CN105290635A - Acid electrode coat for duplex stainless steel welding and preparation method for acid electrode coat - Google Patents
Acid electrode coat for duplex stainless steel welding and preparation method for acid electrode coat Download PDFInfo
- Publication number
- CN105290635A CN105290635A CN201510563907.3A CN201510563907A CN105290635A CN 105290635 A CN105290635 A CN 105290635A CN 201510563907 A CN201510563907 A CN 201510563907A CN 105290635 A CN105290635 A CN 105290635A
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- CN
- China
- Prior art keywords
- ferromanganese
- stainless steel
- welding rod
- ferrotianium
- welding
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Classifications
-
- 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
-
- 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
- B23K35/3601—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 with inorganic compounds as principal constituents
-
- 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)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a formula for a high-strength duplex stainless steel acid electrode coat. The coat is composed of, by mass, 7%-26% of dolomite, 3%-8% of fluorite, 35%-45% of rutile, 5%-9% of ferromanganese, 3%-10% of ferrotitanium, 1%-4% of titanium dioxide, 6%-22% of feldspar, 3%-15% of white mud, 1.2%-1.8% of mica and 1.5%-5.2% of chalk, and the sum of mass percents of all constituents is 100%. A powder binder is potassium sodium mixed water glass, and 28g-35g of the water glass is added into a powder material of each 100g. According to an electrode produced through the coat, performances of striking the arc and stabilizing the arc are good, the amount of smoke dust and splashes during welding is smaller, the slag detachability is good, and formed weld passes are uniform and attractive, and have no pores.
Description
Technical field:
The invention belongs to materials processing technology field, the present invention relates to a kind of acidic electrode material, particularly a kind of acidic electrode coating, the invention still further relates to the preparation method of this welding rod.
Background technology:
Along with the development of modern industrial technology, stainless steel, with its excellent mechanical performance, corrosion resistance, is widely used, but its Welding Problems is also more aobvious outstanding.In actual welding process, there is larger difference in the obdurability of welding point and the Strengthening and Toughening level of mother metal, especially the comprehensive mechanical performance of welding point HAZ is poor, and this just makes the production cost of product increase, and easily causes security incident.
Document shows, stainless steel electrode usually adopts acid coating, and main cause is that acidic electrode has very good welding technological properties, effectively phosphorus content can be reduced in welding process, reduce C and Cr in deposited metal and, in conjunction with segregation, reduce Cr depletion zone, thus strengthen the ability of weld seam anti intercrystalline corrosion.So comprehensive above analysis, and in conjunction with stainless steel electrode practical production experience, determine that the slag system of electrode coating is TiO
2-CaO-SiO
2, this electrode coating of design is by being defined as oxidation lime-titania type.
Summary of the invention:
The object of this invention is to provide a kind of acidic electrode, for two phase stainless steel provides welding material, improve weld strength and impact flexibility.
The technical solution adopted in the present invention is, a kind of high strength dual phase stainless steel electrode coating, and this material is composed of the following components by mass percentage: the dolomite of 7%-26%, the fluorite of 3%-8%, the rutile of 35%-45%, the ferromanganese of 5%-9%, the ferrotianium of 3%-10%, the titanium dioxide of 1%-4%, the feldspar of 6%-22%, the white clay of 3%-15%, the mica of 1.2%-1.8%, the chalk of 1.5%-5.2%, the mass percent sum of each component is 100%.Medicinal powder binding agent is potassium sodium mixing water glass, and every 100g expects that powder adds 30g-33g.
Feature of the present invention is also:
By controlling the additional proportion of deoxidier (ferrotianium, ferromanganese), weld seam is made to obtain excellent mechanical performances.
The invention has the beneficial effects as follows, electrode coating and ER2209 core wire (d=4.0mm) match, the welding rod produced, stabilising arc is functional, molten bath good fluidity, and splashing particle is tiny, deslag after welding is easy, and slag covers evenly, and appearance of weld is careful attractive in appearance.The welding rod impact flexibility of development has and comparatively significantly improves.
Accompanying drawing illustrates:
Fig. 1 is the metallographic structure photo of Weld pipe mill after the welding rod welding using the embodiment of the present invention 1 to produce;
Fig. 2 is the metallographic structure photo of Weld pipe mill after the welding rod welding using the embodiment of the present invention 2 to produce.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is described in further detail:
See Fig. 1,2, below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The invention provides a kind of high strength dual phase stainless steel acidic electrode coating, composed of the following components according to this material of mass percent: the dolomite of 7%-26%, the fluorite of 3%-8%, the rutile of 35%-45%, the ferromanganese of 5%-9%, the ferrotianium of 3%-10%, the titanium dioxide of 1%-4%, the feldspar of 6%-22%, the white clay of 3%-15%, the mica of 1.2%-1.8%, the chalk of 1.5%-5.2%, the mass percent sum of each component is 100%.Medicinal powder binding agent is potassium sodium mixing water glass, and every 100g expects that powder adds 28g-35g.
