CN104726775A - Iron-chromium-aluminum-based porous alloy material and preparation method thereof - Google Patents
Iron-chromium-aluminum-based porous alloy material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an iron-chromium-aluminum-based porous alloy material which can be used for filtering dust or high-temperature fluid and is excellent in high temperature strength and a preparation method thereof. The alloy material comprises the following components: aluminum, chromium, silicon carbide, rare earth and iron; the preparation method of the alloy material comprises the steps of preparation of iron-chromium-aluminum-based alloy powder and particles, preparation of a slurry material, cast molding, thermal degreasing, sintering and the like. The alloy material disclosed by the invention is reasonable in component proportion, simple in preparation process, low in cost, good in mechanical property, high in thermal shock resistance, good in corrosion resistance and oxidation resistance, adjustable in porosity and hole diameter size and especially good in heat transfer property, lays the foundation for widening the application of the material from filtration to the field such as heat transfer in an extreme environment, and is suitable for industrial production.
Description
Technical field
The present invention relates to the aluminium-based porous alloy material of a kind of siderochrome and preparation method, to be adapted to especially dust or high temperature fluid filtration and hot strength is excellent, belong to multi-porous alloy material preparing technical field.
Background technology
The pore property of porous metal uniqueness, the multiple physicalies such as it is possessed filtration, sound absorption, sound insulation, heat radiation, fire-retardant, damping, therefore, they all have wide practical use in each high-tech areas such as space flight, aviation, transport, electronics, military project, chemical industry, environmental protection, the energy, machinery, biologies.But the domestic and international research at high-melting-point porous metal this part is not at present also a lot, and mainly concentrates on and study as matrix using the material such as iron and stainless steel.But the corrosion-resistant and antioxidant property of iron and stainless steel porous metal has defect to a certain degree, can not adapt to the requirement of some specific Working environment, therefore, the material that selectivity is more excellent is to prepare porous metal, matrix just seems that meaning is very great.
Aludirome is a class Alfer; because can Surface Creation one deck and the compact compact aluminum oxide protective membrane of matrix in high temperature environments; make it have corrosion-resistant, anti-oxidant, impervious carbon and the advantage such as wear-resisting, thus high-temperature dust or high temperature fluid filter and in catalytic carrier etc. application prospect very large.Also having carried out some at present both at home and abroad adopts Aludirome to be that matrix is to prepare the research of porous metal material, as: first patent CN102286669A sprays chromium powder and aluminium powder on the porous inseries such as polyurethane sponge, carries out Electrodeposition Bath of Iron and obtain ferrum-chromium-aluminum porous material after the operations such as conductive resin dip-coating, heating cure; Patent CN101172257A prepare bubble iron chromium aluminum be with foam shape metal (iron, nickel, copper and alloy thereof etc.) for base material, carry out flame plating ferrum-chromium-aluminum at the porous surface of base material and obtain.Although these methods can prepare ferrum-chromium-aluminum porous metal material, there is the problem such as complex process, raw materials cost height; After on the other hand existing ferrum-chromium-aluminum material at high temperature uses, because grain growth makes it become easily crisp, thus have impact on this kind of material work-ing life in high temperature environments.
For ferrum-chromium-aluminum in high temperature environments easily crisp and existing ferrum-chromium-aluminum based porous materials prepare the problems such as preparation cost is high, the present inventor, through repeatedly studying, has invented a kind of new ferrum-chromium-aluminum based porous materials preparation method.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art and improve the aluminium-based porous alloy material of siderochrome and preparation method that a kind of heat impact strength is good, resistance to high temperature corrosion performance is excellent, filterableness good, intensity is high.
The aluminium-based porous alloy material of a kind of siderochrome of the present invention, comprises following component, forms by mass percentage:
Aluminium 3-7,
Chromium 15-25,
Silicon carbide 2-10,
Rare earth 0.03-0.5, surplus is iron.
