CN105382378A - Surfacing welding method for abraded large roll shaft - Google Patents
Surfacing welding method for abraded large roll shaft Download PDFInfo
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- CN105382378A CN105382378A CN201510704092.6A CN201510704092A CN105382378A CN 105382378 A CN105382378 A CN 105382378A CN 201510704092 A CN201510704092 A CN 201510704092A CN 105382378 A CN105382378 A CN 105382378A
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- 238000003466 welding Methods 0.000 title claims abstract description 336
- 238000000034 method Methods 0.000 title claims abstract description 57
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- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 239000010953 base metal Substances 0.000 claims description 6
- 238000005097 cold rolling Methods 0.000 claims description 6
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- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- LNSPFAOULBTYBI-UHFFFAOYSA-N [O].C#C Chemical group [O].C#C LNSPFAOULBTYBI-UHFFFAOYSA-N 0.000 claims description 5
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Classifications
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- 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
- 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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- 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
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a surfacing welding method for an abraded large roll shaft. The surfacing welding method is characterized by comprising the following steps that 1, preweld material analysis is carried out, preweld cleaning is carried out on the roll shaft, and preweld preparation is carried out; 2, after preweld preparation is finished, preweld preheating is carried out; 3, after preweld preheating is finished, automatic submerged arc welding is adopted for surfacing welding; 4, after surfacing welding is finished, welding slag is broken down, and postweld heat treatment is carried out; and 5, after heat treatment is finished, finally machining is carried out according to requirements. After the surfacing welding method is adopted, surfacing welding layer defects at the surfacing welding position are few, and the forming quality of a welding channel is good; the hardness of the surfacing welding position is distributed in a ladder manner from low to high from inside to outside, and the hardness of the outermost layer even ranges from 55 HRC to 60 HRC; the impact toughness and strength of the surfacing welding position are equal to those of the roll shaft and even exceed those of a base material by 1-2 times; the capacity for resisting spalling fatigue damage is high, the surfacing welding effect is remarkable, and the welding quality requirement can be completely met; and the whole surfacing welding process is easy to master and control, and good economical efficiency is achieved.
Description
Technical field
The present invention relates to a kind of welding procedure, a kind of automatical hidden arc overlay welding method particularly after large-scale roll shaft wearing and tearing.
Background technology
Damage phenomenon that large-scale roll shaft in use can cause greatly roll to occur wearing and tearing because local strength's change, collapses hole, crackle appears in roller surface, fracture of roller, roll hardness are uneven etc., thus cause roll to be scrapped, particularly in cold rolling mill and continuous casting steel mill, often there is this type of phenomenon.Because roll shaft all adopts special steel material, and special steel material is all through forging and complicated heat treatment process manufacture forms, price is higher, roll shaft waste in annual steel mill is huge, scrap because not reaching original performance after can not repairing or repair again afterwards, this causes great economic loss to China's metallurgy industry.
Summary of the invention
Goal of the invention of the present invention is: for above-mentioned Problems existing, overlaying method after a kind of large-scale roll shaft wearing and tearing is provided, this technique passes through improvements over the prior art, overcome the deficiencies in the prior art, make the roll shaft after final reparation can meet the performance of new roll shaft completely, even exceed 1 ~ 2 times of new roll shaft performance.
To achieve these goals, the technical solution used in the present invention is as follows: the overlaying method after a kind of large-scale roll shaft wearing and tearing, comprises the following steps:
Material analysis before step 1, weldering, roll shaft carries out preweld cleaning, welds prepares;
After step 2, welds prepares, carry out weld preheating;
After step 3, weld preheating terminate, automatic submerged arc welding is adopted to carry out built-up welding;
After step 4, built-up welding, abolish welding slag, carry out post weld heat treatment;
After step 5, heat treatment, finally carry out machining as requested.
Further, the concrete technology of described step 1 is: first record the original size of roll shaft and original complexion, then roll shaft carries out turning removing heat fatigue layer, carry out carrying out flaw detection process afterwards and guarantee the thorough Ex-all of fatigue crack, and then remove greasy dirt and the impurity on roll shaft surface, polish to base metals, polishing thickness is 3 ~ 4mm, make portion faces to be welded totally bright and clean with sander polishing, now record is carried out to roll surface size.
Further, the concrete technology of described step 2 is: after welds prepares, adopt oxygen-acetylene torch that whole roll shaft is heated to 250 ~ 300 DEG C comprehensively, programming rate is not more than 20 DEG C ∕ s, temperature retention time is pressed the every 100mm of roll shaft length and is calculated for mono-hour, welding wire and solder flux are dried to 300 ~ 350 DEG C, insulation 2h.
Further, the concrete technology of described step 3 is: after weld preheating terminates, roll shaft is lifted on rotating support, the two ends of first built-up welding roll shaft, suitable welding wire and solder flux is selected according to roll shaft material, then ground floor welding is carried out, ground floor gage of wire used is 2.0mm, adopt DC reverse connection, welding current is 190 ~ 220A, weldingvoltage is 30 ~ 33V, speed of welding is 210 ~ 230mm/min, electrode extension is 23 ~ 27mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, built-up welding from left to right, built-up welding thickness is 2.5mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete ground floor built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, carry out second layer welding, second layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 220 ~ 280A, weldingvoltage is 28 ~ 31V, speed of welding is 240 ~ 280mm/min, electrode extension is 23 ~ 27mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, right-to-left built-up welding, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete second layer built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, carry out third layer welding, third layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 220 ~ 280A, weldingvoltage is 28 ~ 31V, speed of welding is 240 ~ 280mm/min, electrode extension is 23 ~ 27mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, built-up welding from left to right, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete third layer built-up welding, like this, later each layer by that analogy, finally stays the weldering meat height of 2 ~ 3mm in the plane of roll shaft, then continues to adopt above-mentioned steps roll shaft mid portion to carry out built-up welding, until built-up welding is complete.
