CN1853845A - Hidden arc welding used smelting solder - Google Patents
Hidden arc welding used smelting solder Download PDFInfo
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- CN1853845A CN1853845A CN 200610075500 CN200610075500A CN1853845A CN 1853845 A CN1853845 A CN 1853845A CN 200610075500 CN200610075500 CN 200610075500 CN 200610075500 A CN200610075500 A CN 200610075500A CN 1853845 A CN1853845 A CN 1853845A
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Abstract
The invention discloses a smelting flux of hidden arc welding, which comprises the following parts: 10-40 wt% SiO<SUB>2</SUB>, 10-27 wt% CaO, 5-35 wt% CaF<SUB>2</SUB>, 3-20 wt% MgO, 9-35 wt% Al<SUB>2</SUB>O<SUB>3</SUB> and 1.5-20 wt% MgO. [A]=[CaO] /([SiO<SUB>2</SUB>]+[Al<SUB>2</SUB>O<SUB>3</SUB>]/2), wherein [A] is between 0.3 and 0.7, which is fit for high-strength current transverse welding.
Description
Technical field
Employed hidden arc welding used smelting solder (fused flux) when the present invention relates to a kind of welding posture and carrying out hidden arc welding in horizontal position welding, horizontal fillet welding and downhand welding etc., particularly relate to the welding petroleum storage with jar etc. columnar big shape barrel cage the time employed hidden arc welding used smelting solder.
Background technology
Recently because the consumption figure of oil enlarges, advanced the oil storage with jar maximization, the thing followed is to be used for the oil storage also to have by the tendency of thick filmization with the steel plate of jar., increase during Welder when jar building for this reason, thereby require to strengthen the efficient activity of welding procedure.
Yet in order to make the welding procedure efficient activity, when the bevel angle narrow welding of utilization as horizontal hidden arc welding carried out big electric current welding, weld part had heat cracking to take place easily, because will need to adjust after welding, efficiency of construction reduces.In addition, when utilizing the storage of hidden arc welding construction oil to use jar, be suitable for the various posture that horizontal position welding, horizontal fillet welding and downhand welding etc. are arranged, still must use the scaling powder of the special use of corresponding each posture, manage becoming complexity.For this reason, in big electric current welding, also be difficult to the welding material that has heat cracking to take place and require to have, and arbitrary posture of horizontal position welding, horizontal fillet welding and downhand welding scaling powder that all can be suitable for.
Therefore, once proposed, in the fysed flux that transverse weld when making with jar as the storage of cylindrical shape oil and horizontal fillet welding are used, mixed metal A l powder: the hidden arc welding of 0.1～1.0 quality % contains SiO with scaling powder (opening clear 61-202794 communique with reference to the spy) in this fysed flux
2: 20 quality % are above, MnO:8 quality % is above, F:1～14 quality %, TiO
2: below the 8 quality %, SiO
2+ Al
2O
3: 40～60 quality %, and the optional compound more than 2 kinds among the group of MnO, CaO, MgO and BaO composition, count 35～55 quality % with total amount.The scaling powder of document record by add a spot of metal A l powder in fysed flux, improves the setting temperature of weld metal, is difficult to hang down by making bead (bead), and prevents that the welding slag in the welding of narrow groove is mingled with.
In addition, also proposed horizontal hidden arc welding used smelting solder (opening clear 56-92000 communique), wherein, contained SiO with reference to the spy
2: 21～30 quality %, MgO:5～15 quality %, CaO:5～15 quality %, Al
2O
3: 21～30 quality % and CaF:20～30 quality %, and formation is defined as SiO
2+ Al
2O
3+ CaF:68～83 quality %, MnO is lower than the composition of 2 quality %, and makes volume density compare 1.4g/cm
3Greatly.In the scaling powder of document record, by making SiO
2, MnO, CaO, Al
2O
3And the content optimization of CaF, and the MgO that the flowability of welding slag is reduced by minimizing is even the solidifying in the factitious welding posture that downside carries out of column crystal, also can make the emersion of fusion welding slag become easy.
Yet, the problem points of showing is down arranged in described existing technology.The spy opens the scaling powder of putting down in writing in the clear 61-202794 communique, is particularly suitable for the welding of narrow groove, with respect to as 45 ° of general bevel angle, 35 ° of grooves also can be suitable for, and still, has only studied welding current and be 450 and even the scope of 500A.In addition, the spy opens the scaling powder of putting down in writing in the clear 56-92000 communique, does not carry out the research that is suitable for to horizontal fillet welding and downhand welding.For this reason, the spy opens the scaling powder of clear 61-202794 communique record, when being applied to welding current and being the horizontal position welding of the so big electric current of 550A, heat cracking might take place.In addition, pockmark (pockmark) and undercut (undercut) etc. when being applied to horizontal fillet welding and downhand welding, might take place in the scaling powder with the spy opens clear 56-92000 communique record.
Summary of the invention
The object of the invention is, in view of these problem points, proposes a kind of hidden arc welding used smelting solder, and it can be applied to the transverse weld of big electric current, and can be suitable in any welding posture kind of horizontal position welding, horizontal fillet welding and downhand welding.
