CN104399930B - A kind of method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill - Google Patents
A kind of method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill Download PDFInfo
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- CN104399930B CN104399930B CN201410610902.7A CN201410610902A CN104399930B CN 104399930 B CN104399930 B CN 104399930B CN 201410610902 A CN201410610902 A CN 201410610902A CN 104399930 B CN104399930 B CN 104399930B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/04—Casting by dipping
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Abstract
A kind of method that the present invention relates to centrifugal casting ceramet cellular composite material grinding roller of vertical mill, belongs to metal-base composites technical field.First ceramic particle, pore creating material and binding agent are inserted mould prepare with the ceramic particle precast body inlaying post, inlaid hole and sand mold contact surface and being provided with boss；The post of inlaying of ceramic particle precast body two-by-two every in some ceramic particle precast bodies is embedded in inlaid hole splicing, and the ceramic particle precast body then splicing completed is fixed in loose piece permanent mo(u)ld；It is fixed in centrifugal casting apparatus after loose piece permanent mo(u)ld entirety is preheated, high-temperature liquid metal of casting, after carrying out heat treatment, prepares ceramet cellular composite material grinding roller of vertical mill.The method utilizes multiple fritter honeycomb porous ceramic preforms to be spliced into integral prefabricated body, defective fritter can be replaced, it is to avoid in integral prefabricated production procedure, local defect causes the non-serviceable shortcoming of whole precast body, improve yield rate, reduce production cost.
Description
Technical field
A kind of method that the present invention relates to centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, belongs to metal-base composites technical field.
Background technology
The anti-wear performance that ceramic-metal cellular composite material is excellent, it is widely used in cement, mine, metallurgy, power station or various similar industry, grinding roller of vertical mill application ceramic-metal cellular composite material, service life and pulverizing efficiency all will be highly improved, the ductile metal post that ceramic-metal cellular composite material work surface is surrounded by wear-resistant ceramic metal composite district and recombination region forms, there is a techniques below difficult problem in centrifugal casting ceramic honeycomb-metallic composite grinding roller of vertical mill, first how prepares high intensity, is prone to cast the honeycomb porous ceramic preforms oozed；Next to that how to splice fixed cellular porous ceramic preforms；It is finally spun casting technique and Technology for Heating Processing.
Chinese invention patent CN103252268A discloses a kind of super abrasive centrifugal composite casting fetalism grinding roller and manufacture method thereof, its outer layer is high alloy wear-resistance layer, internal layer is graphitic steel ductile layers, its alloy-layer includes Cr, Ni, Mo, W and V alloy, grinding roller manufactured by the method has wearability and toughness concurrently, but the wearability of high alloy wear-resistance layer has certain limit, and the application of high alloy material also improves production cost.Chinese invention patent CN102211048A discloses a kind of medium-speed pulverizer roller shell with cermet compositions, its method is netted for being mutually bonded to by ceramic particle, casting casting metals liquid entirety is combined, but the method suffers from the drawback that, first it relies on merely the hole casting mutually bondd between ceramic particle and produce to ooze, limit molten metal and cast the thickness oozed, so that ceramet composite bed thickness is the thinnest, and dispersion between ceramic particle is little, between ceramic particle, metal cannot effectively play supporting role, in wear process, ceramic particle easily peels off, wearability is substantially reduced；Secondly the method is by one cancellated ceramic layer of one-tenth adhered to one another for ceramic particle, then whole ceramic layer is carried out casting and oozes, and in casting cycle, whole ceramic layer is easy to because a certain regio defect or molten metal impact are caved in and can not be used, and yield rate is substantially reduced；In addition its grinding roller body is linked into an integrated entity by casting mode with high-chromium alloy and ceramic particle, owing to thermal coefficient of expansion and the thermal conductivity of three kinds of materials differ greatly, cool down or in heat treatment process after grinding roller casting, the metallurgical binding of its high-chromium