CN101301709A - Tube wire for overlaying welding and preparation thereof - Google Patents
Tube wire for overlaying welding and preparation thereof Download PDFInfo
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- CN101301709A CN101301709A CNA2008101381147A CN200810138114A CN101301709A CN 101301709 A CN101301709 A CN 101301709A CN A2008101381147 A CNA2008101381147 A CN A2008101381147A CN 200810138114 A CN200810138114 A CN 200810138114A CN 101301709 A CN101301709 A CN 101301709A
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Abstract
The invention provides a tubular electrode used for surfacing welding, which is prepared by low-carbon steel band and powder grains wrapped in the low-carbon steel band, wherein, the longitudinal cross-section of the tubular electrode is a long flat shape or rectangle-similar; the powder grains in the pipe have the granularity of 50 meshes; according to the portions by weight, the powder comprises the components as follows: 40-70 portions of high-carbon ferrochrome, 5-30 portions of ferrovanadium, 0-6 portions of 75# ferrosilicon, 1-9 portions of high-carbon ferromanganese, 0-8 portions of aluminium-magnesium alloy, 2-15 portions of ferroboron, 1-6 portions of ferrotitanium, 2-8 portions of ferromolybdenum, 0-8 portions of graphite, 0-5 portions of fluorite and 0-6 portions of potassium titanate; the longitudinal length of the tubular electrode is 300-500mm; one end of the tubular electrode is provided with a flat area with the width of 8-68mm, thickness of 0.5-1.5mm and length of 8-20mm. The tubular electrode of the invention has large surfacing welding seam, beautiful forming and high surfacing welding efficiency, is easier to realize the automatic surfacing welding compared with the conventional electrodes, and can carry out the production of large batches.
Description
Technical field
The present invention relates to a kind of welding material, relate in particular to a kind of novel tube wire for overlaying welding and preparation method thereof.
Background technology
The machine components great majority are made with metal material, because between the part or the relative motion between part and the material, can wear and tear, further because machine components often are in unusual complicated and exacting terms work down, cause a large amount of mechanized equipments often to be scrapped because of wearing and tearing, this just requires to have good abrasion resistance on the mechanized equipment surface of bearing than under the conditions of work such as big load.
Built-up welding is simple because of technology, equipment investment is few, flexible operation, adaptation is wide is widely used, and is the common method of making or repairing wear parts at present.Welding rod, flux-cored electrode tubular electrode, flux-cored wire are the resurfacing welding materials of using always.Welding rod is coated coating and is made around core wire, have to use advantages such as flexible, easily manufactured.Therefore also many about the patent of welding rod, as Chinese patent CN86106019B " heat-resistant and wear-resistant solder stick for pile-up welding ", CN1116574A " a kind of rich chromium cast iron resurfacing welding material and technology ", CN1003430B " welding rod for non-preheating bead welding with superior hardness and anti-abrasiveness " etc.The alloy transfer efficiency of welding rod is low, the composition of deposited metal is stable inadequately and even, and the quantity of overlay cladding alloy is subjected to the restriction of process, only be suitable for deposited metal low, middle alloy, and because coating is non-conductive, be difficult to adopt the automatic welding process welding, more built-up welding more by hand make production efficiency low, the cost of labor height, poor working environment.
The advantage of flux-cored wire is to realize welding automatically easily.The patent of flux-cored welding wire for overlaying welding is more, as CN1415453A " a kind of built-up welding is with wrapping the core welding wire ", CN1775454A " high anticrack, wear-resistance, high-cr cast iron cored solder wire for huild-up welding " etc.The flux-cored wire diameter that built-up welding is used is generally less than 4mm, and how below 2.8mm, the loading of medicinal powder powder (filling rate of flux-cored wire) is restricted, and obtains relatively difficulty of the higher deposited metal of alloy content.And flux-cored wire manufacturing process complexity, price are more expensive.
