CN108277436A - A kind of high-toughness wear-resistant bimetallic composite roll set and preparation method - Google Patents

A kind of high-toughness wear-resistant bimetallic composite roll set and preparation method Download PDF

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Publication number
CN108277436A
CN108277436A CN201810259714.2A CN201810259714A CN108277436A CN 108277436 A CN108277436 A CN 108277436A CN 201810259714 A CN201810259714 A CN 201810259714A CN 108277436 A CN108277436 A CN 108277436A
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composite roll
toughness wear
bimetallic composite
resistant
sand mold
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CN108277436B (en
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佟伟平
李永存
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Northeastern University China
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Northeastern University China
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D5/00—Heat treatments of cast-iron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/06—Cast-iron alloys containing chromium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/06—Cast-iron alloys containing chromium
    • C22C37/08—Cast-iron alloys containing chromium with nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

A kind of high-toughness wear-resistant bimetallic composite roll set and preparation method, belong to wear-resistant material technical field.The high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve and housing realize metallurgical binding, and housing wall thickness is that high-toughness wear-resistant bimetallic composite roll covers the 1/4~1/2 of overall wall thickness.Preparation method is：The casting of preset inner sleeve；The preparation and pretreatment of removable sand mold；The cast of high-strength wearable housing；High-toughness wear-resistant bimetallic composite roll covers the metallurgical binding of preset interior cover material and lagging material；The heat treatment of high-toughness wear-resistant bimetallic composite roll set, obtains high-toughness wear-resistant bimetallic composite roll set.This method reaches the diffusion of element, realizes good metallurgical binding.Through Overheating Treatment, the stress generated since the coefficient of expansion is different can be substantially eliminated, further strengthens high abrasion housing, reaches ideal composite effect, high-toughness wear-resistant bimetallic composite roll set comprehensive mechanical property is made to further increase.

Description

A kind of high-toughness wear-resistant bimetallic composite roll set and preparation method
Technical field
The invention belongs to wear-resistant material technical fields, and in particular to a kind of high-toughness wear-resistant bimetallic composite roll set and prepare Method.
Background technology
High-pressure roller mill is widely used in ore crushing and the crushing materials operation such as cement slurry and clinker, is a kind of new The energy-efficient disintegrating apparatus of type.Roller of High is in the process of powder ore, in the severe item such as high stress and abrasion Under part, it often will appear the accidents such as roll banding, crackle, peeling.Mainly there are wear-resistant material hardfacing roll surface, bimetal centrifugal casting at present Roll surface and hard alloy castingin roll surface.The wear-resistant material hardfacing roll surface prepared using technique for overlaying, although easy to operate, to operation Environmental requirement is simple, and wear-resistant material ingredient is controllable, but in use, crackle is easy tod produce between base material, is caused Roll surface material falls back, reduces the service life；Bimetal centrifugal casting roll surface easy tos produce the tissue defects such as hole, cracking, and It needs to use large scale equipment, easy tos produce danger；And carbide mosaic roll surface, although the two pairs of rollers of material can be effective against The abrasion in face, service life is substantially better than wear-resistant material hardfacing roll surface, but the production technology of the roll surface is extremely complex, the production cycle It is long, a large amount of manpower and materials are consumed, the cost of product is quite high；It is easy to cause falling off for stud in use, influences The service life of roll surface.
Invention content
In view of the deficiencies of the prior art, a kind of high-toughness wear-resistant bimetallic composite roll set of present invention offer and preparation method. It is preset inner sleeve with common middle low carbon steel or low-alloy steel, using high alloy material as the bimetallic composite roll of high-wearing feature housing Set.The technology of preparation method low production cost, simple for process, two kinds of materials are well combined in gained composite roll set, high abrasion The ingredient of housing is controllable, and even tissue is fine and close, and element is uniformly distributed, segregation-free, the gross imperfections such as flawless, stomata, tough Property improve while, wear-resisting property accesses larger improvement.Overcome wear-resistant material hardfacing roll surface, bimetal centrifugal casting roll surface With defect of the hard alloy castingin roll surface in terms of structure property；If there are a large amount of slag inclusion, gaps for compound interface, or outer Complete metallurgical binding is not achieved in set material and preset interior cover material, under subsequent heat treatment or applying working condition, acts on The stress of working lining cannot fast and effeciently to roller core transmit, to can it is cracked during heat treatment, burst apart or The accidents such as crack, peel off in use.This not only reduces the efficiency of roller mill, causes economic loss, again There can be security risk.
Requirement of the present invention according to roller set service condition and use environment, by design of alloy, the low-carbon in common The surface of steel or low-alloy steel, by way of cast, while ensureing high tenacity, preparing one layer has high intensity, height The material of wearability.And by subsequent heat treatment appropriate, material is made further to strengthen.The double gold prepared by this method Belong to composite roll set, by keeping the temperature at a certain temperature between preset inner sleeve and high abrasion housing, reaches the diffusion of element, realize good Good metallurgical binding.By subsequent heat treatment, can substantially eliminate due to coefficient of expansion difference and the stress of generation, and into One step strengthens high abrasion housing, reaches ideal composite effect, the synthesis mechanical property for making high-toughness wear-resistant bimetallic composite roll cover It can further increase.
A kind of high-toughness wear-resistant bimetallic composite roll set of the present invention, including preset inner sleeve and housing, described is preset interior The material of set is common middle low carbon steel or low-alloy steel, the mass percent for the element and each element that the material of housing includes For：C：1.0~3.5%, Si：0~2.0%, Cr：10~43%, Cu：0~1.5%, Mn：0~10%, Ni：0~1.0%, W： 0~20%, V：0~20%, Mo：0~20%, Ti:0~20%, Nb：0~5%, surplus be Fe and inevitable impurity, often Mass percent≤0.5% of kind impurity, preset inner sleeve and housing realize metallurgical binding, and housing wall thickness is that high-toughness wear-resistant is double Metal composite roller covers the 1/4~1/2 of overall wall thickness.
High-toughness wear-resistant bimetallic composite roll set prepared by the present invention, case hardness are 63~65HRC, impact flexibility 5 ~10J/mm2, the shear strength between preset inner sleeve and housing is 515~600MPa.
The high-toughness wear-resistant bimetallic composite roll set of the preparation of the present invention is particularly suitable in high-pressure roller mill.