alloy, ceramet recombination region and grinding roller body, by easily causing the crackle produced at faying face to extend at whole grinding roller, increases the probability of grinding roller cracking.nullChinese invention patent CN103769563A discloses a kind of active element sintering ZTA particle enhanced steel iron-based composite grinding roll and the preparation method of mill，Its method is by after various active element powders mix homogeneously，Add appropriate binding agent to be sufficiently stirred for ZTA granule，Active metallic element powder is made to be evenly coated at particle surface，Insert graphite jig heating post-drying，Sintering obtains porous preforming block，Prefabricated section is fixed on casting mold ad-hoc location casting metals liquid，Composite grinding roll or mill is obtained after cooling and demolding，The method used active element powder is Ni、The metal dusts such as Cr，Expensive，Production cost is high，Rely on the most merely Ni、The metal dusts such as Cr promote that the casting of molten metal is oozed，Casting will be made to ooze recombination region finite thickness，And the dispersion of ceramic particle is little，Ceramic particle cannot be played effective supporting role by the metal between ceramic particle.And splicing fixing means between prefabricated section is particularly critical in composite casting technology, this patent does not solve this technical problem, compared with centrifugal casting technique of the present invention, its common technology of infiltration casting is it cannot be guaranteed that molten metal casting is oozed and thoroughly obtained the best recombination region.Chinese invention patent CN1367270A discloses the production technology of a kind of centrifugal casting high wear-resistant alloy cast-iron composite wear-resisting roll collar, composite anti-wear roll ring outer layer contains vanadium and multiple oligo-element alloy cast iron, internal layer is high-strength ductile cast iron, due to containing vanadium and multiple oligo-element alloy, the hardness of the grinding roller manufactured by the method is higher, wearability is stronger, but owing to alloy species is more, addition is little, it is difficult to during molten alloy accurately control its composition, and the hardness of outer layer alloys has certain limitation, the toughness causing outer layer alloys is reduced the biggest by too high hardness, affect serviceability.nullChinese invention patent CN103736549A discloses the preparation method of a kind of vertical mill metal matrix ceramic composites grinding roller，Ceramic on metal reinforcement material used by the method is to be formed by 10 ~ 40% corundum and 60 ~ 90% iron powder sinterings，High-chromium alloy liner plate and ceramic lining plate，It is cast into one by molten steel between roller shell and grinding roller matrix，The method utilizes sintering process to prepare composite bed，Owing to ceramic particle differs greatly with iron powder proportion，It is difficult to make ceramic particle mix homogeneously with iron powder，And after molten iron is melting，Ceramic particle will swim in molten iron top layer，It will be the most uneven for being molded into the distribution of ceramic particle after mould，Tissue after this is externally sintered after metal is not completely melt crystallization to form metal structure performance good，The molten steel of casting makes roller shell be integrated with grinding roller matrix consolidation，Crackle during use is easy in whole grinding roller extension.Chinese invention patent CN103418790 discloses a kind of Anti-abrasion metal-ceramic composite product and preparation method thereof, it is characterized by mix homogeneously with metal dust used additives to obtain mixture with ceramic particle and cermet particles prefabricated component that metal dust is made, the Anti-abrasion metal-ceramic composite product formed after high temperature sintering heat treatment, the method utilizes auxiliary agent uniform hybrid ceramic granule and metal dust, but after Shao Jie after metal melting, ceramic particle will upwards float because its proportion is less than metal dust, thus cause ceramic particle skewness, and the metallic crystal formation tissue that the structure property after Shao Jie compares melting is poor.
Summary of the invention
The problem existed for above-mentioned prior art and deficiency, the present invention provides a kind of method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill.The method utilizes multiple fritter honeycomb porous ceramic preforms to be spliced into integral prefabricated body, defective fritter can be replaced, avoid in integral prefabricated production procedure, local defect causes the non-serviceable shortcoming of whole precast body, improve yield rate, reducing production cost, the present invention is achieved through the following technical solutions.
