CN104858568A - Gas shielded flux cored welding wire resistant to sulfuric acid dew point corrosion, and preparation method thereof - Google Patents
Gas shielded flux cored welding wire resistant to sulfuric acid dew point corrosion, and preparation method thereof Download PDFInfo
- Publication number
- CN104858568A CN104858568A CN201510149333.5A CN201510149333A CN104858568A CN 104858568 A CN104858568 A CN 104858568A CN 201510149333 A CN201510149333 A CN 201510149333A CN 104858568 A CN104858568 A CN 104858568A
- Authority
- CN
- China
- Prior art keywords
- flux
- sulfuric acid
- gas shielded
- dew point
- cored wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- 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
- B23K35/3608—Titania or titanates
-
- 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
- B23K35/22—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
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
-
- 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
- B23K35/406—Filled tubular wire or rods
Abstract
The invention discloses a gas shielded flux cored welding wire resistant to sulfuric acid dew point corrosion, and a preparation method thereof. The welding wire is the gas shielded flux cored welding wire formed by filling a mild-carbon steel strip outer sheath with a flux core, wherein the flux core basically comprises the following components in percentage by weight: 35-45% of TiO2, 8-12% of SiO2, 2-4% of ZrO2, 3-4.5% of Na2O and K2O, 15-20% of ferroalloy, 4-6% of Al2O3, 12-16% of Fe and 1-2% of Sb2O3; all of the components are pretreated and blended, and then the mixture is dried to prepare filling flux powder; the steel strip is rolled to be U-shaped through a forming roller, and then the U-shaped steel strip is filled with the flux powder to be rolled to be tube-shaped, wherein the flux powder filling rate is 12-20%; then the tube-shaped steel strip is subjected to drawing for diameter reduction to obtain the flux-cored wire in the specified dimension. Through adoption of the flux-cored welding wire, weld metal is excellent in sulfuric acid dew point corrosion resistance, and the properties of deposited metal and welding joints are excellent; the flux-cored welding wire has better performance and higher efficiency compared with those of commonly used welding rods, gas shielded solid wires, TIG welding wires and the like which are used in welding processes, and is low in comprehensive cost, relatively energy-saving, and more suitable for automatic production.
Description
Technical field
The present invention relates to welding material, be specifically related to a kind of gas shielded flux cored wire for corrosionproof steel against sulfuric acid at dew point.
Background technology
Use the equipment of heavy oil or sulfurous fuels or prepare in the industrial equipment of sulfuric acid, lower ground just liquid is condensed in conjunction with the steam in flue gas at pipe temperature owing to being incubated the bad sulfur trioxide that causes, thus cause corrosive pipeline to be called dew point corrosion, also known as cold end corrosion.
Steel are used to need good corrosion resistance to sulfuric acid dew point thus, as JNS acid resisting steel, PNS acid resisting steel, ND steel (09CrCuSb) etc., the current domestic and international optimal low-temperature dew point corrosion of resistance to sulfuric acid is 09CrCuSb with steel, the welding material mated with these type of steel has stick electrode, gas protects solid welding wire, TIG welding wire, and the welding material mated with steel should meet following some: the resistant to sulfuric acid dew point corrosion of weld metal, deposited metal and property of welded joint excellence, the welding technological properties of conventional wlding is better more at present, efficiency is higher, integrated cost is low, more energy-conservation, and be more applicable to automated production.But, the flux-cored wire product also do not matched at present.
Summary of the invention
For problem existing on existing corrosionproof steel against sulfuric acid at dew point welding material, an object of the present invention is to provide a kind of excellent performance, the gas shielded flux cored wire matched.
Two of object of the present invention is, for above-mentioned flux-cored wire, to provide corresponding preparation method.
In order to achieve the above object, the present invention adopts following technical scheme:
For object 1: a kind of gas shielded flux cored wire for corrosionproof steel against sulfuric acid at dew point, described flux-cored wire is made up of crust and welding wire medicine core, each component that described welding wire medicine core comprises and shared percentage by weight as follows:
In the preferred version of this flux-cored wire, the crust of described flux-cored wire adopts mild-carbon steel strip, and filling rate is 12% ~ 20%.
Further, protective gas during described metal core welding wire welding is the CO that purity is greater than 99.5%
2.
For object 2: a kind of preparation method of the gas shielded flux cored wire for corrosionproof steel against sulfuric acid at dew point; described preparation method; first each component of above-mentioned welding wire medicine core is carried out pretreatment and preparation according to corresponding percentage by weight; dry again after mixing and be prepared into filling medicinal powder; then steel band is passed through molding roller rolling " U " type; then insert medicinal powder and be rolled into tubulose, then through hot candied tube reducing to the flux-cored wire finished product of regulatory specifications.
In this preparation method, the filling rate of described medicinal powder is between 12 ~ 20%.
