CN104001905B - A kind of abrasion-resistant cast compound high speed steel roll and preparation method thereof - Google Patents
A kind of abrasion-resistant cast compound high speed steel roll and preparation method thereof Download PDFInfo
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Abstract
A kind of abrasion-resistant cast compound high speed steel roll and preparation method thereof, belongs to technical field of steel rolling.Abrasion-resistant cast compound high speed steel roll is composited by centrifugal casting by body of roll wear-resistant high speed steel and roller core hi-strength nodular iron, and body of roll wear-resistant high speed steel is through nickel magnesium alloy and the process of multicomponent alloy silk.Compound high speed steel roll, after air-blast quenching and high tempering, has that hardness is high, uniformity of hardness good and the feature such as roller core obdurability is good, on hot-rolling mill, has good result of use.
Description
Technical field
The invention discloses a kind of composite roll and preparation method thereof, particularly a kind of abrasion-resistant cast compound high speed steel roll and preparation method thereof, belongs to technical field of steel rolling.
Background technology
Roll is the important consumable tool in Rolling production, along with the development of steel rolling technology, the performance of breaker roll, particularly wear resistance at elevated temperature is had higher requirement, in order to improve roll high temperature abrasion resistance, most important approach adds to form high rigidity carbide formers and add in roll material to improve the anti-temper resistance element of matrix, and wherein modal is add the alloying elements such as tungsten, molybdenum, vanadium, niobium, has occurred high speed steel roll material thus.
Current high-speed steel roll is applied widely in Rolling production, and in order to improve high-speed steel roll performance further, Chinese invention patent CN103624230A discloses a kind of method combining outer Centrifugal Cast High Speed Steel Roll after the match.In high-speed steel roll rotating centrifugal casting process, in the outer set pulse formula magnetic field of mold, the frequency 10-20Hz of Pulsed Magnetic, pulse width is at 15-25 μ s, make the magnetic induction intensity in casting mold centre at 0.01-0.7T, meanwhile, an electrode is installed respectively at mold two ends, pass into galvanic current stream to the metal be in process of setting in spun casting process, the current density of DC current is 0.1-10A/m
2, utilize the reciprocation of DC current in Pulsed Magnetic and High Rotation Speed mold inner metal liquid to change the form separating out hard phase in high-speed steel roll process of setting, and utilize the effect of centrifugal casting to control the distribution of hard phase.This invention combines the technical advantage of Pulsed Magnetic, the casting of magneto-electric coupled and centrifugal rotation, significantly can improve the solidified inside tissue of high-speed steel roll, increase substantially life-span and the serviceability of roll.Chinese invention patent CN103624240A also discloses the method for centrifugal casting high boron high-speed steel roll under the electric field compound action of magnetic field.In high boron high-speed steel roll centrifugal casting process, fixing steady magnetic field is settled outward at mold, make the magnetic induction intensity in casting mold centre at 0.01-0.7T, simultaneously, install respectively at mold two ends conducting ring and and electrode contact, in spun casting process, pulse current is passed into the foundry goods be in process of setting, the voltage of pulse current is 100V-1500V, frequency 10-20Hz, pulse width is at 15-25 μ s, the electromagnetic oscillation effect that in the concussion of impulse electric field and magnetic field, charged rotation foundry goods is formed is utilized to change the form separating out hard phase in high boron high-speed steel roll process of setting, and utilize the effect of centrifugal casting to control the distribution of hard phase.This invention combines the technical advantage of impulse electric field, the casting of magneto-electric coupled and centrifugal rotation, significantly can improve the solidified inside tissue of high boron high-speed steel roll, increase substantially life-span and the serviceability of roll.Chinese invention patent CN103317115A also discloses a kind of manufacture method of compound high speed steel roll, comprises the following steps: raw material is placed in intermediate