The effect of each component in coating:
The main component of dolomite is CaMg (CO
3)
2, in electrode coating, Main Function is gas making and slag making, and it also plays a role to the stable of electric arc simultaneously.In welding process, its main oxidation product CaO, MgO, can play the effect of effective desulfurization, phosphorus in weld metal.Oxidation product MgO, can improve slag gas permeability, and the gas in molten bath is more easily overflowed in its process of solidifying, and reduces the tendency of stomatal limiting value, reduces the content of diffusible hydrogen, can also increase slag surface tension force, be conducive to the welding rod removability of slag.In the present invention, the content of dolomite controls at 7%-26%.
The main chemical compositions of fluorite is CaF
2, its Main Function slag making and fall hydrogen.Its fusing point is lower, can dilute slag, reduces the fusing point of slag, thus improves electric conductivity and the mobility of slag.CaF
2can be combined with hydrogen, generate HF, play the effect of dehydrogenation.Improve the plasticity of weld seam and toughness and welding technological properties, in the present invention CaF
2content control between 3%-8%.
The main chemical compositions of rutile is TiO
2, it has vital effect to the raising of the welding rod removability of slag.Can make electrode coating in the process of welding fusing, realize the characteristic of " short slag ".TiO
2viscosity is at high temperature low, is conducive to sprawling of deposited metal, and rutile can also play the effect of stable arc.Rational TiO in electrode coating
2content, not only can stabilising arc but also reduce to splash, impel sprawling of deposited metal, reduce the formation of pore, the content of rutile controls between 35%-45% in the present invention.
The main chemical compositions of titanium dioxide is TiO
2, Main Function improves the extrusion processing performance of welding rod, makes electrode coating have good plasticity.The content of titanium dioxide controls between 1%-4% in the present invention.
Ferromanganese and ferrotianium are conventional deoxidiers, and also play the effect of alloying.
The main component of feldspar is SiO
2, wherein also containing Al
2o
3, K
2o, Na
2the materials such as O, Main Function improves the igniting property of welding rod, can smooth combustion, can lower the fusion temperature of electrode coating in right amount simultaneously, the tendency that when reducing welding rod burning, coating sleeve is long.The content of feldspar controls between 6%-22% in the present invention.
The main component of white clay is SiO
2, wherein containing Al
2o
3, Al
2o
3improve the centrality of electric arc, increase blow force of arc, slag surface tension force is improved, makes de-slag easy.The content of white clay controls between 3%-15% in the present invention.
There is the adding of mica stable arc, slag making improve the characteristic of welding rod extrusion processing performance, but content is unsuitable too many.Control between 1.2%-1.8% at the content of mica in the present invention.
The main chemical compositions of chalk is MgO, CaO, and its Main Function slag making, improves extrusion performance, can improve arc voltage, refinement molten drop, stable arc, improves welding rod fusing coefficient.Control between 1.5%-5.2% at the content of chalk in the present invention.
Embodiment 1
The dolomite of 13.8% is taken respectively, the fluorite of 3.4%, the titanium dioxide of 3.4%, the rutile of 45%, the ferrotianium of 3.6%, the ferromanganese of 3.8%, the feldspar of 16.5%, the white clay of 8.5%, the chalk of 2% according to mass percent electronic scale.Above-mentioned medicinal powder material is put into batch mixer mixing 15-20 minute together with 31 grams of potassium sodium mixing water glass, and mixed medicinal powder is put into balling press and is pressed into cylindrical medicine group, and potassium sodium mixing water glass is binding agent.
Welding rod is produced and is mainly carried out in electrode extrusion press, first the cylindrical medicine group obtained early stage is added, and medicine is rolled into a ball extrusion on ER2209 core wire, the welding rod made is put into batch-type furnace with low temperature 60 DEG C × 8h, high temperature of 120 DEG C × 1h, 180 DEG C × 1h, 250 DEG C × 1h, 350 DEG C × 1h, tetra-temperature sections carry out cascade raising temperature oven dry, have just made a kind of high strength dual phase stainless steel acidic electrode.
