CN112372175B - Self-protection flux-cored wire for rutile type austenitic stainless steel - Google Patents
Self-protection flux-cored wire for rutile type austenitic stainless steel Download PDFInfo
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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
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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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
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Abstract
The application discloses rutile type austenitic stainless steel self-protection flux-cored wire belongs to the technical field of welding materials, and the main points of the technical scheme are that the wire comprises a 304L stainless steel belt sheath and a flux core, wherein the flux core is prepared by mixing the following components in percentage by weight, rutile 22-28%, potash feldspar 3-5%, quartz 2-5%, bismuth oxide 0.1-0.5%, sodium fluosilicate 1.0-2.5%, cryolite 1.0-2.5%, potassium titanate 2-5%, iron sand 1.5-3%, manganese powder 4-7%, chromium powder 20-25%, nickel powder 10-15%, ferrotitanium 2-4%, aluminum-magnesium alloy 0.5-3%, aluminum-iron alloy 0.5-3%, silicon-zirconium alloy 2-4%, and the balance of iron powder.
Description
Technical Field
The application relates to the field of welding materials, in particular to a rutile type austenitic stainless steel self-protection flux-cored wire.
Background
The austenitic stainless steel has good corrosion resistance, oxidation resistance and comprehensive mechanical properties, and is widely applied to the fields of petrifaction, pressure vessels, pharmacy and the like; the self-protection flux-cored wire is a novel welding material which is rapidly developed in recent years, no additional protective gas is needed during welding, the welding gun is simple in structure and convenient to operate, and the advantages of strong environmental adaptability and the like are deeply favored by various working conditions. The austenitic stainless steel self-protection flux-cored wire has the characteristics of both austenitic stainless steel and self-protection welding wire, has great market prospect, but the welding material has two obvious insufficient places in the welding production process at present: 1. air holes are formed during multilayer welding; 2. the welding process has poor performance, which is mainly reflected in the aspects of large splashing, poor slag detachability, incapability of welding at all positions and the like.
Disclosure of Invention
Aiming at the problems of air holes and poor welding process performance in multilayer welding in the prior art, the self-protection flux-cored wire for the rutile austenitic stainless steel has the advantages of no air holes and good welding process performance in welding.
The application provides a rutile type austenitic stainless steel self-protection flux-cored wire adopts following technical scheme:
a rutile type austenitic stainless steel self-protection flux-cored welding wire comprises a 304L stainless steel belt sheath and a flux core, wherein the flux core is prepared by mixing 22-28% of rutile, 3-5% of potash feldspar, 2-5% of quartz, 0.1-0.5% of bismuth oxide, 1.0-2.5% of sodium fluosilicate, 1.0-2.5% of cryolite, 2-5% of potassium titanate, 1.5-3% of iron sand, 4-7% of manganese powder, 20-25% of chromium powder, 10-15% of nickel powder, 2-4% of ferrotitanium, 0.5-3% of aluminum-magnesium alloy, 0.5-3% of aluminum-iron alloy, 2-4% of silicon-zirconium alloy and the balance of iron powder.
Preferably, the flux core is prepared by mixing 23-27 wt% of rutile, 3.5-4.5 wt% of potassium feldspar, 2.5-4 wt% of quartz, 0.2-0.4 wt% of bismuth oxide, 1.5-2.5 wt% of sodium fluosilicate, 1.5-2.5 wt% of cryolite, 2-5 wt% of potassium titanate, 1.5-3 wt% of iron sand, 4.5-7 wt% of manganese powder, 21-25 wt% of chromium powder, 10-14 wt% of nickel powder, 2.5-4 wt% of ferrotitanium, 1.0-3 wt% of aluminum-iron alloy, 1.0-3 wt% of silicon-zirconium alloy and the balance of iron powder.