A kind of method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, it specifically comprises the following steps that
Step 1, first ceramic particle, pore creating material and binding agent are prepared precast body by 100:0.5 ~ 10:1 ~ 20 mix homogeneously, then precast body is inserted mould and prepares with the ceramic particle precast body inlaying post 1, inlaid hole 2 and sand mold contact surface and being provided with boss 3；
In step 2, some ceramic particle precast bodies step 1 obtained, the post 1 of inlaying of every ceramic particle precast body two-by-two is embedded in inlaid hole 2 splicing, then ceramic particle precast body splicing completed is fixed in the loose piece permanent mo(u)ld 7 scribbling 5 ~ 40mm thickness fireproof coating, and the boss 3 on ceramic particle precast body makes ceramic particle precast body keep the gap of 5 ~ 10mm with loose piece permanent mo(u)ld 7 inner surface；
Step 3, loose piece permanent mo(u)ld 7 entirety in step 2 is preheated to 100 ~ 600 DEG C, then it is secured by bolts in centrifugal casting apparatus, control 100 ~ 700 turns per minute of centrifugal casting apparatus, casting high-temperature liquid metal, treats that temperature is down to 800 ~ 1100 DEG C, and grinding roller is taken out in the demoulding, then air cooling is to about 100 DEG C, heating up with 20 ~ 50 DEG C/h, be incubated 2 ~ 4 hours to 250 ~ 500 DEG C, last air cooling to room temperature prepares ceramic-metal cellular composite material grinding roller of vertical mill.
One or more arbitrary proportion mixture during ceramic particle is fused alumina zirconia, aluminium oxide, zirconium oxide, silicon nitride, carborundum, boron carbide, titanium carbide, tungsten carbide, titanium boride in described step 1, granularity is 0.1 ~ 4mm.
One or more arbitrary proportion mixture during pore creating material is polystyrene, polyethylene, polyvinyl alcohol, polyformaldehyde, carbonyl diamine in described step 1, granularity is 0.1 ~ 2mm.
One or more arbitrary proportion mixture during binding agent is boric acid, aluminate cement, sodium silicate, phenolic resin, Ludox in described step 1.
Loose piece permanent mo(u)ld 7 metal shell thickness in described step 2 is 5 ~ 20mm.
Fireproof coating in described step 2 is one or more the arbitrary proportion mixture in quartz sand, zircon sand, emergy, magnesia.
In described step 3, high-temperature liquid metal is potassium steel, ni-hard cast iron, one or both arbitrary proportion mixed liquors in rich chromium cast iron, spheroidal graphite cast-iron, graphitic steel.
The invention has the beneficial effects as follows:
1, prepared high intensity, be prone to cast the honeycomb porous ceramic preforms oozed, volatilizable pore creating material is added in honeycomb porous ceramic preforms, improve casting and ooze the dispersion of composite bed thickness and ceramic particle, and low cost, and binding agent used by the present invention can make precast body have higher intensity；
2, the present invention utilizes multiple fritter honeycomb porous ceramic preforms to be spliced into integral prefabricated body, defective fritter can be replaced, it is to avoid in integral prefabricated production procedure, local defect causes the non-serviceable shortcoming of whole precast body, improve yield rate, reduce production cost；
3, can utilize precast body own structural characteristics not against outside fixture, the splicing of multiple ceramic honey comb precast bodies be integrally fixed, honeycomb porous ceramic preforms side is provided with boss, makes precast body retain certain interval with sand mold, it is simple to the comprehensive casting of molten metal is oozed；
4, the problem solving the most overall preheating of honeycomb porous preform, and then improve the effect that casting is oozed；
5, effect is oozed in the casting utilizing centrifugal force to improve molten metal, is cooled to uniform temperature and directly takes out air cooling, simplify the quenching process of grinding roller, shorten heat treatment time after spun casting molten metal；
6, manufactured ceramic honeycomb-metallic composite grinding roller of vertical mill cost performance, wearability height.
