CN101396739A - Preparation method of iron powder special for metalized product surface spray-embedding technique - Google Patents
Preparation method of iron powder special for metalized product surface spray-embedding technique Download PDFInfo
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- CN101396739A CN101396739A CNA2008100795094A CN200810079509A CN101396739A CN 101396739 A CN101396739 A CN 101396739A CN A2008100795094 A CNA2008100795094 A CN A2008100795094A CN 200810079509 A CN200810079509 A CN 200810079509A CN 101396739 A CN101396739 A CN 101396739A
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Abstract
The invention relates to a method for preparing metal nano powder, in particular to a method for preparing iron powder specially used for the surface spray-embedding technology of a metal object, which solves the problem existed in the prior art that the shape of the iron powder grain used for spraying and embedding metal surfaces is not ideal. The method comprises the following steps: under the conditions that the temperature is from -5 to 5 DEG C, and the high-frequency cutting time is set as 6,000 to 6,500 times per minute, raw materials are processed into nano iron powder, and the shape of the powder grain is in sphere ; powder materials where the grains with the following meshes are respectively selected, wherein, the D3 of the grain is equal to 21nm, the D25 is equal to 32.5nm, the D50 is equal to 50nm, the D75 is equal to 63.2nm, and the D97 is equal to 77.3nm; then, 2-3nm thickness of anti-oxidation coating is continually carried out on the grains of the iron powder by a 'DQ coating method'. Besides, grinding treatment is carried out on the surface of the coated powder grain. The iron powder prepared according to the method has the advantages of favorable performance and good effect.
Description
Technical field
The present invention relates to a kind of preparation method of metal nano powder, be specially a kind of preparation method of iron powder special for metalized product surface spray-embedding technique.
Background technology
The metal nano powder material sprays embedding in the metal surface be present a kind of ten minutes frontier science and technology technology in the world.The advantage of spray-embedding technique is, the monomer particle of metal nano powder material can be effectively and firm the combining of metallics, forms unique metal surface protection layer.Compare with technologies such as other spraying, injections, have precision height, even tissue, excellent performance, low, the metal powder material saving 81.31% of cost.
Its product is widely used in industrial circles such as Aero-Space, national defense industry, Electronics and Information Engineering, biologic medical apparatus, automobile, machinery, five metals, sports apparatus, timepiece industry, weapon industry.Therefore, the development that generally believes this technology in the world will cause the industrialization overlay coating, be coated with combine together the new shape technology of development of course industrialization.
The subject matter of the world and domestic spray-embedding technique existence at present is: not having perfect metal nano powder material spray-embedding technique, its reason in the world substantially at present mainly is that the shape problem of metal nano powder material granule solves bad always.Because what at present spray-embedding technique used in the world almost all is inequilateral sheet, dendroid, metal nano powder material such as fibrous, the requirement that does not almost reach spray-embedding technique in actual use.U.S. B-2A stealth bomber for example, when just equipping our troops, the maintenance task all is that the technical staff by each major company finishes basically, 1 hour maintenance time of every flight is 132 hours.After each aerial mission was finished, high velocity air all can cause wearing and tearing to the body top layer.The unlikely decline of stealthy performance in order to ensure aircraft, after each flight, the technical staff will rebuild the radar absorbing on B-2A top layer with the method for spray-embedding technique, and newly spray the absorbing material of embedding because grain shape undesirable causes the overlapping wave-sucking performance that weakens aircraft of finite sum spray embedding in service life.Owing to lack desirable metal nano powder sphere material, so B-2A base deployment in overseas always, this is for the septic yanks that fight with global deployment, and this is an intolerable shortcoming.Since although B-2A equips our troops, U.S. army once repeatedly made by force in overseas, and B-2A never appears at the battlefield.U.S. latest model stealth fighter F-22A exists the problem of B-2A equally at present.
