CN104999194A - Flux-cored wire for aluminized stainless steel welding - Google Patents
Flux-cored wire for aluminized stainless steel welding Download PDFInfo
- Publication number
- CN104999194A CN104999194A CN201510495819.4A CN201510495819A CN104999194A CN 104999194 A CN104999194 A CN 104999194A CN 201510495819 A CN201510495819 A CN 201510495819A CN 104999194 A CN104999194 A CN 104999194A
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- CN
- China
- Prior art keywords
- flux
- cored wire
- stainless steel
- aluminizing
- medicine core
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Classifications
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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
- B23K35/3053—Fe as the principal constituent
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a flux-cored wire for aluminized stainless steel welding. The flux-cored wire is comprises a sheath, a flux core and an aluminium layer, wherein the sheath is filled with the flux core; the aluminium layer is plated on the outer surface of the sheath; the sheath is low carbon stainless steel; the flux core comprises the following components in percentage by weight: 0.03-0.07% of graphite, 0.30-0.90% of SiO2, 1.1-1.8% of Mn, 11-14.0% of Cr, 0.15-0.50% of boron nitride, 0.05-0.35% of ferrovanadium with the vanadium-containing amount of 60%, and the balance of Fe; the flux core (made from the components) is 18-20% of the total weight of the flux core and the sheath. After the aluminized stainless steel is welded through the flux-cored wire, the tensile strength is greater than 550 MPa, and the deposited metal KV2(-30 DEG C) is greater than 100 J.
Description
Technical field
The present invention relates to metal solder welding material, the present invention relates to stainless steel welded flux-cored wire of aluminizing.
Background technology
In recent years, at cold zone, for preventing automobile exhaust system (as muffler or tailpipe) frozen, automobile exhaust system sprinkles rock salt, but can cause the high temperature corrosion of automobile exhaust system, therefore, the resistance to high temperature corrosion of automobile exhaust system becomes the problem needing to solve.For this reason, automobile exhaust system adopts stainless steel, but stainless steel also easily gives birth to red rust, and its decay resistance is also undesirable.Stainless steel of aluminizing is adopted at present in order to fully improve automobile exhaust system corrosion resistance, significantly improve service life, but, after stainless steel high temperature of aluminizing welding, weld seam high temperature corrosion is difficult to reach requirement, needs butt welded seam surface to carry out specially treated, general employing aluminium arc spraying repairing treatment, but the adaptation of the method deposited metal is not strong, and corrosion resistance is undesirable.In order to solve the problem, the present invention adopts stainless flux-cored wire of aluminizing to weld, and makes weld seam have good elevated temperature corrosion resistant.
Summary of the invention
The technical problem to be solved in the present invention is the problem solving the rear weld seam high temperature corrosion difference of corrosion resistant plate welding of aluminizing.
In order to solve the problems of the technologies described above, the invention provides one to aluminize stainless steel welded flux-cored wire, this flux-cored wire is made up of crust, the medicine core being filled in described outer intracutaneous and the aluminium lamination that is plated on described crust outer surface, wherein, described crust is low carbon stainless steel, and the percentage that the composition contained by described medicine core and each composition account for medicine core and crust gross mass is:
The percentage that described medicine core accounts for medicine core and crust gross mass is 18 ~ 20%.
Preferably, the thickness of described aluminium lamination is 0.2 ~ 0.4 μm.
Preferably, described low carbon stainless steel steel band chemical composition is: C≤0.02%, Si≤0.40%, Mn≤1.5%, S≤0.010, P≤0.010%, N≤0.01%, Cr≤20%, and surplus is iron.
Preferably, the cross-sectional diameter of described flux-cored wire is 1.2 ~ 1.4mm.
The method of the stainless steel welded flux-cored wire of aluminizing that the present invention also provides preparation above-mentioned, comprise the steps: to use steel band method to produce described flux-cored wire, O type docks, the outer intracutaneous made at low carbon stainless steel steel band fills the composition of described medicine core, through overmolding drawing, surface obtains described flux-cored wire after aluminizing.
