CN100467197C - P92 steel all position welding gas-protection flux-cored wire - Google Patents
P92 steel all position welding gas-protection flux-cored wire Download PDFInfo
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- CN100467197C CN100467197C CNB2007101211832A CN200710121183A CN100467197C CN 100467197 C CN100467197 C CN 100467197C CN B2007101211832 A CNB2007101211832 A CN B2007101211832A CN 200710121183 A CN200710121183 A CN 200710121183A CN 100467197 C CN100467197 C CN 100467197C
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Abstract
A P92 steel full-position welding gas protection flux-core welding wire belongs to the welding field of material processing. The invention is characterized in that the welding wire scarfskin adopts the 0Cr13 stainless steel strip; wherein, the mass percentage of the flux-core is chrome powder ranging from 0 to 10 percent, tungsten steel ranging from 7 percent to 11 percent, manganese ranging from 4 percent to 10 percent, molybdenum steel ranging from 2 percent to 5 percent, nickel powder ranging from 1 percent to 3 percent, vanadium iron ranging from 2 percent to 4.5 percent, columbium steel ranging from 0.2 to 0.7, manganese nitride ranging from 0.5 to 1.5, TiO2 ranging from 15 percent to 30 percent, quartz ranging from 5 percent to 15 percent, feldspar ranging from 2 percent to 10 percent, Al-Mg alloy ranging from 1 percent to 3 percent, cryolite ranging from 2 percent to 5 percent, sodium carbonate ranging from 2 percent to 5 percent, and steel powders. By adopting the flux-cored welding wire, the welding seam metal not only has high normal-temperature mechanical performance and high-temperature mechanical performance, meanwhile, the welding seam metal has good welding process performance and full-position welding adaptability.
Description
Technical field
The invention belongs to the welding field in the Materials Processing Engineering.This invention is mainly used in the be heated all-position welding of P92 steel of piping of pressure vessel, nuclear reactor and station boiler.
Background technology
The P92 steel is to add a certain amount of W elements (1.8%) on the basis of P91 steel, suitably reduce molybdenum element content (0.5%), adds the trace B element simultaneously and improved a kind of novel martensite heat resisting steel, and elevated temperature strength and croop property further improve.All select the P92 steel pipe for use in the main steam line design along with the newly-built ultra supercritical unit of present China, the widespread usage of this novel martensite refractory steel will be an inexorable trend.Development and the welding material that P92 is complementary have important practical significance to advancing the extensive use of P92 steel in China power station.
At present, the welding material of P92 steel is mainly arc welding electrode, argon tungsten-arc welding (TIG) solid core welding wire and welding SAW materials.All there is deficiency in various degree in these welding materials: manual arc electrode can not continuous welding, welding efficiency is low, waste is serious; The solid core welding wire manufacturing process complexity of TIG weldering and submerged-arc welding need be through drawing, annealing, pickling and passivation repeatedly.Flux-cored wire has advantages such as production efficiency height, welding quality is good, welding cost is low, and can be more easily by adjusting drug core component to obtain desired composition of weld line and mechanical property.
Relevant patent report is not seen in the development of P92 steel all position welding gas-shielded flux-cored wire at home, abroad as yet.
Summary of the invention
But the purpose of this invention is to provide a kind of P92 steel gas-shielded flux-cored wire of all-position welding, processing performance is good, and mechanical property reaches the requirement of AWS A5.29 technical standard and DL/T868-2004 standard.
Gas-shielded flux-cored wire provided by the present invention is characterized in that: adopting the 0Cr13 stainless steel band to add filling rate is the drug core component of 15-25%; Described drug core component mass percent is as follows:
0～10% chromium powder, 7～11% ferrotungstens, 4～10% manganese, 2～5% molybdenum-irons, 1～3% nickel powder, 2～4.5% vanadium iron, ferro-niobium 0.2～0.7%, 0.5～1.5% nitrogenized manganese, 15～30%TiO
2, 5～15% quartz, 2～10% feldspars, 1～3%Al-Mg alloy, 2～5% ice crystals, 2～5% sodium carbonate, surplus is iron powder.