By adopting the technical scheme, because of the characteristic of the self-protection welding wire, more deoxidizing and denitrifying agents such as ferrotitanium, aluminum-magnesium alloy, aluminum-iron alloy, silicon-zirconium alloy and the like need to be added, the deoxidizing agent enables deposited metal to keep proper redox potential, the denitrifying agent reduces the nitrogen content of the welding seam, but the deoxidizing and denitrifying product has higher melting point, slag inclusion is easily caused, and endogenous gas in the welding seam is prevented from escaping, so that the welding seam has air holes. This application makes the various physicochemical properties of slag keep at appropriate level through adjustment medicine core composition and ratio, can float in liquid metal in good time, guarantees not having the sediment of pressing from both sides, blocks the outside air simultaneously, thereby protects the welding bead, realizes pore-free together with the deoxidation and denitrogenation agent, and welding completion back is automatic to drop, and the production of various welding defects is stopped to non-stick sediment.
In addition, the flux-cored wire obtained by the method can be used for welding in all directions, and is stable in electric arc and less in splashing in the construction process.
Preferably, the titanium in the ferrotitanium accounts for 25-35 wt%, the aluminum in the aluminum-magnesium alloy accounts for 50-55 wt%, the aluminum in the ferroaluminum alloy accounts for 50-55 wt%, and the silicon in the silicon-zirconium alloy accounts for 47-52 wt%.
Preferably, the total fluoride content is more than or equal to 3 percent.
Preferably, the total weight of the ferrotitanium, the aluminum-magnesium alloy, the aluminum-iron alloy and the silicon-zirconium alloy is more than or equal to 6.5 percent.
By adopting the technical scheme, when the content sum of the components of the flux cores in the ferrotitanium, the aluminum-magnesium alloy, the ferroaluminum alloy and the silicon-zirconium alloy is more than or equal to 6.5 percent, the nitrogen and oxygen in deposited metal can be effectively removed in the welding process, so that no air holes are generated in the final welding layer, and the strength of the welding layer is also effectively ensured.
Preferably, the filling rate of the flux-cored wire is 23-26%.
Preferably, the diameter of the flux-cored wire is 1.2 or 1.6 mm.
Preferably, the deposited metal components of the flux-cored wire comprise, by mass, 0.014-0.031% of C, 0.397-0.489% of Si, 1.34-1.71% of Mn, 19.58-21.85% of Cr, 9.45-11.92% of Ni, 0.0013-0.0082% of S, 0.017-0.022% of P, and the balance Fe.
In summary, the present application has the following beneficial effects:
1. the welding wire has the excellent process performances of small splashing, good weld joint forming, excellent slag removal, capability of all-position welding and the like; meanwhile, the air can be effectively isolated, and the influence of each component in the atmosphere on deposited metal can be reduced to the maximum extent;
2. according to the method, the proportion of each mineral is adjusted, so that various physical and chemical properties of the slag are kept in a reasonable range, a welded deposited metal layer is free from air holes, and the deposited metal layer can be guaranteed to have good mechanical properties;
3. the silicon-zirconium alloy is added as a denitrifier, so that the nitrogen content of a weld joint can be reduced, no air holes are formed together with slag, and the welding quality is ensured;
4. the selection of the type and the amount of the fluoride effectively ensures the process performance after welding, is environment-friendly, and avoids the defects of increased slag content and increased splashing in deposited metal when the amount of the fluoride is too much;
5. the sheath is made of a 304L stainless steel strip, the ductility of the welding wire is good, the welding wire can be drawn to the diameter of 1.2 or 1.6mm, and technical guarantee is provided for welding.
Detailed Description
The present application will be described in further detail with reference to examples.
The preparation method of the flux-cored wire in the following examples and comparative examples is as follows: cleaning a 304L stainless steel strip, rolling the cleaned stainless steel strip into a U-shaped groove, filling the mixed flux core into the U-shaped groove, rolling and closing the U-shaped groove by using a forming machine to form a primary welding wire, and drawing the primary welding wire into welding wires with the diameters of 1.2mm or 1.6mm respectively.
