CN103785976A - Hot roll surfacing submerged arc flux-cored welding wire and preparation method for same - Google Patents
Hot roll surfacing submerged arc flux-cored welding wire and preparation method for same Download PDFInfo
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- CN103785976A CN103785976A CN201310694862.4A CN201310694862A CN103785976A CN 103785976 A CN103785976 A CN 103785976A CN 201310694862 A CN201310694862 A CN 201310694862A CN 103785976 A CN103785976 A CN 103785976A
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- welding wire
- flux
- hot roll
- submerged arc
- cored 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
- B23K35/02—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
- B23K35/24—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
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- 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
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
Abstract
The invention relates to a hot roll surfacing submerged arc flux-cored welding wire and a preparation method for the same. The hot roll surfacing submerged arc flux-cored welding wire comprises the following ingredients in percent by weight: 5%-14% of CaF2, 0%-5% of Na2SiF6, 0%-5% of BaCO3, 0.1%-0.4% of C, 2.0%-5.5% of Mn, 14%-28% of Cr, 0.8%-6% of Ni, 2%-4.8% of Si, 0.6%-4.8% of V, 0.8%-7.2% of W, 2%-6% of Mo and the balance Fe. A steel belt of the flux-cored welding wire is low-carbon, and the content of the carbon of the steel belt is smaller than 0.05%; and powder filling rate is 18%-28%, and the particle size of powder is 80-200 meshes. The submerged arc flux-cored welding wire has the advantages that metal alloy elements of a surfacing layer are distributed uniformly; carbide is scattered; the hardness is uniform; contents of impurities and diffusible hydrogen are low; the crack resistance, the thermal fatigue resistance and the wear resistance are high; the hardness of the surfacing layer is uniform; and the service life is long.
Description
Technical field
The present invention relates to field of welding material, relate in particular to a kind of hot roll built-up welding submerged arc flux-cored wire and preparation method thereof.
Background technology
Hot roll is the critical component of iron company, directly has influence on consumption, material cost and the maintenance expense of the output of production operational availability, rolled products of enterprise's rolling mill and quality, roll in its quality and service life.The course of work of hot roll is mainly born the wearing and tearing between metal and metal, and the abrasive wear that causes of the hard point such as surface of steel plate oxide skin, and hot roll more than 70% take wear out failure as main.Therefore require surfacing layer metal surface to there is high rigidity and high-wearing feature.When hot roll work simultaneously, the rolled parts that exceedes 900 ℃ with temperature contacts, and makes the maximum surface temperature of roll up to 600 ℃ of left and right, spray water again subsequently cooling, roll often rotates a circle and just stands the effect of a rapid heat cycle like this, and surface colds and heat succeed each other, and cold and hot fatigue cracking is serious.Therefore, require again it to have good cold & heat fatigue resisting.Heat fatigue cracking edge peels off, and the hard points such as spall and surface scale also can cause abrasive wear, and unstable wear lost efficacy.Roll contacts with high-temperature steel plate for a long time in addition, requires to have good red hardness, temper resistance and high temperature oxidation resistance.
In the face of severe condition of work like this, the hot roll flux-cored welding wire for overlaying welding of market supply now exists alloy element component deviation large mostly, skewness, make surfacing layer metal have larger thermal stress, be easy to cracking, fall piece, hardness number gap is large, cold & heat fatigue resisting and wearing no resistance, the defect such as service life is short.Therefore improve the performance of flux-cored wire, extend service life of hot roll, for improve iron and steel enterprise production efficiency, reduce production costs significant.
Summary of the invention
The hot roll built-up welding submerged arc flux-cored wire that the object of the present invention is to provide the high cracking resistance of a kind of high abrasion, has good welding operation performance, wearability and crack resistance.Mainly be applicable to the application of hot roll built-up welding.
For the existing bead-welding technology complexity of hot roll flux-cored wire in the past, overlay cladding is easy to produce heat, cold crack defect, surfacing layer metal hardness is inhomogeneous, wearability deficiency, the problem that service life is short, the present invention proposes one and comprises fritting alloyed powder, diffusible hydrogen inhibitor the heat treated submerged-arc welding flux-cored wire of process dehydrogenation, it is even that it has surfacing layer metal alloying elements distribution, carbide is disperse shape, hardness is even, impurity and diffusible hydrogen content are low, crack resistance is good, thermal fatigue resistance ability is strong, the even wearability of surfacing hardness is high, the feature of long service life.