The flux-cored electrode tubular electrode that uses mainly is the tungsten carbide flux-cored electrode tubular electrode at present, as the patent of CN1053134C " hardfacing flux-cored electrode tubular electrode ", CN1562550A " a kind of wear-resisting tubular tungsten carbide welding rod ", CN1211184C " tungsten carbide filler rod that contains cubic boron nitride particle ", CN1244431C tungsten carbide flux-cored electrode tubular electrodes such as " a kind of tubular tungsten carbide welding rods ".It is made up of the medicinal powder of inside and the steel pipe of coating medicinal powder, and its cross section is circular.Medicinal powder is mixed by cast tungsten carbide, cemented tungsten carbide, alloy powder, organic adhesive etc., and steel pipe is formed by cold-rolled low carbon steel band or nickel alloy strip or cobalt alloy roll coil of strip system.It can only use the built-up welding of oxy-acetylene overlaying method, can not adopt the higher arc surfacing of efficient.
Harsh day by day along with the component of machine applying working condition, as wearing and tearing, burn into high temperature etc., to low-cost, easy to use, production efficiency is high, the demand of the resurfacing welding material of excellent performance is also more urgent.
Summary of the invention
The tungsten carbide flux-cored electrode tubular electrode is only arranged, kind is few and can only uses the built-up welding of oxy-acetylene overlaying method, range of application limited at existing wear-resisting flux-cored electrode tubular electrode, cross section is circular, problems such as bead welding is narrow the invention provides a kind of novel flux-cored electrode tubular electrode and preparation method thereof.
Technical conceive of the present invention is: select metal and alloy powder and ore and chemical products powder, after mixing by design proportion, obtain the medicinal powder powder.Select commercially available mild steel steel band for use, utilize the professional production equipment and the prior art of core cabling wire for steel melting, along steel band length direction (vertically) it being rolled into cross section is U-shaped, in U-shaped is poor, add above-mentioned medicinal powder powder simultaneously, filling rate is 20%～65% (filling rate is the ratio of medicinal powder powder quality and medicinal powder powder and steel band quality sum), then U-lag is healed up, the seaming that forms as shown in Figure 1 connects, the medicinal powder powder is wrapped in the pipe of steel band formation, acquisition is surrounded by the steel pipe of medicinal powder powder, directly over above-mentioned seaming overlapping part placed or under, or in about vertical line inclined to one side 60 °, adopt conventional cold-rolling equipment and mould to divide passage rolling vertically downward then, gradually that the longitudinal cross-section of described steel pipe is rolling for long flat or rectangle like, cross section is of a size of: width 8mm～65mm, thickness 2mm～5mm, and alignment (shape of cross section is seen Fig. 2, Fig. 3), steel pipe after adopting conventional shearing equipment with above rolling alignment then is cut into the long segment of 300mm～500mm, and the one end is rolled into width is 8mm～68mm, thickness is 0.5mm～1.5mm, length is the flat of 8mm～20mm, to make things convenient for the electrode holders clamping.
Tube wire for overlaying welding of the present invention, make by mild steel steel band and the medicinal powder powder that is wrapped in it, it is characterized in that: described mild steel steel band is shaped as longitudinal cross-section and is long flat or rectangle like, is of a size of: width 8mm～65mm, the pipe of thickness 2mm～5mm, the steel band widthwise edge connects with the seaming form, and the junction is positioned on the face at place, a wherein long limit of transversal face length flat of pipe or rectangle like; Described medicinal powder powder evenly is filled in the above-mentioned pipe that is rolled into by steel band, medicinal powder powder granularity is-50 orders, the medicinal powder composition is in weight portion, comprise 40～70 parts of high carbon ferro-chromes, 5～30 parts of vanadium iron, 0～6 part of 75# ferrosilicon, 1～9 part of high carbon ferromanganese, 0～8 part of almag, 2～15 parts of ferro-borons, 1～6 part of ferrotianium, 2～8 parts of molybdenum-irons, 0～8 part of graphite, 0～5 part of fluorite and 0～6 part of potassium titanate; Described flux-cored electrode tubular electrode longitudinal length is 300mm～500mm, and the one end has width 8mm～68mm, thickness 0.5mm～1.5mm, and length is the flat zone of 8mm～20mm.
In the above-mentioned tube wire for overlaying welding: described mild steel steel band is preferentially selected the H08A steel band for use, and its chemical composition is: C is not more than 0.1%, Si is not more than 0.03%, Mn is 0.3%～0.55%, Cr is not more than 0.1%, Ni is not more than 0.25%, S is not more than 0.03%, P is not more than 0.03%, surplusly be Fe.
The width of above-mentioned seaming overlapping part is 1mm～5mm.
