CN104264043B - A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof - Google Patents

A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof Download PDF

Info

Publication number
CN104264043B
CN104264043B CN201410537913.7A CN201410537913A CN104264043B CN 104264043 B CN104264043 B CN 104264043B CN 201410537913 A CN201410537913 A CN 201410537913A CN 104264043 B CN104264043 B CN 104264043B
Authority
CN
China
Prior art keywords
layer
roll
speed steel
steel
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201410537913.7A
Other languages
Chinese (zh)
Other versions
CN104264043A (en
Inventor
赵立波
刘杰兵
孙建勋
丁坤飞
李义良
张群兴
李群锁
吴延祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XINGTAI DELONG MACHINERY & MILL ROLL Co Ltd
Original Assignee
XINGTAI DELONG MACHINERY & MILL ROLL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by XINGTAI DELONG MACHINERY & MILL ROLL Co Ltd filed Critical XINGTAI DELONG MACHINERY & MILL ROLL Co Ltd
Priority to CN201410537913.7A priority Critical patent/CN104264043B/en
Publication of CN104264043A publication Critical patent/CN104264043A/en
Application granted granted Critical
Publication of CN104264043B publication Critical patent/CN104264043B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof, belongs to roll manufacturing technology field.Roll of the present invention is combined into one by outer layer, intermediate layer and three part of roller core.The chemical composition of outer layer high-speed steel molten steel and its mass fraction are controlled in 1.60~2.40%C, 0.3~1.0%Mn, 0.3~1.2%Si, 4.0~6.5%Cr, 4.0~6.5%Mo, 3.0~6.5%V, 3.0~5.0%W, 1.0~4.0%Nb, 0.3~1.5%Ni, S<0.03%, P<0.03%, 0.06~0.12%Ti, surplus Fe.Roll Jing centrifugal casting combined shapings, quenching and after being tempered, with hardness is high and the features such as good wearability, popularization and application have good economic and social benefit.