Technical scheme of the present invention is:
A hot roll built-up welding submerged arc flux core for high cracking resistance high abrasion, its drug core component is by weight percentage: 5%～14%CaF
2, 0%～5%Na
2siF
6, 0%～5%BaCO
3, 0.4%～1.6%C, 2.0%～5.5%Mn, 14%～28%Cr, 0.8%～6%Ni, 2%～4.8%Si, 0.6%～4.8%V, 0.8%～7.2%W, 2%～6%Mo, surplus is Fe.
Alloyed powder Bian in drug core component makes fritting powder by aerosolization method, then adds in proportion in welding wire after mixing with mineral powder, makes the flux-cored wire that diameter is 3.2mm～5.0mm.
The preparation method of medicine core of the present invention: be that C, Cr, Mo, W, V and Ni are associated to the uniform fritting alloy powder of composition that bronze is the manufacture of aerosolization method, add fluoride and/or carbonate in medicine core simultaneously; Finished product welding wire is through the heat treatment of 300～450 ℃.
For improving the distributing homogeneity of alloying element in surfacing layer metal, adopt the aerosolization method in Ferrous Metallurgy, it is to utilize high velocity air directly to smash liquid metals and a kind of method of making metal dust.The basic procedure of gas-atomized powder is that alloy smelting, atomization, magnetic separation, dehydration, oven dry, high temperature reduction, muffin are pulverized, sieve division and combination is criticized.Adopting aerosolization method that carbon evanohm, ferromanganese, ferrosilicon, metallic nickel, vanadium iron, ferrotungsten, molybdenum-iron and iron powder in medicine core are connect to ratio adds melt in furnace, atomization to make the uniform single powder of composition, pass through magnetic separation, sieve, close and criticize, check to meet through composition to be again predetermined to be a point requirement, just become the alloy powder that can be used for manufacturing flux-cored wire.
Than multiple alloyed powder mechanical mixture effect, aerosolization alloyed powder has improved overlay cladding alloying elements distribution uniformity greatly, has reduced impurity content, and this,, to increasing the uniformity of surfacing layer metal hardness, improves thermal fatigue resistance and wearability.Reduce the thermal stress being caused by composition, Tissue distribution inequality, thereby the fire check sensitiveness of minimizing weld seam is very favourable simultaneously.In welding wire medicine core formula, add the diffusible hydrogen such as fluoride, carbonate inhibitor, drawing welding wire is after finished size simultaneously, the lubricant of welding wire remained on surface is carried out to mechanical chipping, and carry out the heat treatment of 300～450 ℃, further to reduce weld seam diffusible hydrogen, this is for reducing cold crack in weld seam, prevents that piece from appearring falling in weld metal and the too early destruction of causing has important function.
The design considerations of drug core component of the present invention is:
C: be strong austenitizing forming element and reduction Ms point element.In the design of resurfacing welding material, C is most important intensified element, is also to cause crisp element simultaneously.C has the effect of gap solution strengthening, increases the content of C in material, will impel the formation of twin crystal martensite, increases carbide quantity, reduces carbonization material dot spacing, increases post-curing peak value, obtains high hardness.But the increase of C content can make the impact toughness of material decline.
Cr: improve quenching degree, produce solution strengthening, promote the formation of M, in ferrochrome, in the time that Cr content is in 26%, the impact toughness of alloy can increase along with the increase of Cr content, but exceedes 26%, and impact toughness can sharply decline.The post-curing peak temperature of Cr is 500 ℃ of left and right.
V: be strong ferrite former, because itself and carbon, nitrogen, oxygen have strong adhesion, will form the very strong compound of corresponding stability, in steel, V is main post-curing element, and its peak temperature is greatly about 600～625 ℃.A small amount of V can crystal grain thinning, thereby improves intensity and the toughness of steel, but in the time that they are large numbers of, toughness that will damage steel.
W: can increase quenching degree, produce solution strengthening, suppress temper brittleness, appropriate interpolation, is conducive to the raising of impact toughness.The W elements adding, major part is distributed in solid solution, a small amount of carbide that enters into, when tempering time is longer, the Carbide Phases of formation is relatively many.W is one of important element improving the high-temperature stability of steel.
Si: be strong ferrite former, Si, except improving in ferrite and austenite the effect of solution strengthening, also has deoxidation, reduces the oxygen content in weld seam, thereby reduces the detrimental effect of oxygen Resistance of Weld Metal.