Number of patent application is 2006100481685 to have put down in writing a kind of cutting production technology of metal nanometer powder zero boundry particle, a kind of brand-new zero boundry particle cutting metal nano-powder material technology has been put down in writing in this patent application, with the iron powder is example, step comprises, iron powder is placed under-10 ℃～+ 15 ℃ the processing temperature state, then ferrous powder granules is carried out high-speed cutting, per minute is controlled at 5000～6000 times, then the ferrous powder granules after the cutting 6000 rev/mins high frequency is ground, carry out the physics reduction again, the surface coats handles, and last classification and sorting can obtain product.This technology can process the iron powder of different Nano grades, the iron powder that utilizes this method to produce specific particle diameter has the excellent specific property that conventional art can't be produced, and discovering through the inventor, in this technology, improve or reduce nanometer iron powder or other metal powder that processing " cutting " frequency is also correspondingly adjusted each different stage of producing after " processing temperature ", and characteristic has tangible difference, through being widely used in different industries or field after classification and sorting and the proportioning.The technical scheme that this patent application is put down in writing is the applicant has proposed " cutting " this processing first in nano metal powder materials processing technology field a notion, utilize the relative high speed between the abrasive media back and forth to collide and rub and the feed metal powder can be machined to Nano grade, and the reciprocating number of times of the high speed of this abrasive media in the unit interval can be called " frequency ", and its crushing process to raw material can be described as " cutting "; And proposed concrete machined parameters, and just can process this technical scheme of high-quality nanometer iron powder by having facts have proved by setting corresponding " cutting " frequency and controlling corresponding processing temperature.
Number of patent application is 2006101620469 to disclose little, the nano particle cladding process of a kind of metal; the technical scheme of this application can form the high-quality protection against oxidation layer that a layer thickness is 1nm-3nm on the surface of metal powder material, hereinafter referred to as " DQ coats method ".Think the cladding process of more traditional nano metal powder, this technical scheme clad ratio is higher, and anti oxidation time is longer.
Summary of the invention
The preparation method that the present invention provides a kind of iron powder special for metalized product surface spray-embedding technique in order to solve the metal surface that exists in the prior art and to spray the dissatisfactory problem of ferrous powder granules shape that embedding uses.
The present invention is realized by following technical scheme, a kind of preparation method of iron powder special for metalized product surface spray-embedding technique, may further comprise the steps: at-5 ℃---under 5 ℃ the condition, high frequency cutting number of times is set in per minute 6000 times---under 6500 times the situation raw material is processed into the nanometer iron powder that powder granule is shaped as spheroid, sub-elect the powder body material of the distribution of particles of D3=21nm D25=32.5nm D50=50nm D75=63.2nm D97=77.3nm more respectively, then, using " DQ coats method " that ferrous powder granules is continued thickness again is the anti-oxidation coating of 2nm-3nm, and the powder granule surface grinding after coating is handled.
The technology of the present invention advantage
1, the technology of the present invention advantage one is; Shortcomings such as the life-span of spray-embedding technique is short in the world at present, cost is high, the spray embedding is overlapping, wave-absorbing effect difference have thoroughly been changed.
2, the technology of the present invention advantage two is; Thoroughly changed the melting property of parent of spraying embedding nano-powder material and metal surface at present in the world, form metal nano powder material granule 2/3 and embedded the metal surface, form effectively the parent and melted integraty, solved metal object coming off and etching problem in high-speed cruising and in the permanent friction and in the adverse circumstances corrosion.
3, the technology of the present invention advantage three is; The metal nano powder material uses few, and cost is low.Data shows that the B-2A stealth bomber surface area of the U.S. is that 300 square metres, F-22A stealth fighter surface area are 35 square metres, and using the consumption of the every square meter metal nano powder of spray-embedding technique material is 97g.If use the spray embedding use amount of every square metre of the technology of the present invention to have only 2g, be the U.S. spray the embedding use amount at present 1/49.
4, the technology of the present invention advantage four is; Durability is in the world particularly 37 of the U.S. times at present.The particle that the metal nano powder material of embedding use is sprayed at present in the U.S. is dendroid basically; spray is embedded in the degree of depth of aircraft metal surface and has only about 1/10 of powder granule relative diameter; at 2 Mach; spray embedding powder granule expulsion rate under the 1h current intelligence is 42%; the technology of the present invention is at 2 Mach, and the spray embedding powder granule expulsion rate under 1h (wind-tunnel) current intelligence is 1.13%.