Description

A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof
Technical field
The invention discloses a kind of composite roll and preparation method thereof, more particularly to a kind of centrifugal casting wear-resistant high speed steel is again Roll and preparation method thereof is closed, belongs to roll manufacturing technology field.
Background technology
Roll is important consumption spare part in Rolling production, and a large amount of consumption of roll cause the huge wave of resource and the energy Take.Particularly in hot rolling production process, roll working condition is extremely harsh, will not only have good wearability, will also have excellent Resistance to high temperature oxidation and crack propagation of thermal fatigue ability, traditional high adamite, half steel and high-chromium iron-cast roller are difficult Meet its requirement.High-speed steel roll is the good substitution material of hot roll, has been developed for various high-speed steel rolls at present both at home and abroad Material and its technology of preparing.China side patent CN 103805902 discloses a kind of Cutting free high-speed steel roll of centrifugal casting Manufacturing process, it is characterised in that comprising following processing step:1. body of roll material chemical composition adopts phosphorus content 1.2-2.8%, silicon Content 1.2-2.5%, manganese content 0.3-0.8%, phosphorus content are less than 0.05%, and sulfur content is less than 0.04%, remaining alloying element W, Mo, V, Cr, Nb, Ti, Ni, Al be respectively 2-6%, 2-6%, 2-7%, 3-5%, 0.3-1.5%, 0.1-0.5%, 0-2%, 0-4% materials, to obtain the high speed steel substrate containing graphite in ensureing centrifugal casting state and subsequent heat treatment process;2. mould Tool parameter swage thickness/outer layer molten iron casting thickness G T.GT.GT 1.25, the allowance 25-40mm of diameter, the allowance 30- of length 50mm, wall thickness 120-220mm, to determine mould external diameter;For the roll of different-diameter, the external diameter of mould and rim of the mouth formation system Row, are easy to make and end cap are exchanged;The mold thickness 30-120mm of under casing, rising head case internal diameter, wall thickness 40-60mm;End cap, swage, Under casing, rising head chest form series for different-diameter roll, are easy to exchange;End cap appearance, under casing appearance, rising head appearance diameter Direction allowance 20-40mm, pattern draft are 30 ' -2 °;Swage Jing coating, precoated sand coating after, be baked to 150 DEG C- 250 DEG C, place, prepare cast;3. the graphitization processing of working lining high speed molten steel is smelting, reaches cast temperature Degree requires the working lining molten metal with component requirements, and using Ca-Mg-Re-Si-Ti composite inoculants, addition is molten steel amount 0.15-0.25%, mass ratio, lumpiness 3-12mm place bag bottom before tapping;4. the spheroidising nodularization of core ductile cast iron material 1.7-2.1% of the dosage for iron water amount, mass ratio, lumpiness 5-15mm place bag bottom before tapping a blast furnace, instant inoculation amount is iron water amount 0.10-0.30%, lumpiness 1-5mm are added with stream during cast;5. pouring temperature outer layer pouring temperature 1460-1520 DEG C, core are poured Note temperature 1370-1430 DEG C;6. centrifuge speed:300-800 rev/min;7. the cooling parameter type of cooling:Natural cooling in mould; Cool time, 18-48 hours, unpacked during 150 DEG C of mould temperature <;8. heat-treatment of annealing technique:Programming rate, is incubated at 350 DEG C respectively 2h, 650 DEG C of scopes are incubated 2h, come out of the stove after 840 DEG C of insulation 3-8h, are cooled to less than 300 DEG C and load quenching in glowing furnace immediately;Quench Ignition technique:Programming rate, is incubated 2h respectively at 350 DEG C, and 650-860 DEG C of scope is incubated 2h, goes out after 1000-1050 DEG C of insulation 3-8h Stove, roll rotation air cooling or spraying, are cooled to less than 300 DEG C and load the stove inside holding tempering that furnace temperature is 300 DEG C immediately;Temperer Skill:Tempering for the first time is carried out after quenching immediately, is cooled to less than 80 DEG C, in temperature-rise period, when≤350 DEG C before second is tempered 15 DEG C/h, as≤530 DEG C of 20 DEG C/h, it is incubated 2h, 530 DEG C of -550 DEG C of insulation 3-8h respectively at 350 DEG C, then cools to the furnace Less than 200 DEG C are come out of the stove.The beneficial effect of the invention is:The Cutting free high-speed steel of production is improved in terms of processing characteristics, High-speed steel roll difficulty of processing and process-cycle can be reduced, man-hour and cutter is saved, with significant economic benefit;With carbonization During boron tool sharpening Cutting free high-speed steel roll in the case of workpiece linear velocity 20m, bite brings up to 3- from original 2mm 5mm;Feed brings up to 0.4-0.5mm/r from original 0.2mm/r.China side patent CN 103624230 also discloses one The method for planting the outer Centrifugal Cast High Speed Steel Roll off field of combination.In high-speed steel roll rotating centrifugal casting process, outside mold Set pulse formula magnetic field, frequency 10-20Hz of Pulsed Magnetic, pulse width make the magnetic strength in casting mold centre in 15-25 μ s Intensity is answered in 0.01-0.7T, meanwhile, an electrode is respectively mounted at mold two ends, solidified to being in during spun casting Metal in journey is passed through galvanic current stream, and the electric current density of DC current is 0.1-10A/m2, using Pulsed Magnetic and In rotation mold inner metal liquid, the reciprocal action of DC current separates out hard phase in changing high-speed steel roll process of setting at a high speed Form, and the distribution of the effect control hard phase using centrifugal casting.The invention combine Pulsed Magnetic, it is magneto-electric coupled and from The technical advantage of heart rotational casting, can significantly improve the solidified inside tissue of high-speed steel roll, increase substantially the life-span of roll And performance.China side patent CN 103317115 also discloses a kind of manufacture method of compound high speed steel roll, including Following steps:The component requirements of the high-speed steel roll of melting are placed in raw material in intermediate frequency furnace and carry out melting as needed;Stove Pre-treatment;Using three layers of compound and centrifuging process cast roll;Roughing;Heat treatment;Polish;Wherein, the melting includes Outer layer molten steel is smelted, the fusing of metallic intermediate layer liquid and core molten iron are melted, and the heat treatment includes quenching and tempering process, described Tempering process is 400-450 DEG C and is incubated 10-15 hours, then air cooling of coming out of the stove after cooling to less than 100 DEG C with the furnace.By above-mentioned side Formula, the invention can solve the problem that the problem for being difficult to combine between outer layer and core unlike material, realize the transition bonding in intermediate layer, tool There are fabulous wearability and higher hardness, it is ensured that roll