CN101100022A - Solid welding wire - Google Patents
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- CN101100022A CN101100022A CNA2007101081631A CN200710108163A CN101100022A CN 101100022 A CN101100022 A CN 101100022A CN A2007101081631 A CNA2007101081631 A CN A2007101081631A CN 200710108163 A CN200710108163 A CN 200710108163A CN 101100022 A CN101100022 A CN 101100022A
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Abstract
The present invention relates to a solid cored welding wire, which is arranged with a cementite layer on the surface. The cementite layer contains 0.005% to 0.10% carbon by weight of the whole welding wire and below 0.010% oxygen by weight of the whole welding wire. Getting rid of the cementite layer, the welding wire contains carbon: 0.005% to 0.150% by weight, Si: 0.4% to 1.2% by weight, Mn: 1.0% to 2.2% by weight, the other components is Fe and inevitable impurity. The solid cored welding wire can ensure the welding dripping be transition stable and reduces splash occurring amount when implementing gas protecting arc welding with high current using CO2 as protecting gas.
Description
Technical field
The present invention relates to a kind of solid core welding wire, particularly molten drop transitional excellent during the weld job under high electric current, the surface treatment oil for solid wire for gas shielded arc welding that the generating capacity that splashes is few.
Background technology
All the time, as the welding wire that gas shielded arc welding is used, what mainly use is to have implemented copper-plated welding wire on the surface.Because in welding wire surface copper facing, so the electric conductivity of welding wire is good.In the welding wire feeding system capillary copper thorn can take place, have the such problem of welding wire feeding difficulty that makes.In addition, with CO
2Use as protective gas, and when welding than higher electric current, has implemented in the copper-plated welding wire on the surface, when particularly using the YGW11 of JIS Z3312, existed the generating capacity that splashes in the unstable welding of transition of molten drop of welding wire to increase such problem points.
In order to address this problem, do not implemented to disclose in the copper-plated welding wire technology as follows on the surface.
For example, a kind of welding wire is disclosed in special public clear 59-13956 communique and the special public clear 59-13957 communique, it is good for the feeding and the resistance to rust that make welding wire, and makes the be covered mixture of pulverous sulphur and graphite etc. of welding wire surface, the lubricant of fluorine system and other antirust wet goods.
In addition, disclosed technology is by establish carburized layer at welding wire surface the case hardness of welding wire to be risen in the Te Kaiping 7-40081 communique, thereby the sliding of welding wire is improved, in addition, on this carburized layer, be full of cracks is set, make in this be full of cracks to keep kollag or lubricating oil, further improve welding wire feeding thus.
It is to make the free C of welding wire surface lining that the spy opens in the 2000-141080 communique disclosed technology, and the capillary reduction of the molten drop when suppressing welding is so that the generating capacity that splashes reduces.
Yet there are the following problems in the above-mentioned prior art.Use the welding wire under special public clear 59-13956 communique and the disclosed technical support of special public clear 59-13957 communique, still can not reduce and use CO
2The splash generating capacity of gas during as the high electric current welding of protective gas.
In addition, the spy opens disclosed technology in the flat 7-40081 communique, does not have to study to be accompanied by Carburization Treatment and to have high concentration oxygen to be attached to the possibility on the surface of welding wire.Oxygen concentration if be accompanied by that welding wire surface carries out carburizing at welding wire surface uprises, and then the result is because the surface tension of molten drop reduces, thereby the molten drop shakiness, and existence can not make the generating capacity that splashes reduce such problem points fully.
In addition, the spy opens the problem points that disclosed technology exists in the 2000-141080 communique and is,, reduces so suppress the surface tension of molten drop in welding at welding wire surface lining C for only, reduces in order to make the generating capacity that splashes, and can not obtain sufficient C amount.
Summary of the invention
The present invention carries out in view of these problem points, and its purpose is, a kind of use CO is provided
2Gas is as protective gas, and when carrying out gas shielded arc welding with high electric current, can make the droplet transfer stable, the solid core welding wire that the generating capacity that splashes is reduced.