The aluminium-based porous alloy material of a kind of siderochrome of the present invention, described rare earth is mixed rare earth of lanthanum and cerium or rare-earth yttrium, and in mixed rare earth of lanthanum and cerium, the quality of each component configures in any proportion.
The aluminium-based porous alloy material of a kind of siderochrome of the present invention, the ferrum-chromium-aluminum base alloy material particle that described multi-porous alloy material is 0.5-3.5mm by diameter is consisted of metallurgical binding, selected and grain composition by ferrum-chromium-aluminum base alloy material grain diameter, realize the adjustment of multi-porous alloy material porosity and pore size.
The preparation method of the aluminium-based porous alloy material of a kind of siderochrome of the present invention, comprises the steps:
The first step: preparation is containing the iron-silicon carbide agglomerate of rare earth
According to the quality proportioning of silicon carbide, rare earth in the aluminium-based porous alloy material of siderochrome of design, by the mass ratio of the silicon carbide after amplification in proportion, rare earth, take carborundum powder, rare earth respectively, mixed powder is mixed to get with iron powder, after mixed powder vacuum ball milling is mixed, compression moulding, after 1200-1300 DEG C of vacuum sintering 1-3 hour, furnace cooling obtains the iron-silicon carbide agglomerate containing rare earth; The total mass and the iron powder mass ratio that control carborundum powder and rare earth in mixed powder are 1:1-2;
Second step: the aluminium base alloy pig of siderochrome preparing silicon carbide-containing, rare earth
According to the quality containing the iron-silicon carbide agglomerate middle-weight rare earths of rare earth, silicon carbide, iron that the first step obtains, by each component proportion of the aluminium-based porous alloy material of siderochrome of design, the iron powder of configuration aluminium ingot, chromium powder and surplus, under argon atmosphere after 2000-2200 DEG C of melting 1-3 hour, furnace cooling obtains the aluminium base alloy pig of siderochrome of silicon carbide-containing, rare earth;
3rd step: prepared sizes are at the siderochrome aluminium-based alloyed powder of 1-100um
The broken final vacuum of the aluminium base alloy pig of the siderochrome obtained by second step is milled to the siderochrome aluminium-based alloyed powder that granularity is 1-100um;
4th step: preparation siderochrome aluminum base alloy granular precursor
Get the siderochrome aluminium-based alloyed powder that step 3 obtains, interpolation accounts for the binder of got siderochrome aluminium-based alloyed powder quality 10-30% and stirs, and then, granulation, in 80-120 DEG C of drying, obtains siderochrome aluminum base alloy granular precursor;
5th step: preparation is containing siderochrome aluminum base alloy granular precursor slip
Get binder, siderochrome aluminium-based alloyed powder that step 3 obtains, step 4 obtain siderochrome aluminum base alloy granular precursor and mix, obtain containing siderochrome aluminum base alloy granular precursor slip; The siderochrome aluminium-based alloyed powder that described binder, step 3 obtain, step 4 obtain siderochrome aluminum base alloy granular precursor (30-50) in mass ratio: (10-20): (30-50) joins and get;
6th step: cast molding
Step 5 gained slip is cast to also jolt ramming in mould, then dries at 80-120 DEG C, obtain the aluminium-based porous alloy material presoma of siderochrome;
7th step: sintering
The aluminium-based porous alloy material presoma of siderochrome step 6 obtained is under inert atmosphere or vacuum environment, 600-800 DEG C of insulation is risen to after 0.5-2 hour with 1-3 DEG C/min temperature rise rate, 1200-1400 DEG C is risen to 5-10 DEG C/min temperature rise rate, sintering 0.5-2h, furnace cooling, obtains the aluminium-based porous alloy material of siderochrome.
The preparation method of the aluminium-based porous alloy material of a kind of siderochrome of the present invention, siderochrome aluminum base alloy granular precursor prepared by step 4 is spherical, and particle diameter is 0.5-3.5mm.
