CN1820890A - Submerged-arc welding metal core weldingwire for austenite stainless steel - Google Patents
Submerged-arc welding metal core weldingwire for austenite stainless steel Download PDFInfo
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- CN1820890A CN1820890A CN 200610067165 CN200610067165A CN1820890A CN 1820890 A CN1820890 A CN 1820890A CN 200610067165 CN200610067165 CN 200610067165 CN 200610067165 A CN200610067165 A CN 200610067165A CN 1820890 A CN1820890 A CN 1820890A
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- 238000003466 welding Methods 0.000 title claims abstract description 101
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 29
- 239000010935 stainless steel Substances 0.000 title claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 23
- 239000002184 metal Substances 0.000 title claims abstract description 23
- 229910001566 austenite Inorganic materials 0.000 title claims abstract description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 10
- 239000010962 carbon steel Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 239000011651 chromium Substances 0.000 claims description 11
- 239000011572 manganese Substances 0.000 claims description 11
- 238000005275 alloying Methods 0.000 claims description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 2
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 229910018134 Al-Mg Inorganic materials 0.000 abstract description 8
- 229910018467 Al—Mg Inorganic materials 0.000 abstract description 8
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract 2
- 239000011247 coating layer Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 15
- 239000000203 mixture Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 239000002893 slag Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 6
- 229910052797 bismuth Inorganic materials 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000000137 annealing Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- 238000005554 pickling Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007778 shielded metal arc welding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 238000009491 slugging Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Nonmetallic Welding Materials (AREA)
Abstract
The present invention belongs to the field of material processing technology, relates to the welding technology of austenite stainless steel, and is especially one kind of metal core welding wire for submerged-arc welding of austenite stainless steel. The present invention features that the metal core welding wire has a coating layer of carbon steel belt and ultra low carbon steel belt; and a powder core comprising Cr 34-55 wt%, Ni 20-33 wt%, Mn 3-7 wt%, Mo 4-8 wt%, Fe 4-21 wt%, Bi2O3 0.5-1.5 wt% and Al-Mg alloy 2-10 wt%, and with filling rate of 40-58 %. The present invention has simple production process and excellent welding detachability, and is especially suitable for use in high speed automatic welding.
Description
Technical field
The invention belongs to materials processing engineering field, be mainly used in the welding of the austenitic stainless steel in fields such as oil, chemical industry, medicine, shipbuilding, food.
Background technology
The welding method of austenitic stainless steel is a lot, can adopt any method of melting welding to weld.But consider from economic, practical and technical aspect; welding method with the most use is SMAW, flux-cored arc welding and submerged-arc welding in the production, and corresponding welding materials also mainly is stainless steel electrode, stainless steel gas-shielded flux-cored wire and stainless steel used for submerged arc welding solid core welding wire.
The equipment that the stainless steel electrode arc welding is used is simple, easy to operate, flexibility and reliability, and adaptability is strong, and this is one of major reason of its extensive use.But its quality of weld joint is somewhat dependent upon welder's operative skill, and the SMAW working condition is poor, the cost height, and joint is many, is unfavorable for the raising of stainless joint performance, and production efficiency is low, thereby only is applicable to the welding of single-piece or be pilot.For short weld seam, irregular various locus and be difficult to realize that the welding point of automation, mechanization welding is the most suitable with it.In addition, the stainless steel thermal conductivity is low, and there is rubescent problem in stainless steel electrode in use afterbody, has to abandon the welding rod of residue 1/7th, has caused the waste of wlding.
Stainless steel is rapid with the flux-cored wire development in recent years, and when carrying out melting pole gas shielded arc welding, current density is big, and welding wire melting rate is fast, but deposition efficiency is used between the solid core welding wire between welding rod and gas shiled.During flux-cored wire gas shiled welding austenitic stainless steel, can adopt the mechanization welding, but owing to be subjected to the influence of gage of wire, welding current has certain restriction, burn-off rate and deposition efficiency are all not as the height of submerged-arc welding.In addition, flux-cored wire gas shiled weldering more is subject to the influence of manual operation, and welding quality is stablizing not as submerged-arc welding also.
Submerged-arc welding is because its mechanization degree height, and speed of welding is fast, and welding quality stable is one of welding method of the extensive use of present stainless steel.Producing at present and going up the widely used submerged-arc welding welding material of soldering stainless steel mainly is solid core welding wire, because the characteristic and the solder flux of its welding wire itself, ubiquity the serious problem of taking off the slag difficulty in the welding process, is commonly called as " casting skin ", as shown in Figure 1.Postwelding has to use grinder buffing, and not only labour intensity is big, and has reduced production efficiency.In addition, submerged-arc welding solid core welding wire manufacturing process complexity need be through containing alloying element more for a long time in repeatedly drawing, annealing, pickling and passivation, the especially wire rod, and the work hardening phenomenon is even more serious, and manufacture craft is more complicated.