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set of the present invention, specifically includes following steps：
Step 1, the casting of preset inner sleeve：
(1) common middle low carbon steel or low-alloy steel are selected, is poured into a mould according to common pouring technology, size requirement is obtained High-toughness wear-resistant bimetallic composite roll covers preset inner sleeve；
(2) surface that preset inner sleeve is covered to high-toughness wear-resistant bimetallic composite roll is surface-treated, and it is accurate to obtain size The smooth high-toughness wear-resistant bimetallic composite roll in surface covers preset inner sleeve；
Step 2, the preparation and pretreatment of sand mold are moved：
(1) sand mold raw material is weighed according to the ratio, using fire resisting material apparatus, manufactures concave structure sand mold, the size of sand mold is The matching size of pre-prepared high-toughness wear-resistant bimetallic composite roll set closes, specifically, the internal diameter of sand mold is that high-toughness wear-resistant is double The outer diameter of metal composite roller set, the height of sand mold is higher by 5~15% than the height that high-toughness wear-resistant bimetallic composite roll covers, meanwhile, The bottom of sand mold is arranged and high-toughness wear-resistant bimetallic composite roll covers the cylindrical pit of the identical size of preset inner sleeve outer diameter, pit Depth be preset inner sleeve height 3~8%；
(2) it by the sand mold cavity inner surface coating refractory material of preparation, is placed in baker and dries, it is cooling for use；
Step 3, the cast of high-strength wearable housing：
(1) it the high-toughness wear-resistant bimetallic composite roll that is prepared in step 1 is covered into preset inner sleeve is put into and prepared in step 2 In the cylindrical pit of sand mold, the two is pushed into high temperature furnace and is preheated, the casting mold after being preheated；Wherein, it preheats Temperature is 300 DEG C~700 DEG C, and preheating time is 2~8h；
(2) according to requirements, composition design is carried out to lagging material, according to component requirements, chooses lagging material, and will The raw material of lagging material is mixed, and lagging material mixture is obtained；
Wherein, according to requirements, the element for including of lagging material mixture and the mass percent of each element are： C：1.0~3.5%, Cr：10~43%, Cu：0~1.5%, Mn：0~10%, Ni：0~1.0%, W：0~20%, V：0~ 20%, Mo：0~20%, Ti：0~20%, Nb：0~5%, Si：0~2%, surplus is Fe and inevitable impurity；
(3) lagging material mixture is put into crucible, is melted in high temperature furnace, after melting and heat preservation, obtain lagging material Melt obtains the sand mold for being cast with lagging material by the casting mold of lagging material melt cast after preheat；Wherein, it melts Change the melting temperature that temperature is lagging material mixture or more, the melting and heat preservation time is 10~300min；
Step 4, high-toughness wear-resistant bimetallic composite roll covers the metallurgical binding of preset interior cover material and lagging material：
The sand mold for being cast with lagging material is again pushed into high temperature furnace at once and is kept the temperature, after heat preservation, is cooled to the furnace Room temperature obtains bimetallic composite roll set and sand mold after cooling；Wherein, holding temperature is 900~1400 DEG C, soaking time 20 ~300min；
Step 5, the heat treatment of high-toughness wear-resistant bimetallic composite roll set
(1) high-toughness wear-resistant bimetallic composite roll set is quenched, specially：
Bimetallic composite roll after cooling set and sand mold are warming up to 900~1100 DEG C, keep the temperature 120~1200min, then Bimetallic composite roll set is taken out from sand mold, it is compound to bimetallic after attachment sand mold cleaning on bimetallic composite roll set surface Roller set carries out air blast cooling to room temperature, obtains workpiece after cooling；
(2) workpiece after cooling is again pushed into high temperature furnace, after carrying out temper, cools to room temperature with the furnace, obtain High-toughness wear-resistant bimetallic composite roll set；Wherein, temperature is 300~600 DEG C, keeps the temperature 60~1200min.
In the step 1 (1), the common middle low carbon steel or low-alloy steel, toughness are 20~80J/mm2, tool Body is preferably one kind in Q235,20 steel, 20Cr steel, 40Cr steel, 40CrMo steel, 42CrMoV steel, 40 steel or 45 steel.
In the step 1 (2), the surface treatment, specially：High-toughness wear-resistant is removed using machining process Bimetallic composite roll covers the surface scale of preset inner sleeve, and clean surface is cleaned to alcohol, acetone or gasoline solution, And ensure that high-toughness wear-resistant bimetallic composite roll covers the dimensional accuracy of preset inner sleeve workpiece.
In the step 2 (1), the sand mold raw material includes for molding sand, clay and water, wherein by mass percentage, Molding sand is 75~85%, and clay is 10~15%, and surplus is water；The molding sand is zircon sand or one kind in emergy or two Kind mixing；
In the step 2 (1), the fire resisting material apparatus is preferably refractory brick.
In the step 2 (2), selected fireproof coating is alumina powder.
In the step 2 (2), the drying is 300~700 DEG C of dry 2~8h, and described is cooled to furnace cooling Or cooled to room temperature.
In the step 3 (2), the raw material of the lagging material includes rich chromium cast iron, graphite powder, silica flour, iron, molybdenum-iron One or more of alloy, ferro-tungsten, vanadium iron, ferromanganese powder, ferro-niobium powder, titanium-iron powder alloy mix.
In the step 3 (2), the raw material of the lagging material is mixed, specially by the raw material of lagging material Cut into block mixing.
The high-toughness wear-resistant bimetallic composite roll set and preparation method, basic principle of the present invention is as follows：
Wherein, in step 1, the preset interior cover material after over mechanical processing and cleaning obtains fresh machining table After being heated to austenitic area the counterdiffusion of element can occur with lagging material for face.In step 3, according to requirements not Together, the high chromium cast iron material of heterogeneity may be selected, and be properly added graphite on its basis and alloying element is strengthened.
A kind of high-toughness wear-resistant bimetallic composite roll set of the present invention and preparation method thereof, compared to the prior art, has Following features：
(1) preparation method of the invention has prepared cost costly high-strength in the cheap steel surface of good-toughness Wearing face is spent, a quarter that the thickness of housing only accounts for general thickness arrives half, and is heat-treated and insulating process company It is continuous to carry out, the energy is greatly saved, reduces the cost in production process.
(2) the high-toughness wear-resistant bi-material layers composite roll nested structure of preparation method of the invention is fine and close, and no hole is not sent out Existing field trash and gross segregation, and it has good uniformity.
(3) preparation method of the invention, easy to operate, process conditions require loose.
(4) preparation method of the invention, preset interior cover material and lagging material have reached good metallurgical binding, the two it Between there is very high shear strength, faying face does not observe microdefect without cracking under microscope.
(5) preparation method of the invention, it is preset inner sleeve, a variety of high chromium castings that can produce with the good common iron of toughness Iron-based material is housing, can obtain the good roller set of comprehensive performance, there are larger technical advantages compared with other modes of production.
