CN101481597A - Normal atmosphere sintering method for magnetic grinding medium - Google Patents
Normal atmosphere sintering method for magnetic grinding medium Download PDFInfo
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- CN101481597A CN101481597A CNA2009100139441A CN200910013944A CN101481597A CN 101481597 A CN101481597 A CN 101481597A CN A2009100139441 A CNA2009100139441 A CN A2009100139441A CN 200910013944 A CN200910013944 A CN 200910013944A CN 101481597 A CN101481597 A CN 101481597A
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- magnetic abrasive
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Abstract
The invention provides a normal-pressure sintering method of a magnetic grinding medium, comprising the following steps: 1) coating inorganic films on the surfaces of ferromagnetic phases by adopting the sol-gal process; 2) loading the ferromagnetic phases with coated surfaces, grinding medium phases and high-temperature binder into a mixer for full mixing; 3) pressing the mixed powder into a green body which is then dried; 4) placing the dried green body in an electric furnace for undergoing normal-pressure sintering; and 5) crashing the sintered green body, and obtaining the magnetic grinding medium after sieving. In the method, on the basis of the sintering method, the high-temperature inorganic binder is used for replacing noble metal bonding components such as titanium, molybdenum, nickel, cobalt, and the like; and by coating the inorganic films on the surfaces of the ferromagnetic phases through the sol-gal process, the method reduces the degree of oxidation of the ferromagnetic phases at a high temperature, improves the compatibility of the ferromagnetic phases with the grinding medium phases, and enhances the binding force between the ferromagnetic phases and the grinding medium phases; the obtained magnetic grinding medium has strong binding strength and high grinding efficiency and is sintered by a normal-pressure atmosphere-free protective electric furnace; and the process is simple so as to be favorable for batch production.
Description
Technical field
The invention provides a kind of normal atmosphere sintering method of magnetic abrasive, belong to the preparing technical field of matrix material.
Background technology
From the materialogy angle, magnetic abrasive is a kind of matrix material, i.e. iron-based enhanced type composite material is mainly by ferromagnetic phase and abrasive particle phase composite.The ferromagnetic requirement mutually has good magnetic diffusivity and electroconductibility, and common used material is straight iron powder or iron(-)base powder.Abrasive particle is a kind of particulate matter with higher hardness, intensity and stability that has grinding, grinding and polishing action concurrently mutually, and common used material has corundum, diamond, silicon nitride, silicon carbide etc.The chemical ingredients of magnetic abrasive and proportioning thereof and structure are the key factors of decision magnetic abrasive performance, and this just requires ferromagnetic and abrasive particle to keep combination closely between mutually, and suitable granularity will be arranged, and also needs a kind of appropriate preparation method.
The sintering method of magnetic abrasive mainly contains laser sintered method and hot pressing sintering method at present.Wherein laser sintered method is to adopt iron powder to add conventional abrasive material (Al
2O
3, SiC), by heating, fusing, the magnetic abrasive grain that physical and chemical process is prepared into certain size such as mix, heavily coagulate.This method is simple, and the magnetic abrasive grain size of making is suitable.Shortcoming is that the easy oxidation of magnetic abrasive grain, tissue looseness, the density made are low, and abrasive particle phase particle easily peels off.Hot pressing sintering method mainly is to be 1200 ℃ in sintering temperature, sintering time 5.5h, and soaking time 2h makes wedding agent with titanium valve, molybdenum powder, and hot pressed sintering prepares gained.This method shortcoming is that the temperature survey accuracy is relatively poor in the hot pressing, and it is bigger that non-uniform temperature, final quality are influenced by the original degree of oxidation of powder often, and is also relevant with accuracy, grinding tool dimensional stability and the pressure of loading weight.And system the sample piece is broken difficult, need line dicing, slivering broken again, be difficult to produce in batches.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can overcome above-mentioned defective, manufacturing process are simple, sintering goes out magnetic abrasive bonding strength and mill efficiency is all more satisfactory, help realizing the normal atmosphere sintering method of the magnetic abrasive produced in batches.Its technical scheme is:
A kind of normal atmosphere sintering method of magnetic abrasive, it is characterized in that may further comprise the steps: 1) use sol-gel method at ferromagnetic phase surface coated inorganic film, 2) with the ferromagnetic and abrasive particle behind the surperficial coated inorganic film mutually, the high-temperature agglomerant thorough mixing in the blender of packing into, 3) above-mentioned mixed pressed by powder is become base substrate and dry, 4) it is normal pressure-sintered dried base substrate to be put into electric furnace, and 5) burned base substrate fragmentation, screening are promptly got magnetic abrasive.
