CN101412158B - Flux-cored wire for producing hot rolling coiler wrapper roller by overlaying welding and overlaying welding method - Google Patents
Flux-cored wire for producing hot rolling coiler wrapper roller by overlaying welding and overlaying welding method Download PDFInfo
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- CN101412158B CN101412158B CN 200810305875 CN200810305875A CN101412158B CN 101412158 B CN101412158 B CN 101412158B CN 200810305875 CN200810305875 CN 200810305875 CN 200810305875 A CN200810305875 A CN 200810305875A CN 101412158 B CN101412158 B CN 101412158B
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Abstract
The invention relates to a flux-cored wire for a wrapper roller of a hot rolling coiler through overlaying welding manufacturing, and an overlaying welding method thereof, and belongs to the technical field of overlaying welding. Aiming at the problem of easy steel bonding existing in the wrapper roller manufactured by the prior overlaying welding process, the invention provides the flux-cored wire for a wrapper roller of the hot rolling coiler through overlaying welding manufacturing and the overlaying welding method thereof. The outer coating of the welding wire is nickel base, and the coreconsists of the following components in weight percentage: 4.00 to 6.00 percent of low-carbon ferromanganese, 32.00 to 36.00 percent of chromium, 30.00 to 34.00 percent of molybdenum, 0.30 to 0.50 percent of vanadium, 3.00 to 5.00 of ferrosilicon, 6.00 to 12.00 percent of ferrum, 7.00 to 10.00 percent of tungsten, 2.50 to 3.00 percent of cobalt powder and 6.00 to 10.00 percent of fluorite. If thewelding wire is used to manufacture the wrapper roller through overlaying welding repair, the pre-heating before welding, the overlaying welding of a transition layer and the thermal insulation are not necessary, the overlaying welding is reduced by more than half, and the heat treatment after welding is not necessary; more importantly, compared with the prior new roller, the service life of the roller after the overlaying welding is prolonged by more than 4 to 5 times, and the steel is not bonded in the using process.
Description
Technical field
The present invention relates to a kind of flux-cored wire and overlaying method that is used for producing hot rolling coiler wrapper roller by overlaying, belong to the technique for overlaying field.
Background technology
Because the manufacture method of the compound metallurgical roller of built-up welding is one of method comparatively advanced during composite roll is produced both at home and abroad at present, alternative traditional roll manufacture method.Built-up welding composite roll roll than other method manufacturing on performance has bigger advantage, the product good combination property, and high life, and can repair repeatedly low cost of manufacture repeatedly.In addition, the built-up welding composite roll can solve the roll breakage problem in the steel rolling industry production, can improve the operating rate of roll, reduces the roller consumption, thereby can create huge economic benefit for Metallurgical Enterprise.On the other hand,, fully rationally utilized resource, met the theory of manufacturing engineering again of national requirements, had the good social benefit because metal alloy compositions has been saved in repeatedly using repeatedly of the material of roll roll centre greatly.Simultaneously, along with the continuous improvement and the raising of resurfacing welding material (deposited metal) performance and technique for overlaying, the built-up welding reparation of roll and manufacturing never only only limit to ordinary steel matter roll.Scientific and technical personnel have carried out number of research projects aspect resurfacing welding material both at home and abroad, and have obtained bigger progress.Wlding expands to various ways such as welding, prealloy powder, flux-cored wire from single solid welding wire of past.But make resurfacing welding material (deposited metal) should satisfy the very abominable working condition of roll, possesses good welding technological properties again, roll is of a great variety in addition, and performance requirement is widely different, and it is slower than what expect to make this research work and actual application progress.Particularly the stiff dough roller of some high rigidity requirements as the vitals of hot rolling downcoiler, helps the built-up welding manufacturing of winding up roller, still faces the great tackling key problem difficult problem that metallurgy industry needs to be resolved hurrily.