Solid core welding wire of the present invention, has carburized layer on the surface, stipulate that it is the C of 0.005～0.10 quality % that described carburized layer contains with respect to the welding wire total quality, the O that described carburized layer contains with respect to the welding wire total quality for being lower than 0.010 quality %, the welding wire inside of removing described carburized layer has following composition: with respect to the welding wire total quality, contain C:0.005～0.150 quality %, Si:0.4～1.2 quality %, Mn:1.0～2.2 quality %, surplus is Fe and unavoidable impurities.
The solid core welding wire that the present invention is other, be defined in the surface and have carburized layer, it is the C of 0.005～0.05 quality % that described carburized layer contains with respect to the welding wire total quality, the O that described carburized layer contains is lower than 0.005 quality % with respect to the welding wire total quality, the welding wire inside of removing described carburized layer has following composition: with respect to the welding wire total quality, contain C:0.01～0.06 quality %, Si:0.5～1.0 quality %, Mn:1.4～2.0 quality %, Ti:0.10～0.30 quality %, S:0.001～0.030 quality %, O:0.001～0.030 quality %, surplus is Fe and unavoidable impurities.
According to the present invention, even using CO
2Gas is as protective gas, and when carrying out gas shielded arc welding with high electric current, also can appropriateness keeps the surface tension of molten drop, and the generating capacity that splashes is reduced.
Description of drawings
Fig. 1 has carried out the composition reflection that the cross section of the wire rod that carburizing and quenching handles is videoed and observed after to middle wire drawing by the electron ray differential analyzer.
Fig. 2 is the condition determination of line analysis is carried out in expression to wire rod by EPMA a ideograph.
Fig. 3 is illustrated under the condition determination shown in Figure 2 the figure of an example that wire rod is carried out the measurement result of line analysis by EPMA.
The specific embodiment
Below, specifically describe with regard to embodiments of the present invention.Solid core welding wire of the present invention, its formation is as follows: the interior atmosphere of stove of the wire rod after the wire drawing in the middle of disposing is in below the 1Torr, temperature in the stove is risen, in stove, directly carry out the carburizing and quenching processing behind the interpolation carburizing gas, this wire rod is carried out final wire drawing.About making the temperature and time of wire rod carburizing, by various experiments as can be known, consider the surface densification of the C that handles along with this carburizing and quenching and subsequent the situation of wire drawing, in the temperature of 650～900 ℃ scopes, be advisable in 10 seconds～10 minutes.Fig. 1 has carried out after middle wire drawing in the wire rod of carburizing and quenching processing, by electron ray differential analyzer (EPMA) to the length direction of the wire rod cross section of orthogonal (cross section) composition reflection of videoing and observing mutually, Fig. 2 is that expression is carried out the ideograph of the condition determination of line analysis by EPMA to wire rod, and Fig. 3 is illustrated under the condition determination shown in Figure 2 the figure of an example that wire rod is carried out the measurement result of line analysis by EPMA.
Handle by above-mentioned carburizing and quenching, as shown in Figure 1, can access the wire rod that has the carburized layer of several μ m～low oxygen concentration that tens of μ m are thick on the surface.For this wire rod, as shown in Figure 2, carry out line analysis by the central part of wire rod by EPMA, continuity ground detects the characteristic X-ray of Fe and O, can access each characteristic X-ray intensity thus.At this, 1.5 times part of the characteristic X-ray intensity of the C of the central part that detected characteristic X-ray intensity is wire rod is considered as carburized layer.That is, when periphery was watched the characteristic X-ray intensity wire rod of C, 1.5 times the position that detects characteristic X-ray intensity relatively first and be the characteristic X-ray intensity of the C that the central part of wire rod is average was considered as carburized layer by the part of perimeter sides from the central part of wire rod.By wire rod above-mentioned, have the carburized layer of several μ m～low oxygen concentration that tens of μ m are thick on the surface is carried out final wire drawing, can form solid core welding wire of the present invention.The feature of this wire rod shown in Fig. 1,2 is also inherited by the solid core welding wire of end article.
At first, the solid core welding wire (Fe-C-Si-Mn series solder wire) for first embodiment of the present invention describes.So, at first the solid core welding wire with regard to embodiments of the present invention describes at the C of the formed carburized layer of welding wire surface and the composition qualification reason of O.Here, the content of C, the O C, the O that are expressed as carburized layer respectively and are comprised all amount with respect to the ratios of welding wire total quality.