Further, the concrete technology of described step 4 is: after welding, abolish welding slag, roll shaft mineral wool is wrapped up insulation 30min after again slow cooling to room temperature, reinstall after slow cooling terminates in heating furnace and carry out temper, be warming up to 500 DEG C, programming rate keeps 100 DEG C/h, come out of the stove when cooling to 150 DEG C with the furnace after insulation 5h, cool to room temperature.
Further, the concrete technology of described step 5 is: after heat treatment, carries out carrying out flaw detection with supersonic detector to surfacing part, if defectiveness, need a defect turning to fall built-up welding again, if do not have defect, this can carry out machining according to drawing.
Further, if roll shaft is cold rolling roll shaft, the chemical constituent of welding wire used is (% calculates by weight percentage): carbon is 0.17 ~ 0.23%, manganese is 1.2 ~ 1.6%, and chromium is 4.8 ~ 6.0%, and tungsten is 0.8 ~ 1.7%, molybdenum is 0.6 ~ 1.3%, other constituent content is 0.8 ~ 2.0%, and surplus is iron, and selected solder flux is HJ107 solder flux.
The invention still further relates to a kind of surfacing equipment for repairing after large-scale roll shaft wearing and tearing, comprise main equipment, rail plate, mechanical arm, support, described rail plate is connected with slide block, described mechanical arm comprises slide block, connecting rod, with rotation boss, described slide block lower end is fixed with connecting rod, connecting rod on described mechanical arm has 3 sections, one section, upper end is fixedly connected with slide block, lower end is connected with rotation boss, connecting rod and link joint feature divide and can freely rotate, described rotation boss and lower end link joint feature divide and can freely rotate, rotate on boss and be installed with welding gun, ultrasonic fault detector probe and oxy-acetylene rifle head, described welding gun is connected with wire feeder, send solder flux mechanism, cooling water system is unified control line, main equipment controls welding gun work by control line, described ultrasonic fault detector probe is electroacoustic transducer, electroacoustic transducer is converted to electric pulse by returning the sound wave come, then by the circuit transmission on electroacoustic transducer on the display of main equipment, described oxy-acetylene rifle head is connected to oxygen conveying pipe, acetylene conveying pipe and control circuit, and main equipment controls the work of oxy-acetylene rifle head by control circuit.
Further, the vertical direction of described rail plate is also provided with slide block, slide block is fixedly connected with connecting rod, and connecting rod has four sections, and the connecting rod of upper end is fixedly connected with slide block, the connecting rod of lower end is connected with T-shaped bar, the part connected between each connecting rod is free to rotate, and the part that described T-shaped bar is connected with connecting rod is free to rotate, and T-shaped bar upper end is fixedly connected with grinding wheel, lower end is fixedly connected with tup, and grinding wheel and tup realize position by the part rotation connected between T-shaped bar and connecting rod and exchange up and down.
Further, described support is a pair, and is fixedly mounted on the right and left of support, and every limit support is connected with rotating transmitting gear, the axle head of the endoporus stationary roller shaft of described transmitting gear, and when transmitting gear rotates, roll shaft also and then rotates.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, overlay cladding defect is few, and figuration of bead quality is good.
Due to employing is automatic submerged-arc bead welding, in welding process, because slag has completely cut off air, in weld metal, nitrogen content, oxygen content reduce greatly, then due to the insulation effect of slag, make molten bath life period longer, liquid metal compares fully with the metallurgical reaction of slag, gas, adds that welding parameter can keep stable by automatically regulating, cause the chemical composition of overlay cladding and Performance comparision even, overlay surface is smooth, better mechanical property; In overlaying method, optimum configurations is most important, and optimum configurations is bad, not only affects figuration of bead quality, also can affect whole overlaying method, causes welding unsuccessfully.Technique speed of welding of the present invention is selected appropriate, and it is suitable that welding current and weldingvoltage control, therefore figuration of bead quality is good, and surfacing part is pore-free almost, is mingled with, the defects such as shrinkage cavity, overlaps 1/3 between per pass welding bead, ensure that to weld problem appearance less without solder skip.
2, surfacing part mechanical property is good, with mother metal in conjunction with excellent.
In weld deposit process, owing to being first roll shaft preheating, built-up welding again, such stacking coating metal dilution rate is low, and the carbide alloy in overlay cladding and the near interface of base metals exist the counterdiffusion of element phase, forms new thing phase, its interface is formed as the mixed interface at diffused interface and compound type interface, add bond strength, welding bead difficult drop-off, associativity is strong; By the heat treatment of postwelding to surfacing part, the hardness distribution in staged from low to high from inside to outside of surfacing part, outermost layer hardness is greater than 45HRC, even reach 55 ~ 60HRC, its impact flexibility and intensity reach suitable with roll shaft, and even exceed mother metal 1 ~ 2 times, the ability of antifatigue pull out type fracture is strong, built-up welding Be very effective, can meet welding quality requirement completely.
3, weld deposit process is easy to grasp, manipulate, and saves cost, good economy performance.
Because weld deposit process is increased by the method for welding and recovers the size of roll shaft, and make roll shaft surface obtain the overlay cladding suitable with roll shaft performance, for the personnel that skillfully can grasp solder technology, operation easier is little, weld deposit process is easy to control, workable; In weld deposit process, be first built-up welding roll shaft two ends, rear built-up welding roll shaft mid portion, guarantees built-up welding effect further, finally reach saving cost, extend the object in roll shaft service life, the labour intensity of manual welding operation can also be alleviated simultaneously, prevent arc light radiation to the injury of welder, reduce the splashing of metal, pernicious gas is also few, thus improves working condition, good economy performance.
4, mechanization degree is high, functional diversities, operating efficiency is high.