frequency furnace and carries out melting by the component requirements of the high-speed steel roll of melting as required; Stokehold processes; Adopt three layers of compound and centrifuging process cast roll; Roughing; Heat treatment; Fine finishining; Wherein, described melting comprises the smelting of outer molten steel, the fusing of metallic intermediate layer liquid and core molten iron is melting, described heat treatment comprises Quench and temper technique, and described tempering process is 400-450 DEG C of insulation 10-15 hour, then cools to air cooling of coming out of the stove after below 100 DEG C with the furnace.By the way, this invention can solve the problem being difficult between skin and core unlike material combine, and realizes the transition bonding in intermediate layer, has fabulous wearability and higher hardness, can ensure roll surface quality.Chinese invention patent CN103305775A also discloses a kind of high carbon high speed steel roll, comprise the following ingredients formed by mass percentage: C:1.8-2.8%, W:3-5%, Cr:5-8%, Mo:3.5-4%, V:4-6%, Nb:0.8-1.5%, Co:1-3%, Ni:0.5-1.5%, Al:0.3-0.6%, Si :≤1.0%, all the other are Fe and inevitable trace element.By the way, the high carbon high speed steel roll of this invention can improve wear-resistant and thermal fatigue resistance, is applied on bar mill finishing stand, rolling mill operating rate can be significantly improved, reduce stocking production cost, alleviate labor strength, improve service life.Chinese invention patent CN102828123A also discloses the method for the outer Metamorphism treatment of a kind of centrifugal compound casting high-speed steel roll, it is characterized in that, when the melting of layer high-speed steel completes and comes out of the stove outside, in ladle, add composite modifier Metamorphism treatment is carried out to high-speed steel molten iron, the addition of composite modifier is 1.0 ~ 2.0% of Metal Weight, and reaction temperature is 1500 ~ 1600 DEG C.The chemical component weight percentage of described composite modifier is: 50 ~ 55% vanadium iron FeV50,20 ~ 25% rare earth ferrosilicon alloy FeSiRe21,20 ~ 25% Si-Ba alloy FeBa5Si60,5 ~ 10%Al.Compared with prior art, the advantage of this invention is: refinement is cast crystal grain and improved chromium, carbide morphology, the tiny spherical MC type carbide of even dispersion distribution, improves the outer field wear-resisting and heat resistance of high-speed steel roll, makes roll millimeter stocking increase by 25 ~ 30% on year-on-year basis.Chinese invention patent CN102615108B also discloses a kind of centrifugal casting quick-cutting steel composite roller and manufacture method thereof, and composite roll is formed by centrifugal compound by outer high-speed steel, intermediate layer graphitic steel and core hi-strength nodular iron.The present invention is on existing high carbon and vanadium high speed steel roll basis, suitably reduces content of vanadium, adds niobium element simultaneously, and Nb/V controls at 0.3-0.5, make Nb become double carbide (V, Nb) C with V-arrangement, thus avoid form segregation under centrifugal action.The roller core of compound high speed steel roll adopts high-strength ductile cast iron, and be mixed into Cr for fuse with outer high-speed steel when preventing cast magnesium iron, B etc. cause the element of embrittlement, between skin and roller core, pour into a mould polynary graphitic steel intermediate layer.For preventing occurring crackle in roll centrifugal casting process, roll surface high speed steel material and intermediate layer graphitic steel being carried out to the microalloy treatment of thinning microstructure, reaching the object improving roll material thermal crack resistant ability.Chinese invention patent CN102366822A also discloses a kind of steel treatment method of high speed steel roll material, by alterant element rare earth magnesium ferrosilicon alloy, vanadium iron, ferrotianium, ferro-niobium, ferrozirconium, potassium oxide, calsibar alloy, be broken into 60 ~ 100 object powder containing nitrogenous ferrochrome, ferro-boron and zinc, mix by mass fraction; Adopt thickness 0.15 ~ 0.22mm mild steel steel band packaging, be rolled into diameter phi 5-8mm metal cored wire; Adopting Feed aluminum wire to be added in ladle by metal cored wire pours into a mould in the molten steel of high-speed steel roll, and the addition of metal cored wire is 8 ~ 10kg/T molten steel.This invented technology is easy, and alterant element recovery rate is high, and modification effect is stablized, and causes the mechanical property of high-speed steel roll and