CN108277436B - 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 PDFInfo
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- CN108277436B CN108277436B CN201810259714.2A CN201810259714A CN108277436B CN 108277436 B CN108277436 B CN 108277436B CN 201810259714 A CN201810259714 A CN 201810259714A CN 108277436 B CN108277436 B CN 108277436B
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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
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- 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
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- 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
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- 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
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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
- C22C38/18—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
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 bonding, 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 are as follows: the casting of preset inner sleeve；The preparation and pretreatment of removable sand mold；The casting of high-strength wearable housing；High-toughness wear-resistant bimetallic composite roll covers the metallurgical bonding 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 bonding.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, further increase high-toughness wear-resistant bimetallic composite roll set comprehensive mechanical property.
Description
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 preparation
Method.
Background technique
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, it is easy to produce crackle between substrate, causes
Roll surface material falls back, reduces the service life；Bimetal centrifugal casting roll surface is easy to produce the tissue defects such as hole, cracking, and
It needs to be easy to produce danger using large scale equipment；And carbide mosaic roll surface, although can be effective against material to roller
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 material resources 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.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of high-toughness wear-resistant bimetallic composite roll set and preparation method.
It is preset inner sleeve, using high alloy material as the bimetallic composite roll of high-wearing feature housing with common middle low carbon steel or low-alloy steel
Set.The technology of preparation method low production cost, simple process, gained composite roll set in two kinds of materials be well combined, 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 inclusions, gap for compound interface, or outer
Complete metallurgical bonding 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, thus 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, in common middle low-carbon
The surface of steel or low-alloy steel, by way of casting, while guaranteeing high tenacity, preparing one layer has high-intensitive, height
The material of wearability.And by subsequent heat treatment appropriate, strengthen material further.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 bonding.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 covering high-toughness wear-resistant bimetallic composite roll
It can be further improved.
A kind of high-toughness wear-resistant bimetallic composite roll set of the 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 of element and each element that the material of housing includes
Are as follows: 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 bonding, 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, surface 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 preparation of the 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 invention, specifically includes the following steps:
Step 1, the casting of preset inner sleeve:
(1) common middle low carbon steel or low-alloy steel are selected, is poured according to common pouring technology, size requirement is obtained
High-toughness wear-resistant bimetallic composite roll covers preset inner sleeve；
(2) surface for covering preset inner sleeve 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 size of pre-prepared high-toughness wear-resistant bimetallic composite roll set matches, 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 setting of sand mold covers the cylindrical pit of the identical size of preset inner sleeve outer diameter, pit with high-toughness wear-resistant bimetallic composite roll
Depth be preset inner sleeve height 3~8%；
(2) it by the sand mold type inner cavity surface coating refractory material of preparation, is placed in baker and dries, it is cooling stand-by；
Step 3, the casting of high-strength wearable housing:
(1) it the high-toughness wear-resistant bimetallic composite roll for preparing 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, ingredient 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 mass percent of the element for including of lagging material mixture and each element are as follows:
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 are 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 in 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 bonding 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, specifically:
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 tempering, cools to room temperature with the furnace, obtain
High-toughness wear-resistant bimetallic composite roll set；Wherein, tempering 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 of Q235,20 steel, 20Cr steel, 40Cr steel, 40CrMo steel, 42CrMoV steel, 40 steel or 45 steel.
In the step 1 (2), the surface treatment, specifically: high-toughness wear-resistant is removed using machining process
Bimetallic composite roll covers the surface scale of preset inner sleeve, is cleaned to clean surface with alcohol, acetone or gasoline solution,
And guarantee 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 one of zircon sand or 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, silicon powder, iron, molybdenum-iron
The mixing of one or more of alloy, ferro-tungsten, vanadium iron, ferromanganese powder, ferro-niobium powder, titanium-iron powder alloy.
In the step 3 (2), the raw material of the lagging material is mixed, specially by the raw material of lagging material
It is cut into block mixing.
High-toughness wear-resistant bimetallic composite roll set of the invention and preparation method, basic principle are as follows:
Wherein, in step 1, through over mechanical processing and the preset interior cover material after cleaning, fresh machining table is obtained
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 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, the thickness of housing only accounts for a quarter of general thickness to half, and is heat-treated and connects with insulating process
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 bonding, the two it
Between there is very high shear strength, faying face does not observe microdefect under microscope without cracking.
(5) preparation method of the invention, can produce with the good common iron of toughness is preset inner sleeve, a variety of high chromium castings
Iron-based material is housing, can obtain the good roller set of comprehensive performance, there are larger technical advantages compared with other production methods.