Cut steel plate 1 pair (steel plate of welding is two phase stainless steel) that specification is 170mm × 100mm × 15mm, monolateral double open 30 ° of grooves.Welding condition is as shown in table 1.Interlayer temperature controls at 200 DEG C ± 15 DEG C, and before weldering, welding rod is heated to 300 DEG C, be incubated 1 hour, weldment is without the need to preheating; Docking built-up welding is carried out to steel plate, is soldered to till double groove fills up.
Table 1 welding condition
Welding joint mechanical property is as shown in table 2, and Welded Joints carries out metallographic experiment, and Weld pipe mill metallographic structure as shown in Figure 1.
The mechanical property of table 2 welding rod deposited metal and processing performance
Embodiment 2
The dolomite of 25% is taken respectively, the fluorite of 4.5%, the titanium dioxide of 8.5%, the rutile of 35%, the ferrotianium of 5%, the ferromanganese of 4.5%, the feldspar of 6.5%, the white clay of 5.5%, the chalk of 5.5% according to mass percent electronic scale.Above-mentioned medicinal powder material is put into batch mixer mixing 15-20 minute together with 33 grams of potassium sodium mixing water glass, and then mixed medicinal powder is put into balling press and be pressed into cylindrical medicine group, potassium sodium mixing water glass is binding agent.
Welding rod is produced and is mainly carried out in electrode extrusion press, first the cylindrical medicine group obtained early stage is added, and medicine is rolled into a ball extrusion on ER2209 core wire, the welding rod made is put into batch-type furnace with low temperature 60 DEG C × 8h, high temperature of 120 DEG C × 1h, 180 DEG C × 1h, 250 DEG C × 1h, 350 DEG C × 1h, tetra-temperature sections carry out cascade raising temperature oven dry, have just made a kind of high strength dual phase stainless steel acidic electrode.
Cut steel plate 1 pair (steel plate of welding is two phase stainless steel) that specification is 170mm × 100mm × 15mm, monolateral double open 30 ° of grooves.Welding condition is as shown in table 2.Interlayer temperature controls at 200 DEG C ± 15 DEG C, and before weldering, welding rod is heated to 300 DEG C, be incubated 1 hour, weldment is without the need to preheating; Docking built-up welding is carried out to steel plate, is soldered to till double groove fills up.
Table 3 welding condition
Welding joint mechanical property is as shown in table 4, and Welded Joints carries out metallographic experiment, and Weld pipe mill metallographic structure as shown in Figure 2.
The mechanical property of table 4 welding rod deposited metal and processing performance
The present invention has following characteristics:
1. raw material of the present invention is easy to obtain, and needed raw material is all the more rich raw material of domestic deposit;
2. the present invention is mated with ER2209 welding wire, welds the Weld Performance obtained as follows for two phase stainless steel:
1) tensile strength sigma of weld seam
b>=655Mpa, yield strength σ
s>=450Mpa, impact flexibility mean value>=77J, percentage elongation mean value>=25%, the contraction percentage of area>=39%.
2) tissue of weld seam is mainly lath martensite and tempered sorbite line and staff control, also has portion of residual austenite and secondary-precipitated phase.
3. the present invention is mated with ER2209 welding wire, has good processing performance: striking and stabilising arc functional, in welding process flue dust and splash less, deslag performance is excellent, and welding bead uniform in shaping is attractive in appearance, pore-free.Above content is in conjunction with concrete preferred embodiment further description made for the present invention; can not assert that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention by submitted to claims determination scope of patent protection.
Claims (6)
1. a high strength dual phase stainless steel electrode coating, is characterized in that, this material is composed of the following components by mass percentage: the dolomite of 7%-26%, the fluorite of 3%-8%, the rutile of 35%-45%, the ferromanganese of 5%-9%, the ferrotianium of 3%-10%, the titanium dioxide of 1%-4%, the feldspar of 6%-22%, the white clay of 3%-15%, the mica of 1.2%-1.8%, the chalk of 1.5%-5.2%, the mass percent sum of each component is 100%.Medicinal powder binding agent is potassium sodium mixing water glass, and every 100g expects that powder adds 28g-35g.
2. welding rod according to claim 1, is characterized in that, described ferrotianium and ferromanganese form deoxidier, and the total content of deoxidier is 8%-19%.
3. welding rod according to claim 2, is characterized in that, described ferrotianium 3.6%, ferromanganese 3.8%; Or described ferrotianium 5%, ferromanganese 4.5%.