Example 1
A rutile type austenitic stainless steel self-protection flux-cored wire comprises a 304L stainless steel belt sheath and a flux core, the filling rate of the prepared flux-cored wire is 22.5%, and the flux core is prepared by mixing 22kg of rutile, 3kg of potassium feldspar, 4kg of quartz, 0.3kg of bismuth oxide, 2kg of sodium fluosilicate, 1kg of cryolite, 5kg of potassium titanate, 2kg of iron sand, 4kg of manganese powder, 20kg of chromium powder, 10kg of nickel powder, 2kg of ferrotitanium, 2kg of aluminum-magnesium alloy, 1kg of aluminum-iron alloy, 4kg of silicon-zirconium alloy and 17.7kg of iron powder;
wherein the weight percentage of titanium in the ferrotitanium is 30 percent; the weight percentage of the iron is 70 percent;
the aluminum-magnesium alloy contains 50 wt% of aluminum and 50 wt% of magnesium;
the aluminum content in the aluminum-iron alloy is 55 weight percent, and the iron content in the aluminum-iron alloy is 45 weight percent;
the weight percentage of silicon in the silicon-zirconium alloy is 47 percent, and the weight percentage of zirconium is 53 percent;
the deposited metal during welding comprises, by mass, 0.031% of C, 0.431% of Si, 1.62% of Mn, 19.58% of Cr, 9.45% of Ni, 0.0057% of S, 0.019% of P, and the balance of Fe.
Example 2
24kg of rutile, 3.5kg of potash feldspar, 3.5kg of quartz, 0.4kg of bismuth oxide, 2.5kg of sodium fluosilicate, 1kg of cryolite, 4.5kg of potassium titanate, 2.5kg of iron sand, 4.5kg of manganese powder, 21kg of chromium powder, 11kg of nickel powder, 3kg of ferrotitanium, 1kg of aluminum-magnesium alloy, 3kg of aluminum-iron alloy, 3kg of silicon-zirconium alloy and 11.6kg of iron powder;
wherein the weight percentage of titanium in the ferrotitanium is 25 percent; the weight percentage of the iron is 75 percent;
the aluminum-magnesium alloy contains 50 wt% of aluminum and 50 wt% of magnesium;
the aluminum content in the aluminum-iron alloy is 55 weight percent, and the iron content in the aluminum-iron alloy is 45 weight percent;
the weight percentage of silicon in the silicon-zirconium alloy is 47 percent, and the weight percentage of zirconium is 53 percent;
the deposited metal during welding comprises, by mass, 0.016% of C, 0.397% of Si, 1.64% of Mn, 19.93% of Cr, 9.71% of Ni, 0.0043% of S, 0.019% of P, and the balance of Fe.
Example 3
23kg of rutile, 4.5kg of potash feldspar, 4kg of quartz, 0.5kg of bismuth oxide, 1kg of sodium fluosilicate, 2kg of cryolite, 2.5kg of potassium titanate, 3kg of iron sand, 7kg of manganese powder, 22kg of chromium powder, 12kg of nickel powder, 3kg of ferrotitanium, 3kg of aluminum magnesium alloy, 1.5kg of aluminum iron alloy, 2kg of silicon zirconium alloy and 9kg of iron powder;
wherein the weight percentage of titanium in the ferrotitanium is 35 percent; the weight percentage content of iron is 65 percent;
the aluminum-magnesium alloy contains 52 weight percent of aluminum and 48 weight percent of magnesium;
the aluminum content in the aluminum-iron alloy is 55 weight percent, and the iron content in the aluminum-iron alloy is 45 weight percent;
the silicon zirconium alloy contains 50% of silicon and 50% of zirconium by weight;
the deposited metal during welding comprises, by mass, 0.028% of C, 0.432% of Si, 1.34% of Mn, 20.54% of Cr, 10.44% of Ni, 0.0013% of S, 0.016% of P, and the balance of Fe.