(6) lagging material prepared by the present invention, passes through the strong carbides shape such as Cr, Mo, W, V, Mn, Ti of better quality score At the addition of element, the volume fraction of carbide in lagging material tissue is considerably increased, to make hardness, the wearability of material Apparent increase extends the service life of lagging material.
(7) preparation method of the invention is ensureing to obtain high intensity, high abrasion by the heat treatment process of quenching+tempering Property lagging material under the premise of, increase the toughness of roller case material, eliminate due to stress caused by quenching, it is multiple to being promoted The bond strength for closing roller set plays a positive role.
Description of the drawings
Preset inner sleeve structural schematic diagram after being poured into a mould in Fig. 1, the embodiment of the present invention 1；
The sand mould structure schematic diagram prepared in Fig. 2, the embodiment of the present invention 1；
The cast schematic diagram of housing in Fig. 3, the embodiment of the present invention 1；
High-toughness wear-resistant bimetallic composite roll set schematic diagram prepared by Fig. 4, the present invention；
Composite roll prepared by Fig. 5, the embodiment of the present invention 1 covers the scanning electron microscopic picture of preset inner sleeve and housing interface；
Hardness profile near composite roll set interface prepared by Fig. 6, the embodiment of the present invention 1；
Composite roll prepared by Fig. 7, the embodiment of the present invention 2 covers the scanning electron microscopic picture of preset inner sleeve and housing interface；
Composite roll prepared by Fig. 8, the embodiment of the present invention 3 covers the scanning electron microscopic picture of preset inner sleeve and housing interface；
Composite roll prepared by Fig. 9, the embodiment of the present invention 4 covers the scanning electron microscopic picture of preset inner sleeve and housing interface；
In attached drawing, 1 is preset inner sleeve, and 2 be sand mold, and 3 be pit, and 4 be housing.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail.
Embodiment 1
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve 1 and housing 4, preset inner sleeve 1 are good using toughness 20 good steel.
Wherein, 4 material of housing uses the high alloy housing that Cr, V strengthen, specially its chemical composition by weight percentage For：C：1.0%, Si：1.0%, Cr：10%, Mo：4%, surplus is Fe and inevitable impurity, the quality hundred of each impurity Divide ratio≤0.5%；
The chemical composition of the preset inner sleeve of 20 steel 1 is carbon containing 0.02wt%, and surplus is iron and inevitable alloying element.
In high-toughness wear-resistant bimetallic composite roll set, 4 wall thickness of housing is that high-toughness wear-resistant bimetallic composite roll covers total body wall Thick 1/4.
Impact flexibility 5J/mm after housing heat treatment2, the shearing between preset inner sleeve and housing reaches by force 535MPa.
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, specifically includes following steps：
Step 1, the casting of preset inner sleeve：
(1) preferable 20 steel of toughness is selected, it is pre- to carry out high-toughness wear-resistant bimetallic composite roll set according to common pouring technology The cast of inner sleeve is set, size is outer diameter 1.4m, internal diameter 1.0m, height 0.6m.
(2) it uses mechanical processing to remove the oxide skin that high-toughness wear-resistant bimetallic composite roll covers preset inner sleeve surface, uses Alcohol or acetone soln are cleaned to clean surface, and ensure the dimensional accuracy of workpiece.The high-toughness wear-resistant prepared is double Metal composite roller covers schematic diagram such as Fig. 1 of preset inner sleeve.
Step 2, the preparation and pretreatment of sand mold are moved：
(1) zircon sand, clay and suitable quantity of water, mixing is used to manufacture sand mold 2, sand mold will be made with the resistance to of some strength It is convenient that it is moved on firebrick.Wherein, by mass percentage, zircon sand 85%, clay 10%, surplus are water；
The internal diameter of sand mold is the outer diameter of high-toughness wear-resistant bimetallic composite roll set, the height gold more double than high-toughness wear-resistant of sand mold The height for belonging to composite roll set is high by 5%, and 2 schematic diagram of sand mold is as shown in Fig. 2, sand mold internal diameter is 0.6m, thickness 0.3m, at the bottom of sand mold Portion is recessed there are the cylindrical pit 3 for covering the identical size of preset inner sleeve outer diameter with high-toughness wear-resistant bimetallic composite roll in step 1 The depth in hole 3 is the 5% of preset inner sleeve height.
(2) after sand mold makes, mold cavity surface is coated with alumina setter coating, then sand mold is placed in baker and is dried, and waits for It is for use after cooling down.
Step 3, the cast of high-strength wearable housing：
(1) it the high-toughness wear-resistant bimetallic composite roll poured into a mould in step 1 is covered into preset inner sleeve is put into and prepared in step 2 In sand mold, the two is pushed into high temperature furnace and is preheated, the casting mold after being preheated；Wherein, preheating temperature is 700 DEG C, Preheating time is 2h.
(2) according to component requirements, using rich chromium cast iron, graphite, iron, vanadium iron as raw material, dispensing is carried out to lagging material, will be matched Several bulks that are cut into set are mixed to get lagging material mixture；
So that the element for including of lagging material mixture and the mass percent of each element are：C：1.0%, Si： 1.0%, Cr：10%, Mo：4%, surplus is Fe and inevitable impurity, mass percent≤0.5% of each impurity；
(3) lagging material mixture is put into crucible, is melted in high temperature furnace, after 10min is kept the temperature, obtain housing Material melt is poured into lagging material melt is obtained in the casting mold after preheating prefabricated in step 2, obtains being cast with outer The sand mold of cover material, wherein housing cast schematic diagram is shown in Fig. 3.
Step 4, high-toughness wear-resistant bimetallic composite roll covers the metallurgical binding of preset interior cover material and lagging material：
After cast, the sand mold for being cast with lagging material is again pushed into high temperature furnace keeps the temperature at once, temperature 900 DEG C, soaking time 300min.After heat preservation terminates, cools to sand mold with the furnace room temperature, it is compound to obtain bimetallic after cooling Roller covers and sand mold.
Step 5, the heat treatment of high-toughness wear-resistant bimetallic composite roll set
(1) high-toughness wear-resistant bimetallic composite roll set is quenched, specially：
Bimetallic composite roll after cooling set and sand mold are warming up to 1100 DEG C, 120min is kept the temperature, then answers bimetallic It closes roller set to take out from sand mold, clears up sand mold, bimetallic composite roll is covered and carries out air blast cooling to room temperature, obtains work after cooling Part；
(2) workpiece after cooling is again pushed into high temperature furnace, carries out temper, tempering process is 300 DEG C of heat preservations 1200min, furnace cooling after terminating obtain high-toughness wear-resistant bimetallic composite roll set, and schematic diagram is shown in Fig. 4.