4. the preparation method of welding rod as described in claim 1,2 or 3, is characterized in that, implement according to following steps:
Step 1: make coating
The dolomite of 7%-26% is taken according to mass percent, the fluorite of 3%-8%, the rutile of 35%-45%, the ferromanganese of 5%-9%, the ferrotianium of 3%-10%, the titanium dioxide of 1%-4%, the feldspar of 6%-22%, the white clay of 3%-15%, the mica of 1.2%-1.8%, the chalk of 1.5%-5.2%, the mass percent sum of each component is 100%; Medicinal powder binding agent is potassium sodium mixing water glass, and every 100g expects that powder adds 28g-35g;
The above-mentioned material taken is mixed together with binding agent, and puts into batch mixer mixing 15-20 minute, mixed medicinal powder is pressed into cylindrical medicine group in balling press;
Step 2: make welding rod
Add in electrode extrusion press step 1 obtain cylindrical medicine group, medicine group extrusion on ER2209 core wire, then put into batch-type furnace cascade raising temperature dry, just made a kind of high strength dual phase stainless steel acidic electrode.
5. preparation method according to claim 4, is characterized in that, binding agent to be modulus be 3.5 potassium sodium mixing water glass.
6. preparation method according to claim 4, it is characterized in that, described cascade raising temperature baking step is specially: first carry out low temperature drying 8h with 60 DEG C, and then progressively carry out intensification with 120 DEG C, 180 DEG C, 250 DEG C, 350 DEG C four temperature sections and dry, the drying time of each temperature section is 1h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510563907.3A CN105290635A (en) | 2015-09-08 | 2015-09-08 | Acid electrode coat for duplex stainless steel welding and preparation method for acid electrode coat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510563907.3A CN105290635A (en) | 2015-09-08 | 2015-09-08 | Acid electrode coat for duplex stainless steel welding and preparation method for acid electrode coat |
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| CN105290635A true CN105290635A (en) | 2016-02-03 |
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|---|---|---|---|
| CN201510563907.3A Pending CN105290635A (en) | 2015-09-08 | 2015-09-08 | Acid electrode coat for duplex stainless steel welding and preparation method for acid electrode coat |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216880A (en) * | 2016-08-25 | 2016-12-14 | 安庆市天涯汽车配件有限公司 | A kind of production technology of stainless steel electrode |
| CN110773906A (en) * | 2019-11-22 | 2020-02-11 | 株洲湘江电焊条有限公司 | Stainless steel welding rod and preparation method thereof |
| CN112247400A (en) * | 2020-10-13 | 2021-01-22 | 浙江新锐焊接科技股份有限公司 | Inorganic bonding system for water-based environment-friendly brazing flux and application thereof |
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| US3059101A (en) * | 1959-03-17 | 1962-10-16 | Westinghouse Electric Corp | Welding electrode |
| US3597584A (en) * | 1968-07-31 | 1971-08-03 | Philips Corp | Welding wire for the electric arc welding in air |
| CN101323058A (en) * | 2008-07-25 | 2008-12-17 | 中国船舶重工集团公司第七二五研究所 | Acidic coating super two-phase stainless steel electrode |
| CN103084758A (en) * | 2013-01-23 | 2013-05-08 | 西安理工大学 | Titanium-calcium welding rod |
| TW201318754A (en) * | 2011-11-01 | 2013-05-16 | Sorex Welding Co Ltd | Dual-phase stainless steel welding rod |
| CN103921018A (en) * | 2014-04-25 | 2014-07-16 | 湖北船王特种焊材有限公司 | Superaustenitic stainless steel electrode |
-
2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3059101A (en) * | 1959-03-17 | 1962-10-16 | Westinghouse Electric Corp | Welding electrode |
| US3597584A (en) * | 1968-07-31 | 1971-08-03 | Philips Corp | Welding wire for the electric arc welding in air |
| CN101323058A (en) * | 2008-07-25 | 2008-12-17 | 中国船舶重工集团公司第七二五研究所 | Acidic coating super two-phase stainless steel electrode |
| TW201318754A (en) * | 2011-11-01 | 2013-05-16 | Sorex Welding Co Ltd | Dual-phase stainless steel welding rod |
| CN103084758A (en) * | 2013-01-23 | 2013-05-08 | 西安理工大学 | Titanium-calcium welding rod |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216880A (en) * | 2016-08-25 | 2016-12-14 | 安庆市天涯汽车配件有限公司 | A kind of production technology of stainless steel electrode |
| CN110773906A (en) * | 2019-11-22 | 2020-02-11 | 株洲湘江电焊条有限公司 | Stainless steel welding rod and preparation method thereof |
| CN112247400A (en) * | 2020-10-13 | 2021-01-22 | 浙江新锐焊接科技股份有限公司 | Inorganic bonding system for water-based environment-friendly brazing flux and application thereof |
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Application publication date: 20160203 |
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