CN102851597B - 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 dip-roll sleeve technical field.
Background technology
Continuous hot galvanizing produce time, steel band changes direction by the sinking roller being immersed in zinc liquid (temperature is 460 ~ 480 ℃), from enter zinc pot soak zinc become zinc pot, zinc coating solidifies cooling.The sinking roller rotating with the motion of steel band is supported on anchor by the axle sleeve of both sides, and axle sleeve plays sliding surface bearing.The material, axle sleeve that pot galvanize unit is used at present both at home and abroad, 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, promote the use of difficulty.And Cr-Ni steel alloy and austenitic heat-resistance steel axle sleeve have formed the Al containing the about 13at% of Zn on surface owing to corroded by zinc liquid
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 subject to violent abrasive wear.Axle sleeve is subject 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 material, axle sleeve anti-Zn solution corrodes, the 2nd, improve the hardness of axle sleeve own to alleviate abrasive wear degree.Because axle sleeve is worked in zinc liquid, therefore require material should have higher hot hardness.Axle sleeve adopts electric-arc welding to be arranged on anchor and sinking roller, also adopts electric-arc welding that axle sleeve thinnest part is hardening cracked and unloaded after 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, stainless steel base 1 and cobalt-based laser cladding layer 2 two portions, consists of, and cobalt-based laser cladding layer 2 covers on stainless steel base 1.This invention also provides the manufacture method of dip-roll sleeve, it is characterized in that operation is as follows: 1. processing stainless steel matrix 1; 2. mechanical workout; 3. laser melting coating, on stainless steel base 1 cylindrical, first cladding prime coat, then cladding functional layer; Laser cladding technological parameter is: laser power 3000～5000W, and spot diameter is 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; Resisting corrosion of molten zinc bed thickness, more than can reaching 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.In Co base solder, contain Co, Si, Cu, Cr, B, W, C and binding agent, raw material can be simple substance powder or alloy or compound, can be also 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: pottery is high with the bonding strength of metal, resisting corrosion of molten zinc bed thickness, more than can reaching 2mm, has extended 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 a kind of sinking roller used for hot dip galvanizing and the bearing shell at stabilizing roller two ends and the composite overlaying method of axle sleeve, its matrix adopting stainless steel and iron sill, on its matrix, heap is welded with Co-base alloy material working face, the step adopting is: by substrate preheating to 500～650 ℃ of the bearing shell of making and axle sleeve, 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 heap is welded and axle sleeve are heated to 500～650 ℃, insulation 1～3h, then with the speed slow cooling of 10-50 ℃/h, arrive room temperature, finally the bearing shell to composite overlaying and axle sleeve carry out roughing and precision work, 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, there is enough matrixes and working face bonding strength, and good corrosion-resistant, abrasion resistance properties, improved work-ing life and the reliability of sinking roller or stabilizing roller 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 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, and its chemical composition is (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, after melting, casting, carries out stress relief annealing processing at 250～300 ℃, and multielement ferroboron has excellent molten zinc corrosion resistant performance, but exist to wear no resistance, waits deficiency, and welding property is 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, 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 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 corrosive wear of zinc solution environment, there is good result of use, but this invention material exists fragility large, in use easy to crack and peel off and welding property poor wait deficiency.
Summary of the invention
The object of the invention is to provide 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 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 appropriate 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 is Fe.
Dip-roll sleeve electrosmelting of the present invention, its manufacturing technology steps is:
1. by ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon and ferromanganese after melting clearly, continue to be warming up to 1590～1610 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, while temperature being risen to 1620～1650 ℃ after stokehold adjusting component is qualified, come out of the stove;
2. step molten steel is 1. come out of the stove and is poured in the process of ladle, when molten steel tapping reaches 40-60%, then by coated tight yttrium based heavy rare earths magnesium ferro-silicon and coated tight throwing away into ladle with stream containing potassium material;
3. adopt centre spinning method or lost-foam casting method by step 2. molten steel carry out dip-roll sleeve cast, wherein, when adopting centre spinning method cast dip-roll sleeve, pouring molten steel temperature is 1440-1460 ℃; When adopting lost-foam casting method cast dip-roll sleeve, pouring molten steel temperature is 1470-1490 ℃;
4. pour into a mould unpacking air cooling dip-roll sleeve 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, obtains treating accurately machined dip-roll sleeve;
Adopt the dip-roll sleeve of centre spinning method cast 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 after 1080-1100 ℃ of insulation 1-3h, carry out oil quenchinng, quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 150-180 ℃ after 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, coated described in 2. of step refers to that to adopt the stalloy of thickness 0.10-0.25mm coated.
