CN105108374A - Special welding wire for automatically welding main steam pipe in nuclear power station - Google Patents
Special welding wire for automatically welding main steam pipe in nuclear power station Download PDFInfo
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- CN105108374A CN105108374A CN201510313717.6A CN201510313717A CN105108374A CN 105108374 A CN105108374 A CN 105108374A CN 201510313717 A CN201510313717 A CN 201510313717A CN 105108374 A CN105108374 A CN 105108374A
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- welding wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3026—Mn as the principal constituent
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- Arc Welding In General (AREA)
Abstract
The invention discloses a special welding wire for automatically welding a main steam pipe in a nuclear power station. The welding wire comprises the following chemical components: 0.05 to 0.1 wt% of C, 0.7 to 1.0 wt% of Si, 1 to 1.5 wt% of Mn, less than or equal to 0.02 wt% of P, less than or equal to 0.02 wt% of S, less than or equal to 0.15 wt% of Ni, 1.00 to 1.50 wt% of Cr, less than or equal to 0.15 wt% of Mo, and less than or equal to 0.4 wt% of Cu. Compared with the prior art, the chemical compositions of the deposited metal of special welding wire for automatically welding a main steam pipe in a nuclear power station are similar to those of SA335 P11 main steam pipe, the mechanical properties of the welding wire are better than or equal to a present CHW-40CNH welding wire, the anti-FAC performance of a weld joint of an SA335 P11 main steam pipe welded by the welding wire is greatly raised, the quality of the weld joint of the main steam pipe in the nuclear power station can be ensured during operation, so the weld wire is significant for safety operation of a nuclear power unit.
Description
Technical field
The present invention relates to nuclear power station main steam line automatic welding special welding material, especially a kind of special welding wire that obviously can reduce FAC corrosion rate.
Background technology
In the secondary circuit main steam carrier pipe of nuclear island of nuclear power station, medium temperature is high, flow velocity is fast, flow large (being about 1.7 ~ 1.9 times of thermoelectricity); higher and " Flow accelerated corrosion (the FAC) " phenomenon caused of flowing velocity because of delivering vapor and water can be produced; namely carbon steel pipe inner surface is under a large amount of, swiftly flowing carbonated drink are washed away; inwall has the oxide layer deterioration, thinning of defencive function, makes the phenomenon that steel matrix is deteriorated, annual corrosion rate increases.May pipe explosion accident be caused when Flow accelerated corrosion phenomenon is serious, therefore need the vapour water erosion property improving carrier pipe.
According to existing research data, in carbon steel, the corrosion rate of FAC depends on the factors such as medium temperature, flow velocity, pH value, electrode potential, tubing alloying element, thermodynamics, and wherein tubing alloying element can solve by selecting steel grades.Show after deliberation, the corrosion rate of FAC obviously can be reduced add the Cr content of particular range in carbon steel after, " in relative reduction-steel Cr% relation " result of the test shows, as Cr content > 0.04% in carbon steel, FAC speed declines rapidly: the corrosion rate of pipe material Cr content≤0.04% time is higher, and corrosion rate is substantially suitable, is assumed to 1, along with the increase of Cr content, corrosion rate reduces gradually; When Cr content reaches 0.2%, the relative velocity of corrosion is 0.2; When Cr content reaches 1%, the relative velocity of corrosion is 0.045.SA335P11 main steam line is exactly the new steel grade had compared with high resistance FAC performance developed in this context, and its chemical composition and mechanical property are as shown in table 1, table 2.
Table 1, SA335P11 steel chemical composition table/wt%
Table 2, SA335P11 steel mechanical property table
The anti-FAC purposes of SA335P11 steel, require the Cr elemental composition also in the welding material deposited metal mated with it with certain content, to make the Cr also in weld metal with certain content, the weld metal part of such pipeline also has anti-FAC ability.Due to the welding material special also do not matched with SA335P11 steel at present, the close CHW-40CNH welding wire of chemical composition, mechanical property and SA335P11 steel therefore in Construction of Nuclear Electricity, can only be selected to carry out welding of SA335P11 steel.
CHW-40CNH welding wire is a kind of weathering steel welding wire, with the addition of Ni, Cr, Cu element, for corrosive atmosphere environment in its chemical composition.Chemical composition, the mechanical property of CHW-40CNH welding wire are as shown in table 3, as can be seen from Table 3, although its composition is close with SA335P11 steel, but still have bigger difference.Also find in actual welding construction, when using CHW-40CNH welding wire welding SA335P11 steel, molten bath poor fluidity, is similar to stainless steel welding stick, requires higher to welder's operant level, is unfavorable for automatic welding technique application and improves welding quality.
Table 3, CHW-40CNH welding wire chemical composition (wt%), mechanical property table
In view of this, the necessary special welding wire providing a kind of chemical composition and mechanical property to mate completely with SA335P11 steel.
