CN103624084A - Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof - Google Patents
Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a resource-saving type high-boron high-speed steel composite roll and a manufacturing method of the resource-saving type high-boron high-speed steel composite roll, and belongs to the technical field of rolls. The composite roll is composed of outer-layer high-boron high-speed steel, middle transition-layer graphitic steel and roll core hot rolling medium-carbon round steel, the outer-layer high-boron high-speed steel and the middle transition-layer graphitic steel are formed in a centrifugal combination mode, and the transition-layer graphitic steel and the roll core hot rolling medium-carbon round steel are formed in a hot charging combination mode. The composite roll is high in roll face rigidity and good in rigidity uniformity, and it is guaranteed that the composite roll is excellent in abrasive resistance. A roll core is formed by machining the hot rolling medium-carbon round steel and is good in obdurability, the roll breakage accident cannot happen in the roll using process, and good economic benefits and social benefits are achieved through popularization and application.
Description
Technical field
The present invention relates to a kind of high-speed steel roll and preparation method thereof, particularly a kind of resource-conserving high-boron high-speed steel composite roller and preparation method thereof, belongs to roll technology field.
Background technology
Roll is important consumable part during steel rolling is produced, the Performance and quality of roll has directly determined the production cost of stocking, stocking surface quality and operating rate of rolling mill, the research that improves roller performance, reduction roll manufacturing cost, constantly causes domestic and international roll producer and researcher's attention.In order to improve roller performance, Chinese invention patent CN103031496A discloses a kind of cast steel roll, comprises alloy outer and core, the chemical component weight percentage of described alloy outer is: C1.50 ?2.20%, Si≤0.060%, Mn0.40 ?1.20%, P≤0.030%, S≤0.025%, Cr3.00 ?8.00%, Ni0.00 ?1.50%, Mo2.00 ?8.00%, V2.00 ?9.00%, W0.00 ?3.00%, Nb0.00 ?0.85%, Al0.00 ?1.20%, surplus is Fe; The chemical component weight percentage of described core is: C2.8 ?3.4%, Si1.8 ?2.6%, Mn0.3 ?0.6%, P≤0.08%, S≤0.03%, Mg0.04 ?0.06%.This invention adopts alloy outer and the core of mentioned component, good, the anti-accident ability of its wearability and obdurability is strong, long service life, avoid rolling accident, alloy outer and core be metallurgical binding fully, reduced the element proportional quantity that in use adverse effect is larger simultaneously, reduce production cost, improved service condition simultaneously.Chinese invention patent CN103014532A also discloses a kind of high abrasion composite roll and preparation method thereof, roll working layer adopts the tungsten carbide reinforced alloys half steel that wearability is good, have high hard phase, core of the roll adopts graphitic steel, and roll working lining tungsten carbide reinforced alloys semi-steel material and core of the roll graphitic steel material are complete metallurgical binding.The chemical component weight percentage of described roll working lining tungsten carbide reinforced alloys semi-steel material is: C1.2 ?2.1%, Si0.3 ?1.0%, Mn0.5 ?1.2%, Cr0.5 ?3.5%, Ni1.0 ?4.5%, Mo0.3 ?1.0%, P≤0.035%, S≤0.030%, WC0.1 ?5.0%, surplus is Fe; The chemical component weight percentage of described core of the roll graphitic steel material is: C1.4 ?1.8%, Si1.4 ?2.0%, Mn0.3 ?0.8%, Ni0.3 ?0.8%, Cr0.01 ?0.3%, Mo0.01 ?0.3%, P < 0.035%, S < 0.030%, surplus is Fe.Advantage is, good, the anti-accident ability of roll wearability is strong, improve online service life of roll and operating rate of rolling mill.Chinese invention patent CN103009015A also discloses the manufacture method of bimetal composite wear resistant metallurgical roller, comprise roller core procedure of processing, preheating step, built-up welding composite bed step, fine finishining step and heat treatment step, wherein: roller core procedure of processing is first with the good steel of tensile strength, yield strength and shock resistance, to pass through forging and stamping and modifier treatment, make roller core blank, then by the extremely reserved built-up welding composite bed size of roller core blank roughing; Preheating step is by the suitable weldering temperature of Preheating Core to 380 ℃ ± 5 ℃.Built-up welding composite bed step is for to fill up with submerged welding process the roller core surface after preheating by reserved built-up welding composite bed medication core welding wire built-up welding; Fine finishining step is for being machined to design size by the bimetal composite wear resistant metallurgical roller blank of heap postwelding; Heat treatment step is for to quench the bimetal composite wear resistant metallurgical roller after fine finishining and modifier treatment, the requirement of its top layer is reached antisticking wearing and tearing that possessed, anti-abrasive wear, red hardness, cold-and-heat resistent fatigability and anti-strip.Chinese invention patent CN103074539A also discloses a kind of centrifugal compound nickelic niobium wear resistant cast iron roll and casting method thereof, comprise working lining and sandwich layer, it is characterized in that, its working lining chemical composition forms: C2.9～3.6%, Si0.6～1.5%, Mn0.4～1.2%, P < 0.10%, S < 0.05%, Ni3.01～4.8%, Cr1.0～2.0%, Mo0.2～2.0%, Nb0.1～2.0%, V1.0～4.0%, W0.05～2.0%, all the other are Fe.Compared with prior art, this beneficial effect of the invention is: block abrasion-proof particle is point, block disperse distributes and is embedded in roll metallic matrix; Graphite exists with point-like form.Abrasion-proof particle disperse distributes, and is embedded in firm difficult drop-off in matrix, has greatly promoted the overall wear resistance energy of roller substrate tissue; The whole roll surface wearing of roll is even.Chinese invention patent CN103014516A also discloses a kind of boracic low-alloy high-speed steel rolls and manufacture method thereof.Described roll comprises that the body of roll and roller core two parts form, and the chemical composition of the body of roll is calculated according to percentage by weight and is: C:0.7～0.8, Cr:1.3～2.4, B:2.50～3.0, W:1.0～1.5, V:1.0～1.5, Si :≤1.0, Mn :≤0.4, Ti:0.09～0.12, Mg:0.16～0.19, RE:0.10～0.12, P :≤0.03, S≤0.03, surplus is Fe and inevitable trace impurity, and roller core is spheroidal graphite cast-iron.The manufacture method of the described roll of this invention adopts centrifugal casting for the processing of molten refining ?deoxidation alloying ?rare earth magnesium composite inoculating is rear, is more after heat treatment processed into finished product; The major advantage of this invention is that abrasion resistant particles be take boride particle as main, reduce alloying element addition, thereby reduce production costs, and hardness is high, wearability and thermal fatigue resistance good, the even later stage of material, anti-accident was strong.Chinese invention patent CN102994692A also discloses a kind of high boron high-speed steel roll material and smelting process thereof, it is characterized in that making through the following step: 1) by the mass ratio of following component, get the raw materials ready: 73.0～76.0% Q235 steel scrap, 1.5～1.8% ferrotungsten, 3.0～3.3% molybdenum-iron, 1.0～1.2% vanadium iron, 6.0～6.5% high carbon ferro-chrome, 0.5～0.8% metallic copper, 0.12～0.16% metallic aluminium, 1.2～1.4% calcium-silicon, 0.20～0.28% RE-Mg-ferrosilicon alloy, 0.3～0.5% ferro-niobium, 8.2～8.6% ferro-boron, 0.55～0.80% ferrosilicon, 0.35～0.50% VN alloy, 1.20～1.36% zirconium ferrosilicon and 0.15～0.20% ferrotianium, 2) first by the Q235 steel scrap of mass fraction 73.0～76.0%, 1.5～1.8% ferrotungsten, 3.0～3.3% molybdenum-iron, 6.0～6.5% high carbon ferro-chrome, 0.5～0.8% metallic copper and 0.3～0.5% ferro-niobium, put into electric furnace, be warming up to 1580～1600 ℃, make after mixed material heating fusing, add successively 1.2～1.4% calcium-silicon, 1.0～1.2% vanadium iron, 0.12～0.16% metallic aluminium and 3.5～4.0% ferro-boron, liquid steel temperature is risen to 1610～1630 ℃, 3) in casting ladle, adding in advance granularity is 5～10mm, and through 550～600 ℃ of preheatings 2～4 hours, mass fraction is 0.20～0.28% RE-Mg-ferrosilicon alloy, 0.15～0.20% ferrotianium, 0.66～0.80% zirconium ferrosilicon and 1.5～1.8% ferro-boron, afterwards by step 2) temperature be the molten steel of 1610～1630 ℃, pour in casting ladle, carry out composite inoculating processing and Alloying Treatment, (4) molten steel is in casting ladle standing 4～10 minutes, when liquid steel temperature is down to 1450～1475 ℃, by pouring molten steel to casting mold, and in pouring molten steel process, with stream, adding mass fraction is 0.55～0.80% ferrosilicon, 0.35～0.50% VN alloy, 0.45～0.60% zirconium ferrosilicon and 2.4～3.0% ferro-boron, after cooling, obtain high boron high-speed steel roll.Chinese invention patent CN102925820A also discloses a kind of containing aluminium high boron high-speed steel roll material and smelting process, the mass fraction % of chemical composition is: 0.35 ?0.55C, 3.2 ?3.4B, 5.5 ?6.0Cr, <0.85Si, <0.35Mn, 0.5 ?0.7V, 0.7 ?0.9Ni, 1.0 ?3.0W, 1.0 ?2.0Mo, 3.8≤(W+2Mo)≤5.2, 3.7 ?3.9Al, 0.03 ?0.06Ce, 0.03 ?0.06La, 0.06< (La+Ce)≤0.10, 0.12 ?0.15N, 0.05 ?0.08Ca, 0.04 ?0.10Mg, <0.03S, <0.04P, all the other are Fe.Utilize electro-smelting, adopt casting method moulding, fine finishining after quenching and tempering.This invention roll material room temperature and high temperature hardness are high, and high temperature abrasion resistance is good.Chinese invention patent CN102847713A also discloses a kind of wear-resistant hot rolling roller, comprise hot roll body, described inner body wall is provided with water cooling layer, and described body outer wall is coated with WC cemented carbide layer, and described WC cemented carbide layer is coated with nano ceramic coat outward.This wear-resistant hot rolling roller is owing to being coated with WC cemented carbide layer at body surface, at WC cemented carbide layer, be coated with nano ceramic coat outward, there is heat insulation and preservation effect, do not come off, do not burn, water-fast, moistureproof, and lubricant effect is better, has greatly improved mechanical performance and the chemical property of this hot roll, water cooling layer can play good cooling effect, longer service life simultaneously.Chinese invention patent CN102828123A also discloses a kind of outer rotten method of processing of centrifugal compound casting high-speed steel roll, it is characterized in that, layer high-speed steel melting outside completes while coming out of the stove, to adding in ladle composite modifier to the processing of going bad of high-speed steel molten iron, the addition of composite modifier is 1.0～2.0% of Metal Weight, and reaction temperature is 1500～1600 ℃.The chemical component weight percentage of described composite modifier is: vanadium iron FeV5050～55%, rare earth ferrosilicon alloy FeSiRe2120～25%, Si-Ba alloy FeBa5Si6020～25%, Al5～10%.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 that even dispersion distributes, has improved the outer field wear-resisting and heat resistance of high-speed steel roll, makes roll millimeter stocking increase on year-on-year basis 25%～30%.Chinese invention patent CN102626774A also discloses the manufacture method of the compound chilled cast iron roll of a kind of bimetallic, comprise that outer chilled cast iron high-abrasive material and internal layer support gray iron material melting, centrifugal casting-mould preparation, centrifugal casting, cooling, demoulding pickup operation, the matrix structure of outer chilled cast iron high-abrasive material is: carbide content 40～50%, content of pearlite in alloy 40～50%, Lay formula body burden 0～20%; Cooling velocity during centrifugal casting is: from 1350 ℃, drop to 1180 ℃ of interval cooling velocities and be controlled at and be greater than 80 ℃/min, from 1180 ℃, dropping to 720 ℃ of interval cooling velocities is 20～25 ℃/min, from 720 ℃ of cooling velocities that drop to normal temperature interval, is controlled at and is less than 30 ℃/h.The advantage of this invention is: utilize the produced outer material of roll crystal grain of the method thin and evenly, roll body hardness radially, axial stiffness changes less; Tensile strength is strong, and wearability is good, long service life.Chinese invention patent CN102615106A also discloses a kind of boracic centrifugal compound high-speed steel roll, comprise high-speed steel roll skin, high-speed steel roll intermediate