The high-strength wearable composite roll set prepared through above-mentioned technique, is reached between preset inner sleeve and housing by elements diffusion Good metallurgical binding, Interface Microstructure are as shown in Figure 5；Under the premise of ensureing toughness, the hardness of housing is up to 65HRC, compound Nearby hardness profile is shown in that Fig. 6, the composite roll set that this method is prepared can meet the use of high-pressure roller mill at roller set interface Condition.
Embodiment 2
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve are good using toughness 20 steel.
Wherein, the high alloy housing that lagging material is strengthened using Cr, W, specially its chemical composition are by weight percentage： C：3.5%, Cr：10%, Cu：1.5%, Si：1.0%, W：10%, surplus be Fe and inevitable impurity, each impurity Mass percent≤0.5%；
The chemical composition of the preset inner sleeve of 20 steel is carbon containing 0.02wt.%, and surplus is iron and inevitable alloying element.
In high-toughness wear-resistant bimetallic composite roll set, housing wall thickness is that high-toughness wear-resistant bimetallic composite roll covers overall wall thickness 1/2.
Hardness after housing heat treatment is 65HRC, impact flexibility 5J/mm2, the shearing between preset inner sleeve and housing is strong Reach 560MPa.
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, specifically includes following steps：
Step 1, the casting of preset inner sleeve：
(1) preferable 20 steel of toughness is selected, it is pre- to carry out high-toughness wear-resistant bimetallic composite roll set according to common pouring technology The cast of inner sleeve is set, size is outer diameter 1.6m, internal diameter 1.0m, height 0.8m.
(2) it uses mechanical processing to remove the oxide skin that high-toughness wear-resistant bimetallic composite roll covers preset inner sleeve surface, uses Alcohol or acetone soln are cleaned to clean surface, and ensure the dimensional accuracy of workpiece, and high-toughness wear-resistant bimetallic is made Composite roll covers preset inner sleeve.
Step 2, the preparation and pretreatment of sand mold are moved：
(1) emergy, clay and suitable quantity of water, mixing is used to manufacture sand mold, sand mold will be made in the fire resisting with some strength It is convenient that it is moved on brick.Wherein, by mass percentage, emergy 75%, clay 15%, surplus are water；
The internal diameter of sand mold is the outer diameter of high-toughness wear-resistant bimetallic composite roll set, the height gold more double than high-toughness wear-resistant of sand mold Belong to composite roll set height it is high by 8%, sand mold internal diameter be 0.6m, thickness 0.3m, the bottom of sand mold will there are with high-ductility in step 1 Property abrasion-proof duplex metal composite roll cover the cylindrical pit of the identical size of preset inner sleeve outer diameter, the depth of pit is preset inner sleeve height 5%.
(2) after sand mold makes, mold cavity surface is coated with alumina setter coating, then sand mold is placed in baker and is dried, and waits for It is for use after cooling down.
Step 3, the cast of high-strength wearable housing：
(1) it the high-toughness wear-resistant bimetallic composite roll poured into a mould in step 1 is covered into preset inner sleeve is put into and prepared in step 2 In sand mold, the two is pushed into high temperature furnace and is preheated, the casting mold after being preheated；Wherein, preheating temperature is 300 DEG C, Preheating time is 8h.
(2) according to component requirements, using rich chromium cast iron, graphite, iron, ferrotungsten as raw material, dispensing is carried out to lagging material, will be matched The different materials set are cut into bulk and are mixed to get lagging material mixture；
So that the element for including of lagging material mixture and the mass percent of each element are：C：3.5%, Cr： 10%, Cu：1.5%, Si：1.0%, W：10%, surplus is Fe and inevitable impurity, the mass percent of each impurity≤ 0.5%；
(3) lagging material mixture is put into crucible, is melted in high temperature furnace, after 300min is kept the temperature, obtained outer Cover material melt is poured into the casting mold after preheating prefabricated in step 2, is cast with lagging material melt is obtained The sand mold of lagging material.
Step 4, high-toughness wear-resistant bimetallic composite roll covers the metallurgical binding of preset interior cover material and lagging material：
After cast, the sand mold for being cast with lagging material is again pushed into high temperature furnace keeps the temperature at once, temperature is 1400 DEG C, soaking time 20min.After heat preservation terminates, sand mold is cooled to the furnace room temperature, it is compound to bimetallic after cooling Roller covers and sand mold.
Step 5, the heat treatment of high-toughness wear-resistant bimetallic composite roll set
(1) high-toughness wear-resistant bimetallic composite roll set is quenched, specially：
Bimetallic composite roll after cooling set and sand mold are warming up to 900 DEG C, 1200min is kept the temperature, then answers bimetallic It closes roller set to take out from sand mold, clears up sand mold, bimetallic composite roll is covered and carries out air blast cooling to room temperature, obtains work after cooling Part.
(2) workpiece after cooling is again pushed into high temperature furnace, carries out temper, tempering process is 600 DEG C of heat preservations 60min, furnace cooling after terminating obtain high-toughness wear-resistant bimetallic composite roll set.
The high-strength wearable composite roll set prepared through above-mentioned technique, is reached between preset inner sleeve and housing by elements diffusion Good metallurgical binding, Interface Microstructure are as shown in Figure 7；Under the premise of ensureing toughness, the hardness of housing is up to 66HRC, the party The composite roll set that method is prepared can meet the use condition of high-pressure roller mill.
Embodiment 3
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve are good using toughness 20 steel.
Wherein, lagging material uses the high alloy housing that Cr, Mo strengthen, specially its chemical composition by weight percentage For：C:2.43%, Si:1.0%, Mn:0.3%, Cr:16%, Cu:1.5%, Ni:1.0%, Mo:1%, surplus is Fe and can not The impurity avoided, mass percent≤0.5% of each impurity；
The chemical composition of the preset inner sleeve of 20 steel is carbon containing 0.02wt.%, and surplus is iron and inevitable alloying element.
In high-toughness wear-resistant bimetallic composite roll set, housing wall thickness is that high-toughness wear-resistant bimetallic composite roll covers overall wall thickness 1/3.
Hardness after housing heat treatment is 63HRC, impact flexibility 4J/mm2, the shearing between preset inner sleeve and housing is strong Reach 515MPa.
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, specifically includes following steps：
Step 1, the casting of preset inner sleeve：
(1) preferable 20 steel of toughness is selected, it is pre- to carry out high-toughness wear-resistant bimetallic composite roll set according to common pouring technology The cast of inner sleeve is set, size is outer diameter 1.4m, internal diameter 0.8m, height 0.8m.
(2) it uses mechanical processing to remove the oxide skin that high-toughness wear-resistant bimetallic composite roll covers preset inner sleeve surface, uses Alcohol or acetone soln are cleaned to clean surface, and ensure the dimensional accuracy of workpiece, and high-toughness wear-resistant bimetallic is made Composite roll covers preset inner sleeve.