Surfacing equipment of the present invention, on the basis based on existing surfacing equipment, in order to improve mechanization degree, practical function variation, originally the sander, supersonic detector, tup and the oxy-acetylene heating gun that are used alone are arranged on surfacing equipment, by control system, it is manipulated, reach a tractor serves several purposes, the effect that efficiency improves, extend the function of surfacing equipment, mechanization degree improves, and economy is obvious, and market potential is large.
Accompanying drawing explanation
Fig. 1 is overlaying method schematic diagram of the present invention;
Fig. 2 is overlaying method sequential schematic of the present invention;
Fig. 3 is the partial schematic diagram of built-up welder of the present invention.
Mark in figure: 1 is roll shaft, and 2 is welding wire, and α is top rake, L is the distance of welding wire apart from roll shaft peak, 3 is welding bead, and 4 is lap between welding bead, and 5 is the built-up welding of roll shaft end, and 6 is the built-up welding of roll shaft mid portion, 7 is rail plate, and 8 is slide block, and 9 is support, and 10 is transmitting gear, 11 is connecting rod, and 12 is grinding wheel, and 13 is tup, and 14 is welding gun, 15 is ultrasonic fault detector probe, and 16 is oxy-acetylene rifle head, and 17 for rotating boss, 18 main equipments, 19 is T-shaped bar, and 20 is mechanical arm.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make the object of invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
One embodiment of the present of invention, as shown in Figure 1,1 is roll shaft, 2 is welding wire, α is top rake, and angular dimension is 6 °, and L is the distance of welding wire apart from roll shaft peak, size is 25mm, 3 is welding bead, and 4 is lap between welding bead, and 5 is the built-up welding of roll shaft end, 6 is the built-up welding of roll shaft mid portion, and its overlaying method step is:
Step 1, the original size first recording roll shaft 1 and original complexion, object is in follow-up weld deposit process targeted, makes it to repair impaired roll shaft 1 completely.Then the material of the roll shaft 1 that need repair is determined, such as, in order to selected desired solder wire material and corresponding solder flux, if roll shaft 1 is chrome molybdenum series cold rolling support roller axle, the chemical constituent of welding wire used is (% calculates by weight percentage): carbon is 0.17%, manganese is 1.6%, and chromium is 6.0%, and tungsten is 1.7%, molybdenum is 1.3%, other constituent content is 2.0%, and surplus is iron, and selected solder flux is HJ107 solder flux.Then roll shaft 1 carries out turning to remove heat fatigue layer, carry out carrying out flaw detection process afterwards to guarantee the thorough Ex-all of fatigue crack, and then remove greasy dirt and the impurity on roll shaft 1 surface, polishing is to base metals, polishing thickness is 3mm, make portion faces to be welded totally bright and clean with sander polishing, now record is carried out to roll surface size, to determine overlay cladding thickness, material consumption, follow-up overlaying method flow process.
After step 2, welds prepares, adopt oxygen-acetylene torch that whole roll shaft is heated to 250 DEG C comprehensively, programming rate is not more than 20 DEG C ∕ s, temperature retention time is pressed the every 100mm of roll shaft length and is calculated for mono-hour, welding wire and solder flux are dried to 300 DEG C, and insulation 2h, then puts into heat-preservation cylinder, be convenient to the starting the arc, ready access upon use.
Step 3, after weld preheating terminates, roll shaft 1 is lifted on rotating support, the two ends of first built-up welding roll shaft 1, suitable welding wire 2 and solder flux is selected according to roll shaft material, then ground floor welding is carried out, ground floor welding wire 2 used diameter is 2.0mm, adopt DC reverse connection, welding current is 190A, weldingvoltage is 30V, speed of welding is 210mm/min, electrode extension is 23mm, welding wire top rake α is 6 °, built-up welding from left to right, as shown in Figure 1, amount of lap between every one welding bead 3 is 1/3, i.e. lap 4 between welding bead in Fig. 1, built-up welding thickness is 2.5mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete ground floor built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, carry out second layer welding, second layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 220A, weldingvoltage is 28V, speed of welding is 240mm/min, electrode extension is 23mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, right-to-left built-up welding, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete second layer built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, then third layer welding is carried out, third layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 220A, weldingvoltage is 28V, speed of welding is 240mm/min, electrode extension is 23mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, built-up welding from left to right, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete third layer built-up welding, like this, later each layer by that analogy, finally stays the weldering meat height of 2mm, is convenient to machining below in the plane of roll shaft, ensures roll shaft dimensional accuracy, then continue to adopt above-mentioned steps roll shaft mid portion to carry out built-up welding, until built-up welding is complete, as shown in Figure 1, first on roll shaft 1, complete roll shaft end built-up welding 5, last completing the built-up welding 6 of roll shaft mid portion, in whole weld deposit process, strictly must control interlayer temperature, in strict accordance with set parameter manipulation, such guarantee produces a desired effect.
After step 4, welding, abolish welding slag, after roll shaft mineral wool being wrapped up insulation 30min, slow cooling, to room temperature, reinstalls after slow cooling terminates in heating furnace and carries out temper again, is warming up to 500 DEG C, programming rate keeps 100 DEG C/h, come out of the stove when cooling to 150 DEG C with the furnace after insulation 5h, last cool to room temperature, can eliminate the internal stress in roll shaft like this, stablize the structure organization of surfacing part, improve the comprehensive mechanical property of matrix and overlay cladding.
After step 5, heat treatment, carry out carrying out flaw detection with supersonic detector to surfacing part, if defectiveness, need a defect turning to fall built-up welding again, if do not have defect, this can carry out machining according to drawing.