The preparation method of the aluminium-based porous alloy material of a kind of siderochrome of the present invention, described in step 4, step 5, binder is made up of dispersion agent and binding agent, and the mass percentage that binding agent accounts for binder is 5-50%; Described binding agent is the one in poly-ethyl acetate, polyethylene butyl ester, polyvinyl alcohol, polyvinyl alcohol, carboxymethyl cellulose, hydroxy propyl cellulose, polyacrylic ester or polyoxyethylene glycol; Described dispersion agent is the one in deionized water, methyl alcohol, ethanol, acetone, normal hexane.
The advantage that the present invention has:
(1) mixing by silicon carbide and rare earth, serves the effect suppressing grain growth under hot environment, greatly enhances the applied at elevated temperature performance of ferrum-chromium-aluminum material;
(2) selected and grain composition by the particle diameter of ferrum-chromium-aluminum granular precursor, the porous metal material of different porosities and pore size can be obtained;
(3) by preparing the particle diameter of the siderochrome aluminium-based alloyed powder of ferrum-chromium-aluminum granular precursor, can make there is abundant micropore in particle, these micropores when macropore is blocked between particle, can proceed the trapping of particulate, thus can reach the object extending the filtration of material life-span;
(4) in cast molding process, by the selection of forming mould, different size and difform multi-porous alloy material can be obtained, and material mainly relies between ferrum-chromium-aluminum granular precursor form metallurgical binding in sintering process, there is mechanical property good, the advantages such as thermal shock resistance is strong;
(5) porous material is mainly and has well corrosion-resistant and alloy phase particle that is antioxidant property, greatly improves the heat transfer property of material, lays a good foundation for the application of this material is extended to the fields such as the heat transfer of extreme environment by filtration;
(5) preparation technology is simple flexibly, and cost is low, is applicable to suitability for industrialized production.
Accompanying drawing explanation
Accompanying drawing 1 is the macro morphology figure that inventive embodiments 1 prepares the aluminium-based porous alloy material of siderochrome;
Accompanying drawing 2 prepares siderochrome aluminium-based porous alloy material surface microscopic appearance figure for the embodiment of the present invention 1;
Accompanying drawing 3a is the microscopic appearance figure before the embodiment of the present invention 1 prepares siderochrome aluminium-based porous alloy material particle junction cold cycling;
Accompanying drawing 3b is the microscopic appearance figure after the embodiment of the present invention 1 prepares siderochrome aluminium-based porous alloy material particle junction cold cycling;
Accompanying drawing 1, accompanying drawing 2 show, and achieve metallurgical binding closely between the aluminium base particle of siderochrome.
Accompanying drawing 3 (a) and Fig. 3 (b) show, and cold cycling does not destroy the bonding state between particle; And find, after circulation experiment, surface mass is mainly aluminum oxide, this also illustrates that this material has good corrosion-resistant and antioxidant property.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described, but the present invention is not limited thereto.
Embodiment 1
Siderochrome aluminium-based porous alloy material constituent mass per-cent prepared by the present embodiment is:
Aluminium 3.75%, chromium 20.25%, silicon carbide 5%, mixed rare earth of lanthanum and cerium 0.038%, surplus is iron.