Accompanying drawing explanation
Fig. 1 is honeycomb porous preform connecting method schematic diagram of the present invention；
Fig. 2 is centrifugal casting apparatus structural representation of the present invention；
Fig. 3 is ceramic honeycomb of the present invention-metallic composite grinding roller of vertical mill structural representation；
Fig. 4 is the embodiment of the present invention 1 ceramic honeycomb-metallic composite partial duty face pictorial diagram.
In figure: 1-inlays post, 2-inlaid hole, 3-boss, the wear-resisting recombination region of 4-, 5-metallic matrix, 6-fireproof coating, 7-loose piece permanent mo(u)ld, 8-tapping hole, 9-cover plate.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention, the invention will be further described.
Embodiment 1
The method of this centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, it specifically comprises the following steps that
Step 1, first ceramic particle, pore creating material and binding agent are prepared precast body by 100:3:15 mix homogeneously, then precast body is inserted mould and prepares with the ceramic particle precast body inlaying post 1, inlaid hole 2 and sand mold contact surface and being provided with boss 3；Wherein ceramic particle is fused alumina zirconia, and granularity is 2mm；Pore creating material is polyformaldehyde, and granularity is 0.5mm；Binding agent be mass ratio be aluminate cement and the Ludox of 10:5；
In step 2, some ceramic particle precast bodies step 1 obtained, the post 1 of inlaying of every ceramic particle precast body two-by-two is embedded in inlaid hole 2 splicing, honeycomb porous preform connecting method schematic diagram is as shown in Figure 1, then ceramic particle precast body splicing completed is fixed in the loose piece permanent mo(u)ld 7 scribbling 5mm thickness fireproof coating, and the boss 3 on ceramic particle precast body makes ceramic particle precast body keep the gap of 5mm with loose piece permanent mo(u)ld 7 inner surface；Wherein metal pattern 7 metal shell thickness is 5mm；Fireproof coating is quartz sand；
Step 3, loose piece permanent mo(u)ld 7 entirety in step 2 is preheated to 400 DEG C, then it is secured by bolts in centrifugal casting apparatus, centrifugal casting apparatus structural representation is as shown in Figure 2, control 200 turns per minute of centrifugal casting apparatus, cast 1520 DEG C of high-temperature liquid metals, treat that temperature is down to 900 DEG C, grinding roller is taken out in the demoulding, then air cooling is to about 100 DEG C, heat up with 40 DEG C/h again, it is incubated 2 hours to 450 DEG C, last air cooling to room temperature prepares ceramic-metal cellular composite material grinding roller of vertical mill, ceramic-metal cellular composite material grinding roller of vertical mill structural representation is as shown in Figure 3, partial duty face pictorial diagram is as shown in Figure 1, wherein high-temperature liquid metal is potassium steel liquid.
Embodiment 2
The method of this centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, it specifically comprises the following steps that
Step 1, first ceramic particle, pore creating material and binding agent are prepared precast body by 100:1:20 mix homogeneously, then precast body is inserted mould and prepares with the ceramic particle precast body inlaying post 1, inlaid hole 2 and sand mold contact surface and being provided with boss 3；Wherein ceramic particle is titanium carbide, and granularity is 1mm；Pore creating material is polystyrene, and granularity is 0.1mm；Binding agent be mass ratio be aluminate cement and the boric acid of 5:15；
In step 2, some ceramic particle precast bodies step 1 obtained, the post 1 of inlaying of every ceramic particle precast body two-by-two is embedded in inlaid hole 2 splicing, honeycomb porous preform connecting method schematic diagram is as shown in Figure 1, then ceramic particle precast body splicing completed is fixed in the loose piece permanent mo(u)ld 7 scribbling 40mm thickness fireproof coating, and the boss 3 on ceramic particle precast body makes ceramic particle precast body keep the gap of 10mm with loose piece permanent mo(u)ld 7 inner surface；Wherein metal pattern 7 metal shell thickness is 20mm；Fireproof coating is zircon sand；
Step 3, loose piece permanent mo(u)ld 7 entirety in step 2 is preheated to 400 DEG C, then it is secured by bolts in centrifugal casting apparatus, centrifugal casting apparatus structural representation is as shown in Figure 2, control 300 turns per minute of centrifugal casting apparatus, cast 1520 DEG C of high-temperature liquid metals, treat that temperature is down to 950 DEG C, grinding roller is taken out in the demoulding, then air cooling is to about 100 DEG C, heat up with 40 DEG C/h again, it is incubated 2 hours to 450 DEG C, last air cooling to room temperature prepares ceramic-metal cellular composite material grinding roller of vertical mill, ceramic-metal cellular composite material grinding roller of vertical mill structural representation is as shown in Figure 3, wherein high-temperature liquid metal is ni-hard cast iron liquid.
