CN105256162A - Preparation method for metal ceramic composite - Google Patents
Preparation method for metal ceramic composite Download PDFInfo
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- CN105256162A CN105256162A CN201510750486.5A CN201510750486A CN105256162A CN 105256162 A CN105256162 A CN 105256162A CN 201510750486 A CN201510750486 A CN 201510750486A CN 105256162 A CN105256162 A CN 105256162A
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Abstract
A preparation method for a metal ceramic composite comprises the steps of preparation of aluminium oxide ceramic microencapsulated powder, preparation of ceramic particles, preparation of metal ceramic particles and preparation of the metal ceramic composite. The prepared metal ceramic composite is of a structure composed of a ceramic layer, a metal ceramic composite transition layer and a metal layer from inside to outside, an even and compact product with the smooth surface is formed at a high temperature, the composite with the high hardness of ceramics and high toughness and plasticity of metal is formed, and the metal ceramic composite not only has good corrosion resistance and high temperature resistance of the ceramics, but also has the toughness and impact resistance of the metal, and has the characteristics of long service life and low mass.
Description
Technical field
The present invention relates to ceramic technology field, be specifically related to a kind of preparation method of sintering metal complex body.
Background technology
Be applied to the material loading of blast furnace, lower trolley, feeding chute, at the bottom of the raw material storages such as sintering, coke, owing to loading the major part such as ore, coke with comparatively sharply sharp corner angle, wash away comparatively serious to the wearing and tearing of dolly/chute/bottom of the reservior.Meanwhile, because truck weight is large, the load of wireline, elevator motor, step-down gear is large, very easily break down, cause heavy economic losses, the work-ing life of truck be improved, first must solve the resistance to erosion of truck liner plate, wear-resistant and truck own wt problem; Each truck weighs 9.3 tons, original design Mn13 liner plate, and abrasion resistance properties is general, and work-ing life is short, and maintenance, repair amount is large, and consumption spare part fund is more, and maintenance cost is higher.And, in Steel Plant, in the general employing 24h cycle operation cycle, the flows such as iron ore, coking coal, coke are comparatively large, and the conveying time is longer, easily cause output equipment, particularly feeding chute serious wear, occurs being forced to repairing phenomenon of stopping through production period of being everlasting, and, at tens meters, tens meters in the air, dismounting and replacing extremely bother in part chute installation site.Therefore, the wear resistance and the resistance to impact shock that improve blast furnace equipment are very important, install the inner lining material being adapted to Different field situation and the raw-material speed of conveying can be made to accelerate, or realize the key point of safety in production, energy efficiency.
Summary of the invention
The object of the invention is for poor, the not impact-resistant defect of existing lining body material wear-resistant performance, provide a kind of can as the preparation method of the sintering metal complex body of lining body material.
The technical scheme that the present invention is adopted for achieving the above object is: the preparation method of sintering metal complex body, comprise the following steps: step one, take microcapsule powder, aluminum oxide powder and dehydrated alcohol according to the weight ratio of 1:3:3, at the ultrasonic frequency ultrasonic disperse 20 ~ 25min of 40 ~ 50KHz after mixing, then be carry out suction filtration under the vacuum condition of 0.098MPa in vacuum tightness, suction filtration is stopped when no longer including ethanol drips, take out much filtrate, for subsequent use;
Step 2, much filtrate obtained for step one is placed in baking oven, carry out the oven dry of 30 DEG C × 6h and the preheating of 50 DEG C × 20min successively, take out the material after preheating and be placed in pressing machine, precompressed 5min under 2MPa pressure, and then under 5MPa, 150 DEG C of conditions hot pressing 30min, after naturally cooling to room temperature, obtained alumina-ceramic microcapsule powder, for subsequent use;
Step 3, alumina-ceramic microcapsule powder obtained for step 2 is carried out granulation, obtained particle diameter is the ceramic particle of 2.5 ~ 3mm, for subsequent use;
Step 4, according to mass percent, take the obtained ceramic particle of 70 ~ 90% step 3 and 10 ~ 30% iron alloy powders, and quality is the organic bond of ceramic particle and iron alloy powder total mass 1.2 ~ 2%, dry after granulation, obtained particle diameter is the cermet particles of 3 ~ 5mm, for subsequent use;
Step 5, take cermet particles and iron alloy according to the weight ratio of 3:1, add in the mould that makes in advance after mixing, and mould is sent into thermocompressor, at 1200 ~ 1350 DEG C, be forced into pressure reach 34 ~ 40MPa, after pressurize 30min, be cooled to 100 DEG C of taking-ups, obtained sintering metal complex body.