The preparation method of the aluminium-based porous alloy material of a kind of siderochrome of the present invention, comprises the steps:
The first step: preparation is containing the iron-silicon carbide agglomerate of rare earth
According to the quality proportioning of silicon carbide, rare earth in the aluminium-based porous alloy material of siderochrome of design, by the mass ratio of the silicon carbide after 5 times of scale amplifying, rare earth, take carborundum powder 25kg, mixed rare earth of lanthanum and cerium 0.19kg respectively, mixed powder is mixed to get with 38kg iron powder, after mixed powder vacuum ball milling is mixed for 10 hours, compression moulding, in 1250 DEG C of vacuum sinterings 2 hours, furnace cooling obtained the iron-silicon carbide agglomerate containing rare earth;
Second step: the aluminium base alloy pig of siderochrome preparing silicon carbide-containing, rare earth
According to the quality containing the iron-silicon carbide agglomerate middle-weight rare earths of rare earth, silicon carbide, iron that the first step obtains, by each component proportion of the aluminium-based porous alloy material of siderochrome of design, the iron powder of configuration aluminium ingot, chromium powder and surplus, in 2100 DEG C of meltings after 2 hours under argon atmosphere, furnace cooling obtains the aluminium base alloy pig of siderochrome of silicon carbide-containing, rare earth;
3rd step: prepared sizes are at the siderochrome aluminium-based alloyed powder of 1-2um
The broken final vacuum of the aluminium base alloy pig of the siderochrome obtained by second step is milled to the siderochrome aluminium-based alloyed powder that granularity is 1-2um;
4th step: preparation siderochrome aluminum base alloy granular precursor
Get the siderochrome aluminium-based alloyed powder that step 3 obtains, interpolation accounts for the binder of got siderochrome aluminium-based alloyed powder quality 25% and stirs, then, granulation, particle diameter is 2.5-3.5mm, in 100 DEG C of dryings, obtains siderochrome aluminum base alloy granular precursor;
5th step: preparation is containing siderochrome aluminum base alloy granular precursor slip
Get binder, siderochrome aluminium-based alloyed powder that step 3 obtains, step 4 obtain siderochrome aluminum base alloy granular precursor and mix, obtain containing siderochrome aluminum base alloy granular precursor slip; The siderochrome aluminium-based alloyed powder that described binder, step 3 obtain, step 4 obtain siderochrome aluminum base alloy granular precursor in mass ratio 35:15:50 join and get;
6th step: cast molding
Step 5 gained slip is cast to also jolt ramming in mould, then dries at 100 DEG C, obtain the aluminium-based porous alloy material presoma of siderochrome;
7th step: sintering
The aluminium-based porous alloy material presoma of siderochrome step 6 obtained is under inert atmosphere, rise to 800 DEG C of insulations after 1 hour with 1-3 DEG C/min temperature rise rate, rise to 1250 DEG C with 5-10 DEG C/min temperature rise rate, sintering 1h, furnace cooling, obtains the aluminium-based porous alloy material of siderochrome.
In the present embodiment, described in preparation method's step 4, step 5, binder is made up of dispersion agent and binding agent, and the mass percentage that binding agent accounts for binder is 10%; Described binding agent is poly-ethyl acetate; Described dispersion agent is deionized water.
The present embodiment obtains the aluminium-based porous alloy material of siderochrome, and porosity reaches 40.1%, and its macro morphology and surface microscopic topographic as depicted in figs. 1 and 2, obviously, achieve metallurgical binding closely between the aluminium base particle of siderochrome.
Constant temperature oxidation experiment is adopted to test the high-temperature oxidation resistance of ferrum-chromium-aluminum base porous metal material, and contrast with stainless steel porous material, experiment oxidizing temperature is 800 DEG C, atmosphere is air, in predetermined point of time acquisition quality data, oxidation weight gain rate when finding 10min is 0.132mg/g, oxidation weight gain rate during 60min is 0.418mg/g, oxidation weight gain rate during 120min is 0.732mg/g, be significantly less than the oxidation weight gain rate of stainless steel porous material, illustrate that the ferrum-chromium-aluminum base porous metal material obtained by this embodiment has excellent high temperature oxidation resistance, can be used for filtering that thermal power plant or metallurgical furnace kiln emit containing granule dust flue gas etc.
Ferrum-chromium-aluminum base porous metal material obtained by this embodiment is put into 800 DEG C of vertical tubular rheostat atmosphere furnace, insulation 10min, insert in cold water immediately after taking-up and cool rapidly, to be cooled after room temperature, be reentered into heating and thermal insulation in resistance furnace, reciprocation cycle, to detect the ability that porous metal material adapts to rapid heat cycle environment.Through 100 reciprocation cycle experiments, find that porous metal material can well bear rapid heat cycle environment, and do not ftracture, the phenomenon such as loose, hole is intact, is also still connected closely, does not change due to the change rapidly of envrionment temperature between particle with particle, still can keep metal toughness, mechanical property is still good.Fig. 3 (a) and Fig. 3 (b) are the microscopic appearance figure before and after the cold cycling of siderochrome aluminium-based porous alloy material particle junction, and obviously, cold cycling does not destroy the bonding state between particle; And find, after circulation experiment, surface mass is mainly aluminum oxide, this also illustrates that this material has good corrosion-resistant and antioxidant property.