layer and high-speed steel roll core, it is characterized in that, the outer field chemical component weight percentage of described high-speed steel roll is: C:0.8～0.9%, Si:1.0～1.2%, Mn:0.9～1.2%, P :≤0.03%, S :≤0.03%, Ni:0.9～1.0%, Cr:5～6%, Mo:1.4～1.5%, B:1.9～2.2%, V:1.4～1.6%, W:2～3%, Nb:0.4～0.5% and rare earth; The chemical component weight percentage in described high-speed steel roll intermediate layer is: C:1.7～1.8%, Si:1.4～1.6%, Mn:0.9～1.0%, P :≤0.03%, S :≤0.03%, Ni:0.8～1.2%, Cr:1.3～1.5% and Mo:0.3～0.5%; The chemical component weight percentage of described high-speed steel roll core is: C:3.1～3.3%, Si:1.8～2.0%, Mn:0.6～0.7%, P :≤0.1%, S :≤0.03%, Ni :≤0.3%, Cr:0.2～0.3%, Mo:0.2～0.3% and Mg:0.05～0.08%.Chinese invention patent CN102615107A also discloses a kind of high-sulfur alloy centrifugal compounded nodular graphite cast iron roller, outer and core, consists of, and it is characterized in that, described skin comprises the following ingredients forming by mass percentage: C:2.8～3.6, Si:0.8～1.9, Mn:0.6～1.3, Cr:1.5～2.8, Mo:0.4～0.8, W:0.3～0.9, Ae:0.4～0.8, V:0.1～0.5, S:1.9～3.0, P :≤0.08, Re: >=0.05, all the other are Fe; Described core comprises the following ingredients forming by mass percentage: C:3.0～3.5, Si:1.9～2.5, Mn:0.4～1.2, Cr :≤0.4, Mo :≤0.2, W :≤0.1, Ae :≤0.1, V:0.1, S:0.04, P :≤0.1, Re: >=0.05, all the other are Fe.Chinese invention patent CN102330037A also discloses a kind of alloy roller with wearability and high-fire resistance, and its contained various components based on weight percentage are: C:2.5%～3.5%; Si:< 2.0%; Mn:1.6%～2.0%; P :≤0.06%; S :≤0.05%; Cu :≤0.2%; As :≤0.10%; Cr:1.5%～2.0%; Ni:10.0%～20.0%; Mo:10.5%～15.0%; Surplus is Fe.This alloy roller with wearability and high-fire resistance, by increasing considerably the content of Ni, Mo element, has improved the heat-resistant antifriction performance of alloy roller, and has extended this and have the service life of the alloy roller of wearability and high-fire resistance.Chinese invention patent CN102366830A also discloses a kind of casting method of boron-containing roller, and the skin of described boron-containing roller adopts centre spinning method to be shaped, and roller core adopts spheroidal graphite cast-iron, and with teeming method castable; Described outer field chemical composition and percentage by weight are C:3.2～3.5%, Si:0.2～0.4%, B:1.2～1.6%, Cr:6.3～7.0%, Mn:1.6～1.8%, V:1.5～1.8%, Mo:2.2～2.8%, W:1.2～1.6%, Nb:0.1～0.3%, Ce:0.25～0.35%, Ti:0.3～0.5%, S < 0.03%, P < 0.04%, all the other are Fe; Said method comprising the steps of: 1., by ordinary scrap steel, ferrochrome, the pig iron, ferrotungsten, molybdenum-iron, the fusing of ferro-niobium Hybrid Heating, molten steel adds ferrosilicon and ferromanganese after melting clearly, before coming out of the stove, adds vanadium iron; 2. stokehold adjusting component qualified after, temperature is risen to 1560～1580 ℃, add the aluminium deoxidation that accounts for above-mentioned steel quality 0.15～0.20%, then add successively ferrotianium and ferro-boron, when liquid steel temperature reaches 1580～1600 ℃, come out of the stove; 3. cerium base rare earth is crushed to the fritter of granularity 5～7mm, after 160～200 ℃ of oven dry, is placed in casting ladle bottom, with pouring method in bag, molten steel is carried out to composite inoculating processing; 4. with centrifugal casting machine, pour into a mould skin of the roll, outer pouring molten steel temperature is 1470～1480 ℃, and when skin of the roll solidifies completely, and skin of the roll internal surface temperature is while reaching 1165～1175 ℃, cast roller core spheroidal graphite cast-iron, roller core spheroidal graphite cast-iron pouring temperature is 1340～1370 ℃; 5. roll cast was devaned after 12～24 hours, was then placed in burial pit, cut dead head, roughing after cleaning undesirable root, overlap, burr after being cooled to room temperature; 6. the roll after roughing is heat-treated, described heat treatment comprises quench hot and temper, 1000 ℃～1050 ℃ of quenching temperatures, temperature retention time 2～4 hours.During quench cooled, first spray cooling 10～20 minutes, air cooling, enters heating furnace and carries out temper for the first time during lower than 200 ℃ to roll surface temperature subsequently, 520 ℃～560 ℃ of tempering heating-up temperatures, be incubated air cooling after 5～8 hours, when roll surface temperature is during lower than 200 ℃, enter heating furnace and carry out temper for the second time, 500 ℃～540 ℃ of tempering heating-up temperatures, be incubated after 8～12 hours stove cold, after furnace temperature is lower than 200 ℃, come out of the stove, and be refined to given size.Chinese invention patent CN102319897A also discloses a kind of manufacture method of spray formed high-vanadium high-speed steel composite roller.High-vanadium high-speed steel chemical composition (mass fraction, is %): 1.7 ?1.8C, 1.2 ?1.6Si, 5.0 ?6.0Cr, 1.2 ?1.4Mo, 0.5 ?0.6Mn, 8.0 ?10.0V, surplus is Fe; Described roll roller core is nodular cast iron.This invention also discloses the preparation method of above-mentioned radiation roll: roller core is preheating to uniform temperature with induction coil, simultaneously by the melting in vaccum sensitive stove of outer high-speed steel, adopt the method for reaction-injection moulding, by high-speed steel metal liquid stream with nitrogen atomization and be deposited on combined shaping on the roller core of rotation.This composite roll outer tissue is even, eliminate thick eutectic carbide and microstructure segregation, between roller core and jetted layers, form good metallurgical binding, roll surface hardness is high, wearability is good, and fatigue behaviour improves, longer service life, along with the maturation of equipment, reaction-injection moulding composite roll has higher better economic benefit.
But above-mentioned abrasion-resistant roller technology of preparing or have complex process or exist roller performance low service life short or have the high deficiency of the many manufacturing costs of roll precious alloy addition, has limited it and has applied.
Summary of the invention
The present invention is directed to the problem that existing roll exists in producing, alloy iron filings and the steel scrap of processing roll of take is main alloy element, and supplements a small amount of ferroalloy, invents a kind of resource-conserving high-boron high-speed steel composite roller.