In another specific embodiment of the present invention, the Y that the mass percent of the yttrium based heavy rare earths magnesium ferro-silicon of step described in is 2. 5 ~ 8%, 7 ~ 10% Mg, 40 ~ 44% Si, surplus is Fe; Described is through 350 ℃ of baked KMnO containing potassium material
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 too 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 zinc liquid and bears corrosion and wearing and tearing, adds boron, is mainly the Fe in order to obtain molten zinc corrosion resistant excellent property
2b boride, boron content is too 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, in use, very easily breaks, and considers, and boron content is controlled to 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, in dip-roll sleeve, add tungsten and molybdenum, mainly to be enclosed within the fastness to wear under 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 dip-roll sleeve, except rising 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, extend the work-ing life of dip-roll sleeve, add-on is too much, smelting molten steel difficulty, and the suitable add-on of aluminium should be controlled at 0.65-0.80%.
Chromium: chromium solid solution is in matrix, there is good raising matrix hardening capacity ability, in addition, chromium also has the good oxidation-resistance property in material heat treatment process that improves, add-on is too much, causes carbide quantity to increase, and matrix carbon content declines, 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, silicon is strengthened matrix effect in addition, and add-on is too much, damages 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 appropriate 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 particularly obdurability of material, 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%, the suitable add-on of niobium should be controlled at 0.06-0.10%, 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%, the suitable add-on of potassium should be controlled at 0.08-0.12%.
Of the present invention is through 350 ℃ of baked KMnO containing potassium material
4.Before adding molten steel, KMnO
4through 350 ℃ of roastings, due to KMnO
4unstable, in roasting process, can there is following reaction:
Therefore, joining the main component containing potassium material in molten steel is MnO in fact
2, Mn
2o
3and K
2tri-kinds of materials of O, and K
2under molten steel high temperature action, can there is again following reaction in O:
Effect of the present invention:
(1) with the present invention, manufacture the dip-roll sleeve in pot galvanize liquation, there is hardness high, the feature 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 appropriate 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 to produce, 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 of manufacturing with 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, apply respond well.
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1:
Use electrosmelting dip-roll sleeve, its manufacturing technology steps is:
1. by ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon and ferromanganese after melting clearly, continue to be warming up to 1592 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, while temperature being risen to 1623 ℃ after stokehold adjusting component is qualified, come out of the stove;
2. in molten steel tapping process, when molten steel is tapped 42% time, the Y that is 5 ~ 8% by mass percent, 7 ~ 10% Mg, 40 ~ 44% Si, the yttrium based heavy rare earths magnesium ferro-silicon that surplus is Fe and through 350 ℃ of baked KMnO
4containing potassium material, coated tight with the stalloy of thickness 0.10mm, then with stream, throw away into ladle;
3. adopt centre spinning method cast dip-roll sleeve, pouring molten steel temperature is 1445;
4. pour into a mould unpacking air cooling dip-roll sleeve after 2.0 hours, cleaning undesirable root, overlap, burr, carry out roughing subsequently, obtains treating accurately machined dip-roll sleeve;
5. will be until accurately machined dip-roll sleeve after 1080 ℃ of insulation 3h, carry out oil quenchinng, quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 150 ℃ after 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 is in Table 1, and the mechanical property of dip-roll sleeve is in Table 2.
Embodiment 2:
Use electrosmelting dip-roll sleeve, its manufacturing technology steps is:
1. by ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon and ferromanganese after melting clearly, continue to be warming up to 1609 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, while temperature being risen to 1647 ℃ after stokehold adjusting component is qualified, come out of the stove;
2. in molten steel tapping process, when molten steel is tapped 55% time, the Y that is 5 ~ 8% by mass percent, 7 ~ 10% Mg, 40 ~ 44% Si, the yttrium based heavy rare earths magnesium ferro-silicon that surplus is Fe and through 350 ℃ of baked KMnO
4containing potassium material, coated tight with the stalloy of thickness 0.25mm, then with stream, throw away into ladle;
3. adopt lost-foam casting method cast dip-roll sleeve, pouring molten steel temperature is 1486 ℃;
4. pour into a mould unpacking air cooling dip-roll sleeve after 0.5 hour, spruing, cleaning undesirable root, overlap, burr, carry out roughing subsequently, obtains treating accurately machined dip-roll sleeve;
5. will be until accurately machined dip-roll sleeve after 1100 ℃ of insulation 1h, carry out oil quenchinng, quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 180 ℃ after 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 is in Table 1, and the mechanical property of dip-roll sleeve is in Table 2.