After implementing according to above overlaying method, the surfacing part surfacing layer quality of the roll shaft obtained is good, pore, be mingled with, it is little that the defects such as shrinkage cavity produce probability, and in weld metal, nitrogen content, oxygen content reduce greatly, and liquid metal is more abundant with the metallurgical reaction of slag, gas, keep stable by the automatic adjustment of welding parameters, cause the chemical composition of overlay cladding and Performance comparision even, overlay surface is smooth, better mechanical property, the hardness distribution in staged from low to high from inside to outside of surfacing part, outermost layer hardness is greater than 45HRC, even reach 55 ~ 60HRC, its impact flexibility and intensity reach suitable with roll shaft, even exceed mother metal 1 ~ 2 times, the ability of antifatigue pull out type fracture is strong, built-up welding Be very effective, welding quality requirement can be met completely, be specially adapted to the built-up welding of cylindrical and large flat work pieces, but be not suitable for built-up welding finding.
Second embodiment of the present invention, its overlaying method step is:
Step 1, the original size first recording roll shaft 1 and original complexion, object is in follow-up weld deposit process targeted, makes it to repair impaired roll shaft 1 completely.Then the material of the roll shaft 1 that need repair is determined, such as, in order to selected desired solder wire material and corresponding solder flux, if roll shaft 1 is chrome molybdenum series cold rolling support roller axle, the chemical constituent of welding wire used is (% calculates by weight percentage): carbon is 0.23%, manganese is 1.2%, and chromium is 4.8%, and tungsten is 0.8%, molybdenum is 0.6%, other constituent content is 0.8%, and surplus is iron, and selected solder flux is HJ107 solder flux.Then roll shaft 1 carries out turning to remove heat fatigue layer, carry out carrying out flaw detection process afterwards to guarantee the thorough Ex-all of fatigue crack, and then remove greasy dirt and the impurity on roll shaft 1 surface, polishing is to base metals, polishing thickness is 3.5mm, make portion faces to be welded totally bright and clean with sander polishing, now record is carried out to roll surface size, to determine overlay cladding thickness, material consumption, follow-up overlaying method flow process.
After step 2, welds prepares, adopt oxygen-acetylene torch that whole roll shaft is heated to 250 DEG C comprehensively, programming rate is not more than 20 DEG C ∕ s, temperature retention time is pressed the every 100mm of roll shaft length and is calculated for mono-hour, welding wire and solder flux are dried to 250 DEG C, and insulation 2h, then puts into heat-preservation cylinder, be convenient to the starting the arc, ready access upon use.
Step 3, after weld preheating terminates, roll shaft 1 is lifted on rotating support, the two ends of first built-up welding roll shaft 1, suitable welding wire 2 and solder flux is selected according to roll shaft material, then ground floor welding is carried out, ground floor welding wire 2 used diameter is 2.0mm, adopt DC reverse connection, welding current is 220A, weldingvoltage is 33V, speed of welding is 230mm/min, electrode extension is 27mm, welding wire top rake α is 6 °, built-up welding from left to right, as shown in Figure 1, amount of lap between every one welding bead 3 is 1/3, i.e. lap 4 between welding bead in Fig. 1, built-up welding thickness is 2.5mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete ground floor built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, carry out second layer welding, second layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 280A, weldingvoltage is 31V, speed of welding is 280mm/min, electrode extension is 27mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, right-to-left built-up welding, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete second layer built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, then third layer welding is carried out, third layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 280A, weldingvoltage is 31V, speed of welding is 280mm/min, electrode extension is 27mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, built-up welding from left to right, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete third layer built-up welding, like this, later each layer by that analogy, finally stays the weldering meat height of 2.5mm, is convenient to machining below in the plane of roll shaft, ensures roll shaft dimensional accuracy, then continue to adopt above-mentioned steps roll shaft mid portion to carry out built-up welding, until built-up welding is complete, as shown in Figure 1, first on roll shaft 1, complete roll shaft end built-up welding 5, last completing the built-up welding 6 of roll shaft mid portion, in whole weld deposit process, strictly must control interlayer temperature, in strict accordance with set parameter manipulation, such guarantee produces a desired effect.
After step 4, welding, abolish welding slag, after roll shaft mineral wool being wrapped up insulation 30min, slow cooling, to room temperature, reinstalls after slow cooling terminates in heating furnace and carries out temper again, is warming up to 500 DEG C, programming rate keeps 100 DEG C/h, come out of the stove when cooling to 150 DEG C with the furnace after insulation 5h, last cool to room temperature, can eliminate the internal stress in roll shaft like this, stablize the structure organization of surfacing part, improve the comprehensive mechanical property of matrix and overlay cladding.
After step 5, heat treatment, carry out carrying out flaw detection with supersonic detector to surfacing part, if defectiveness, need a defect turning to fall built-up welding again, if do not have defect, this can carry out machining according to drawing.
After implementing according to above overlaying method, the surfacing part surfacing layer quality of the roll shaft obtained is good, pore, be mingled with, it is little that the defects such as shrinkage cavity produce probability, and in weld metal, nitrogen content, oxygen content reduce greatly, and liquid metal is more abundant with the metallurgical reaction of slag, gas, keep stable by the automatic adjustment of welding parameters, cause the chemical composition of overlay cladding and Performance comparision even, overlay surface is smooth, better mechanical property, the hardness distribution in staged from low to high from inside to outside of surfacing part, outermost layer hardness is greater than 45HRC, even reach 55 ~ 60HRC, its impact flexibility and intensity reach suitable with roll shaft, even exceed mother metal 1 ~ 2 times, the ability of antifatigue pull out type fracture is strong, built-up welding Be very effective, welding quality requirement can be met completely, be specially adapted to the built-up welding of cylindrical and large flat work pieces, but be not suitable for built-up welding finding.