Through domestic and international patent is retrieved, not seeing has (being correlated with) patent report.
Summary of the invention
The present invention has developed submerged-arc welding metal core weldingwire for austenite stainless steel, and the high and good advantage of flux-cored wire appearance of weld is high-efficiency welding material of new generation with the solid core welding wire deposition efficiency, can be used for the welding of austenitic stainless steel A316, A316L.
A kind of submerged-arc welding metal core weldingwire for austenite stainless steel is characterized in that, adopts carbon steel band and Ultra-low carbon steel band as clad, and the mass percent of each alloying component is in the powder core: the mass percent of chromium is 34%～55%; The mass percent of nickel is 20%～33%; The mass percent of manganese is 3%～7%; The mass percent of molybdenum is 4%～8%; The mass percent of iron is 4%～21%; The mass percent of bismuth oxide is 0.5%～1.5%; The mass percent of aluminium-magnesium alloy is 2%～10%; The filling rate of metal powder is 40%～58%.
Each alloy element component, mass percent and effect thereof are as follows in metal-cored:
Cr: to the weld seam transition alloy elements, adjust composition of weld line, improve the corrosion resistance of weld seam, its mass percent is 34%～55%.
Ni: to the weld seam transition alloy elements, adjust composition of weld line, improve the corrosion resistance of weld seam, its mass percent is 20%～33%.
Mn: transition alloy elements in weld seam, adjust composition of weld line.In addition, Mn also has deoxidation, desulfidation, and its mass percent is 3%～7%.
Mo: transition alloy elements in weld seam, adjust composition of weld line, promote ferritic formation, impel grain refinement, prevent the generation of fire check, its quality percentage composition is 4%～8%.
Fe: improve conductance, increase deposition efficiency, its mass percent is 4%～21%.
Bi
2O
3: improve the removability of slag, its mass percent is 0.5%～1.5%.
The Al-Mg alloy: main effect is deoxidation, improves the stability of electric arc, and its quality percentage composition is 2%～10%.
The metal powder filling rate is 40%～58%.The welding wire operation of rolling of the present invention is a prior art, sees Fig. 3.Earlier steel band is become U-shaped, in U-lag, add the metal powder that configures again, then U-lag is healed up, make the medicinal powder parcel wherein.
The present invention has developed the stainless steel metal core welding wire for submerged arc welding, is used for the welding of austenitic stainless steel.
The present invention compares with stainless steel electrode, is used for the submerged-arc welding of austenitic stainless steel, thereby can use bigger welding current, speed of welding faster, and do not have the rubescent problem of welding wire, thereby improved production efficiency greatly.The postwelding appearance of weld is good than stainless steel electrode also.
The present invention compares with stainless flux-cored wire, and automaticity is higher, does not have arc light in the welding process, less demanding to operating personnel, and can use bigger welding current, and speed of welding faster, welding quality is also more stable, and welding efficiency is higher.
The present invention compares with stainless steel used for submerged arc welding solid core welding wire, and the postwelding weld metal is white in color, golden yellow, has overcome solid core welding wire and has produced the problem of taking off the slag difficulty, sees Fig. 2.Postwelding need not used the clearage with grinding wheel weld seam, not only greatly reduces labour intensity, but also has improved production efficiency.The present invention compares with the solid core welding wire of same diameter, and current density is bigger, thereby can use littler welding current and speed of welding faster, and this point is highly beneficial for soldering stainless steel.The present invention is owing to added a spot of slag former in metal-cored, the removability of slag also is greatly improved than the submerged-arc welding solid core welding wire.In addition, alloying element was easy to adjust during the present invention was metal-cored, and the drawing one-shot forming need not annealing, pickling, passivation, and manufacture craft is more more simple and convenient than submerged-arc welding solid core welding wire.
The present invention adopts mild-carbon steel strip or Ultra-low carbon steel band as clad, has added the metal dust more than 97% in steel band, has only a spot of slag former, and appearance of weld relies on self surface tension adjustment, but continuous welding is specially adapted to High-Speed Automatic weldering.From its cross section, welding wire is a bridging arrangement.