(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 the hardness of material, wearability
Apparent increase extends the service life of lagging material.
(7) preparation method of the invention is guaranteeing to obtain high-intensitive, 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 brought by quenching, it is multiple to being promoted
The bond strength for closing roller set plays a positive role.
Detailed description of the invention
Preset inner sleeve structural schematic diagram after being poured 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 casting schematic diagram of housing in Fig. 3, the embodiment of the present invention 1；
Fig. 4, high-toughness wear-resistant bimetallic composite roll prepared by the present invention cover schematic diagram；
Composite roll prepared by Fig. 5, the embodiment of the present invention 1 covers the scanning electron microscopic picture of preset inner sleeve Yu 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 Yu 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 Yu 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 Yu housing interface；
In attached drawing, 1 is preset inner sleeve, and 2 be sand mold, and 3 be pit, and 4 be housing.
Specific embodiment
Below 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 of Cr, V reinforcing, specially its chemical component by weight percentage
Are as follows: C:1.0%, Si:1.0%, Cr:10%, Mo:4%, surplus are Fe and inevitable impurity, the quality hundred of every kind of impurity
Divide ratio≤0.5%；
The chemical component of the preset inner sleeve 1 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, 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 the 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 casting for setting inner sleeve, having a size of outer diameter 1.4m, internal diameter 1.0m, height 0.6m.
(2) it uses machining 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 guarantee 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 are used, mixing manufactures sand mold 2, and 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 of sand mold gold more double than high-toughness wear-resistant
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, to
It is stand-by after cooling down.
Step 3, the casting of high-strength wearable housing:
(1) it the high-toughness wear-resistant bimetallic composite roll that is poured 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, ingredient 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 as follows: C:1.0%, Si:
1.0%, Cr:10%, Mo:4%, surplus are Fe and inevitable impurity, mass percent≤0.5% of every kind of 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 in the casting mold after pouring into preheating prefabricated in step 2, obtains being cast with outer lagging material melt is obtained
The sand mold of cover material, wherein housing casting schematic diagram is shown in Fig. 3.
Step 4, high-toughness wear-resistant bimetallic composite roll covers the metallurgical bonding of preset interior cover material and lagging material:
After casting, 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 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, specifically:
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 tempering, 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 bonding, Interface Microstructure are as shown in Figure 5；Under the premise of guaranteeing 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, lagging material uses the high alloy housing of Cr, W reinforcing, specially its chemical component by weight percentage are as follows:
C:3.5%, Cr:10%, Cu:1.5%, Si:1.0%, W:10%, surplus are Fe and inevitable impurity, every kind of impurity
Mass percent≤0.5%；
The chemical component 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 the 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 casting for setting inner sleeve, having a size of outer diameter 1.6m, internal diameter 1.0m, height 0.8m.
(2) it uses machining 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 guarantee 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 are used, mixing manufactures sand mold, and 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 of sand mold gold more double than high-toughness wear-resistant
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, to
It is stand-by after cooling down.
Step 3, the casting of high-strength wearable housing:
(1) it the high-toughness wear-resistant bimetallic composite roll that is poured 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, ingredient 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 as follows: C:3.5%, Cr:
10%, Cu:1.5%, Si:1.0%, W:10%, surplus are Fe and inevitable impurity, the mass percent of every kind of 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 in the casting mold after pouring into 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 bonding of preset interior cover material and lagging material:
After casting, 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 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, specifically:
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 tempering, 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 bonding, Interface Microstructure are as shown in Figure 7；Under the premise of guaranteeing 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 of Cr, Mo reinforcing, specially its chemical component by weight percentage
Are as follows: C:2.43%, Si:1.0%, Mn:0.3%, Cr:16%, Cu:1.5%, Ni:1.0%, Mo:1%, surplus are Fe and can not
The impurity avoided, mass percent≤0.5% of every kind of impurity；
The chemical component 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 the 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 casting for setting inner sleeve, having a size of outer diameter 1.4m, internal diameter 0.8m, height 0.8m.
(2) it uses machining 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 guarantee 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 are used, mixing manufactures sand mold, and 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 of sand mold gold more double than high-toughness wear-resistant
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, to
It is stand-by after cooling down.
