CN101306493A - Flux-cored steel belt for build-up welding and preparation method thereof - Google Patents
Flux-cored steel belt for build-up welding and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a resurfacing welding used drug cored steel strap and the preparation method. The steel strap is prepared from a mild steel strap and drug powder enwrapped therein, the shape of the steel strap is a tube with the longitudinal cross-section to be in a long and flat shape or in a similar rectangle shape, the longitudinal length can be determined randomly, and the transverse sides of the steel strap are connected in a seam manner or a related joint manner; the drug powder is uniformly filled in the tube rolled from the steel strap, wherein the particle diameter of the drug powder is smaller than 120 Mum, the components include (by weight) 45-70 parts of high carbon ferrochrome, 5-35 parts of ferrovanadium, 1-8 parts of No.75 ferrosilicon, 1-10 parts of high carbon ferromanganese, 2-16 parts of ferroboron, 1-8 parts of ferrotitanium, 0-5 parts of ferroniobium, 2-8 parts of ferromolybdenum, 0-10 parts of graphite, 0-5 parts of fluorite and 0-6 parts of potassium titanate. The drug cored steel strap adopting the invention can efficiently improve the abrasion resistance of the metal on the resurfacing welding layer and the stability of the electric arc, and can be coiled into coils, thereby being suitable for continuous automatic resurfacing welding.
Description
Technical field
The present invention relates to a kind of welding material, relate in particular to a kind of flux-cored steel belt for build-up welding and preparation method thereof.
Background technology
The machine components great majority are made with metal material, owing between the part or the relative motion between part and the material, can wear and tear.Along with development of modern industry, machine components often are in unusual complicated and exacting terms work down, a large amount of mechanized equipments is often scrapped because of wearing and tearing, and 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.
Adopting technology such as built-up welding, thermal spraying, vapour deposition, plating to prepare wear-resistant alloy layer in the metal surface is the common method of making or repairing wear parts at present.Built-up welding is simple because of technology, equipment investment is few, flexible operation, adaptation is wide is widely used.Manual electric arc pile up welding, oxy-acetylene flame built-up welding, automatic submerged-arc bead welding, Gas Shielded welding, plasma surfacing, ESW etc. are the processes of using always.Welding rod, solder flux, flux-cored wire, solid core welding wire, alloy powder block, the band utmost point etc. are the resurfacing welding materials of using always.Welding rod and solder flux have advantages such as use is flexible, easily manufactured, therefore also many about the patent of welding rod, solder flux, 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 surfacing weldings such as " welding rod for non-preheating bead welding with superior hardness and anti-abrasiveness "; And CN1238154C solder flux such as " a kind of sintering-flux for build-up welding of continuous casting roller and production methods thereof ".But the alloy transfer efficiency of welding rod, solder flux is low, the composition of deposited metal is stable inadequately and evenly, and the quantity of overlay cladding alloy is subjected to the restriction of process, only is suitable for deposited metal low, middle alloy.Flux-cored welding wire for overlaying welding such 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 shortcoming of flux-cored wire is that manufacturing process complexity, price are more expensive; Chinese patent CN85102440B " surfacing welding alloy powder agglomates " has proposed that alloy powder is prepared into alloy block and has been used for built-up welding, has improved the transfer coefficient of alloying element.Also have the alloy welding wire built-up welding in addition, the utilization rate of alloy welding wire transition alloy elements alloying element is higher, composition is also relatively more even though utilize, and alloy welding wire is difficult to make.
Advantages such as strip surfacing has the welding quality height, face of weld is smooth, presentation quality good, efficient, low cost, during strip surfacing, for the band utmost point that width is bigger magnetic control means need be installed on welding equipment,, keep arc stability so that the arc burning end face of the band utmost point can parallelly advance.The technology of strip surfacing material with submerged-arc welding process built-up welding railway locomotive, vehicle cartridge of using disclosed as Chinese patent CN1125700C " method of a kind of repair welding railway locomotive, vehicle cartridge ", this patent only relates to overlaying method, does not relate to composition and preparation method as the band utmost point material of electrode.The band stainless steel belt that very 90mm is wide, 0.5mm is thick of paper " the double-deck electroslag surfacing process experimental study of the 90mm broadband utmost point stainless steel " use that 2006 the 5th phases of pressure vessel magazine deliver.The band of paper " caster roll the is used the strip surfacing process practice " use that metallurgical 2002 the 4th phases of magazine of Jiangsu deliver is Cr13NiMo very, and thickness is 0.5mm, and width is 30mm and 50mm or the like.The used band of strip surfacing extremely all is formed from strip steel at present, owing to the band steel hardness that alloying element content is more is higher, make relatively difficulty, even can't make at all, make hardfacing with being with the of less types of the utmost point, greatly limited the application of strip surfacing, particularly the application aspect hardfacing.