In the medicinal powder powder composition of above-mentioned tube wire for overlaying welding, the composition of high carbon ferro-chrome is that Cr is not less than 50%, C is 4～9%, and Si is not more than 5%, and surplus is Fe; The composition of vanadium iron is 50%V, 0.2%C, and 2%Si, 0.8%Al, surplus is Fe; The composition of 75# ferrosilicon is 74.0～80.0%Si, 0.1%C, and surplus is Fe; The composition of high carbon ferromanganese is that Mn is not less than 76%, C is not more than 7%, and Si is not more than 2.5%, and surplus is Fe; Almag is an aluminium: the magnesium mass ratio is 3: 2 a alloy powder; The composition of ferro-boron is 17～19%B, 0.5%C, and 4%Si, 0.5%Al, surplus is Fe; The composition of ferrotianium is 23～35%Ti, 8.5%Al, and 5%Si, 2.5%Mn, surplus is Fe; The composition of molybdenum-iron is 50%Mo, 3%Si, and surplus is Fe; The composition of graphite is 94～99%C; The composition of fluorite is CaF
2Greater than 96%; The composition of potassium titanate is TiO
2Be not less than 60%, K
2O is no more than 32%, and S and P are no more than 0.05%.
Allow to contain in the composition of the above medicinal powder powder and be difficult to the impurity that does not influence its performance removed in the process.It is as follows that the present invention adds the effect of each component of medicinal powder powder:
The effect of rich chromium cast iron is to the deposited metal transition alloy elements.
The effect of vanadium iron is to the deposited metal transition alloy elements, crystal grain thinning, Strengthening and Toughening deposited metal.
The effect of ferrosilicon is to deposited metal transition alloy elements, deoxidation.
The effect of high carbon ferromanganese is to the weld metal transition alloy elements, and deoxidation forms protective atmosphere.
The effect of almag is deoxidation, denitrogenation.
The effect of ferro-boron is to the weld metal transition alloy elements.
The effect of ferrotianium is deoxidation, denitrogenation, and crystal grain thinning improves toughness.
The effect of molybdenum-iron is to the weld metal transition alloy elements.
The effect of graphite is to deposited metal transition C, and deoxidation forms protective atmosphere in welding process.
The effect of fluorite is a character of adjusting slag in weld deposit process, improves appearance of weld.
The effect of potassium titanate is a stabilising arc, improves welding technological properties.
The preparation method of tube wire for overlaying welding of the present invention, step is:
(1) selecting thickness for use is 0.1mm～0.8mm, and width is the commercially available mild steel steel band of 20mm～130mm, utilizes existing core cabling wire for steel melting production equipment, and along steel band length direction (vertically) it being rolled into cross section is U-shaped;
(2) in above-mentioned U-shaped is poor, add the medicinal powder powder, filling rate is 20%～65% (filling rate is the ratio of medicinal powder powder quality and medicinal powder powder and steel band quality sum), wherein: described medicinal powder powder granularity is-50 orders, the powder composition is in weight portion, comprise 40～70 parts of high carbon ferro-chromes, 5～30 parts of vanadium iron, 0～6 part of 75# ferrosilicon, 1～9 part of high carbon ferromanganese, 0～8 part of almag, 2～15 parts of ferro-borons, 1～6 part of ferrotianium, 2～8 parts of molybdenum-irons, 0～8 part of graphite, 0～5 part of fluorite and 0～6 part of potassium titanate;
Above-mentioned medicinal powder proportioning is selected according to design, adopts conventional mixed powder machine to mix powder and uses after 10～30 minutes;
(3) will add cross section behind the powder is that the steel band widthwise edge of U-shaped connects with the seaming form, and the medicinal powder powder is wrapped in the steel band, forms the steel pipe that is surrounded by powder; The diameter of steel pipe is relevant with the width of selected steel band, and the width of seaming overlapping part is 1mm～5mm;
(4) above-mentioned seaming overlapping part is placed directly over or under, or in about vertical line inclined to one side 60 °, adopt conventional cold-rolling equipment and mould to divide passage rolling vertically downward then, gradually the described steel pipe that is surrounded by the medicinal powder powder of step (3) is flattened and alignment, longitudinal cross-section after the steel pipe moulding is long flat or rectangle like, width 8mm～65mm, thickness 2mm～5mm;
(5) the roll forming steel pipe with step (4) is cut into the long segment of 300mm～500mm with conventional shearing equipment, the one end being rolled into width then is 8mm～68mm, thickness is 0.5mm～1.5mm, and length is the flat of 8mm～20mm, promptly gets the flux-cored electrode tubular electrode that is used for built-up welding.