Example 4
A rutile type austenitic stainless steel self-protection flux-cored wire comprises a 304L stainless steel belt sheath and a flux core, wherein the filling rate of the obtained flux-cored wire is 24.5%, and the flux core is prepared by mixing 28kg of rutile, 5kg of potash feldspar, 2kg of quartz, 0.2kg of bismuth oxide, 1kg of sodium fluosilicate, 2.5kg of cryolite, 2kg of potassium titanate, 1.5kg of iron sand, 5kg of manganese powder, 25kg of chromium powder, 14kg of nickel powder, 4kg of ferrotitanium, 0.5kg of aluminum magnesium alloy, 0.5kg of aluminum iron alloy, 2.5kg of silicon zirconium alloy and 6.3kg of iron powder according to weight percentage;
wherein the weight percentage of titanium in the ferrotitanium is 35 percent; the weight percentage content of iron is 65 percent;
the aluminum-magnesium alloy contains 55 weight percent of aluminum and 45 weight percent of magnesium;
the aluminum content in the aluminum-iron alloy is 50% by weight, and the iron content in the aluminum-iron alloy is 50% by weight;
the silicon-zirconium alloy contains 52 weight percent of silicon and 48 weight percent of zirconium;
the deposited metal during welding contains, by mass, 0.014% of C, 0.487% of Si, 1.71% of Mn, 21.85% of Cr, 11.92% of Ni, 0.0082% of S, 0.017% of P, and the balance Fe.
Example 5
A rutile type austenitic stainless steel self-protection flux-cored wire comprises a 304L stainless steel belt sheath and a flux core, wherein the filling rate of the obtained flux-cored wire is 25%, and the flux core is prepared by mixing 25kg of rutile, 4kg of potash feldspar, 2.5kg of quartz, 0.1kg of bismuth oxide, 1.5kg of sodium fluosilicate, 2kg of cryolite, 3kg of potassium titanate, 2.5kg of iron sand, 5.5kg of manganese powder, 23kg of chromium powder, 12kg of nickel powder, 2.5kg of ferrotitanium, 1kg of aluminum-magnesium alloy, 1.5kg of aluminum-iron alloy, 3kg of silicon-zirconium alloy and 10.9kg of iron powder;
wherein the weight percentage of titanium in the ferrotitanium is 32 percent; the weight percentage content of the iron is 68 percent;
the aluminum-magnesium alloy contains 55 weight percent of aluminum and 45 weight percent of magnesium;
the aluminum content in the aluminum-iron alloy is 50% by weight, and the iron content in the aluminum-iron alloy is 50% by weight;
the silicon-zirconium alloy contains 52 weight percent of silicon and 48 weight percent of zirconium;
the deposited metal during welding contains, in mass%, 0.014% of C, 0.438% of Si, 1.56% of Mn, 21.49% of Cr, 11.24% of Ni, 0.0045% of S, 0.025% of P, and the balance of Fe.
Example 6
A rutile type austenitic stainless steel self-protection flux-cored wire comprises a 304L stainless steel belt sheath and a flux core, wherein the filling rate of the obtained flux-cored wire is 26%, and the flux core is prepared by mixing 27kg of rutile, 3.5kg of potash feldspar, 5kg of quartz, 0.2kg of bismuth oxide, 2kg of sodium fluosilicate, 1.5kg of cryolite, 3.5kg of potassium titanate, 3kg of iron sand, 6kg of manganese powder, 22kg of chromium powder, 15kg of nickel powder, 2.5kg of ferrotitanium, 0.5kg of aluminum magnesium alloy, 2kg of aluminum iron alloy, 2.5kg of silicon zirconium alloy and 3.8kg of iron powder according to weight percentage;
wherein the weight percentage of titanium in the ferrotitanium is 27 percent; the weight percentage content of iron is 73%;
the aluminum-magnesium alloy contains 55 weight percent of aluminum and 45 weight percent of magnesium;
the aluminum content in the aluminum-iron alloy is 50% by weight, and the iron content in the aluminum-iron alloy is 50% by weight;
the silicon-zirconium alloy contains 52 weight percent of silicon and 48 weight percent of zirconium;
the deposited metal during welding contains, in mass%, 0.015% of C, 0.489% of Si, 1.57% of Mn, 20.67% of Cr, 11.76% of Ni, 0.0065% of S, 0.022% of P, and the balance of Fe.
Comparative example 1
The flux core is calculated by weight percentage, 20kg of rutile, 6% kg of potassium feldspar, 1kg of quartz, 0.6kg of bismuth oxide, 0.5kg of sodium fluosilicate, 3kg of cryolite, 1.5kg of potassium titanate, 1kg of iron sand, 7.5kg of manganese powder, 26kg of chromium powder, 9kg of nickel powder, 5kg of ferrotitanium (the titanium content is 30 weight percent), 0.4kg of aluminum-magnesium alloy (the aluminum content is 55 weight percent), 3.5kg of aluminum-iron alloy (the aluminum content is 50 weight percent), 1.5kg of silicon-zirconium alloy (the silicon content is 52 weight percent) and 13.5kg of iron powder;
the deposited metal during welding comprises, by mass, 0.016% of C, 0.487% of Si, 1.72% of Mn, 22.05% of Cr, 9.20% of Ni, 0.0082% of S, 0.017% of P, and the balance Fe.