Wherein, the prilling process of step 3 ceramic particle comprises following two kinds: one, be that the obtained alumina-ceramic microcapsule powder of the polyvinyl alcohol of 3:25 and step 2 mixes in high-speed mixer by weight ratio, obtained mixture, then this mixture is added twin screw extruder extruding pelletization, screw speed is set as 40 ~ 50r/min, barrel zone temperature is: 175 DEG C, a district, 180 DEG C, 2nd district, 175 DEG C, three DEG CHe tetra-district of district 180, granulation time is 20 ~ 25min.
Two, the prilling process of step 3 ceramic particle is, by weight ratio is the organic bond of 1:18 and the obtained obtained wet feed of alumina-ceramic microcapsule powder mixing of step 2, according to the weight ratio of 1:2:1, ball mill is loaded after wet feed, abrading-ball and deionized water being mixed, obtained suspension after ball milling certain hour, adopt press spray moisture eliminator, by suspension and warm air mixed atomizing, obtained ceramic particle.Further, the temperature of warm air is 110 DEG C, and the aperture of the jet orifice plate of press spray moisture eliminator is 2.5 ~ 3mm.
In the present invention, the particle diameter of step 4 cermet particles is 3.5 ~ 4.5mm.
In the present invention, in step 5, the temperature of thermocompressor inside is 1260 ~ 1300 DEG C.
The present invention only utilizes organic bond as admixture when ceramic particle and cermet particles granulation, when hot pressing, then utilize the metallographic phase in cermet particles and the melting at 1200 ~ 1350 DEG C of additional iron alloy, the metal do not added in the same time is all for toughening ceramic phase, under 34 ~ 40MPa pressure during hot pressing, obtain plasticity by iron alloy and absorb applied load, strengthen the bonding force between metallographic phase and ceramic phase.
Beneficial effect: 1, the alumina-ceramic microcapsule powder that obtains of the present invention, alumina-ceramic pruinescence is coated in microcapsule, after granulation, ceramic particle and iron alloy powder bonding force improve, obtained cermet particles, ceramic phase is covered, typically with metal layers wraps up completely, and metal level is thinner between ceramic crystalline grain, two combine closely, when being subject to stress deformation, small size spherocrystal produces the small crazing in many places just better can absorb striking energy, thus improves its toughness.
2, the present invention utilizes ceramic particle and iron alloy powder to obtain cermet particles, then the hot briquetting in thermocompressor by iron alloy and cermet particles, metallographic phase and ceramic phase are evenly distributed, and have part ceramic microcapsules powder to be placed in metal layer itself, when complex body abrasion is to metal layer itself, microcapsules rupture, inner ceramic phase exposes, and improves wear resistance and the work-ing life of complex body.
3, the sintering metal complex body that obtains of the present invention, there is the structure be made up of ceramic layer, sintering metal compound transition layer, metal level three part respectively from inside to outside, at high temperature form even compact, ganoid goods, define the complex body with ceramic high rigidity and metal high tenacity high-ductility, not only there is resistance to abrasion, high thermal resistance that pottery is good, and there is toughness, the shock-resistance of metal, have the advantages that the life-span is long, quality is light.Performance index are: ultimate compression strength >=600MPa, water-intake rate≤0.02%, and Mohs' hardness is 9.
4, the sintering metal complex body that obtains of the present invention; can as the high-abrasive material in multiple dust, particle and block material transport process flow process; can improve the safety coefficient of unexpected shutdown, reduce maintenance cost, nationality has the minimizing of abraded area material emission to improve effective control of polluting in producing region.
Embodiment
Below in conjunction with specific embodiment, the preparation method to sintering metal complex body of the present invention is described further, and can better understand the present invention and can be implemented, but illustrated embodiment is not as a limitation of the invention to make those skilled in the art.
Embodiment 1
The preparation method of sintering metal complex body, comprise the following steps: step one, take microcapsule powder, aluminum oxide powder and dehydrated alcohol according to the weight ratio of 1:3:3, at the ultrasonic frequency ultrasonic disperse 25min of 45KHz after mixing, then be carry out suction filtration under the vacuum condition of 0.098MPa in vacuum tightness, suction filtration is stopped when no longer including ethanol drips, take out much filtrate, for subsequent use;
Step 2, much filtrate obtained for step one is placed in baking oven, carry out the oven dry of 30 DEG C × 6h and the preheating of 50 DEG C × 20min successively, take out the material after preheating and be placed in pressing machine, precompressed 5min under 2MPa pressure, and then under 5MPa, 150 DEG C of conditions hot pressing 30min, after naturally cooling to room temperature, obtained alumina-ceramic microcapsule powder, for subsequent use;
Step 3, be that the obtained alumina-ceramic microcapsule powder of the polyvinyl alcohol of 3:25 and step 2 mixes in high-speed mixer by weight ratio, obtained mixture, then this mixture is added twin screw extruder extruding pelletization, screw speed is set as 45r/min, barrel zone temperature is: 175 DEG C, a district, 180 DEG C, 2nd district, 175 DEG C, three DEG CHe tetra-district of district 180, granulation time is 25min, and obtained particle diameter is the ceramic particle of 2.5mm, for subsequent use;
Step 4, according to mass percent, take the obtained ceramic particle of 80% step 3 and 20% iron alloy powder, and quality is the organic bond of ceramic particle and iron alloy powder total mass 1.3%, dry after granulation, obtained particle diameter is the cermet particles of 4.5mm, for subsequent use;
Step 5, take cermet particles and iron alloy according to the weight ratio of 3:1, add after mixing in the mould that makes in advance, and mould is sent into thermocompressor, at 1260 DEG C, be forced into pressure reach 40MPa, after pressurize 30min, be cooled to 100 DEG C of taking-ups, obtained sintering metal complex body.
