CN102851597A - Anti-abrasion sink roller shaft sleeve and manufacturing method thereof - Google Patents
Anti-abrasion sink roller shaft sleeve and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to an anti-abrasion sink roller shaft sleeve and a manufacturing method thereof, belonging to the technical field of sink roller shaft sleeves. The anti-abrasion sink roller shaft sleeve is prepared from the following components in percentage by mass: 0.15-0.28% of C, 3.0-3.5% of B, 2.0-2.5% of Cr, 9.5-10.0% of W, 2.5-3.0% of Mo, 0.65-0.80% of Al, 1.20-1.50% of Si, 0.25-0.50% of Mn, 0.04-0.08% of Y, 0.06-0.10% of Ti, 0.06-0.10% of Nb, 0.03-0.06% of Ca, 0.05-0.08% of Mg, 0.08-0.12% of K, less than 0.04% of S, less than 0.05% of P and the balance of Fe. The manufacturing method comprises the following steps: smelting in an electric furnace to form by a casting method, quenching, tempering and carrying out finish machining. The anti-abrasion sink roller shaft sleeve has the advantages of high hardness, abrasion resistance, high toughness and favorable zinc liquid corrosion resistance.
Description
Technical field
The present invention relates to a kind of dip-roll sleeve and manufacture method thereof, particularly a kind of anti scuffing dip-roll sleeve and manufacture method thereof belong to the dip-roll sleeve technical field.
Background technology
When continuous hot galvanizing was produced, steel band changed direction by the sinking roller that is immersed in the zinc liquid (temperature is 460 ~ 480 ℃), namely by enter the zinc pot soak zinc become the zinc pot, zinc coating solidifies cooling.The sinking roller that rotates with the motion of steel band is supported on the anchor by the axle sleeve of both sides, and axle sleeve plays sliding surface bearing.The material, axle sleeve that domestic and international at present pot galvanize unit uses, comprise cobalt base alloy Stellite 6B, low-carbon (LC) Cr-Ni steel alloy and austenitic heat-resistance steel etc., wherein cobalt base alloy have resistance to wear, the good characteristic such as corrosion-resistant, high temperature resistant, high rigidity, be used as dip-roll sleeve, result of use is best, but cobalt base alloy is expensive, promotes the use of difficulty.And Cr-Ni steel alloy and austenitic heat-resistance steel axle sleeve have formed on the surface owing to corroded by zinc liquid and have contained the approximately Al of 13at% of Zn
5Fe
2Massive phase, these average hardness are about the fragility massive phase that HV700, diameter be about 50 μ m to be become abrasive particle and makes axle sleeve be subjected to violent abrasive wear.Axle sleeve is subjected to the combined action of corrosive wear and abrasive wear and lost efficacy rapidly.Therefore, improve the work-ing life of axle sleeve and should set about from following two aspects: the one, improve the ability that the material, axle sleeve anti-Zn solution corrodes, the 2nd, improve the hardness of axle sleeve own to alleviate the abrasive wear degree.Because axle sleeve is worked in zinc liquid, therefore require material that higher hot hardness should be arranged.Axle sleeve adopts electric-arc welding to be installed on anchor and the sinking roller, also adopts electric-arc welding the axle sleeve thinnest part is hardening cracked and to unload after the use.Thereby material, axle sleeve will have certain weldability.