serviceability to significantly improve.Chinese invention patent CN102274856A also discloses a kind of centrifugal compound high-speed steel roll and pouring procedure thereof, roll comprises high-speed steel skin, intermediate layer, spheroidal graphite cast-iron core, the outer field chemical component weight percentage of described high-speed steel is: 1.8 ~ 2.6%C, 3 ~ 10%Cr, 0.2 ~ 1.0%Nb, 4 ~ 10%Mo, 5 ~ 10%V, 4 ~ 10%W, 2 ~ 10%Co, all the other are Fe and inevitable impurity, and its job step is as follows: 1) intermediate frequency furnace melting; 2) Metamorphism treatment is carried out; 3) centrifugal casting; 4) core casting; 5) car-type differential temperature stove is adopted to heat-treat.Compared with prior art, this beneficial effect of the invention is: 1) can significantly improve the outer field thermal fatigue resistance of high-speed steel and anti-wear performance.2) high-speed steel bond strength that is outer and intermediate layer reaches more than 400MPa, prevents that high-speed steel is outer field to be peeled off.Chinese invention patent CN101812646A also discloses the casting technique of High Speed Steel for Roller alloy, this technique first adopts fast quenching to get rid of band method obtained laminar nanocrystalline rare-earth silicon iron inoculator and laminar nanocrystalline ferro-boron fining agent respectively, crystal grain and structure refinement process is carried out again with the alterant breaker roll high-speed steel alloy tissue be made up of this nanocrystalline rare-earth silicon iron inoculator and nanocrystalline ferro-boron fining agent, to overcome the defect of high-speed steel alloy casting, its matrix grain of remarkable refinement also makes carbide suspension, thus significantly enhance the comprehensive mechanical property of obtained high-speed steel roll.Chinese invention patent CN101078090 also discloses a kind of low-alloy high speed steel roll material and manufacture method, the chemical composition of its material is (% by weight): C:1.2 ~ 1.8%, Cr:4.5 ~ 6.5%, W:1.0 ~ 3.0%, Mo:1.0 ~ 3.0%, V:3.0 ~ 5.0%, Al:0.6 ~ 1.2%, Si:0.8 ~ 1.2%, N:0.05 ~ 0.15%, B:0.04 ~ 0.12%, Nb:0.05 ~ 0.20%, Ti:0.06 ~ 0.18%, Y:0.04 ~ 0.15%, Mn < 0.5%, P < 0.04%, S < 0.04%, surplus Fe, and actual carbon content is: 0.033W+0.063Mo+0.060Cr+0.200V+ (0.08 ~ 0.20).Manufacture electro-smelting, roll adopts centrifugal composite casting or composite casting is shaping continuously, and roll carries out Quench and temper process after roughing, is finally refined to given size and precision.This low-alloy high speed steel roll material contains less tungsten, molybdenum alloy element, and not containing expensive cobalt element, production cost is low, has good red hardness, obdurability and wearability.Chinese invention patent CN1999804 also discloses a kind of novel high carbon high wolfram fast steel rolling roller and preparation method thereof, this invention medium high carbon height wolfram fast steel rolling roller contains: carbon 2.0 ~ 3.0%, tungsten 6.0 ~ 18.0%, vanadium 2.0 ~ 4.0%, molybdenum 1.0 ~ 3.0%, chromium 3.0 ~ 9.0%, silicon is less than 1.2%, and manganese is less than 1.2%; This high carbon high wolfram fast steel rolling roller made contains the MC type double carbide of vanadium, tungsten system.The preparation method of this invention medium high carbon height wolfram fast steel rolling roller is, deoxidation after high carbon high wolfram fast steel rolling being heated to 1580 ~ 1620 DEG C; 1400 ~ 1500 DEG C of casting, centrifugal casting mould is applied to the steady magnetic field of 0.05 ~ 0.25T simultaneously, and rotate to shaping with 600 ~ 1800 revs/min of rotating speeds.
But, above-mentioned high-speed steel roll ubiquity toughness is low, easily peel off in use procedure, fall block, affects the normal use of milling train, when using in milling train mm finishing mill unit especially, also exist and wear no resistance, under causing stocking poor surface quality and stocking dimensional accuracy, degradation is not enough.
Summary of the invention
The object of this invention is to provide a kind of preparation method of casting wear-resistant high speed steel composite roll, wear-resistant high speed steel composite roll of the present invention is thick for conventional high rate steel roll carbide size, and distribution of carbides is uneven, on traditional high carbon and vanadium high speed steel roll basis, by the improvement for the treatment of process outside optimizing components and smelting process and molten steel stove, reach the object of refined carbides and raising high-speed steel roll combination property.