Wherein: the preferred H08A steel band of the described mild steel steel band of step (1).Directly over the described seaming overlapping part of step (4) preferably places, adopt conventional cold-rolling equipment and mould to divide passage rolling vertically downward then.
The using method of flux-cored electrode tubular electrode of the present invention is the same with conventional welding rod, can adopt the welding of AC welding set or DC welder, preferentially uses DC welder.
Applicating adn implementing of the present invention has following positive effect:
(1) flux-cored electrode tubular electrode of the present invention has overcome the single shortcoming of tungsten carbide flux-cored electrode tubular electrode composition, and the composition of deposited metal can increase its kind by changing the composition adjustment of flux-cored electrode tubular electrode medicinal powder, and range of application enlarges.
(2) compare with the tungsten carbide flux-cored electrode tubular electrode, flux-cored electrode tubular electrode bead-on-plate weld width of the present invention is big, moulding is attractive in appearance, built-up welding efficient is higher.
(3) compare with conventional welding rod, the crust conduction of flux-cored electrode tubular electrode of the present invention realizes automatic surfacing easily.
(4) flux-cored electrode tubular electrode bead-on-plate weld stable components, fusion penetration is shallow, dilution rate is low.
(5) production equipment of flux-cored electrode tubular electrode and technology are simple, and production cost is low, have overcome the drawback that filament alloy for surfacing welding wire is difficult to produce, and have overcome that the flux-cored wire investment of production equipment is big, production cost is high, expensive problem.
(6) make flux-cored electrode tubular electrode with powder filler material in seamless steel pipe and compare, flux-cored electrode tubular electrode composition of the present invention is even, production efficiency improves greatly, is fit to produce in enormous quantities.
Description of drawings
Fig. 1 shows and adds tubulose steel band longitudinal cross-section behind the medicinal powder powder and that connect with the seaming form.
Wherein: 1 medicinal powder powder, 2 are tubular steel band.
Fig. 2 shows that longitudinal cross-section is the flux-cored electrode tubular electrode of long flat.
Wherein: 1 medicinal powder powder, 2 steel bands.
Fig. 3 shows that longitudinal cross-section is the flux-cored electrode tubular electrode of rectangle like.
Wherein: 1 medicinal powder powder, 2 steel bands.
The specific embodiment
Embodiment 1:
(1) selecting width for use is that 39mm, thickness are the H08A cold-rolled strip of 0.3mm, utilizes existing core cabling wire for steel melting production equipment, and along steel band length direction (vertically) it being rolled into cross section is U-shaped;
(2) in above-mentioned U-shaped is poor, add the medicinal powder powder, filling rate is 48%, wherein: described medicinal powder powder granularity is-50 orders, medicinal powder powder composition comprises high carbon ferro-chrome 60, vanadium iron 8,75# ferrosilicon 5, high carbon ferromanganese 1, almag 5, ferro-boron 4, ferrotianium 5, molybdenum-iron 6, fluorite 2 and potassium titanate 3 in weight portion (kilogram);
Described powder adopts conventional mixed powder machine to mix powder and uses after 15 minutes;
(3) will add cross section behind the medicinal powder powder is that the steel band widthwise edge of U-shaped connects with the seaming form, and the medicinal powder powder is wrapped in the steel band, forms the steel pipe that is surrounded by the medicinal powder powder; The diameter of steel pipe is about 8mm, and the width of seaming overlapping part is 4.5mm;
(4) above-mentioned seaming overlapping part is placed directly over, adopt conventional cold-rolling equipment and mould to divide 4 passages rolling vertically downward then, gradually the described steel pipe that is surrounded by the medicinal powder powder of step (3) is flattened (drafts is followed successively by 2mm, 1.2mm, 0.8mm, 0.5mm) and alignment, longitudinal cross-section after the steel pipe moulding is long flat (see figure 2), width 12mm, thickness 3.5mm;
(5) the roll forming steel pipe with step (4) is cut into the long segment of 400mm with conventional shearing equipment, and the one end being rolled into width then is 16mm, and thickness is 1.5mm, and length is the flat of 12mm, promptly gets the flux-cored electrode tubular electrode that is used for built-up welding.