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
At existing resurfacing welding material, problem such as particularly the manufacturing difficulty, the kind that exist of the build-up wear-resistant band utmost point is few, range of application is limited the present invention proposes a kind of novel flux-cored steel belt for build-up welding and preparation method thereof.
Technical conceive of the present invention is: select pulverous metal, alloy, ore and chemical products, after mixing by design proportion, obtain medicinal 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 above-mentioned U-shaped is poor, add above-mentioned medicinal powder simultaneously, filling rate is 20%～60% (filling rate is the ratio of medicinal powder quality and medicinal powder and steel band quality sum), then U-lag is healed up, the seaming that forms as shown in Figure 1 connects, perhaps overlap joint as shown in Figure 2 connects, medicinal powder is wrapped in the pipe that is formed by steel band, acquisition is surrounded by the steel pipe of medicinal powder, directly over the connecting portion of above-mentioned seaming or overlap joint 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 described steel pipe is flattened and alignment, obtaining longitudinal cross-section is long flat or rectangle like, thickness is 2mm～5mm, width is the medicine cored steel belt of 8～65mm, sees Fig. 3, Fig. 4, Fig. 5, Fig. 6.
Flux-cored steel belt for build-up welding of the present invention, form by mild steel steel band and the medicinal powder that is wrapped in it, it is characterized in that: described mild steel steel band is that thickness is 0.1mm～0.8mm, width is the commercially available mild steel steel band of 20mm～130mm, it is shaped as longitudinal cross-section is long flat or rectangle like, be of a size of: width 8mm～65mm, the pipe of thickness 2mm～5mm, its longitudinal length is arbitrarily determined, and can intercept or be wound in dish as required arbitrarily, the steel band widthwise edge connects with seaming form or joint form, the junction is positioned on the face at place, a wherein long limit of transversal face length flat of pipe or rectangle like, and the width of connecting portion is 1mm～5mm; Described medicinal powder evenly is filled in the above-mentioned pipe that is rolled into by steel band, the particle diameter of wherein said medicinal powder is less than 120 μ m, composition comprises 45～70 parts of high carbon ferro-chromes, 5～35 parts of vanadium iron, 1～8 part of 75# ferrosilicon, 1～10 part of high carbon ferromanganese, 2～10 parts of almags, 2～16 parts of ferro-borons, 1～8 part of ferrotianium, 0～5 part of ferro-niobium, 2～8 parts of molybdenum-irons, 0～10 part of graphite, 0～5 part of fluorite and 0～6 part of potassium titanate in weight portion.
In the above-mentioned flux-cored steel belt for build-up 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 longitudinal cross-section of above-mentioned medicine cored steel belt is long flat or rectangle like, is of a size of: width 8mm～65mm, thickness 2mm～5mm; Wherein: the width of seaming or overlap joint connecting portion is 1mm～5mm.
In the medicinal powder composition of above-mentioned flux-cored steel belt for build-up welding, 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 ferro-niobium is 70%Nb, 3%Al, and 5%Si, 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 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:
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 ferro-niobium is to the weld metal transition alloy elements.
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 flux-cored steel belt for build-up 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 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 medicinal powder, wherein: the particle diameter of described medicinal powder is less than 120 μ m, the medicinal powder composition comprises 45～70 parts of high carbon ferro-chromes, 5～35 parts of vanadium iron, 1～8 part of 75# ferrosilicon, 1～10 part of high carbon ferromanganese, 2～10 parts of almags, 2～16 parts of ferro-borons, 1～8 part of ferrotianium, 0～5 part of ferro-niobium, 2～8 parts of molybdenum-irons, 0～10 part of graphite, 0～5 part of fluorite and 0～6 part of potassium titanate in weight portion; The medicinal powder filling rate is 20%～60% (filling rate is the ratio of medicinal powder quality and medicinal powder and steel band quality sum);
Above-mentioned medicinal powder proportioning is selected according to design, adopts conventional mixed powder machine to mix powder and uses after 8～30 minutes;
(3) will add cross section behind the medicinal powder is that the steel band widthwise edge of U-shaped connects with seaming form or joint form, and medicinal powder package is wrapped in the steel band, forms the steel pipe that is surrounded by medicinal powder; The diameter of steel pipe is relevant with the width of selected steel band, and the width of seaming or overlap joint connecting portion is 1mm～5mm;
(4) connecting portion of above-mentioned seaming or overlap joint 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, the medicinal powder steel pipe flattened and alignment containing of gradually step (3) being made, and obtaining longitudinal cross-section is that 2mm～5mm, width are the medicine cored steel belt of 8mm～65mm for long flat or rectangle like, thickness;
(5) the medicine cored steel belt with step (4) roll forming intercepts or is wound in dish arbitrarily, promptly gets the medicine cored steel belt finished product that is used for strip surfacing.