Object of the present invention can be realized by following measures:
Abrasion-resistant cast compound high speed steel roll of the present invention is composited by centrifugal casting by body of roll wear-resistant high speed steel and roller core hi-strength nodular iron.The preparation technology of abrasion-resistant cast compound high speed steel roll of the present invention is as follows:
1. melting body of roll wear-resistant high speed steel and roller core hi-strength nodular iron in two medium-frequency induction furnaces respectively, wherein the smelting process of body of roll wear-resistant high speed steel is: first by steel scrap, carburant, ferrochrome, ferrotungsten, molybdenum-iron, vanadium iron and the fusing of ferro-niobium Hybrid Heating, when liquid steel temperature reaches 1570 ~ 1590 DEG C, sample analysis, when steel quality mark reaches 1.8 ~ 2.2%C, 4.5 ~ 6.0%Cr, 1.5 ~ 2.2%W, 5.5 ~ 6.5%Mo, 4.8 ~ 5.6%V, 1.5 ~ 1.8%Nb, <1.0%Si, <0.6%Mn, <0.05%P, <0.04%S, surplus be Fe and inevitably impurity time, add in molten steel account for steel quality mark 0.5 ~ 0.8% in stove metallic aluminium for component controlling, be incubated ladle of being come out of the stove to by molten steel after 4 ~ 6 minutes, nickel magnesium alloy is placed in advance at ladle bottom, nickel magnesium alloy addition accounts for injects 0.35 ~ 0.50% of steel quality mark in ladle, finally, add multicomponent alloy silk by wire feeder in ladle, multicomponent alloy silk addition accounts for 3.0 ~ 3.5% of steel quality mark in ladle, multicomponent alloy filament diameter
2. molten steel is after skimming, when temperature is down to 1430 ~ 1460 DEG C, poured in the casting mold on the centrifuge of High Rotation Speed, after pouring molten steel, high-speed steel body of roll internal layer temperature is measured by non-contact type thermodetector, when temperature is 1210 ~ 1290 DEG C, pour into roller core hi-strength nodular iron molten iron, chemical composition and the mass fraction thereof of roller core hi-strength nodular iron molten iron are: 3.4 ~ 3.8%C, 2.1 ~ 2.4%Si, 0.10 ~ 0.35%Mn, 0.20 ~ 0.35%Ni, 0.04 ~ 0.06%Mg, 0.02 ~ 0.04%RE, 0.09 ~ 0.15%Na, S<0.02%, P<0.04%, surplus is Fe and inevitable impurity, roller core hi-strength nodular iron molten steel pouring temperature is 1310 ~ 1350 DEG C, after roller core hi-strength nodular iron molten iron is poured 12 ~ 24h, take out compound high speed steel roll and enter holding furnace or burial pit,
3. compound high speed steel roll is directly carried out roughing under as cast condition, then in heating furnace, 1040 ~ 1070 DEG C are heated to, heat temperature raising speed is 15 ~ 25 DEG C/h, air-cooled after insulation 3 ~ 6h, be heated to 520 ~ 550 DEG C with the programming rate of 25 ~ 35 DEG C/h again, after insulation 8 ~ 12h, stove is chilled to less than 150 DEG C, air cooling, is finally refined to given size and precision by roll.
Chemical composition and the mass fraction thereof of nickel magnesium alloy described above are: 70 ~ 85%Ni, 15 ~ 30%Mg.
Chemical composition and the mass fraction thereof of multicomponent alloy silk described above are: 10 ~ 12%V, 1.5 ~ 2.0%N, 3 ~ 5%Ti, 2.5 ~ 4.0%Ca, 6 ~ 8%Zr, 3 ~ 5%Ce, 25 ~ 28%Si, 10 ~ 12%Cr, 2 ~ 4%K, <0.04%P, <0.03%S, surplus is Fe and inevitable impurity.
Compound high speed steel roll of the present invention compared with prior art, has the following advantages:
1) compound high speed steel roll roll surface hardness of the present invention is high, and quenching degree is good, hardened depth, ensure that roll all has fabulous wearability in whole working lining, and roll surface hardness of the present invention is more than 85HSD, and roll surface difference of hardness is less than 1.5HSD;
2) compound high speed steel roll roller core intensity of the present invention is high, guarantees to there will not be roll breakage in work roll cooling;
3) compound high speed steel roll anti-wear performance of the present invention is excellent, and its service life improves more than 4 times than high Minvar roll.