For realizing goal of the invention, the normal atmosphere sintering method of described magnetic abrasive, ferromagnetic coordinating is divided into straight iron powder or iron(-)base powder in the step 1), the content of iron is not less than 70% in the iron(-)base powder, adopts sol-gel processing to coat silicon oxide, aluminum oxide, pure aluminium silicate or aluminum phosphate mineral membrane at ferromagnetic phase surface.
For realizing goal of the invention, the normal atmosphere sintering method of described magnetic abrasive, step 2) abrasive particle adopts the higher and attrition resistant lapis amiridis of hardness, silicon carbide, boron nitride or zirconium white mutually in, high-temperature agglomerant is selected the inorganic mineralizer that contains O, B, Si, C and P for use, and the ferromagnetic and abrasive particle of surface-coating mutually, high-temperature agglomerant three's mass ratio is 1～8.5:8.5～0.5:0.5～1.
For realizing goal of the invention, the normal atmosphere sintering method of described magnetic abrasive, in the powder that mixes, add massfraction in the step 3) and be 5% PVA solution and make wedding agent, add-on is 1～3% of a mixed powder total mass, stir, under 50～100MPa, be pressed into base substrate then, with base substrate dry 5h under 100 ℃.
For realizing goal of the invention, the normal atmosphere sintering method of described magnetic abrasive is put into electric furnace with dried base substrate in the step 4) and is carried out sintering at 850～1300 ℃, sintering time 4～12h, cooling naturally.
For realizing goal of the invention, the normal atmosphere sintering method of described magnetic abrasive carries out fragmentation with burned base substrate in the step 5), and screening promptly gets magnetic abrasive then.
Its principle of work is: the present invention is on the basis of sintering process, use the high-temperature inorganic adhesive instead of titanium, molybdenum, nickel, noble metal adhesion components such as cobalt, and by sol-gel method to ferromagnetic phase surface bag silicon fiml, reduced the degree of oxidation of ferromagnetic phase under the high temperature, ferromagnetic and abrasive particle consistency have mutually been improved, form the glassy phase component behind the mineralizer high temperature sintering, both improved the linkage force between ferromagnetic phase and the abrasive particle phase, shattering process is easier than using metal adhesive, particle integrity is good after the hammering fragmentation, basic flawless, the magnetic abrasive bonding strength and the mill efficiency that make are all more satisfactory, help mass production.
The present invention compared with prior art has following advantage:
1, replaces cobalt, molybdenum noble metal component with mineral binder bond, cost is low, and because the wedding agent of magnetic abrasive is the mineralizer component of unorganic glass phase, the bonding strength height, fragility is arranged, mode with the hammering fragmentation can be finished, and therefore helps realizing producing in batches;
2, adopt sol-gel method to ferromagnetic phase surface coated inorganic film, improved ferromagnetic and abrasive particle consistency mutually, improved ferromagnetic phase and the abrasive particle linkage force between mutually, it is good by its magnetic abrasive durability height, long service life, nonferromagnetic substance that makes to make;
3, prepare magnetic abrasive under the condition of no atmosphere protection, manufacturing process is simple, is easy to form scale production.
Embodiment
Embodiment 1:
Adopt sol-gel processing, 200 order reduced iron powders are put into the gel that forms after the teos hydrolysis polycondensation, the press filtration after drying forms the surface and is surrounded by SiO
2The reduced iron powder of film.With 80 parts of quality 200 orders through coated Si O
2325 order brown alundum powders of the reduced iron powder of film and 20 parts of quality, 10 parts of inorganic mineralizer uniform mixing of quality 200 orders, in the powder that mixes, add massfraction and be 5% PVA solution and make wedding agent, add-on is 1.5% of a mixed powder total mass, stir, under 80MPa, be pressed into base substrate then, with base substrate dry 5h under 100 ℃.It is normal pressure-sintered to put into electric furnace behind the body drying, and 930 ℃ of sintering temperatures heated 4 hours, were incubated 2 hours, and the cooling back is broken naturally, is filtered into 40 orders, 60 orders, 80 orders and 120 purpose magnetic abrasive particles, and the total recovery of four kinds of granularities is 80%.