Hidden arc welding used smelting solder of the present invention in the scaling powder gross mass, contains SiO
2: 10～40 quality %, CaO:10～27 quality %, CaF
2: 5～35 quality %, MgO:3～20 quality %, Al
2O
3: 9～35 quality % and MgO:1.5～20 quality %, and regulation TiO
2Be that (quality %) is made as [CaO] with CaO content, with SiO below the 6 quality %
2Content (quality %) is made as [SiO
2], with Al
2O
3Content (quality %) is made as [Al
2O
3] time, [A] that is expressed from the next is 0.3 and even 0.7.
[several 1]
[A]＝[CaO]/([SiO
2]+[Al
2O
3]/2)
In the present invention, because regulation SiO
2, CaO, CaF
2, MgO, Al
2O
3, MnO and TiO
2Content, and regulation is by the value of [A] of following formula 1 expression, so can make the setting temperature and the viscosity optimization of fusion welding slag.In view of the above, even carry out the transverse weld of big electric current, welding slag fissility and high-temperature cracking resistance are also good, can access the bead that does not have overlap (overlap) and undercut.In addition, in transverse weld, horizontal fillet welding and downhand welding whole, can access the stable bead that does not have overlap and undercut, and can access good welding slag fissility.Its result is for the high efficiency of welding is made great contribution.
This hidden arc welding used smelting solder, SiO
2Content can be 20～33 quality % of every scaling powder gross mass.In view of the above, in transverse weld, can access good welding slag fissility and bead shape, and can make the bead dimensionally stableization in horizontal fillet welding and the downhand welding.
In addition, CaO content can be made as 12～23 quality % of every scaling powder gross mass.In view of the above, welding slag forms the setting temperature and the viscosity of appropriateness, in transverse weld, horizontal fillet welding and downhand welding, can access good weld part.
In addition, CaF
2Content can be made as 10～28 quality % of every scaling powder gross mass.In view of the above, can access good welding slag fissility and bead shape.
Also have in addition, MgO content also can be made as 3～15 quality % of every scaling powder gross mass.In view of the above, can access good bead outward appearance, high-temperature cracking resistance and welding slag fissility.
Also has Al in addition
2O
3Content also can be made as 15～28 quality % of every scaling powder gross mass.In view of the above, in transverse weld, because the bead confining force grow of welding slag, the bead dimensionally stableization is so can access good bead outward appearance.
Also have in addition, MnO content can be made as 3～15 quality % of every scaling powder gross mass.In view of the above, can make the flowability of fusion welding slag and welding slag fissility good.
Also has TiO in addition
2Preferably be defined in below the 3 quality % of every scaling powder gross mass.In view of the above, in transverse weld, can access good welding slag fissility and X ray performance.
Also have in addition, [A] by following formula 1 expression can be made as 0.35～0.65.In view of the above, in transverse weld, can access good welding slag fissility and high-temperature cracking resistance, and can access the bead of the excellence that does not have overlap and undercut.
According to the present invention, because regulation SiO
2, CaO, CaF
2, MgO, Al
2O
3, MnO and TiO
2Content, and regulation is by the value of [A] of following formula 1 expression, so can make the setting temperature and the viscosity optimization of fusion welding slag, and can make the welding slag fissility good.Therefore, can both be suitable in any welding posture of horizontal position welding, horizontal fillet welding and downhand welding, even carry out big electric current transverse weld, welding slag fissility and high-temperature cracking resistance are also good, can access the bead that does not have overlap and undercut.
Description of drawings
Fig. 1 (a) be expression in the transverse weld the groove shape and the profile of electrode angle, be the profile of the laminating method in the expression transverse weld (b) and (c).
Fig. 2 (a) is the profile of the electrode angle in the expression horizontal fillet welding, (b) is the profile of the laminating method in the expression horizontal fillet welding.
Fig. 3 is the profile of the groove shape in the expression downhand welding.
Fig. 4 (a) is the sectional view that the expression heat cracking locates, and (b) is the profile according to the A-A line.
Fig. 5 (a) is the figure that locates that is illustrated in the overlap width in the transverse weld, (b) is the figure that is illustrated in the overlap width measurements position in the horizontal fillet welding.
Fig. 6 (a) is the figure that locates of the undercut degree of depth in the expression transverse weld, (b) is the figure that locates that is illustrated in the overlap width in the horizontal fillet welding, (c) is the figure that locates that is illustrated in the overlap width in the downhand welding.
The specific embodiment
Below, specifically describe this scaling powder of the mode of enforcement of the present invention.The scaling powder of present embodiment is to use the fysed flux in hidden arc welding.Below, the numerical definiteness reason that the one-tenth about the scaling powder of present embodiment is grouped into is described.
SiO
2: 10～40 quality %
SiO in the scaling powder
2Work as the welding slag binder, the viscosity of fusion welding slag is increased.In addition, the confining force that improves the bead in the transverse weld is arranged, make the effect of bead dimensionally stable.Yet, work as SiO
2When content was lower than 10 quality %, it is unstable that the viscosity deficiency of fusion welding slag and bead shape also become, and overlap and undercut take place.On the other hand, if SiO
2Content surpasses 40 quality %, and then the viscosity of fusion welding slag becomes too high, and the fissility of welding slag reduces, and pockmark and welding slag are mingled with generation.Thereby, establish SiO
2Content is 10～40 quality %.