The flux-cored electrode tubular electrode that makes more than the use adopts the dc source manual build up welding, and welding current is selected 220A～240A for use, and the test plate (panel) material is Q345, is of a size of 200mm * 100mm * 20mm that single track single-layer surfacing, overlay cladding thickness are 4mm.The room temperature hardness of deposited metal is 55HRC.Deposited metal belongs to rich chromium cast iron class antifriction alloy, and it is mutually wear-resistant with boride to be distributed with carbide on matrix, is applicable to the abrasive wear of low shock loading operating mode.Make Wear-Resistant Compound Steel Plate with the open arc built-up welding on the Q345 substrate of above-mentioned medicine cored steel belt, wearing layer thickness is 4mm, substrate thickness is 20mm, make the room temperature abrading section that wear member is installed in the raw material subsidiary factory material conveying of certain steel mill by Wear-Resistant Compound Steel Plate, show good abrasion resistance, the life-span improves more than 3～4 times than steel-casting.
Embodiment 2:
(1) selecting width for use is that 130mm, thickness are the H08A cold-rolled strip of 0.4mm, utilizes existing core cabling wire for steel melting production equipment, and along steel band length direction (vertically) it being rolled into cross section is U-shaped;
(2) in above-mentioned U-shaped is poor, add the medicinal powder powder, filling rate is 55%, wherein: described medicinal powder powder granularity is-50 orders, and the powder composition comprises high carbon ferro-chrome 70, vanadium iron 10, high carbon ferromanganese 1, ferro-boron 12, ferrotianium 3, molybdenum-iron 3 and graphite 4 in weight portion (kilogram);
Described powder adopts conventional mixed powder machine to mix powder and uses after 20 minutes;
(3) will add cross section behind the medicinal powder powder is that the steel band widthwise edge of U-shaped connects with the seaming form, and the medicinal powder powder is wrapped in the steel band, forms the steel pipe that is surrounded by the medicinal powder powder; The diameter of steel pipe is about 35mm, and the width of seaming overlapping part is 5mm;
(4) above-mentioned seaming overlapping part is placed directly over, adopt conventional cold-rolling equipment and mould to divide 8 passages rolling vertically downward then, gradually the described steel pipe of step (3) is flattened (drafts is followed successively by 8mm, 7mm, 6mm, 5mm, 3mm, 1mm, 0.8mm, 0.7mm) and alignment, longitudinal cross-section after the steel pipe moulding is long flat (see figure 2), width 65mm, thickness 3.5mm;
(5) the roll forming steel pipe with step (4) is cut into the long segment of 450mm with conventional shearing equipment, and the one end being rolled into width then is 70mm, and thickness is 1.5mm, and length is the flat of 15mm, promptly gets the flux-cored electrode tubular electrode that is used for built-up welding.
The flux-cored electrode tubular electrode that makes more than the use adopts the dc source manual build up welding, and the electric current of built-up welding is selected 380A～400A for use, and the test plate (panel) material is Q345, is of a size of 300mm * 100mm * 20mm that single track single-layer surfacing, overlay cladding thickness are 4mm.The room temperature hardness of deposited metal is 60HRC.Deposited metal belongs to rich chromium cast iron class antifriction alloy, and it is mutually wear-resistant with boride to be distributed with carbide on matrix, is applicable to the abrasive wear of low shock loading operating mode.Make Wear-Resistant Compound Steel Plate with above-mentioned medicine cored steel belt submerged arc overlay welding on the Q345 substrate, wearing layer thickness is 4mm, substrate thickness is 20mm, Wear-Resistant Compound Steel Plate is processed into wear-resistant block is installed in the loader hopper bottom, be used for river sand exploitation, under the operating mode of the wet strong abrasive wear of river sand, wear resistence improves greatly, and the life-span was brought up to more than half a year by adopting in 2 months of the 25CrMnMo steel-casting.