" C:0.005～0.100 quality % "
C can make the surface tension of molten drop keep appropriately effectively.Particularly use CO
2When carrying out gas shielded arc welding as protective gas, CO under the welding arc effect
2Gas is decomposed, and near the atmosphere the molten drop is in CO
2, CO, O admixture.At this moment,, then hinder molten drop and absorb oxygen, therefore avoided the capillary reduction of molten drop if copper facing is implemented on the surface of welding wire.When copper facing is not implemented on the surface of welding wire, in order to stop the intrusion of oxygen, and, if possible then effectively has oxygen-free carburized layer at the content of the surface of welding wire regulation oxygen to this molten drop.In this carburized layer, then poor if C content is below 0.005 quality % for the distribution uniformity of this C of surface of welding wire, if it is C content surpasses 0.100%, then rapid as the deterioration of the weldability of weld metal.Therefore, the C content of carburized layer is 0.005～0.100 quality %.
" O: be lower than 0.010 quality % "
The same with the action effect of C in the above-mentioned infiltration layer layer, the content of O is defined as is lower than 0.010 quality %, the surface tension of molten drop is suitably changed.Particularly the O in the carburized layer is for the capillary influence of molten drop, than decomposing CO because of welding arc
2The generation of the O that gas brings and O want big to the pairing influence of the intrusion of molten drop.If O content surpasses 0.010 quality %, then the surface tension of molten drop sharply reduces, and becomes the reason of splashing and taking place.Therefore, the O content of carburized layer is defined as and is lower than 0.010 quality %.
Secondly, in the solid core welding wire (Fe-C-Si-Mn series solder wire) of present embodiment, the composition of the welding wire inside beyond the carburized layer on surface added reason and forms limiting reason and describe.Here, the content of each element is expressed as the ratio of whole amounts of each element that the welding wire inside except that carburized layer comprised with respect to the welding wire total quality respectively.
" C:0.005～0.150 quality % "
C is the surface tension that can suitably keep molten drop, has the element that making the reduction effect of splashing.If the C content of welding wire inside is lower than 0.005 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.On the other hand, if the C content of welding wire inside surpasses 0.150 quality %, then generating capacity increases because thickization of molten drop causes splashing.In addition, also cause the intensity of wire rod to uprise, the stringiness deterioration when welding wire is made.Therefore, the C content of welding wire inside is 0.005～0.150 quality %.
" Si:0.4～1.2 quality % "
Si is the surface tension that can suitably keep molten drop, has the element that making the reduction effect of splashing.If the Si content of welding wire inside is lower than 0.4 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.On the other hand, if the Si content of welding wire inside surpasses 1.2 quality %, then generating capacity increases because thickization of molten drop causes splashing.In addition, also cause the intensity of wire rod to uprise, the stringiness deterioration when welding wire is made.Therefore, the Si content of welding wire inside is 0.4～1.2 quality %.
" Mn:1.0～2.2 quality % "
Mn is the surface tension that can suitably keep molten drop, has the element that making the reduction effect of splashing.If the Mn content of welding wire inside is lower than 1.0 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.On the other hand, if the Mn content of welding wire inside surpasses 2.2 quality %, then generating capacity increases because thickization of molten drop causes splashing.In addition, also cause the intensity of wire rod to uprise, the stringiness deterioration when welding wire is made.Therefore, the Mn content of welding wire inside is 1.0～2.2 quality %.
In the present embodiment, to the observation of videoing of the cross section of welding wire, confirm homogeneity by the electron ray differential analyzer at the surperficial formed carburized layer of welding wire.
Next, the solid core welding wire (Fe-C-Si-Mn-Ti-S-O series solder wire) to second embodiment of the present invention describes.At first, limiting reason for the composition of the C of the surperficial formed carburized layer of the solid core welding wire of present embodiment and O describes.Here, the content of C, the O C, the O that are expressed as carburized layer respectively and are comprised all amount with respect to the ratios of welding wire total quality.