Embodiment 3:
Use electrosmelting dip-roll sleeve, its manufacturing technology steps is:
1. by ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon and ferromanganese after melting clearly, continue to be warming up to 1599 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, while temperature being risen to 1633 ℃ after stokehold adjusting component is qualified, come out of the stove;
2. in molten steel tapping process, when molten steel is tapped 48% time, the Y that is 5 ~ 8% by mass percent, 7 ~ 10% Mg, 40 ~ 44% Si, the yttrium based heavy rare earths magnesium ferro-silicon that surplus is Fe and through 350 ℃ of baked KMnO
4containing potassium material, coated tight with the stalloy of thickness 0.20mm, then with stream, throw away into ladle;
3. adopt centre spinning method cast dip-roll sleeve, pouring molten steel temperature is 1459 ℃;
4. pour into a mould unpacking air cooling dip-roll sleeve after 1.5 hours, cleaning undesirable root, overlap, burr, carry out roughing subsequently, obtains treating accurately machined dip-roll sleeve;
5. will be until accurately machined dip-roll sleeve after 1090 ℃ of insulation 2h, carry out oil quenchinng, quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 160 ℃ after 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 is in Table 1, and the mechanical property of dip-roll sleeve is in Table 2.
The chemical composition (massfraction, %) of table 1 dip-roll sleeve
The mechanical property of table 2 dip-roll sleeve
Adopt the present invention to manufacture 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 adds because of boron, contains the Fe that 35-40% is net distribution in metallographic structure
2b phase, can obviously improve the molten zinc corrosion resistant ability of dip-roll sleeve.Invention dip-roll sleeve has also added appropriate 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 to there will not be and ftracture and peel off in dip-roll sleeve use procedure, 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, there is good economic and social benefit.
Claims (5)
1. a manufacture method for 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;
Preparation method adopts electrosmelting, specifically comprises the following steps:
1. by ordinary scrap steel, low carbon ferrochromium, carburelant, ferrotungsten, the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon and ferromanganese after melting clearly, continue to be warming up to 1590～1610 ℃, add aluminium deoxidation and alloying, then add successively ferro-boron, ferro-niobium, ferrotianium and silicocalcium, while temperature being risen to 1620～1650 ℃ after stokehold adjusting component is qualified, come out of the stove;
2. step molten steel is 1. come out of the stove and is poured in the process of ladle, when molten steel tapping reaches 40-60%, then by coated tight yttrium based heavy rare earths magnesium ferro-silicon and coated tight throwing away into ladle with stream containing potassium material;
3. adopt centre spinning method or lost-foam casting method by step 2. molten steel carry out dip-roll sleeve cast, wherein, when adopting centre spinning method cast dip-roll sleeve, pouring molten steel temperature is 1440-1460 ℃; When adopting lost-foam casting method cast dip-roll sleeve, pouring molten steel temperature is 1470-1490 ℃;
4. pour into a mould unpacking air cooling dip-roll sleeve 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, obtains treating accurately machined dip-roll sleeve;
Adopt the dip-roll sleeve of centre spinning method cast 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 after 1080-1100 ℃ of insulation 1-3h, carry out oil quenchinng, quenching oil temperature is controlled at 25-60 ℃, air cooling when then stove is chilled to 150-180 ℃ after 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 is coated in is 2. the stalloy of thickness 0.10-0.25mm containing potassium material and yttrium based heavy rare earths magnesium ferro-silicon material used.
3. according to the method for claim 1, it is characterized in that, the Y that the mass percent of the yttrium based heavy rare earths magnesium ferro-silicon of step described in is 2. 5 ~ 8%, 7 ~ 10% Mg, 40 ~ 44% Si, surplus is Fe.
4. according to the method for claim 1, it is characterized in that, described is through 350 ℃ of baked KMnO containing potassium material
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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| CN108547935A (en) * | 2018-07-04 | 2018-09-18 | 南京高精齿轮集团有限公司 | Tooth-like connection axle sleeve and its processing method and lubrication system |
| CN109773372A (en) * | 2019-03-04 | 2019-05-21 | 辽宁工程技术大学 | A kind of manual electric arc welding coating of build-up welding bar formula and welding rod preparation method |
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| EP1832665A1 (en) * | 2004-09-13 | 2007-09-12 | Hitachi Metals, Ltd. | Centrifugally cast external layer for rolling roll and method for manufacture thereof |
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