Wherein: among the preparation method of above-mentioned flux-cored steel belt for build-up welding: the preferred H08A steel band of the described mild steel steel band of step (1); Step (2) medicinal powder composition preferably comprises 45～70 parts of high carbon ferro-chromes, 6～30 parts of vanadium iron, 1～6 part of 75# ferrosilicon, 2～9 parts of high carbon ferromanganeses, 2～8 parts of almags, 2～15 parts of ferro-borons, 1～6 part of ferrotianium, 1～5 part of ferro-niobium, 2～8 parts of molybdenum-irons, 1～8 part of graphite, 1～5 part of fluorite and 1～4 part of potassium titanate in weight portion.
The present invention utilizes the medicinal powder transition alloy elements in the medicine cored steel belt to improve the anti-wear performance of surfacing layer metal, utilize alloy powder, breeze, chemical products powder in the medicinal powder improve electric arc stability, improve processing performance and appearance of weld.
Medicine cored steel belt of the present invention can adopt built-up welding modes such as submerged arc strip surfacing or open arc strip surfacing or the strip surfacing of gas shield electric arc, electroslag strip surfacing.
The application of medicine cored steel belt of the present invention and enforcement have following positive effect:
(1) composition of deposited metal can increase the kind of medicine cored steel belt by changing the drug core component adjustment, and range of application enlarges.
(2) compare with resurfacing welding materials such as flux-cored wire, welding rods, the strip surfacing weld width is big, moulding is attractive in appearance, built-up welding efficient is higher, can realize automatic surfacing.
(3) medicine cored steel belt strip surfacing composition of weld line is stable, fusion penetration is shallow, dilution rate is low.
(4) production equipment of medicine cored steel belt 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.
(5) there is the people once to attempt powder filler material in seamless steel pipe, flatten the manufacturing medicine cored steel belt that is shaped then and be used for ESW, because long tube powder filler difficulty, and be difficult to guarantee that institute's powder of filling out is even, therefore be not suitable for making the medicine cored steel belt of random length, can only production length short.Medicine cored steel belt of the present invention can be a random length; and can be wound in dish; be suitable for continuous automatic surfacing, can use submerged arc strip surfacing or open arc strip surfacing or strip surfacing of gas shield electric arc or electroslag strip surfacing etc., the overlaying method that is suitable for increases.
Description of drawings
Fig. 1 shows and adds sausage charge cored steel belt cross section behind the medicinal powder and that connect with the seaming form.
Wherein: 1 medicinal powder, 2 are tubular steel band.
Fig. 2 shows and adds sausage charge cored steel belt cross section behind the medicinal powder and that connect with joint form.
Wherein: 1 medicinal powder, 2 are tubular steel band.
Fig. 3 shows that longitudinal cross-section is a medicine cored steel belt long flat and that connect with the seaming form.
Wherein: 1 medicinal powder, 2 steel bands.
Fig. 4 shows that longitudinal cross-section is a medicine cored steel belt long flat and that connect with joint form.
Wherein: 1 medicinal powder, 2 steel bands.
Fig. 5 shows that longitudinal cross-section is medicine cored steel belt rectangle like and that connect with the seaming form.
Wherein: 1 medicinal powder, 2 steel bands.
Fig. 6 shows that longitudinal cross-section is medicine cored steel belt rectangle like and that connect with joint form.