In order to improve the work-ing life of dip-roll sleeve, Chinese invention patent CN101205598 discloses a kind of dip-roll sleeve, is comprised of stainless steel base 1 and cobalt-based laser cladding layer 2 two portions, and cobalt-based laser cladding layer 2 covers on the stainless steel base 1.This invention also provides the manufacture method of dip-roll sleeve, and it is characterized in that operation is as follows: 1. the processing stainless steel matrix 1; 2. mechanical workout; 3. laser melting coating, on stainless steel base 1 cylindrical, first cladding prime coat, again cladding functional layer; Laser cladding technological parameter is: laser power 3000～5000W, spot diameter are 2～5mm, sweep velocity 2～10mm/s; 4. be machined to size.The dip-roll sleeve that this invention provides and manufacture method thereof, its advantage is: material use efficiency is high; The resisting corrosion of molten zinc bed thickness can reach more than the 2mm; Axle sleeve intensity is high; And this manufacture method strong adaptability, easy and simple to handle, standardization is strong.Chinese invention patent CN102128208A also discloses a kind of preparation method of sink roller shaft sleeve with high bonding strength.By ceramic surface metallization and soldering tech, stainless steel is connected with ceramic matrix.Master operation has: 1, ceramic surface metallization; 2, adopt Co base solder brazing to connect pottery and stainless steel base.Contain Co, Si, Cu, Cr, B, W, C and binding agent in the Co base solder, raw material can be simple substance powder or alloy or compound, also can be the combination of this different materials; Binding agent can be inorganic substance, also has portions additive and auxiliary agent to mix.The preparation method of the high bond strength axle sleeve that this invention provides, its advantage is: the bonding strength of pottery and metal is high, the resisting corrosion of molten zinc bed thickness, can reach more than the 2mm, has prolonged widely the high temperature resistant liquid zinc corrosion life-span; And this manufacture method strong adaptability, easy and simple to handle, standardization is strong, production cost is lower, has huge practical value.Chinese invention patent CN101596634 also discloses the bearing shell at a kind of used for hot dip galvanizing sinking roller and stabilizing roller two ends and the composite overlaying method of axle sleeve, its matrix adopting stainless steel and iron sill, built-up welding has the Co-base alloy material working face on its matrix, the step that adopts is: with the substrate preheating to 500 of the bearing shell made and axle sleeve～650 ℃, insulation 1～3h, then with the speed slow cooling of 50-150 ℃/h to 250-350 ℃, built-up welding Co-base alloy material on its matrix, the bearing shell that built-up welding is good and axle sleeve are heated to 500～650 ℃, insulation 1～3h, then arrive room temperature with the speed slow cooling of 10-50 ℃/h, at last roughing and precision work are carried out in bearing shell and the axle sleeve of composite overlaying; The sinking roller of this invention and stabilizing roller are worked under the conditions such as hot-dip aluminizing, aluminium zinc, zinc, zinc-aluminium, fine aluminium liquid with axial sleeve of bushing, have enough matrixes and working face bonding strength, and good corrosion-resistant, abrasion resistance properties, improved work-ing life and reliability that sinking roller or stabilizing roller are used axial sleeve of bushing.But above-mentioned axle sleeve surface treatment method exists alloy layer thickness wayward, and the deficiency with peeling off easy to crack in the alloy layer use procedure.
For this reason, Chinese invention patent CN101597722 discloses multielement ferroboron of a kind of molten zinc corrosion resistant and preparation method thereof, its chemical composition be (massfraction, %):＜0.06C, 4.5～8.5B, 4.0～5.0Si, 4.5～5.5Mn, 3.5～5.0Cr, 0.8～1.5Ni, S＜0.03, P＜0.03, surplus Fe.This invention multielement ferroboron carries out stress relief annealing at 250～300 ℃ and processes after melting, casting, and multielement ferroboron has excellent molten zinc corrosion resistant performance, wait deficiency but exist to wear no resistance, and welding property is relatively poor.Chinese invention patent CN101215671 also discloses a kind of material capable of resisting zinc solution corrosive wear and manufacture method thereof.This material capable of resisting zinc solution corrosive wear chemical composition is (% by weight): 0.6-0.8C, 4.0-7.0B, and 4.0-6.0Cr, 4.0-7.0Mo, 2.0-5.0W, 0.3-0.6Si, 0.3-0.6Mn, S＜0.05, P＜0.05, surplus is Fe.This invention material capable of resisting zinc solution corrosive wear utilizes electrosmelting, adopts the castmethod moulding, and foundry goods carries out roughing after annealing, after 980-1020 ℃ of quenching and 520-580 ℃ of tempering, carries out precision work.This invention material capable of resisting zinc solution corrosive wear normal temperature hardness is high, reaches 62-65HRC, and the hardness in the time of 500 ℃ also reaches 56-58HRC.Bending strength has reached 900-1100MPa.Under the corrosive wear of zinc solution environment, have good result of use, but this invention material exists fragility large, easy to crack and peel off and the poor deficiency that waits of welding property in the use.