Each composition effect is as follows in the medicine core:
Chromium powder: to weld metal transition alloy elements Cr.Cr is a ferrite stabilizer, improves non-oxidizability and elevated temperature strength.Along with the increase of Cr content, can limit thickization of austenite crystal.
Ferrotungsten: to weld metal transition alloy elements W.W helps improving intensity.
Manganese: to weld metal transition alloy elements Mn, deoxidation, desulfurization.Mn is an austenizer, and it is residual to suppress delta ferrite, helps improving toughness.
Molybdenum-iron: to weld metal transition alloy elements Mo.Mo is the solution strengthening element, and has the effect that improves creep rupture strength.
Nickel powder: to weld metal transition alloy elements Ni.Ni is an austenizer, has the effect that toughness reduces owing to residual delta ferrite in weld metal that prevents.
Vanadium iron: to weld metal transition alloy elements V.V is the precipitating intensified element, and having precipitating becomes carbonitride to improve the effect of creep rupture strength.
Ferro-niobium: to weld metal transition alloy elements Nb.Nb is the precipitating intensified element, and having precipitating becomes carbonitride to improve the effect of creep rupture strength.
Nitrogenized manganese: to weld metal transition elements Mn and N.N and other alloying element form carbonitride, crystal grain thinning.
TiO
2: be that slag forms component, can improve the covering performance and the weld seam removability of slag of slag.In addition, it also plays and makes electric arc concentrate, stablize, thereby reduces the effect of splashing.TiO among the present invention
2All add, wherein TiO in the natural rutile mode
2Mass percentage content〉96%.
Quartzy: as mainly to play fluxing effect, reduce the basicity of slag, adjust the physical and chemical performance of slag.
Feldspar: mainly be slag former, and can regulate the physical and chemical performance of slag, owing to contain K
2O and Na
2O helps to improve arc-stabilising.
The Al-Mg alloy: main effect is deoxidation, the Al that generates after the deoxidation
2O
3, MgO has fluxing effect.
Sodium carbonate: mainly play gas making and stable arc effect.
Ice crystal: the slag making material, the shoddye agent helps reducing diffusible hydrogen content, improves spreadability, the removability of slag and the appearance of weld of slag.
Iron powder: regulate composition and improve conductance, increase deposition efficiency.
In above-mentioned prescription, C and impurity element S, P are contained in steel band and the various powder.This welding wire clad adopts the 0Cr13 stainless steel band, and chemical composition satisfies following regulation: C≤0.08%, S≤0.02%, and P≤0.02%, Si≤0.6%, Mn≤0.8%, Cr are 12～14%.Adopt the advantage of 0Cr13 stainless steel band to be: one, 0Cr13 stainless steel band are adapted at the alloying element of the interior transition P92 steel institute of the filling rate scope claimed range of defined, and both Cr constituent contents are more approaching; Its two, compare other Cr13 stainless steel bands, the 0Cr13 stainless steel band has good plasticity, toughness and cold formability, is easy to the drawing tube reducing of welding wire.When adopting the welding of this flux-cored wire, arc stability, the particle that splashes is minimum and amount is few, and figuration of bead is attractive in appearance, and it is easy to take off slag.
Flux-cored wire of the present invention is suitable for CO
2Protection or 80%Ar+20%CO
2Protection is welding P92 steel down.Can be applicable to the be heated all-position welding of piping of pressure vessel, nuclear reactor and station boiler.
The specific embodiment
Selecting width for use is 8～12mm, and thickness is the 0Cr13 stainless steel band of 0.2～0.5mm.Earlier it is rolled into U-shaped, adds the mixed powder that granularity can be crossed 60 mesh sieve again in U-lag, filling rate (medicinal powder weight accounts for the percentage of welding wire gross weight) is 15～25%.Then U-lag is healed up, make the medicinal powder parcel wherein, waylay and rob to 1.2mm.Specific embodiments is as follows:
1. select the mild-carbon steel strip of 12 * 0.5 (width is 12mm, and thickness is 0.5mm) for use.Get ferrotungsten 11%, manganese 10%, molybdenum-iron 5%, nickel powder 3%, vanadium iron 4.5%, ferro-niobium 0.7%, nitrogenized manganese 1.5%, TiO
230%, quartz 5%, feldspar 10%, Al-Mg alloy 1%, ice crystal 5%, sodium carbonate 2%, iron powder 11.3%.Filling rate is 15%.