Object of the present invention can realize by following measures:
Resource-conserving high-boron high-speed steel composite roller of the present invention carbon round steel three parts in outer high-boron high-speed steel and intermediate layer graphitic steel and roller core hot rolling form, its ectomesoderm high-boron high-speed steel and intermediate layer graphitic steel form by centrifugal compound, and carbon round steel is composited by hot charging in transition zone graphitic steel and roller core hot rolling, its concrete preparation technology, comprises the steps:
1. first in electric furnace, adopt steel scrap, high-chromium iron-cast roller waste material, high Ni-Cr infinite cold hardness cast iron roll waste material and high-speed steel roll waste material and ferro-boron, ferrochrome, the outer high-boron high-speed steel of ferrotungsten and molybdenum-iron melting, chemical composition and the mass fraction thereof of outer high-boron high-speed steel molten steel are: 1.5～2.5%C, 0.3～1.0%B, 12～25%Cr, 0.5～3.0%Mo, 0.3～2.0%W, 0.5～1.8%Ni, 0.2～1.2%V, <1.2%Co, <1.0%Nb, <1.2%Si, <1.2%Mn, <0.08%P, <0.05%S, surplus is Fe and inevitable impurity, after outer high-boron high-speed steel molten steel composition adjustment is qualified, its temperature is risen to 1580～1600 ℃, and add and account for the calsibar alloy of steel quality mark 0.5～0.8% in stove and 0.12～0.25% metallic aluminium deoxidation and microalloying, be incubated after 2～3 minutes, by the molten steel ladle of coming out of the stove, molten steel is come out of the stove in process, by the ferrotianium of particle size 5～10mm, rare earth ferrosilicon and vanadium iron enter ladle with steel flow, ferrotianium wherein, rare earth ferrosilicon and vanadium iron addition account for respectively and enter 0.20～0.35% of the interior steel quality mark of ladle, 0.35～0.50% and 0.15～0.30%,
2. step 1. outer high-boron high-speed steel molten steel through skim and standing after, when temperature is down to 1440～1470 ℃, poured in the casting mold on the horizontal centrifuge of rotation (speed is preferably 650～1250rpm), centrifuge rotation is after 5～8 minutes, intermediate layer graphitic steel molten steel is poured into casting mold, chemical composition and the mass fraction thereof of intermediate layer graphitic steel molten steel are: 1.4～1.8%C, 1.4～2.0%Si, 0.3～0.9%Mn, 0.3～0.6%Cu, 0.03～0.06%N, 0.08～0.12%V, 0.03～0.06%RE, 0.02～0.05%Mg, 0.35～0.50%Mo, P<0.040%, S<0.035%, surplus is Fe and inevitable impurity, the pouring temperature of intermediate layer graphitic steel molten steel is 1460～1490 ℃, cast thickness is 15～25mm, after the graphitic steel molten steel solidification of intermediate layer, shut down, take out roller shell foundry goods, enter holding furnace or burial pit slowly cool to temperature lower than air cooling after 300 ℃ to room temperature,
3. step 2. gained roller shell foundry goods after roughing, be heated to 500～550 ℃, be incubated after 10～15 hours, stove is chilled to when temperature is 300～350 ℃ and comes out of the stove, compound with the roller core hot charging that carbon round steel in hot rolling processes, be combined into high-boron high-speed steel composite roller, the compound magnitude of interference of hot charging is 0.12～0.20mm, finally composite roll is refined to given size and precision.
Chemical composition and the mass fraction thereof of high-chromium iron-cast roller waste material as above are: 2.30～3.30%C, 0.30～1.00%Si, 0.50～1.20%Mn, P≤0.10%, S≤0.05%, 0.70～1.70%Ni, 18.01～22.00%Cr, 1.51～3.00%Mo, 0.00～0.60%V, surplus is Fe and inevitable impurity.
Chemical composition and the mass fraction thereof of high Minvar indefinite chill roll waste material as above are: 2.90～3.60%C, 0.60～1.50%Si, 0.40～1.20%Mn, P≤0.10%, S≤0.05%, 3.01～4.80%Ni, 1.00～2.00%Cr, 0.20～1.00%Mo, surplus is Fe and inevitable impurity.
Chemical composition and the mass fraction thereof of high-speed steel roll waste material as above are: 1.50～2.20%C, 0.30～1.00%Si, 0.40～1.20%Mn, 3.00～8.00%Cr, 0.00～1.50%Ni, 2.00～8.00%Mo, 2.00～9.00%V, 0.00～8.00%W, 0.00～8.00%Co, 0.00～5.00%Nb, P≤0.05%, S≤0.05%, surplus is Fe and inevitable impurity.
The chemical composition of calsibar alloy as above and mass fraction are: 40～45%Si, and 10～12%Ca, 10～12%Ba ,≤0.8%C ,≤0.04%P ,≤0.06%S, surplus is Fe and inevitable impurity.
The chemical composition of rare earth ferrosilicon as above and mass fraction are: 27.0～30.0%RE, and 38.0～42.0%Si, <3.0%Mn, <5.0%Ca, <3.0%Ti, surplus is Fe and inevitable impurity.
The chemical composition of vanadium iron as above and mass fraction are: 58～65%V, and≤2.0%Si ,≤2.5%Al ,≤0.06%C ,≤0.05%P ,≤0.05%S ,≤0.1%Cu, surplus is Fe and inevitable impurity.
The chemical composition of ferrotianium as above and mass fraction are: 38～42%Ti, and≤9.0%Al ,≤3.0%Si ,≤0.03%S ,≤0.03%P ,≤0.10%C ,≤0.40%Cu ,≤2.5%Mn, surplus is Fe and inevitable impurity.
Resource-conserving high-boron high-speed steel composite roller of the present invention carbon round steel three parts in outer high-boron high-speed steel and intermediate layer graphitic steel and roller core hot rolling form, and its ectomesoderm high-boron high-speed steel mainly plays wear-resisting effect.And intermediate layer employing graphitic steel is to utilize its high strength and excellent processing characteristics, outer high-boron high-speed steel and intermediate layer graphitic steel form by centrifugal compound, and both can realize firm metallurgical binding.Roller core adopts carbon round steel in hot rolling, with low cost, and can reuse.In transition zone graphitic steel and roller core hot rolling, carbon round steel is composited by hot charging, and simple process can be realized rapid batch and produce.
