CN102500953A - High-strength low-yield-ratio gas shielded welding wire - Google Patents
High-strength low-yield-ratio gas shielded welding wire Download PDFInfo
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- CN102500953A CN102500953A CN2011104182255A CN201110418225A CN102500953A CN 102500953 A CN102500953 A CN 102500953A CN 2011104182255 A CN2011104182255 A CN 2011104182255A CN 201110418225 A CN201110418225 A CN 201110418225A CN 102500953 A CN102500953 A CN 102500953A
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Abstract
The invention discloses a high-strength low-yield-ratio gas shielded welding wire. The high-strength low-yield-ratio gas shielded welding wire comprises the following components in percentage by mass: 0.01 to 0.1 percent of C, 1.2 to 4.0 percent of Mn, 0.1 to 0.4 percent of Si, 4.0 to 8.0 percent of Ni, 1.0 to 3.5 percent of Mo, 0 to 0.04 percent of Ti, 0.1 to 0.6 percent of Cr, 0.2 to 0.4 percent of Cu, 0 to 0.1 percent of Ba, less than or equal to 0.02 percent of S, less than or equal to 0.02 percent of P and the balance of Fe. Deposited metal which is obtained after the welding wire is welded has good comprehensive performance, and is particularly high in strength and low in yield ratio, and suitable for welding and manufacturing high-strength steel for a building structure.
Description
Technical field
The present invention relates to field of welding material, specifically a kind of high strength low yield strength ratio gas shiled welding wire.
Background technology
In order to alleviate dead load, practice thrift steel, increase security reliability simultaneously, structural steels such as boats and ships, bridge, mechanical engineering, high-pressure bottle, pipeline transportation are all to the trend development of high-strength and high-ductility at present.For guaranteeing the anti-seismic performance of steel construction, guarantee that structure has enough inelastic strain abilities, steel construction must have low yield tensile ratio.It has been generally acknowledged that yield tensile ratio is more little, the distortion of materials ability is big more, and elder generation ruptured through losing efficacy after certain plastic deformation again when generation destroys, thereby delays the damage time of structure, destroys with safe pattern.Yield tensile ratio is big more, and the plastic range behind the material yield is very little, is easy to generate rupture failure more.Will certainly lose intensity but yield tensile ratio is too low, cause waste of material, yield ratio is increased, guarantee so the coupling of rational strength, toughness and plasticity is the prerequisite that improves construction(al)steel overload drag and improve intensity singlely.The yield tensile ratio of standard code construction(al)steels such as Japan JISG3136, China YB4104 and GB/T 19879 is less than 0.80.Along with the progress of metallurgical technology and the change of rolling mill practice, at present developed the commercial steel grade of high-strength and high-ductility and low yield strength ratio and be applied.
The intensity of weld metal is guaranteed easily, and the toughness that obtain to compare favourably with steel is difficult, and the high strength weld seam that obtains low yield strength ratio is then more difficult.Through knowing to the retrieval of prior art document; Publication number is the Chinese patent of CN1413795 disclosed " a Ultra-low carbon high-strength gas protecting welding wire material ": the yield strength of welding wire deposited metal is 790MPa; Tensile strength is up to 840MPa, and yield tensile ratio is 0.94.Publication number is the disclosed high strength welding wire of the Chinese patent of CN101524795A, and its deposited metal tensile strength reaches 950MPa, and yield tensile ratio has also reached 0.93.Can know that from disclosed related invention patent the deposited metal intensity that such high-strength and high-ductility welding wire obtains is high, and has toughness preferably, use to some extent but too high yield tensile ratio is difficult on the construction(al)steel it.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, a kind of high strength low yield strength ratio gas shiled welding wire is provided, can satisfy the high-intensity requirement of butt welded seam metal, lower yield tensile ratio is arranged again, satisfy the welding of building structural steel and make requirement.
Technical solution of the present invention is following:
A kind of high strength low yield strength ratio gas shiled welding wire, its characteristics are that this welding wire proportioning is by mass percentage:
C 0.01～0.1%; Mn 1.2～4.0%; Si 0.1～0.4%; Ni 4.0～8.0%; Mo 1.0～3.5%; Ti 0～0.04%; Cr 0.1～0.6%; Cu 0.2～0.4%; Ba 0～0.1%; S≤0.02%; P≤0.02%; Surplus is Fe.
To be that deoxidation is residual when being smelted by SiBaCa alloy deoxidier obtain described Ba.
The mass percent preferable range of described Ba is 0.04～0.08%.