surface quality.China side patent CN 103305775 also discloses one High carbon high speed steel roll is planted, including the following ingredients for constituting 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%, remaining is Fe and inevitable trace element.By the way, the high carbon high speed steel roll of the invention can be carried High wear resistance and thermal fatigue resistance.China side patent CN 102828123 also discloses a kind of centrifugal compound casting high-speed steel The method of skin of the roll Metamorphism treatment, it is characterised in that when the melting of layer high-speed steel completes to come out of the stove outside, adds into ladle compound Alterant carries out Metamorphism treatment to high speed steel water, and the addition of composite modifier is the 1.0~2.0% of Metal Weight, reaction Temperature is 1500~1600 DEG C.The chemical component weight percentage ratio of the composite modifier is:It is vanadium iron FeV5050~55%, dilute Native Antaciron FeSiRe2120~25%, Si-Ba alloy FeBa5Si6020~25%, Al5~10%.With prior art phase Than the advantage of the invention is:Refinement casts crystal grain and improves chromium, carbide morphology, the tiny spherical MC types of even dispersion distribution Carbide, improves the wear-resisting and thermostability of high-speed steel roll outer layer, makes roll millimeter stocking increase by 25%~30% on year-on-year basis.In In terms of state, patent CN 102766824 also discloses a kind of wear-resistant high speed steel collars and preparation method thereof, and its chemical composition is quality Fraction %:2.6~3.2C, 14.5~15.0W, 2.5~3.0Mo, 1.5~2.0V, 4.0~4.5Cr, 4.5~5.0Co, 6.2~ 6.8Nb, 0.5~0.8Ni, 0.15~0.20B, 0.25~0.40Al, 0.07~0.10Y, 0.04~0.06Ti, 0.08~ 0.12N, 0.04~0.07Ca, 0.020~0.035Zr, 0.08~0.11Mg, 0.12~0.15Zn, 0.5~1.2Si, 0.20~ 0.45Mn, S&lt;0.02, P&lt;0.03, remaining is Fe.Shaped using centre spinning method, hardness is high, wearability is good.In In terms of state, patent CN102962423 also discloses centrifugal compound high-carbon high-boron high-speed steel composite roll set, by outer layer high-speed steel and interior Layer graphitic steel is composited, it is characterised in that:Outer layer high speed steel chemical composition is:C1.5~2.1, Si0.5~1.2, Mn0.6~ 0.8, P < 0.03, S < 0.03, Cr5.0~10, Ni0.5~1.0, Mo2.0~4.0, W0.5~2.0, Nd0.5~2.0, V4.0 ~6.0, Ti0.5~1.5, B0.5~2.0, N0.05~0.15, balance of Fe;Internal layer graphite steel chemical composition is:C1.3~ 2.0, Si1.1~2.0, Mn0.4~0.8, Cr0.4~1.5, Ni0.4~1.5, Mo0.2~0.6, balance of Fe;Manufacture method It is:1) temperature is risen to 1600~1620 DEG C after stokehold adjusting component is qualified by melting outer layer high-speed steel, adds aluminum and silico-calcium de- Oxygen, then comes out of the stove;2) molten steel temperature, after stokehold composition adjustment is qualified, is risen to 1580~1600 DEG C etc. by melting internal layer graphitic steel Wait to tap, in tapping process, into molten steel add silico-calcium, ferrosilicon and aluminum to carry out deoxidation, rotten and inoculation, after the completion of operation etc. It is to be cast;3) outer layer centrifugal casting is carried out when bag ectonexine high-speed steel molten steel temperature drops to 1450~1500 DEG C, when outer floor height Fast steel inner wall temperature carries out composite roll set internal layer cast when dropping to 1200~1250 DEG C, pouring temperature is 1450~1500 DEG C, is poured Note thickness is 20~50mm, and after internal layer solidification, lower machine carries out insulation cooling;4) heat treatment and machine are carried out to composite roll set blank Finished product composite roll set is obtained after processing.Its heat treatment is first to carry out 1020~1050 DEG C of the high temperature anneals, temperature retention time of annealing For 4~8h;Quenching Treatment is carried out after roughing, hardening heat is 1000~1050 DEG C, and Quenching Soaking Time is 2~4h, is incubated Air blast quenching is carried out after end, air blast quenching terminates laggard stove carries out double tempering heat treatment, tempering 1 is 500 DEG C × 30h, is returned Fire 2 is 550 DEG C × 30h.China side patent CN 102615108 also disclose a kind of centrifugal casting quick-cutting steel composite roller and Its manufacture method, composite roll are formed by centrifugal compound by outer layer high-speed steel, intermediate layer graphitic steel and core hi-strength nodular iron. The invention is, on the basis of existing high carbon and vanadium high speed steel roll, suitably to reduce content of vanadium, while niobium element is added, and Nb/V controls System is made Nb with V-arrangement into double carbide (V, Nb) C, formed under the action of the centrifugal force segregation so as to avoid in 0.3-0.5.It is high The roller core of fast steel composite roll adopts high-strength ductile cast iron, be mixed into Cr, B with the fusion of outer layer high-speed steel to prevent from pouring into a mould during magnesium iron Etc. the element for causing embrittlement, polynary graphitic steel intermediate layer is poured into a mould between outer layer and roller core.To prevent roll centrifugal casting process In there is crackle, the microalloy treatment of thinning microstructure is carried out to roll surface high speed steel material and intermediate layer graphitic steel, raising is reached The purpose of roll material thermal crack resistant ability.The invention roller comprehensive performance is high, and long service life has good economic benefit.In In terms of state, patent CN 102274856 also discloses a kind of centrifugal compound high-speed steel roll and its pouring procedure, described high-speed steel The chemical component weight percentage ratio of outer layer is:C1.8~2.6%, Cr3~10%, Nb0.2~1.0%, Mo4~10%, V5~ 10%th, W4~10%, Co2~10%, remaining is Fe and inevitable impurity.The cast side of centrifugal compound high-speed steel roll Method, including melting, cast, cooling unpack, heat treatment, it is characterised in that its job step is as follows:1) intermediate frequency furnace melting, respectively Carry out intermediate layer molten steel, 1500~1600 DEG C of smelting temperature, high-speed steel outer layer molten steel, smelting temperature 1500~ 1600 DEG C, spheroidal graphite cast-iron core cast iron melting, 1450~1500 DEG C of smelting temperature;2) respectively to intermediate layer molten steel, high speed Steel outer layer molten steel carries out Metamorphism treatment, and intermediate layer molten steel addition refining deterioration agent is rare earth and silicon barium, and addition is 0.2~ 0.6%, reaction temperature is 1500~1600 DEG C, and high-speed steel outer layer molten steel addition refining deterioration agent is rare earth and silicon barium, addition For 0.2~0.6%, reaction temperature is 1500~1600 DEG C, carries out nodularization and inoculation, nodularization to spheroidal graphite cast-iron core molten iron Agent is yttrium-base heavy rare earth, and addition is 1.0~1.6%, and inovulant is 75 ferrosilicon, and addition is 0.4~1.0%, reaction temperature 1450~1500 DEG C;3) centrifugal casting, 1420~1480 DEG C of pouring temperature, first casting high speed steel outer layer, centrifugal gravity multiple 100 ~120G, 90~110mm of cast thickness, when