Mn: be stable austenite element, reduce Ms point, improve quenching degree.In addition, Mn or good deoxidier and desulfurizing agent, Mn and Si synergy are conducive to reduce the oxygen content in weld seam, be combined with S and form MnS, the FeS that prevents low melting point forms, and prevents from producing in weld metal the tendency of fire check, improves the ability of the heat resistanceheat resistant crackle of weld seam.Mn and iron can form solid solution, improve ferrite and austenitic intensity and hardness in steel, are again weak carbide formers simultaneously, replace the part Fe in cementite, form compound cementite.But excessive Mn content will make the grain coarsening of steel, the ductility of steel is reduced, toughness declines.
In the present invention, the steel band of flux-cored wire adopts the mild-carbon steel strip that carbon content is less than 0.05%, and the content of wherein controlling impurity element sulphur in steel band is less than 0.008%, and the content of phosphorus is less than 0.015%, and the content of nitrogen is less than 50ppm.The filling rate of medicinal powder is 18%～28%, and the granularity of medicinal powder is 80～200 orders.Steel band is rolled into after U-shaped and adds medicinal powder, seal into O type, and be drawn to finished size, the diameter of finished product welding wire is 3.2mm～5.0mm.
The present invention proposes one and comprises fritting alloyed powder, diffusible hydrogen inhibitor the heat treated submerged-arc welding flux-cored wire of process dehydrogenation, have surfacing layer metal alloying elements distribution evenly, carbide be disperse shape, hardness evenly, impurity and diffusible hydrogen content low, crack resistance is good, thermal fatigue resistance ability is strong, and the even wearability of surfacing hardness is high, the feature of long service life.
The specific embodiment
Alloyed powder except mineral powder in the each embodiment providing in table 1 is made to fritting alloyed powder by aeroponics, after mixing with the mineral powder of giving certainty ratio in formula, pack U-shaped steel coil strip into, then be drawn into the welding wire that diameter is 4.0mm, for hot roll built-up welding, draw the hardness of the deposited metal that respective table 1 provides, the crack resistance of deposited metal is high, wearability good.
Table 1 embodiment drug core component and deposited metal performance
In the embodiment of the present invention, being described as follows of various raw materials:
C: be strong austenitizing forming element and reduction Ms point element.In the design of resurfacing welding material, C is most important intensified element, is also to cause crisp element simultaneously.C has the effect of gap solution strengthening, increases the content of C in material, will impel the formation of twin crystal martensite, increases carbide quantity, reduces carbonization material dot spacing, increases post-curing peak value, obtains high hardness.But the increase of C content can make the impact toughness of material decline.
Cr: improve quenching degree, produce solution strengthening, promote the formation of M, in ferrochrome, in the time that Cr content is in 26%, the impact toughness of alloy can increase along with the increase of Cr content, but exceedes 26%, and impact toughness can sharply decline.The post-curing peak temperature of Cr is 500 ℃ of left and right.
V: be strong ferrite former, because itself and carbon, nitrogen, oxygen have strong adhesion, will form the very strong compound of corresponding stability, in steel, V is main post-curing element, and its peak temperature is greatly about 600～625 ℃.A small amount of V can crystal grain thinning, thereby improves intensity and the toughness of steel, but in the time that they are large numbers of, toughness that will damage steel.
W: can increase quenching degree, produce solution strengthening, suppress temper brittleness, appropriate interpolation, is conducive to the raising of impact toughness.The W elements adding, major part is distributed in solid solution, a small amount of carbide that enters into, when tempering time is longer, the Carbide Phases of formation is relatively many.W is one of important element improving the high-temperature stability of steel.
Si: be strong ferrite former, Si, except improving in ferrite and austenite the effect of solution strengthening, also has deoxidation, reduces the oxygen content in weld seam, thereby reduces the detrimental effect of oxygen Resistance of Weld Metal.
Mn: be stable austenite element, reduce Ms point, improve quenching degree.In addition, Mn or good deoxidier and desulfurizing agent, Mn and Si synergy are conducive to reduce the oxygen content in weld seam, be combined with S and form MnS, the FeS that prevents low melting point forms, and prevents from producing in weld metal the tendency of fire check, improves the ability of the heat resistanceheat resistant crackle of weld seam.Mn and iron can form solid solution, improve ferrite and austenitic intensity and hardness in steel, are again weak carbide formers simultaneously, replace the part Fe in cementite, form compound cementite.But excessive Mn content will make the grain coarsening of steel, the ductility of steel is reduced, toughness declines.