The main effect that helps winding up roller is to draw rolling good thin plate to go into volume and rolling.According to its working condition, require to have very high heat-resisting quantity, thermal fatigue and abrasion resistance properties, and require body surface non-stick steel in use.Some roll manufacturing firms are when the built-up welding manufacturing helps winding up roller or reparation to help winding up roller both at home and abroad, the main employing prepares roll centre → flaw detection → weld preheating → insulation built-up welding transition zone → insulation built-up welding working lining → post weld heat treatment → postwelding machined → finished product detection → finished product oiling, the complicated technology flow process of packing, and adopt the built-up welding of martensite build-up welding alloy material to help the winding up roller work layer on surface, in weld deposit process and post weld heat treatment process, carbide can be separated out on matrix in disperse, form post-curing, the metallographic structure that finally makes this work layer on surface is martensite+carbide, and hardness can reach more than the HRc52; Through the winding up roller that helps of this built-up welding manufacturing, can satisfy its operation technique requirement high temperature resistant and abrasion resistance properties substantially, but in use have the steel bonding phenomenon always, this exerts an influence to board quality.Iron and steel enterprise in use helps winding up roller generation steel bonding phenomenon, whenever for guaranteeing the plate surface quality; then must shut down reconditioning or roller rolled off the production line and use on the machine again again after the integral grinding; also cause helping winding up roller to lose efficacy when serious and scrap, service life is short, is generally 5-6 month.So steel bonding is the main failure mode that helps winding up roller.Simultaneously, because preheating in this technical process and insulation built-up welding operation are all carried out in special-purpose heating mantles or special heating furnace, temperature requirement is controlled at martensite and begins above 20-50 ℃ of transition temperature (Ms point), usually at 300-400 ℃, even carry out continuous built-up welding on the higher temperature, cause workman's operating environment poor, bring very big inconvenience to built-up welding operation and quality control, and be unfavorable for guaranteeing the built-up welding workmanship.Therefore, how correctly to select a kind of new resurfacing welding material for use, adopt a kind of new bead-welding technology, the employing process flow is simple, easy to operate, be easy to observe and control the new method of quality, on roll centre surface that low-carbon and low-alloy that a kind of obdurability meets the demands or middle carbon structure forged steel are made or utilize time-expired and on the old roller surface that roll centre is intact, the heat-resisting quantity that built-up welding one deck is new, thermal fatigue and abrasion resistance properties be the alloy-layer of body surface non-stick steel better and in use, and significantly improve service life, just become technical staff's a important subject.
Summary of the invention
Technical problem to be solved by this invention is the problem that helps the easy steel bonding of winding up roller at present bead-welding technology manufacturing, and a kind of new welding wire and the method for producing hot rolling coiler wrapper roller by overlaying are provided.
Technical scheme of the present invention:
Welding wire crust of the present invention is a nickel, the medicine core component is as follows: low-carbon ferromanganese 4.00～6.00wt%, chromium 32.00～36.00wt%, molybdenum 30.00～34.00wt%, vanadium 0.30～0.50wt%, ferrosilicon 3.00～5.00wt%, iron 6.00～12.00wt%, tungsten 7.00～10.00wt%, cobalt powder 2.50～3.00wt%, fluorite 6.00～10.00wt%.
Welding wire of the present invention is to be prepared from by following method: the crust raw material that with the nickel strap is welding wire, with low-carbon ferromanganese, crome metal, metal molybdenum, vanadium metal, ferrosilicon, iron powder, tungsten powder, cobalt powder, fluorite powder and ferroalloy are cut out band, the oven dry of deoiling, the oven dry of medicine core batching as the medicine core component through nickel strap, are rolled into flux-cored wire.Ferromanganese comprises manganese metal, low-carbon (LC), middle carbon, high carbon ferromanganese, and the present invention selects low-carbon ferromanganese, and adding an amount of manganese mainly is for desulfurization.
The welding wire section has O type, E type etc.Preferred O type.Nickel strap is rolled into " U " type and in " U " type, loads welding agent, again nickel strap is rolled into " O " type, be drawn into the flux-cored wire of section then for " O " type.
The technological process of the method for producing hot rolling coiler wrapper roller by overlaying of the present invention is made of following operation, roll centre preliminary treatment → flaw detection → built-up welding working lining → postwelding machined → flaw detection → finished product oiling, packing.
1, roll centre preliminary treatment
New roll centre can be adopted and do low-carbon and low-alloy or the manufacturing of middle carbon structure forged steel that a kind of obdurability meets the demands.Before the built-up welding, the turning of built-up welding roll surface diameter is machined to (D-6) mm, tolerance is ± 0.15mm that D is for helping winding up roller finished product barrel diameter (as follows).