Summary of the invention
The object of the invention is to: provide a kind of chemical composition and mechanical property to weld with SA335P11 steel automatic welding the special welding wire mated completely, to ensure the demand of the engineering construction of nuclear power projects mass and follow-up operation maintenance.
In order to realize foregoing invention object, present inventor is through concentrating on studies and testing, find that a kind of chemical composition is suitable as the material of SA335P11 steel automatic welding special welding wire most, accordingly, provide a kind of nuclear power SA335P11 steel automatic welding special welding wire, it is the steel wire comprising following chemical composition: C content 0.05 ~ 0.1wt%, Si content 0.7 ~ 1.0wt%, Mn content 1 ~ 1.5wt%, P content≤0.02wt%, S content≤0.02wt%, Ni content≤0.15wt%, Cr content 1.00 ~ 1.50wt%, Mo content≤0.15wt%, Cu content≤0.4wt%.
One as nuclear power main steam automatic welding of pipelines special welding wire of the present invention is improved, and the deposited metal of described welding wire comprises following chemical composition: C content 0.05wt%, Si content 0.82wt%, Mn content 1.26wt%, P content 0.013wt%, S content 0.006wt%, Ni content 0.018wt%, Cr content 1.29wt%, Mo content 0.011wt%, Cu content 0.188wt%.
One as nuclear power main steam automatic welding of pipelines automatic welding special welding wire of the present invention is improved, and the specification of described welding wire is Φ 0.8mm.
One as nuclear power main steam automatic welding of pipelines special welding wire of the present invention is improved, and the deposited metal of described welding wire comprises following chemical composition: C content 0.03wt%, Si content 0.90wt%, Mn content 1.19wt%, P content 0.013wt%, S content 0.006wt%, Ni content 0.016wt%, Cr content 1.32wt%, Mo content 0.011wt%, Cu content 0.242wt%.
One as nuclear power main steam automatic welding of pipelines special welding wire of the present invention is improved, and the specification of described welding wire is Φ 1.0mm.
Compared with prior art, the chemical composition of nuclear power main steam automatic welding of pipelines special welding wire deposited metal of the present invention and SA335P11 main steam line are relatively, mechanical property is also better than existing CHW-40CNH welding wire or suitable with existing CHW-40CNH welding wire, therefore its anti-FAC performance completing main steam line weld seam is used to be significantly increased, ensure that the quality of nuclear power station main steam line weld seam in operation process, significant to the safe operation of nuclear power generating sets.Visible, nuclear power main steam pipeline automatic welding special welding wire of the present invention efficiently solves the welding material problem do not matched with SA335P11 main steam line at present.
Detailed description of the invention
In order to make goal of the invention of the present invention, technical scheme and Advantageous Effects thereof more clear, below in conjunction with detailed description of the invention, the present invention is further elaborated.Should be understood that, the detailed description of the invention described in this description is only used to explain the present invention, is not intended to limit the present invention.
In order to coordinate with SA335P11 main steam line steel, inventor is through many experiments, the chemical composition of nuclear power SA335P11 main steam line steel automatic welding special welding wire of the present invention, the chemical composition of welding wire deposited metal and mechanical property design load are drawn, as shown in Table 4-6.
Table 4, nuclear power station main steam line automatic welding special welding wire Design of Chemical Composition value/wt%
Table 5, nuclear power station main steam line automatic welding special welding wire deposited metal composition design load/wt%
Table 6, nuclear power station main steam line automatic welding special welding wire deposited metal mechanical property design load
When producing smelting, because of the limited field relative narrower of silicone content in nuclear power station main steam line automatic welding special welding wire of the present invention, so, the smelting of steel ingot acquires a certain degree of difficulty, afterwards by selecting high quality silicon iron material, then adding the ferrosilicon of proper content, reaching the object increasing alloy.
For copper-plating technique, because nuclear power main steam pipeline automatic welding special welding wire of the present invention is containing Cr element, poor with common electroless copper replacement result, welding wire surface copper facing is bad, uneven, by test, uses electroplating technology instead and reaches ideal effect.
After tested, according to according to the present invention design produce two kinds of nuclear power main steam pipeline automatic welding special welding wire deposited metal compositions and mechanical property as table 7-8 shown in.