Embodiment 2:
Adopt sol-gel processing, the aluminium colloidal sol of teos hydrolysis polycondensation product silicon sol and aluminum isopropylate preparation is mixed, leave standstill stable after, with 200 order iron-aluminium-silicon (W% aluminium 5.4%, silicon 9.6%, all the other are iron) alloy powder immerses in the mixed sols, the press filtration after drying, form iron-Al alloy powder that the surface is surrounded by the pure aluminium silicate film, with the iron-aluminum-silicon alloy powder of 80 parts of quality, 200 order coatings and 325 order silicon nitride powders of 20 parts of quality, the inorganic mineralizer uniform mixing of 200 orders of 7 parts of quality is pressed into base substrate under 90Mpa, it is normal pressure-sintered to put into electric furnace behind the body drying, 1000 ℃ of sintering temperatures, heated 4 hours, and be incubated 1.5 hours, the cooling back is broken naturally, be filtered into 40 orders, 60 orders, 80 orders and 120 purpose magnetic abrasive particles, the total recovery of four kinds of granularities is 83%.
Embodiment 3:
In water glass solution, add dilute sulphuric acid, generate the silicon gel, after aging, add alum liquor, add ammoniacal liquor again and make precipitation agent, generate silica-alumina gel, after still aging, adopt sol-gel processing, at the surperficial coated Si O of 200 order iron-nickel-molybdenum powder (W% nickel: molybdenum 25%: 2%, surplus is an iron)
2Film is with 80 parts of quality, 200 order coated Si O
2The nickel powder of film and 20 parts of quality 400 order white alundum powders, 10 parts of inorganic mineralizer uniform mixing of quality 200 orders, under 100Mpa, be pressed into base substrate, it is normal pressure-sintered to put into electric furnace behind the body drying, 1200 ℃ of sintering temperatures, heated 4 hours, and be incubated 2 hours, the cooling back is broken naturally, be filtered into 40 orders, 60 orders, 80 orders and 120 purpose magnetic abrasive particles, the total recovery of four kinds of granularities is 80%.
Embodiment 4:
Adopt sol-gel processing, the hydrolysis condensation reaction that utilizes tetraethoxy is at 200 order atomized iron powders surface coated Si O
2Film is with 80 parts of quality, 200 order coated Si O
2The atomized iron powder of film and 20 parts of quality 400 order carborundum powders, 10 parts of inorganic mineralizer uniform mixing of quality 200 orders, under 100Mpa, be pressed into base substrate, it is normal pressure-sintered to put into electric furnace behind the body drying, 850 ℃ of sintering temperatures, heated 4 hours, and be incubated 1.5 hours, the cooling back is broken naturally, be filtered into 40 orders, 60 orders, 80 orders and 120 purpose magnetic abrasive particles, the total recovery of four kinds of granularities is 78%.
Claims (6)
1, a kind of normal atmosphere sintering method of magnetic abrasive, it is characterized in that may further comprise the steps: 1) use sol-gel method at ferromagnetic phase surface coated inorganic film, 2) with the ferromagnetic and abrasive particle behind the surperficial coated inorganic film mutually, the high-temperature agglomerant thorough mixing in the blender of packing into, 3) above-mentioned mixed pressed by powder is become base substrate and dry, 4) it is normal pressure-sintered dried base substrate to be put into electric furnace, and 5) burned base substrate fragmentation, screening are promptly got magnetic abrasive.
2, the normal atmosphere sintering method of magnetic abrasive as claimed in claim 1, it is characterized in that: ferromagnetic the coordinating of step 1) is divided into straight iron powder or iron(-)base powder, the content of iron is not less than 70% in the iron(-)base powder, adopts sol-gel processing to coat silicon oxide, aluminum oxide, pure aluminium silicate or aluminum phosphate mineral membrane at ferromagnetic phase surface.