Wherein: 1 medicinal 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 medicinal powder, filling rate is 48%, wherein: the particle diameter of described medicinal powder is less than 120 μ m, the medicinal 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 and fluorite 2 in weight portion (kilogram);
Described medicinal powder adopts conventional mixed powder machine to mix powder and uses after 10 minutes;
(3) will add cross section behind the medicinal powder is that the steel band widthwise edge of U-shaped connects (see figure 1) with the seaming form, and medicinal powder package is wrapped in the steel band, forms the steel pipe that is surrounded by medicinal 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 of step (3) is flattened (drafts is followed successively by 2mm, 1.2mm, 0.8mm, 0.5mm) and alignment, obtaining longitudinal cross-section is long flat (see figure 3), thickness 3.5mm, the medicine cored steel belt of width 12mm;
(5) the medicine cored steel belt with step (4) roll forming intercepts or is wound in dish arbitrarily, promptly gets the medicine cored steel belt finished product that is used for strip surfacing.
The medicine cored steel belt that makes more than the use adopts the built-up welding of open arc welding technology, and welding current is selected 300A～310A 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 56HRC.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 steel enterprise sintering factory, raw material plant material conveying 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 medicinal powder, filling rate is 55%, wherein: the particle diameter of described medicinal powder is less than 120 μ m, the medicinal powder composition comprises high carbon ferro-chrome 70, vanadium iron 10,75# ferrosilicon 1, high carbon ferromanganese 1, almag 2, ferro-boron 12, ferrotianium 3, ferro-niobium 1, molybdenum-iron 3 and graphite 4 in weight portion (kilogram);
Described medicinal powder adopts conventional mixed powder machine to mix powder and uses after 20 minutes;
(3) will add cross section behind the medicinal powder is that the steel band widthwise edge of U-shaped connects (see figure 1) with the seaming form, and medicinal powder package is wrapped in the steel band, forms the steel pipe that is surrounded by medicinal 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, 1mm, 0.8mm, 0.7mm) and alignment, obtaining longitudinal cross-section is long flat (see figure 3), thickness 3.5mm, the medicine cored steel belt of width 65mm;
(5) the medicine cored steel belt with step (4) roll forming intercepts or is wound in dish arbitrarily, promptly gets the medicine cored steel belt finished product that is used for strip surfacing.
The medicine cored steel belt that makes more than the use adopts the submerged welding process built-up welding, and welding current is 500A～550A, voltage is 30V～38V, and built-up welding speed is 50cm/min, and solder flux is 260, 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 61HRC.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 medicinal powder, filling rate is 50%, wherein: the particle diameter of described medicinal powder is less than 120 μ m, the medicinal powder composition comprises high carbon ferro-chrome 65, vanadium iron 5,75# ferrosilicon 4, high carbon ferromanganese 2, almag 5, ferro-boron 6, ferrotianium 4, molybdenum-iron 5, fluorite 2 and potassium titanate 2 in weight portion (kilogram);
Described medicinal powder adopts conventional mixed powder machine to mix powder and uses after 15 minutes;
(3) will add cross section behind the medicinal powder is that the steel band widthwise edge of U-shaped connects (see figure 1) with the seaming form, and medicinal powder package is wrapped in the steel band, forms the steel pipe that is surrounded by medicinal 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, obtaining longitudinal cross-section is long flat (see figure 3), thickness 3mm, the medicine cored steel belt of width 14mm;
(5) the medicine cored steel belt with step (4) roll forming intercepts or is wound in dish arbitrarily, promptly gets the medicine cored steel belt finished product that is used for strip surfacing.
The medicine cored steel belt that makes more than the use adopts the built-up welding of open arc welding technology, and welding current is selected 320A～330A 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 58HRC.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 steel band length direction (vertically) it being rolled into cross section is U-shaped;
(2) in above-mentioned U-shaped is poor, add medicinal powder, filling rate is 55%, wherein: the particle diameter of described medicinal powder is less than 120 μ m, the medicinal powder composition comprises high carbon ferro-chrome 60, vanadium iron 9,75# ferrosilicon 1, high carbon ferromanganese 2, almag 2, ferro-boron 10, ferrotianium 3, molybdenum-iron 5 and graphite 5 in weight portion (kilogram);
Described medicinal powder adopts conventional mixed powder machine to mix powder and uses after 20 minutes;
(3) will add cross section behind the medicinal powder is that the steel band widthwise edge of U-shaped connects (see figure 1) with the seaming form, and medicinal powder package is wrapped in the steel band, forms the steel pipe that is surrounded by medicinal 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, obtaining longitudinal cross-section is rectangle like (see figure 5), thickness 3.2mm, the medicine cored steel belt of width 55mm;
(5) the medicine cored steel belt with step (4) roll forming intercepts or is wound in dish arbitrarily, promptly gets the medicine cored steel belt finished product that is used for strip surfacing.