Embodiment 3:
(1) selecting width for use is that 45mm, thickness are the Q195 cold-rolled strip of 0.3mm, utilizes existing core cabling wire for steel melting production equipment, and along steel band length direction (vertically) it being rolled into cross section is U-shaped;
(2) in above-mentioned U-shaped is poor, add the medicinal powder powder, filling rate is 50%, wherein: described medicinal powder powder granularity is-50 orders, medicinal powder powder composition comprises high carbon ferro-chrome 66, vanadium iron 6,75# ferrosilicon 3, high carbon ferromanganese 2, almag 5, ferro-boron 7, ferrotianium 4, molybdenum-iron 4, fluorite 2 and potassium titanate 2 in weight portion (kilogram);
Described medicinal powder powder adopts conventional mixed powder machine to mix powder and uses after 20 minutes;
(3) will add cross section behind the medicinal powder powder is that the steel band widthwise edge of U-shaped connects with the seaming form, and the medicinal powder powder is wrapped in the steel band, forms the steel pipe that is surrounded by powder; The diameter of steel pipe is about 10mm, and the width of stinging the H overlapping part is 4mm;
(4) above-mentioned seaming overlapping part is placed directly over, adopt conventional cold-rolling equipment and mould to divide 4 passages rolling vertically downward then, gradually the described steel pipe of step (3) is flattened (drafts is followed successively by 2.5mm, 2mm, 1.5mm, 1mm) and alignment, longitudinal cross-section after the steel pipe moulding is long flat (see figure 2), thickness 3mm, width 14mm;
(5) the roll forming steel pipe with step (4) is cut into the long segment of 450mm with conventional shearing equipment, and the one end being rolled into width then is 16mm, and thickness is 1.5mm, and length is the flat of 15mm, promptly gets the flux-cored electrode tubular electrode that is used for built-up welding.
The flux-cored electrode tubular electrode that makes more than the use adopts the dc source manual build up welding, and the electric current of built-up welding is selected 280A～310A for use, and the test plate (panel) material is Q345, is of a size of 300mm * 100mm * 20mm that single track single-layer surfacing, overlay cladding thickness are 4mm.The room temperature hardness of deposited metal is 60HRC.Deposited metal belongs to rich chromium cast iron class antifriction alloy, and it is mutually wear-resistant with boride to be distributed with carbide on matrix, is applicable to the abrasive wear of low shock loading operating mode.
Embodiment 4:
(1) selecting width for use is that 130mm, thickness are the H08A cold-rolled strip of 0.4mm, utilizes existing core cabling wire for steel melting production equipment, and along the steel band length direction it being rolled into cross section is U-shaped;
(2) in above-mentioned U-shaped is poor, add the medicinal powder powder, filling rate is 52%, wherein: described medicinal powder powder granularity is-50 orders, and medicinal powder powder composition comprises high carbon ferro-chrome 60, vanadium iron 9, high carbon ferromanganese 2, ferro-boron 10, ferrotianium 3, molybdenum-iron 5 and graphite 5 in weight portion (kilogram);
Above-mentioned medicinal powder powder adopts conventional mixed powder machine to mix powder and uses after 20 minutes;
(3) will add cross section behind the medicinal powder powder is that the steel band widthwise edge of U-shaped connects with the seaming form, and the medicinal powder powder is wrapped in the steel band, forms the steel pipe that is surrounded by the medicinal powder powder; The diameter of steel pipe is about 35mm, and the width of seaming overlapping part is 5mm;
(4) above-mentioned seaming overlapping part is placed under, adopt conventional cold-rolling equipment and mould to divide 8 passages rolling vertically downward then, gradually the described steel pipe of step (3) is flattened (drafts is followed successively by 8mm, 7mm, 6mm, 5mm, 3mm, 1.2mm, 1.0mm, 0.6mm) and alignment, longitudinal cross-section after the steel pipe moulding is that rectangle like (see figure 3), thickness are 3.2mm, and width is 55mm;
(5) the roll forming steel pipe with step (4) is cut into the long segment of 450mm with conventional shearing equipment, and the one end being rolled into width then is 58mm, and thickness is 1.5mm, and length is the flat of 15mm, promptly gets the flux-cored electrode tubular electrode that is used for built-up welding.