3, the normal atmosphere sintering method of magnetic abrasive as claimed in claim 1, it is characterized in that: abrasive particle adopts the higher and attrition resistant lapis amiridis of hardness, silicon carbide, boron nitride or zirconium white mutually in the step 1), high-temperature agglomerant is selected the inorganic mineralizer that contains O, B, Si, C and P for use, and the ferromagnetic and abrasive particle of surface-coating mutually, high-temperature agglomerant three's mass ratio is 1～8.5:8.5～0.5:0.5～1.
4, the normal atmosphere sintering method of magnetic abrasive as claimed in claim 1, it is characterized in that: in the powder that mixes, add massfraction in the step 3) and be 5% PVA solution and make wedding agent, add-on is 1～3% of a mixed powder total mass, stir, under 50～100MPa, be pressed into base substrate then, with base substrate dry 5h under 100 ℃.
5, the normal atmosphere sintering method of magnetic abrasive as claimed in claim 1 is characterized in that: in the step 4) dried base substrate is put into electric furnace and carry out sintering at 850～1300 ℃, sintering time 4～12h, cooling naturally.
6, the normal atmosphere sintering method of magnetic abrasive as claimed in claim 1 is characterized in that: in the step 5) burned base substrate is carried out fragmentation, screening promptly gets magnetic abrasive then.
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| CN2009100139441A CN101481597B (en) | 2009-01-17 | 2009-01-17 | Normal atmosphere sintering method for magnetic grinding medium |
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| CN101481597B CN101481597B (en) | 2012-04-25 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899282A (en) * | 2010-06-23 | 2010-12-01 | 山东理工大学 | Preparation method of pneumatic atomizing rapid condensation magnetic abrasive material |
| CN102643094A (en) * | 2012-04-05 | 2012-08-22 | 燕山大学 | Preparation method of silicon carbide grinding tool |
| CN104339278A (en) * | 2013-08-07 | 2015-02-11 | 辽宁黄海砂轮制造有限公司 | Millstone, and preparation method and application thereof |
| CN105838325A (en) * | 2015-01-15 | 2016-08-10 | 中芯国际集成电路制造(上海)有限公司 | Grinding fluid, preparation method of the same and chemical mechanical grinding method |
| CN106753241A (en) * | 2016-11-30 | 2017-05-31 | 郑州宏基研磨科技有限公司 | magnetic abrasive and preparation method thereof |
| EP3269474A1 (en) * | 2016-07-12 | 2018-01-17 | Hamilton Sundstrand Corporation | Additive manufacturing method |
| CN108611057A (en) * | 2018-05-16 | 2018-10-02 | 西安思源学院 | A kind of exceptional hardness magnetic abrasive grain and preparation method thereof |
| CN108949106A (en) * | 2018-06-19 | 2018-12-07 | 郑州磨料磨具磨削研究所有限公司 | A kind of magnetic abrasive and preparation method thereof |
| CN109890931A (en) * | 2016-10-25 | 2019-06-14 | 3M创新有限公司 | Magnetisable abrasive grain and abrasive product comprising magnetisable abrasive grain |
| CN109890930A (en) * | 2016-10-25 | 2019-06-14 | 3M创新有限公司 | Magnetisable abrasive grain and preparation method thereof |
| CN111073518A (en) * | 2019-12-09 | 2020-04-28 | 湖南景翌湘台环保高新技术开发有限公司 | Preparation method of silicon-aluminum composite polishing powder |
| CN113150743A (en) * | 2021-04-19 | 2021-07-23 | 山东理工大学 | Method for preparing fast-setting magnetic abrasive by combining brazing enhanced plasma molten metal micro-droplets and abrasive powder |
| CN113969137A (en) * | 2021-10-25 | 2022-01-25 | 浙江工业大学 | Core-shell type magnetic abrasive and preparation method thereof |
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| SU755538A1 (en) * | 1978-05-15 | 1980-08-15 | Inst Problem Materialovedenia | Material for magnetic abrasive treatment |
