CN103722157A - Production method of ultra-strong wear-resisting double-alteration centrifugal composite roller - Google Patents
Production method of ultra-strong wear-resisting double-alteration centrifugal composite roller Download PDFInfo
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- CN103722157A CN103722157A CN201410000685.XA CN201410000685A CN103722157A CN 103722157 A CN103722157 A CN 103722157A CN 201410000685 A CN201410000685 A CN 201410000685A CN 103722157 A CN103722157 A CN 103722157A
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Abstract
The invention discloses a production method of an ultra-strong wear-resisting double-alteration centrifugal composite roller. The production method includes the following production steps: (1) producing iron casting liquid of high wear-resisting alloy with a double-alteration processing method, (2) casting a hollow tubular roller face outer layer of the roller with a centrifugal casting method, (3) adding O-type anti-oxidation covering slag into the inner surface of the hollow tubular roller face outer layer, (4) placing the roller face outer layer in a sand box to form a roller cavity, forming a runner in one side of the roller cavity of the sand box, and enabling the lower portion of the runner to be communicated with a bottom circular cavity tangent line of the roller cavity, (5) injecting the iron casting liquid into the roller cavity through the runner until the roller cavity is filled with the iron casting liquid for cooling and molding, and obtaining a composite ball-milling roller blank, and (6) conducting finish machining on the blank, and obtaining the centrifugal composite ball-milling roller. According to the production method, the hardness of the materials and the capacity for machining hardening are improved, and therefore a roller collar of the roller face outer layer has the high wear-resisting performance; meanwhile, the O-type anti-oxidation covering slag is added, the connectivity of the roller collar and a roller shaft is improved, and the service life of the roller is prolonged.
Description
Technical field
The present invention relates to a kind of production method of roll, relate in particular to the production method of the two rotten centrifugal compound rolls of a kind of superpower wear-resistant.
Background technology
Roll is the vitals of roll forming.Roll needs to bear larger roll-force in the operation of rolling, so the production of roll is all passed through to cast one-time formed.Roll is produced and is cast by roll casting mould.Roll casting mould comprises running channel and roll die cavity, current known roll casting mould arranges cast gate on top, cast gate is directly connected with roll die cavity top, molten steel enters in mould from cast gate, fill with gradually mould, for molten steel smaller volume after preventing from casting, shrink, foundry goods can not be met the demands, in cast gate, inject a certain amount of molten steel and fill up.The shortcoming of above-mentioned roll casting mould is because molten steel directly enters from the top of roll die cavity, directly rushes at the bottom of roll die cavity, and the quality of molten steel is larger, the impulsive force producing is larger, the bottom of fragile roll die cavity, has reduced the quality of product, has also reduced production qualification rate.Simultaneously, because molten steel enters die cavity from top, during cast, some waste residues will be stayed in molten steel, make the roll strength that casts out not very good, have affected the quality of product.
Roll is widely used in the Rolling Production of steel mill simultaneously.Roll bears larger extruding force and closely pushes and contact with treating rolled material when rolling, makes that skin of the roll easily consumes, rapid wear.Along with the development of shape rolling technique, the raising of mill speed, application leader's expansion, especially to rolling large-size bar, wire rod and tubing, traditional monoblock type hard closes roll because its weight is large, difficulty of processing is large, percent defective is high, explosive roller again during work, thereby existence is produced and use cost is high, alloy resource is wasted large shortcoming.
In use, also usually there is the problem that outer collars is separated with roll shaft in roll simultaneously, causes the service life of roll short, and serious even can bring potential safety hazard.
Summary of the invention
The object of the invention is to solve that roll quality is poor, service life is short, production and the high problem of use cost, the production method of the two rotten centrifugal compound rolls of a kind of superpower wear-resistant is provided.
The technical solution used in the present invention is: the production method of the two rotten centrifugal compound rolls of a kind of superpower wear-resistant, comprise following production stage: (1) adopts two metamorphism treatment methods to produce the cast iron liquid of high-wear-resistant alloy: first carry out processing in stove, add after manganese steel adjusts cast iron liquid, in molten bath, add the rare earth alloy containing Re that accounts for cast iron liquid weight 0.068～0.080% successively, account for the alum slag of cast iron liquid weight 2.1～2.5%; Before tapping, add the aluminium that accounts for cast iron liquid weight 0.16～0.20%; Then carrying out stove processes outward, in ladle, add the silico-calcium that accounts for cast iron liquid weight 0.042～0.049%, account for the rare earth alloy containing Re of cast iron liquid weight 0.134～0.168%, account for the ferrotianium of cast iron liquid weight 0.02～0.03%, account for the zinc of cast iron liquid weight 0.0061～0.0079%; (2) adopt centrifugal casting, the roll surface that waters Casting Roller hollow tubular is outer; (3) the outer inner surface of roll surface to hollow tubular adds " O " type protection against oxidation slag; (4) roll surface is placed on outward and in sandbox, forms roll die cavity, in roll die cavity one side of sandbox, runner is set, runner bottom communicates with the bottom cylindrical cavity tangent line of roll die cavity; (5) cast iron liquid is injected to roll die cavity from runner, until roll die cavity is filled with cooling forming, obtain composite ball-milling roll blank; (6) blank is carried out to fine finishining, obtain centrifugal compound ball milling roll.