The present invention is in order to ensure the performance of roll, and control manufacturing cost, outer material of roll of the present invention is with steel scrap, high-chromium iron-cast roller waste material, high Ni-Cr infinite cold hardness cast iron roll waste material and high-speed steel roll waste material are main, and add appropriate ferro-boron, ferrochrome, ferrotungsten and molybdenum-iron, chemical composition and the mass fraction thereof of outer high-boron high-speed steel molten steel are: 1.5～2.5%C, 0.3～1.0%B, 12～25%Cr, 0.5～3.0%Mo, 0.3～2.0%W, 0.5～1.8%Ni, 0.2～1.2%V, <1.2%Co, <1.0%Nb, <1.2%Si, <1.2%Mn, <0.08%P, <0.05%S, surplus is Fe and inevitable impurity, can guarantee like this to have in skin of the roll tissue the wear-resistant phase of carbon boride of high rigidity, matrix be take the martensite of high rigidity as main.In order to improve outer high-boron high-speed steel steel quality, improve cladding material performance, after the present invention's floor height boron high-speed steel molten steel composition adjustment is outside qualified, its temperature is risen to 1580～1600 ℃, and add and account for the calsibar alloy of steel quality mark 0.5～0.8% in stove and 0.12～0.25% metallic aluminium deoxidation and microalloying, be incubated after 2～3 minutes, by the molten steel ladle of coming out of the stove, molten steel is come out of the stove in process, by the ferrotianium of particle size 5～10mm, rare earth ferrosilicon and vanadium iron enter ladle with steel flow, ferrotianium wherein, rare earth ferrosilicon and vanadium iron addition account for respectively and enter 0.20～0.35% of the interior steel quality mark of ladle, 0.35～0.50% and 0.15～0.30%, be conducive to like this refinement and purify solidified structure, improve the obdurability of cladding material, prevent that cladding material from occurring cracking and peeling off in using.
Chemical composition and the mass fraction thereof of intermediate layer of the present invention graphitic steel molten steel are: 1.4～1.8%C, 1.4～2.0%Si, 0.3～0.9%Mn, 0.3～0.6%Cu, 0.03～0.06%N, 0.08～0.12%V, 0.03～0.06%RE, 0.02～0.05%Mg, 0.35～0.50%Mo, P<0.040%, S<0.035%, surplus is Fe and inevitable impurity, can guarantee that like this intermediate layer has high strength and high tenacity, is conducive to improve the security that roll uses.
The skin of composite roll of the present invention and intermediate layer are after roughing, be heated to 500～550 ℃, be incubated after 10～15 hours, mainly in order to eliminate stress, stabilizing tissue and force austenite in as cast condition matrix to be converted into the martensite of high rigidity, is conducive to further improve roll wearability.The skin of composite roll and intermediate layer stove are chilled to when temperature is 300～350 ℃ and come out of the stove, can guarantee that to realize hot charging compound with the roller core that carbon round steel processes in hot rolling, be combined into high-boron high-speed steel composite roller, the compound magnitude of interference of hot charging is 0.12～0.20mm, can guarantee to there will not be the accident of press-offing in roll use procedure.
The present invention compared with prior art, has following advantage:
1) composite roll of the present invention carbon round steel three parts in outer high-boron high-speed steel and intermediate layer graphitic steel and roller core hot rolling form, and make roll use safety;
2) outer material of roll of the present invention be take steel scrap, high-chromium iron-cast roller waste material, high Ni-Cr infinite cold hardness cast iron roll waste material and high-speed steel roll waste material as main, and adds appropriate ferro-boron, ferrochrome, ferrotungsten and molybdenum-iron, is conducive to significantly reduce roll production cost;
3) roller core of roll of the present invention carbon round steel in hot rolling processes, and can reuse;
4) roll barrel hardness of the present invention is greater than 83HSD, has excellent wearability.
Accompanying drawing explanation
Fig. 1 high-boron high-speed steel composite roller schematic diagram;
1 ?carbon round steel in roller core hot rolling, 2 ?outer high-boron high-speed steel, 3 ?intermediate layer graphitic steel.
The specific embodiment
Below in conjunction with embodiment, the present invention is further described, Fig. 1 is shown in by high-boron high-speed steel composite roller schematic diagram, but the present invention is not limited to following examples.
Embodiment 1:
Resource-conserving high-boron high-speed steel composite roller (barrel length 600mm of the present invention, barrel diameter 320mm) in outer high-boron high-speed steel and intermediate layer graphitic steel and roller core hot rolling, carbon round steel three parts form, its ectomesoderm high-boron high-speed steel and intermediate layer graphitic steel adopt respectively 1000 kilograms and 500 kilograms of medium-frequency induction furnace meltings, by horizontal centrifuge, be composited, and in transition zone graphitic steel and roller core hot rolling, carbon round steel is composited by hot charging.Its concrete preparation technology is:
1. first in electric furnace, adopt steel scrap, (chemical composition and the mass fraction thereof of high-chromium iron-cast roller waste material are high-chromium iron-cast roller waste material: 2.30～3.30%C, 0.30～1.00%Si, 0.50～1.20%Mn, P≤0.10%, S≤0.05%, 0.70～1.70%Ni, 18.01～22.00%Cr, 1.51～3.00%Mo, 0.00～0.60%V, surplus is Fe and inevitable impurity), (chemical composition and the mass fraction thereof of high Minvar indefinite chill roll waste material are high Ni-Cr infinite cold hardness cast iron roll waste material: 2.90～3.60%C, 0.60～1.50%Si, 0.40～1.20%Mn, P≤0.10%, S≤0.05%, 3.01～4.80%Ni, 1.00～2.00%Cr, 0.20～1.00%Mo, surplus is Fe and inevitable impurity) and high-speed steel roll waste material (chemical composition and the mass fraction thereof of high-speed steel roll waste material are: 1.50～2.20%C, 0.30～1.00%Si, 0.40～1.20%Mn, 3.00～8.00%Cr, 0.00～1.50%Ni, 2.00～8.00%Mo, 2.00～9.00%V, 0.00～8.00%W, 0.00～8.00%Co, 0.00～5.00%Nb, P≤0.05%, S≤0.05%, surplus is Fe and inevitable impurity) and ferro-boron, ferrochrome, the outer high-boron high-speed steel of ferrotungsten and molybdenum-iron melting, chemical composition and the mass fraction thereof of outer high-boron high-speed steel molten steel are: 1.53%C, 0.99%B, 14.77%Cr, 1.16%Mo, 0.38%W, 0.75%Ni, 0.29%V, 0.78%Co, 0.03%Nb, 0.64%Si, 0.70%Mn, 0.057%P, 0.041%S, surplus is Fe and inevitable impurity.After outer high-boron high-speed steel molten steel composition adjustment is qualified, its temperature is risen to 1582 ℃, and add and account for the calsibar alloy of steel quality mark 0.5% in stove (chemical composition of calsibar alloy and mass fraction are: 42.08%Si, 11.69%Ca, 11.30%Ba, 0.28%C, 0.037%P, 0.046%S, surplus is Fe and inevitable impurity) and 0.25% metallic aluminium deoxidation and microalloying, be incubated after 3 minutes, by the molten steel ladle of coming out of the stove, molten steel is come out of the stove in process, by the ferrotianium of particle size 5～10mm, (chemical composition of ferrotianium and mass fraction are: 39.66%Ti, 5.08%Al, 1.93%Si, 0.021%S, 0.028%P, 0.07%C, 0.28%Cu, 1.27%Mn, surplus is Fe and inevitable impurity), (chemical composition of rare earth ferrosilicon and mass fraction are rare earth ferrosilicon: 28.95%RE, 39.90%Si, 1.81%Mn, 2.67%Ca, 1.04%Ti, surplus is Fe and inevitable impurity) and vanadium iron (chemical composition of vanadium iron and mass fraction are: 62.80%V, 1.26%Si, 1.99%Al, 0.05%C, 0.037%P, 0.029%S, 0.03%Cu, surplus is Fe and inevitable impurity) with steel flow, enter ladle, ferrotianium wherein, rare earth ferrosilicon and vanadium iron addition account for respectively and enter 0.20% of the interior steel quality mark of ladle, 0.35% and 0.30%.