3rd embodiment of the present invention, its overlaying method step is:
Step 1, the original size first recording roll shaft 1 and original complexion, object is in follow-up weld deposit process targeted, makes it to repair impaired roll shaft 1 completely.Then the material of the roll shaft 1 that need repair is determined, such as, in order to selected desired solder wire material and corresponding solder flux, if roll shaft 1 is chrome molybdenum series cold rolling support roller axle, the chemical constituent of welding wire used is (% calculates by weight percentage): carbon is 0.21%, manganese is 1.4%, and chromium is 5.3%, and tungsten is 1.3%, molybdenum is 0.8%, other constituent content is 1.2%, and surplus is iron, and selected solder flux is HJ107 solder flux.Then roll shaft 1 carries out turning to remove heat fatigue layer, carry out carrying out flaw detection process afterwards to guarantee the thorough Ex-all of fatigue crack, and then remove greasy dirt and the impurity on roll shaft 1 surface, polishing is to base metals, polishing thickness is 4mm, make portion faces to be welded totally bright and clean with sander polishing, now record is carried out to roll surface size, to determine overlay cladding thickness, material consumption, follow-up overlaying method flow process.
After step 2, welds prepares, adopt oxygen-acetylene torch that whole roll shaft is heated to 250 DEG C comprehensively, programming rate is not more than 20 DEG C ∕ s, temperature retention time is pressed the every 100mm of roll shaft length and is calculated for mono-hour, welding wire and solder flux are dried to 270 DEG C, and insulation 2h, then puts into heat-preservation cylinder, be convenient to the starting the arc, ready access upon use.
Step 3, after weld preheating terminates, roll shaft 1 is lifted on rotating support, the two ends of first built-up welding roll shaft 1, suitable welding wire 2 and solder flux is selected according to roll shaft material, then ground floor welding is carried out, ground floor welding wire 2 used diameter is 2.0mm, adopt DC reverse connection, welding current is 200A, weldingvoltage is 31V, speed of welding is 220mm/min, electrode extension is 25mm, welding wire top rake α is 6 °, built-up welding from left to right, as shown in Figure 1, amount of lap between every one welding bead 3 is 1/3, i.e. lap 4 between welding bead in Fig. 1, built-up welding thickness is 2.5mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete ground floor built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, carry out second layer welding, second layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 250A, weldingvoltage is 30V, speed of welding is 260mm/min, electrode extension is 25mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, right-to-left built-up welding, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete second layer built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, then third layer welding is carried out, third layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 250A, weldingvoltage is 30V, speed of welding is 260mm/min, electrode extension is 25mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, built-up welding from left to right, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete third layer built-up welding, like this, later each layer by that analogy, finally stays the weldering meat height of 3mm, is convenient to machining below in the plane of roll shaft, ensures roll shaft dimensional accuracy, then continue to adopt above-mentioned steps roll shaft mid portion to carry out built-up welding, until built-up welding is complete, as shown in Figure 1, first on roll shaft 1, complete roll shaft end built-up welding 5, last completing the built-up welding 6 of roll shaft mid portion, in whole weld deposit process, strictly must control interlayer temperature, in strict accordance with set parameter manipulation, such guarantee produces a desired effect.
After step 4, welding, abolish welding slag, after roll shaft mineral wool being wrapped up insulation 30min, slow cooling, to room temperature, reinstalls after slow cooling terminates in heating furnace and carries out temper again, is warming up to 500 DEG C, programming rate keeps 100 DEG C/h, come out of the stove when cooling to 150 DEG C with the furnace after insulation 5h, last cool to room temperature, can eliminate the internal stress in roll shaft like this, stablize the structure organization of surfacing part, improve the comprehensive mechanical property of matrix and overlay cladding.
After step 5, heat treatment, carry out carrying out flaw detection with supersonic detector to surfacing part, if defectiveness, need a defect turning to fall built-up welding again, if do not have defect, this can carry out machining according to drawing.
After implementing according to above overlaying method, the surfacing part surfacing layer quality of the roll shaft obtained is good, pore, be mingled with, it is little that the defects such as shrinkage cavity produce probability, and in weld metal, nitrogen content, oxygen content reduce greatly, and liquid metal is more abundant with the metallurgical reaction of slag, gas, keep stable by the automatic adjustment of welding parameters, cause the chemical composition of overlay cladding and Performance comparision even, overlay surface is smooth, better mechanical property, the hardness distribution in staged from low to high from inside to outside of surfacing part, outermost layer hardness is greater than 45HRC, even reach 55 ~ 60HRC, its impact flexibility and intensity reach suitable with roll shaft, even exceed mother metal 1 ~ 2 times, the ability of antifatigue pull out type fracture is strong, built-up welding Be very effective, welding quality requirement can be met completely, be specially adapted to the built-up welding of cylindrical and large flat work pieces, but be not suitable for built-up welding finding.
The invention still further relates to a kind of surfacing equipment for repairing after large-scale roll shaft wearing and tearing, as shown in Figure 2, rail plate 7 is connected with slide block 8, slide block 8 can be free to slide to from left to right on rail plate, mechanical arm 20 comprises slide block 8, connecting rod 11 and rotates boss 17, slide block 8 lower end is fixed with connecting rod 11, connecting rod 11 on mechanical arm 20 has 3 sections, one section, upper end is fixedly connected with slide block 8, lower end is connected with and rotates boss 17, connecting rod 11 and connecting rod 11 coupling part can freely be rotated, and reach and rotate and flexible function, in order to control the locus rotating boss 17; Rotate boss 17 can freely rotate with lower end link 11 coupling part, rotate on boss 17 and be installed with welding gun 14, ultrasonic fault detector probe 15 and oxy-acetylene rifle head 16, so just can control by main equipment 18 position rotating each rifle head or probe on boss 17, realize calling arbitrarily one of them rifle head or probe and make the effect of its work; Welding gun 14 is connected with wire feeder, send solder flux mechanism, cooling water system unifies control line, main equipment 18 controls welding gun 14 by control line and works; Ultrasonic fault detector probe 15 is electroacoustic transducer, electroacoustic transducer by return come sound wave be converted to electric pulse, then by the circuit transmission on electroacoustic transducer on the display of main equipment 18, realize the object of real-time test and monitoring; Oxy-acetylene rifle head 16 is connected to oxygen conveying pipe, acetylene conveying pipe and control circuit, and main equipment 18 controls oxy-acetylene rifle head 16 by control circuit and works, and oxygen conveying pipe and acetylene conveying pipe are connected on oxygen cylinder and acetylene cylinder respectively.