Embodiment 2
The preparation method of sintering metal complex body, comprise the following steps: step one, take microcapsule powder, aluminum oxide powder and dehydrated alcohol according to the weight ratio of 1:3:3, at the ultrasonic frequency ultrasonic disperse 23min of 40KHz after mixing, then be carry out suction filtration under the vacuum condition of 0.098MPa in vacuum tightness, suction filtration is stopped when no longer including ethanol drips, take out much filtrate, for subsequent use;
Step 2, much filtrate obtained for step one is placed in baking oven, carry out the oven dry of 30 DEG C × 6h and the preheating of 50 DEG C × 20min successively, take out the material after preheating and be placed in pressing machine, precompressed 5min under 2MPa pressure, and then under 5MPa, 150 DEG C of conditions hot pressing 30min, after naturally cooling to room temperature, obtained alumina-ceramic microcapsule powder, for subsequent use;
Step 3, be the obtained alumina-ceramic microcapsule powder mixing of the organic bond of 1:18 and step 2 by weight ratio, obtained wet feed, according to the weight ratio of 1:2:1, after wet feed, abrading-ball and deionized water being mixed, load ball mill, obtained suspension after ball milling certain hour, adopt press spray moisture eliminator, by suspension and warm air mixed atomizing, obtained ceramic particle, wherein, the temperature of warm air is 110 DEG C, and the aperture of the jet orifice plate of press spray moisture eliminator is 2.7mm;
Step 4, according to mass percent, take the obtained ceramic particle of 90% step 3 and 10% iron alloy powder, and quality is the organic bond of ceramic particle and iron alloy powder total mass 2%, dry after granulation, obtained particle diameter is the cermet particles of 3.5mm, for subsequent use;
Step 5, take cermet particles and iron alloy according to the weight ratio of 3:1, add after mixing in the mould that makes in advance, and mould is sent into thermocompressor, at 1300 DEG C, be forced into pressure reach 35MPa, after pressurize 30min, be cooled to 100 DEG C of taking-ups, obtained sintering metal complex body.
Embodiment 3
The preparation method of sintering metal complex body, comprise the following steps: step one, take microcapsule powder, aluminum oxide powder and dehydrated alcohol according to the weight ratio of 1:3:3, at the ultrasonic frequency ultrasonic disperse 20min of 50KHz after mixing, then be carry out suction filtration under the vacuum condition of 0.098MPa in vacuum tightness, suction filtration is stopped when no longer including ethanol drips, take out much filtrate, for subsequent use;
Step 2, much filtrate obtained for step one is placed in baking oven, carry out the oven dry of 30 DEG C × 6h and the preheating of 50 DEG C × 20min successively, take out the material after preheating and be placed in pressing machine, precompressed 5min under 2MPa pressure, and then under 5MPa, 150 DEG C of conditions hot pressing 30min, after naturally cooling to room temperature, obtained alumina-ceramic microcapsule powder, for subsequent use;
Step 3, alumina-ceramic microcapsule powder obtained for step 2 is carried out granulation, obtained particle diameter is the ceramic particle of 3mm, for subsequent use;
Step 4, according to mass percent, take the obtained ceramic particle of 70% step 3 and 30% iron alloy powder, and quality is the organic bond of ceramic particle and iron alloy powder total mass 1.2%, dry after granulation, obtained particle diameter is the cermet particles of 5mm, for subsequent use;
Step 5, take cermet particles and iron alloy according to the weight ratio of 3:1, add after mixing in the mould that makes in advance, and mould is sent into thermocompressor, at 1350 DEG C, be forced into pressure reach 35MPa, after pressurize 30min, be cooled to 100 DEG C of taking-ups, obtained sintering metal complex body.
The complex body obtained to above-described embodiment 1 ~ 3 carries out fastness to rubbing test, and condition is P=276n, n=800r/min, t=30min, the fastness to rubbing≤0.0009g recorded.