" C:0.005～0.05 quality % "
C can make the surface tension of molten drop keep appropriately effectively.Particularly use CO
2When carrying out gas shielded arc welding as protective gas, CO under the welding arc effect
2Gas is decomposed, and near the atmosphere the molten drop is in CO
2, CO, O admixture.At this moment,, then hinder molten drop and absorb oxygen, therefore avoided the capillary reduction of molten drop if copper facing is implemented on the surface of welding wire.When copper facing is not implemented on the surface of welding wire, in order to stop the intrusion of oxygen, and, if possible then effectively has oxygen-free carburized layer at the content of the surface of welding wire regulation oxygen to this molten drop.In this carburized layer, then poor if C content is below 0.005 quality % for the distribution uniformity of this C of surface of welding wire, if it is C content surpasses 0.05 quality %, then rapid as the deterioration of the weldability of weld metal.Therefore, the C content of carburized layer is 0.005～0.05 quality %.
" O: be lower than 0.005 quality % "
The same with the action effect of C in the above-mentioned infiltration layer layer, the content of O is defined as is lower than 0.005 quality %, the surface tension of molten drop is suitably changed.Particularly the O in the carburized layer is for the capillary influence of molten drop, than decomposing CO because of welding arc
2The generation of the O that gas brings and O want big to the pairing influence of the intrusion of molten drop.If O content surpasses 0.005 quality %, then the surface tension of molten drop sharply reduces, and becomes the reason of splashing and taking place.Therefore, the O content of carburized layer is defined as and is lower than 0.005 quality %.
Secondly, in the solid core welding wire (Fe-C-Si-Mn-Ti-S-O series solder wire) of present embodiment, the composition of the welding wire inside the carburized layer that removes the surface is added reason and composition qualification reason describes.Here, the content of each element is expressed as the ratio of whole amounts of each element that the welding wire inside except that carburized layer comprised with respect to the welding wire total quality respectively.
" C:0.01～0.06 quality % "
C is the surface tension that can suitably keep molten drop, has the element that making the reduction effect of splashing.If the C content of welding wire inside is lower than 0.01 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.On the other hand, if the C content of welding wire inside surpasses 0.06 quality %, then generating capacity increases because thickization of molten drop causes splashing.In addition, also cause the intensity of wire rod to uprise, the stringiness deterioration when welding wire is made.Therefore, the C content of welding wire inside is 0.01～0.06 quality %.
" Si:0.5～1.0 quality % "
Si is the surface tension that can suitably keep molten drop, has the element that making the reduction effect of splashing.If the Si content of welding wire inside is lower than 0.5 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.On the other hand, if the Si content of welding wire inside surpasses 1.0 quality %, then generating capacity increases because thickization of molten drop causes splashing.In addition, also cause the intensity of wire rod to uprise, the stringiness deterioration when welding wire is made.Therefore, the Si content of welding wire inside is 0.5～1.0 quality %.
" Mn:1.4～2.0 quality % "
Mn is the surface tension that can suitably keep molten drop, has the element that making the reduction effect of splashing.If the Mn content of welding wire inside is lower than 1.4 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.On the other hand, if the Mn content of welding wire inside surpasses 2.0 quality %, then generating capacity increases because thickization of molten drop causes splashing.In addition, also cause the intensity of wire rod to uprise, the stringiness deterioration when welding wire is made.Therefore, the Mn content of welding wire inside is 1.4～2.0 quality %.
" Ti:0.10～0.30 quality % "
Ti is the surface tension that can suitably keep molten drop, has the element that making the reduction effect of splashing.If the Ti content of welding wire inside is lower than 0.10 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.On the other hand, if the Ti content of welding wire inside surpasses 0.30 quality %, the generating capacity that then splashes is too much, the weldability deterioration during multiple-bead deposit.Therefore, Ti content 0.10～0.30 quality % of welding wire inside.
" S:0.001～0.03 quality % "
S is the surface tension that can suitably keep molten drop, has the element that making the reduction effect of splashing.If the S content of welding wire inside is lower than 0.001 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.On the other hand, if the S content of welding wire inside surpasses 0.03 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.。Therefore, the Mn content of welding wire inside is 0.001～0.03 quality %.