In Fig. 2, the vertical direction of rail plate 7 is also provided with slide block 8, slide block 8 herein can freely up and down slide on rail plate 7, slide block 8 is fixedly connected with connecting rod 11, and connecting rod 11 has four sections, the connecting rod 11 of upper end is fixedly connected with slide block 8, the connecting rod 11 of lower end is connected with T-shaped bar 19, and the part connected between each connecting rod is free to rotate, in like manner, also be rotate and flexible function to reach, in order to control the locus of rotary-grinding wheel and tup; The part that T-shaped bar is connected with connecting rod 11 is free to rotate, and T-shaped bar upper end is fixedly connected with grinding wheel 12, and lower end is fixedly connected with tup 13, and grinding wheel 12 and tup 13 realize position by the part rotation connected between T-shaped bar 19 and connecting rod 11 and exchange up and down.
In Fig. 2, support 9 is a pair, and is fixedly mounted on the right and left of support, and every limit support 9 is connected with rotating transmitting gear 10, the axle head of the endoporus stationary roller shaft 1 of transmitting gear 10, and when transmitting gear 10 rotates, roll shaft 1 also and then rotates.
When roll shaft 1 after turning is good is placed on support 9, transfers T-shaped bar 19 and rotate, make grinding wheel 12 be placed in lower end, then by the flexible of connecting rod 11 with rotate the position and the angle that adjust grinding wheel, realizing roll shaft 1 needs the part of polishing to polish.After welds prepares, main equipment 18 control link 11 Telescopic rotating also rotates and rotates boss 17 and call oxy-acetylene rifle 15 and work, and carry out preheating to whole roll shaft, transmitting gear 10 is with action roller shaft to rotate heating.After preheating, main equipment 18 control link 11 calls welding gun 14, then adjust welding gun 14 and perform built-up welding order to position to be welded, main equipment 18 is controlled welding parameter well and is carried out built-up welding, transmitting gear 10 now on support 9 is awaited orders, if built-up welding mode is spiral built-up welding, then transmitting gear 10 starts to rotate by the speed arranged, if built-up welding mode is step-by-step movement built-up welding, then transmitting gear 10 is by the speed rotated stepwise arranged.After one deck built-up welding, transfer T-shaped bar 19 and rotate, make tup be placed in lower end, adjust position, main equipment 18 controls tup and beats just surfacing part, abolishes welding slag.Go round and begin again like this, until roll shaft 1 local built-up welding is complete, then main equipment 18 controls the slide block 8 in rail plate 7 horizontal direction, and mobile mechanical arm 20 needs the position in the place of built-up welding to the next one, continues built-up welding.After built-up welding completes, unload lower roller shaft 1, then complete follow-up overlaying method, finally, be placed on support 9 again after overlaying method completes by roll shaft 1, main equipment 18 calls ultrasonic fault detector probe and carries out flaw detection to it, if defective, repeats above processing step.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the overlaying method after large-scale roll shaft wearing and tearing, is characterized in that, comprise the following steps:
Material analysis before step 1, weldering, roll shaft carries out preweld cleaning, welds prepares;
After step 2, welds prepares, carry out weld preheating;
After step 3, weld preheating terminate, automatic submerged arc welding is adopted to carry out built-up welding;
After step 4, built-up welding, abolish welding slag, carry out post weld heat treatment;
After step 5, heat treatment, finally carry out machining as requested.
2. the overlaying method after a kind of large-scale roll shaft wearing and tearing as claimed in claim 1, it is characterized in that, the concrete technology of described step 1 is: first record the original size of roll shaft and original complexion, then roll shaft carries out turning removing heat fatigue layer, carry out carrying out flaw detection process afterwards and guarantee the thorough Ex-all of fatigue crack, and then remove greasy dirt and the impurity on roll shaft surface, polishing is to base metals, polishing thickness is 3 ~ 4mm, make portion faces to be welded totally bright and clean with sander polishing, now record is carried out to roll surface size.
3. the overlaying method after a kind of large-scale roll shaft wearing and tearing as claimed in claim 2, it is characterized in that, the concrete technology of described step 2 is: after welds prepares, adopt oxygen-acetylene torch that whole roll shaft is heated to 250 ~ 300 DEG C comprehensively, programming rate is not more than 20 DEG C ∕ s, temperature retention time is pressed the every 100mm of roll shaft length and is calculated for mono-hour, and welding wire and solder flux are dried to 300 DEG C, insulation 2h.
4. the overlaying method after a kind of large-scale roll shaft wearing and tearing as claimed in claim 3, it is characterized in that, the concrete technology of described step 3 is: after weld preheating terminates, roll shaft is lifted on rotating support, first built-up welding roll shaft two ends, suitable welding wire and solder flux is selected according to roll shaft material, then ground floor welding is carried out, ground floor gage of wire used is 2.0mm, adopt DC reverse connection, welding current is 190 ~ 220A, weldingvoltage is 30 ~ 33V, speed of welding is 210 ~ 230mm/min, electrode extension is 23 ~ 27mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, built-up welding from left to right, built-up welding thickness is 2.5mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete ground floor built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, carry out second layer welding, second layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 220 ~ 280A, weldingvoltage is 28 ~ 31V, speed of welding is 240 ~ 280mm/min, electrode extension is 23 ~ 27mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, right-to-left built-up welding, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete second layer built-up welding, after welding terminates, treat roll shaft cooling 10min, hammering is carried out with tup, abolish welding slag, carry out third layer welding, third layer gage of wire used is 2.5mm, adopt DC reverse connection, welding current is 220 ~ 280A, weldingvoltage is 28 ~ 31V, speed of welding is 240 ~ 280mm/min, electrode extension is 23 ~ 27mm, amount of lap between every one welding bead is 1/3, welding wire top rake is 6 °, built-up welding from left to right, built-up welding thickness is 3mm, after one welding bead completes, rotate roll shaft, rotate the width that size is a welding bead, then built-up welding is from left to right continued, such week and repeatedly, until complete third layer built-up welding, like this, later each layer by that analogy, finally stays the weldering meat height of 2 ~ 3mm in the plane of roll shaft, then continues to adopt above-mentioned steps roll shaft mid portion to carry out built-up welding, until built-up welding is complete.