In addition, SiO
2Content preferably is made as 20～33 quality %.If the SiO in the scaling powder
2Content increases, and then because vitreous welding slag forms, so welding slag becomes and is easy to fragmentation and the welding slag fissility improves, is that the viscosity of welding slag increases but then, and welding slag is mingled with the defective generation that waits.If establish SiO
2Content is 20～33 quality %, and then vitreous welding slag forms and the viscosity of welding slag becomes the state that is complementary, and in transverse weld, can access good welding slag fissility and bead shape, and in addition, the bead shape in horizontal fillet welding and downhand welding is also stable.
CaO:10～27 quality %
CaO has the effect of the setting temperature decline that makes the fusion welding slag and the effect that viscosity is descended, and by an amount of interpolation, thereby the welding slag fissility improves.Yet if the CaO content in the scaling powder surpasses 27 quality %, the confining force of bead reduces because of the viscosity step-down of fusion welding slag, so overlap will be easy to take place.In addition, when Ca content is lower than 10 quality %, because the setting temperature of the fusion welding slag in the transverse weld uprises, so if be applied to high electric current and welding at a high speed, then the bead shape becomes convex, and the generation frequency of heat cracking uprises, and welding slag fissility deterioration.The deterioration of this welding slag fissility all can take place in any welding posture of horizontal position welding, horizontal fillet welding and downhand welding.Thereby establishing CaO content is 10～27 quality %.
And CaO content preferably is made as 12～23 quality %.In view of the above, because can make the setting temperature of welding slag and viscosity scope, so no matter in transverse weld, horizontal fillet welding and downhand welding, all can obtain good weld part in appropriateness.
CaF
2: 5～35 quality %
CaF in the scaling powder
2, the flowability and the good effect of welding slag fissility that make the fusion welding slag are arranged.Yet, the CaF in scaling powder
2When content is lower than 5 quality %, can't obtain this effect, welding slag is molten to be ironed in the deterioration of the welding slag fissility of bead etc. and produces, and the viscosity of fusion welding slag uprises, and welding slag is mingled with generation.On the other hand, if CaF
2Content surpasses 35 quality %, and then the flowability of welding slag strengthens, and overlap and undercut take place, and gas componant increases and the pockmark generation.In addition, when high electric current and high-speed transverse weld, bead becomes convex, will cause heat cracking easily.Thereby, with CaF
2Content is made as 5～35 quality %.This CaF
2Content preferably is made as 10～28 quality %.In view of the above, can access good welding slag fissility and bead shape.
MgO:3～20 quality %
MgO in the scaling powder is the composition that helps the inhibition of overlap.Yet, when MgO content is lower than 3 quality %, can't obtain this effect, the overlap pilosity, particularly when high electric current and high-speed transverse weld, bead becomes convex, and heat cracking will take place easily.In addition, MgO makes the effect of welding slag hardening in addition, if MgO content surpasses 20 quality %, then welding slag fissility deterioration.Thereby, MgO content is made as 1.5～20 quality %.In addition, the higher limit of MgO content preferably is made as below the 15 quality %.In view of the above, can access good bead outward appearance, high-temperature cracking resistance and welding slag fissility.
Al
2O
3: 9～35 quality %
Al in the scaling powder
2O
3, forming agent and work as welding slag, the effect that has the viscosity that makes the fusion welding slag to promote in addition, also is the composition that helps the welding slag fissility to improve.Yet, the Al in scaling powder
2O
3When content is lower than 9 quality %, the viscosity deficiency, overlap and undercut take place.On the other hand, if Al
2O
3Content surpasses 35 quality %, and the then too high and mobile deterioration because the viscosity of welding slag becomes is so welding slag is mingled with and pockmark takes place.Thereby, with Al
2O
3Content is made as 9～35 quality %.And, Al
2O
3The preferable range of content is 15～28 quality %.In view of the above, in transverse weld,, can make the bead dimensionally stableization, so can access good bead outward appearance because the bead confining force of welding slag is very strong.
MnO:15～20 quality %
MnO in the scaling powder is the composition that helps the adjustment of the viscosity of fusion welding slag and welding slag fissility.Yet when the MnO content in scaling powder was lower than 1.5 quality %, the viscosity of fusion welding slag uprised, and welding slag is molten to be ironed in the deterioration of the welding slag fissility of bead etc. and produce.On the other hand, if MnO content surpasses 20 quality %, the then viscosity step-down of fusion welding slag, overlap and undercut generation.Thereby, MnO content is made as 1.5～20 quality %.In addition, the preferable range of MnO content is 3～15 quality %.In view of the above, can make the flowability of fusion welding slag and welding slag fissility good.
TiO
2: below the 6 quality %
If TiO
2Content surpasses 6 quality %, and then welding slag becomes and is difficult to fragmentation, welding slag fissility deterioration.Thereby, with TiO
2Content is defined in below the 6 quality %.In addition, TiO
2Content preferably is defined in below the 3 quality %.In view of the above, in transverse weld, can access good welding slag fissility.
[A]：0.30～0.70
In addition, in the scaling powder of present embodiment, will be made as 0.30～0.70 by [A] that following formula 1 provides.Also have, [CaO] in the following formula 1 is the CaO content (quality %) of every scaling powder gross mass, [SiO
2] be the SiO of every scaling powder gross mass
2Content (quality %), [Al
2O
3] be the Al of every scaling powder gross mass
2O
3Content (quality %).