Based on the flux-cored wire of the corrosionproof steel against sulfuric acid at dew point that such scheme is formed, than welding material efficient energy-saving conventional at present, integrated cost is low, welding technological properties good, and is applicable to automated production equipment use.Meet the requirement of the welding material of coupling corrosionproof steel against sulfuric acid at dew point kind completely, weld metal is suitable with matrix corrosion resisting property, and deposited metal is suitable with parent metal performance, good knitting.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with instantiation, setting forth the present invention further.
Gas shielded flux cored wire provided by the invention, can match with the low-temperature dew point corrosion of resistance to sulfuric acid steel, and this gas shielded flux cored wire is made up of mild-carbon steel strip crust and welding wire medicine core, and each component of its Chinese medicine core and proportion are:
Above ratio is weight percentage.
The gas shielded flux cored wire weld metal resistant to sulfuric acid dew point corrosion formed thus; due to the welding wire medicine core of this gas shielded flux cored wire, mainly containing the alloying element of the sulfuric-resisting dew point corrosion such as Cu, Cr, Sb, (wherein Cu, Cr alloying element adds in ferroalloy mode, and element sb is the Sb in component
2o
3), Cu and S reaction forms fine and close Cu at surface of steel plate
2s film, and then isolation Fe is with the contact of sulfuric acid solution, thus reduce the corrosion rate of steel; Cr resistance to sulfuric acid effect under the cooperation of Cu is just obvious, but content controls to be not more than 1% in deposited metal; In steel, Sb element can suppress anode reaction, forms Cu on steel surface simultaneously
2sb film stops sulfuric acid corrosion.The rational proportion of alloying element can make steel in corrosion process, generate the fine and close corrosion product being rich in Addition ofelements, and corrosion potential is moved to passivation region, keeps the electric current of relatively low maintenance passivation simultaneously, prevents sulfuric acid from corroding further.
As from the foregoing, this flux-cored wire weld metal resistant to sulfuric acid dew point corrosion, deposited metal and property of welded joint are excellent, it is better that the welding rod that flux-cored wire is more conventional, gas protect the welding technological properties such as solid welding wire, TIG welding wire, efficiency is higher, integrated cost is low, more energy-conservation, and be more applicable to automated production.
For upper gas shielded flux cored wire, complete preparation as follows:
First, above-mentioned gas is protected the component material of welding wire medicine core in flux-cored wire, carry out pretreatment and preparation according to corresponding percentage by weight, dry again after mixing and be prepared into filling medicinal powder;
Then, low-carbon cold rolling carbon steel steel band is rolled into U-lag by shaping unit;
Moreover add in the U-lag of steel band by the filling medicinal powder of preparation by certain filling rate through powder feeding machine group, medicinal powder filling rate controls 12 ~ 20%, and is rolled into tubulose;
Finally, through drawing tube reducing to the tubulose flux-cored wire finished product of regulatory specifications.
The gas shielded flux cored wire made accordingly, when welding, adopts automatically or semi-automatic welding mode, the CO that welding protection gas adopts purity to be greater than 99.5%
2.
Above-mentioned flux-cored wire weld metal resistant to sulfuric acid dew point corrosion, deposited metal and property of welded joint are excellent, it is better that welding rod conventional comparatively at present, gas protect the welding technological properties such as solid welding wire, TIG welding wire, efficiency is higher, integrated cost is low, more energy-conservation, and be more applicable to automated production.
Below in conjunction with specific embodiment, set forth the present invention program further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition any method similar or impartial to described content and material all can be applicable in the present invention.
Specific embodiments is as table 1:
Table 1 specific embodiments
| Scheme | TiO 2 | SiO 2 | ZrO 2 | Na 2O+K2O | Ferroalloy | Al 2O 3 | Fe | Sb 2O 3 | Filling rate |
| Example 1 | 45 | 10 | 4 | 4 | 15 | 5 | 16 | 1 | 20％ |
| Example 2 | 40 | 12 | 3 | 3 | 20 | 5 | 15 | 2 | 12％ |
| Example 3 | 38 | 12 | 4 | 4.5 | 18 | 6 | 16 | 1.5 | 18％ |
Above example chemical composition and mechanical property are as shown in table 2 and table 3:
Table 2
Table 3
| Performance | Yield strength (MPa) | Tensile strength Rm (MPa) | Percentage elongation (%) |
| Mother metal | ≥245 | 390～550 | ≥25 |
| Weld seam | ≥340 | ≥440 | ≥22 |
From above-mentioned example, based on the gas shielded flux cored wire that this programme is formed, chemical composition and the mechanical property of weld metal are mated with mother metal, meet the demand of mother metal to wlding.And processing performance is good, beautiful appearance, de-slag easily, splash little, meet the requirement of steel to welding material completely.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1., for a gas shielded flux cored wire for corrosionproof steel against sulfuric acid at dew point, described flux-cored wire is made up of crust and welding wire medicine core, it is characterized in that, each component that described welding wire medicine core comprises and shared percentage by weight as follows:
2. a kind of gas shielded flux cored wire for corrosionproof steel against sulfuric acid at dew point according to claim 1, is characterized in that, the crust of described flux-cored wire adopts mild-carbon steel strip, and filling rate is 12% ~ 20%.