5. the overlaying method after a kind of large-scale roll shaft wearing and tearing as claimed in claim 4, it is characterized in that, the concrete technology of described step 4 is: after welding, abolish welding slag, after roll shaft mineral wool being wrapped up insulation 30min, slow cooling, to room temperature, reinstalls after slow cooling terminates in heating furnace and carries out temper again, heating furnace is warming up to 500 DEG C, programming rate keeps 100 DEG C/h, comes out of the stove when cooling to 150 DEG C with the furnace after insulation 5h, cool to room temperature.
6. the overlaying method after a kind of large-scale roll shaft wearing and tearing as claimed in claim 5, it is characterized in that, the concrete technology of described step 5 is: after heat treatment, with supersonic detector, carrying out flaw detection is carried out to surfacing part, if defectiveness, need a defect turning to fall built-up welding again, if do not have defect, this can carry out machining according to drawing.
7. the overlaying method after a kind of large-scale roll shaft wearing and tearing as described in one of claim 1 ~ 6, it is characterized in that, if roll shaft is cold rolling roll shaft, the chemical constituent of welding wire used is (% calculates by weight percentage): carbon is 0.17 ~ 0.23%, and manganese is 1.2 ~ 1.6%, chromium is 4.8 ~ 6.0%, tungsten is 0.8 ~ 1.7%, and molybdenum is 0.6 ~ 1.3%, and other constituent content is 0.8 ~ 2.0%, surplus is iron, and selected solder flux is HJ107 solder flux.
8. the surfacing equipment for repairing after large-scale roll shaft wearing and tearing, comprise main equipment (18), rail plate (7), mechanical arm (20), support (9), it is characterized in that, described rail plate (7) is connected with slide block (8), described mechanical arm comprises slide block (8), connecting rod (11), with rotation boss (17), described slide block (8) lower end is fixed with connecting rod (11), connecting rod (11) on described mechanical arm has 3 sections, one section, upper end is fixedly connected with slide block (8), lower end is connected with and rotates boss (17), connecting rod (11) and connecting rod (11) coupling part can freely be rotated, described rotation boss (17) and lower end link (11) coupling part can freely be rotated, rotate on boss (17) and be installed with welding gun (14), ultrasonic fault detector probe (15) and oxy-acetylene rifle head (16), (14) are connected with wire feeder with described welding gun, send solder flux mechanism, cooling water system is unified control line, main equipment (18) controls welding gun (14) work by control line, described ultrasonic fault detector probe (15) is electroacoustic transducer, electroacoustic transducer is converted to electric pulse by returning the sound wave come, then by the circuit transmission on electroacoustic transducer on the display of main equipment (18), described oxy-acetylene rifle head (16) is connected to oxygen conveying pipe, acetylene conveying pipe and control circuit, and main equipment (18) controls oxy-acetylene rifle head (16) work by control line.
9. a kind of for the rear surfacing equipment repaired of large-scale roll shaft wearing and tearing as claimed in claim 8, it is characterized in that, the vertical direction of described rail plate (7) is also provided with slide block (8), slide block (8) is fixedly connected with connecting rod (11), connecting rod (11) has four sections, the connecting rod (11) of upper end is fixedly connected with slide block (8), the connecting rod (11) of lower end is connected with T-shaped bar (19), the part connected between each connecting rod is free to rotate, the part that described T-shaped bar is connected with connecting rod (11) is free to rotate, T-shaped bar upper end is fixedly connected with grinding wheel (12), lower end is fixedly connected with tup (13), grinding wheel (12) and tup (13) realize position by the part rotation connected between T-shaped bar (19) and connecting rod (11) and exchange up and down.