Utilize transmission electron microscope, High Resolution Observations discovery is carried out to the sintering metal complex body of above-described embodiment, there is width at phase interface is the transition layers of 80 ~ 100 dusts also in micritization, namely the crystallite being ten a few to tens of dusts by crystal grain forms, when crackle is by this transition layer, micritization structure makes the stress concentration portion branch of crack tip with larger viscous deformation, and required strain energy is increased, and complex body toughness is improved.
Claims (6)
1. the preparation method of sintering metal complex body, is characterized in that, comprises the following steps:
Step one, take microcapsule powder, aluminum oxide powder and dehydrated alcohol according to the weight ratio of 1:3:3, at the ultrasonic frequency ultrasonic disperse 20 ~ 25min of 40 ~ 50KHz after mixing, then be carry out suction filtration under the vacuum condition of 0.098MPa in vacuum tightness, suction filtration is stopped when no longer including ethanol drips, take out much filtrate, for subsequent use;
Step 2, much filtrate obtained for step one is placed in baking oven, carry out the oven dry of 30 DEG C × 6h and the preheating of 50 DEG C × 20min successively, take out the material after preheating and be placed in pressing machine, precompressed 5min under 2MPa pressure, and then under 5MPa, 150 DEG C of conditions hot pressing 30min, after naturally cooling to room temperature, obtained alumina-ceramic microcapsule powder, for subsequent use;
Step 3, alumina-ceramic microcapsule powder obtained for step 2 is carried out granulation, obtained particle diameter is the ceramic particle of 2.5 ~ 3mm, for subsequent use;
Step 4, according to mass percent, take the obtained ceramic particle of 70 ~ 90% step 3 and 10 ~ 30% iron alloy powders, and quality is the organic bond of ceramic particle and iron alloy powder total mass 1.2 ~ 2%, dry after granulation, obtained particle diameter is the cermet particles of 3 ~ 5mm, for subsequent use;
Step 5, take cermet particles and iron alloy according to the weight ratio of 3:1, add in the mould that makes in advance after mixing, and mould is sent into thermocompressor, at 1200 ~ 1350 DEG C, be forced into pressure reach 34 ~ 40MPa, after pressurize 30min, be cooled to 100 DEG C of taking-ups, obtained sintering metal complex body.
2. the preparation method of sintering metal complex body according to claim 1, it is characterized in that: the prilling process of step 3 ceramic particle is, be that the obtained alumina-ceramic microcapsule powder of the polyvinyl alcohol of 3:25 and step 2 mixes in high-speed mixer by weight ratio, obtained mixture, then this mixture is added twin screw extruder extruding pelletization, screw speed is set as 40 ~ 50r/min, barrel zone temperature is: 175 DEG C, a district, 180 DEG C, 2nd district, 175 DEG C, three DEG CHe tetra-district of district 180, granulation time is 20 ~ 25min.
3. the preparation method of sintering metal complex body according to claim 1, it is characterized in that: the prilling process of step 3 ceramic particle is, it is the obtained obtained wet feed of alumina-ceramic microcapsule powder mixing of the organic bond of 1:18 and step 2 by weight ratio, according to the weight ratio of 1:2:1, ball mill is loaded after wet feed, abrading-ball and deionized water being mixed, obtained suspension after ball milling certain hour, adopt press spray moisture eliminator, by suspension and warm air mixed atomizing, obtained ceramic particle.
4. the preparation method of sintering metal complex body according to claim 3, is characterized in that: the temperature of warm air is 110 DEG C, and the aperture of the jet orifice plate of press spray moisture eliminator is 2.5 ~ 3mm.
5. the preparation method of sintering metal complex body according to claim 1, is characterized in that: the particle diameter of step 4 cermet particles is 3.5 ~ 4.5mm.
6. the preparation method of sintering metal complex body according to claim 1, is characterized in that: in step 5, and the temperature of thermocompressor inside is 1260 ~ 1300 DEG C.
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| CN107150120A (en) * | 2017-04-14 | 2017-09-12 | 洛阳鹏飞耐磨材料股份有限公司 | A kind of preparation technology of alloy silicate complex matrix ceramic wafer |
| CN107312499A (en) * | 2017-07-18 | 2017-11-03 | 洛阳理工学院 | A kind of ball mill metal and Ceramic Composite abrasive media and preparation method thereof |
| CN109650922A (en) * | 2019-01-10 | 2019-04-19 | 广东昭信照明科技有限公司 | The silicon-carbide-based composite ceramic material of SU-304L metal enhancing and its preparation method of master batch |
| CN111590077A (en) * | 2020-05-28 | 2020-08-28 | 南通旺鑫新材料有限公司 | Powder metallurgy car synchronizer gear hub and production method thereof |
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