The flux-cored electrode tubular electrode that makes more than the use adopts the dc source manual build up welding, and the electric current of built-up welding is selected 420A～450A for use, and the test plate (panel) material is Q345, is of a size of 300mm * 100mm * 20mm that single track single-layer surfacing, overlay cladding thickness are 4mm.The room temperature hardness of deposited metal is 57HRC.Deposited metal belongs to rich chromium cast iron class antifriction alloy, and it is mutually wear-resistant with boride to be distributed with carbide on matrix, is applicable to the abrasive wear of low shock loading operating mode.
Embodiment 5:
(1) selecting width for use is that 45mm, thickness are the H08A cold-rolled strip of 0.3mm, utilizes existing core cabling wire for steel melting production equipment, and along steel band length direction (vertically) it being rolled into cross section is U-shaped;
(2) in above-mentioned U-shaped is poor, add the medicinal powder powder, filling rate is 53%, wherein: described medicinal powder powder granularity is-50 orders, the powder composition comprises high carbon ferro-chrome 66, vanadium iron 9,75# ferrosilicon 3, high carbon ferromanganese 2, almag 4, ferro-boron 8, ferrotianium 4, molybdenum-iron 5, fluorite 2 and potassium titanate 2 in weight portion (kilogram);
Described medicinal powder powder adopts conventional mixed powder machine to mix powder and uses after 15 minutes;
(3) will add cross section behind the medicinal powder powder is that the steel band widthwise edge of U-shaped connects with the seaming form, and powder is wrapped in the steel band, forms the steel pipe that is surrounded by the medicinal powder powder; The diameter of steel pipe is about 10mm, and the width of seaming overlapping part is 4mm;
(4) above-mentioned seaming overlapping part is placed directly over, adopt conventional cold-rolling equipment and mould to divide 4 passages rolling vertically downward then, gradually the described steel pipe of step (3) is flattened (drafts is followed successively by 2.5mm, 2mm, 1.5mm, 1mm) and alignment, longitudinal cross-section after the steel pipe moulding is rectangle like (see figure 3), thickness 3mm, width 13mm;
(5) the roll forming steel pipe with step (4) is cut into the long segment of 450mm with conventional shearing equipment, and the one end being rolled into width then is 15mm, and thickness is 1.2mm, and length is the flat of 15mm, promptly gets the flux-cored electrode tubular electrode that is used for built-up welding.
The flux-cored electrode tubular electrode that makes more than the use adopts the dc source manual build up welding, and the electric current of built-up welding is selected 280A～310A for use, and the test plate (panel) material is Q345, is of a size of 300mm * 100mm * 20mm that single track single-layer surfacing, overlay cladding thickness are 4mm.The room temperature hardness of deposited metal is 59HRC.Deposited metal belongs to rich chromium cast iron class antifriction alloy, and it is mutually wear-resistant with boride to be distributed with carbide on matrix, is applicable to the abrasive wear of low shock loading operating mode.
Claims (7)
1. tube wire for overlaying welding, make by mild steel steel band and the medicinal powder powder that is wrapped in it, it is characterized in that: described mild steel steel band is shaped as longitudinal cross-section and is long flat or rectangle like, is of a size of: width 8mm～65mm, the pipe of thickness 2mm～5mm, the steel band widthwise edge connects with the seaming form, and the junction is positioned on the face at place, a wherein long limit of transversal face length flat of pipe or rectangle like; Described medicinal powder powder evenly is filled in the above-mentioned pipe that is rolled into by steel band, medicinal powder powder granularity is-50 orders, the medicinal powder composition is in weight portion, comprise 40～70 parts of high carbon ferro-chromes, 5～30 parts of vanadium iron, 0～6 part of 75# ferrosilicon, 1～9 part of high carbon ferromanganese, 0～8 part of almag, 2～15 parts of ferro-borons, 1～6 part of ferrotianium, 2～8 parts of molybdenum-irons, 0～8 part of graphite, 0～5 part of fluorite and 0～6 part of potassium titanate; Described flux-cored electrode tubular electrode longitudinal length is 300mm～500mm, and the one end has width 8mm～68mm, thickness 0.5mm～1.5mm, and length is the flat zone of 8mm～20mm.
2. tube wire for overlaying welding as claimed in claim 1, it is characterized in that: described mild steel steel band is selected the H08A steel band for use, and its chemical composition is: C is not more than 0.1%, Si is not more than 0.03%, Mn is 0.3%～0.55%, Cr is not more than 0.1%, Ni is not more than 0.25%, S is not more than 0.03%, P is not more than 0.03%, surplusly be Fe.