10. a kind of for the rear surfacing equipment repaired of large-scale roll shaft wearing and tearing as claimed in claim 8, it is characterized in that, described support (9) is a pair, and be fixedly mounted on the right and left of support, every limit support (9) is connected with rotating transmitting gear (10), the axle head of the endoporus stationary roller shaft (1) of described transmitting gear (10), when transmitting gear (10) rotates, roll shaft (1) also and then rotates.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316311A (en) * | 2001-05-28 | 2001-10-10 | 宝山钢铁股份有限公司 | Hard-surface alloy wire for build-up welding roller surface |
| CN1439476A (en) * | 2003-02-24 | 2003-09-03 | 天津大学 | Build-up welding process for repairing cold rolling intermediate roller |
| CN200963723Y (en) * | 2006-10-25 | 2007-10-24 | 宝山钢铁股份有限公司 | Overlay welding machine |
| CN101244485A (en) * | 2007-02-16 | 2008-08-20 | 北京石油化工学院 | Method and equipment for repairing cracks in underwater steel structures by friction stitch welding |
| CN101722385A (en) * | 2008-10-29 | 2010-06-09 | 中冶集团建筑研究总院 | Flux-cored wire and method for welding hot-rolled back-up roll by same |
| CN104084750A (en) * | 2014-07-10 | 2014-10-08 | 河北瑞兆激光再制造技术有限公司 | Submerged-arc welding repair method after alkali production squeezing roller is worn |
| CN104668722A (en) * | 2013-11-29 | 2015-06-03 | 成都焊研科技有限责任公司 | Special roll surfacing welding machine |
| CN205129125U (en) * | 2015-10-27 | 2016-04-06 | 张荣斌 | Build -up welding equipment and automatic control system thereof |
-
2015
- 2015-10-27 CN CN201510704092.6A patent/CN105382378B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316311A (en) * | 2001-05-28 | 2001-10-10 | 宝山钢铁股份有限公司 | Hard-surface alloy wire for build-up welding roller surface |
| CN1439476A (en) * | 2003-02-24 | 2003-09-03 | 天津大学 | Build-up welding process for repairing cold rolling intermediate roller |
| CN200963723Y (en) * | 2006-10-25 | 2007-10-24 | 宝山钢铁股份有限公司 | Overlay welding machine |
| CN101244485A (en) * | 2007-02-16 | 2008-08-20 | 北京石油化工学院 | Method and equipment for repairing cracks in underwater steel structures by friction stitch welding |
| CN101722385A (en) * | 2008-10-29 | 2010-06-09 | 中冶集团建筑研究总院 | Flux-cored wire and method for welding hot-rolled back-up roll by same |
| CN104668722A (en) * | 2013-11-29 | 2015-06-03 | 成都焊研科技有限责任公司 | Special roll surfacing welding machine |
| CN104084750A (en) * | 2014-07-10 | 2014-10-08 | 河北瑞兆激光再制造技术有限公司 | Submerged-arc welding repair method after alkali production squeezing roller is worn |
| CN205129125U (en) * | 2015-10-27 | 2016-04-06 | 张荣斌 | Build -up welding equipment and automatic control system thereof |
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| CN106238878A (en) * | 2016-08-17 | 2016-12-21 | 安徽鼎恒再制造产业技术研究院有限公司 | A kind of shaft-like workpiece submerged welding process |
| CN106670739A (en) * | 2016-12-05 | 2017-05-17 | 安徽兴林机械集团有限公司 | Surface treatment technology for grinding roller surfacing |
| CN106695147A (en) * | 2016-12-05 | 2017-05-24 | 安徽兴林机械集团有限公司 | Annealing treatment process for grinding roller overlaying |
| CN109290747A (en) * | 2016-12-05 | 2019-02-01 | 安徽兴林机械集团有限公司 | A kind of process of surface treatment of grinding roll overlaying |
| CN106670739B (en) * | 2016-12-05 | 2019-02-12 | 安徽兴林机械集团有限公司 | A kind of process of surface treatment of grinding roll overlaying |
| CN106735733A (en) * | 2016-12-21 | 2017-05-31 | 中国人民解放军装甲兵工程学院 | What a kind of endoporus parts inwall was damaged automatically controls Precision Pulse welder |
| CN106735733B (en) * | 2016-12-21 | 2018-05-08 | 中国人民解放军装甲兵工程学院 | A kind of endoporus parts inner wall damage automatically controls Precision Pulse welder |
| CN107052609A (en) * | 2017-04-28 | 2017-08-18 | 马鞍山市中冶机械有限责任公司 | A kind of overlaying method of the heavily loaded axle class open type die cavity forging die working face of high abrasion |
| CN107096979A (en) * | 2017-06-10 | 2017-08-29 | 中国人民解放军装甲兵工程学院 | A kind of arc-welding of Shaft of Titanium Alloy class wear-out part increases material reproducing method |
| CN108311772A (en) * | 2018-01-17 | 2018-07-24 | 湖北理工学院 | The strength-toughening treatment process of roll stell Bead weld repair |
| CN108655538A (en) * | 2018-05-08 | 2018-10-16 | 大唐洛阳首阳山发电有限责任公司 | The overlaying method of MPS-200 Roller of Coal Grinder, lining tile |
| CN109202365A (en) * | 2018-11-12 | 2019-01-15 | 湖北秦鸿新材料股份有限公司 | A kind of online build-up welding repair method of coal pulverizer roller set |
| CN110052687A (en) * | 2019-04-30 | 2019-07-26 | 襄阳润欣圆锻造有限公司 | A kind of split type forming punching head welding procedure |
| CN110153533A (en) * | 2019-05-28 | 2019-08-23 | 江阴市文斌机械制造有限公司 | Environment-friendly wear-resistant belt surfacing structure and technology |
| CN112122877A (en) * | 2020-09-09 | 2020-12-25 | 湖北金华凯机械有限公司 | Online surfacing repair method for large grinding roller sleeve |
| CN112475560A (en) * | 2020-11-19 | 2021-03-12 | 黄石市高潮工矿机械有限公司 | Welding flux for repairing pipe die and pipe die repairing method |
| CN113478170A (en) * | 2021-08-18 | 2021-10-08 | 重庆大学 | Welding and forging composite process and device for remanufacturing surface of metallurgical roller way |
| CN113478170B (en) * | 2021-08-18 | 2022-06-24 | 重庆大学 | Welding and forging composite process and device for remanufacturing surface of metallurgical roller way |
| CN114192582A (en) * | 2021-12-06 | 2022-03-18 | 江苏锦航机械制造有限公司 | Roller cleaning device with crack repairing structure |
| CN115283876A (en) * | 2022-09-13 | 2022-11-04 | 上海外高桥造船有限公司 | Defect handling method for crane hook shaft |
| WO2024212623A1 (en) * | 2023-04-12 | 2024-10-17 | 中国石油大学(华东) | Surfacing process for outer wall of pipe |
| CN116673696A (en) * | 2023-06-16 | 2023-09-01 | 大冶特殊钢有限公司 | High-alloy small-specification material forging tool and manufacturing method thereof |
| CN117655582A (en) * | 2023-12-29 | 2024-03-08 | 安徽恒意硬面工程股份有限公司 | Infinite chilled cast iron substrate surfacing welding wire and surface repairing process |
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