cast layer is cooled to 1225~1245 DEG C, then centrifugal casting intermediate layer, casting 40~60mm of thickness, centrifugal gravity 100~120G of multiple, stop when cast layer is cooled to 1220~1240 DEG C;4) core casting, By step 3 steel-casting and roll neck mold mould assembling, the spheroidal graphite cast-iron core ferrum of Jing nodularizations and inoculation in static casting step 2 Water, 1350~1430 DEG C of pouring temperature;5) room temperature is cooled to 150~155 DEG C and unpacks, and carries out hot place using car-type differential temperature stove Reason, is heated to 1000~1100 DEG C with the firing rate of 90~120 DEG C/h, after 3~5h of insulation, with the speed of 110~130 DEG C/h 420~460 DEG C are cooled to, then room temperature is cooled to the speed of 10~20 DEG C/h, then be heated to the firing rate of 9~13 DEG C/h 450~550 DEG C, after being incubated 18~25 hours, room temperature is cooled to the speed of 10~20 DEG C/h.The beneficial effect of the invention is: 1) thermal fatigue resistance and anti-wear performance of high-speed steel outer layer can be significantly improved.2) bond strength of high-speed steel outer layer and intermediate layer More than 400Mpa is reached, the peeling of high-speed steel outer layer is prevented.
But, it is shallow that above-mentioned high-speed steel roll is primarily present depth of hardening zone, roller surface uniformity of hardness difference and roll Outer layer is combined bad etc. not enough with roller core.
The content of the invention
The object of the invention is by optimizing high-speed steel roll outer composition and improving composite casting technology and heat-treatment quenching Cooling technique, overcomes depth of hardening zone shallow, and roller surface uniformity of hardness difference and skin of the roll are combined bad etc. asking with roller core Topic, realizes increasing substantially for high-speed steel roll performance.
Centrifugal casting wear-resistant high speed steel composite roll of the present invention is combined into by outer layer (body of roll), intermediate layer and three part of roller core Integrally, its concrete step of preparation process is:
1. Smelting High Speed Steel composite roll outer layer (body of roll), intermediate layer and roller core material are distinguished in three electric induction furnaces first Expect, the chemical composition mass fraction % of wherein intermediate layer material is:1.4~1.6C, 2.0~2.4Si, 0.15~0.25Ni, 0.03~0.06RE, 0.03~0.06Ti, 0.03~0.06Ca, 0.03~0.06Nb, 0.03~0.06Ba, 0.008~ 0.015N, 1.2~1.6Mn, S<0.03,P<0.04, surplus Fe;The chemical composition mass fraction % of roller core material is:3.10~ 3.40C, 1.80~2.20Si, 0.15~0.29Mn, 0.16~0.28Cu, 0.025~0.045Ca, S<0.03,P<0.08, 0.035~0.065Mg, 0.008~0.018Bi, surplus Fe;The chemical composition of outer layer high-speed steel molten steel and its mass fraction control In 1.60~2.40%C, 0.3~1.0%Mn, 0.3~1.2%Si, 4.0~6.5%Cr, 4.0~6.5%Mo, 3.0~ 6.5%V, 3.0~5.0%W, 1.0~4.0%Nb, 0.3~1.5%Ni, S<0.03%, P<0.03%, 0.06~0.12% Ti, surplus Fe;When outer layer high-speed steel liquid steel temperature reaches 1580~1600 DEG C, addition account in stove steel quality fraction 0.10~ 0.20% metallic aluminium, ladle of coming out of the stove after being incubated 4~6 minutes, is previously added 8~15mm of particle size, and Jing 200 in ladle ~260 DEG C of drying rare earth ferrosilicon alloy of 60~120 minutes and ferro-boron, rare earth ferrosilicon alloy and ferro-boron addition account for entrance respectively The 0.25~0.45% and 0.05~0.12% of steel quality fraction in ladle, when liquid steel temperature is down to 1430~1500 DEG C, Molten steel is poured in the casting mold on centrifuge, during centrifugal casting, gravity coefficient is controlled 75~120;
2., after outer layer molten steel all solidifies, continue in centrifuge upper intermediate layer material, the cast of intermediate layer material Temperature is 1450~1510 DEG C, and its thickness is 15~30mm;
3. after intermediate layer material is poured 12~18 minutes, with table in non-contact type thermodetector measurement roll intermediate layer Face temperature, when temperature is 1200~1260 DEG C, direct casting roller core material molten iron in the quiescent state, roller core molten steel pouring temperature are 1320 ~1350 DEG C;After roller core molten iron casting finishes 24~48 hours, take out compound high speed steel roll and enter burial pit, then carry out thick Processing;
4. the compound high speed steel roll after roughing is incubated 4~10 hours, subsequently goes out with stove heat to 1020~1100 DEG C Stove is air-cooled to be heated to 500~550 DEG C by roll again to 150~300 DEG C of temperature, and after insulation 10~20 hours, stove is cooled to temperature Less than 200 DEG C, roll is heated to into 500~550 DEG C again, after being incubated 10~20 hours, stove goes out after being cooled to temperature less than 200 DEG C Stove is air cooled to room temperature, is finally refined to given size and precision, you can obtain centrifugal casting wear-resistant high speed steel composite roll.
The chemical composition mass fraction % of ferro-boron is as mentioned above:19.0~21.0B ,≤0.5C ,≤2.0Si ,≤ 0.5Al ,≤0.01S ,≤0.1P, surplus Fe.
The chemical composition mass fraction % of rare earth ferrosilicon alloy is as mentioned above:27.0~30.0RE, 38.0~42.0Si, <3.0Mn,<5.0Ca,<3.0Ti, balance of Fe.
Centrifugal casting wear-resistant high speed steel composite roll of the present invention, in order to obtain excellent performance, composite roll outer layer, and roller Body working lining adopts wearability and the excellent high carbon high-speed steel material of red hardness, the chemical composition and its quality of outer layer high-speed steel molten steel Fractional domination in 1.60~2.40%C, 0.3~1.0%Mn, 0.3~1.2%Si, 4.0~6.5%Cr, 4.0~6.5%Mo, 3.0~6.5%V, 3.0~5.0%W, 1.0~4.0%Nb, 0.3~1.5%Ni, S<0.03%, P<0.03%, 0.06~ 0.12%Ti, surplus Fe.In order to improve the obdurability and Thermal fatigue properties of high carbon high-speed steel, when outer layer high-speed steel liquid steel temperature When reaching 1580~1600 DEG C, addition accounts for the metallic aluminium of steel quality fraction 0.10~0.20% in stove, after being incubated 4~6 minutes Come out of the stove ladle, in ladle, be previously added 8~15mm of particle size, and Jing 200~260 DEG C of drying rare earths of 60~120 minutes Antaciron and ferro-boron, rare earth ferrosilicon alloy and ferro-boron addition account for respectively the steel quality fraction in ladle 0.25~ 0.45% and 0.05~0.12%.
In order to ensure outer tissue it is fine and close, outer layer and intermediate layer using centre spinning method shaping, when outer layer liquid steel temperature When being down to 1430~1500 DEG C, molten steel is poured in the casting mold on centrifuge, during centrifugal casting gravity coefficient control 75~ 120.After outer layer molten steel all solidifies, continue in centrifuge upper intermediate layer material, intermediate layer material should have good Casting character, will also have excellent obdurability, therefore silicone content is properly increased on the basis of high-carbon steel, be additionally added in addition more micro- Alloying element is used to improve its tissue, and the chemical composition mass fraction % of intermediate layer material is:1.4~1.6C, 2.0~2.4Si, 0.15~0.25Ni, 0.03~0.06RE, 0.03~0.06Ti, 0.03~0.06Ca, 0.03~0.06Nb, 0.03~ 0.06Ba, 0.008~0.015N, 1.2~1.6Mn, S<0.03,P<0.04, surplus Fe.The pouring temperature of intermediate layer material is 1450~1510 DEG C, its thickness is 15~30mm.