The present invention also provides the application of above-mentioned stainless steel welded flux-cored wire of aluminizing, and welds stainless steel steel of aluminizing with described flux-cored wire, adopts 80%Ar+20%CO when welding
2gas shield.
Preferably, condition during described flux-cored wire welding is: electric current 180 ~ 210A, voltage 26 ~ 28V, speed of welding 35 ~ 40cm/min.
Stainless steel welded flux-cored wire of aluminizing provided by the invention has following beneficial effect:
1, the flux-cored wire in the present invention to aluminize stainless steel welded after, tensile strength is greater than 550MPa, and deposited metal KV2 (-30 DEG C) is greater than 100J.
2, the Hydrogen Diffusion in Deposited Metal after flux-cored wire welding of the present invention is lower than 5ml/100g.
3, the deposited metal high temperature corrosion after welding of the present invention is good, and welding technological properties is excellent, and crack resistance is excellent, is applicable to the welding that yield strength is 450MPa steel plate.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, can better understand the present invention and can be implemented, but illustrated embodiment is not as a limitation of the invention to make those skilled in the art.
Innovative design of the present invention is, adds the coarsening of the crystal grain that appropriate N element prevents Al oxide (mainly the Electroplating Aluminum part of welding wire surface) from causing, and de-slag is easy; Add appropriate Cr and improve high temperature corrosion.In lot of experiments the present invention, N and Cr adds with proper proportion, makes welding wire have good high temperature corrosion.In medicine core, add appropriate iron powder, improve its deposition efficiency.
Graphite can promote that an acicular ferrite is separated out, and controls proeutectoid ferrite body burden, thus crystal grain thinning, weld metal intensity can not only be improved, the low-temperature impact toughness of weld metal can also be improved.When content of graphite is too low, deposited metal shows as low-temperature impact toughness difference, or low-temperature impact toughness is unstable; When content of graphite is too high, not only make weld metal intensity increase, plasticity reduces, and also can in welding process, make splashing increase, therefore be limited to 0.03 ~ 0.07%.
SiO
2the main component of slag, SiO
2can regulate slag fusing point and viscosity, improve appearance of weld, make slag have good spreadability, can not embody above-mentioned feature when addition is few, when addition is too high, in weld seam, oxygen content raises, and reduces the low-temperature impact toughness of weld metal.Therefore 0.30 ~ 0.90% is limited to.
Mn is main deoxidier, reduces the oxygen content of weld metal, increases weld metal intensity and crack resistance, improves low-temperature impact toughness, regulates molten iron flow, and when addition is very few, embody above-mentioned characteristic not enough, out-of-date weld strength is too high, and low-temperature impact toughness reduces.Therefore 1.1 ~ 1.8% are limited to.
Cr is the important alloying element that this welding wire has high-temperature corrosion resistance, makes weld metal have good low-temperature flexibility, too high or too low all can not reach good obdurability coupling.In addition, Cr element can promote the solubility of N in Fe-Cr alloy, and the solubility of N increases fast along with the increase of Cr content.Determine that Cr content is 11.0% ~ 14.0%.
The coarsening of the crystal grain that boron nitride can prevent Al oxide (mainly the Electroplating Aluminum part of welding wire surface) from causing, improves the removability of slag, and too high levels is splashed and increased.Determine that content is 0.15 ~ 0.50%.
Vanadium iron can effectively suppress Cr precipitate (can reduce high temperature corrosion) to be formed, and can form complicated carbide, the yield strength can also remained valid while intensity significantly reduces, and when addition is very few, embodies above-mentioned characteristic not enough.On the other hand, content is too high is inappropriate, can cause forming large coarse block and cause the decline of toughness.Therefore, the content in the present invention is between 0.05 ~ 0.35%.
Fe and iron powder, improve deposition efficiency, improve conditions at the arc, and regulate molten iron fusing point and viscosity, surplus adds.
Feature of the present invention is: the flux-cored wire composition proportion adopted, and can play the advantage of each component to greatest extent, high temperature corrosion is good, and welding technological properties is excellent, and crack resistance is excellent.
By following concrete example, the present invention is described in further detail, but the present invention is not limited to these embodiments.