[several 1]
[A]＝[CaO]/([SiO
2]+[Al
2O
3]/2)
Present inventors etc. carry out the result of experimental study with keen determination in order to address the above problem, and have found the following fact.Promptly, setting temperature by further rising fusion welding slag, and moderately reduce the viscosity of fusion welding slag, the setting rate of the fusion welding slag in the transverse weld of high electric current is increased, can prevent the heat cracking of motlten metal, no matter in transverse weld, horizontal fillet welding and downhand welding, can both obtain not having the stable bead of overlap and undercut, and the welding slag fissility is good.And, [A] shown in the following formula 1, that is, and CaO content ([CaO]) and SiO
2Content ([SiO
2]) and Al
2O
3Content ([Al
2O
3]/2) ratio has most important influence to bead shape and welding slag fissility.
CaO descends the fusing point of fusion welding slag and viscosity, and the effect that makes the welding slag fissility good is arranged.In addition, SiO
2Though lack the effect of the fusing point rising that makes the fusion welding slag, the effect that promotes viscosity is remarkable.In addition, Al
2O
3Though the effect of the fusing point that promotes the fusion welding slag is arranged, lacks the effect that promotes viscosity.If utilize so character, then for the viscosity of welding slag fissility and fusion welding slag, can be by CaO and SiO
2Content and regulate, for the viscosity of fusion welding slag, can be by CaO and Al
2O
3Content and regulate respectively.Therefore, in the fysed flux of present embodiment, for CaO, SiO
2And Al
2O
3Each oxide, its content separately is defined in above-mentioned scope, and regulation is as the scope of [A] of their ratio.
Be lower than at 0.30 o'clock at [A], the fusing point of fusion welding slag and viscosity become too high, and the bead shape becomes convex, and heat cracking becomes and takes place easily in transverse weld, and welding slag fissility deterioration.In addition, the disengaging from the welding slag layer of the gas componant that takes place when hindering welding, pockmark takes place.On the other hand, if [A] surpasses 0.70, the fusing point step-down of fusion welding slag then, and viscosity step-down, bead becomes and hangs down easily in transverse weld, in addition because there is the convex bead to form, so no matter in transverse weld, horizontal fillet welding and downhand welding, heat cracking, overlap and bead crawl etc. all to become and take place easily.
In addition, [A] preferably is made as 0.35～0.65.In view of the above, in transverse weld, good welding slag fissility and high-temperature cracking resistance can be accessed, in addition, the good bead of overlap and undercut can also be obtained not having.
Remove SiO
2, CaO, CaF
2, MgO, Al
2O
3, MnO and TiO
2Part be remainder.As the material that is contained in this remainder, can list Na
2O, K
2O, FeO, Cr
2O
3, P, S etc.Wherein, Na
2O and K
2O is useful on the stability that improves electric arc and the situation of adding.In this case, Na
2O:0.5～1.5%, K
2O:2～3% is a preferable range.Remove Na
2O and K
2Beyond the O, other all enter scaling powder as impurity.This remainder preferably is made as below 4.5% of scaling powder gross weight.
[embodiment]
Below, in the effect of embodiments of the invention, compare and illustrate with the comparative example that departs from the scope of the present invention.Fig. 1 (a) be expression in the transverse weld the groove shape and the profile of electrode angle, Fig. 1 (b) and (c) be the profile of the laminating method in the expression transverse weld.Also have, Fig. 2 (a) is the profile of the electrode angle in the expression horizontal fillet welding, and Fig. 2 (b) is the profile of the laminating method in the expression horizontal fillet welding.In addition, Fig. 3 is the profile of the groove shape in the expression downhand welding.
In the present embodiment, as Fig. 1 (a) and (b), one-tenth shown in the following table 1 is grouped into 2 pieces of steel plate 1a and the 1b that (JIS specification G 3115 SPV490) thickness is 25mm, use the welding wire 2 of the composition shown in the following table 2 (JIS specification Z3115 YS-M4) diameter as 3.2mm, and the embodiment shown in the following table 3 and the scaling powder of comparative example, by the hidden arc welding welding, carry out the transverse weld of 2 welding beads with the condition of the A shown in the following table 4.In addition, as Fig. 1 (a) and (c), to becoming to be grouped into 2 pieces of steel plate 11a and the 11b that thickness is 12mm shown in the following table 1, use the embodiment shown in welding wire 2 and the following table 3 and the scaling powder of comparative example, by the hidden arc welding welding, carry out the transverse weld of 3 welding beads with the condition of the B shown in the following table 4.At this moment, the angle of electrode tip 3 is 38 °, and bevel angle is 45 °, and the outstanding length t of welding wire 2 is 25～30mm.Also have, the 4a～4c shown in Fig. 1 (b) reaches (c) is a weld metal, and 4a is that the 1st welding bead, 4b are that the 2nd welding bead, 4c are formed by the 3rd welding bead.