Embodiment 2
Siderochrome aluminium-based porous alloy material constituent mass per-cent prepared by the present embodiment is:
Aluminium 3.75%, chromium 20.25%, silicon carbide 5%, rare-earth yttrium 0.49%, surplus is iron.
The preparation method of the aluminium-based porous alloy material of a kind of siderochrome of the present invention, comprises the steps:
The first step: preparation is containing the iron-silicon carbide agglomerate of rare earth
According to the quality proportioning of silicon carbide, rare earth in the aluminium-based porous alloy material of siderochrome of design, by the mass ratio of the silicon carbide after 5 times of scale amplifying, rare earth, take carborundum powder 25kg, mixed rare earth of lanthanum and cerium 2.45kg respectively, mixed powder is mixed to get with 42kg iron powder, after mixed powder vacuum ball milling is mixed for 10 hours, compression moulding, in 1300 DEG C of vacuum sinterings 1 hour, furnace cooling obtained the iron-silicon carbide agglomerate containing rare earth;
Second step: the aluminium base alloy pig of siderochrome preparing silicon carbide-containing, rare earth
According to the quality containing the iron-silicon carbide agglomerate middle-weight rare earths of rare earth, silicon carbide, iron that the first step obtains, by each component proportion of the aluminium-based porous alloy material of siderochrome of design, the iron powder of configuration aluminium ingot, chromium powder and surplus, in 2200 DEG C of meltings after 1.5 hours under argon atmosphere, furnace cooling obtains the aluminium base alloy pig of siderochrome of silicon carbide-containing, rare earth;
3rd step: prepared sizes are at the siderochrome aluminium-based alloyed powder of 2-4um
The broken final vacuum of the aluminium base alloy pig of the siderochrome obtained by second step is milled to the siderochrome aluminium-based alloyed powder that granularity is 2-4um;
4th step: preparation siderochrome aluminum base alloy granular precursor
Get the siderochrome aluminium-based alloyed powder that step 3 obtains, interpolation accounts for the binder of got siderochrome aluminium-based alloyed powder quality 30% and stirs, then, granulation, particle diameter is 1.5-2.5mm, in 100 DEG C of dryings, obtains siderochrome aluminum base alloy granular precursor;
5th step: preparation is containing siderochrome aluminum base alloy granular precursor slip
Get binder, siderochrome aluminium-based alloyed powder that step 3 obtains, step 4 obtain siderochrome aluminum base alloy granular precursor and mix, obtain containing siderochrome aluminum base alloy granular precursor slip; The siderochrome aluminium-based alloyed powder that described binder, step 3 obtain, step 4 obtain siderochrome aluminum base alloy granular precursor in mass ratio 35:15:50 join and get;
6th step: cast molding
Step 5 gained slip is cast to also ultrasonic wave jolt ramming in mould, then dries at 100 DEG C, obtain the aluminium-based porous alloy material presoma of siderochrome;
7th step: sintering
The aluminium-based porous alloy material presoma of siderochrome step 6 obtained is under inert atmosphere, rise to 800 DEG C of insulations after 1 hour with 1-3 DEG C/min temperature rise rate, rise to 1250 DEG C with 5-10 DEG C/min temperature rise rate, sintering 1h, furnace cooling, obtains the aluminium-based porous alloy material of siderochrome.
In the present embodiment, described in preparation method's step 4, step 5, binder is made up of dispersion agent and binding agent, and the mass percentage that binding agent accounts for binder is 10%; Described binding agent is polyvinyl alcohol; Described dispersion agent is ethanol.
The present embodiment obtains the aluminium-based porous alloy material of siderochrome, and porosity reaches 43.6%.