Step 3, the casting of high-strength wearable housing:
(1) it the high-toughness wear-resistant bimetallic composite roll that is poured 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, ingredient 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 as follows: 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, every kind
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 in the casting mold after pouring into 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 bonding of preset interior cover material and lagging material:
After casting, 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, specifically:
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 tempering, 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 bonding, Interface Microstructure are as shown in Figure 8；Under the premise of guaranteeing 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, lagging material uses the high alloy housing of Cr, W reinforcing, specially its chemical component by weight percentage are as follows:
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 every kind of impurity；
The chemical component 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, 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 the 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 casting for setting inner sleeve, having a size of outer diameter 1.6m, internal diameter 1.0m, height 0.8m.
(2) it uses machining 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 guarantee 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 are used, mixing manufactures sand mold, and 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 of sand mold gold more double than high-toughness wear-resistant
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, to
It is stand-by after cooling down.
Step 3, the casting of high-strength wearable housing:
(1) it the high-toughness wear-resistant bimetallic composite roll that is poured 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, ingredient 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 as follows: 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 every kind of 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 in the casting mold after pouring into preheating prefabricated in step 2, obtains being cast with outer lagging material melt is obtained
The sand mold of cover material.
Step 4, high-toughness wear-resistant bimetallic composite roll covers the metallurgical bonding of preset interior cover material and lagging material:
After casting, 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, cover 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 tempering, 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 bonding, Interface Microstructure are as shown in Figure 9；Under the premise of guaranteeing 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, lagging material uses the high alloy housing of Cr, V reinforcing, specially its chemical component by weight percentage are as follows:
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 every kind of impurity；
The chemical component 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 the following steps:
Step 1, the casting of preset inner sleeve:
(1) the preferable 40Cr steel of toughness is selected, carries out high-toughness wear-resistant bimetallic composite roll set according to common pouring technology
The casting of preset inner sleeve, having a size of outer diameter 1.4m, internal diameter 1.0m, height 0.8m.
(2) it uses machining 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 guarantee 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) sand mold is manufactured using emergy, clay and suitable quantity of water, 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 of sand mold gold more double than high-toughness wear-resistant
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, to
It is stand-by after cooling down.
Step 3, the casting of high-strength wearable housing:
(1) it the high-toughness wear-resistant bimetallic composite roll that is poured 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, ingredient 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 as follows: 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 every kind of 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 in the casting mold after pouring into 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 bonding:
After casting, 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, specifically:
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 tempering, 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 bonding；Under the premise of guaranteeing 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, lagging material uses the high alloy housing of Cr, W reinforcing, specially its chemical component by weight percentage are as follows:
C:2.0%, Cr:43%, Cu:1.5%, Si:2.0%, W:20%, surplus are Fe and inevitable impurity, every kind of 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
It covers 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, the high alloy housing that lagging material uses Cr, Ti, Mn to strengthen, specially its chemical component percentage by weight
Than are as follows: C:2.6%, Cr:20%, Mn:10%, Ti:20%, Nb:5%, surplus are Fe and inevitable impurity, every kind of 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
It covers 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, lagging material uses the high alloy housing of Cr, V reinforcing, specially its chemical component by weight percentage are as follows:
C:3.5%, Cr:10%, Cu:1.5%, Si:1.0%, V:20%, surplus are Fe and inevitable impurity, every kind of 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
It covers 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 of Cr, Mo reinforcing, specially its chemical component by weight percentage
Are as follows: C:2.2%, Cr:32%, Cu:1.0%, Si:1.0%, Mo:20%, surplus are Fe and inevitable impurity, and every kind 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
It covers 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 of Cr, V, Mo reinforcing, specially its chemical component by weight percentage
Are as follows: C:1.5%, Cr:25%, V:10%, Mo:10%, Ti:5%, surplus are Fe and inevitable impurity, every kind of 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
It covers different with the used material of housing.