Comparative example 2
The flux core is calculated according to the weight percentage, 28.5kg of rutile, 2kg of potash feldspar, 5.5kg of quartz, 0.05kg of bismuth oxide, 3kg of sodium fluosilicate, 0.5kg of cryolite, 5.5kg of potassium titanate, 3.5kg of iron sand, 3.5kg of manganese powder, 19kg of chromium powder, 15.5kg of nickel powder, 2.5kg of ferrotitanium (the titanium content is 30 weight percent), 3.5kg of aluminum-magnesium alloy (the aluminum content is 55 weight percent), 0.1kg of aluminum-iron alloy (the aluminum content is 50 weight percent), 4.5kg of silicon-zirconium alloy (the silicon content is 52 weight percent) and 2.85kg of iron powder;
the deposited metal during welding contains, in mass%, 0.015% of C, 0.452% of Si, 1.65% of Mn, 19.87% of Cr, 10.62% of Ni, 0.0051% of S, 0.018% of P, and the balance of Fe.
Comparative example 3
The difference from the embodiment 1 is that the flux core is prepared by mixing 22kg of rutile, 3kg of potash feldspar, 4kg of quartz, 0.3kg of bismuth oxide, 2kg of sodium fluosilicate, 1kg of cryolite, 5kg of potassium titanate, 2kg of iron sand, 4kg of manganese powder, 20kg of chromium powder, 10kg of nickel powder, 1kg of aluminum-iron alloy, 4kg of silicon-zirconium alloy and 21.7kg of iron powder;
the deposited metal during welding contains, in mass%, C0.028%, Si 0.411%, Mn 1.60%, Cr 19.56%, Ni 9.47%, S0.0054%, P0.018%, and the balance being Fe.
Comparative example 4
The difference from the embodiment 1 is that the flux core is prepared by mixing 22kg of rutile, 3kg of potassium feldspar, 4kg of quartz, 0.3kg of bismuth oxide, 2kg of sodium fluoride, 1kg of lithium fluoride, 5kg of potassium titanate, 2kg of iron sand, 4kg of manganese powder, 20kg of chromium powder, 10kg of nickel powder, 2kg of ferrotitanium, 2kg of aluminum-magnesium alloy, 1kg of aluminum-iron alloy, 4kg of silicon-zirconium alloy and 17.7kg of iron powder;
the deposited metal during welding comprises, by mass, 0.027% of C, 0.442% of Si, 1.64% of Mn, 19.97% of Cr, 9.87% of Ni, 0.0061% of S, 0.018% of P, and the balance of Fe.
Comparative example 5
The difference from the embodiment 1 is that the flux core is prepared by mixing 22kg of rutile, 4kg of quartz, 0.3kg of bismuth oxide, 2kg of sodium fluoride, 1kg of lithium fluoride, 5kg of potassium titanate, 4kg of manganese powder, 20kg of chromium powder, 10kg of nickel powder, 2kg of ferrotitanium, 2kg of aluminum-magnesium alloy, 1kg of aluminum-iron alloy, 4kg of silicon-zirconium alloy and 22.7kg of iron powder;
the deposited metal during welding comprises, by mass, 0.031% of C, 0.431% of Si, 1.62% of Mn, 19.58% of Cr, 9.45% of Ni, 0.0057% of S, 0.019% of P, and the balance of Fe.