For adopting old roller is roll centre, and the surface fatigue layer and the blemish turning of the old roller body of roll is clean, and the turning of roll surface diameter is machined to (D-6) mm, and tolerance is ± 0.15mm.For old roller body surface, after turning surface fatigue layer and blemish,, its size be carried out soldering and return to this size if when size does not reach this and requires.
Behind above-mentioned turning and size restoration, after guaranteeing roll overlaying, monolateral effective used thickness of roll finished product reaches 3mm at least.
2, flaw detection
New system roll centre and old roller, all must carry out flaw detection after rough turn, magnetic powder inspection, ultrasonic examination are adopted in method of detection, its roller surface defect of magnetic particle testing, inner defect of roller is checked in ultrasonic examination, uses and the defective of roller surfaces built-up welding to guarantee that matrix surface and roll inside before the roll overlaying do not influence.The serious internal injury of preparation roll centre or old roller roll centre if detect a flaw out (comprising roller footpath and roll surface) does not then allow to carry out built-up welding manufacturing work again.
3, built-up welding working lining
Before the built-up welding that dirt cleaning, the cleaning on built-up welding surface is clean.
Overlaying method adopts Lincoln weld, and is simple to operation, do not need to carry out in incubator built-up welding, and operating process is easy to observe, and is easy to control quality.
The built-up welding operation selects for use welding wire of the present invention to join fysed flux (as HJ107) or sintered flux (as SJ601) as resurfacing welding material: make overlay cladding (working lining) component after its built-up welding reach (mass fraction) (%): C≤0.1,14.5≤Cr≤16.5,15≤Mo≤17,4.0≤Fe≤7.0, Co≤2.5,0.1≤V≤0.2,3.0≤W≤4.5, Si≤1.0, P≤0.04, S≤0.03, the Ni surplus.
The consumption of solder flux is generally about 1.2 times that welding wire consumes.Can suitably adjust according to operative employee's practical operation situation and bead-welding technology parameter.
4, the postwelding machined comprises turning processing and rotary pressing processing, and the rotary pressing processing purpose is further to improve surfacing hardness.
The solder flux that adopts nickel-based welding wire of the present invention to join 1.2 times helps the resurfacing welding material of winding up roller as the hot rolling downcoiler, and the metallographic structure of built-up welding working lining metal is mainly austenite, and contains intermetallic compound.In weld deposit process, elements such as Cr, W, Mo, Co improve adhesion between the deposited metal atom on the one hand on Ni-based, produce lattice distortion, reduce stacking fault energy, stop dislocation motion, improve recrystallization temperature and strengthen solid solution; On the other hand, Co combines with carbon, carbide (M can occur in tissue
7C
3Or M
6C) sclerosis phase can improve the hardness and the high temperature abrasion resistance of overlay cladding; But the metal level hardness after the built-up welding is still lower, is convenient to turning processing; Further improve the hardness of deposited metal layer after the turning processing again by rotary pressing processing, can remove HRc52-55.
And adopt the winding up roller that helps of existing martensite build-up welding alloy material built-up welding manufacturing, the metallographic structure of built-up welding working lining metal is martensite+carbide, and require working lining hardness to reach more than the HRc52, it is by reaching this purpose at weld deposit process and post weld heat treatment, carbide can be separated out on matrix in disperse, form post-curing, to improve the hardness and the wearability of roll overlaying working lining.Though but in it uses, can guarantee that it is high temperature resistant, the abrasion resistance properties instructions for use, and in use there is the steel bonding phenomenon always, the steel bonding problem fails fundamentally to be resolved.Simultaneously, working lining hardness reaches more than the HRc52, the machined difficulty.
In a word, adopt the winding up roller that helps of resurfacing welding material of the present invention and existing martensite build-up welding alloy material built-up welding manufacturing, the metallographic structure of the two, operation principle differ widely, and have thoroughly changed traditional selection method.
The invention has the advantages that:
One, adopt welding wire of the present invention to be applied to the hot rolling downcoiler to help the winding up roller built-up welding after, deposited metal has good heat-resisting quantity, thermal fatigue and abrasion resistance properties, and body surface non-stick steel in use, can surpass more than 45 times of former new roller level service life, by being increased to more than 2 years the original 5-6 month, reach as high as 3 years.