The medicine cored steel belt that makes more than the use, adopt the submerged welding process built-up welding, the electric current of built-up welding is selected 500A～550A for use, voltage is 30V～38V, built-up welding speed is 50cm/min, and solder flux is 260, and the test plate (panel) material is Q345, be of a size of 300mm * 100mm * 20mm, 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.
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 the steel band length direction it being rolled into cross section is U-shaped;
(2) in above-mentioned U-shaped is poor, add medicinal powder, filling rate is 52%, wherein: the particle diameter of described medicinal powder is less than 120 μ m, the medicinal powder composition comprises high carbon ferro-chrome 65, vanadium iron 8,75# ferrosilicon 4, high carbon ferromanganese 2, almag 5, ferro-boron 8, ferrotianium 4, molybdenum-iron 6, fluorite 2 and potassium titanate 2 in weight portion (kilogram);
Described medicinal powder adopts conventional mixed powder machine to mix powder and uses after 15 minutes;
(3) will add cross section behind the medicinal powder is that the steel band widthwise edge of U-shaped connects (see figure 1) with the seaming form, and medicinal powder package is wrapped in the steel band, forms the steel pipe that is surrounded by medicinal 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, obtaining longitudinal cross-section is rectangle like (see figure 5), thickness 3mm, the medicine cored steel belt of width 13mm;
(5) the medicine cored steel belt with step (4) roll forming intercepts or is wound in dish arbitrarily, promptly gets the medicine cored steel belt finished product that is used for strip surfacing.
The medicine cored steel belt that makes more than the use adopts the built-up welding of open arc welding technology, and welding current is selected 320A～330A 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 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 6:
(1) selecting width for use is that 30mm, 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 medicinal powder, filling rate is 49%, wherein: the particle diameter of described medicinal powder is less than 120 μ m, the medicinal powder composition comprises high carbon ferro-chrome 62, vanadium iron 6,75# ferrosilicon 5, high carbon ferromanganese 1, almag 5, ferro-boron 5, ferrotianium 5, molybdenum-iron 5 and fluorite 2 in weight portion (kilogram);
Described medicinal powder adopts conventional mixed powder machine to mix powder and uses after 10 minutes;
(3) will add cross section behind medicinal powder and the steel wire is that the steel band widthwise edge of U-shaped connects (see figure 2) with joint form, and medicinal powder package is wrapped in the steel band, forms the steel pipe that is surrounded by medicinal powder and steel wire; The diameter of steel pipe is about 8mm, and the width of overlapping part is 4.5mm;
(4) above-mentioned 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 2mm, 1.2mm, 0.8mm, 0.5mm) and alignment, obtaining longitudinal cross-section is long flat (see figure 4), thickness 3.5mm, the medicine cored steel belt of width 12mm;
(5) the medicine cored steel belt with step (4) roll forming intercepts or is wound in dish arbitrarily, promptly gets the medicine cored steel belt finished product that is used for strip surfacing.
The medicine cored steel belt that makes more than the use adopts the built-up welding of open arc welding technology, and welding current is selected 290A～300A 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 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 7:
(1) selecting width for use is that 36mm, thickness are the H08A cold-rolled strip of 0.3mm, 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 medicinal powder, filling rate is 50%, wherein: the particle diameter of described medicinal powder is less than 120 μ m, the medicinal powder composition comprises high carbon ferro-chrome 66, vanadium iron 7,75# ferrosilicon 4, high carbon ferromanganese 2, almag 5, ferro-boron 8, ferrotianium 5, molybdenum-iron 6, fluorite 2 and potassium titanate 1 in weight portion (kilogram);
Described medicinal powder adopts conventional mixed powder machine to mix powder and uses after 15 minutes;
(3) will add cross section behind the medicinal powder is that the steel band widthwise edge of U-shaped connects (see figure 2) with joint form, and medicinal powder package is wrapped in the steel band, forms the steel pipe that is surrounded by medicinal powder; The diameter of steel pipe is about 10mm, and the width of seaming overlapping part is 4mm;
(4) above-mentioned 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, obtaining longitudinal cross-section is rectangle like (see figure 6), thickness 3mm, the medicine cored steel belt of width 13mm;
(5) the medicine cored steel belt with step (4) roll forming intercepts or is wound in dish arbitrarily, promptly gets the medicine cored steel belt finished product that is used for strip surfacing.