[table 1]
| Steel grade | Steel plate is formed (quality %) | |||||
| C | Si | Mn | P | S | Remainder | |
| JIS G 3115 SPV490 | 0.14 | 0.25 | 1.30 | 0.009 | 0.001 | The Fe+ unavoidable impurities |
[table 2]
| Steel grade | Welding wire is formed (quality %) | ||||||
| C | Si | Mn | P | S | Mo | Remainder | |
| JIS Z3351 YS-M4 | 0.10 | 0.05 | 1.60 | 0.010 | 0.009 | 0.50 | The Fe+ unavoidable impurities |
[table 3]
| No | Scaling powder is formed (quality %) | [A] | ||||||||
| SiO 2 | CaO | CaF 2 | MgO | Al 2O 3 | MnO | TiO 2 | Remainder | |||
| Embodiment | 1 | 23.0 | 17.0 | 24.0 | 6.0 | 15.0 | 13.0 | 0.0 | 2.0 | 0.56 |
| 2 | 26.3 | 21.0 | 20.0 | 7.0 | 16.0 | 6.0 | 2.4 | 1.3 | 0.61 | |
| 3 | 23.1 | 16.4 | 16.9 | 10.1 | 21.4 | 7.2 | 2.4 | 2.5 | 0.49 | |
| 4 | 32.0 | 15.0 | 17.1 | 12.0 | 16.0 | 3.5 | 2.4 | 2.0 | 0.38 | |
| 5 | 24.3 | 15.2 | 17.0 | 10.1 | 22.0 | 7.3 | 1.0 | 3.1 | 0.43 | |
| 6 | 19.7 | 15.3 | 20.0 | 10.0 | 25.0 | 7.2 | 1.1 | 1.7 | 0.48 | |
| 7 | 33.3 | 15.3 | 14.9 | 10.2 | 18.0 | 7.2 | 0.0 | 1.1 | 0.36 | |
| 8 | 20.1 | 11.3 | 27.3 | 13.0 | 15.3 | 8.3 | 2.4 | 2.3 | 0.41 | |
| 9 | 29.1 | 25.5 | 10.3 | 3.2 | 23.3 | 3.4 | 2.4 | 2.8 | 0.63 | |
| 10 | 28.4 | 15.2 | 9.6 | 10.1 | 24.0 | 7.2 | 2.4 | 3.1 | 0.38 | |
| 11 | 24.7 | 15.3 | 28.4 | 6.3 | 15.0 | 4.3 | 2.4 | 3.6 | 0.48 | |
| 12 | 24.0 | 13.0 | 16.9 | 15.2 | 21.0 | 5.3 | 2.4 | 2.2 | 0.38 | |
| 13 | 29.0 | 16.3 | 17.0 | 10.1 | 14.8 | 6.6 | 2.4 | 3.8 | 0.45 | |
| 14 | 23.0 | 20.5 | 12.0 | 4.2 | 28.5 | 6.5 | 2.4 | 2.9 | 0.55 | |
| 15 | 25.6 | 19.6 | 21.6 | 10.1 | 15.5 | 2.6 | 2.4 | 2.6 | 0.59 | |
| 16 | 26.0 | 14.0 | 20.4 | 4.2 | 15.6 | 15.2 | 2.4 | 2.2 | 0.41 | |
| 17 | 22.4 | 14.5 | 27.3 | 7.8 | 16.7 | 5.4 | 3.2 | 2.7 | 0.47 | |
| 18 | 28.2 | 12.0 | 17.3 | 10.2 | 22.0 | 7.2 | 1.1 | 2.0 | 0.31 | |
| 19 | 28.2 | 13.0 | 14.9 | 9.8 | 22.3 | 7.2 | 2.2 | 2.4 | 0.33 | |
| 20 | 23.0 | 23.0 | 21.5 | 4.2 | 22.0 | 4.3 | 0.0 | 2.0 | 0.68 | |
| 21 | 22.0 | 19.7 | 16.9 | 11.4 | 16.0 | 8.6 | 2.4 | 3.0 | 0.66 | |
| Comparative example | 22 | 9.8 | 12.3 | 27.6 | 12.0 | 23.0 | 12.3 | 1.1 | 1.9 | 0.58 |
| 23 | 40.4 | 22.2 | 11.1 | 4.0 | 15.2 | 3.2 | 0.0 | 3.9 | 0.46 | |
| 24 | 20.1 | 9.9 | 28.0 | 13.4 | 15.1 | 9.8 | 2.0 | 1.7 | 0.36 | |
| 25 | 32.7 | 27.2 | 11.1 | 3.5 | 19.4 | 3.2 | 0.0 | 2.9 | 0.64 | |
| 26 | 28.4 | 15.3 | 4.1 | 10.1 | 27.8 | 7.6 | 2.8 | 3.9 | 0.36 | |
| 27 | 20.6 | 12.4 | 35.5 | 6.4 | 15.4 | 4.3 | 2.4 | 3.0 | 0.44 | |
| 28 | 28.4 | 15.3 | 19.0 | 1.2 | 21.0 | 9.0 | 2.4 | 3.7 | 0.39 | |
| 29 | 21.4 | 12.1 | 16.9 | 23.0 | 16.0 | 5.3 | 2.4 | 2.9 | 0.41 | |
| 30 | 29.0 | 16.5 | 22.1 | 10.1 | 8.8 | 7.6 | 2.4 | 3.5 | 0.49 | |
| 31 | 23.0 | 15.3 | 12.0 | 4.2 | 35.4 | 4.5 | 2.4 | 3.2 | 0.38 | |
| 32 | 28.1 | 19.6 | 21.6 | 10.1 | 15.5 | 1.0 | 2.4 | 1.7 | 0.55 | |
| 33 | 20.8 | 13.4 | 24.4 | 3.2 | 15.6 | 20.1 | 0.0 | 2.5 | 0.47 | |
| 34 | 21.0 | 14.5 | 25.8 | 7.8 | 167 | 5.4 | 6.3 | 2.5 | 0.49 | |
| 35 | 32.1 | 12.0 | 17.3 | 6.4 | 22.0 | 7.2 | 1.1 | 1.9 | 0.28 | |
| 36 | 32.1 | 13.0 | 13.4 | 6.3 | 25.4 | 7.2 | 0.0 | 2.6 | 0.29 | |
| 37 | 21.1 | 23.0 | 21.5 | 4.2 | 22.0 | 4.3 | 0.0 | 3.9 | 0.72 | |
| 38 | 20.4 | 19.9 | 16.3 | 11.4 | 15.2 | 13.4 | 2.4 | 1.0 | 0.71 | |
| 39 | 28.4 | 17.0 | 4.1 | 7.4 | 36.0 | 1.0 | 2.8 | 3.3 | 0.37 | |
| 40 | 23.0 | 9.7 | 35.5 | 3.4 | 13.4 | 4.3 | 9.0 | 1.7 | 0.33 | |
| 41 | 26.5 | 17.0 | 23.0 | 1.2 | 10.0 | 16.0 | 2.4 | 3.9 | 0.54 | |
| 42 | 21.3 | 9.0 | 18.9 | 23.0 | 15.4 | 6.1 | 2.4 | 3.9 | 0.31 | |
| 43 | 28.2 | 15.3 | 24.5 | 10.2 | 8.0 | 7.2 | 3.1 | 3.5 | 0.48 | |
| 44 | 41.0 | 15.2 | 16.9 | 2.0 | 16.0 | 4.0 | 2.4 | 2.5 | 0.31 | |
[table 4]
| Welding direction | Condition | Number of weld passes | Electric current (A) | Voltage (V) | Speed (cm/ branch) | Electric power polarity |
| Laterally | A | 1 | 420 | 28 | 30 | DCEP |
| 2 | 550 | 28 | 40 | |||
| B | 1 | 350 | 22 | 35 | DCEP | |
| 2 | 450 | 25 | 40 | |||