Embodiment:
The flux-cored wire of following examples of the present invention, is made up of crust, the medicine core being filled in described outer intracutaneous and the aluminium lamination that is plated on described crust outer surface.Wherein, described medicine core composition and account for medicine core and crust gross mass percentage is: graphite: 0.03 ~ 0.07%, SiO
2: 0.30 ~ 0.90%, Mn:1.1 ~ 1.8%, Cr:11 ~ 14%, boron nitride: 0.15 ~ 0.50%, vanadium iron (mass percent containing vanadium is 60%): 0.05 ~ 0.35%, surplus is Fe.
In embodiment 1 ~ 7, the preparation method of flux-cored wire: use steel band method to produce flux-cored wire, O type docks, at the outer intracutaneous filling powder (drug core component mixed) that low carbon stainless steel steel steel band is made, filling rate is 18 ~ 20% (medicine core accounts for the mass percent of medicine core and crust gross mass), through overmolding drawing, after aluminize in surface (aluminum layer thickness 0.2 ~ 0.4 μm), obtain the finished product welding wire that diameter is 1.2 ~ 1.4mm.
The application of the present embodiment flux-cored wire: adopt 80%Ar+20%CO
2protection, flux-cored wire of the present invention room temperature 20 DEG C, under the condition of relative humidity 40%; to aluminizing, stainless steel welds, during flux-cored wire monofilament weldering of the present invention, and electric current 180 ~ 210A; voltage 26 ~ 28V, speed of welding 35 ~ 40cm/min, in high temperature corrosion test, red rust incidence is zero.
The composition of embodiment 1 ~ 7 formation medicine core and mass percent thereof are in table 1.
The steel crust of flux-cored wire adopts low carbon stainless steel steel steel band, and the mass percent of its chemical composition shared by low carbon stainless steel is in table 2 (surplus is iron).
Composition contained by table 1 medicine core and account for the percentage % of medicine core and crust gross mass
Chemical composition % contained by table 2 low carbon stainless steel steel band
| Specification mm | Mn | Si | C | S | P | N | Cr |
| 1.0×14 | 0.85 | 0.30 | 0.010 | 0.010 | 0.009 | 0.006 | 18.5 |
Effect data
1, the deposited metal mechanical performance data after the flux-cored wire that prepared by embodiment 1 ~ 7 welds is in table 3
Table 3 deposited metal mechanical property
2, to the mensuration of deposited metal diffusible hydrogen content, in table 4.
Table 4 deposited metal diffusible hydrogen content
Find out from upper table, the Hydrogen Diffusion in Deposited Metal of the flux-cored wire of claim 1 ~ 7 is lower than 5ml/100g (employing mercury displacementmethod).
3, high-temperature corrosion resistance test
Inspection welding wire high temperature corrosion, stainless-steel sheet of aluminizing is of a size of 2000 × 500 × 25mm, and the one side adhesion amount of aluminium coated is 60g/m
2, be spliced into T junction, welding conditions are in table 5.Steel plate is preheating to 250 DEG C, adopts welding wire of the present invention to carry out fillet weld seam, after welding, weld seam is placed on 5min in the saline solution of 5%, then in an atmosphere with 650 DEG C of heating 2h, air cooling 5min again, 30 times so repeatedly, evaluates welding wire high temperature corrosion by red rust incidence.Red rust incidence is in table 6.
Table 5 welding conditions
| Welding current A | Weldingvoltage V | Gas flow L/min | Speed of welding cm/min |
| 200 | 28 | 18 | 38 |
Table 6 red rust incidence %
5, oblique Y cracking test
Adopt embodiment 1 ~ 7 to carry out oblique Y cracking test, after testing, face crack rate, section crack rate, root crack rate are 0% (25 DEG C × 35%RH).
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (7)
1. a stainless steel welded flux-cored wire of aluminizing, it is characterized in that, this flux-cored wire is made up of crust, the medicine core being filled in described outer intracutaneous and the aluminium lamination that is plated on described crust outer surface, wherein, described crust is low carbon stainless steel, and the percentage that the composition contained by described medicine core and each composition account for medicine core and crust gross mass is:
The percentage that described medicine core accounts for medicine core and crust gross mass is 18 ~ 20%.