Corrosion weight loss method is adopted to observe the erosion resistance of sample, and contrast with stainless steel porous material, sintered sample is put into the beaker that 3.5%NaCl solution is housed, in such circumstances sample is soaked 72 hours, middle gradation calculates corrosion weight loss, corrosion weight loss rate when finding 24h is 4.52mg/g, corrosion weight loss rate during 48h is 5.07mg/g, corrosion weight loss rate during 72h is 5.58mg/g, lower than the corrosion weight loss rate of a stainless steel porous material order of magnitude, illustrate that the ferrum-chromium-aluminum base porous metal material obtained by this embodiment has excellent corrosion resistance nature, can be used for filtering various pyrometallurgy fluids etc.
Ferrum-chromium-aluminum base porous metal material obtained by this embodiment is put into 800 DEG C of vertical tubular rheostat atmosphere furnace, insulation 10min, insert in cold water immediately after taking-up and cool rapidly, to be cooled after room temperature, be reentered into heating and thermal insulation in resistance furnace, reciprocation cycle, to detect the ability that porous metal material adapts to rapid heat cycle environment.Through 100 reciprocation cycle experiments, find that porous metal material can well bear rapid heat cycle environment, and do not ftracture, the phenomenon such as loose, hole is intact, is also still connected closely, does not change due to the change rapidly of envrionment temperature between particle with particle, still can keep metal toughness, mechanical property is still good.
Embodiment 3
Siderochrome aluminium-based porous alloy material constituent mass per-cent prepared by the present embodiment is:
Aluminium 5.46%, chromium 19.58%, silicon carbide 5%, mixed rare earth of lanthanum and cerium 0.038%, surplus is iron.
The preparation method of the aluminium-based porous alloy material of a kind of siderochrome of the present invention, comprises the steps:
The first step: preparation is containing the iron-silicon carbide agglomerate of rare earth
According to the quality proportioning of silicon carbide, rare earth in the aluminium-based porous alloy material of siderochrome of design, by the mass ratio of the silicon carbide after 5 times of scale amplifying, rare earth, take carborundum powder 25kg, mixed rare earth of lanthanum and cerium 0.19kg respectively, mixed powder is mixed to get with 38kg iron powder, after mixed powder vacuum ball milling is mixed for 10 hours, compression moulding, in 1250 DEG C of vacuum sinterings 2 hours, furnace cooling obtained the iron-silicon carbide agglomerate containing rare earth;
Second step: the aluminium base alloy pig of siderochrome preparing silicon carbide-containing, rare earth
According to the quality containing the iron-silicon carbide agglomerate middle-weight rare earths of rare earth, silicon carbide, iron that the first step obtains, by each component proportion of the aluminium-based porous alloy material of siderochrome of design, the iron powder of configuration aluminium ingot, chromium powder and surplus, in 2100 DEG C of meltings after 1.5 hours under vacuum condition, furnace cooling obtains the aluminium base alloy pig of siderochrome of silicon carbide-containing, rare earth;
3rd step: prepared sizes are at the siderochrome aluminium-based alloyed powder of 15-20um
The broken final vacuum of the aluminium base alloy pig of the siderochrome obtained by second step is milled to the siderochrome aluminium-based alloyed powder that granularity is 15-20um;
4th step: preparation siderochrome aluminum base alloy granular precursor
Get the siderochrome aluminium-based alloyed powder that step 3 obtains, interpolation accounts for the binder of got siderochrome aluminium-based alloyed powder quality 20% and stirs, then, granulation, particle diameter is 1.5-2.5mm, in 100 DEG C of dryings, obtains siderochrome aluminum base alloy granular precursor;
5th step: preparation is containing siderochrome aluminum base alloy granular precursor slip
Get binder, siderochrome aluminium-based alloyed powder that step 3 obtains, step 4 obtain siderochrome aluminum base alloy granular precursor and mix, obtain containing siderochrome aluminum base alloy granular precursor slip; The siderochrome aluminium-based alloyed powder that described binder, step 3 obtain, step 4 obtain siderochrome aluminum base alloy granular precursor in mass ratio 40:10:50 join and get;
6th step: cast molding
Step 5 gained slip is cast to also ultrasonic wave jolt ramming in mould, then dries at 100 DEG C, obtain the aluminium-based porous alloy material presoma of siderochrome;
7th step: sintering
The aluminium-based porous alloy material presoma of siderochrome step 6 obtained is under inert atmosphere, rise to 800 DEG C of insulations after 1 hour with 1-3 DEG C/min temperature rise rate, rise to 1250 DEG C with 5-10 DEG C/min temperature rise rate, sintering 1h, furnace cooling, obtains the aluminium-based porous alloy material of siderochrome.