3. a kind of gas shielded flux cored wire for corrosionproof steel against sulfuric acid at dew point according to claim 1, is characterized in that, protective gas during described metal core welding wire welding is the CO that purity is greater than 99.5%
2.
4. the preparation method for the gas shielded flux cored wire of corrosionproof steel against sulfuric acid at dew point, it is characterized in that, described preparation method, first each component of welding wire medicine core in gas shielded flux cored wire described in claim 1 is carried out pretreatment and preparation according to corresponding percentage by weight, dry again after mixing and be prepared into filling medicinal powder; Then steel band is passed through molding roller rolling " U " type; Then insert medicinal powder and be rolled into pipe, then pass through the flux-cored wire finished product of hot candied tube reducing to regulatory specifications.
5. the preparation method of a kind of gas shielded flux cored wire for corrosionproof steel against sulfuric acid at dew point according to claim 4, it is characterized in that, the filling rate of described medicinal powder is between 12 ~ 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510149333.5A CN104858568A (en) | 2015-03-31 | 2015-03-31 | Gas shielded flux cored welding wire resistant to sulfuric acid dew point corrosion, and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510149333.5A CN104858568A (en) | 2015-03-31 | 2015-03-31 | Gas shielded flux cored welding wire resistant to sulfuric acid dew point corrosion, and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN104858568A true CN104858568A (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510149333.5A Pending CN104858568A (en) | 2015-03-31 | 2015-03-31 | Gas shielded flux cored welding wire resistant to sulfuric acid dew point corrosion, and preparation method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63260695A (en) * | 1987-04-15 | 1988-10-27 | Nippon Steel Corp | Production of flux cored wire for arc welding |
| CN1470356A (en) * | 2003-07-11 | 2004-01-28 | 北京工业大学 | Bismuthum-free fine-diameter stainless steel cored welding wire |
| CN101239429A (en) * | 2007-02-05 | 2008-08-13 | 天津市三英焊业有限责任公司 | Low dust high crack-resistance flux-cored wire all position flux-cored wire and preparation thereof |
| CN101450431A (en) * | 2007-12-06 | 2009-06-10 | 上海焊接器材有限公司 | Coated electrode for anti-sulphur dew point corrosion steel |
| CN101695798A (en) * | 2009-10-29 | 2010-04-21 | 台州海翔焊接材料有限公司 | Flux-cored wire |
| CN101705441A (en) * | 2009-11-24 | 2010-05-12 | 上海亘富冶金科技有限公司 | High-strength low-alloy steel resistant to sulfuric acid dew point corrosion |
| CN101892439A (en) * | 2009-05-21 | 2010-11-24 | 上海梅山钢铁股份有限公司 | Sulfuric acid dew point corrosion resistant steel |
| CN102825401A (en) * | 2011-06-14 | 2012-12-19 | 鞍钢股份有限公司 | Corrosion-resistant flux-cored welding wire used for gas shielded welding |
-
2015
- 2015-03-31 CN CN201510149333.5A patent/CN104858568A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63260695A (en) * | 1987-04-15 | 1988-10-27 | Nippon Steel Corp | Production of flux cored wire for arc welding |
| CN1470356A (en) * | 2003-07-11 | 2004-01-28 | 北京工业大学 | Bismuthum-free fine-diameter stainless steel cored welding wire |
| CN101239429A (en) * | 2007-02-05 | 2008-08-13 | 天津市三英焊业有限责任公司 | Low dust high crack-resistance flux-cored wire all position flux-cored wire and preparation thereof |
| CN101450431A (en) * | 2007-12-06 | 2009-06-10 | 上海焊接器材有限公司 | Coated electrode for anti-sulphur dew point corrosion steel |
| CN101892439A (en) * | 2009-05-21 | 2010-11-24 | 上海梅山钢铁股份有限公司 | Sulfuric acid dew point corrosion resistant steel |
| CN101695798A (en) * | 2009-10-29 | 2010-04-21 | 台州海翔焊接材料有限公司 | Flux-cored wire |
| CN101705441A (en) * | 2009-11-24 | 2010-05-12 | 上海亘富冶金科技有限公司 | High-strength low-alloy steel resistant to sulfuric acid dew point corrosion |
| CN102825401A (en) * | 2011-06-14 | 2012-12-19 | 鞍钢股份有限公司 | Corrosion-resistant flux-cored welding wire used for gas shielded welding |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150826 |