Design of components principle of the present invention is following:
C content: C is the element that guarantees weld metal intensity, and simultaneously, C causes crisp element in the weld seam.In view of this consideration, should guarantee that the content of C is moderate in the weld seam, guarantee enough intensity through adding Mn and Mo, the C content range is 0.01%～0.1%.
Mn content: Mn is as the main alloy element in the Weld Metal in Microalloyed Steel.Mn has the effect of crystal grain thinning and solution strengthening on the other hand on the one hand as deoxidier, guarantees high-intensity acquisition, and the scope of Mn content is 1.2～4%.
Si content: Si is the main deoxidant element in the weld metal, also has certain solution strengthening effect, and the scope of Si content is 0.1～0.4%.
The adding of Ni content: Ni is for strengthening austenitic stability on the one hand, guarantees the acquisition of lower bainite tissue; On the other hand, Ni can guarantee that weld metal has good low-temperature flexibility, and the Ni content range is 4～8%.
Mo content: although with the intensity of Mn for C assurance weld metal, therefore excessive Mn infringement toughness guarantee that through Mo weld seam has enough intensity, and the scope of Mo content is 1.0～3.5%.
Ti content: Ti forms high-melting-point particle TiO and TiN in weld seam, as solidifying the forming core core, the refinement seam organization improves toughness, generally require Ti/N less than 3.42, so the Ti content range is 0～0.04%.
Cr content: Cr mainly improves quenching degree, also can improve the resistance to corrosion of weld metal simultaneously, and the Cr content range is 0.1～0.6%.
Cu content: Cu can improve the weather-resistant ability of weld metal, and the scope of Cu content is 0.2～0.4%, if this content of coppered welding wire can suitably reduce.
Ba content: Ba both can degree of depth deoxidation, again can desulfurization, and also can the accelerating oxidation field trash assemble and grow up and remove oxide inclusion, useful to plasticity and the toughness of improving weld metal.Form with the SiBaCa alloy adds in the present invention, and content range is 0～0.1%, guarantees the content of weld metal with residual mode.
Compared with prior art, the invention has the beneficial effects as follows that the deposited metal of welding wire has good comprehensive performances, very high intensity is particularly arranged, lower yield tensile ratio.Its combination property is: σ
s=794MPa, σ
b=1041MPa, σ
s/ σ
b=0.76.Be particularly suitable for the welding manufacturing of construction(al)steel, anti-stress corrosion performance when being on active service for construction(al)steel and weather-resistant performance are very useful.
The specific embodiment
Below in conjunction with embodiment the present invention is described further, present embodiment has provided detailed embodiment and concrete operating process, but should not limit protection scope of the present invention with this being to implement under the prerequisite with technical scheme of the present invention.
Embodiment 1
A kind of high strength low yield strength ratio gas shiled welding wire, the chemical composition mass percent of its welding wire welding back deposited metal is following: C:0.05%; Mn:3.54%; Si:0.14%; Ni:6.2%; Mo:2.4%; Ti:0.001%; Cr:0.40%; Cu:0.33%; Ba:0.001%; S:0.02%; P:0.015%; Surplus is Fe.
The manufacture process of present embodiment is: select ingot iron for use, proportioning Ni, Mo, Cr, Cu alloying element carry out vacuum metling according to the above ratio; All add C more successively after the fusing; Mn, Si, Ti and SiBaCa alloy wherein, reach 0.04～0.08% preferable range in order to make the Ba that obtains in the welding wire; Add suitable amount according to the content ratio of three kinds of constituent elements in the employed SiBaCa alloy and smelt, the feeding inert gas is protected and is avoided evaporating when adding Mn.Alloying element all fusing water into ingot casting after 15～30 minutes, then through forging, technologies such as rolling, dish unit and wire drawing process welding wire, gage of wire is 1.2mm, the finished product welding wire can copper facing also can not copper facing.
Welding of present embodiment welding wire deposited metal test plate (panel) and mechanical property test are carried out with steel welding wire standard according to GB 8110-87/95 carbon dioxide gas shiled weldering, and test plate (panel) is the Q235 steel, is of a size of 450mm * 150mm * 20mm; Bevel angle is 45 °, separation layer thickness＞3mm, weldingvoltage: 26～28V; Welding current: 260～290A, speed of welding: 5.0mm/s, interlayer temperature: 150/ ℃; Protective gas is the 99%Ar+1%CO2 mist, flow: 20～25L/min.The mechanical property of welding back deposited metal is seen table 1.