Step 2, the preparation and pretreatment of sand mold are moved：
(1) zircon sand, clay and suitable quantity of water, mixing is used to manufacture sand mold, sand mold will be made in the fire resisting with some strength It is convenient that it is moved on material.Wherein, by mass percentage, zircon sand 85%, clay 10%, surplus are water；
The internal diameter of sand mold is the outer diameter of high-toughness wear-resistant bimetallic composite roll set, the height gold more double than high-toughness wear-resistant of sand mold Belong to composite roll set height it is high by 5%, sand mold internal diameter be 0.6m, thickness 0.3m, the bottom of sand mold will there are with high-ductility in step 1 Property abrasion-proof duplex metal composite roll cover the cylindrical pit of the identical size of preset inner sleeve outer diameter, the depth of pit is preset inner sleeve height 3%.
(2) after sand mold makes, mold cavity surface is coated with alumina setter coating, then sand mold is placed in baker and is dried, and waits for It is for use after cooling down.
Step 3, the cast of high-strength wearable housing：
(1) it the high-toughness wear-resistant bimetallic composite roll poured into a mould in step 1 is covered into preset inner sleeve is put into and prepared in step 2 In sand mold, the two is pushed into high temperature furnace and is preheated, the casting mold after being preheated；Wherein, preheating temperature is 500 DEG C, Preheating time is 4h.
(2) according to component requirements, using rich chromium cast iron, graphite, iron, molybdenum-iron as raw material, dispensing is carried out to lagging material, will be matched The different materials set are cut into bulk and are mixed to get lagging material mixture；
So that the element for including of lagging material mixture and the mass percent of each element are：C:2.43%, Si: 1.0%, Mn:0.3%, Cr:16%, Cu:1.5%, Ni:1.0%, Mo:1%, surplus be Fe and inevitable impurity, each Mass percent≤0.5% of impurity.
(3) lagging material mixture is put into crucible, is melted in high temperature furnace, after 100min is kept the temperature, obtained outer Cover material melt is poured into the casting mold after preheating prefabricated in step 2, is cast with lagging material melt is obtained The sand mold of lagging material.
Step 4, high-toughness wear-resistant bimetallic composite roll covers the metallurgical binding of preset interior cover material and lagging material：
After cast, the sand mold for being cast with lagging material is again pushed into high temperature furnace keeps the temperature at once, temperature is 1200 DEG C, soaking time 100min.After heat preservation terminates, sand mold is cooled to the furnace room temperature, it is multiple to bimetallic after cooling Close roller set and sand mold.
Step 5, the heat treatment of high-toughness wear-resistant bimetallic composite roll set
(1) high-toughness wear-resistant bimetallic composite roll set is quenched, specially：
Bimetallic composite roll after cooling set and sand mold are warming up to 1000 DEG C, 600min is kept the temperature, then answers bimetallic It closes roller set to take out from sand mold, clears up sand mold, bimetallic composite roll is covered and carries out air blast cooling to room temperature, obtains work after cooling Part.
(2) workpiece after cooling is again pushed into high temperature furnace, carries out temper, tempering process is 400 DEG C of heat preservations 240min, furnace cooling after terminating obtain high-toughness wear-resistant bimetallic composite roll set.
The high-strength wearable composite roll set prepared through above-mentioned technique, is reached between preset inner sleeve and housing by elements diffusion Good metallurgical binding, Interface Microstructure are as shown in Figure 8；Under the premise of ensureing toughness, the hardness of housing is up to 62HRC, the party The composite roll set that method is prepared can meet the use condition of high-pressure roller mill.
Embodiment 4
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve are good using toughness 20 steel.
Wherein, the high alloy housing that lagging material is strengthened using Cr, W, specially its chemical composition are by weight percentage： C:2.43%, Si:1.0%, Mn:0.3%, Cr:16%, Mo:0.5%, Cu:1.5%, Ni:1.0%, W:15%, surplus Fe With inevitable impurity, mass percent≤0.5% of each impurity；
The chemical composition of the preset inner sleeve of 20 steel is carbon containing 0.02wt.%, and surplus is iron and inevitable alloying element.
In high-toughness wear-resistant bimetallic composite roll set, housing wall thickness is that high-toughness wear-resistant bimetallic composite roll covers overall wall thickness 1/4.
Hardness after housing heat treatment is 65HRC, impact flexibility 5.5J/mm2, the shearing between preset inner sleeve and housing Reach 535MPa by force.
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, specifically includes following steps：
Step 1, the casting of preset inner sleeve：
(1) preferable 20 steel of toughness is selected, it is pre- to carry out high-toughness wear-resistant bimetallic composite roll set according to common pouring technology The cast of inner sleeve is set, size is outer diameter 1.6m, internal diameter 1.0m, height 0.8m.
(2) it uses mechanical processing to remove the oxide skin that high-toughness wear-resistant bimetallic composite roll covers preset inner sleeve surface, uses Alcohol or acetone soln are cleaned to clean surface, and ensure the dimensional accuracy of workpiece.High-toughness wear-resistant bimetallic is made Composite roll covers preset inner sleeve.
Step 2, the preparation and pretreatment of sand mold are moved：
(1) zircon sand and emergy, clay and suitable quantity of water, mixing is used to manufacture sand mold, sand mold will be made with certain strong It is convenient that it is moved on the refractory material of degree.Wherein, by mass percentage, zircon sand 45%, emergy are 40%, clay 10%, surplus is water；
The internal diameter of sand mold is the outer diameter of high-toughness wear-resistant bimetallic composite roll set, the height gold more double than high-toughness wear-resistant of sand mold The height for belonging to composite roll set is high by 10%, and sand mold internal diameter is 0.6m, thickness 0.3m, the bottom of sand mold will there are with it is high in step 1 Tough wear-resistant hard bimetallic composite roll covers the cylindrical pit of the identical size of preset inner sleeve outer diameter, and the depth of pit is that preset inner sleeve is high The 5% of degree.
(2) after sand mold makes, mold cavity surface is coated with alumina setter coating, then sand mold is placed in baker and is dried, and waits for It is for use after cooling down.
Step 3, the cast of high-strength wearable housing：
(1) it the high-toughness wear-resistant bimetallic composite roll poured into a mould in step 1 is covered into preset inner sleeve is put into and prepared in step 2 In sand mold, the two is pushed into high temperature furnace and is preheated, the casting mold after being preheated；Wherein, preheating temperature is 600 DEG C, Preheating time is 3h.