Accompanying drawing explanation
Fig. 1 roll schematic diagram of the present invention;
The 1-body of roll (wear-resistant high speed steel), 2-roller core (hi-strength nodular iron).
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described, but the present invention is not limited to following examples.
Abrasion-resistant cast compound high speed steel roll of the present invention is composited by centrifugal casting by the body of roll 1 wear-resistant high speed steel and roller core 2 hi-strength nodular iron.
Embodiment 1:
The preparation technology of abrasion-resistant cast compound high speed steel roll of the present invention is as follows:
1. the melting body of roll 1 wear-resistant high speed steel and roller core 2 hi-strength nodular iron in two 1000 kilograms of medium-frequency induction furnaces respectively, wherein the smelting process of the body of roll 1 wear-resistant high speed steel is: first by steel scrap, carburant, ferrochrome, ferrotungsten, molybdenum-iron, vanadium iron and the fusing of ferro-niobium Hybrid Heating, when liquid steel temperature reaches 1571 DEG C, sample analysis, when steel quality mark reaches 1.81%C, 4.63%Cr, 2.19%W, 5.51%Mo, 4.80%V, 1.77%Nb, 0.65%Si, 0.38%Mn, 0.039%P, 0.031%S, surplus be Fe and inevitably impurity time, add in molten steel account for steel quality mark 0.5% in stove metallic aluminium for component controlling, be incubated ladle of being come out of the stove to by molten steel after 6 minutes, nickel magnesium alloy is placed in advance at ladle bottom, chemical composition and the mass fraction thereof of nickel magnesium alloy are: 85%Ni, 15%Mg, nickel magnesium alloy addition accounts for injects 0.50% of steel quality mark in ladle, finally, in ladle, multicomponent alloy silk is added by wire feeder, chemical composition and the mass fraction thereof of multicomponent alloy silk are: 10.03%V, 1.57%N, 4.82%Ti, 2.57%Ca, 7.68%Zr, 3.02%Ce, 25.30%Si, 10.24%Cr, 2.85%K, 0.027%P, 0.019%S, surplus is Fe and inevitable impurity.Multicomponent alloy silk addition accounts for 3.0% of steel quality mark in ladle, multicomponent alloy filament diameter
2. molten steel is after skimming, when temperature is down to 1435 DEG C, poured in the casting mold on the centrifuge of High Rotation Speed, after pouring molten steel, the high-speed steel body of roll 1 internal layer temperature is measured by non-contact type thermodetector, when temperature is 1238 DEG C, pour into roller core 2 hi-strength nodular iron molten iron, chemical composition and the mass fraction thereof of roller core 2 hi-strength nodular iron molten iron are: 3.45%C, 2.38%Si, 0.27%Mn, 0.29%Ni, 0.044%Mg, 0.026%RE, 0.15%Na, 0.009%S, 0.031%P, surplus is Fe and inevitable impurity, roller core hi-strength nodular iron molten steel pouring temperature is 1347 DEG C.After roller core 2 hi-strength nodular iron molten iron is poured 12h, takes out compound high speed steel roll and enter holding furnace.
3. compound high speed steel roll is directly carried out roughing under as cast condition, then in heating furnace, 1070 DEG C are heated to, heat temperature raising speed is 25 DEG C/h, air-cooled after insulation 3h, be heated to 550 DEG C with the programming rate of 35 DEG C/h again, after insulation 8h, stove is chilled to less than 150 DEG C, air cooling, is finally refined to given size and precision by roll.Compound high speed steel roll mechanical property is in table 1.