Embodiment 3
The method of this centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, it specifically comprises the following steps that
Step 1, first ceramic particle, pore creating material and binding agent are prepared precast body by 100:4:15 mix homogeneously, then precast body is inserted mould and prepares with the ceramic particle precast body inlaying post 1, inlaid hole 2 and sand mold contact surface and being provided with boss 3；Wherein ceramic particle is titanium carbide, and granularity is 1mm；Pore creating material is polystyrene, and granularity is 0.1mm；Binding agent be mass ratio be aluminate cement and the boric acid of 3:12；
In step 2, some ceramic particle precast bodies step 1 obtained, the post 1 of inlaying of every ceramic particle precast body two-by-two is embedded in inlaid hole 2 splicing, honeycomb porous preform connecting method schematic diagram is as shown in Figure 1, then ceramic particle precast body splicing completed is fixed in the loose piece permanent mo(u)ld 7 scribbling 20mm thickness fireproof coating, and the boss 3 on ceramic particle precast body makes ceramic particle precast body keep the gap of 8mm with loose piece permanent mo(u)ld 7 inner surface；Wherein metal pattern 7 metal shell thickness is 10mm；Fireproof coating is emergy and the magnesia mixture of quality 1:1；
Step 3, loose piece permanent mo(u)ld 7 entirety in step 2 is preheated to 400 DEG C, then it is secured by bolts in centrifugal casting apparatus, centrifugal casting apparatus structural representation is as shown in Figure 2, control 200 turns per minute of centrifugal casting apparatus, cast 1520 DEG C of high-temperature liquid metals, treat that temperature is down to 950 DEG C, grinding roller is taken out in the demoulding, then air cooling is to about 100 DEG C, heat up with 30 DEG C/h again, it is incubated 2 hours to 450 DEG C, last air cooling to room temperature prepares ceramic-metal cellular composite material grinding roller of vertical mill, ceramic-metal cellular composite material grinding roller of vertical mill structural representation is as shown in Figure 3, wherein high-temperature liquid metal is rich chromium cast iron liquid.
Embodiment 4
The method of this centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, it specifically comprises the following steps that
Step 1, first ceramic particle, pore creating material and binding agent are prepared precast body by 100:2:13 mix homogeneously, then precast body is inserted mould and prepares with the ceramic particle precast body inlaying post 1, inlaid hole 2 and sand mold contact surface and being provided with boss 3；Wherein ceramic particle is titanium carbide, and granularity is 1.5mm；Pore creating material is polystyrene, and granularity is 0.3mm；Binding agent be mass ratio be aluminate cement and the phenolic resin of 3:10；
In step 2, some ceramic particle precast bodies step 1 obtained, the post 1 of inlaying of every ceramic particle precast body two-by-two is embedded in inlaid hole 2 splicing, connecting method schematic diagram is as shown in Figure 1, then ceramic particle precast body splicing completed is fixed in the loose piece permanent mo(u)ld 7 scribbling 30mm thickness fireproof coating, and the boss 3 on ceramic particle precast body makes ceramic particle precast body keep the gap of 6mm with loose piece permanent mo(u)ld 7 inner surface；Wherein metal pattern 7 metal shell thickness is 15mm；Fireproof coating is zircon sand and the magnesia mixture of quality 1:1；
Step 3, loose piece permanent mo(u)ld 7 entirety in step 2 is preheated to 400 DEG C, then it is secured by bolts in centrifugal casting apparatus, heart Casting Equipment structural representation is as shown in Figure 2, control 300 turns per minute of centrifugal casting apparatus, cast 1520 DEG C of high-temperature liquid metals, treat that temperature is down to 850 DEG C, grinding roller is taken out in the demoulding, then air cooling is to about 100 DEG C, heat up with 40 DEG C/h again, it is incubated 2 hours to 450 DEG C, last air cooling to room temperature prepares ceramic-metal cellular composite material grinding roller of vertical mill, ceramic-metal cellular composite material grinding roller of vertical mill structural representation is as shown in Figure 3, wherein high-temperature liquid metal is ni-hard cast iron liquid.