Two, adopt welding wire of the present invention to save technological processes such as weld preheating, insulation built-up welding transition zone, post weld heat treatment, thereby simplified the built-up welding operation greatly; The amount of built-up welding simultaneously reduces, and has saved resurfacing welding materials such as welding wire, solder flux greatly, has shortened the reparation manufacturing time, has greatly improved workman's built-up welding operating environment.
Three, deposited metal hardness is low, and machinability is good; After it finishes finished product roughing, can on special-purpose spinning oil (gas) filling device, carry out rotary pressing processing, improve the supreme machine of case hardness and use the hardness requirement.
Four, bead-welding technology process of the present invention be easy to grasp, easy and simple to handle, repair make help the winding up roller quality good.
Below by the specific embodiment foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following example.All technology that realizes based on foregoing of the present invention all belong to scope of the present invention.
The specific embodiment
The preparation of embodiment 1 flux-cored wire of the present invention
Be that 0.3-0.8mm, width are that the nickel strap of 8.0-16.0mm is the crust raw material of flux-cored wire with thickness, with metal powder and ferroalloy as main medicine core welding agent, cut out band, the oven dry of deoiling, the oven dry of medicine core batching through nickel strap, nickel strap is rolled into " U " type and filling welding agent in " U " type, be rolled into " O " type again, the section that is drawn into diameter then and is 2.0-4.0mm is " O " type flux-cored wire, the one-tenth bulk-breaking table 1 of its medicine core:
Table 1
Embodiment 2 producing hot rolling coiler wrapper roller by overlaying
1, the preliminary treatment of roll centre
The roll centre preparation can be adopted and be done low-carbon and low-alloy or the manufacturing of middle carbon structure forged steel that a kind of obdurability meets the demands, and new roll centre is pressed design drawing by professed machine factory usually and made.Before the built-up welding, the turning of built-up welding roll surface diameter is machined to (D-6) mm, tolerance is ± 0.15mm that D is for helping winding up roller finished product barrel diameter.
For adopting old roller is roll centre, and the surface fatigue layer and the blemish turning of the old roller body of roll is clean, and the turning of roll surface diameter is machined to (D-6) mm, and tolerance is ± 0.15mm.For old roller body surface, after turning surface fatigue layer and blemish,, its size be carried out soldering and return to this size if when size does not reach this and requires.
Behind above-mentioned turning and size restoration, after guaranteeing roll overlaying, monolateral effective used thickness of roll finished product reaches 3mm at least.
2, flaw detection
New system roll centre and old roller, all must carry out flaw detection after rough turn, magnetic powder inspection, ultrasonic examination are adopted in method of detection, its roller surface defect of magnetic particle testing, inner defect of roller is checked in ultrasonic examination, uses and the defective of roller surfaces built-up welding to guarantee that matrix surface and roll inside before the roll overlaying do not influence.The serious internal injury of preparation roll centre or old roller roll centre if detect a flaw out (comprising roller footpath and roll surface) does not then allow to carry out built-up welding manufacturing work again.
3, built-up welding working lining
Before the built-up welding that dirt cleaning, the cleaning on built-up welding surface is clean, its method depends on by the kind of cleaning material.Workshop dirt, grease used vapour or remove with acetone and other nontoxic liquid.To lacquer and other foreign material that are insoluble to degreasing agent, available bases or other special-purpose synthetics clean.Afterwards, treat its dry back wait built-up welding.
Overlaying method adopts Lincoln weld, and is simple to operation, do not need to carry out in incubator built-up welding, and operating process is easy to observe, and is easy to control quality.
The Ni-based flux-cored wire (gage of wire can be made Φ 2.5mm-Φ 4.0mm specification) that wherein built-up welding operation embodiment 1 makes is joined HJ107 solder flux resurfacing welding material, make the chemical composition (mass fraction) of overlay cladding (working lining) metal after its built-up welding (%) as follows: C≤0.1,14.5≤Cr≤16.5,15≤Mo≤17,4.0≤Fe≤7.0, Co≤2.5,0.1≤V≤0.2,3.0≤W≤4.5, Si≤1.0, P≤0.04, S≤0.03, Ni surplus.