| 3 | 450 | 25 | 40 |
In addition, as Fig. 2 (a) and (b), one-tenth shown in the above-mentioned table 1 is grouped into the steel plate 11a that thickness is 12mm, with become to be grouped into the steel plate 21 that thickness is 16mm shown in the above-mentioned table 1, use the welding wire 12 of the composition diameter shown in the above-mentioned table 2 as 2.4mm, and the embodiment shown in the above-mentioned table 3 and the scaling powder of comparative example, by the hidden arc welding welding, carry out horizontal fillet welding with the condition shown in the following table 5.At this moment, the angle of electrode tip 3 is 60 °, and the outstanding length t of welding wire 12 is 23～28mm.Also have, the 14a～14c shown in Fig. 2 (b) is a weld metal, and 14a is that the 1st welding bead, 14b are that the 2nd welding bead, 14c are formed by the 3rd welding bead.
[table 5]
| Welding direction | Number of weld passes | Electric current (A) | Voltage (V) | Speed (cm/ branch) | Electric power polarity |
| Horizontal angle | 1 | 400 | 30 | 30 | DCEP |
| 2 | 420 | 30 | 40 | ||
| 3 | 420 | 30 | 45 |
Also have in addition, as shown in Figure 3, one-tenth shown in the above-mentioned table 1 is grouped into 2 pieces of steel plate 11c and the 11d that thickness is 12mm, use the welding wire 2 of the composition diameter shown in the above-mentioned table 2 as 3.2mm, and the embodiment shown in the above-mentioned table 3 and the scaling powder of comparative example, by the hidden arc welding welding, carry out downhand welding with the condition shown in the following table 6.At this moment, bevel angle is 50 °.Then, in these transverse weld, horizontal fillet welding and downhand welding, estimate weld job (welding slag fissility, heat cracking, overlap, pockmark, welding slag are mingled with and undercut).
[table 6]
| Welding direction | Number of weld passes | Electric current (A) | Voltage (V) | Speed (cm/ branch) | Electric power polarity |
| Downwards | 1 | 400 | 30 | 30 | DCEP |
Below, the evaluation criterion of projects is described.
The welding slag fissility
The welding slag fissility, just can allow the ◎ that is made as that welding slag peels off easily if impact with iron hammer, the welding slag that utilizes cutter (chipper) to wait is peeled off special-purpose instrument and is made as zero by what welding slag was peeled off, the tool using welding slag also be not easy to peel off or when bead, have welding slag molten iron be *.Also have, in transverse weld, condition A is estimated.
Heat cracking
For heat cracking, only estimate the transverse weld under condition A.Fig. 4 (a) is the sectional view that the expression heat cracking locates, and Fig. 4 (b) is the profile according to the A-A line.Also have, at Fig. 4 (a) and (b), for the ease of with the aid of pictures, and the hachure (hatching) of omission weld metal 4a and 4b.As Fig. 4 (a) and (b), the evaluation of heat cracking, in every 1m weld length, the sealing wire direction of the 2nd welding bead do not have the ◎ that is made as of crackle 5, the length x of crackle 5 be 1～10mm be made as zero, the length x of crackle 5 surpasses 10mm is *.Also have, the crackle 5 among the weld metal 4b sees through test by radioactive ray and detects.
Overlap
Overlap is estimated transverse weld under condition B and horizontal fillet welding.Fig. 5 (a) is the figure that locates that is illustrated in the overlap width in the transverse weld, and Fig. 5 (b) is the figure that is illustrated in the overlap width measurements position in the horizontal fillet welding.The evaluation of overlap will not have the ◎ that is made as of overlap, Fig. 5 (a) and (b) shown in swelling and hanging down of either of the testes width y be 1～4mm be made as zero, swelling and hanging down of either of the testes width y surpass being made as of 4mm *.