Summary of the invention
The object of the invention provides a kind of high temperature resistance wearing and tearing and good dip-roll sleeve and the manufacture method thereof of liquid zinc corrosion performance.The present invention is directed to existing dip-roll sleeve above shortcomings, dip-roll of the present invention is enclosed within on the low-carbon high-speed base steel plinth, adds boron, keeping rapid steel to have under the prerequisite of good high temperature red hardness, also has excellent molten zinc corrosion resistant ability.In addition, the present invention has also added an amount of yttrium, magnesium, calcium, titanium, niobium, potassium, mainly plays deoxidation, desulfurization, and thinning microstructure improves the effect of inclusion morphology and distribution, is conducive to improve the obdurability of the mechanical property of dip-roll sleeve, particularly dip-roll sleeve.
Concrete composition and the massfraction % of dip-roll sleeve of the present invention are as follows: 0.15-0.28C, 3.0-3.5B, 2.0-2.5Cr, 9.5-10.0W, 2.5-3.0Mo, 0.65-0.80Al, 1.20-1.50Si, 0.25-0.50Mn, 0.04-0.08Y, 0.06-0.10Ti, 0.06-0.10Nb, 0.03-0.06Ca, 0.05-0.08Mg, 0.08-0.12K, S＜0.04, P＜0.05, surplus are Fe.
Dip-roll sleeve electrosmelting of the present invention, its manufacturing technology steps is:
1. with ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten clear rear ferrosilicon and the ferromanganese of adding of molten steel, continue to be warming up to 1590～1610 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, come out of the stove when after the stokehold adjusting component is qualified temperature being risen to 1620～1650 ℃;
2. step molten steel is 1. come out of the stove and is poured in the process of ladle, when the molten steel tapping reaches 40-60%, will coat tight yttrium based heavy rare earths magnesium ferro-silicon again and coat the tight potassium material that contains and throw away into ladle with stream;
3. adopt centre spinning method or lost-foam casting method with step 2. molten steel carry out dip-roll sleeve cast, wherein when adopting centre spinning method to pour into a mould dip-roll sleeve, the pouring molten steel temperature is 1440-1460 ℃; When adopting lost-foam casting method cast dip-roll sleeve, the pouring molten steel temperature is 1470-1490 ℃;
4. pour into a mould the air cooling dip-roll sleeve of unpacking after 0.5～2.0 hour, then adopt the dip-roll sleeve of lost-foam casting method cast to need spruing, cleaning undesirable root, overlap, burr carry out roughing subsequently, obtain treating accurately machined dip-roll sleeve;
Adopt the dip-roll sleeve of centre spinning method cast then only to need cleaning undesirable root, overlap, burr, carry out subsequently roughing, obtain treating accurately machined dip-roll sleeve;
5. will be until accurately machined dip-roll sleeve behind 1080-1100 ℃ of insulation 1-3h, carry out oil quenchinng, the quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 150-180 ℃ behind 550-580 ℃ of insulation 6-8h, last precision work obtains the finished product dip-roll sleeve of specified dimension and precision.
In a specific embodiment of the present invention, the coating of step described in 2. refers to adopt the stalloy of thickness 0.10-0.25mm to coat.
In another specific embodiment of the present invention, the mass percent of the yttrium based heavy rare earths magnesium ferro-silicon of step described in 2. is 5 ~ 8% Y, 7 ~ 10% Mg, and 40 ~ 44% Si, surplus is Fe; The described potassium material that contains is through 350 ℃ of baked KMnO
4
The performance of dip-roll sleeve is determined by metallographic structure, and certain tissue depends on chemical composition and thermal treatment process, and dip-roll sleeve chemical composition of the present invention is to determine like this:
Carbon: carbon is the important element that improves material hardness and wear resistance, and carbon content is excessively low, and material hardness is low, wears no resistance, and carbon content is too high, and material fragility is large, considers carbon content control at 0.15-0.28%.
Boron: dip-roll is enclosed within and bears corrosion and wearing and tearing in the zinc liquid, adds boron, mainly is in order to obtain the Fe of molten zinc corrosion resistant excellent property
2The B boride, boron content is excessively low, Fe
2B boride quantity very little, the molten zinc corrosion resistant poor-performing of dip-roll sleeve, add-on is too much, Fe
2B boride quantity is too many, and dip-roll sleeve fragility is too large, very easily breaks in the use, considers, and boron content is controlled at 3.0-3.5%.