Performance detection
The self-shielded flux-cored wires obtained in examples 1 to 6 and comparative examples 1 to 5 were subjected to an arc welding test, in which the welding process parameters were: when the diameter of the welding wire is 1.2mm, the welding current is 120-220A, the arc voltage is 26-31V, and the dry elongation is 20-25 mm;
when the diameter of the welding wire is 1.6mm, the welding current is 180-280A, the arc voltage is 28-33, and the dry elongation is 20-25 mm;
and (2) detecting the mechanical properties of the deposited metal, wherein the tensile strength, the yield strength and the elongation are tested according to the national standard GB/T2652-2008 & ltweld joint and deposited metal tensile test method & gt, the impact power is tested according to the national standard GB/T2650 & lt2008 & gt impact test method & gt for welded joints, and the detection results are shown in Table 1.
Table 1 table of the test results of the welding wire welded deposit metal performance
| Item | Tensile strength/MPa | Yield strength/MPa | Elongation/percent | Impact work at-20 ℃ J |
| Example 1 | 580 | 522 | 41 | 37 |
| Example 2 | 560 | 485 | 46 | 40 |
| Example 3 | 540 | 470 | 46 | 41 |
| Example 4 | 620 | 540 | 40 | 38 |
| Example 5 | 565 | 485 | 39 | 37 |
| Example 6 | 540 | 485 | 40 | 42 |
| Comparative example 1 | 620 | 565 | 35 | 20 |
| Comparative example 2 | 530 | 435 | 42 | 38 |
| Comparative example 3 | 575 | 522 | 40 | 35 |
| Comparative example 4 | 580 | 530 | 40 | 35 |
| Comparative example 5 | 585 | 540 | 38 | 33 |
The welding wires in the embodiments 1 to 6 can be welded in all directions, the arc is stable, the spatter is less, the forming is attractive, the slag is easy to remove, no air holes or slag are generated, and the like, and meanwhile, as can be seen from the table 1, the deposited metal layers welded by the welding wires in the embodiments 1 to 6 have good tensile strength, yield strength, elongation and impact power;
although the mechanical properties of the deposited metal of comparative examples 1-2 in table 1 are similar to those of the deposited metal of the examples of the present application, the welding process performance of the flux core of comparative examples 1-2 is deteriorated after the flux core composition exceeds the limited range of the present application, such as poor liquid metal fluidity, air holes, high weld bead thickness, incapability of vertical welding, slag sticking, slag breaking and the like in the welding process of the welding wire obtained in comparative example 1, and large splashing, air holes, slag sticking and slag breaking phenomena in comparative example 2; therefore, the proportioning range of the flux-cored components can not only ensure the technological performance of the welding wire during welding, but also effectively ensure that the deposited metal layer has good mechanical performance;
compared with the prior art, the welding method has the advantages that after the titanium iron and the aluminum magnesium alloy are lacked in the comparative example 3, the surface tension and the viscosity of the liquid metal are high during welding, so that gas in the liquid metal cannot escape to generate pores, the welding seam is poor in forming, and vertical welding cannot be carried out;
in the comparative example 4, after the sodium fluoride and the lithium fluoride with the same quantity are used for replacing the sodium fluosilicate and the cryolite with the same quantity, the phenomena of slag adhesion, air holes and the like occur in the welding process;
comparative example 5 equal amounts of sodium fluoride and lithium fluoride were used instead of equal amounts of sodium fluorosilicate and cryolite, and after potassium feldspar and iron sand were not added to the flux core ingredients, there were large splashes during welding, the fluidity of the liquid metal was poor, and slag adhesion occurred, and as can be seen from table 1, the impact resistance at low temperature was also reduced.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. A self-protecting flux-cored wire for rutile austenitic stainless steel is characterized in that: the composite material comprises a 304L stainless steel strip outer skin and a flux core, wherein the flux core is prepared by mixing 22-28 wt% of rutile, 3-5 wt% of potassium feldspar, 2-5 wt% of quartz, 0.1-0.5 wt% of bismuth oxide, 1.0-2.5 wt% of sodium fluosilicate, 1.0-2.5 wt% of cryolite, 2-5 wt% of potassium titanate, 1.5-3 wt% of iron sand, 4-7 wt% of manganese powder, 20-25 wt% of chromium powder, 10-15 wt% of nickel powder, 2-4 wt% of ferrotitanium, 0.5-3 wt% of aluminum-iron alloy, 2-4 wt% of silicon-zirconium alloy and the balance of iron powder; the total fluoride content is more than or equal to 3 percent.