Not preheating before adopting overlaying method of the present invention to weld.Weld preheating is to adopt the built-up welding of martensite build-up welding alloy material to make the necessary operation of roll, the main purpose of preheating is to reduce the cooling velocity of deposited metal heat affected area in the weld deposit process, reduce tendency of hardenability and also reduce welding stress, prevent that mother metal and deposited metal from undergoing phase transition and cause crackle to produce in weld deposit process.
Adopt overlaying method of the present invention not need the built-up welding transition zone.The built-up welding transition zone is to adopt the built-up welding of martensite build-up welding alloy material to make the necessary operation of roll, its objective is for the toughness of improving the base metal fusion zone to peel off to prevent fracture of roller or wearing layer.
Adopt overlaying method weld deposit process of the present invention need not be incubated.Adopt the built-up welding of martensite build-up welding alloy material to make roll, require control preheating and interlayer temperature will be higher than its martensite and begin above 20-50 ℃ of transition temperature (Ms point), avoid deposited metal generation martensite phase transformation and quenching effect, the overall stack layer has been welded carry out martensite transfor mation simultaneously at resistor furnace for heat treatment afterwards, only in this way could guarantee tissue, the uniformity of hardness in built-up welding room.Because control preheating and interlayer temperature, in 300-400 ℃ of scope, this brings very big inconvenience for workman's working environment and built-up welding operation, is unfavorable for the quality that guarantees that built-up welding is made usually.And, in case quality problems occur, will cause doing over again and the increase of cost of manufacture.
Adopt the inventive method built-up welding amount few, built-up welding thickness only needs one to two layer of built-up welding, and used resurfacing welding material is few, guarantees that its finished surface work effective dimensions thickness (monolateral) reaches 3.0mm and gets final product.Adopt martensite build-up welding alloy material surfacing roll, for guaranteeing its service behaviour and chemical analysis requirement, usually want built-up welding just can reach needed chemical composition requirement at least more than three layers, guarantee its finished surface working lining effective thickness, want built-up welding 5-6 layer usually.Therefore, the built-up welding time of this technical scheme is short, has saved a large amount of alloy welding materials and built-up welding electricity consumption and coal gas equal energy source.
Adopt this technology not do post weld heat treatment.Adopt the roll of martensite build-up welding alloy material built-up welding, must do post weld heat treatment after having welded.Post weld heat treatment is carried out in the heat treatment electric furnace of special use, and main purpose is for improving the postwelding tissue and eliminating welding stress.Carbide can be separated out on matrix in disperse, thereby form post-curing, further improve the hardness and the wearability of roll overlaying working lining.
4, postwelding machined
4.1 turning processing
When built-up welding help winding up roller to be chilled to room temperature after, lathe carries out turning roughing by the figure paper size in the elder generation, roll surface is machined to D+ (0.6～0.8) mm, i.e. the allowance of on the basis of finished diameter size, reserving, figure paper conversion is pressed by all the other ones.
4.2 rotary pressing processing
The winding up roller that helps after the above-mentioned turning processing is installed on the special-purpose rotary pressing processing equipment, roll surface is rotated extrusion process, its objective is the case hardness that improves roll surface, treat that case hardness reaches HRC52 and when above till.
4.3 grinding
The roller that above-mentioned rotary pressing processing is qualified is installed on the grinding machine, carries out grinding by the drawing specification requirement, is ground to the drawing finished size, and surface roughness reaches the drawing requirement.
5, magnetic powder inspection, hardness test
To carrying out magnetic powder detection through the qualified hot rolling reeling machine aided winding up roller of finished product processing, quality standard is: weld defects such as no slag inclusion, incomplete fusion, lack of penetration, crackle, carry out oiling after qualified, the packing wait uses on the machine.
Below be example to climb the built-up welding of steel hot rolling reeling machine aided winding up roller, its roll surface specification is that Φ 380mmx1450mm (roll surface diameter x barrel length) is that Φ 2.5mm, Φ 3.0mm, three specifications of Φ 4.0mm are described in further detail the present invention by concrete gage of wire.