2. outer high-boron high-speed steel molten steel through skim and standing after, when temperature is down to 1445 ℃, poured in the casting mold on the horizontal centrifuge that rotary speed is 1050rpm, centrifuge rotation, after 5 minutes, pours into casting mold by intermediate layer graphitic steel molten steel, and chemical composition and the mass fraction thereof of intermediate layer graphitic steel molten steel are: 1.42%C, 1.97%Si, 0.30%Mn, 0.59%Cu, 0.03%N, 0.08%V, 0.06%RE, 0.04%Mg, 0.39%Mo, 0.037%P, 0.030%S, surplus is Fe and inevitable impurity.The pouring temperature of intermediate layer graphitic steel molten steel is 1488 ℃, and cast thickness is 15mm.After the graphitic steel molten steel solidification of intermediate layer, shut down, take out roller shell foundry goods, enter holding furnace slowly cool to temperature lower than air cooling after 300 ℃ to room temperature.
3. roller shell foundry goods is after roughing, be heated to 520 ℃, be incubated after 12 hours, stove is chilled to when temperature is 320 ℃ and comes out of the stove, compound with the roller core hot charging that carbon round steel in hot rolling processes, be combined into high-boron high-speed steel composite roller, the compound magnitude of interference of hot charging is 0.12mm, finally composite roll is refined to given size and precision, the performance of high-boron high-speed steel composite roller is in Table 1.
Embodiment 2:
Resource-conserving high-boron high-speed steel composite roller (barrel length 600mm of the present invention, barrel diameter 350mm) in outer high-boron high-speed steel and intermediate layer graphitic steel and roller core hot rolling, carbon round steel three parts form, its ectomesoderm high-boron high-speed steel and intermediate layer graphitic steel adopt respectively 1000 kilograms and 500 kilograms of medium-frequency induction furnace meltings, by horizontal centrifuge, be composited, and in transition zone graphitic steel and roller core hot rolling, carbon round steel is composited by hot charging.Its concrete preparation technology is:
1. first in electric furnace, adopt steel scrap, (chemical composition and the mass fraction thereof of high-chromium iron-cast roller waste material are high-chromium iron-cast roller waste material: 2.30～3.30%C, 0.30～1.00%Si, 0.50～1.20%Mn, P≤0.10%, S≤0.05%, 0.70～1.70%Ni, 18.01～22.00%Cr, 1.51～3.00%Mo, 0.00～0.60%V, surplus is Fe and inevitable impurity), (chemical composition and the mass fraction thereof of high Minvar indefinite chill roll waste material are high Ni-Cr infinite cold hardness cast iron roll waste material: 2.90～3.60%C, 0.60～1.50%Si, 0.40～1.20%Mn, P≤0.10%, S≤0.05%, 3.01～4.80%Ni, 1.00～2.00%Cr, 0.20～1.00%Mo, surplus is Fe and inevitable impurity) and high-speed steel roll waste material (chemical composition and the mass fraction thereof of high-speed steel roll waste material are: 1.50～2.20%C, 0.30～1.00%Si, 0.40～1.20%Mn, 3.00～8.00%Cr, 0.00～1.50%Ni, 2.00～8.00%Mo, 2.00～9.00%V, 0.00～8.00%W, 0.00～8.00%Co, 0.00～5.00%Nb, P≤0.05%, S≤0.05%, surplus is Fe and inevitable impurity) and ferro-boron, ferrochrome, the outer high-boron high-speed steel of ferrotungsten and molybdenum-iron melting, chemical composition and the mass fraction thereof of outer high-boron high-speed steel molten steel are: 2.48%C, 0.33%B, 22.13%Cr, 0.51%Mo, 0.37%W, 1.76%Ni, 1.19%V, 0.03%Co, 0.27%Nb, 0.92%Si, 1.03%Mn, 0.063%P, 0.039%S, surplus is Fe and inevitable impurity.After outer high-boron high-speed steel molten steel composition adjustment is qualified, its temperature is risen to 1597 ℃, and add and account for the calsibar alloy of steel quality mark 0.8% in stove (chemical composition of calsibar alloy and mass fraction are: 42.08%Si, 11.69%Ca, 11.30%Ba, 0.28%C, 0.037%P, 0.046%S, surplus is Fe and inevitable impurity) and 0.12% metallic aluminium deoxidation and microalloying, be incubated after 2 minutes, by the molten steel ladle of coming out of the stove, molten steel is come out of the stove in process, by the ferrotianium of particle size 5～10mm, (chemical composition of ferrotianium and mass fraction are: 39.66%Ti, 5.08%Al, 1.93%Si, 0.021%S, 0.028%P, 0.07%C, 0.28%Cu, 1.27%Mn, surplus is Fe and inevitable impurity), (chemical composition of rare earth ferrosilicon and mass fraction are rare earth ferrosilicon: 28.95%RE, 39.90%Si, 1.81%Mn, 2.67%Ca, 1.04%Ti, surplus is Fe and inevitable impurity) and vanadium iron (chemical composition of vanadium iron and mass fraction are: 62.80%V, 1.26%Si, 1.99%Al, 0.05%C, 0.037%P, 0.029%S, 0.03%Cu, surplus is Fe and inevitable impurity) with steel flow, enter ladle, ferrotianium wherein, rare earth ferrosilicon and vanadium iron addition account for respectively and enter 0.35% of the interior steel quality mark of ladle, 0.50% and 0.15%.
2. outer high-boron high-speed steel molten steel through skim and standing after, when temperature is down to 1467 ℃, poured in the casting mold on the horizontal centrifuge that rotary speed is 900rpm, centrifuge rotation, after 8 minutes, pours into casting mold by intermediate layer graphitic steel molten steel, and chemical composition and the mass fraction thereof of intermediate layer graphitic steel molten steel are: 1.77%C, 1.40%Si, 0.76%Mn, 0.31%Cu, 0.06%N, 0.12%V, 0.03%RE, 0.02%Mg, 0.36%Mo, 0.035%P, 0.027%S, surplus is Fe and inevitable impurity.The pouring temperature of intermediate layer graphitic steel molten steel is 1462 ℃, and cast thickness is 20mm.After the graphitic steel molten steel solidification of intermediate layer, shut down, take out roller shell foundry goods, enter burial pit slowly cool to temperature lower than air cooling after 300 ℃ to room temperature.