Compare with the stainless steel band clad, adopt carbon steel band and Ultra-low carbon steel band as clad, not only cost is low, and does not have serious work hardening phenomenon, and the drawing one-shot forming need not annealing, pickling and passivation, and process for manufacturing welding wire is simple and convenient.Carbon steel band clad or Ultra-low carbon steel band clad specification are: width 14mm～20mm, thickness 0.5mm～0.8mm.
The employed welding current scope of welding wire is 380～600A, and the weldingvoltage scope is 30～40V, and the speed of welding scope is 450～800mm/min.
The specific embodiment
" the passive drawing formula of the FCWM50 flux-cored wire machine " that adopt Kunming Heavy Machinery Factory to produce makes metal core welding wire.The diameter of welding wire is 4mm.The operation of rolling is seen Fig. 3.Earlier steel band is become U-shaped, in U-lag, add the metal powder that configures again, then U-lag is healed up, make the medicinal powder parcel wherein.
Several slugging arcs of choosing among the present invention carry out the welding effect contrast with used for submerged arc welding solid core welding wire H00Cr19Ni12Mo2 commonly used in metal core welding wire example and the production.Mother metal adopts A316L, and its chemical composition is as shown in table 1.Submerged arc welding flux adopts HJ260, and oven dry is 400 ℃ before the weldering, is incubated 2 hours.Bevel for welding and button are chosen according to GB/T17854-199 and GB4334.5-90.The specific embodiment is as follows:
1, select the mild-carbon steel strip of 14 * 0.5 (width is 14mm, and thickness is 0.5mm) for use, filling rate is 40%, obtains the welding wire that diameter is 4mm behind drawing, tube reducing.The mass percent of each alloying element is in metal-cored: 55%Cr, 31%Ni, 3%Mn, 4%Fe, 4%Mo, 1%Bi
2O
3，2％Al-Mg。
2, select the mild-carbon steel strip of 14 * 0.5 (width is 14mm, and thickness is 0.5mm) for use, filling rate is 44%, obtains the welding wire that diameter is 4mm behind drawing, tube reducing.The mass percent of each alloying element is in metal-cored: 50%Cr, 33%Ni, 4%Mn, 4.5%Fe, 5%Mo, 0.5%Bi
2O
3, 3%Al-Mg.
3, select the mild-carbon steel strip of 16 * 0.6 (width is 16mm, and thickness is 0.6mm) for use, filling rate is 46%, obtains the welding wire that diameter is 4mm behind drawing, tube reducing.The mass percent of each alloying element is in metal-cored: 47%Cr, 30%Ni, 5%Mn, 6.5%Fe, 6%Mo, 0.5%Bi
2O
3, 5%Al-Mg.
4, select the Ultra-low carbon steel band of 18 * 0.8 (width is 18mm, and thickness is 0.8mm) for use, filling rate is 50%, obtains the welding wire that diameter is 4mm behind drawing, tube reducing.The mass percent of each alloying element is in metal-cored: 43%Cr, 27%Ni, 6%Mn, 8%Fe, 8%Mo, 1%Bi
2O
3, 7%Al-Mg.
5, select the Ultra-low carbon steel band of 20 * 0.8 (width is 20mm, and thickness is 0.8mm) for use, filling rate is 53%, obtains the welding wire that diameter is 4mm behind drawing, tube reducing.The mass percent of each alloying element is in metal-cored: 39%Cr, 20%Ni, 6%Mn, 16.5%Fe, 8%Mo, 1.5%Bi
2O
3, 9%Al-Mg.
6, select the Ultra-low carbon steel band of 20 * 0.8 (width is 20mm, and thickness is 0.8mm) for use, filling rate is 58%, obtains the welding wire that diameter is 4mm behind drawing, tube reducing.The mass percent of each alloying element is in metal-cored: 34%Cr, 21%Ni, 7%Mn, 21%Fe, 6%Mo, 1%Bi
2O
3, 10%Al-Mg.
Postwelding carries out the test of deposited metal composition, mechanical property, corrosive nature.Deposited metal composition, mechanical property are tested according to GB/T17854-1999.Deposited metal composition sees Table 2.The Mechanics Performance Testing of A316L stainless steel weld joint the results are shown in Table 3.The intercrystalline corrosion performance is tested according to GB4334.5-90.A316L stainless steel welded joint intercrystalline corrosion test result sees Table 4.From above-mentioned result of the test as can be seen, the performance of welding point meets the pertinent regulations of AWS (American National Standard), GB (CNS) fully.From soldering test, deslag after welding is good, and weld metal is white in color, golden yellow, has eliminated the problem of taking off the slag difficulty of used for submerged arc welding solid core welding wire fully.Owing to adopted mild-carbon steel strip clad and Ultra-low carbon clad, its percentage elongation is bigger than stainless steel solid core welding wire, so in the steel band drawing process, can there be the serious work hardening phenomenon that occurs in the stainless steel drawing welding wire with solid core process, thereby need not annealing, pickling, passivation, thereby its manufacture craft is more easy than stainless steel submerged-arc welding solid core welding wire manufacture craft.