Undercut
Fig. 6 (a) is the figure that locates of the undercut degree of depth in the expression transverse weld, and Fig. 6 (b) is the figure that locates that is illustrated in the overlap width in the horizontal fillet welding, and Fig. 6 (c) is the figure that locates that is illustrated in the overlap width in the downhand welding.The evaluation of undercut shown in Fig. 6 (a)～(c), is measured the weld metal 4c, the 14c that are formed by final welding bead and 24 undercut depth z, and the undercut depth z is lower than the ◎ that is made as of 0.2mm, more than 0.2mm but be lower than 0.5mm be made as zero, being made as more than the 0.5mm *.Also have, in transverse weld, condition B is estimated.
Welding slag is mingled with
Be mingled with for welding slag, transverse weld under condition B and horizontal fillet welding are estimated.The evaluation that welding slag is mingled with is carried out radioactive ray and is seen through test, the quantity that the above welding slag of counting 2mm is mingled with.Consequently, every 1m sealing wire will not have the ◎ that is made as that the above welding slag of 2mm is mingled with, have more than 1 but be lower than 5 be made as zero, have being made as more than 5 *.
Pockmark
About pockmark, every 1m weld length is the ◎ that is made as below 4 with the quantity of the pockmark more than the 1mm, 5～9 be made as being made as more than zero, 10 *.Also have, in transverse weld, estimate for condition B.
Above result concentrates expression by following table 7.
Table 7]
Shown in above-mentioned table 7, as the scaling powder of the No.1～No.21 of embodiments of the invention, no heat cracking, no matter weld job is all good in transverse weld, horizontal fillet welding and downhand welding.The scaling powder of No.1～No.5 particularly is because CaO content, CaF
2Content, MgO content, Al
2O
3Content, MnO content, TiO
2Content and [A] all are preferable range, so compare high-temperature cracking resistance and weld job excellence with other scaling powder.
With respect to this, as the scaling powder of the No.22 of comparative example of the present invention, because SiO
2Content lacks than scope of the present invention, so the viscosity deficiency of fusion welding slag, in transverse weld, horizontal fillet welding and downhand welding, overlap and undercut take place.The scaling powder of No.23 in addition is because SiO
2Content is more than scope of the present invention, so the viscosity of fusion welding slag is too high, and welding slag fissility deterioration, welding slag is mingled with and the pockmark generation in addition.
The scaling powder of No.24, because CaO content lacks than scope of the present invention, thus welding slag fissility deterioration, and heat cracking takes place.On the other hand, the scaling powder of No.25, because CaO content exceeds scope of the present invention, so the viscosity of welding slag reduces, overlap takes place.The scaling powder that also has No.26 is because CaF
2Content lacks than scope of the present invention, the fissility deterioration of welding slag so the flowability of welding slag reduces, and welding slag is mingled with generation.On the other hand, the scaling powder of No.27 is because CaF
2Content exceeds scope of the present invention, so the flowability of welding slag increases, overlap and undercut take place, and by the increase of heat cracking and gas componant produce pockmark take place.
The scaling powder of No.28, because MgO content lacks than scope of the present invention, so overlap and heat cracking take place, on the other hand, the scaling powder of No.29 is because MgO content exceeds scope of the present invention, so the hardening of fusion welding slag and welding slag fissility deterioration.In addition, the scaling powder of No.30 is because Al
2O
3Content lacks than scope of the present invention, so the viscosity of welding slag reduces, overlap and undercut take place.On the other hand, the scaling powder of No.31 is because Al
2O
3Content exceeds scope of the present invention, so the viscosity height of fusion welding slag, welding slag is mingled with generation.
The scaling powder of No.32 is because MnO content lacks than scope of the present invention, so the viscosity of fusion welding slag uprises welding slag fissility deterioration.On the other hand, the scaling powder of No.33, because MnO content exceeds scope of the present invention, so the viscosity step-down of fusion welding slag, overlap and undercut take place.In addition, the scaling powder of No.34 is because TiO
2Content exceeds scope of the present invention, so welding slag fissility deterioration.
The scaling powder of No.35 and No.36, because [A] is littler than scope of the present invention, so the fusing point of fusion welding slag and viscosity uprise, heat cracking takes place, welding slag fissility deterioration.In addition, become and hinder the disengaging of gas componant easily, thereby pockmark takes place to the welding slag layer.On the other hand, the scaling powder of No.37 and No.38, because [A] exceeds scope of the present invention, so the fusing point of fusion welding slag and viscosity step-down, the welding bead hangs down and becomes the convex shape when transverse weld, and heat cracking takes place, and undercut and overlap take place in addition.
The scaling powder of No.39 is because CaF
2, Al
2O
3Reach MgO content outside scope of the present invention, thus the viscosity height of fusion welding slag, welding slag fissility deterioration, and welding slag is mingled with generation.In addition, the scaling powder of No.40 is because CaO, CaF
2And TiO
2Content outside scope of the present invention, so the setting temperature of fusion welding slag uprise, and viscosity step-down, heat cracking takes place, the welding slag fissility is deterioration also.In addition, the scaling powder of No.41 is because the content of MgO lacks than scope of the present invention, so heat cracking and overlap take place.