The preparation method of medicine core: be that C, Cr, Mo, W, V and Ni are associated to the uniform fritting alloy powder of composition that bronze is the manufacture of aerosolization method, add fluoride and/or carbonate in medicine core simultaneously; Finished product welding wire is through the heat treatment of 300～450 ℃.For improving the distributing homogeneity of alloying element in surfacing layer metal, adopt the aerosolization method in Ferrous Metallurgy, adopting aerosolization method that carbon evanohm, ferromanganese, ferrosilicon, metallic nickel, vanadium iron, ferrotungsten, molybdenum-iron and iron powder in medicine core are connect to ratio adds melt in furnace, atomization to make the uniform single powder of composition, pass through magnetic separation, sieve, close and criticize, check to meet through composition to be again predetermined to be a point requirement, just become the alloy powder that can be used for manufacturing flux-cored wire.
In the present invention, the steel band of flux-cored wire adopts the mild-carbon steel strip that carbon content is less than 0.05%, and the content of wherein controlling impurity element sulphur in steel band is less than 0.008%, and the content of phosphorus is less than 0.015%, and the content of nitrogen is less than 50ppm.The filling rate of medicinal powder is 18%～28%, and the granularity of medicinal powder is 80～200 orders.Steel band is rolled into after U-shaped and adds medicinal powder, seal into O type, and be drawn to finished size, the diameter of finished product welding wire is 3.2mm～5.0mm.
Superiority of the present invention is that surfacing layer metal has high cracking resistance, good wearability and cold & heat fatigue resisting ability, thereby improves the service life of hot roll.
Claims (3)
1. a hot roll built-up welding submerged arc flux-cored wire, is characterized in that drug core component is by weight percentage: 5%～14%CaF
2, 0%～5%Na
2siF
6, 0%～5%BaCO
3, 0.1%～0.4%C, 2.0%～5.5%Mn, 14%～28%Cr, 0.8%～6%Ni, 2%～4.8%Si, 0.6%～4.8%V, 0.8%～7.2%W, 2%～6%Mo, surplus is Fe.
2. the preparation method of the welding wire of claim 1, is characterized in that it is the uniform fritting alloy powder of composition that aerosolization method is manufactured that C, Cr, Mo, W, V and Ni are associated to bronze, adds fluoride and/or carbonate in medicine core simultaneously; Finished product welding wire is through the heat treatment of 300～450 ℃.
3. flux-cored wire as claimed in claim 1, is characterized in that the mild-carbon steel strip that flux-cored wire adopts carbon content to be less than 0.05%; The filling rate of drug core component is 18%～28%,, the granularity of medicinal powder is 80～200 orders; The diameter of finished product welding wire is 3.2mm～5.0mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310694862.4A CN103785976A (en) | 2013-12-13 | 2013-12-13 | Hot roll surfacing submerged arc flux-cored welding wire and preparation method for same |
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|---|---|---|---|
| CN201310694862.4A CN103785976A (en) | 2013-12-13 | 2013-12-13 | Hot roll surfacing submerged arc flux-cored welding wire and preparation method for same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104404427A (en) * | 2014-09-17 | 2015-03-11 | 莱芜职业技术学院 | Preparation of powder cored wire material containing amorphous phase high wear resistant coating |
| US9962748B2 (en) | 2014-06-19 | 2018-05-08 | Nippon Steel & Sumikin Hardfacing Co., Ltd. | Roll for winding equipment in hot rolling factory |
| CN110076478A (en) * | 2019-06-10 | 2019-08-02 | 四川鸿舰重型机械制造有限责任公司 | Rare earth hardfacing materials for blast furnace top bell series of products |
| CN113579548A (en) * | 2021-07-07 | 2021-11-02 | 四川大西洋焊接材料股份有限公司 | Welding rod, preparation method and application thereof and deposited metal |
| CN114101966A (en) * | 2021-11-19 | 2022-03-01 | 济南法瑞钠焊接器材股份有限公司 | Micro-smoke environment-friendly carbon steel flux-cored wire |
| CN114248039A (en) * | 2021-12-20 | 2022-03-29 | 武汉铁锚焊接材料股份有限公司 | High-strength anti-crack metal powder core type submerged arc welding wire for engineering machinery and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114101966A (en) * | 2021-11-19 | 2022-03-01 | 济南法瑞钠焊接器材股份有限公司 | Micro-smoke environment-friendly carbon steel flux-cored wire |
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| CN114248039A (en) * | 2021-12-20 | 2022-03-29 | 武汉铁锚焊接材料股份有限公司 | High-strength anti-crack metal powder core type submerged arc welding wire for engineering machinery and application |
| CN114248039B (en) * | 2021-12-20 | 2023-03-07 | 武汉铁锚焊接材料股份有限公司 | High-strength anti-crack metal powder core type submerged arc welding wire for engineering machinery and application |
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Application publication date: 20140514 |