Table 7, each embodiment welding wire deposited metal composition test result/wt%
| Embodiment | C | Si | Mn | P | S | Ni | Cr | Mo | Cu |
| Φ0.8mm | 0.05 | 0.82 | 1.26 | 0.013 | 0.006 | 0.018 | 1.29 | 0.011 | 0.188 |
| Φ1.0mm | 0.03 | 0.90 | 1.19 | 0.013 | 0.006 | 0.016 | 1.32 | 0.011 | 0.242 |
Table 8, each embodiment welding wire deposited metal mechanical experimental results
Compared with prior art, the chemical composition of nuclear power station main steam line automatic welding special welding wire deposited metal of the present invention and SA335P11 steel are relatively, mechanical property is also better than existing CHW-40CNH welding wire or suitable with existing CHW-40CNH welding wire, the anti-FAC performance of the SA335P11 main steam line weld seam therefore using it to complete is significantly increased, ensure that the quality of nuclear power station main steam line weld seam in operation process, significant to the safe operation of nuclear power generating sets.Visible, nuclear power main steam pipeline automatic welding special welding wire of the present invention efficiently solves the welding material problem do not matched with SA335P11 steel at present.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also carry out suitable change and amendment to above-mentioned embodiment.Therefore, the present invention is not limited to detailed description of the invention disclosed and described above, also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this description, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (5)
1. a nuclear power station main steam line automatic welding special welding wire, is characterized in that: described welding wire comprises following chemical composition: C content 0.05 ~ 0.1wt%, Si content 0.7 ~ 1.0wt%, Mn content 1 ~ 1.5wt%, P content≤0.02wt%, S content≤0.02wt%, Ni content≤0.15wt%, Cr content 1.00 ~ 1.50wt%, Mo content≤0.15wt%, Cu content≤0.4wt%.
2. nuclear power station main steam line automatic welding special welding wire according to claim 1, is characterized in that: the deposited metal of described welding wire comprises following chemical composition: C content 0.05wt%, Si content 0.82wt%, Mn content 1.26wt%, P content 0.013wt%, S content 0.006wt%, Ni content 0.018wt%, Cr content 1.29wt%, Mo content 0.011wt%, Cu content 0.188wt%.
3. nuclear power station main steam line automatic welding special welding wire according to claim 2, is characterized in that: the specification of described welding wire is Φ 0.8mm.
4. nuclear power station main steam line automatic welding special welding wire according to claim 1, is characterized in that: the deposited metal of described welding wire comprises following chemical composition: C content 0.03wt%, Si content 0.90wt%, Mn content 1.19wt%, P content 0.013wt%, S content 0.006wt%, Ni content 0.016wt%, Cr content 1.32wt%, Mo content 0.011wt%, Cu content 0.242wt%.
5. nuclear power station main steam line automatic welding special welding wire according to claim 4, is characterized in that: the specification of described welding wire is Φ 1.0mm.
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| CN201510313717.6A CN105108374B (en) | 2015-06-09 | 2015-06-09 | Nuclear power station main steam line automatic welding special welding wire |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271205A (en) * | 2016-08-31 | 2017-01-04 | 北京国电富通科技发展有限责任公司 | A kind of alloy welding wire |
| CN109719418A (en) * | 2018-12-31 | 2019-05-07 | 苏州新普新材料科技有限公司 | Nuclear power 20 controls chromium steel special welding wire |
Citations (5)
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| US4273838A (en) * | 1976-03-08 | 1981-06-16 | Combustion Engineering, Inc. | Weld metal resistant to neutron-bombardment embrittlement |
| JP2002336989A (en) * | 2001-05-16 | 2002-11-26 | Sumikin Welding Ind Ltd | Welding material for seashore weather resistant steel |
| CN101664863A (en) * | 2009-09-24 | 2010-03-10 | 湖北猴王焊材有限公司 | Seawater corrosion resistant submerged arc welding wire |
| CN101670477A (en) * | 2009-09-17 | 2010-03-17 | 胜利油田孚瑞特石油装备有限责任公司 | Welding method of sulfureted hydrogen resistant underground heat-insulated oil pipe |
| 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 |
-
2015
- 2015-06-09 CN CN201510313717.6A patent/CN105108374B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273838A (en) * | 1976-03-08 | 1981-06-16 | Combustion Engineering, Inc. | Weld metal resistant to neutron-bombardment embrittlement |
| JP2002336989A (en) * | 2001-05-16 | 2002-11-26 | Sumikin Welding Ind Ltd | Welding material for seashore weather resistant steel |
| CN101670477A (en) * | 2009-09-17 | 2010-03-17 | 胜利油田孚瑞特石油装备有限责任公司 | Welding method of sulfureted hydrogen resistant underground heat-insulated oil pipe |
| CN101664863A (en) * | 2009-09-24 | 2010-03-10 | 湖北猴王焊材有限公司 | Seawater corrosion resistant submerged arc welding wire |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271205A (en) * | 2016-08-31 | 2017-01-04 | 北京国电富通科技发展有限责任公司 | A kind of alloy welding wire |
| CN109719418A (en) * | 2018-12-31 | 2019-05-07 | 苏州新普新材料科技有限公司 | Nuclear power 20 controls chromium steel special welding wire |
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