Embodiment 5
The method of this centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, it specifically comprises the following steps that
Step 1, first ceramic particle, pore creating material and binding agent are prepared precast body by 100:3:15 mix homogeneously, then precast body is inserted mould and prepares with the ceramic particle precast body inlaying post 1, inlaid hole 2 and sand mold contact surface and being provided with boss 3；Wherein ceramic particle is fused alumina zirconia, and granularity is 2mm；Pore creating material is polyformaldehyde, and granularity is 0.5mm；Binding agent be mass ratio be aluminate cement and the Ludox of 5:10；
In step 2, some ceramic particle precast bodies step 1 obtained, the post 1 of inlaying of every ceramic particle precast body two-by-two is embedded in inlaid hole 2 splicing, honeycomb porous preform connecting method schematic diagram is as shown in Figure 1, then ceramic particle precast body splicing completed is fixed in the loose piece permanent mo(u)ld 7 scribbling 20mm thickness fireproof coating, and the boss 3 on ceramic particle precast body makes ceramic particle precast body keep the gap of 8mm with loose piece permanent mo(u)ld 7 inner surface；Wherein metal pattern 7 metal shell thickness is 18mm；Fireproof coating is zircon sand and the emergy mixture of quality 1:1；
Step 3, loose piece permanent mo(u)ld 7 entirety in step 2 is preheated to 400 DEG C, then it is secured by bolts in centrifugal casting apparatus, centrifugal casting apparatus structural representation is as shown in Figure 2, control 200 turns per minute of centrifugal casting apparatus, cast 1250 ~ 1380 DEG C of high-temperature liquid metals, treat that temperature is down to 900 DEG C, grinding roller is taken out in the demoulding, then air cooling is to about 100 DEG C, heat up with 20 DEG C/h again, it is incubated 2 hours to 450 DEG C, last air cooling to room temperature prepares ceramic-metal cellular composite material grinding roller of vertical mill, ceramic honeycomb-metallic composite grinding roller of vertical mill structural representation is as shown in Figure 3, wherein high-temperature liquid metal is spheroidal graphite cast-iron liquid.
Embodiment 6
The method of this centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, it specifically comprises the following steps that
Step 1, first ceramic particle, pore creating material and binding agent are prepared precast body by 100:0.5:1 mix homogeneously, then precast body is inserted mould and prepares with the ceramic particle precast body inlaying post 1, inlaid hole 2 and sand mold contact surface and being provided with boss 3；Wherein ceramic particle is the aluminium oxide of quality 1:1:1:1, zirconium oxide, silicon nitride and silicon carbide blend, and granularity is 0.1mm；Pore creating material is polyvinyl alcohol, and granularity is 2mm；Binding agent is sodium silicate；
In step 2, some ceramic particle precast bodies step 1 obtained, the post 1 of inlaying of every ceramic particle precast body two-by-two is embedded in inlaid hole 2 splicing, honeycomb porous preform connecting method schematic diagram is as shown in Figure 1, then ceramic particle precast body splicing completed is fixed in the loose piece permanent mo(u)ld 7 scribbling 30mm thickness fireproof coating, and the boss 3 on ceramic particle precast body makes ceramic particle precast body keep the gap of 6mm with loose piece permanent mo(u)ld 7 inner surface；Wherein metal pattern 7 metal shell thickness is 15mm；Fireproof coating is zircon sand and the magnesia mixture of quality 1:1；
Step 3, loose piece permanent mo(u)ld 7 entirety in step 2 is preheated to 100 DEG C, then it is secured by bolts in centrifugal casting apparatus, centrifugal casting apparatus structural representation is as shown in Figure 2, control 700 turns per minute of centrifugal casting apparatus, cast 1520 DEG C of high-temperature liquid metals, treat that temperature is down to 800 DEG C, grinding roller is taken out in the demoulding, then air cooling is to about 100 DEG C, heat up with 50 DEG C/h again, it is incubated 3 hours to 250 DEG C, last air cooling to room temperature prepares ceramic-metal cellular composite material grinding roller of vertical mill, ceramic-metal cellular composite material grinding roller of vertical mill structural representation is as shown in Figure 3, wherein high-temperature liquid metal be mass ratio be rich chromium cast iron and the spheroidal graphite cast-iron liquid of 1:1.