2. select the mild-carbon steel strip of 12 * 0.3 (width is 12mm, and thickness is 0.3mm) for use.Get ferrotungsten 10%, manganese 7.5%, molybdenum-iron 4%, nickel powder 2%, vanadium iron 3.5%, ferro-niobium 0.4%, nitrogenized manganese 1%, chromium powder 4%, TiO
220%, quartz 15%, feldspar 5%, Al-Mg alloy 2%, ice crystal 3%, sodium carbonate 4%, iron powder 18.6%.Filling rate is 18%.
3. select the mild-carbon steel strip of 8 * 0.4 (width is 8mm, and thickness is 0.4mm) for use.Get ferrotungsten 8.5%, manganese 6%, molybdenum-iron 3%, nickel powder 1.5%, vanadium iron 2.5%, ferro-niobium 0.3%, nitrogenized manganese 0.75%, chromium powder 7%, TiO
225%, quartz 8%, feldspar 8%, Al-Mg alloy 2%, ice crystal 4%, sodium carbonate 3%, iron powder 20.45%.Filling rate is 21%.
4. select the mild-carbon steel strip of 8 * 0.2 (width is 8mm, and thickness is 0.2mm) for use.Get ferrotungsten 7%, manganese 4%, molybdenum-iron 2%, nickel powder 1%, vanadium iron 2%, ferro-niobium 0.2%, nitrogenized manganese 0.5%, chromium powder 10%, TiO
215%, quartz 12%, feldspar 2%, Al-Mg alloy 3%, ice crystal 2%, sodium carbonate 5%, iron powder 34.3%.Filling rate is 25%.
The flux-cored wire of making according to above-mentioned various prescriptions carries out soldering test.Adopt the dc reverse connection method, at CO
2Weld welding current 140-180A, weldingvoltage 24-27V, speed of welding 0.5m/min, gas flow 151/min, stem elongation 20mm under the gas shield.Weld preheating 150-200 ℃, interlayer temperature is controlled at 200～250 ℃, welds in the downhand position, observe welding process, the post weld heat treatment parameter is 760 ℃ * 4 hours, Sheng cooling Su Du ≦ 150 ℃/h, and postwelding is done the detection of chemical composition and mechanical property to deposited metal.The result shows: the welding process arc stability, and it is few to splash, and appearance of weld, to take off slag good; The chemical composition of deposited metal is listed in table one; Carried out weld seam x-ray inspection, deposited metal stretching experiment and normal temperature impact experiment by GB/T10045-2001, and by GB4338-1995 deposited metal has been done 600 ℃ of following short time high temperature stretching experiments, the result lists in table two and table three respectively.By test result as can be seen, the chemical composition of flux-cored wire deposited metal of the present invention, normal temperature performance, high-temperature behavior have all reached the requirement of AWS and DLT868-2004 standard.