" O:0.001～0.03 quality % "
O is the surface tension that can suitably keep molten drop, has the element that making the reduction effect of splashing.If the O content of welding wire inside is lower than 0.001 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.On the other hand, if the O content of welding wire inside surpasses 0.03 quality %, then the surface tension of molten drop reduces, and molten drop takes place unstable, and the generating capacity that splashes increases.。Therefore, the Mn content of welding wire inside is 0.001～0.03 quality %.
In the present embodiment, to the observation of videoing of the cross section of welding wire, also confirm homogeneity by the electron ray differential analyzer at the surperficial formed carburized layer of welding wire.
[embodiment]
Below, about the effect of embodiments of the invention, compare with the comparative example that departs from the scope of the present invention and to describe.At first; the embodiment (first embodiment) that gets as claim of the present invention; with the welding condition shown in the following table 1; use the solid core welding wire (Fe-C-Si-Mn series solder wire) of first embodiment of the present invention and the solid core welding wire of comparative example; implement gas shielded arc welding, with regard to the generating capacity evaluation of splashing separately.
[table 1]
| The welding posture | (long-pending weldering) downwards |
| Welding current | 320A |
| Weldingvoltage | 35V |
| Speed of welding | 40cpm |
| Protective gas kind, flow | 100％CO 2、20L/min |
| Polarity | DCEP (direct current antipolarity) |
Vacuum during according to Carburization Treatment is adjusted for the O content of the surperficial formed carburized layer of welding wire, in addition, adjusts for C content according to the interpolation gas flow that injects carburizer.
About C content and O content, be to deduct the C content of the wire rod before the Carburization Treatment and the amount of O content the C content of the wire rod after Carburization Treatment and the O content at the surperficial formed carburized layer of welding wire.Here said content states as defined above.
Evaluation method as the generating capacity that splashes is; with the welding condition shown in the above-mentioned table 1; use the solid core welding wire of each embodiment and comparative example to implement gas shielded arc welding after 1 minute; check the above sum that splashes of 0.5mm that is coated on the welding base metal; below 20 is ◎, more than 40 be *.Show these evaluation results in the following table 2.
[table 2]
| The composition of welding wire inside (quality %) | The composition of carburized layer (quality %) | The generating capacity evaluation result of splashing | |||||
| C | Si | Mn | | O | |||
| Embodiment | |||||||
| 1 | 0.14 | 1.1 | 2.1 | 0.097 | 0.009 | ○ | |
| 2 | 0.006 | 0.5 | 1.1 | 0.006 | 0.007 | ○ | |
| 3 | 0.08 | 0.9 | 1.5 | 0.013 | 0.006 | ○ | |
| 4 | 0.09 | 0.8 | 1.1 | 0.011 | 0.002 | ○ | |
| 5 | 0.05 | 0.7 | 1.2 | 0.082 | 0.008 | ○ | |
| 6 | 0.07 | 1.0 | 1.7 | 0.014 | 0.004 | ○ | |
| 7 | 0.08 | 0.8 | 1.8 | 0.086 | 0.009 | ○ | |
| 8 | 0.07 | 0.9 | 1.6 | 0.022 | 0.008 | ○ | |
| 9 | 0.12 | 1.1 | 1.5 | 0.027 | 0.004 | ○ | |
| Comparative example | 1 | 0.08 | 1.0 | 1.6 | 0.15 | 0.005 | × |
| 2 | 0.10 | 0.8 | 1.2 | 0.002 | 0.003 | × | |
| 3 | 0.12 | 0.9 | 1.4 | 0.08 | 0.08 | × | |
| 4 | 0.3 | 0.7 | 1.5 | 0.06 | 0.004 | × | |
The composition of embodiment 1～9 its welding wire inside and consist of suitable scope, and also be in suitable scope at the C of the surperficial formed carburized layer of welding wire and the composition of O, the generating capacity that therefore splashes reduces, and can access the welding wire with superperformance.