After intermediate layer material is poured 12~18 minutes, with non-contact type thermodetector measurement roll intermediate layer inner surface Temperature, when temperature is 1200~1260 DEG C, direct casting roller core molten iron in the quiescent state, the chemical composition mass fraction % of roller core material For:3.10~3.40C, 1.80~2.20Si, 0.15~0.29Mn, 0.16~0.28Cu, 0.025~0.045Ca, S<0.03,P <0.08,0.035~0.065Mg, 0.008~0.018Bi, surplus Fe.Roller core material not only good casting property, with transition zone (in Interbed) it is tightly combined, and with excellent obdurability, it is ensured that work roll cooling safety.Roller core molten steel pouring temperature be 1320~ 1350℃.After roller core molten iron casting finishes 24~48 hours, take out compound high speed steel roll and enter burial pit, then carry out slightly adding Work.
Compound high speed steel roll after roughing to 1020~1100 DEG C, is incubated 4~10 hours, subsequently comes out of the stove with stove heat It is air-cooled to 150~300 DEG C of temperature, it can be ensured that compound high speed steel roll matrix based on martensite plus appropriate austenite, With excellent wearability.Roll is heated to 500~550 DEG C by compound high speed steel roll after air-blast quenching again, insulation 10 After~20 hours, stove is cooled to temperature less than 200 DEG C, and roll is heated to 500~550 DEG C again, after being incubated 10~20 hours, stove Come out of the stove after being cooled to temperature less than 200 DEG C and be air cooled to room temperature, primarily to guarantee proeutectoid carbide disperse educt, stabilizing tissue, Eliminate stress, it is ensured that the safe handling of compound high speed steel roll.
The present invention compared with prior art, with advantages below:
1) centrifugal casting wear-resistant high speed steel composite roll outer layer roll surface hardness of the present invention is high, and more than 82HSD, roll surface hardness is equal Even property is good, and roll surface difference of hardness is less than 2HSD;
2) centrifugal casting wear-resistant high speed steel composite roll outer layer of the present invention, be well combined between intermediate layer and roller core three;
3) centrifugal casting wear-resistant high speed steel composite roll of the present invention has excellent wearability, and its millimeter of steel transportation amount is than nickelic Chromium infinitely chilled cast iron roll improves more than 3 times.
Description of the drawings
Fig. 1 centrifugal casting wear-resistant high speed steel composite roll schematic diagrams;
1- outer layers, 2- intermediate layers, 3- roller cores.
Specific embodiment
With reference to embodiments the present invention is further described, but the present invention is not limited to following examples.
Embodiment 1:
Centrifugal casting wear-resistant high speed steel composite roll barrel diameter of the present inventionBy outer layer (body of roll), intermediate layer and Three part of roller core is combined into one, and outer layer thickness 60mm, intermediate layer thickness 30mm, outer layer, intermediate layer and roller core are respectively adopted three Platform electro-smelting, its concrete step of preparation process is:
1. Smelting High Speed Steel composite roll outer layer, intermediate layer and roller core material are distinguished in three electric induction furnaces first, its The chemical composition mass fraction % of middle intermediate layer material is:1.41C,2.38Si,0.15Ni,0.033RE,0.058Ti, 0.032Ca, 0.055Nb, 0.057Ba, 0.009N, 1.59Mn, 0.021S, 0.033P, surplus Fe.The chemical composition of roller core material Mass fraction % is:3.38C,1.80Si,0.16Mn,0.28Cu,0.026Ca,0.013S,0.058P,0.043Mg, 0.016Bi, surplus Fe.The chemical composition of outer layer high-speed steel molten steel and its mass fraction are controlled in 1.64%C, 0.97%Mn, 0.38%Si, 4.05%Cr, 6.38%Mo, 6.45%V, 3.09%W, 1.38%Nb, 0.36%Ni, 0.027%S, 0.029% P, 0.11%Ti, surplus Fe.When outer layer high-speed steel liquid steel temperature reaches 1599 DEG C, addition accounts for steel quality fraction in stove 0.20% metallic aluminium, ladle of coming out of the stove after being incubated 4 minutes, is previously added 8~15mm of particle size, and 200 DEG C of Jing in ladle (the chemical composition mass fraction % of rare earth ferrosilicon alloy is the drying rare earth ferrosilicon alloy of 120 minutes:27.08RE,38.69Si, 2.11Mn, 3.04Ca, 1.85Ti, balance of Fe) and ferro-boron (the chemical composition mass fraction % of ferro-boron is:19.05B,0.31C, 1.42Si, 0.26Al, 0.005S, 0.038P, surplus Fe), rare earth ferrosilicon alloy and ferro-boron addition are accounted in ladle respectively The 0.45% of steel quality fraction and 0.05%, when liquid steel temperature is down to 1488 DEG C, molten steel is poured into the casting mold on centrifuge Interior, during centrifugal casting, gravity coefficient is controlled 85.
2., after outer layer molten steel all solidifies, continue in centrifuge upper intermediate layer material, the cast of intermediate layer material Temperature is 1499 DEG C, and its thickness is 30mm.
3. after intermediate layer material is poured 18 minutes, with non-contact type thermodetector measurement roll intermediate layer inner surface temperature Degree, when temperature is 1200~1260 DEG C, direct casting roller core molten iron in the quiescent state, roller core molten steel pouring temperature are 1324 DEG C.Roller core After molten iron casting finishes 48 hours, take out compound high speed steel roll and enter burial pit, then carry out roughing.
4. the compound high speed steel roll after roughing is incubated 8 hours, subsequently comes out of the stove air-cooled to warm with stove heat to 1100 DEG C Roll is heated to 550 DEG C by degree 280 DEG C again, and after being incubated 10 hours, stove is cooled to temperature less than 200 DEG C, heats roll again To 500 DEG C, after being incubated 20 hours, stove is come out of the stove after being cooled to temperature less than 200 DEG C and is air cooled to room temperature, is finally refined to given size And precision, you can centrifugal casting wear-resistant high speed steel composite roll is obtained, its mechanical property is shown in Table 1.
Embodiment 2:
Centrifugal casting wear-resistant high speed steel composite roll barrel diameter of the present inventionBy outer layer (body of roll), intermediate layer and Three part of roller core is combined into one, and outer layer thickness 55mm, intermediate layer thickness 20mm, outer layer, intermediate layer and roller core are respectively adopted three Platform electro-smelting, its concrete step of preparation process is:
1. Smelting High Speed Steel composite roll outer layer, intermediate layer and roller core material are distinguished in three electric induction furnaces first, its The chemical composition mass fraction % of middle intermediate layer material is:1.57C,2.02Si,0.24Ni,0.059RE,0.031Ti, 0.059Ca, 0.035Nb, 0.037Ba, 0.014N, 1.24Mn, 0.017S, 0.029P, surplus Fe.The chemical composition of roller core material Mass fraction % is:3.12C,2.20Si,0.27Mn,0.18Cu,0.044Ca,0.018S,0.046P,0.058Mg, 0.009Bi, surplus Fe.The chemical composition of outer layer high-speed steel molten steel and its mass fraction are controlled in 2.36%C, 0.33%Mn, 1.18%Si, 4.30%Cr, 4.62%Mo, 3.08%V, 4.99%W, 3.87%Nb, 1.44%Ni, 0.022%S, 0.027% P, 0.07%Ti, surplus Fe.When outer layer high-speed steel liquid steel temperature reaches 1584 DEG C, addition accounts for steel quality fraction in stove 0.10% metallic aluminium, ladle of coming out of the stove after being incubated 6 minutes, is previously added 8~15mm of particle size, and 260 DEG C of Jing in ladle (the chemical composition mass fraction % of rare earth ferrosilicon alloy is the drying rare earth ferrosilicon alloy of 80 minutes:29.05RE,41.37Si, 2.06Mn, 4.52Ca, 1.88Ti, balance of Fe) and ferro-boron (the chemical composition mass fraction % of ferro-boron is:20.84B,0.35C, 1.56Si, 0.29Al, 0.008S, 0.046P, surplus Fe), rare earth ferrosilicon alloy and ferro-boron addition are accounted in ladle respectively The 0.25% of steel quality fraction and 0.12%, when liquid steel temperature is down to 1439 DEG C, molten steel is poured into the casting mold on centrifuge Interior, during centrifugal casting, gravity coefficient is controlled 78.
2., after outer layer molten steel all solidifies, continue in centrifuge upper intermediate layer material, the cast of intermediate layer material Temperature is 1453 DEG C, and its thickness is 20mm.
3. after intermediate layer material is poured 15 minutes, with non-contact type thermodetector measurement roll intermediate layer inner surface temperature Degree, when temperature is 1200~1260 DEG C, direct casting roller core molten iron in the quiescent state, roller core molten steel pouring temperature are 1347 DEG C.Roller core After molten iron casting finishes 36 hours, take out compound high speed steel roll and enter burial pit, then carry out roughing.
4. the compound high speed steel roll after roughing is incubated 6 hours, subsequently comes out of the stove air-cooled to warm with stove heat to 1050 DEG C Roll is heated to 500 DEG C by degree 180 DEG C again, and after being incubated 20 hours, stove is cooled to temperature less than 200 DEG C, heats roll again To 550 DEG C, after being incubated 10 hours, stove is come out of the stove after being cooled to temperature less than 200 DEG C and is air cooled to room temperature, is finally refined to given size And precision, you can centrifugal casting wear-resistant high speed steel composite roll is obtained, its mechanical property is shown in Table 1.
Embodiment 3:
Centrifugal casting wear-resistant high speed steel composite roll barrel diameter of the present inventionBy outer layer (body of roll), intermediate layer and Three part of roller core is combined into one, and outer layer thickness 50mm, intermediate layer thickness 15mm, outer layer, intermediate layer and roller core are respectively adopted three Platform electro-smelting, its concrete step of preparation process is:
1. Smelting High Speed Steel composite roll outer layer, intermediate layer and roller core material are distinguished in three electric induction furnaces first, its The chemical composition mass fraction % of middle intermediate layer material is:1.48C,2.31Si,0.19Ni,0.047RE,0.040Ti, 0.048Ca, 0.051Nb, 0.046Ba, 0.011N, 1.45Mn, 0.028S, 0.035P, surplus Fe.The chemical composition of roller core material Mass fraction % is:3.26C,1.97Si,0.19Mn,0.21Cu,0.029Ca,0.021S,0.063P,0.048Mg, 0.012Bi, surplus Fe.The chemical composition of outer layer high-speed steel molten steel and its mass fraction are controlled in 1.99%C, 0.65%Mn, 0.70%Si, 5.08%Cr, 4.98%Mo, 5.12%V, 3.57%W, 2.06%Nb, 0.93%Ni, 0.025%S, 0.028% P, 0.09%Ti, surplus Fe.When outer layer high-speed steel liquid steel temperature reaches 1597 DEG C, addition accounts for steel quality fraction in stove 0.15% metallic aluminium, ladle of coming out of the stove after being incubated 5 minutes, is previously added 8~15mm of particle size, and 240 DEG C of Jing in ladle (the chemical composition mass fraction % of rare earth ferrosilicon alloy is the drying rare earth ferrosilicon alloy of 100 minutes:28.54RE,39.05Si, 2.08Mn, 3.29Ca, 1.64Ti, balance of Fe) and ferro-boron (the chemical composition mass fraction % of ferro-boron is:19.80B,0.40C, 1.37Si, 0.32Al, 0.008S, 0.051P, surplus Fe), rare earth ferrosilicon alloy and ferro-boron addition are accounted in ladle respectively The 0.35% of steel quality fraction and 0.08%, when liquid steel temperature is down to 1464 DEG C, molten steel is poured into the casting mold on centrifuge Interior, during centrifugal casting, gravity coefficient is controlled 115.
2., after outer layer molten steel all solidifies, continue in centrifuge upper intermediate layer material, the cast of intermediate layer material Temperature is 1482 DEG C, and its thickness is 15mm.
3. after intermediate layer material is poured 12 minutes, with non-contact type thermodetector measurement roll intermediate layer inner surface temperature Degree, when temperature is 1200~1260 DEG C, direct casting roller core molten iron in the quiescent state, roller core molten steel pouring temperature are 1346 DEG C.Roller core After molten iron casting finishes 24 hours, take out compound high speed steel roll and enter burial pit, then carry out roughing.
4. the compound high speed steel roll after roughing is incubated 8 hours, subsequently comes out of the stove air-cooled to warm with stove heat to 1020 DEG C Roll is heated to 530 DEG C by degree 160 DEG C again, and after being incubated 15 hours, stove is cooled to temperature less than 200 DEG C, heats roll again To 530 DEG C, after being incubated 15 hours, stove is come out of the stove after being cooled to temperature less than 200 DEG C and is air cooled to room temperature, is finally refined to given size And precision, you can centrifugal casting wear-resistant high speed steel composite roll is obtained, its mechanical property is shown in Table 1.
1 centrifugal casting wear-resistant high speed steel composite roll mechanical property of table
Centrifugal casting wear-resistant high speed steel composite roll outer layer roll surface hardness of the present invention is high, and more than 82HSD, roll surface hardness is uniform Property it is good, roll surface difference of hardness be less than 2HSD.Jing ultrasonic examinations, find outside centrifugal casting wear-resistant high speed steel composite roll of the present invention Layer, it is well combined between intermediate layer and roller core three.Roll roller core intensity of the present invention is high, it can be ensured that the safe handling of roll. Roll of the present invention is pricked in hot-strip essence and use in frame, is shown using result, and roll wear of the present invention is uniform, with good Wear-resistant and thermal fatigue resistance, its millimeter of steel transportation amount than high Ni-Cr infinite cold hardness cast iron roll improve more than 3 times.Using this Invention roll, can improve operating rate of rolling mill, improve stocking surface quality, mitigate labor strength, and popularization and application have good Good economic and social benefit.