Tungsten and molybdenum: tungsten and molybdenum can obviously improve red hardness and the hot hardness of material, improve the high temperature wear resistance of material, add tungsten and molybdenum in the dip-roll sleeve, mainly be to be enclosed within fastness to wear under the high temperature zinc liquid environment in order to improve dip-roll, the suitable add-on of tungsten should be controlled at 9.5-10.0%, and the suitable add-on of molybdenum should be controlled at 2.5-3.0%.
Aluminium: aluminium adds in the dip-roll sleeve, except playing desoxydatoin, aluminium is non-carbide forming element, mainly be dissolved in matrix, can obviously improve matrix high temperature resistance softening power, be conducive to improve the wear resistance of dip-roll sleeve, prolong the work-ing life of dip-roll sleeve, add-on is too much, the smelting molten steel difficulty, and the suitable add-on of aluminium should be controlled at 0.65-0.80%.
Chromium: the chromium solid solution is in matrix, has good raising matrix hardening capacity ability, in addition, chromium also has the good oxidation-resistance property in the material heat treatment process that improves, add-on is too much, causes carbide quantity to increase, and the matrix carbon content descends, reduce on the contrary hardness and the wear resistance of material, the suitable add-on of chromium should be controlled at 2.0-2.5%.
Silicon and manganese: silicon and manganese mainly play desoxydatoin, and silicon is strengthened the matrix effect in addition, and add-on is too much, damage on the contrary the high-temperature behavior of material, and the suitable add-on of silicon should be controlled at 1.20-1.50%, and the suitable add-on of manganese should be controlled at 0.25-0.50%.
Yttrium, magnesium, calcium, titanium, niobium, potassium: in dip-roll sleeve, add an amount of yttrium, magnesium, calcium, titanium, niobium, potassium, a main deoxidation, desulfurization, thinning microstructure, improve the effect of inclusion morphology and distribution, be conducive to improve the mechanical property of material, the obdurability of material particularly, the suitable add-on of yttrium should be controlled at 0.04-0.08%, the suitable add-on of titanium should be controlled at 0.06-0.10%, and the suitable add-on of niobium should be controlled at 0.06-0.10%, and the suitable add-on of magnesium should be controlled at 0.05-0.08%, the suitable add-on of calcium should be controlled at 0.03-0.06%, and the suitable add-on of potassium should be controlled at 0.08-0.12%.
The potassium material that contains of the present invention is through 350 ℃ of baked KMnO
4Add before the molten steel KMnO
4Through 350 ℃ of roastings, because KMnO
4Unstable, following reaction can occur in roasting process:
Formula (1)
Formula (2)
Therefore, joining the main component that contains the potassium material in the molten steel is MnO in fact
2, Mn
2O
3And K
2Three kinds of materials of O, and K
2Following reaction can occur again in O under the molten steel high temperature action:
Effect of the present invention:
(1) make dip-roll sleeve in the pot galvanize liquation with the present invention, have hardness high, the characteristics such as red hardness is good, its normal temperature hardness reaches 66-68HRC, and the red hardness in the time of 500 ℃ reaches 62-64HRC.
(2) dip-roll sleeve of the present invention has also added an amount of yttrium, magnesium, calcium, titanium, niobium, potassium, a main deoxidation, desulfurization, thinning microstructure, improve the effect of inclusion morphology and distribution, be conducive to improve the mechanical property of dip-roll sleeve, its bending strength reaches 2600-2750MPa, and impelling strength reaches 8-10J/cm2.
(3) dip-roll sleeve of the present invention adopts centre spinning method or lost-foam casting method production, and simple process contains the Fe2B phase that 35-40% is net distribution in its metallographic structure, can obviously improve the molten zinc corrosion resistant ability of dip-roll sleeve.
(4) the sink roll of hot galvanizing unit axle sleeve made from the present invention, have good resistance to wearing and corrosive power, under identical applying working condition, improve 9-10 doubly than 316L stainless steel work-ing life, and production cost is suitable with 316L stainless steel dip-roll sleeve, applies respond well.