The scaling powder of No.42 is because CaO and MgO content exceed scope of the present invention, so the freezing point of fusion welding slag uprises welding slag fissility deterioration, and heat cracking also takes place.In addition, the scaling powder of No.43 is because Al
2O
3Content lacks than scope of the present invention, so fusion welding slag viscosity reduces, overlap and undercut take place, and in addition, the scaling powder of No.44 is because SiO
2Content exceeds scope of the present invention, so the viscosity of welding slag uprises welding slag fissility deterioration, and pockmark and welding slag are mingled with generation.
Claims (10)
1, a kind of hidden arc welding used smelting solder is characterized in that,
In the solder flux gross mass, contain
SiO
2: 10～40 quality %,
CaO:10～27 quality %,
CaF
2: 5～35 quality %,
MgO:3～20 quality %,
Al
2O
3: 9～35 quality %, and
MgO:1.5～20 quality %, and control
TiO
2: below the 6 quality %, and
In quality %, CaO content is expressed as [CaO], with SiO
2Content is expressed as [SiO
2], with Al
2O
3Content is expressed as [Al
2O
3] time, [A] that is expressed from the next is 0.3～0.7,
[A]＝[CaO]/([SiO
2]+[Al
2O
3]/2)。
2, according to the hidden arc welding used smelting solder of claim 1 record, it is characterized in that SiO
2Content is 20～33 quality % of solder flux gross mass.
3, according to the hidden arc welding used smelting solder of claim 1 record, it is characterized in that CaO content is 12～23 quality % of solder flux gross mass.
4, according to the hidden arc welding used smelting solder of claim 1 record, it is characterized in that CaF
2Content is 10～28 quality % of solder flux gross mass.
5, according to the hidden arc welding used smelting solder of claim 1 record, it is characterized in that MgO content is 3～15 quality % of solder flux gross mass.
6, according to the hidden arc welding used smelting solder of claim 1 record, it is characterized in that Al
2O
3Content is 15～28 quality % of solder flux gross mass.
7, according to the hidden arc welding used smelting solder of claim 1 record, it is characterized in that MnO content is 3～15 quality % of solder flux gross mass.
8, according to the hidden arc welding used smelting solder of claim 1 record, it is characterized in that, TiO
2Be controlled at below the 3 quality % of solder flux gross mass.
9, according to the hidden arc welding used smelting solder of claim 1 record, it is characterized in that [A] is 0.35～0.65.
10, according to the hidden arc welding used smelting solder of claim 1 record, it is characterized in that,
In every scaling powder gross mass, contain SiO
2: 20～33 quality %, CaO:12～23 quality %, CaF
2: 10～28 quality %, MgO:3～15 quality %, Al
2O
3: 15～28 quality % and MgO:3～15 quality %, and with TiO
2Be controlled at below the 3 quality %, [A] is 0.35～0.65.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005132241 | 2005-04-28 | ||
| JP2005132241A JP4553787B2 (en) | 2005-04-28 | 2005-04-28 | Fused flux for submerged arc welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1853845A true CN1853845A (en) | 2006-11-01 |
| CN100453248C CN100453248C (en) | 2009-01-21 |
Family
ID=37194462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100755007A Active CN100453248C (en) | 2005-04-28 | 2006-04-21 | Hidden arc welding used smelting solder |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4553787B2 (en) |
| CN (1) | CN100453248C (en) |
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| JPS4989644A (en) * | 1972-12-27 | 1974-08-27 | ||
| JPS5856679B2 (en) * | 1976-12-28 | 1983-12-16 | 新日本製鐵株式会社 | Melt flux for submerged arc welding |
| JPS61180694A (en) * | 1985-02-05 | 1986-08-13 | Kobe Steel Ltd | Fused flux for submerged arc welding |
| JPS62197296A (en) * | 1986-02-20 | 1987-08-31 | Kobe Steel Ltd | Flux for submerged arc welding of low-alloy heat-resisting steel |
| JPS63264296A (en) * | 1987-04-21 | 1988-11-01 | Nippon Steel Corp | Fused flux for submerged arc welding having excellent high temperature crack resistant characteristic |
| US5004884A (en) * | 1988-12-28 | 1991-04-02 | Kawasaki Steel Corporation | Method of submerged arc welding a thick steel plate with large heat input and submerged arc welding flux |
| JPH0631481A (en) * | 1992-07-21 | 1994-02-08 | Kawasaki Steel Corp | Flux for welding |
| JP2667636B2 (en) * | 1994-05-13 | 1997-10-27 | 株式会社神戸製鋼所 | Molten flux for submerged arc welding |
| JPH0985488A (en) * | 1995-09-27 | 1997-03-31 | Kobe Steel Ltd | Fused flux for submerged arc welding |
| JPH09262692A (en) * | 1996-03-28 | 1997-10-07 | Kobe Steel Ltd | Fused flux for submerged arc welding |
| JP3836071B2 (en) * | 2002-11-07 | 2006-10-18 | 株式会社神戸製鋼所 | Single electrode single-sided submerged arc welding method |
-
2005
- 2005-04-28 JP JP2005132241A patent/JP4553787B2/en not_active Expired - Fee Related
-
2006
- 2006-04-21 CN CNB2006100755007A patent/CN100453248C/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN100453248C (en) | 2009-01-21 |
| JP4553787B2 (en) | 2010-09-29 |
| JP2006305604A (en) | 2006-11-09 |
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