| EP0443840B1 (en) * | 1990-02-21 | 1995-04-19 | Toda Kogyo Corp. | Superparamagnetic fine particles of iron oxide and magnetic recording media containing said particles |
| US5846270A (en) * | 1998-04-06 | 1998-12-08 | Feygin; Savva | Magnetic-abrasive powder and method of producing the same |
| CN1131290C (en) * | 2000-12-20 | 2003-12-17 | 太原理工大学 | Hot pressing sintering process of preparing magnetic abrasive |
| TW200626299A (en) * | 2005-01-24 | 2006-08-01 | Ching-Tien Lin | Improved method for manufacturing magnetic abrasive for use in magnetic grinding |
| EP1717285A1 (en) * | 2005-04-26 | 2006-11-02 | Basf Aktiengesellschaft | Self stabilizing CMP composition for metal layers |
| JP4728916B2 (en) * | 2006-08-31 | 2011-07-20 | 国立大学法人 東京大学 | Magnetic material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899282A (en) * | 2010-06-23 | 2010-12-01 | 山东理工大学 | Preparation method of pneumatic atomizing rapid condensation magnetic abrasive material |
| CN102643094A (en) * | 2012-04-05 | 2012-08-22 | 燕山大学 | Preparation method of silicon carbide grinding tool |
| CN102643094B (en) * | 2012-04-05 | 2013-12-18 | 燕山大学 | Preparation method of silicon carbide grinding tool |
| CN104339278A (en) * | 2013-08-07 | 2015-02-11 | 辽宁黄海砂轮制造有限公司 | Millstone, and preparation method and application thereof |
| CN105838325B (en) * | 2015-01-15 | 2019-04-09 | 中芯国际集成电路制造(上海)有限公司 | A kind of lapping liquid, the method and chemical and mechanical grinding method for preparing lapping liquid |
| CN105838325A (en) * | 2015-01-15 | 2016-08-10 | 中芯国际集成电路制造(上海)有限公司 | Grinding fluid, preparation method of the same and chemical mechanical grinding method |
| EP3269474A1 (en) * | 2016-07-12 | 2018-01-17 | Hamilton Sundstrand Corporation | Additive manufacturing method |
| US10947432B2 (en) | 2016-10-25 | 2021-03-16 | 3M Innovative Properties Company | Magnetizable abrasive particle and method of making the same |
| CN109890931A (en) * | 2016-10-25 | 2019-06-14 | 3M创新有限公司 | Magnetisable abrasive grain and abrasive product comprising magnetisable abrasive grain |
| CN109890930A (en) * | 2016-10-25 | 2019-06-14 | 3M创新有限公司 | Magnetisable abrasive grain and preparation method thereof |
| CN109890930B (en) * | 2016-10-25 | 2021-03-16 | 3M创新有限公司 | Magnetizable abrasive particles and method of making same |
| US11072732B2 (en) | 2016-10-25 | 2021-07-27 | 3M Innovative Properties Company | Magnetizable abrasive particles and abrasive articles including them |
| CN106753241A (en) * | 2016-11-30 | 2017-05-31 | 郑州宏基研磨科技有限公司 | magnetic abrasive and preparation method thereof |
| CN108611057A (en) * | 2018-05-16 | 2018-10-02 | 西安思源学院 | A kind of exceptional hardness magnetic abrasive grain and preparation method thereof |
| CN108949106A (en) * | 2018-06-19 | 2018-12-07 | 郑州磨料磨具磨削研究所有限公司 | A kind of magnetic abrasive and preparation method thereof |
| CN108949106B (en) * | 2018-06-19 | 2020-12-01 | 郑州磨料磨具磨削研究所有限公司 | Magnetic abrasive and preparation method thereof |
| CN111073518A (en) * | 2019-12-09 | 2020-04-28 | 湖南景翌湘台环保高新技术开发有限公司 | Preparation method of silicon-aluminum composite polishing powder |
| CN111073518B (en) * | 2019-12-09 | 2021-11-05 | 湖南景翌湘台环保高新技术开发有限公司 | Preparation method of silicon-aluminum composite polishing powder |
| CN113150743A (en) * | 2021-04-19 | 2021-07-23 | 山东理工大学 | Method for preparing fast-setting magnetic abrasive by combining brazing enhanced plasma molten metal micro-droplets and abrasive powder |
| CN113969137A (en) * | 2021-10-25 | 2022-01-25 | 浙江工业大学 | Core-shell type magnetic abrasive and preparation method thereof |
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