On the other hand, in comparative example 1, because the C content of carburized layer surpasses 0.1 quality %, so weldability is poor, can not be practical.In embodiment 2, because the C content of carburized layer is lower than 0.005 quality %, so the surface tension of molten drop reduces when welding, produce the shakiness of molten drop in addition, the generating capacity that splashes increases.In comparative example 3, because the O content of carburized layer surpasses 0.010 quality %, so the surface tension of molten drop sharply reduces in welding, the generating capacity that splashes increases in addition.In addition in comparative example 4 because the C content of welding wire inside surpasses 0.15 quality %, so when welding thickization of molten drop, the generating capacity that splashes increases.
Secondly; as second inventive embodiment of the present invention (second embodiment); with the welding condition shown in the above-mentioned table 1; use the solid core welding wire (Fe-C-Si-Mn-Ti-S-O series solder wire) of second embodiment of the present invention and the solid core welding wire of comparative example; implement gas shielded arc welding, with regard to the generating capacity evaluation of splashing separately.
Vacuum during according to Carburization Treatment is adjusted for the O content of the surperficial formed carburized layer of welding wire, in addition, adjusts for C content according to the interpolation gas flow that injects carburizer.
About C content and O content, be to deduct the C content of the wire rod before the Carburization Treatment and the amount of O content the C content of the wire rod after Carburization Treatment and the O content at the surperficial formed carburized layer of welding wire.
Evaluation method as the generating capacity that splashes is; with above-mentioned table with shown in welding condition; use the solid core welding wire of each embodiment and comparative example to implement gas shielded arc welding after 1 minute; check the above sum that splashes of 0.5mm that is coated on the welding base metal; below 20 is ◎, more than 40 be *.Show these evaluation results in the following table 3.
[table 3]
| The composition of welding wire inside (quality %) | The composition of carburized layer (quality %) | The generating capacity evaluation result of splashing | ||||||||
| C | Si | Mn | Ti | S | O | C | O | |||
| Embodiment | 10 | 0.02 | 0.6 | 1.5 | 0.11 | 0.002 | 0.002 | 0.006 | 0.003 | ◎ |
| 11 | 0.05 | 0.9 | 1.9 | 0.29 | 0.029 | 0.029 | 0.047 | 0.004 | ◎ | |
| 12 | 0.03 | 0.7 | 1.6 | 0.20 | 0.005 | 0.004 | 0.034 | 0.002 | ◎ | |
| 13 | 0.04 | 0.8 | 1.8 | 0.23 | 0.010 | 0.006 | 0.021 | 0.001 | ◎ | |
| Comparative example | 5 | 0.002 | 0.9 | 1.9 | 0.23 | 0.013 | 0.038 | 0.093 | 0.022 | × |
| 6 | 0.07 | 0.8 | 1.8 | 0.09 | 0.012 | 0.004 | 0.015 | 0.003 | × | |
| 7 | 0.06 | 1.5 | 1.6 | 0.24 | 0.015 | 0.015 | 0.018 | 0.006 | × | |
| 8 | 0.08 | 0.8 | 2.5 | 0.22 | 0.011 | 0.006 | 0.017 | 0.007 | × | |
| 9 | 0.06 | 0.9 | 1.4 | 0.21 | 0.051 | 0.005 | 0.023 | 0.001 | × | |
| 10 | 0.06 | 0.8 | 1.6 | 0.45 | 0.012 | 0.006 | 0.026 | 0.003 | × | |
| 11 | 0.06 | 0.8 | 1.5 | 0.20 | 0.026 | 0.055 | 0.098 | 0.009 | × | |
| 12 | 0.07 | 0.9 | 1.5 | 0.21 | 0.010 | 0.002 | 0.002 | 0.001 | × | |
| 13 | 0.08 | 1.0 | 1.6 | 0.22 | 0.025 | 0.016 | 0.006 | 0.026 | × | |
| 14 | 0.06 | 0.9 | 1.7 | 0.23 | 0.018 | 0.004 | 0.003 | 0.001 | × | |
| 15 | 0.06 | 0.9 | 1.8 | 0.25 | 0.021 | 0.009 | 0.009 | 0.014 | × | |
| 16 | 0.08 | 0.8 | 1.5 | 0.26 | 0.012 | 0.019 | 0.009 | 0.032 | × | |
The composition of embodiment 10～13 its welding wire inside and consist of suitable scope, and also be in suitable scope at the C of the surperficial formed carburized layer of welding wire and the composition of O, the generating capacity that therefore splashes significantly reduces, and can access the welding wire with superperformance.
