surplus, thin plate, slab toughness are all low.Its Ti of comparative example No.47, Mn surplus.The slag amount increases and fissility reduces significantly, and slag becomes obstacle and causes the electric arc instability, the continuous welding deterioration.The intensity surplus that too much causes because of Mn when plate sheet welding causes toughness also to reduce.Its Ti of comparative example No.48, Mn, Mo, B surplus.The slag amount increases and fissility reduces significantly, and slag becomes obstacle and causes the electric arc instability, the continuous welding deterioration.The intensity surplus that too much causes because of Mn, Mo, B when plate sheet welding causes toughness also to reduce.
Claims (4)
1. solid-core welding wire for carbon dioxide gas protection arc welding; it is characterized in that; contain that C:0.020～0.100 quality %, Si:0.65～1.10 quality %, Mn:1.40～1.74 quality %, P:0.005～0.018 quality %, S:0.007～0.020 quality %, Ti:0.11～0.18 quality %, B:0.0015～0.0073 quality %, C+15 * B:0.0600～0.1990 quality %, Mo:0.08 quality % are following, O:0.0100 quality % following, below the Cu:0.45 quality %, surplus is Fe and unavoidable impurities.
2. solid-core welding wire for carbon dioxide gas protection arc welding according to claim 1 is characterized in that, the content of Mo is below the 0.01 quality %.
3. solid-core welding wire for carbon dioxide gas protection arc welding according to claim 1; it is characterized in that, contain among the following Ni of following Cr of 0.08 quality % following Nb, 0.08 quality % following V, 0.08 quality % following Al, 0.50 quality % and 0.50 quality % more than at least a kind.
4. according to each described solid-core welding wire for carbon dioxide gas protection arc welding in the claim 1～3, it is characterized in that, have MoS at welding wire surface
2, its content has 0.01～1.00g in every 10kg welding wire.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-059285 | 2007-03-08 | ||
| JP2007059285 | 2007-03-08 | ||
| JP2007059285A JP5137426B2 (en) | 2007-03-08 | 2007-03-08 | Solid wire for carbon dioxide shielded arc welding |
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| Publication Number | Publication Date |
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| CN101259571A true CN101259571A (en) | 2008-09-10 |
| CN101259571B CN101259571B (en) | 2010-10-06 |
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| CN2008100051120A Active CN101259571B (en) | 2007-03-08 | 2008-01-22 | Solid soldering wire for carbon dioxide gas protection arc welding |
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|---|---|
| JP (1) | JP5137426B2 (en) |
| KR (1) | KR20080082501A (en) |
| CN (1) | CN101259571B (en) |
| TW (1) | TW200911443A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554497A (en) * | 2010-12-21 | 2012-07-11 | 中冶建筑研究总院有限公司 | Flux-cored wire for fine-grain high-strength steel bar CO2 arc welding |
| CN103600178A (en) * | 2013-11-27 | 2014-02-26 | 南车眉山车辆有限公司 | High-strength solid wire made of weathering resistant steel through gas shielded welding |
| 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 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103084754B (en) * | 2013-01-23 | 2016-04-27 | 宝山钢铁股份有限公司 | A kind of pipe line steel high-strength and high ductility welding wire for submerged-arc welding |
| JP6787171B2 (en) * | 2017-02-20 | 2020-11-18 | 日本製鉄株式会社 | Corrosion-resistant steel gas shield arc welding solid wire |
| CN110039219A (en) * | 2019-05-20 | 2019-07-23 | 丹阳市华龙特钢有限公司 | A kind of high-wearing feature welding material and preparation method thereof |
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| JPH07299583A (en) * | 1994-05-10 | 1995-11-14 | Kobe Steel Ltd | Plated wire for gas shield arc welding |
| JPH09168889A (en) * | 1995-12-21 | 1997-06-30 | Kobe Steel Ltd | Gas shielded arc welding wire |
| CN1058923C (en) * | 1997-05-26 | 2000-11-29 | 武汉钢铁(集团)公司 | Low-alloy high-strength and high-toughness submerged-arc welding electrode |
| 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 |
| CN1152767C (en) * | 2001-08-08 | 2004-06-09 | 武汉钢铁(集团)公司 | Microtitanium-boron high-toughness gas protective welding stick |
| 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 |
| KR100553380B1 (en) * | 2002-01-31 | 2006-02-20 | 제이에프이 스틸 가부시키가이샤 | Steel wire for carbon dioxide shielded arc welding and welding process using the same |
| US6784402B2 (en) * | 2002-03-27 | 2004-08-31 | Jfe Steel Corporation | Steel wire for MAG welding and MAG welding method using the same |
| 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 |
| CN1290661C (en) * | 2004-06-25 | 2006-12-20 | 武汉钢铁(集团)公司 | High strength high tenacity high weather resistant gas protecting welding wire |
| CN1970214A (en) * | 2006-12-05 | 2007-05-30 | 金秋生 | Gas protection welding wire for high-tensile structural steel |
-
2007
- 2007-03-08 JP JP2007059285A patent/JP5137426B2/en active Active
-
2008
- 2008-01-22 CN CN2008100051120A patent/CN101259571B/en active Active
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554497A (en) * | 2010-12-21 | 2012-07-11 | 中冶建筑研究总院有限公司 | Flux-cored wire for fine-grain high-strength steel bar CO2 arc welding |
| CN102554497B (en) * | 2010-12-21 | 2014-06-04 | 中冶建筑研究总院有限公司 | Flux-cored wire for fine-grain high-strength steel bar CO2 arc welding |
| CN103600178A (en) * | 2013-11-27 | 2014-02-26 | 南车眉山车辆有限公司 | High-strength solid wire made of weathering resistant steel through gas shielded welding |
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200911443A (en) | 2009-03-16 |
| TWI339603B (en) | 2011-04-01 |
| KR20080082501A (en) | 2008-09-11 |
| JP2008221241A (en) | 2008-09-25 |
| JP5137426B2 (en) | 2013-02-06 |
| CN101259571B (en) | 2010-10-06 |
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