Embodiment 2:
Abrasion-resistant cast compound high speed steel roll of the present invention is composited by centrifugal casting by the body of roll 1 wear-resistant high speed steel and roller core 2 hi-strength nodular iron.The preparation technology of abrasion-resistant cast compound high speed steel roll of the present invention is as follows:
1. the melting body of roll 1 wear-resistant high speed steel and roller core 2 hi-strength nodular iron in two 1000 kilograms of medium-frequency induction furnaces respectively, wherein the smelting process of the body of roll 1 wear-resistant high speed steel is: first by steel scrap, carburant, ferrochrome, ferrotungsten, molybdenum-iron, vanadium iron and the fusing of ferro-niobium Hybrid Heating, when liquid steel temperature reaches 1588 DEG C, sample analysis, when steel quality mark reaches 2.18%C, 5.94%Cr, 1.51%W, 6.45%Mo, 5.47%V, 1.51%Nb, 0.70%Si, 0.42%Mn, 0.044%P, 0.037%S, surplus be Fe and inevitably impurity time, add in molten steel account for steel quality mark 0.8% in stove metallic aluminium for component controlling, be incubated ladle of being come out of the stove to by molten steel after 4 minutes, nickel magnesium alloy is placed in advance at ladle bottom, chemical composition and the mass fraction thereof of nickel magnesium alloy are: 70%Ni, 30%Mg, nickel magnesium alloy addition accounts for injects 0.35% of steel quality mark in ladle, finally, in ladle, multicomponent alloy silk is added by wire feeder, chemical composition and the mass fraction thereof of multicomponent alloy silk are: 11.92%V, 1.98%N, 3.17%Ti, 3.86%Ca, 6.15%Zr, 4.85%Ce, 27.77%Si, 11.82%Cr, 3.93%K, 0.030%P, 0.017%S, surplus is Fe and inevitable impurity.Multicomponent alloy silk addition accounts for 3.5% of steel quality mark in ladle, multicomponent alloy filament diameter
2. molten steel is after skimming, when temperature is down to 1456 DEG C, poured in the casting mold on the centrifuge of High Rotation Speed, after pouring molten steel, the high-speed steel body of roll 1 internal layer temperature is measured by non-contact type thermodetector, when temperature is 1281 DEG C, pour into roller core 2 hi-strength nodular iron molten iron, chemical composition and the mass fraction thereof of roller core 2 hi-strength nodular iron molten iron are: 3.78%C, 2.13%Si, 0.19%Mn, 0.34%Ni, 0.053%Mg, 0.038%RE, 0.097%Na, 0.011%S, 0.028%P, surplus is Fe and inevitable impurity, hi-strength nodular iron molten steel pouring temperature is 1314 DEG C.After roller core 2 hi-strength nodular iron molten iron is poured 24h, takes out compound high speed steel roll and enter burial pit.
3. compound high speed steel roll is directly carried out roughing under as cast condition, then in heating furnace, 1040 DEG C are heated to, heat temperature raising speed is 15 DEG C/h, air-cooled after insulation 6h, be heated to 520 DEG C with the programming rate of 25 DEG C/h again, after insulation 12h, stove is chilled to less than 150 DEG C, air cooling, is finally refined to given size and precision by roll.Compound high speed steel roll mechanical property is in table 1.
Embodiment 3:
Abrasion-resistant cast compound high speed steel roll of the present invention is composited by centrifugal casting by the body of roll 1 wear-resistant high speed steel and roller core 2 hi-strength nodular iron.The preparation technology of abrasion-resistant cast compound high speed steel roll of the present invention is as follows:
1. the melting body of roll 1 wear-resistant high speed steel and roller core 2 hi-strength nodular iron in two 750 kilograms of medium-frequency induction furnaces respectively, wherein the smelting process of the body of roll 1 wear-resistant high speed steel is: first by steel scrap, carburant, ferrochrome, ferrotungsten, molybdenum-iron, vanadium iron and the fusing of ferro-niobium Hybrid Heating, when liquid steel temperature reaches 1583 DEG C, sample analysis, when steel quality mark reaches 1.96%C, 5.28%Cr, 1.91%W, 5.94%Mo, 5.07%V, 1.68%Nb, 0.58%Si, 0.37%Mn, 0.041%P, 0.026%S, surplus be Fe and inevitably impurity time, add in molten steel account for steel quality mark 0.65% in stove metallic aluminium for component controlling, be incubated ladle of being come out of the stove to by molten steel after 5 minutes, nickel magnesium alloy is placed in advance at ladle bottom, chemical composition and the mass fraction thereof of nickel magnesium alloy are: 70%Ni, 30%Mg, nickel magnesium alloy addition accounts for injects 0.40% of steel quality mark in ladle, finally, in ladle, multicomponent alloy silk is added by wire feeder, chemical composition and the mass fraction thereof of multicomponent alloy silk are: 11.29%V, 1.80%N, 3.86%Ti, 2.90%Ca, 6.33%Zr, 3.92%Ce, 26.64%Si, 11.25%Cr, 2.08%K, 0.021%P, 0.013%S, surplus is Fe and inevitable impurity.Multicomponent alloy silk addition accounts for 3.2% of steel quality mark in ladle, multicomponent alloy filament diameter
2. molten steel is after skimming, when temperature is down to 1447 DEG C, poured in the casting mold on the centrifuge of High Rotation Speed, after pouring molten steel, the high-speed steel body of roll 1 internal layer temperature is measured by non-contact type thermodetector, when temperature is 1253 DEG C, pour into roller core 2 hi-strength nodular iron molten iron, chemical composition and the mass fraction thereof of roller core 2 hi-strength nodular iron molten iron are: 3.59%C, 2.24%Si, 0.33%Mn, 0.21%Ni, 0.048%Mg, 0.029%RE, 0.127%Na, 0.008%S, 0.029%P, surplus is Fe and inevitable impurity, roller core hi-strength nodular iron molten steel pouring temperature is 1330 DEG C.After roller core 2 hi-strength nodular iron molten iron is poured 18h, takes out compound high speed steel roll and enter burial pit.