The invention will be further described below in conjunction with embodiment:
Embodiment 1:
Use the electrosmelting dip-roll sleeve, its manufacturing technology steps is:
1. with ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten clear rear ferrosilicon and the ferromanganese of adding of molten steel, continue to be warming up to 1592 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, come out of the stove when after the stokehold adjusting component is qualified temperature being risen to 1623 ℃;
2. in the molten steel tapping process, tapping 42% the time when molten steel, is 5 ~ 8% Y with mass percent, 7 ~ 10% Mg, and 40 ~ 44% Si, surplus is the yttrium based heavy rare earths magnesium ferro-silicon of Fe and through 350 ℃ of baked KMnO
4Contain the potassium material, tight with the stalloy coating of thickness 0.10mm, then throw away into ladle with stream;
3. adopt centre spinning method cast dip-roll sleeve, the pouring molten steel temperature is 1445;
4. pour into a mould the air cooling dip-roll sleeve of unpacking after 2.0 hours, cleaning undesirable root, overlap, burr carry out roughing subsequently, obtain treating accurately machined dip-roll sleeve;
5. will be until accurately machined dip-roll sleeve behind 1080 ℃ of insulation 3h, carry out oil quenchinng, the quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 150 ℃ behind 580 ℃ of insulation 6h, last precision work obtains the finished product dip-roll sleeve of specified dimension and precision.The chemical composition of dip-roll sleeve sees Table 1, and the mechanical property of dip-roll sleeve sees Table 2.
Embodiment 2:
Use the electrosmelting dip-roll sleeve, its manufacturing technology steps is:
1. with ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten clear rear ferrosilicon and the ferromanganese of adding of molten steel, continue to be warming up to 1609 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, come out of the stove when after the stokehold adjusting component is qualified temperature being risen to 1647 ℃;
2. in the molten steel tapping process, tapping 55% the time when molten steel, is 5 ~ 8% Y with mass percent, 7 ~ 10% Mg, and 40 ~ 44% Si, surplus is the yttrium based heavy rare earths magnesium ferro-silicon of Fe and through 350 ℃ of baked KMnO
4Contain the potassium material, tight with the stalloy coating of thickness 0.25mm, then throw away into ladle with stream;
3. adopt lost-foam casting method cast dip-roll sleeve, the pouring molten steel temperature is 1486 ℃;
4. pour into a mould the air cooling dip-roll sleeve of unpacking after 0.5 hour, spruing, cleaning undesirable root, overlap, burr carry out roughing subsequently, obtain treating accurately machined dip-roll sleeve;
5. will be until accurately machined dip-roll sleeve behind 1100 ℃ of insulation 1h, carry out oil quenchinng, the quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 180 ℃ behind 550 ℃ of insulation 8h, last precision work obtains the finished product dip-roll sleeve of specified dimension and precision.The chemical composition of dip-roll sleeve sees Table 1, and the mechanical property of dip-roll sleeve sees Table 2.
Embodiment 3:
Use the electrosmelting dip-roll sleeve, its manufacturing technology steps is:
1. with ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten clear rear ferrosilicon and the ferromanganese of adding of molten steel, continue to be warming up to 1599 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, come out of the stove when after the stokehold adjusting component is qualified temperature being risen to 1633 ℃;
2. in the molten steel tapping process, tapping 48% the time when molten steel, is 5 ~ 8% Y with mass percent, 7 ~ 10% Mg, and 40 ~ 44% Si, surplus is the yttrium based heavy rare earths magnesium ferro-silicon of Fe and through 350 ℃ of baked KMnO
4Contain the potassium material, tight with the stalloy coating of thickness 0.20mm, then throw away into ladle with stream;
3. adopt centre spinning method cast dip-roll sleeve, the pouring molten steel temperature is 1459 ℃;
4. pour into a mould the air cooling dip-roll sleeve of unpacking after 1.5 hours, cleaning undesirable root, overlap, burr carry out roughing subsequently, obtain treating accurately machined dip-roll sleeve;
5. will be until accurately machined dip-roll sleeve behind 1090 ℃ of insulation 2h, carry out oil quenchinng, the quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 160 ℃ behind 560 ℃ of insulation 7h, last precision work obtains the finished product dip-roll sleeve of specified dimension and precision.The chemical composition of dip-roll sleeve sees Table 1, and the mechanical property of dip-roll sleeve sees Table 2.