Embodiment 7
The method of this centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, it specifically comprises the following steps that
Step 1, first ceramic particle, pore creating material and binding agent are prepared precast body by 100:10:15 mix homogeneously, then precast body is inserted mould and prepares with the ceramic particle precast body inlaying post 1, inlaid hole 2 and sand mold contact surface and being provided with boss 3；Wherein ceramic particle is the boron carbide of quality 1:1:1, tungsten carbide and titanium boride mixture, and granularity is 4mm；Pore creating material be mass ratio be polyvinyl alcohol and the carbonyl diamine mixture of 1:1, granularity is 1.8mm；Binding agent is sodium silicate；
In step 2, some ceramic particle precast bodies step 1 obtained, the post 1 of inlaying of every ceramic particle precast body two-by-two is embedded in inlaid hole 2 splicing, honeycomb porous preform connecting method schematic diagram is as shown in Figure 1, then ceramic particle precast body splicing completed is fixed in the loose piece permanent mo(u)ld 7 scribbling 30mm thickness fireproof coating, and the boss 3 on ceramic particle precast body makes ceramic particle precast body keep the gap of 6mm with loose piece permanent mo(u)ld 7 inner surface；Wherein metal pattern 7 metal shell thickness is 15mm；Fireproof coating is zircon sand and the magnesia mixture of quality 1:1；
Step 3, loose piece permanent mo(u)ld 7 entirety in step 2 is preheated to 600 DEG C, then it is secured by bolts in centrifugal casting apparatus, centrifugal casting apparatus structural representation is as shown in Figure 2, control 100 turns per minute of centrifugal casting apparatus, cast 1520 DEG C of high-temperature liquid metals, treat that temperature is down to 1100 DEG C, grinding roller is taken out in the demoulding, then air cooling is to about 100 DEG C, heat up with 40 DEG C/h again, it is incubated 4 hours to 500 DEG C, last air cooling to room temperature prepares ceramic-metal cellular composite material grinding roller of vertical mill, ceramic honeycomb-metallic composite grinding roller of vertical mill structural representation is as shown in Figure 3, wherein high-temperature liquid metal is graphite molten steel.
Above in conjunction with accompanying drawing, the detailed description of the invention of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible on the premise of without departing from present inventive concept, various changes can be made.