3. roller shell foundry goods is after roughing, be heated to 500 ℃, be incubated after 15 hours, stove is chilled to when temperature is 350 ℃ and comes out of the stove, compound with the roller core hot charging that carbon round steel in hot rolling processes, be combined into high-boron high-speed steel composite roller, the compound magnitude of interference of hot charging is 0.16mm, finally composite roll is refined to given size and precision, the performance of high-boron high-speed steel composite roller is in Table 1.
Embodiment 3:
Resource-conserving high-boron high-speed steel composite roller (barrel length 650mm of the present invention, barrel diameter 380mm) in outer high-boron high-speed steel and intermediate layer graphitic steel and roller core hot rolling, carbon round steel three parts form, its ectomesoderm high-boron high-speed steel and intermediate layer graphitic steel adopt respectively 1000 kilograms and 500 kilograms of medium-frequency induction furnace meltings, by horizontal centrifuge, be composited, and in transition zone graphitic steel and roller core hot rolling, carbon round steel is composited by hot charging.Its concrete preparation technology is:
1. first in electric furnace, adopt steel scrap, (chemical composition and the mass fraction thereof of high-chromium iron-cast roller waste material are high-chromium iron-cast roller waste material: 2.30～3.30%C, 0.30～1.00%Si, 0.50～1.20%Mn, P≤0.10%, S≤0.05%, 0.70～1.70%Ni, 18.01～22.00%Cr, 1.51～3.00%Mo, 0.00～0.60%V, surplus is Fe and inevitable impurity), (chemical composition and the mass fraction thereof of high Minvar indefinite chill roll waste material are high Ni-Cr infinite cold hardness cast iron roll waste material: 2.90～3.60%C, 0.60～1.50%Si, 0.40～1.20%Mn, P≤0.10%, S≤0.05%, 3.01～4.80%Ni, 1.00～2.00%Cr, 0.20～1.00%Mo, surplus is Fe and inevitable impurity) and high-speed steel roll waste material (chemical composition and the mass fraction thereof of high-speed steel roll waste material are: 1.50～2.20%C, 0.30～1.00%Si, 0.40～1.20%Mn, 3.00～8.00%Cr, 0.00～1.50%Ni, 2.00～8.00%Mo, 2.00～9.00%V, 0.00～8.00%W, 0.00～8.00%Co, 0.00～5.00%Nb, P≤0.05%, S≤0.05%, surplus is Fe and inevitable impurity) and ferro-boron, ferrochrome, the outer high-boron high-speed steel of ferrotungsten and molybdenum-iron melting, chemical composition and the mass fraction thereof of outer high-boron high-speed steel molten steel are: 1.90%C, 0.85%B, 12.35%Cr, 2.89%Mo, 1.04%W, 0.59%Ni, 0.21%V, 0.08%Co, 0.01%Nb, 0.71%Si, 0.50%Mn, 0.047%P, 0.032%S, surplus is Fe and inevitable impurity.After outer high-boron high-speed steel molten steel composition adjustment is qualified, its temperature is risen to 1593 ℃, and add and account for the calsibar alloy of steel quality mark 0.6% in stove (chemical composition of calsibar alloy and mass fraction are: 42.08%Si, 11.69%Ca, 11.30%Ba, 0.28%C, 0.037%P, 0.046%S, surplus is Fe and inevitable impurity) and 0.18% metallic aluminium deoxidation and microalloying, be incubated after 3 minutes, by the molten steel ladle of coming out of the stove, molten steel is come out of the stove in process, by the ferrotianium of particle size 5～10mm, (chemical composition of ferrotianium and mass fraction are: 39.66%Ti, 5.08%Al, 1.93%Si, 0.021%S, 0.028%P, 0.07%C, 0.28%Cu, 1.27%Mn, surplus is Fe and inevitable impurity), (chemical composition of rare earth ferrosilicon and mass fraction are rare earth ferrosilicon: 28.95%RE, 39.90%Si, 1.81%Mn, 2.67%Ca, 1.04%Ti, surplus is Fe and inevitable impurity) and vanadium iron (chemical composition of vanadium iron and mass fraction are: 62.80%V, 1.26%Si, 1.99%Al, 0.05%C, 0.037%P, 0.029%S, 0.03%Cu, surplus is Fe and inevitable impurity) with steel flow, enter ladle, ferrotianium wherein, rare earth ferrosilicon and vanadium iron addition account for respectively and enter 0.25% of the interior steel quality mark of ladle, 0.40% and 0.25%.
2. outer high-boron high-speed steel molten steel through skim and standing after, when temperature is down to 1457 ℃, poured in the casting mold on the horizontal centrifuge that rotary speed is 700rpm, centrifuge rotation, after 6 minutes, pours into casting mold by intermediate layer graphitic steel molten steel, and chemical composition and the mass fraction thereof of intermediate layer graphitic steel molten steel are: 1.67%C, 1.70%Si, 0.62%Mn, 0.45%Cu, 0.04%N, 0.09%V, 0.05%RE, 0.04%Mg, 0.41%Mo, 0.030%P, 0.031%S, surplus is Fe and inevitable impurity.The pouring temperature of intermediate layer graphitic steel molten steel is 1476 ℃, and cast thickness is 25mm.After the graphitic steel molten steel solidification of intermediate layer, shut down, take out roller shell foundry goods, enter burial pit slowly cool to temperature lower than air cooling after 300 ℃ to room temperature.
3. roller shell foundry goods is after roughing, be heated to 550 ℃, be incubated after 12 hours, stove is chilled to when temperature is 300 ℃ and comes out of the stove, compound with the roller core hot charging that carbon round steel in hot rolling processes, be combined into high-boron high-speed steel composite roller, the compound magnitude of interference of hot charging is 0.20mm, finally composite roll is refined to given size and precision, the performance of high-boron high-speed steel composite roller is in Table 1.
The performance of table 1 high-boron high-speed steel composite roller
High-boron high-speed steel composite roller roll surface hardness of the present invention is high, and difference of hardness is little, and roll surface uniformity of hardness is good, has guaranteed that composite roll has excellent wearability.Roller core carbon round steel in hot rolling processes, there is good obdurability, can guarantee that roll produces without roll breakage accident in using, roll of the present invention uses on bar, wire rod and strip-mill strip, and increase substantially service life than high-chromium iron-cast roller and high Ni-Cr infinite cold hardness cast iron roll.Roll of the present invention, take steel scrap, high-chromium iron-cast roller waste material, high Ni-Cr infinite cold hardness cast iron roll waste material and high-speed steel roll waste material as main, has the advantage that significantly economizes on resources, and applies and has significant economic and social benefit.