As a further improvement on the present invention, described smelting furnace is intermediate frequency furnace.
As a further improvement on the present invention, described " O " type protection against oxidation slag is glass dregs.
As of the present invention, further improve, the cast iron liquid of described step (5) is high-strength alloy spheroidal graphite cast-iron.
The beneficial effect that the present invention adopts is: the present invention has obviously improved form and the size of carbide in as-cast structure, increased the crystallization nuclei of carbide, the crystal boundary that has reduced carbide distributes, refinement carbide, increase thus the hardness of material, the ability of work hardening, the skin of the roll collars making obtains higher anti-wear performance; Add " O " type protection against oxidation slag simultaneously, improved the connectivity of collars and roll shaft, extended the service life of roll.
The specific embodiment
Below the present invention is described further.
The present invention early stage cast iron pendular ring joint adopt Re-Ca-Ti-Al multielement to meet alterant to the processing of going bad of cast iron liquid, the rotten advantage of multielement is because alterant element has different separately physical characteristics and chemical characteristic, therefore cast iron liquid carry out in rotten process and the cast iron liquid process of setting that you carry out at casting mold in along with the variation of temperature, these complex elements will carry out going bad to cast iron liquid successively in order, thereby extended the effective time of metamorphic process, and the modification effect of each element can be accomplished a kind of effect bringing out the best in each other.When the present invention simultaneously processes on the turn, also adopt V slag-Ti-Zn multielement composite inoculant to carry out breeding cast iron liquid; The advantage that multielement breeds is in cast iron liquid that the formation of high-melting-point carbide crystallization nuclei and the distribution of some make the crystallization nuclei of carbide obviously be increased and make and on crystal grain and crystal boundary, obtains distributing more uniformly, so not only can change the form of carbide but also carbide is diminished and further strengthened the tendency that generates a shape.
Its concrete steps are as follows: two metamorphism treatment methods are produced the cast iron liquid of high-wear-resistant alloy: first carry out processing in stove, add after manganese steel adjusts cast iron liquid, in molten bath, add the rare earth alloy containing Re that accounts for cast iron liquid weight 0.068～0.080% successively, account for the alum slag of cast iron liquid weight 2.1～2.5%; Before tapping, add the aluminium that accounts for cast iron liquid weight 0.16～0.20%; Then carrying out stove processes outward, in ladle, add the silico-calcium that accounts for cast iron liquid weight 0.042～0.049%, account for the rare earth alloy containing Re of cast iron liquid weight 0.134～0.168%, account for the ferrotianium of cast iron liquid weight 0.02～0.03%, account for the zinc of cast iron liquid weight 0.0061～0.0079%.
After adopting two rotten methods to cast iron liquid completion of processing, start casting.During casting, adopt centrifugal casting to water the roll surface skin collars of Casting Roller hollow tubular.Spun casting collars can guarantee that foundry goods inside is closely knit, and anti-wear performance is good.For guaranteeing that outer collars and inner roll shaft can be combined closely, can not cause junction fracture, to collars inner surface, put into glass dregs; Glass dregs belongs to a kind of of " O " type protection against oxidation slag, has a little cheap.The object of putting into " O " type protection against oxidation slag is to prevent that collars inner surface is oxidized, thereby has destroyed the connectivity of collars and roll shaft.
After adding and guaranteeing that collars inner surface can be not oxidized after glass dregs, collars is placed in and in sandbox, forms roll die cavity, in roll die cavity one side of sandbox, runner is set, the bottom cylindrical cavity tangent line of runner bottom and roll die cavity is come round.Cast iron liquid is injected to roll die cavity from runner, until roll die cavity fills with, cooling forming, thus obtain composite ball-milling roll blank.Cast iron liquid used herein, is the good steel liquid of toughness, and the liquid after the melting of high-strength alloy nodular cast iron for example can make roll its roll shaft easy fracture not at work.Roll shaft adopts the pouring-in tangential casting in bottom, can produce centrifugal rotary tension force, and waste residue and gas are discharged from top, makes roll shaft pure, has greatly increased the intensity of roll.
Finally, breaker roll blank carries out retrofit, obtains polishing roll.
In the present invention, the equipment of melting is intermediate frequency furnace, and intermediate frequency heating speed is fast, production efficiency is high, the de-charcoal of oxidation is few, save material and cost, extend die life, and especially homogeneous heating, the minimum feature of the core table temperature difference can better coordinate this production method.
Those skilled in the art should know; protection scheme of the present invention is not limited only to the above embodiments; can also on the basis of above-described embodiment, carry out various permutation and combination and conversion; under the prerequisite without prejudice to spirit of the present invention, the various conversion that the present invention is carried out all drop in protection scope of the present invention.