Claims (5)

1. a kind of method of centrifugal casting wear-resistant high speed steel composite roll, it is characterised in that composite roll by outer layer, intermediate layer and Three part of roller core is combined into one, and its concrete step of preparation process includes as follows:
1. Smelting High Speed Steel composite roll outer layer, intermediate layer and roller core material are distinguished in three electric induction furnaces first, wherein in The chemical composition mass fraction % of interlayer material is:1.4~1.6C, 2.0~2.4Si, 0.15~0.25Ni, 0.03~ 0.06RE, 0.03~0.06Ti, 0.03~0.06Ca, 0.03~0.06Nb, 0.03~0.06Ba, 0.008~0.015N, 1.2 ~1.6Mn, S<0.03,P<0.04, surplus Fe;The chemical composition mass fraction % of roller core material is:3.10~3.40C, 1.80 ~2.20Si, 0.15~0.29Mn, 0.16~0.28Cu, 0.025~0.045Ca, S<0.03,P<0.08,0.035~ 0.065Mg, 0.008~0.018Bi, surplus Fe;The chemical composition of outer layer high-speed steel molten steel and its mass fraction are controlled 1.60 ~2.40%C, 0.3~1.0%Mn, 0.3~1.2%Si, 4.0~6.5%Cr, 4.0~6.5%Mo, 3.0~6.5%V, 3.0 ~5.0%W, 1.0~4.0%Nb, 0.3~1.5%Ni, S<0.03%, P<0.03%, 0.06~0.12%Ti, surplus Fe;When When outer layer high-speed steel liquid steel temperature reaches 1580~1600 DEG C, addition accounts for the metal of steel quality fraction 0.10~0.20% in stove Aluminum, ladle of coming out of the stove after being incubated 4~6 minutes are previously added 8~15mm of particle size, and 200~260 DEG C of drying of Jing in ladle The rare earth ferrosilicon alloy of 60~120 minutes and ferro-boron, rare earth ferrosilicon alloy and ferro-boron addition account for the molten steel in ladle respectively The 0.25~0.45% of mass fraction and 0.05~0.12%, when liquid steel temperature is down to 1430~1500 DEG C, molten steel is poured into In casting mold on centrifuge, during centrifugal casting, gravity coefficient is controlled 75~120;
2., after outer layer molten steel all solidifies, continue in centrifuge upper intermediate layer material, the pouring temperature of intermediate layer material For 1450~1510 DEG C, its thickness is 15~30mm;
3. after intermediate layer material is poured 12~18 minutes, with non-contact type thermodetector measurement roll intermediate layer inner surface temperature Degree, when temperature is 1200~1260 DEG C, direct casting roller core material molten iron in the quiescent state, roller core molten steel pouring temperature is 1320~ 1350℃;After roller core molten iron casting finishes 24~48 hours, take out compound high speed steel roll and enter burial pit, then carry out slightly adding Work;
4. the compound high speed steel roll after roughing is incubated 4~10 hours, wind of subsequently coming out of the stove with stove heat to 1020~1100 DEG C It is cooled to 150~300 DEG C of temperature, roll is heated to into 500~550 DEG C again, after being incubated 10~20 hours, stove is cooled to temperature and is less than 200 DEG C, roll is heated to into 500~550 DEG C again, after being incubated 10~20 hours, stove is cooled to after temperature is less than 200 DEG C sky of coming out of the stove It is cooled to room temperature, is finally refined to given size and precision, you can obtains centrifugal casting wear-resistant high speed steel composite roll.
2. according to the method for claim 1, it is characterised in that the chemical composition mass fraction % of the ferro-boron is:19.0~ 21.0B ,≤0.5C ,≤2.0Si ,≤0.5Al ,≤0.01S ,≤0.1P, balance of Fe.
3. according to the method for claim 1, it is characterised in that the chemical composition mass fraction % of the rare earth ferrosilicon alloy is: 27.0~30.0RE, 38.0~42.0Si,<3.0Mn,<5.0Ca,<3.0Ti, balance of Fe.
4. the wear-resistant high speed steel composite roll for preparing according to the either method of claim 1-3.
CN201410537913.7A 2014-10-13 2014-10-13 A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof Active CN104264043B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410537913.7A CN104264043B (en) 2014-10-13 2014-10-13 A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410537913.7A CN104264043B (en) 2014-10-13 2014-10-13 A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof

Publications (2)

Publication Number Publication Date
CN104264043A CN104264043A (en) 2015-01-07
CN104264043B true CN104264043B (en) 2017-04-05

Family

ID=52155615

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410537913.7A Active CN104264043B (en) 2014-10-13 2014-10-13 A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof

Country Status (1)

Country Link
CN (1) CN104264043B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105458227B (en) * 2015-12-04 2017-12-29 北京工业大学 Centrifugal casting high-boron high-speed steel composite roller and preparation method thereof
CN105750529B (en) * 2016-04-01 2017-10-31 枣庄瑞兴机械制造有限公司 A kind of high tungsten high abrasion compound high speed steel roll and preparation method thereof
JPWO2018147370A1 (en) * 2017-02-08 2019-12-12 日立金属株式会社 Composite roll for rolling and manufacturing method thereof
CN107287498A (en) * 2017-08-02 2017-10-24 马鞍山市万鑫铸造有限公司 Ferrite nodular cast iron and its gravity foundry technology
CN107829041A (en) * 2017-11-01 2018-03-23 南通欧科数控设备有限公司 A kind of drill bit tungsten system high speed steel material
CN108311654B (en) * 2018-02-09 2020-06-16 邢台德龙机械轧辊有限公司 Production method for preparing thick-wall metal die by centrifugal method
CN111945053A (en) * 2020-07-13 2020-11-17 安徽环渤湾高速钢轧辊有限公司 Method for preparing high-speed steel roller by composite modification treatment
CN112008056B (en) * 2020-10-28 2021-03-23 常州凯达重工科技有限公司 High-speed steel roll and casting method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101412050A (en) * 2008-11-28 2009-04-22 北京工业大学 Abrasion-proof cast iron roll collar for straightening steel rail and preparation method thereof
CN102615108A (en) * 2012-04-09 2012-08-01 北京工业大学 Centrifugal casting high-speed steel composite roll and manufacture method thereof
CN102994692A (en) * 2012-12-01 2013-03-27 云南昆钢重型装备制造集团有限公司 High-boron high-speed steel roller material and smelting process thereof
CN103624084A (en) * 2013-11-20 2014-03-12 枣庄瑞兴机械制造有限公司 Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101412050A (en) * 2008-11-28 2009-04-22 北京工业大学 Abrasion-proof cast iron roll collar for straightening steel rail and preparation method thereof
CN102615108A (en) * 2012-04-09 2012-08-01 北京工业大学 Centrifugal casting high-speed steel composite roll and manufacture method thereof
CN102994692A (en) * 2012-12-01 2013-03-27 云南昆钢重型装备制造集团有限公司 High-boron high-speed steel roller material and smelting process thereof
CN103624084A (en) * 2013-11-20 2014-03-12 枣庄瑞兴机械制造有限公司 Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof

Also Published As

Publication number Publication date
CN104264043A (en) 2015-01-07

Similar Documents

Publication Publication Date Title
CN104264043B (en) A kind of centrifugal casting wear-resistant high speed steel composite roll and preparation method thereof
CN105618715B (en) A kind of wear-resistant high speed steel composite roll and preparation method thereof
CN103624084B (en) Resource-saving type high-boron high-speed steel composite roll and manufacturing method thereof
CN102962423B (en) Centrifugal high-carbon, high-boron and high-speed steel composite roller shell and fabrication method of combined roller of composite roller shell
CN104148399B (en) For abrasion-resistant roller of mill stand and preparation method thereof in steel rolling
CN104775065B (en) A kind of high toughness wear resistant magnesium iron rocking arm and preparation method thereof
CN104388812B (en) High-speed steel composite roller for rods/wires and preparation method of high-speed steel composite roller
CN101705430B (en) High-speed steel roll and preparation method thereof by centrifugal compounding in electromagnetic field
CN103866200B (en) High-boron high-speed steel composite roller and manufacturing method thereof
CN100575528C (en) Cobalt less multi element high speed tool steel and manufacture method thereof
CN102766824B (en) Abrasion-resistant high-speed-steel roller ring and preparation method thereof
CN100574910C (en) Centrifugal casting half steel/steel/graphite steel composite roll collar and preparation method thereof
CN104001905B (en) A kind of abrasion-resistant cast compound high speed steel roll and preparation method thereof
CN103014516B (en) Borated low-alloy high-speed steel roller and manufacturing method thereof
CN102990031B (en) Centrifugal compound casting method of high-boron high-speed steel roller
CN105750529B (en) A kind of high tungsten high abrasion compound high speed steel roll and preparation method thereof
CN103526125A (en) Semi-steel roll and manufacturing method thereof
CN104004960B (en) A kind of low chromium vanadium titanium cast iron abrading-ball and preparation method thereof
CN103993220B (en) A kind of Hypoeutectic high-chromium white cast iron roll and preparation method
CN106884126A (en) A kind of high chromium steel roller and its manufacture method
CN109402492B (en) External treatment method for carbide-containing nodular cast iron molten iron
CN108504959A (en) A kind of Austenitic Medium Manganese Steel and preparation method thereof of composite alloying processing
CN105331874B (en) A kind of spheroidal graphite cast-iron cast gear
CN103215526B (en) Centrifugally-cast high-carbon high-alloy steel and heat treatment method thereof
CN106544596B (en) A kind of aluminium alloying high-boron high-speed steel composite roller and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
GR01 Patent grant