(2) according to component requirements, using rich chromium cast iron, graphite, iron, ferrotungsten as raw material, dispensing is carried out to lagging material, will be matched Several bulks that are cut into set are mixed to get lagging material mixture；
So that the element for including of lagging material mixture and the mass percent of each element are：C:2.43%, Si: 1.0%, Mn:0.3%, Cr:16%, Mo:0.5%, Cu:1.5%, Ni:1.0%, W:15%, surplus is for Fe and inevitably Impurity, mass percent≤0.5% of each impurity.
(3) lagging material mixture is put into crucible, is melted in high temperature furnace, after 60min is kept the temperature, obtain housing Material melt is poured into lagging material melt is obtained in the casting mold after preheating prefabricated in step 2, obtains being cast with outer The sand mold of cover material.
Step 4, high-toughness wear-resistant bimetallic composite roll covers the metallurgical binding of preset interior cover material and lagging material：
After cast, the sand mold for being cast with lagging material is again pushed into high temperature furnace keeps the temperature at once, temperature is 1300 DEG C, soaking time 120min.After heat preservation terminates, sand mold is cooled to the furnace room temperature, it is multiple to bimetallic after cooling Close roller set and sand mold.
Step 5, the heat treatment of high-toughness wear-resistant bimetallic composite roll set
(1) bimetallic composite roll after cooling set and sand mold are warming up to 950 DEG C, 800min are kept the temperature, then by bimetallic Composite roll set and sand mold taking-up, clear up sand mold, are covered to bimetallic composite roll and carry out air blast cooling to room temperature, obtain work after cooling Part.
(2) workpiece after cooling is again pushed into high temperature furnace, carries out temper, tempering process is 500 DEG C of heat preservations 600min, furnace cooling after terminating obtain high-toughness wear-resistant bimetallic composite roll set.
The high-strength wearable composite roll set prepared through above-mentioned technique, is reached between preset inner sleeve and housing by elements diffusion Good metallurgical binding, Interface Microstructure are as shown in Figure 9；Under the premise of ensureing toughness, the hardness of housing is up to 66HRC, the party The composite roll set that method is prepared can meet the use condition of high-pressure roller mill.
Embodiment 5
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve are good using toughness 40Cr steel.
Wherein, the high alloy housing that lagging material is strengthened using Cr, V, specially its chemical composition are by weight percentage： C:2.43%, Si:1.0%, Mn:0.3%, Cr:16%, Mo:0.5%, Cu:1.5%, Ni:1.0%, V:4%, surplus Fe With inevitable impurity, mass percent≤0.5% of each impurity；
The chemical composition of the preset inner sleeve of 40Cr steel is carbon containing 0.04wt.%, and surplus is iron and inevitable alloying element.
In high-toughness wear-resistant bimetallic composite roll set, housing wall thickness is that high-toughness wear-resistant bimetallic composite roll covers overall wall thickness 1/2.
Hardness after housing heat treatment is 65HRC, impact flexibility 6J/mm2, the shearing between preset inner sleeve and housing is strong Reach 550MPa.
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, specifically includes following steps：
Step 1, the casting of preset inner sleeve：
(1) the preferable 40Cr steel of toughness is selected, high-toughness wear-resistant bimetallic composite roll set is carried out according to common pouring technology The cast of preset inner sleeve, size are outer diameter 1.4m, internal diameter 1.0m, height 0.8m.
(2) it uses mechanical processing to remove the oxide skin that high-toughness wear-resistant bimetallic composite roll covers preset inner sleeve surface, uses Alcohol or acetone soln are cleaned to clean surface, and ensure the dimensional accuracy of workpiece.High-toughness wear-resistant bimetallic is made Composite roll covers preset inner sleeve.
Step 2, the preparation and pretreatment of sand mold are moved：
(1) emergy, clay and suitable quantity of water is used to manufacture sand mold, sand mold to make the refractory material with some strength it On, it is convenient that it is moved.Wherein, by mass percentage, emergy 80%, clay 12%, surplus are water；
The internal diameter of sand mold is the outer diameter of high-toughness wear-resistant bimetallic composite roll set, the height gold more double than high-toughness wear-resistant of sand mold The height for belonging to composite roll set is high by 15%, and sand mold internal diameter is 0.6m, thickness 0.3m, the bottom of sand mold will there are with it is high in step 1 Tough wear-resistant hard bimetallic composite roll covers the cylindrical pit of the identical size of preset inner sleeve outer diameter, and the depth of pit is in preset Cover the 8% of height.
(2) after sand mold makes, mold cavity surface is coated with alumina setter coating, then sand mold is placed in baker and is dried, and waits for It is for use after cooling down.
Step 3, the cast of high-strength wearable housing：
(1) it the high-toughness wear-resistant bimetallic composite roll poured into a mould in step 1 is covered into preset inner sleeve is put into and prepared in step 2 In sand mold, the two is pushed into high temperature furnace and is preheated, the casting mold after being preheated；Wherein, preheating temperature is 400 DEG C, Preheating time is 4h.
(2) according to component requirements, using rich chromium cast iron, graphite, iron, vanadium iron as raw material, dispensing is carried out to lagging material, will be matched Several bulks that are cut into set are mixed to get lagging material mixture；
So that the element for including of lagging material mixture and the mass percent of each element are：C:2.43%, Si: 1.0%, Mn:0.3%, Cr:16%, Mo:0.5%, Cu:1.5%, Ni:1.0%, V:4%, surplus is for Fe and inevitably Impurity, mass percent≤0.5% of each impurity.
(3) lagging material mixture is put into crucible, is melted in high temperature furnace, after 200min is kept the temperature, obtained outer Cover material melt is poured into the casting mold after preheating prefabricated in step 2, is cast with lagging material melt is obtained The sand mold of lagging material.
Step 4, high-toughness wear-resistant bimetallic composite roll covers preset interior cover material and lagging material metallurgical binding：
After cast, the sand mold for being cast with lagging material is again pushed into high temperature furnace keeps the temperature at once, temperature 900 DEG C, soaking time 60min.After heat preservation terminates, sand mold is cooled to the furnace room temperature, arrive bimetallic composite roll set after cooling And sand mold.
Step 5, the heat treatment of high-toughness wear-resistant bimetallic composite roll set
(1) high-toughness wear-resistant bimetallic composite roll set is quenched, specially：
Bimetallic composite roll after cooling set and sand mold are warming up to 1050 DEG C, 1000min is kept the temperature, then answers bimetallic It closes roller set to take out from sand mold, clears up sand mold, bimetallic composite roll is covered and carries out air blast cooling to room temperature, obtains work after cooling Part.
(2) workpiece after cooling is again pushed into high temperature furnace, carries out temper, tempering process is 400 DEG C of heat preservations 700min, furnace cooling after terminating obtain high-toughness wear-resistant bimetallic composite roll set.