It is that Φ 2.5mm flux-cored wire carries out built-up welding that test example 1 is selected specification for use, makes hot rolling reeling machine aided winding up roller
The turning of built-up welding roll surface diameter is machined to behind (D-6) mm through flaw detection, and influence is used and the defective of roller surfaces built-up welding, adopts the nickel-based welding wire sample 1 of embodiment 1 making to join the HJ107 solder flux and carries out built-up welding.
Electric power polarity: dc reverse connection;
Welding current: 220～300A;
Weldingvoltage: 28～32V;
Speed of welding: 200～250mm/min;
Dry extension of electrode: 25～28mm;
Eccentric throw: 25～28mm;
Amount of lap: adjacent welding bead overlap joint 50-60%;
The built-up welding number of plies: 1～2 layer, built-up welding thickness will guarantee finished size processing when concrete built-up welding, guarantees that monolateral effective used thickness of roll finished product reaches 3mm.
The roll surface diameter is Φ 374mm before the built-up welding, and the roll surface diameter is Φ 384mm after the built-up welding, and used welding wire is 76kg, and solder flux is 92kg.After subsequent treatment such as postwelding machined, case hardness can reach HRc52.6, and non-stick steel in the use uses and do not see the damage vestige after 18 months.
And adopt the same specification of original method built-up welding manufacturing help winding up roller the time, the roll surface diameter needs turning to Φ 364mm before the built-up welding, wants first built-up welding one deck transition zone during built-up welding, built-up welding working lining more afterwards, the built-up welding of roll surface diameter is to D+ (4～6) mm.The roll surface diameter is Φ 384mm after built-up welding, and used welding wire is 149kg, and solder flux is 178kg.
On year-on-year basis, adopt the inventive method, it is 73kg that welding wire is saved in wlding consumption, and the saving solder flux is 86kg.
It is that Φ 3.0mm flux-cored wire carries out built-up welding that test example 2 is selected specification for use, makes hot rolling reeling machine aided winding up roller
The turning of built-up welding roll surface diameter is machined to behind (D-6) mm through flaw detection, and influence is used and the defective of roller surfaces built-up welding, adopts the flux-cored wire sample 2 of embodiment 1 making to join the HJ107 solder flux and carries out built-up welding.
Electric power polarity: dc reverse connection;
Welding current: 300～400A;
Weldingvoltage: 28～32V;
Speed of welding: 300～350mm/min;
Stem elongation: 28～30mm;
Eccentric throw: 28～30mm;
Amount of lap: adjacent welding bead overlap joint 50-60%;
The built-up welding number of plies: 1～2 layer, built-up welding thickness will guarantee finished size processing when concrete built-up welding, guarantees that monolateral effective used thickness of roll finished product reaches 3mm.
After the built-up welding of last bead-welding technology parameter, barrel diameter can reach D+ (4～6) mm, treats afterwards to carry out finished product processing after the roller surfaces temperature is reduced to room temperature.
The roll surface diameter is Φ 374mm before the built-up welding, and the roll surface diameter is Φ 385mm after the built-up welding, and used welding wire is 85kg, and solder flux is 102kg.After subsequent treatment such as postwelding machined, case hardness can reach HRc53, and non-stick steel in the use uses and do not see the damage vestige after 26 months.
And adopt the same specification of original method built-up welding manufacturing help winding up roller the time, the roll surface diameter needs turning to Φ 364mm before the built-up welding, wants first built-up welding one deck transition zone during built-up welding, built-up welding working lining more afterwards, the built-up welding of roll surface diameter is to D+ (4～6) mm.The roll surface diameter is Φ 385mm after built-up welding, and used welding wire is 159kg, and solder flux is 190kg.
On year-on-year basis, adopt this process program, it is 74kg that welding wire is saved in wlding consumption, and the saving solder flux is 88kg.
It is that Φ 4.0mm flux-cored wire carries out built-up welding that test example 3 is selected specification for use, makes hot-strip reels and helps winding up roller
The turning of built-up welding roll surface diameter is machined to behind (D-6) mm through flaw detection, and influence is used and the defective of roller surfaces built-up welding, adopts the flux-cored wire sample 3 of embodiment making to join the HJ107 solder flux and carries out built-up welding.