Table one embodiment deposited metal composition (percentage composition)
| Numbering | C | S | P | Si | Mn | Ni | Cr | Mo | W | Nb | V | N | Al |
| 1 | 0.095 | 0.012 | 0.018 | 0.06 | 0.83 | 0.57 | 9.25 | 0.55 | 1.6 | 0.06 | 0.23 | 0.06 | 0.028 |
| 2 | 0.10 | 0.01 | 0.012 | 0.10 | 0.8 | 0.48 | 9.0 | 0.5 | 1.79 | 0.045 | 0.21 | 0.05 | 0.02 |
| 3 | 0.097 | 0.01 | 0.013 | 0.10 | 0.75 | 0.4 | 8.9 | 0.46 | 1.81 | 0.04 | 0.19 | 0.04 | 0.021 |
| 4 | 0.11 | 0.009 | 0.012 | 0.14 | 0.5 | 0.4 | 8.6 | 0.39 | 1.9 | 0.035 | 0.17 | 0.04 | 0.016 |
Table two embodiment deposited metal ambient temperature mechanical properties
| Numbering | Tensile strength sigma b MPa) | Yield strength σ 0.2MPa) | Percentage elongation δ 5(％) | Impact absorbing energy (20 ℃) Akv (J) |
| 1 | 770 | 670 | 18.5 | 27 |
| 2 | 780 | 680 | 19.5 | 28.5 |
| 3 | 780 | 680 | 19.5 | 28.5 |
| 4 | 770 | 670 | 18.5 | 27 |
Table three embodiment deposited metal mechanical behavior under high temperature (600 ℃ of following high-temperature short delay stretching intensity)
| Numbering | Tensile strength sigma b (MPa) | Yield strength σ 0.2(MPa) | Percentage elongation δ 5(％) |
| 1 | 400 | 300 | 24 |
| 2 | 450 | 320 | 26 |
| 3 | 450 | 320 | 26 |
| 4 | 400 | 300 | 24 |
Claims (1)
1, a kind of P92 steel all position welding gas-shielded flux-cored wire is characterized in that: adopting the 0Cr13 stainless steel band to add filling rate is the drug core component of 15-25%; Described drug core component mass percent is as follows: 0～10% chromium powder, 7～11% ferrotungstens, 4～10% manganese, 2～5% molybdenum-irons, 1～3% nickel powder, 2～4.5% vanadium iron, ferro-niobium 0.2～0.7%, 0.5～1.5% nitrogenized manganese, 15～30%TiO
2, 5～15% quartz, 2～10% feldspars, 1～3%Al-Mg alloy, 2～5% ice crystals, 2～5% sodium carbonate, surplus is iron powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101211832A CN100467197C (en) | 2007-08-31 | 2007-08-31 | P92 steel all position welding gas-protection flux-cored wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101211832A CN100467197C (en) | 2007-08-31 | 2007-08-31 | P92 steel all position welding gas-protection flux-cored wire |
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| CN101112739A CN101112739A (en) | 2008-01-30 |
| CN100467197C true CN100467197C (en) | 2009-03-11 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704169B (en) * | 2009-11-23 | 2011-07-06 | 中国航空工业集团公司北京航空材料研究院 | Welding wire for gas shielded welding of aging martensitic stainless steel |
| CN101767256A (en) * | 2010-03-29 | 2010-07-07 | 刘西昆 | Hard-face alloy flux-cored wire material |
| CN101983827B (en) * | 2010-10-19 | 2013-07-10 | 成都新大洋焊接材料有限责任公司 | Alloy creep resistant heat resistant steel submerged arc welding stick |
| CN102161137B (en) * | 2011-04-27 | 2013-02-27 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire, preparation and application thereof |
| CN102764941B (en) * | 2012-07-03 | 2014-11-26 | 宁波隆兴焊割科技股份有限公司 | Carbon dioxide gas shielded welding flux-cored wire |
| CN102886623A (en) * | 2012-10-29 | 2013-01-23 | 海门市威菱焊材制造有限公司 | Martensite stainless steel flux-cored wire |
| JP6257193B2 (en) * | 2013-07-12 | 2018-01-10 | 株式会社神戸製鋼所 | Flux-cored wire for overlay welding |
| CN104741823B (en) * | 2015-03-09 | 2016-12-07 | 西安理工大学 | 0Cr13Ni5Mo rustless steel self-shielded welding wire and preparation method thereof |
| CN108340051A (en) * | 2017-01-22 | 2018-07-31 | 江苏大秦电气有限公司 | The assembled welding process of P92 heat resisting steel |
| CN106938375B (en) * | 2017-03-28 | 2019-03-19 | 武汉科技大学 | Gas metal-arc welding welding wire suitable for -196 DEG C of operating temperatures |
| CN107717257B (en) * | 2017-11-27 | 2020-02-14 | 四川大西洋焊接材料股份有限公司 | Flux-cored wire matched with ultra-supercritical heat-resistant steel and preparation method thereof |
| CN108436322B (en) * | 2018-06-15 | 2021-08-24 | 天津市金桥焊材集团股份有限公司 | High-strength high-toughness iron powder type flux-cored wire for bridge steel and application thereof |
| CN114951902B (en) * | 2022-04-27 | 2023-11-17 | 大连船舶重工集团有限公司 | Construction method suitable for welding seam of reactor body of nuclear power station reactor |
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