The high-strength wearable composite roll set prepared through above-mentioned technique, is reached between preset inner sleeve and housing by elements diffusion Good metallurgical binding；Under the premise of ensureing toughness, the hardness of housing is up to 65HRC, the composite roll set that this method is prepared The use condition of high-pressure roller mill can be met.
Embodiment 6
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve are good using toughness 20Cr steel.
Wherein, the high alloy housing that lagging material is strengthened using Cr, W, specially its chemical composition are by weight percentage： C：2.0%, Cr：43%, Cu：1.5%, Si：2.0%, W：20%, surplus be Fe and inevitable impurity, each impurity Mass percent≤0.5%；
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, with embodiment 1, the difference is that, it is preset interior Set is different with the used material of housing.
Embodiment 7
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve are good using toughness 40CrMo steel.
Wherein, lagging material uses the high alloy housing that Cr, Ti, Mn strengthen, specially its chemical composition percentage by weight Than for：C：2.6%, Cr：20%, Mn：10%, Ti：20%, Nb：5%, surplus is Fe and inevitable impurity, each impurity Mass percent≤0.5%；
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, with embodiment 1, the difference is that, it is preset interior Set is different with the used material of housing.
Embodiment 8
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve are good using toughness 42CrMoV steel.
Wherein, the high alloy housing that lagging material is strengthened using Cr, V, specially its chemical composition are by weight percentage： C：3.5%, Cr：10%, Cu：1.5%, Si：1.0%, V：20%, surplus be Fe and inevitable impurity, each impurity Mass percent≤0.5%；
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, with embodiment 1, the difference is that, it is preset interior Set is different with the used material of housing.
Embodiment 9
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve are good using toughness 45 steel.
Wherein, lagging material uses the high alloy housing that Cr, Mo strengthen, specially its chemical composition by weight percentage For：C：2.2%, Cr：32%, Cu：1.0%, Si：1.0%, Mo：20%, surplus is Fe and inevitable impurity, each is miscellaneous Mass percent≤0.5% of matter；
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, with embodiment 1, the difference is that, it is preset interior Set is different with the used material of housing.
Embodiment 10
A kind of high-toughness wear-resistant bimetallic composite roll set, including preset inner sleeve and housing, preset inner sleeve are good using toughness Q235.
Wherein, lagging material uses the high alloy housing that Cr, V, Mo strengthen, specially its chemical composition by weight percentage For：C：1.5%, Cr：25%, V：10%, Mo：10%, Ti:5%, surplus be Fe and inevitable impurity, each impurity Mass percent≤0.5%；
A kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, with embodiment 1, the difference is that, it is preset interior Set is different with the used material of housing.

Claims (10)

1. a kind of high-toughness wear-resistant bimetallic composite roll set, which is characterized in that the high-toughness wear-resistant bimetallic composite roll set includes The material of preset inner sleeve and housing, the preset inner sleeve is common middle low carbon steel or low-alloy steel, and the material of housing includes Element and the mass percent of each element be：C：1.0~3.5%, Si：0~2.0%, Cr：10~43%, Cu：0~ 1.5%, Mn：0~10%, Ni：0~1.0%, W：0~20%, V：0~20%, Mo：0~20%, Ti:0~20%, Nb：0~ 5%, surplus is Fe and inevitable impurity, and mass percent≤0.5% of each impurity, housing wall thickness is high-toughness wear-resistant Bimetallic composite roll covers the 1/4~1/2 of overall wall thickness.
2. high-toughness wear-resistant bimetallic composite roll set as described in claim 1, which is characterized in that the high-toughness wear-resistant of preparation is double Metal composite roller set, case hardness are 63~65HRC, and impact flexibility is 5~10J/mm2, cutting between preset inner sleeve and housing Shearing stress is 515~600MPa.
3. high-toughness wear-resistant bimetallic composite roll set as described in claim 1, which is characterized in that the high-toughness wear-resistant of preparation is double Metal composite roller set is particularly suitable in high-pressure roller mill.
4. the preparation method of the high-toughness wear-resistant bimetallic composite roll set described in claims 1 to 3 any one, feature exist In specifically including following steps：
Step 1, the casting of preset inner sleeve：
(1) common middle low carbon steel or low-alloy steel are selected, is poured into a mould according to common pouring technology, the high-ductility of size requirement is obtained Property abrasion-proof duplex metal composite roll cover preset inner sleeve；
(2) surface that preset inner sleeve is covered to high-toughness wear-resistant bimetallic composite roll is surface-treated, and obtains the accurate surface of size Smooth high-toughness wear-resistant bimetallic composite roll covers preset inner sleeve；
Step 2, the preparation and pretreatment of sand mold are moved：
(1) sand mold raw material is weighed according to the ratio, using fire resisting material apparatus, manufactures concave structure sand mold, the size of sand mold is prefabricated The matching size of standby high-toughness wear-resistant bimetallic composite roll set closes, specifically, the internal diameter of sand mold is high-toughness wear-resistant bimetallic The outer diameter of composite roll set, the height of sand mold is higher by 5~15% than the height that high-toughness wear-resistant bimetallic composite roll covers, meanwhile, sand mold Bottom setting the cylindrical pit of the identical size of preset inner sleeve outer diameter, the depth of pit are covered with high-toughness wear-resistant bimetallic composite roll Degree is the 3~8% of preset inner sleeve height；
(2) it by the sand mold cavity inner surface coating refractory material of preparation, is placed in baker and dries, it is cooling for use；
Step 3, the cast of high-strength wearable housing：
(1) the high-toughness wear-resistant bimetallic composite roll prepared in step 1 is covered into preset inner sleeve and is put into the sand mold prepared in step 2 Cylindrical pit in, will the two be pushed into high temperature furnace in preheat, the casting mold after being preheated；Wherein, preheating temperature It it is 300 DEG C~700 DEG C, preheating time is 2~8h；
(2) according to requirements, composition design is carried out to lagging material, according to component requirements, chooses lagging material, and by housing The raw material of material is mixed, and lagging material mixture is obtained；
Wherein, according to requirements, the element for including of lagging material mixture and the mass percent of each element are：C： 1.0~3.5%, Cr：10~43%, Cu：0~1.5%, Mn：0~10%, Ni：0~1.0%, W：0~20%, V：0~ 20%, Mo：0~20%, Ti：0~20%, Nb：0~5%, Si：0~2%, surplus is Fe and inevitable impurity；
(3) lagging material mixture is put into crucible, is melted in high temperature furnace, after melting and heat preservation, obtain lagging material melt, By in the casting mold of lagging material melt cast after preheat, the sand mold for being cast with lagging material is obtained；Wherein, fusion temperature More than the melting temperature for lagging material mixture, the melting and heat preservation time is 10~300min；
Step 4, high-toughness wear-resistant bimetallic composite roll covers the metallurgical binding of preset interior cover material and lagging material：
The sand mold for being cast with lagging material is again pushed into high temperature furnace at once and is kept the temperature, after heat preservation, cools to room temperature with the furnace, Obtain bimetallic composite roll set and sand mold after cooling；Wherein, holding temperature be 900~1400 DEG C, soaking time be 20~ 300min；
Step 5, the heat treatment of high-toughness wear-resistant bimetallic composite roll set
(1) high-toughness wear-resistant bimetallic composite roll set is quenched, specially：
Bimetallic composite roll after cooling set and sand mold are warming up to 900~1100 DEG C, keep the temperature 120~1200min, it then will be double Metal composite roller set takes out from sand mold, after attachment sand mold cleaning on bimetallic composite roll set surface, to bimetallic composite roll set Air blast cooling is carried out to room temperature, obtains workpiece after cooling；
(2) workpiece after cooling is again pushed into high temperature furnace, after carrying out temper, cools to room temperature with the furnace, obtain high-ductility Property abrasion-proof duplex metal composite roll set；Wherein, temperature is 300~600 DEG C, keeps the temperature 60~1200min.