Electric power polarity: dc reverse connection;
Welding current: 350～450A;
Weldingvoltage: 29～33V;
Speed of welding: 350～450mm/min;
Dry extension of electrode: 30～35mm;
Eccentric throw: 30～35mm;
Amount of lap: adjacent welding bead overlap joint 50～60%;
The built-up welding number of plies: the 1-2 layer, built-up welding thickness will guarantee finished size processing when concrete built-up welding, guarantees that monolateral effective used thickness of roll finished product reaches 3.0mm.
The roll surface diameter is Φ 374mm before the built-up welding, and the roll surface diameter is Φ 386mm after the built-up welding, and used welding wire is 91.5kg, and solder flux is 110kg.Adopt the winding up roller that helps of this bead-welding technology parameter built-up welding, barrel diameter can reach D+ (4～6) mm.After subsequent treatment such as postwelding machined, case hardness can reach HRc53.5, and non-stick steel in the use uses and do not see the damage vestige after 18 months.
And adopt the same specification of original method built-up welding manufacturing help winding up roller the time, the roll surface diameter needs turning to Φ 364mm before the built-up welding, wants first built-up welding one deck transition zone during built-up welding, built-up welding working lining more afterwards, the built-up welding of roll surface diameter is to D+ (4～6) mm.The roll surface diameter is Φ 386mm after built-up welding, and used welding wire is 166kg, and solder flux is 200kg.
On year-on-year basis, adopt this process program, it is 74.5kg that welding wire is saved in wlding consumption, and the saving solder flux is 90kg.
In a word, adopt the inventive method, not preheating before the weldering does not need the built-up welding transition zone, need not be incubated, and the built-up welding amount is few, built-up welding thickness only needs one to two layer of built-up welding, does not do post weld heat treatment, and operation is simple, shortened the production time, improved the workman working environment, saved the energy, and be easy to guarantee to repair the quality of making.Adopt the roller life-span of built-up welding of the present invention can reach more than 4-5 times of former new roller level,, reach as high as 3 years by being increased to more than 2 years the original 5-6 month, and non-stick steel in the use.
Claims (7)
1. be used for the flux-cored wire of producing hot rolling coiler wrapper roller by overlaying, it is characterized in that: the welding wire crust is Ni-based, and the medicine core component is as follows:
Low-carbon ferromanganese 4.00～6.00wt%, crome metal 32.00～36.00wt%, metal molybdenum 30.00～34.00wt%, vanadium metal 0.30～0.50wt%, ferrosilicon 3.00～5.00wt%, iron powder 6.00～12.00wt%, tungsten powder 7.00～10.00wt%, cobalt powder 2.50～3.00wt%, fluorite powder 6.00～10.00wt%.
2. the described preparation method who is used for the flux-cored wire of producing hot rolling coiler wrapper roller by overlaying of claim 1, it is characterized in that: with the nickel strap crust raw material of flux-cored wire, with low-carbon ferromanganese, crome metal, metal molybdenum, vanadium metal, ferrosilicon, iron powder, tungsten powder, cobalt powder, the fluorite powder is made flux-cored wire as the medicine core component.
3. preparation method according to claim 2 is characterized in that: nickel strap is rolled into " U " type and loads the medicine core in " U " type, nickel strap is rolled into " O " type again, pulls into the flux-cored wire of section for " O " type then.
4. the method for a producing hot rolling coiler wrapper roller by overlaying, it is characterized in that may further comprise the steps: roll centre preliminary treatment → flaw detection → the built-up welding working lining → the postwelding machined is promptly;
Wherein, the roll centre preliminary treatment is meant the turning of built-up welding roll surface diameter is machined to (D-6) mm that tolerance is ± 0.15mm that D is for helping winding up roller finished product barrel diameter; Built-up welding adopts the described flux-cored wire of claim 1 to join solder flux as resurfacing welding material, and overlaying method adopts Lincoln weld, makes that the chemical composition mass percent of the working lining after the built-up welding is as follows: C≤0.1,14.5≤Cr≤16.5,15≤Mo≤17,4.0≤Fe≤7.0, Co≤2.5,0.1≤V≤0.2,3.0≤W≤4.5, Si≤1.0, P≤0.04, S≤0.03, the Ni surplus.