3. compound high speed steel roll is directly carried out roughing under as cast condition, then in heating furnace, 1050 DEG C are heated to, heat temperature raising speed is 20 DEG C/h, air-cooled after insulation 5h, be heated to 540 DEG C with the programming rate of 30 DEG C/h again, after insulation 10h, stove is chilled to less than 150 DEG C, air cooling, is finally refined to given size and precision by roll.Compound high speed steel roll mechanical property is in table 1.
Table 1 compound high speed steel roll mechanical property
Compound high speed steel roll roll surface hardness of the present invention is high, quenching degree is good, hardened depth, ensure that roll all has fabulous wearability in whole working lining, roll surface hardness of the present invention is more than 85HSD, roll surface difference of hardness is less than 1.5HSD, and compound high speed steel roll roller core intensity of the present invention is high, guarantees to there will not be roll breakage in work roll cooling.Roll of the present invention is used for bar mill finishing stand and bar and shape mill finishing stand and high-speed rod-rolling mill pre-finishing mill frame, all show excellent wearability, compound high speed steel roll of the present invention improves more than 4 times than high Minvar roll service life, apply and can alleviate labor strength, reduce stocking cost, improve stocking surface quality, and can operating rate of rolling mill be improved, apply and there is good economic and social benefit.
Claims (4)
1. a preparation method for abrasion-resistant cast compound high speed steel roll, is characterized in that, is composited, comprises the following steps by body of roll wear-resistant high speed steel and roller core hi-strength nodular iron by centrifugal casting:
1. melting body of roll wear-resistant high speed steel and roller core hi-strength nodular iron in two medium-frequency induction furnaces respectively, wherein the smelting process of body of roll wear-resistant high speed steel is: first by steel scrap, carburant, ferrochrome, ferrotungsten, molybdenum-iron, vanadium iron and the fusing of ferro-niobium Hybrid Heating, when liquid steel temperature reaches 1570 ~ 1590 DEG C, sample analysis, when steel quality mark reaches 1.8 ~ 2.2%C, 4.5 ~ 6.0%Cr, 1.5 ~ 2.2%W, 5.5 ~ 6.5%Mo, 4.8 ~ 5.6%V, 1.5 ~ 1.8%Nb, <1.0%Si, <0.6%Mn, <0.05%P, <0.04%S, surplus be Fe and inevitably impurity time, add in molten steel account for steel quality mark 0.5 ~ 0.8% in stove metallic aluminium for component controlling, be incubated ladle of being come out of the stove to by molten steel after 4 ~ 6 minutes, nickel magnesium alloy is placed in advance at ladle bottom, nickel magnesium alloy addition accounts for injects 0.35 ~ 0.50% of steel quality mark in ladle, finally, add multicomponent alloy silk by wire feeder in ladle, multicomponent alloy silk addition accounts for 3.0 ~ 3.5% of steel quality mark in ladle, multicomponent alloy filament diameter