The chemical composition of table 1 dip-roll sleeve (massfraction, %)
The mechanical property of table 2 dip-roll sleeve
Adopt the present invention to make dip-roll sleeve, successful Application on many pot galvanize units at home, dip-roll sleeve hardness of the present invention is high, red hardness is good, has good high temperature resistance wearing and tearing ability, in addition, the present invention contains the Fe that 35-40% is net distribution because of the adding of boron in the metallographic structure
2The B phase can obviously improve the molten zinc corrosion resistant ability of dip-roll sleeve.The invention dip-roll sleeve has also added an amount of yttrium, magnesium, calcium, titanium, niobium, potassium, a main deoxidation, desulfurization, thinning microstructure, improve the effect of inclusion morphology and distribution, be conducive to improve the mechanical property of dip-roll sleeve, guarantee can not occur in the dip-roll sleeve use procedure to ftracture and peel off, guaranteed the safe handling of dip-roll sleeve.Under identical applying working condition, dip-roll sleeve of the present invention improves 9-10 doubly than 316L stainless steel dip-roll sleeve work-ing life, and production cost is suitable with 316L stainless steel dip-roll sleeve.Apply dip-roll sleeve of the present invention, can improve hot-galvanizing machine group job rate, alleviate labor strength, have good economic and social benefit.
Claims (5)
1. the manufacture method of an anti scuffing dip-roll sleeve is characterized in that, the massfraction % of dip-roll sleeve chemical composition is as follows: 0.15-0.28C, 3.0-3.5B, 2.0-2.5Cr, 9.5-10.0W, 2.5-3.0Mo, 0.65-0.80Al, 1.20-1.50Si, 0.25-0.50Mn, 0.04-0.08Y, 0.06-0.10Ti, 0.06-0.10Nb, 0.03-0.06Ca, 0.05-0.08Mg, 0.08-0.12K, S＜0.04, P＜0.05, surplus is Fe;
The preparation method adopts electrosmelting, specifically may further comprise the steps:
1. with ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten clear rear ferrosilicon and the ferromanganese of adding of molten steel, continue to be warming up to 1590～1610 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, come out of the stove when after the stokehold adjusting component is qualified temperature being risen to 1620～1650 ℃;
2. step molten steel is 1. come out of the stove and is poured in the process of ladle, when the molten steel tapping reaches 40-60%, will coat tight yttrium based heavy rare earths magnesium ferro-silicon again and coat the tight potassium material that contains and throw away into ladle with stream;
3. adopt centre spinning method or lost-foam casting method with step 2. molten steel carry out dip-roll sleeve cast, wherein when adopting centre spinning method to pour into a mould dip-roll sleeve, the pouring molten steel temperature is 1440-1460 ℃; When adopting lost-foam casting method cast dip-roll sleeve, the pouring molten steel temperature is 1470-1490 ℃;
4. pour into a mould the air cooling dip-roll sleeve of unpacking after 0.5～2.0 hour, then adopt the dip-roll sleeve of lost-foam casting method cast to need spruing, cleaning undesirable root, overlap, burr carry out roughing subsequently, obtain treating accurately machined dip-roll sleeve;
Adopt the dip-roll sleeve of centre spinning method cast then only to need cleaning undesirable root, overlap, burr, carry out subsequently roughing, obtain treating accurately machined dip-roll sleeve;
5. will be until accurately machined dip-roll sleeve behind 1080-1100 ℃ of insulation 1-3h, carry out oil quenchinng, the quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 150-180 ℃ behind 550-580 ℃ of insulation 6-8h, last precision work obtains the finished product dip-roll sleeve of specified dimension and precision.
2. according to the method for claim 1, it is characterized in that, step coats in 2. and contains the potassium material and the used material of yttrium based heavy rare earths magnesium ferro-silicon is the stalloy of thickness 0.10-0.25mm.
3. according to the method for claim 1, it is characterized in that, the mass percent of the yttrium based heavy rare earths magnesium ferro-silicon of step described in 2. is 5 ~ 8% Y, 7 ~ 10% Mg, and 40 ~ 44% Si, surplus is Fe.
4. according to the method for claim 1, it is characterized in that, the described potassium material that contains is through 350 ℃ of baked KMnO
4
5. according to the prepared a kind of anti scuffing dip-roll sleeve of the either method of claim 1-4.
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