Claims (10)
1. the preparation method of a resource-conserving high-boron high-speed steel composite roller, it is characterized in that, this composite roll carbon round steel three parts in outer high-boron high-speed steel and intermediate layer graphitic steel and roller core hot rolling form, its ectomesoderm high-boron high-speed steel and intermediate layer graphitic steel form by centrifugal compound, and carbon round steel is composited by hot charging in transition zone graphitic steel and roller core hot rolling, its concrete preparation technology comprises the following steps:
1. first in electric furnace, adopt steel scrap, high-chromium iron-cast roller waste material, high Ni-Cr infinite cold hardness cast iron roll waste material and high-speed steel roll waste material and ferro-boron, ferrochrome, the outer high-boron high-speed steel of ferrotungsten and molybdenum-iron melting, chemical composition and the mass fraction thereof of outer high-boron high-speed steel molten steel are: 1.5～2.5%C, 0.3～1.0%B, 12～25%Cr, 0.5～3.0%Mo, 0.3～2.0%W, 0.5～1.8%Ni, 0.2～1.2%V, <1.2%Co, <1.0%Nb, <1.2%Si, <1.2%Mn, <0.08%P, <0.05%S, surplus is Fe and inevitable impurity, after outer high-boron high-speed steel molten steel composition adjustment is qualified, its temperature is risen to 1580～1600 ℃, and add and account for the calsibar alloy of steel quality mark 0.5～0.8% in stove and 0.12～0.25% metallic aluminium deoxidation and microalloying, be incubated after 2～3 minutes, by the molten steel ladle of coming out of the stove, molten steel is come out of the stove in process, by the ferrotianium of particle size 5～10mm, rare earth ferrosilicon and vanadium iron enter ladle with steel flow, ferrotianium wherein, rare earth ferrosilicon and vanadium iron addition account for respectively and enter 0.20～0.35% of the interior steel quality mark of ladle, 0.35～0.50% and 0.15～0.30%,
2. step 1. outer high-boron high-speed steel molten steel through skim and standing after, when temperature is down to 1440～1470 ℃, poured in the casting mold on the horizontal centrifuge of rotation, centrifuge rotation is after 5～8 minutes, intermediate layer graphitic steel molten steel is poured into casting mold, chemical composition and the mass fraction thereof of intermediate layer graphitic steel molten steel are: 1.4～1.8%C, 1.4～2.0%Si, 0.3～0.9%Mn, 0.3～0.6%Cu, 0.03～0.06%N, 0.08～0.12%V, 0.03～0.06%RE, 0.02～0.05%Mg, 0.35～0.50%Mo, P<0.040%, S<0.035%, surplus is Fe and inevitable impurity, the pouring temperature of intermediate layer graphitic steel molten steel is 1460～1490 ℃, cast thickness is 15～25mm, after the graphitic steel molten steel solidification of intermediate layer, shut down, take out roller shell foundry goods, enter holding furnace or burial pit slowly cool to temperature lower than air cooling after 300 ℃ to room temperature,
3. step 2. gained roller shell foundry goods after roughing, be heated to 500～550 ℃, be incubated after 10～15 hours, stove is chilled to when temperature is 300～350 ℃ and comes out of the stove, compound with the roller core hot charging that carbon round steel in hot rolling processes, be combined into high-boron high-speed steel composite roller, the compound magnitude of interference of hot charging is 0.12～0.20mm, finally composite roll is refined to given size and precision.
2. according to the method for claim 1, it is characterized in that, chemical composition and the mass fraction thereof of high-chromium iron-cast roller waste material are: 2.30～3.30%C, 0.30～1.00%Si, 0.50～1.20%Mn, P≤0.10%, S≤0.05%, 0.70～1.70%Ni, 18.01～22.00%Cr, 1.51～3.00%Mo, 0.00～0.60%V, surplus is Fe and inevitable impurity.
3. according to the method for claim 1, it is characterized in that, chemical composition and the mass fraction thereof of high Minvar indefinite chill roll waste material are: 2.90～3.60%C, 0.60～1.50%Si, 0.40～1.20%Mn, P≤0.10%, S≤0.05%, 3.01～4.80%Ni, 1.00～2.00%Cr, 0.20～1.00%Mo, surplus is Fe and inevitable impurity.
4. according to the method for claim 1, it is characterized in that, chemical composition and the mass fraction thereof of high-speed steel roll waste material are: 1.50～2.20%C, 0.30～1.00%Si, 0.40～1.20%Mn, 3.00～8.00%Cr, 0.00～1.50%Ni, 2.00～8.00%Mo, 2.00～9.00%V, 0.00～8.00%W, 0.00～8.00%Co, 0.00～5.00%Nb, P≤0.05%, S≤0.05%, surplus is Fe and inevitable impurity.
5. according to the method for claim 1, it is characterized in that, the chemical composition of calsibar alloy and mass fraction are: 40～45%Si, and 10～12%Ca, 10～12%Ba ,≤0.8%C ,≤0.04%P ,≤0.06%S, surplus is Fe and inevitable impurity.
6. according to the method for claim 1, it is characterized in that, the chemical composition of rare earth ferrosilicon and mass fraction are: 27.0～30.0%RE, 38.0～42.0%Si, <3.0%Mn, <5.0%Ca, <3.0%Ti, surplus is Fe and inevitable impurity.
7. according to the method for claim 1, it is characterized in that, the chemical composition of vanadium iron and mass fraction are: 58～65%V, and≤2.0%Si ,≤2.5%Al ,≤0.06%C ,≤0.05%P ,≤0.05%S ,≤0.1%Cu, surplus is Fe and inevitable impurity.
8. according to the method for claim 1, it is characterized in that, the chemical composition of ferrotianium and mass fraction are: 38～42%Ti, and≤9.0%Al ,≤3.0%Si ,≤0.03%S ,≤0.03%P ,≤0.10%C ,≤0.40%Cu ,≤2.5%Mn, surplus is Fe and inevitable impurity.
9. according to the method for claim 1, it is characterized in that, the rotary speed of step (2) centrifuge is 650～1250rpm.
According to claim 1 ?the high-boron high-speed steel composite roller for preparing of 9 either method.
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| CN104148399B (en) * | 2014-06-16 | 2016-06-22 | 枣庄瑞兴机械制造有限公司 | For abrasion-resistant roller of mill stand and preparation method thereof in steel rolling |
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| CN106488811B (en) * | 2014-06-24 | 2019-05-17 | 施泰因霍夫有限及开名合伙公司 | The manufacturing method of roll and the roll of hot rolling or cold rolling for metal plate product |
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