The stainless chemical composition of table 1 A316
| Grade of steel | C | Si | Mn | S | P | Cr | Ni | Mo | N |
| A316L | ≤ 0.03 | ≤1.00 | ≤ 2.00 | ≤ 0.030 | ≤ 0.035 | 16.00～ 18.00 | 12.00～ 16.00 | 1.80～ 2.50 | 0.15～ 0.25 |
Table 2 deposited metal composition
| Chemical composition | |||||
| C | Mn | Si | Cr | Ni | |
| Embodiment 1 | 0.03 | 0.8 | 0.6 | 20 | 12 |
| Embodiment 2 | 0.03 | 1.2 | 0.5 | 19.8 | 13.5 |
| Embodiment 3 | 0.03 | 1.6 | 0.4 | 19.6 | 12.8 |
| Embodiment 4 | 0.03 | 2.1 | 0.5 | 20 | 13.8 |
| Embodiment 5 | 0.03 | 2.2 | 0.5 | 19 | 10 |
| Embodiment 6 | 0.03 | 2 | 0.6 | 18 | 11.3 |
The Mechanics Performance Testing of table 3 A316L stainless steel welded joint
| Welding method | Bend test | Tensile strength (MPa) | Percentage elongation δ 5，％ |
| Comparative Examples | The back of the body is curved qualified | 490 | 32 |
| Embodiment 1 | The back of the body is curved qualified | 490 | 34 |
| Embodiment 2 | The back of the body is curved qualified | 500 | 34 |
| Embodiment 3 | The back of the body is curved qualified | 495 | 33 |
| Embodiment 4 | The back of the body is curved qualified | 500 | 33 |
| Embodiment 5 | The back of the body is curved qualified | 490 | 34 |
| Embodiment 6 | The back of the body is curved qualified | 490 | 33 |
The intercrystalline corrosion of table 4 A316L stainless steel welded joint
| Comparative Examples | Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| The intercrystalline corrosion situation | Qualified | Qualified | Qualified | Qualified |
| Embodiment 4 | Embodiment 5 | Embodiment 6 | ||
| The intercrystalline corrosion situation | Qualified | Qualified | Qualified |
Claims (1)
1, a kind of submerged-arc welding metal core weldingwire for austenite stainless steel is characterized in that, adopts carbon steel band and Ultra-low carbon steel band as clad, and the mass percent of each alloying component is in the powder core: the mass percent of chromium is 34%～55%; The mass percent of nickel is 20%～33%; The mass percent of manganese is 3%～7%; The mass percent of molybdenum is 4%～8%; The mass percent of iron is 4%～21%; The mass percent of bismuth oxide is 0.5%～1.5%; The mass percent of aluminium-magnesium alloy is 2%～10%; The filling rate of metal powder is 40%～58%.
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|---|---|---|---|
| CNB2006100671656A CN100382924C (en) | 2006-04-06 | 2006-04-06 | Submerged-arc welding metal core weldingwire for austenite stainless steel |
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|---|---|---|---|
| CNB2006100671656A CN100382924C (en) | 2006-04-06 | 2006-04-06 | Submerged-arc welding metal core weldingwire for austenite stainless steel |
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| Publication Number | Publication Date |
|---|---|
| CN1820890A true CN1820890A (en) | 2006-08-23 |
| CN100382924C CN100382924C (en) | 2008-04-23 |
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| CN102267023A (en) * | 2011-07-29 | 2011-12-07 | 台州海翔焊接材料有限公司 | Metal-powder type stainless steel flux-cored wire |
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| CN102267023A (en) * | 2011-07-29 | 2011-12-07 | 台州海翔焊接材料有限公司 | Metal-powder type stainless steel flux-cored wire |
| CN102267023B (en) * | 2011-07-29 | 2013-04-24 | 台州海翔焊接材料有限公司 | Metal-powder type stainless steel flux-cored wire |
| CN103008916B (en) * | 2012-12-23 | 2014-10-15 | 北京工业大学 | Chromium oxide green 309 austenitic stainless steel metal core welding stick and preparation method thereof |
| CN103008914A (en) * | 2012-12-23 | 2013-04-03 | 北京工业大学 | Chromium oxide green 308 austenitic stainless steel metal core welding stick and preparation method thereof |
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