5, the technology of the present invention advantage five is; With the suction ripple rate of amount under the unit are be at present in the world particularly the U.S. can't compare.For example, the spray-embedding technique of the U.S. on state-of-the art in the world stealth fighter F-22A at present, according to 35 square metres of amount unit ares, spray engaged column nano-powder material particle.
The specific embodiment
Embodiment 1: a kind of preparation method of iron powder special for metalized product surface spray-embedding technique, may further comprise the steps: (concrete processing method referenced patent application number is the cutting production technology of metal nanometer powder zero boundry particle of 2006100481685 records,) under-5 ℃ condition, high frequency cutting number of times is set under the situation of per minute 6500 times and produces, processing powder grain shape is the nanometer iron powder of the special-purpose spray-embedding technique of spheroid, sub-elect the powder body material of the distribution of particles of (50nm is an example) D3=21nm D25=32.5nm D50=50nm D75=63.2nm D97=77.3nm more respectively, then, using " DQ coats method " that ferrous powder granules is continued thickness again is the anti-oxidation coating of 2nm-3nm, its anti-oxidization time was reached more than 90 hours, powder body material after coating is input to the surface grinding of carrying out powder granule in the high-speed grinder handles, it is smooth to make it reach the powder granule material surface, spheroid is perfectly round.
Embodiment 2: a kind of preparation method of iron powder special for metalized product surface spray-embedding technique, may further comprise the steps: under 5 ℃ condition, high frequency cutting number of times is set under the situation of per minute 6000 times and produces, processing powder grain shape is the nanometer iron powder of the special-purpose spray-embedding technique of spheroid, sub-elect the powder body material of the distribution of particles of (50nm is an example) D3=21nm D25=32.5nm D50=50nm D75=63.2nm D97=77.3nm more respectively, then, using " DQ coats method " that ferrous powder granules is continued thickness again is the anti-oxidation coating of 2nm-3nm, its anti-oxidization time was reached more than 90 hours, the powder body material after coating is input to the surface grinding of carrying out powder granule in the high-speed grinder handles.
Embodiment 3: a kind of preparation method of iron powder special for metalized product surface spray-embedding technique, may further comprise the steps: under 0 ℃ condition, high frequency cutting number of times is set under the situation of per minute 6250 times and produces, processing powder grain shape is the nanometer iron powder of the special-purpose spray-embedding technique of spheroid, sub-elect the powder body material of the distribution of particles of (50nm is an example) D3=21nm D25=32.5nm D50=50nm D75=63.2nm D97=77.3nm more respectively, then, using " DQ coats method " that ferrous powder granules is continued thickness again is the anti-oxidation coating of 2nm-3nm, its anti-oxidization time was reached more than 90 hours, the powder body material after coating is input to the surface grinding of carrying out powder granule in the high-speed grinder handles.
Claims (1)
1, a kind of preparation method of iron powder special for metalized product surface spray-embedding technique, it is characterized in that: may further comprise the steps: at-5 ℃---under 5 ℃ the condition, high frequency cutting number of times is set in per minute 6000 times---under 6500 times the situation raw material is processed into the nanometer iron powder that powder granule is shaped as spheroid, sub-elect the powder body material of the distribution of particles of D3=21nm D25=32.5nm D50=50nm D75=63.2nm D97=77.3nm more respectively, then using " DQ coats method " that ferrous powder granules is continued thickness again is the anti-oxidation coating of 2nm-3nm, and the powder granule surface grinding after coating is handled.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100795094A CN101396739A (en) | 2008-09-30 | 2008-09-30 | Preparation method of iron powder special for metalized product surface spray-embedding technique |
| CN2009101797015A CN101758226B (en) | 2008-09-30 | 2009-09-28 | Preparation method of special iron powder for metal object surface spraying and embedding technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100795094A CN101396739A (en) | 2008-09-30 | 2008-09-30 | Preparation method of iron powder special for metalized product surface spray-embedding technique |
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| Publication Number | Publication Date |
|---|---|
| CN101396739A true CN101396739A (en) | 2009-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100795094A Pending CN101396739A (en) | 2008-09-30 | 2008-09-30 | Preparation method of iron powder special for metalized product surface spray-embedding technique |
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| CN (1) | CN101396739A (en) |
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- 2008-09-30 CN CNA2008100795094A patent/CN101396739A/en active Pending
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Application publication date: 20090401 |