The medicine cored steel belt that makes more than the use adopts the built-up welding of open arc welding technology, and welding current is selected 300A～320A 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 61HRC.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 (6)
1. flux-cored steel belt for build-up welding, form by mild steel steel band and the medicinal powder that is wrapped in it, it is characterized in that: described mild steel steel band is that thickness is 0.1mm～0.8mm, width is the commercially available mild steel steel band of 20mm～130mm, it is shaped as longitudinal cross-section is long flat or rectangle like, be of a size of: width 8mm～65mm, the pipe of thickness 2mm～5mm, its longitudinal length is arbitrarily determined, and can intercept or be wound in dish as required arbitrarily, the steel band widthwise edge connects with seaming form or joint form, the junction is positioned on the face at place, a wherein long limit of transversal face length flat of pipe or rectangle like, and the width of connecting portion is 1mm～5mm; Described medicinal powder evenly is filled in the above-mentioned pipe that is rolled into by steel band, the particle diameter of wherein said medicinal powder is less than 120 μ m, composition comprises 45～70 parts of high carbon ferro-chromes, 5～35 parts of vanadium iron, 1～8 part of 75# ferrosilicon, 1～10 part of high carbon ferromanganese, 2～10 parts of almags, 2～16 parts of ferro-borons, 1～8 part of ferrotianium, 0～5 part of ferro-niobium, 2～8 parts of molybdenum-irons, 0～10 part of graphite, 0～5 part of fluorite and 0～6 part of potassium titanate in weight portion.
2. flux-cored steel belt for build-up 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. flux-cored steel belt for build-up welding as claimed in claim 1 is characterized in that: in the composition of described medicinal 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 ferro-niobium is 70%Nb, 3%Al, and 5%Si, 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%.
4. the preparation method of the described flux-cored steel belt for build-up 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 medicinal powder, wherein: the particle diameter of described medicinal powder is less than 120 μ m, the medicinal powder composition comprises 45～70 parts of high carbon ferro-chromes, 5～35 parts of vanadium iron, 1～8 part of 75# ferrosilicon, 1～10 part of high carbon ferromanganese, 2～10 parts of almags, 2～16 parts of ferro-borons, 1～8 part of ferrotianium, 0～5 part of ferro-niobium, 2～8 parts of molybdenum-irons, 0～10 part of graphite, 0～5 part of fluorite and 0～6 part of potassium titanate in weight portion; The medicinal powder filling rate is 20%～60%;
Above-mentioned medicinal powder proportioning is selected according to design, adopts conventional mixed powder machine to mix powder and uses after 8～30 minutes;
(3) will add cross section behind the medicinal powder is that the steel band widthwise edge of U-shaped connects with seaming form or joint form, and medicinal powder package is wrapped in the steel band, forms the steel pipe that is surrounded by medicinal powder; The diameter of steel pipe is relevant with the width of selected steel band, and the width of seaming or overlap joint connecting portion is 1mm～5mm;
(4) with above-mentioned seaming or the overlap joint connecting portion place 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, the medicinal powder steel pipe flattened and alignment containing of gradually step (3) being made, and obtaining longitudinal cross-section is that 2mm～5mm, width are the medicine cored steel belt of 8mm～65mm for long flat or rectangle like, thickness;
(5) the medicine cored steel belt with step (4) roll forming intercepts or is wound in dish arbitrarily, promptly gets the medicine cored steel belt finished product that is used for strip surfacing.
5. as the preparation method of flux-cored steel belt for build-up welding as described in the claim 4, it is characterized in that: the described mild steel steel band of step (1) is selected the H08A steel band for use.
6. as the preparation method of flux-cored steel belt for build-up welding as described in the claim 4, it is characterized in that: step (2) medicinal powder composition comprises 45～70 parts of high carbon ferro-chromes, 6～30 parts of vanadium iron, 1～6 part of 75# ferrosilicon, 2～9 parts of high carbon ferromanganeses, 2～8 parts of almags, 2～15 parts of ferro-borons, 1～6 part of ferrotianium, 1～5 part of ferro-niobium, 2～8 parts of molybdenum-irons, 1～8 part of graphite, 1～5 part of fluorite and 1～4 part of potassium titanate in weight portion.
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