In the present embodiment, described in preparation method's step 4, step 5, binder is made up of dispersion agent and binding agent, and the mass percentage that binding agent accounts for binder is 20%; Described binding agent is hydroxy propyl cellulose; Described dispersion agent is acetone.
The present embodiment obtains the aluminium-based porous alloy material of siderochrome, and porosity reaches 45.2%.
Ferrum-chromium-aluminum base porous metal material obtained by this embodiment is put into 800 DEG C of vertical tubular rheostat atmosphere furnace, insulation 10min, insert in cold water immediately after taking-up and cool rapidly, to be cooled after room temperature, be reentered into heating and thermal insulation in resistance furnace, reciprocation cycle, to detect the ability that porous metal material adapts to rapid heat cycle environment.Through 100 reciprocation cycle experiments, find that porous metal material can well bear rapid heat cycle environment, and do not ftracture, the phenomenon such as loose, hole is intact, is also still connected closely, does not change due to the change rapidly of envrionment temperature between particle with particle, still can keep metal toughness, mechanical property is still good.
Claims (10)
1. the aluminium-based porous alloy material of siderochrome, comprises following component, forms by mass percentage:
Aluminium 3-7,
Chromium 15-25,
Silicon carbide 2-10,
Rare earth 0.03-0.5, surplus is iron.
2. the aluminium-based porous alloy material of a kind of siderochrome according to claim 1, is characterized in that: described rare earth is mixed rare earth of lanthanum and cerium or rare-earth yttrium.
3. the aluminium-based porous alloy material of a kind of siderochrome according to claim 2, it is characterized in that: the ferrum-chromium-aluminum base alloy material particle that described multi-porous alloy material is 0.5-3.5mm by diameter is consisted of metallurgical binding, selected and grain composition by ferrum-chromium-aluminum base alloy material grain diameter, realize the adjustment of multi-porous alloy material porosity and pore size.
4. the preparation method of the aluminium-based porous alloy material of a kind of siderochrome according to claim 3, comprises the steps:
The first step: preparation is containing the iron-silicon carbide agglomerate of rare earth
According to the quality proportioning of silicon carbide, rare earth in the aluminium-based porous alloy material of siderochrome of design, by the mass ratio of the silicon carbide after amplification in proportion, rare earth, take carborundum powder, rare earth respectively, mixed powder is mixed to get with iron powder, after mixed powder vacuum ball milling is mixed, compression moulding, in 1200-1300 DEG C of vacuum sintering, furnace cooling obtains the iron-silicon carbide agglomerate containing rare earth;
Second step: the aluminium base alloy pig of siderochrome preparing silicon carbide-containing, rare earth
According to the quality containing the iron-silicon carbide agglomerate middle-weight rare earths of rare earth, silicon carbide, iron that the first step obtains, by each component proportion of the aluminium-based porous alloy material of siderochrome of design, the iron powder of configuration aluminium ingot, chromium powder and surplus, in 2000-2200 DEG C of melting under argon atmosphere, furnace cooling obtains the aluminium base alloy pig of siderochrome of silicon carbide-containing, rare earth;
3rd step: prepared sizes are at the siderochrome aluminium-based alloyed powder of 1-100um
The broken final vacuum of the aluminium base alloy pig of the siderochrome obtained by second step is milled to the siderochrome aluminium-based alloyed powder that granularity is 1-100um;
4th step: preparation siderochrome aluminum base alloy granular precursor