Embodiment 2
A kind of high strength low yield strength ratio gas shiled welding wire, the chemical composition mass percent of its welding wire welding back deposited metal is following: C:0.07%; Mn:3.47%; Si:0.10%; Ni:5.9%; Mo:2.5%; Ti:0.002%; Cr:0.43%; Cu:0.38%; Ba:0.0015%; S:0.015%; P:0.015%; Surplus is Fe.
The welding wire manufacture process of present embodiment, the welding of deposited metal test plate (panel) and mechanical property test are all with embodiment 1, and the mechanical property of welding back deposited metal is seen table 1.
Embodiment 3
A kind of high strength low yield strength ratio gas shiled welding wire does not add the Ba constituent element, smelts and becomes a process with embodiment 1.Carry out the deposited metal test plate (panel) according to GB 8110-87/95 carbon dioxide gas shiled weldering with steel welding wire standard and weld, obtain deposited metal composition after the welding and be: C:0.01%; Si:0.1%; Mn:4.0%; Mo:3.5%; Cr:0.6%; Ni:6.0%; Ti:0.025%; Cu:0.32%; S:0.020%; P:0.020%; Surplus is Fe.The mechanical property of deposited metal is seen table 1.
Embodiment 4
A kind of high strength low yield strength ratio gas shiled welding wire, the design principle according to the present invention is smelted by three kinds of constituent element content ratio interpolations of SiBaCa alloy, makes the Ba content in the welding wire reach the preferable range upper limit about 0.1%.The chemical composition mass percent of the deposited metal that obtains after the welding is: C:0.09%; Si:0.36%; Mn:1.2%; Mo:1.0%; Cr:0.1%; Ni:6.0%; Ti:0.04%; Cu:0.3%; Ba:0.008%.Smelt, become silk and the welding of deposited metal test plate (panel) with embodiment 1.The mechanical property of deposited metal is seen table 1.
Table 1 embodiment of the invention mechanical property
Claims (3)
1. high strength low yield strength ratio gas shiled welding wire is characterized in that this welding wire proportioning is by mass percentage:
C 0.01～0.1%; Mn 1.2～4.0%; Si 0.1～0.4%; Ni 4.0～8.0%; Mo 1.0～3.5%; Ti 0～0.04%; Cr 0.1～0.6%; Cu 0.2～0.4%; Ba 0～0.1%; S≤0.02%; P≤0.02%; Surplus is Fe.
2. gas shiled welding wire as claimed in claim 1 is characterized in that, to be that deoxidation is residual when being smelted by SiBaCa alloy deoxidier obtain the Ba in the welding wire.
3. according to claim 1 or claim 2 gas shiled welding wire is characterized in that the mass percent preferable range of described Ba is 0.04～0.08%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011104182255A CN102500953A (en) | 2011-12-14 | 2011-12-14 | High-strength low-yield-ratio gas shielded welding wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104182255A CN102500953A (en) | 2011-12-14 | 2011-12-14 | High-strength low-yield-ratio gas shielded welding wire |
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|---|---|
| CN102500953A true CN102500953A (en) | 2012-06-20 |
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| CN2011104182255A Pending CN102500953A (en) | 2011-12-14 | 2011-12-14 | High-strength low-yield-ratio gas shielded welding wire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104907726A (en) * | 2014-03-10 | 2015-09-16 | 株式会社神户制钢所 | Solid wire for gas metal arc welding |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058134A (en) * | 2007-06-07 | 2007-10-24 | 上海交通大学 | Gas protection wire for steel |
| CN101396774A (en) * | 2007-09-30 | 2009-04-01 | 苏派特金属（昆山）有限公司 | Flux-cored wire |
| CN101658983A (en) * | 2009-09-15 | 2010-03-03 | 武汉科技大学 | High-toughness gas protective welding wire for large-linear energy welding low-alloy steel |
-
2011
- 2011-12-14 CN CN2011104182255A patent/CN102500953A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058134A (en) * | 2007-06-07 | 2007-10-24 | 上海交通大学 | Gas protection wire for steel |
| CN101396774A (en) * | 2007-09-30 | 2009-04-01 | 苏派特金属（昆山）有限公司 | Flux-cored wire |
| CN101658983A (en) * | 2009-09-15 | 2010-03-03 | 武汉科技大学 | High-toughness gas protective welding wire for large-linear energy welding low-alloy steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104907726A (en) * | 2014-03-10 | 2015-09-16 | 株式会社神户制钢所 | Solid wire for gas metal arc welding |
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Application publication date: 20120620 |