On the other hand, in comparative example 5, because the C content of welding wire inside is lower than 0.005 quality %, and O content surpasses 0.03%, and the O content of carburized layer surpasses 0.010 quality % in addition, thus when welding the molten drop instability, the generating capacity that splashes increases.In embodiment 6, because the C content of welding wire inside surpasses 0.06 quality %, Ti content is lower than 0.10 quality % in addition in addition, so the generating capacity that splashes increases.In addition in comparative example 7～9 because the part that is divided into of welding wire inside surpasses the higher limit of forming, thereby when welding thickization of molten drop, the generating capacity that splashes thus also increases.In comparative example 10, because the Ti content of welding wire inside surpasses 0.30 quality %, added in addition, so the slag amount that takes place when welding is too much, weldability is poor superfluously, can not be practical.In addition in comparative example 11～15, because the part of the composition of carburized layer not in the scope of suitable composition, therefore can be encouraged the unstability of the molten drop in the welding.
According to the present invention, be adjusted to suitable scope by form C content on the surface of welding wire, the carburized layer that O content has suitably been stipulated is adjusted to suitable scope with the composition and the composition of welding wire inside, in addition even using CO
2As protective gas, and when carrying out gas shielded arc welding, also can suitably keep the surface tension of molten drop, the generating capacity that splashes is reduced with high electric current.
Claims (2)
1. solid core welding wire, it is characterized in that, has carburized layer on the surface, described carburized layer contains the C of 0.005～0.10 quality % with respect to the welding wire total quality, the O that described carburized layer contains is restricted to respect to the welding wire total quality and is lower than 0.010 quality %, C:0.005～0.150 quality %, Si:0.4～1.2 quality %, Mn:1.0～2.2 quality % are contained with respect to the welding wire total quality in welding wire inside except the described carburized layer, and surplus is Fe and unavoidable impurities.
2. solid core welding wire, it is characterized in that, has carburized layer on the surface, described carburized layer contains the C of 0.005～0.05 quality % with respect to the welding wire total quality, the O that described carburized layer contains is restricted to respect to the welding wire total quality and is lower than 0.005 quality %, welding wire inside except the described carburized layer is with respect to the welding wire total quality, contain C:0.01～0.06 quality %, Si:0.5～1.0 quality %, Mn:1.4～2.0 quality %, Ti:0.10～0.30 quality %, S:0.001～0.030 quality %, O:0.001～0.030 quality %, surplus is Fe and unavoidable impurities.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006185262 | 2006-07-05 | ||
| JP2006185262A JP4799299B2 (en) | 2006-07-05 | 2006-07-05 | Solid wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101100022A true CN101100022A (en) | 2008-01-09 |
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ID=39034556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101081631A Pending CN101100022A (en) | 2006-07-05 | 2007-05-30 | Solid welding wire |
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| Country | Link |
|---|---|
| JP (1) | JP4799299B2 (en) |
| CN (1) | CN101100022A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248324A (en) * | 2011-06-27 | 2011-11-23 | 武汉钢铁(集团)公司 | CO2 gas shield welding wire capable of reducing welding spatter |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0740081A (en) * | 1993-08-04 | 1995-02-10 | Kawasaki Steel Corp | Solid wire for gas shielded arc welding having good feedability and its production |
| JPH0747490A (en) * | 1993-08-04 | 1995-02-21 | Kawasaki Steel Corp | Manufacturing of gas shielded welding solid wire being excellent in welding workability |
-
2006
- 2006-07-05 JP JP2006185262A patent/JP4799299B2/en not_active Expired - Fee Related
-
2007
- 2007-05-30 CN CNA2007101081631A patent/CN101100022A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248324A (en) * | 2011-06-27 | 2011-11-23 | 武汉钢铁(集团)公司 | CO2 gas shield welding wire capable of reducing welding spatter |
| 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 |
|---|---|
| JP2008012557A (en) | 2008-01-24 |
| JP4799299B2 (en) | 2011-10-26 |
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