5. the method for producing hot rolling coiler wrapper roller by overlaying according to claim 4, its feature exists: for adopting old roller is roll centre, the surface fatigue layer and the blemish turning of the old roller body of roll is clean, and the turning of roll surface diameter is machined to (D-6) mm, and tolerance is ± 0.15mm; For old roller body surface, after turning surface fatigue layer and blemish,, its size be carried out soldering and return to this size if when size does not reach this and requires.
6. the method for producing hot rolling coiler wrapper roller by overlaying according to claim 4, its feature exists: the postwelding machined comprises turning processing and rotary pressing processing.
7. the method for producing hot rolling coiler wrapper roller by overlaying according to claim 6, its feature exists: behind above-mentioned turning and size restoration, after guaranteeing roll overlaying, monolateral effective used thickness of roll finished product reaches 3mm at least.
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| CN 200810305875 CN101412158B (en) | 2008-12-01 | 2008-12-01 | Flux-cored wire for producing hot rolling coiler wrapper roller by overlaying welding and overlaying welding method |
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| CN 200810305875 CN101412158B (en) | 2008-12-01 | 2008-12-01 | Flux-cored wire for producing hot rolling coiler wrapper roller by overlaying welding and overlaying welding method |
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| CN101412158A CN101412158A (en) | 2009-04-22 |
| CN101412158B true CN101412158B (en) | 2011-06-08 |
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Cited By (1)
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| CN111001992A (en) * | 2019-12-26 | 2020-04-14 | 四川国鑫机械制造有限公司 | Method for compositing rail beam blank-opening roller into semi-high-speed steel roller through overlaying welding |
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| CN101596635B (en) * | 2009-07-10 | 2011-08-24 | 攀钢集团钢铁钒钛股份有限公司 | Composite resurfacing welding method for sink roller and stabilizing roller used for hot dipping |
| CN102886654A (en) * | 2012-10-29 | 2013-01-23 | 海门市威菱焊材制造有限公司 | Process of nickel-based high-temperature alloy flux-cored welding wire on hard surface of wrapper roller |
| CN103612027B (en) * | 2013-12-12 | 2016-05-18 | 攀枝花钢城集团有限公司 | Flux-cored wire and its preparation method and application |
| JP6250475B2 (en) * | 2014-05-14 | 2017-12-20 | 株式会社神戸製鋼所 | Ni-based alloy flux cored wire |
| CN104117783B (en) * | 2014-07-23 | 2017-01-18 | 深圳市威勒科技股份有限公司 | Welding material and preparation method thereof |
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| CN105081521A (en) * | 2015-08-22 | 2015-11-25 | 湖北万安通复合再制造科技有限公司 | Precise surfacing welding method of high-hardness cold and hot rolls |
| CN109014654B (en) * | 2018-07-16 | 2020-12-11 | 中冶建筑研究总院有限公司 | Submerged arc surfacing flux-cored wire for composite (re) manufacturing continuous casting roller and process |
| CN108890075B (en) * | 2018-07-16 | 2021-11-19 | 中冶建筑研究总院有限公司 | Technology for overlaying composite (re) manufacturing continuous casting roller |
| CN108994425B (en) * | 2018-07-16 | 2020-12-15 | 中冶建筑研究总院有限公司 | Self-protection flux-cored wire for composite (re) manufacturing continuous casting roller and process |
| CN109514038A (en) * | 2018-12-04 | 2019-03-26 | 中冶建筑研究总院有限公司 | The new process of efficient compound (again) the manufacture Continuous Casting Rolls of built-up welding |
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| CN114535859B (en) * | 2022-01-11 | 2023-08-08 | 康硕(山西)低应力制造系统技术研究院有限公司 | Nickel-steel composite material arc 3D printing welding wire and preparation and additive manufacturing method |
| CN115555724B (en) * | 2022-10-20 | 2024-05-17 | 山东大学 | Seamless flux-cored wire for low-temperature steel laser arc composite welding and welding process |
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| CN111001992A (en) * | 2019-12-26 | 2020-04-14 | 四川国鑫机械制造有限公司 | Method for compositing rail beam blank-opening roller into semi-high-speed steel roller through overlaying welding |
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