2. The self-shielded flux-cored wire of rutile austenitic stainless steel of claim 1, wherein: the flux core is prepared by mixing 23-27 wt% of rutile, 3.5-4.5 wt% of potassium feldspar, 2.5-4 wt% of quartz, 0.2-0.4 wt% of bismuth oxide, 1.5-2.5 wt% of sodium fluosilicate, 1.5-2.5 wt% of cryolite, 2-5 wt% of potassium titanate, 1.5-3 wt% of iron sand, 4.5-7 wt% of manganese powder, 21-25 wt% of chromium powder, 10-14 wt% of nickel powder, 2.5-4 wt% of ferrotitanium, 1.0-3 wt% of aluminum-iron alloy, 1.0-3 wt% of silicon-zirconium alloy and the balance of iron powder.
3. The self-shielded flux-cored wire of rutile-type austenitic stainless steel of claim 1 or 2, wherein: the ferrotitanium comprises 25-35 wt% of titanium, 50-55 wt% of aluminum in aluminum-magnesium alloy, 50-55 wt% of aluminum in aluminum-iron alloy, and 47-52 wt% of silicon in silicon-zirconium alloy.
4. The self-shielded flux-cored wire of rutile-type austenitic stainless steel of claim 1 or 2, wherein: the total weight of the ferrotitanium, the aluminum-magnesium alloy, the ferroaluminum alloy and the silicon-zirconium alloy is more than or equal to 6.5 percent.
5. The self-shielded flux-cored wire of rutile austenitic stainless steel of claim 1, wherein: the filling rate of the flux-cored wire is 23-26%.
6. The self-shielded flux-cored wire of rutile austenitic stainless steel of claim 1, wherein: the diameter of the flux-cored wire is 1.2 or 1.6 mm.
7. The self-shielded flux-cored wire of rutile-type austenitic stainless steel of claim 1 or 2, wherein: the deposited metal components of the flux-cored wire comprise, by mass, 0.014-0.031% of C, 0.397-0.489% of Si, 1.34-1.71% of Mn, 19.58-21.85% of Cr, 9.45-11.92% of Ni, 0.0013-0.0082% of S, 0.017-0.022% of P, and the balance Fe.
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| CN102009287A (en) * | 2010-12-13 | 2011-04-13 | 首钢总公司 | Electrogas welding gas shield flux-cored wire for large heat input welding |
| CN102229029A (en) * | 2011-05-30 | 2011-11-02 | 中冶焊接科技有限公司 | Flux-cored wire for austenitic stainless steel all-position welding |
| CN102451961A (en) * | 2010-10-20 | 2012-05-16 | 中冶焊接科技有限公司 | Flux-cored wire for austenitic stainless steel welding |
| CN103418940A (en) * | 2012-05-23 | 2013-12-04 | 中冶焊接科技有限公司 | Flux-cored wire for titanium- or niobium-contained austenitic stainless steel welding |
| CN103480981A (en) * | 2013-09-22 | 2014-01-01 | 北京工业大学 | 347 stainless steel flux-cored wire low in hexavalent chromium discharge |
-
2020
- 2020-12-16 CN CN202011489438.2A patent/CN112372175B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102451961A (en) * | 2010-10-20 | 2012-05-16 | 中冶焊接科技有限公司 | Flux-cored wire for austenitic stainless steel welding |
| CN102009287A (en) * | 2010-12-13 | 2011-04-13 | 首钢总公司 | Electrogas welding gas shield flux-cored wire for large heat input welding |
| CN102229029A (en) * | 2011-05-30 | 2011-11-02 | 中冶焊接科技有限公司 | Flux-cored wire for austenitic stainless steel all-position welding |
| CN103418940A (en) * | 2012-05-23 | 2013-12-04 | 中冶焊接科技有限公司 | Flux-cored wire for titanium- or niobium-contained austenitic stainless steel welding |
| CN103480981A (en) * | 2013-09-22 | 2014-01-01 | 北京工业大学 | 347 stainless steel flux-cored wire low in hexavalent chromium discharge |
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| Publication number | Publication date |
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| CN112372175A (en) | 2021-02-19 |
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