2. stainless steel welded flux-cored wire of aluminizing according to claim 1, is characterized in that, the thickness of described aluminium lamination is 0.2 ~ 0.4 μm.
3. stainless steel welded flux-cored wire of aluminizing according to claim 1, is characterized in that, the chemical composition of described low carbon stainless steel steel band is: C≤0.02%, Si≤0.40%, Mn≤1.5%, S≤0.010, P≤0.010%, N≤0.01%, Cr≤20%, surplus is iron.
4. stainless steel welded flux-cored wire of aluminizing according to claim 1, is characterized in that, the cross-sectional diameter of described flux-cored wire is 1.2 ~ 1.4mm.
5. prepare the method for the stainless steel welded flux-cored wire of aluminizing described in any one of Claims 1 to 4, it is characterized in that, comprise the steps: to use steel band method to produce described flux-cored wire, O type docks, the outer intracutaneous made at low carbon stainless steel steel band fills the composition of described medicine core, through overmolding drawing, surface obtains described flux-cored wire after aluminizing.
6. the application of the stainless steel welded flux-cored wire of aluminizing described in any one of Claims 1 to 4, is characterized in that, welds stainless steel steel of aluminizing with described flux-cored wire, adopts 80%Ar+20%CO when welding
2gas shield.
7. application according to claim 6, is characterized in that, condition during described flux-cored wire welding is: electric current 180 ~ 210A, voltage 26 ~ 28V, speed of welding 35 ~ 40cm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495819.4A CN104999194B (en) | 2015-08-13 | 2015-08-13 | One kind is aluminized and stainless steel welded uses flux-cored wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495819.4A CN104999194B (en) | 2015-08-13 | 2015-08-13 | One kind is aluminized and stainless steel welded uses flux-cored wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104999194A true CN104999194A (en) | 2015-10-28 |
| CN104999194B CN104999194B (en) | 2017-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510495819.4A Active CN104999194B (en) | 2015-08-13 | 2015-08-13 | One kind is aluminized and stainless steel welded uses flux-cored wire |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035789A (en) * | 1988-08-31 | 1989-09-27 | 李书祯 | High abrasion, anti-impact surfacing welding electrode |
| US5365036A (en) * | 1992-06-22 | 1994-11-15 | The Lincoln Electric Company | Flux cored gas shielded electrode |
| CN101104232A (en) * | 2007-08-09 | 2008-01-16 | 武汉铁锚焊接材料股份有限公司 | Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding |
| CN101244496A (en) * | 2008-03-14 | 2008-08-20 | 武汉铁锚焊接材料股份有限公司 | Chromium-molybdenum-seel flux welding wire for gas shielded arc welding |
| US20110253691A1 (en) * | 2007-12-27 | 2011-10-20 | Shinji Kodama | Stainless steel flux-cored welding wire for welding of zinc-coated steel sheet and arc welding method of zinc-coated steel sheet using same |
-
2015
- 2015-08-13 CN CN201510495819.4A patent/CN104999194B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035789A (en) * | 1988-08-31 | 1989-09-27 | 李书祯 | High abrasion, anti-impact surfacing welding electrode |
| US5365036A (en) * | 1992-06-22 | 1994-11-15 | The Lincoln Electric Company | Flux cored gas shielded electrode |
| CN101104232A (en) * | 2007-08-09 | 2008-01-16 | 武汉铁锚焊接材料股份有限公司 | Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding |
| US20110253691A1 (en) * | 2007-12-27 | 2011-10-20 | Shinji Kodama | Stainless steel flux-cored welding wire for welding of zinc-coated steel sheet and arc welding method of zinc-coated steel sheet using same |
| CN101244496A (en) * | 2008-03-14 | 2008-08-20 | 武汉铁锚焊接材料股份有限公司 | Chromium-molybdenum-seel flux welding wire for gas shielded arc welding |
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|---|---|
| CN104999194B (en) | 2017-06-30 |
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