Get the siderochrome aluminium-based alloyed powder that step 3 obtains, interpolation accounts for the binder of got siderochrome aluminium-based alloyed powder quality 10-30% and stirs, and then, granulation, in 80-120 DEG C of drying, obtains siderochrome aluminum base alloy granular precursor;
5th step: preparation is containing siderochrome aluminum base alloy granular precursor slip
Get binder, siderochrome aluminium-based alloyed powder that step 3 obtains, step 4 obtain siderochrome aluminum base alloy granular precursor and mix, obtain containing siderochrome aluminum base alloy granular precursor slip;
6th step: cast molding
Step 5 gained slip is cast to also jolt ramming in mould, then dries at 80-120 DEG C, obtain the aluminium-based porous alloy material presoma of siderochrome;
7th step: sintering
The aluminium-based porous alloy material presoma of siderochrome step 6 obtained is under inert atmosphere or vacuum environment, 600-800 DEG C of insulation is risen to after 0.5-2 hour with 1-3 DEG C/min temperature rise rate, 1200-1400 DEG C is risen to 5-10 DEG C/min temperature rise rate, sintering 0.5-2h, furnace cooling, obtains the aluminium-based porous alloy material of siderochrome.
5. the preparation method of the aluminium-based porous alloy material of a kind of siderochrome according to claim 4, is characterized in that: in step one, in 1200-1300 DEG C of vacuum sintering 1-3 hour.
6. the preparation method of the aluminium-based porous alloy material of a kind of siderochrome according to claim 4, is characterized in that: in step 2, in 2000-2200 DEG C of melting 1-3 hour.
7. the preparation method of the aluminium-based porous alloy material of a kind of siderochrome according to claim 4, is characterized in that: siderochrome aluminum base alloy granular precursor prepared by step 4 is spherical, and particle diameter is 0.5-3.5mm.
8. the preparation method of the aluminium-based porous alloy material of a kind of siderochrome according to claim 4, is characterized in that: described in step 4, step 5, binder is made up of dispersion agent and binding agent, and the mass percentage that binding agent accounts for binder is 5-50%.
9. the preparation method of the aluminium-based porous alloy material of a kind of siderochrome according to claim 8, is characterized in that: described binding agent is the one in poly-ethyl acetate, polyethylene butyl ester, polyvinyl alcohol, polyvinyl alcohol, carboxymethyl cellulose, hydroxy propyl cellulose, polyacrylic ester or polyoxyethylene glycol; Described dispersion agent is the one in deionized water, methyl alcohol, ethanol, acetone, normal hexane.
10. the preparation method of the aluminium-based porous alloy material of a kind of siderochrome according to claim 4, it is characterized in that: in step 5, containing in siderochrome aluminum base alloy granular precursor slip, the siderochrome aluminium-based alloyed powder that binder, step 3 obtain, step 4 obtain siderochrome aluminum base alloy granular precursor (30-50) in mass ratio: (10-20): (30-50) joins and get.
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| CN104630635A (en) * | 2015-03-05 | 2015-05-20 | 北京矿迪科技有限公司 | Iron-chromium-aluminum-based porous metal material and preparation method thereof |
| CN105464766A (en) * | 2016-01-25 | 2016-04-06 | 夏哲 | Method for manufacturing electric heating metal carrier |
| CN105937013A (en) * | 2016-05-31 | 2016-09-14 | 同济大学 | Metallurgical powder for high-performance automobile oil pump precise gears and gear preparation method |
| CN106591619A (en) * | 2016-04-25 | 2017-04-26 | 北京纳米能源与系统研究所 | Double-mode porous copper and preparation method and application thereof |
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| CN105464766A (en) * | 2016-01-25 | 2016-04-06 | 夏哲 | Method for manufacturing electric heating metal carrier |
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