5. the preparation method of high-toughness wear-resistant bimetallic composite roll set as claimed in claim 4, which is characterized in that the step In rapid 1 (1), the common middle low carbon steel or low-alloy steel, toughness are 20~80J/mm2, specially Q235,20 steel, One kind in 20Cr steel, 40Cr steel, 40CrMo steel, 42CrMoV steel, 40 steel or 45 steel.
6. the preparation method of high-toughness wear-resistant bimetallic composite roll set as claimed in claim 4, which is characterized in that the step In rapid 1 (2), the surface treatment, specially：It is pre- using machining process removal high-toughness wear-resistant bimetallic composite roll set The surface scale for setting inner sleeve is cleaned to clean surface with alcohol, acetone or gasoline solution, and ensures high-toughness wear-resistant Bimetallic composite roll covers the dimensional accuracy of preset inner sleeve workpiece.
7. the preparation method of high-toughness wear-resistant bimetallic composite roll set as claimed in claim 4, which is characterized in that the step In rapid 2 (1), the sand mold raw material includes for molding sand, clay and water, wherein and by mass percentage, molding sand is 75~85%, Clay is 10~15%, and surplus is water；The molding sand mixes for one or both of zircon sand or emergy.
8. the preparation method of high-toughness wear-resistant bimetallic composite roll set as claimed in claim 4, which is characterized in that the step In rapid 2 (1), the fire resisting material apparatus is refractory brick；In the step 2 (2), selected fireproof coating is aluminium oxide Powder.
9. the preparation method of high-toughness wear-resistant bimetallic composite roll set as claimed in claim 4, which is characterized in that the step In rapid 2 (2), the drying is 300~700 DEG C of dry 2~8h, described to be cooled to furnace cooling or naturally cool to room Temperature.
10. the preparation method of high-toughness wear-resistant bimetallic composite roll set as claimed in claim 4, which is characterized in that described In step 3 (2), the raw material of the lagging material include rich chromium cast iron, graphite powder, silica flour, iron, ferro-molybdenum, ferro-tungsten, One or more of vanadium iron, ferromanganese powder, ferro-niobium powder, titanium-iron powder alloy mix.
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CN109234610A (en) * 2018-10-25 2019-01-18 湖南山力泰机电科技有限公司 A kind of high hardness alloy material based on the application of high chromium niobium
CN109487177A (en) * 2018-11-23 2019-03-19 江苏华洋电力机械制造有限公司 Straightening plate with high-strength wear-resistant alloy steel
CN111139394A (en) * 2019-12-24 2020-05-12 中钢集团邢台机械轧辊有限公司 Preparation method of high-performance rough rolling working roll
CN111750193A (en) * 2020-06-16 2020-10-09 新泰市鼎鑫工贸有限公司 Yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron elbow tee joint and preparation method thereof
CN111748723A (en) * 2020-06-16 2020-10-09 新泰市鼎鑫工贸有限公司 Formula of yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron
CN111893373A (en) * 2020-07-15 2020-11-06 中国兵器科学研究院宁波分院 High-hardness wear-resistant cast iron and preparation method thereof
CN112899555A (en) * 2021-01-20 2021-06-04 益阳金能新材料有限责任公司 High-chromium cast iron wear-resistant material and preparation method thereof
CN114850452A (en) * 2021-02-03 2022-08-05 中国石油天然气集团有限公司 Method for manufacturing wear-resistant workpiece
CN115212994A (en) * 2022-06-12 2022-10-21 华能国际电力股份有限公司营口电厂 High-wear-resistance metal ceramic composite roller sleeve and preparation method thereof

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CN103160755A (en) * 2013-04-15 2013-06-19 平勇 Straightening roller for straightening round steel bar material
CN103252268A (en) * 2013-05-15 2013-08-21 王文祥 Super wear-resisting centrifuging composite casting tyre-shaped grinding roller and manufacturing method thereof
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CN109234610A (en) * 2018-10-25 2019-01-18 湖南山力泰机电科技有限公司 A kind of high hardness alloy material based on the application of high chromium niobium
CN109487177A (en) * 2018-11-23 2019-03-19 江苏华洋电力机械制造有限公司 Straightening plate with high-strength wear-resistant alloy steel
CN111139394A (en) * 2019-12-24 2020-05-12 中钢集团邢台机械轧辊有限公司 Preparation method of high-performance rough rolling working roll
CN111139394B (en) * 2019-12-24 2022-01-11 中钢集团邢台机械轧辊有限公司 Preparation method of high-performance rough rolling working roll
CN111750193A (en) * 2020-06-16 2020-10-09 新泰市鼎鑫工贸有限公司 Yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron elbow tee joint and preparation method thereof
CN111748723A (en) * 2020-06-16 2020-10-09 新泰市鼎鑫工贸有限公司 Formula of yttrium series heavy rare earth high-toughness wear-resistant high-chromium cast iron
CN111893373A (en) * 2020-07-15 2020-11-06 中国兵器科学研究院宁波分院 High-hardness wear-resistant cast iron and preparation method thereof
CN112899555A (en) * 2021-01-20 2021-06-04 益阳金能新材料有限责任公司 High-chromium cast iron wear-resistant material and preparation method thereof
CN114850452A (en) * 2021-02-03 2022-08-05 中国石油天然气集团有限公司 Method for manufacturing wear-resistant workpiece
CN115212994A (en) * 2022-06-12 2022-10-21 华能国际电力股份有限公司营口电厂 High-wear-resistance metal ceramic composite roller sleeve and preparation method thereof

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