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 PDFInfo
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- 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
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- 229910000997 High-speed steel Inorganic materials 0.000 title claims abstract description 100
- 239000002131 composite material Substances 0.000 title claims abstract description 41
- 238000009750 centrifugal casting Methods 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000005096 rolling process Methods 0.000 title abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 73
- 239000010959 steel Substances 0.000 claims abstract description 73
- 239000000203 mixture Substances 0.000 claims abstract description 35
- 239000000126 substance Substances 0.000 claims abstract description 35
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 13
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 12
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 8
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 68
- 239000011162 core material Substances 0.000 claims description 52
- 239000000463 material Substances 0.000 claims description 34
- 238000005266 casting Methods 0.000 claims description 30
- 150000001875 compounds Chemical class 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 23
- 229910052796 boron Inorganic materials 0.000 claims description 20
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 19
- 150000002910 rare earth metals Chemical class 0.000 claims description 19
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 14
- 238000003723 Smelting Methods 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 8
- 238000009933 burial Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
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- 239000002245 particle Substances 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims 11
- 239000011229 interlayer Substances 0.000 claims 1
- 238000010791 quenching Methods 0.000 abstract description 11
- 230000000171 quenching effect Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 description 11
- 238000001816 cooling Methods 0.000 description 10
- 239000010955 niobium Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 229910001141 Ductile iron Inorganic materials 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- 238000005496 tempering Methods 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000011081 inoculation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- OOJQNBIDYDPHHE-UHFFFAOYSA-N barium silicon Chemical compound [Si].[Ba] OOJQNBIDYDPHHE-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 229910000600 Ba alloy Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910008332 Si-Ti Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910006749 Si—Ti Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 1
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical group [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
- 238000010106 rotational casting Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
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- 239000011593 sulfur Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
Landscapes
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Continuous Casting (AREA)
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
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 (4)
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.
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Patent Citations (4)
| 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 |
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| CN104264043A (en) | 2015-01-07 |
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