Claims (10)
1. a kind of preparation method of high-toughness wear-resistant bimetallic composite roll set, the high-toughness wear-resistant bimetallic composite roll cover packet
Preset inner sleeve and housing are included, the material of the preset inner sleeve is common middle low carbon steel or low-alloy steel, which is characterized in that high
The preparation method of tough wear-resistant hard bimetallic composite roll set, specifically includes the following steps:
Step 1, the casting of preset inner sleeve:
(1) common middle low carbon steel or low-alloy steel are selected, is poured 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 for covering preset inner sleeve 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 size of standby high-toughness wear-resistant bimetallic composite roll set matches, 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 covers the cylindrical pit of the identical size of preset inner sleeve outer diameter, the depth of pit with high-toughness wear-resistant bimetallic composite roll
It is the 3 ~ 8% of preset inner sleeve height；
(2) it by the sand mold type inner cavity surface coating refractory material of preparation, is placed in baker and dries, it is cooling stand-by；
Step 3, the casting 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 is 300 DEG C ~ 700 DEG C, preheating time is 2 ~ 8h；
(2) according to requirements, ingredient 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 mass percent of the element for including of lagging material mixture and each element are as follows: 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 are Fe and inevitable impurity；Mass percent≤0.5% of every kind of impurity, housing
Wall thickness is that high-toughness wear-resistant bimetallic composite roll covers the 1/4 ~ 1/2 of overall wall thickness；
(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 bonding 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, specifically:
Bimetallic composite roll after cooling set and sand mold are warming up to 900 ~ 1100 DEG C, 120 ~ 1200min is kept the temperature, then by double gold
Belong to composite roll set to take out from sand mold, after attachment sand mold cleaning on bimetallic composite roll set surface, bimetallic composite roll is packed into
Row air blast cooling obtains workpiece after cooling to room temperature；
(2) workpiece after cooling is again pushed into high temperature furnace, after carrying out tempering, cools to room temperature with the furnace, obtain high-ductility
Property abrasion-proof duplex metal composite roll set；Wherein, tempering temperature is 300 ~ 600 DEG C, keeps the temperature 60 ~ 1200min.
2. the preparation method of high-toughness wear-resistant bimetallic composite roll set as described in claim 1, which is characterized in that the step
In rapid 1 (1), the common middle low carbon steel or low-alloy steel, toughness are 20 ~ 80 J/mm2, specially Q235,20 steel,
One of 20Cr steel, 40Cr steel, 40CrMo steel, 42CrMoV steel, 40 steel or 45 steel.
3. the preparation method of high-toughness wear-resistant bimetallic composite roll set as described in claim 1, which is characterized in that the step
In rapid 1 (2), the surface treatment, specifically: 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 guarantees high-toughness wear-resistant
Bimetallic composite roll covers the dimensional accuracy of preset inner sleeve workpiece.
4. the preparation method of high-toughness wear-resistant bimetallic composite roll set as described in claim 1, which is characterized in that the step
In rapid 2 (1), the sand mold raw material includes for molding sand, clay and water, wherein by mass percentage, molding sand is 75 ~ 85%, is glued
Soil is 10 ~ 15%, and surplus is water；The molding sand is the mixing of one or both of zircon sand or emergy.
5. the preparation method of high-toughness wear-resistant bimetallic composite roll set as described in claim 1, 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.
6. the preparation method of high-toughness wear-resistant bimetallic composite roll set as described in claim 1, which is characterized in that the step
In rapid 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.
7. the preparation method of high-toughness wear-resistant bimetallic composite roll set as described in claim 1, which is characterized in that the step
In rapid 3 (2), the raw material of the lagging material includes rich chromium cast iron, graphite powder, silicon powder, iron, ferro-molybdenum, ferro-tungsten, vanadium
The mixing of one or more of iron, ferromanganese powder, ferro-niobium powder, titanium-iron powder alloy.
8. a kind of high-toughness wear-resistant bimetallic composite roll set, which is characterized in that use preparation method system described in claim 1
?.
9. high-toughness wear-resistant bimetallic composite roll set as claimed in claim 8, which is characterized in that the high-toughness wear-resistant of preparation is double
Metal composite roller set, surface hardness are 63 ~ 65HRC, and impact flexibility is 5 ~ 10J/mm2, shearing between preset inner sleeve and housing
Intensity is 515 ~ 600MPa.
10. high-toughness wear-resistant bimetallic composite roll set as claimed in claim 8, which is characterized in that the high-toughness wear-resistant of preparation
Bimetallic composite roll is covered suitable for high-pressure roller mill.
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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 |
| 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 |
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| CN103008050B (en) * | 2012-10-23 | 2013-10-09 | 河北磨倒山粉磨设备有限公司 | Surfacing-free centrifugal combined ultra-high anti-abrasion roll squeezer roller sleeve and manufacturing method thereof |
| CN103160755B (en) * | 2013-04-15 | 2016-04-06 | 平勇 | A kind of straightening roll for aligning round steel bar |
| CN103252268B (en) * | 2013-05-15 | 2015-04-29 | 河北泰铭投资集团有限公司 | Super wear-resisting centrifuging composite casting tyre-shaped grinding roller and manufacturing method thereof |
| CN105127205B (en) * | 2015-08-31 | 2017-08-29 | 娄底市巨能高新耐磨材料有限公司 | Large-scale bushing roll for producing strip and preparation method thereof |
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