Claims (4)
1. the production method of the two rotten centrifugal compound rolls of a superpower wear-resistant, it is characterized in that comprising following production stage: (1) adopts two metamorphism treatment methods to produce the cast iron liquid of high-wear-resistant alloy: first carry out processing in stove, add after manganese steel adjusts cast iron liquid, in molten bath, add the rare earth alloy containing Re that accounts for cast iron liquid weight 0.068～0.080% successively, account for the alum slag of cast iron liquid weight 2.1～2.5%; Before tapping, add the aluminium that accounts for cast iron liquid weight 0.16～0.20%; Then carrying out stove processes outward, in ladle, add the silico-calcium that accounts for cast iron liquid weight 0.042～0.049%, account for the rare earth alloy containing Re of cast iron liquid weight 0.134～0.168%, account for the ferrotianium of cast iron liquid weight 0.02～0.03%, account for the zinc of cast iron liquid weight 0.0061～0.0079%;
(2) adopt centrifugal casting, the roll surface that waters Casting Roller hollow tubular is outer; (3) the outer field inner surface of roll surface to hollow tubular adds " O " type protection against oxidation slag; (4) roll surface is placed on outward and in sandbox, forms roll die cavity, in roll die cavity one side of sandbox, runner is set, runner bottom communicates with the bottom cylindrical cavity tangent line of roll die cavity; (5) cast iron liquid is injected to roll die cavity from runner, until roll die cavity is filled with cooling forming, obtain composite ball-milling roll blank; (6) blank is carried out to fine finishining, obtain centrifugal compound ball milling roll.
2. the production method of the two rotten centrifugal compound rolls of a kind of superpower wear-resistant according to claim 1, is characterized in that described smelting furnace is intermediate frequency furnace.
3. the production method of the two rotten centrifugal compound rolls of a kind of superpower wear-resistant according to claim 1, is characterized in that described " O " type protection against oxidation slag is glass dregs.
4. according to the production method of the two rotten centrifugal compound rolls of a kind of superpower wear-resistant described in any one in claims 1 to 3, the cast iron liquid that it is characterized in that described step (5) is high-strength alloy spheroidal graphite cast-iron.
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| CN201410000685.XA CN103722157A (en) | 2014-01-02 | 2014-01-02 | Production method of ultra-strong wear-resisting double-alteration centrifugal composite roller |
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| CN201410000685.XA CN103722157A (en) | 2014-01-02 | 2014-01-02 | Production method of ultra-strong wear-resisting double-alteration centrifugal composite roller |
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Citations (7)
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| CN87104407A (en) * | 1987-06-27 | 1987-12-23 | 邯郸建华钢管厂 | Rare-earth low-chrome cast iron for making grinding ball and production technique |
| JPH05318071A (en) * | 1992-05-14 | 1993-12-03 | Kubota Corp | Two-layered composite wear resistant pipe and its production |
| CN101082096A (en) * | 2007-07-06 | 2007-12-05 | 杨永刚 | Spheroidal graphite cast iron, grey iron inoculant and method for product preparation and application as smelting cast iron |
| CN101195158A (en) * | 2007-11-01 | 2008-06-11 | 鞍钢重型机械有限责任公司 | Process for manufacturing modified type infinity chill hardening compound cast iron roll of nichrome molybdenum |
| CN101289723A (en) * | 2007-04-19 | 2008-10-22 | 铜陵市大明玛钢有限责任公司 | Novel composite modifier for austenitic manganese steel |
| CN101289722A (en) * | 2007-04-19 | 2008-10-22 | 铜陵市大明玛钢有限责任公司 | Double- modification method for advanced austenitic manganese steel |
| CN102389963A (en) * | 2011-11-17 | 2012-03-28 | 铜陵市大成轧辊有限责任公司 | Production method of superstrong wear-resistant centrifugal composite roll |
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2014
- 2014-01-02 CN CN201410000685.XA patent/CN103722157A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104407A (en) * | 1987-06-27 | 1987-12-23 | 邯郸建华钢管厂 | Rare-earth low-chrome cast iron for making grinding ball and production technique |
| JPH05318071A (en) * | 1992-05-14 | 1993-12-03 | Kubota Corp | Two-layered composite wear resistant pipe and its production |
| CN101289723A (en) * | 2007-04-19 | 2008-10-22 | 铜陵市大明玛钢有限责任公司 | Novel composite modifier for austenitic manganese steel |
| CN101289722A (en) * | 2007-04-19 | 2008-10-22 | 铜陵市大明玛钢有限责任公司 | Double- modification method for advanced austenitic manganese steel |
| CN101082096A (en) * | 2007-07-06 | 2007-12-05 | 杨永刚 | Spheroidal graphite cast iron, grey iron inoculant and method for product preparation and application as smelting cast iron |
| CN101195158A (en) * | 2007-11-01 | 2008-06-11 | 鞍钢重型机械有限责任公司 | Process for manufacturing modified type infinity chill hardening compound cast iron roll of nichrome molybdenum |
| CN102389963A (en) * | 2011-11-17 | 2012-03-28 | 铜陵市大成轧辊有限责任公司 | Production method of superstrong wear-resistant centrifugal composite roll |
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| 王仲珏: "低铬白口铸铁复合变质的作用及动力学效应", 《兵器材料科学与工程》 * |
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Application publication date: 20140416 |