Claims (7)
1. the method for a centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill, it is characterised in that specifically comprise the following steps that
Step 1, first ceramic particle, pore creating material and binding agent are prepared precast body by 100:0.5 ~ 10:1 ~ 20 mix homogeneously, then precast body is prepared with the ceramic particle precast body inlaying post (1), inlaid hole (2) and sand mold contact surface and being provided with boss (3) by inserting mould；
In step 2, some ceramic particle precast bodies step 1 obtained, the post (1) of inlaying of every ceramic particle precast body two-by-two is embedded in splicing in inlaid hole (2), then ceramic particle precast body splicing completed is fixed in the loose piece permanent mo(u)ld (7) scribbling 5 ~ 40mm thickness fireproof coating, and the boss (3) on ceramic particle precast body makes ceramic particle precast body keep the gap of 5 ~ 10mm with loose piece permanent mo(u)ld (7) inner surface；
Step 3, loose piece permanent mo(u)ld (7) entirety in step 2 is preheated to 100 ~ 600 DEG C, then it is secured by bolts in centrifugal casting apparatus, control 100 ~ 700 turns per minute of centrifugal casting apparatus, casting high-temperature liquid metal, treats that temperature is down to 800 ~ 1100 DEG C, and grinding roller is taken out in the demoulding, then air cooling is to about 100 DEG C, heating up with 20 ~ 50 DEG C/h, be incubated 2 ~ 4 hours to 250 ~ 500 DEG C, last air cooling to room temperature prepares ceramic-metal cellular composite material grinding roller of vertical mill.
The method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill the most according to claim 1, it is characterized in that: one or more the arbitrary proportion mixture during ceramic particle is fused alumina zirconia, aluminium oxide, zirconium oxide, silicon nitride, carborundum, boron carbide, titanium carbide, tungsten carbide, titanium boride in described step 1, granularity is 0.1 ~ 4mm.
The method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill the most according to claim 1, it is characterized in that: one or more the arbitrary proportion mixture during pore creating material is polystyrene, polyethylene, polyvinyl alcohol, polyformaldehyde, carbonyl diamine in described step 1, granularity is 0.1 ~ 2mm.
The method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill the most according to claim 1, it is characterised in that: one or more the arbitrary proportion mixture during binding agent is boric acid, aluminate cement, sodium silicate, phenolic resin, Ludox in described step 1.
The method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill the most according to claim 1, it is characterised in that: loose piece permanent mo(u)ld (7) the metal shell thickness in described step 2 is 5 ~ 20mm.
The method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill the most according to claim 1, it is characterised in that: the fireproof coating in described step 2 is one or more the arbitrary proportion mixture in quartz sand, zircon sand, emergy, magnesia.
The method of centrifugal casting ceramic-metal cellular composite material grinding roller of vertical mill the most according to claim 1, it is characterized in that: in described step 3, high-temperature liquid metal is potassium steel, ni-hard cast iron, one or both arbitrary proportion mixed liquors in rich chromium cast iron, spheroidal graphite cast-iron, graphitic steel.
Priority Applications (1)
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| CN106925761A (en) * | 2017-05-10 | 2017-07-07 | 重庆罗曼新材料科技有限公司 | The preparation method of ceramic particle metallic composite precast body and ceramet composite wear-resistant part |
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| JPH01154861A (en) * | 1987-12-14 | 1989-06-16 | Toshiba Corp | Production of gear |
| US4871008A (en) * | 1988-01-11 | 1989-10-03 | Lanxide Technology Company, Lp | Method of making metal matrix composites |
| CN101239382B (en) * | 2008-03-12 | 2010-06-02 | 成都利君科技有限责任公司 | Abrasion-proof composite roller, board and manufacturing method thereof |
| CN102534433A (en) * | 2012-01-12 | 2012-07-04 | 北京理工大学 | Amorphous alloy cellular material and preparation method thereof |
| CN103203448B (en) * | 2013-02-20 | 2015-02-11 | 邓金刚 | Method for manufacturing metal matrix ceramic composite part |
| CN103641487B (en) * | 2013-12-02 | 2014-12-31 | 昆明理工大学 | Preparation method and application of ceramic preform |
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| CN106925761A (en) * | 2017-05-10 | 2017-07-07 | 重庆罗曼新材料科技有限公司 | The preparation method of ceramic particle metallic composite precast body and ceramet composite wear-resistant part |
| CN106925761B (en) * | 2017-05-10 | 2019-03-26 | 重庆罗曼新材料科技有限公司 | The preparation method of ceramic particle metallic composite precast body and ceramet composite wear-resistant part |
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