3. tube wire for overlaying welding as claimed in claim 1 is characterized in that: the width of described seaming overlapping part is 1mm～5mm.
4. tube wire for overlaying welding as claimed in claim 1 is characterized in that: in the composition of described medicinal powder powder, the composition of high carbon ferro-chrome is that Cr is not less than 50%, and C is 4～9%, and Si is not more than 5%, and surplus is Fe; The composition of vanadium iron is 50%V, 0.2%C, and 2%Si, 0.8%Al, surplus is Fe; The composition of 75# ferrosilicon is 74.0～80.0%Si, 0.1%C, and surplus is Fe; The composition of high carbon ferromanganese is that Mn is not less than 76%, and C is not more than 7%, and Si is not more than 2.5%, and surplus is Fe; Almag is an aluminium: the magnesium mass ratio is 3: 2 a alloy powder; The composition of ferro-boron is 17～19%B, 0.5%C, and 4%Si, 0.5%Al, surplus is Fe; The composition of ferrotianium is 23～35%Ti, 8.5%Al, and 5%Si, 2.5%Mn, surplus is Fe; The composition of molybdenum-iron is 50%Mo, 3%Si, and surplus is Fe; The composition of graphite is 94～99%C; The composition of fluorite is CaF
2Greater than 96%; The composition of potassium titanate is TiO
2Be not less than 60%, K
2O is no more than 32%, and S and P are no more than 0.05%.
5. the preparation method of the described tube wire for overlaying welding of claim 1, step is:
(1) selecting thickness for use is 0.1mm～0.8mm, and width is the commercially available mild steel steel band of 20mm～130mm, utilizes conventional core cabling wire for steel melting production equipment, and along the steel band length direction it being rolled into cross section is U-shaped;
(2) in above-mentioned U-shaped is poor, add the medicinal powder powder, filling rate is 20%～65%, wherein: described medicinal powder powder granularity is-50 orders, the powder composition is in weight portion, comprise 40～70 parts of high carbon ferro-chromes, 5～30 parts of vanadium iron, 0～6 part of 75# ferrosilicon, 1～9 part of high carbon ferromanganese, 0～8 part of almag, 2～15 parts of ferro-borons, 1～6 part of ferrotianium, 2～8 parts of molybdenum-irons, 0～8 part of graphite, 0～5 part of fluorite and 0～6 part of potassium titanate;
Above-mentioned medicinal powder proportioning is selected according to design, adopts conventional mixed powder machine to mix powder and uses after 10～30 minutes;
(3) will add cross section behind the medicinal powder powder is that the steel band widthwise edge of U-shaped connects with the seaming form, and the medicinal powder powder is wrapped in the steel band, forms the steel pipe that is surrounded by powder; The diameter of steel pipe is relevant with the width of selected steel band, and the width of seaming overlapping part is 1mm～5mm;
(4) above-mentioned seaming overlapping part is placed directly over or under, or in about vertical line inclined to one side 60 °, adopt conventional cold-rolling equipment and mould to divide passage rolling vertically downward then, gradually the described steel pipe of step (3) is flattened and alignment, obtain longitudinal cross-section and be long flat or rectangle like, width 8mm～65mm, the flux-cored electrode tubular electrode of thickness 2mm～5mm;
(5) flux-cored electrode tubular electrode with step (4) is cut into the long segment of 300mm～500mm with conventional shearing equipment, and the one end being rolled into width then is 8mm～68mm, thickness 0.5mm～1.5mm, and length is the flat zone of 8mm～20mm, promptly gets the flux-cored electrode tubular electrode that is used for built-up welding.
6. as the preparation method of tube wire for overlaying welding as described in the claim 5, it is characterized in that: the described mild steel steel band of step (1) is selected the H08A steel band for use.
7. as the preparation method of tube wire for overlaying welding as described in the claim 5, it is characterized in that: directly over the described seaming overlapping part of step (4) places, adopt conventional cold-rolling equipment and mould to divide passage rolling vertically downward then.
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| CN2008101381147A CN101301709B (en) | 2008-07-01 | 2008-07-01 | Tube wire for overlaying welding and preparation thereof |
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| CN101301709B CN101301709B (en) | 2010-11-03 |
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