2. molten steel is after skimming, when temperature is down to 1430 ~ 1460 DEG C, poured in the casting mold on the centrifuge of High Rotation Speed, after pouring molten steel, high-speed steel body of roll internal layer temperature is measured by non-contact type thermodetector, when temperature is 1210 ~ 1290 DEG C, pour into roller core hi-strength nodular iron molten iron, chemical composition and the mass fraction thereof of roller core hi-strength nodular iron molten iron are: 3.4 ~ 3.8%C, 2.1 ~ 2.4%Si, 0.10 ~ 0.35%Mn, 0.20 ~ 0.35%Ni, 0.04 ~ 0.06%Mg, 0.02 ~ 0.04%RE, 0.09 ~ 0.15%Na, S<0.02%, P<0.04%, surplus is Fe and inevitable impurity, roller core hi-strength nodular iron molten steel pouring temperature is 1310 ~ 1350 DEG C, after roller core hi-strength nodular iron molten iron is poured 12 ~ 24h, take out compound high speed steel roll and enter holding furnace or burial pit,
3. compound high speed steel roll is directly carried out roughing under as cast condition, then in heating furnace, 1040 ~ 1070 DEG C are heated to, heat temperature raising speed is 15 ~ 25 DEG C/h, air-cooled after insulation 3 ~ 6h, be heated to 520 ~ 550 DEG C with the programming rate of 25 ~ 35 DEG C/h again, after insulation 8 ~ 12h, stove is chilled to less than 150 DEG C, air cooling, is finally refined to given size and precision by roll.
2. according to the method for claim 1, it is characterized in that, chemical composition and the mass fraction thereof of nickel magnesium alloy are: 70 ~ 85%Ni, 15 ~ 30%Mg.
3. according to the method for claim 1, it is characterized in that, chemical composition and the mass fraction thereof of multicomponent alloy silk are: 10 ~ 12%V, 1.5 ~ 2.0%N, 3 ~ 5%Ti, 2.5 ~ 4.0%Ca, 6 ~ 8%Zr, 3 ~ 5%Ce, 25 ~ 28%Si, 10 ~ 12%Cr, 2 ~ 4%K, <0.04%P, <0.03%S, surplus is Fe and inevitable impurity.
4. according to the abrasion-resistant cast compound high speed steel roll that the either method of claim 1-3 prepares.
Priority Applications (1)
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| CN104308113B (en) * | 2014-09-24 | 2016-08-24 | 江苏共昌轧辊股份有限公司 | A kind of high-speed steel roll centrifugal composite casting method that low interface lost efficacy |
| CN105242633B (en) * | 2015-10-27 | 2018-09-21 | 浙江国正安全技术有限公司 | A kind of intelligent preparation method of alloy bar |
| JP6621650B2 (en) * | 2015-11-17 | 2019-12-18 | 株式会社フジコー | Roll for hot rolling process and manufacturing method thereof |
| CN105618715B (en) * | 2016-01-12 | 2017-11-21 | 安徽环渤湾高速钢轧辊有限公司 | A kind of wear-resistant high speed steel composite roll and preparation method thereof |
| CN105543641B (en) * | 2016-01-29 | 2017-03-15 | 山东省四方技术开发有限公司 | Particle reinforced hot rolled seamless steel tube tandem mill composite roll and preparation method thereof |
| CN111957925B (en) * | 2020-07-24 | 2021-10-29 | 枣庄光研工业科技有限公司 | Wear-resistant roller for rolling stainless steel and preparation method thereof |
| CN112743064B (en) * | 2020-12-29 | 2022-07-12 | 唐山先隆轧辊实业有限公司 | High-nitrogen high-speed steel centrifugal composite roller and preparation process thereof |
| CN114318135A (en) * | 2021-03-22 | 2022-04-12 | 武汉钜能科技有限责任公司 | Wear-resistant high-speed steel |
| CN114570903B (en) * | 2022-03-02 | 2023-07-21 | 安徽环渤湾高速钢轧辊有限公司 | Wear-resistant low-alloy high-speed steel composite roller and preparation method thereof |
| CN115319059B (en) * | 2022-08-30 | 2023-07-28 | 枣庄瑞兴机械制造有限公司 | Wear-resistant narrow strip steel roller and preparation method thereof |
| CN115896636B (en) * | 2022-12-22 | 2023-06-13 | 石家庄石特轧辊有限公司 | Preparation method of high-hardness roller |
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