CN104478440B - A kind of bearing ceramic material and preparation method thereof - Google Patents
A kind of bearing ceramic material and preparation method thereof Download PDFInfo
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- CN104478440B CN104478440B CN201410677871.7A CN201410677871A CN104478440B CN 104478440 B CN104478440 B CN 104478440B CN 201410677871 A CN201410677871 A CN 201410677871A CN 104478440 B CN104478440 B CN 104478440B
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Abstract
The invention provides a kind of bearing ceramic material and preparation method thereof, following raw material prepare: Si3N460��80 weight portions, Al2O35��10 weight portions, sepiolite powder 1��5 weight portion, attapulgite powder 1��5 weight portion, binding agent 0.5��3 weight portion. Compared with prior art, the present invention is with Si3N4As raw material, its bending strength is higher, and hardness is also significantly high, has self lubricity simultaneously, and coefficient of friction is little, has good abrasion resistance properties. The present invention is also with Al2O3, sepiolite powder and attapulgite powder be raw material, utilize synergism each other, improve the abrasion resistance properties of this bearing ceramic material. Additionally, the present invention adopts ball milling and sintering processes to prepare bearing ceramic material, ball-milling treatment more can ensure that the precision of product, greatly increases economic benefit and work efficiency. Test result indicate that, the abrasion resistance properties of bearing ceramic material prepared by the present invention is better.
Description
Technical field
The present invention relates to technical field of ceramic material, particularly relate to a kind of bearing ceramic material and preparation method thereof.
Background technology
Bearing, as important mechanical basic part, is widely used in scientific and technological and economic every field. Along with the development of science and technology, the machine worked under some high-tech areas and some special working environment, the requirement of bearing is more and more higher, and common bearing material can not meet needs again. Therefore, develop and seek new bearing material to promoting that scientific and technological progress and economic development have very important significance.
The performance of ceramic bearing material is to affect the most critical of bearing quality, topmost factor. Ceramic bearing invent in decades, aluminium oxide, carborundum, silicon nitride structure ceramic material be in succession used for preparing ceramic bearing. Research shows, in current ceramic material, self-toughening ceramic is owing to having higher bending strength and fracture toughness, and the failure mode of the bearing being made from is tired peeling, it is believed that be the more satisfactory bearing material manufacturing bearing roller.
In prior art, application number be 200310114631.8 Chinese patent literature report a kind of titanium carbonitride base ceramic bearing materials using metal and powder as raw material, adopt the liquid sintering technology content by adjustment system Raw component, having prepared the dense material of applicable manufacture ceramic bearing ring, this material is by Ti-Ni-Co-Mo2C-Cr3C2And Ti-Ni-Co-Mo-C-Cr3C2Material system is constituted. But, the abrasion resistance properties of the dense material of this ceramic bearing ring is poor, thus service life is shorter.
Summary of the invention
Present invention solves the technical problem that and be in that to provide a kind of bearing ceramic material and preparation method thereof, this bearing ceramic material abrasion resistance properties is better.
In view of this, the invention provides a kind of bearing ceramic material, consist of the following composition:
Preferably, consist of the following composition:
Accordingly, the preparation method that the present invention also provides for a kind of bearing ceramic material, comprise the following steps:
By 60��80 weight portion Si3N4, 5��10 weight portion Al2O3, 1��5 weight portion sepiolite powder, 1��5 weight portion attapulgite powder and the mixing of 0.5��3 parts by weight binder, inject ball-milling treatment 5��20 hours in ball mill, after sintering, obtain bearing ceramic material.
Preferably, the particle diameter of described sepiolite powder is 20��50 ��m.
Preferably, the particle diameter of described attapulgite powder is 70��90 ��m.
Preferably, described binding agent is that the dextrin of 0.5��1.5:2��3:20��29:10, carboxymethyl cellulose, distilled water and arabia gum solution are constituted by weight ratio, and the mass concentration of described arabia gum solution is 8��9%.
Preferably, described Si3N4It is 70��80 weight portions, Al2O3Being 5��8 weight portions, sepiolite powder is 3��5 weight portions, and attapulgite powder is 1��3 weight portion, and binding agent is 1��2 weight portion.
Preferably, described sintering step particularly as follows:
It is warming up to 420��460 DEG C and is incubated 2��3 hours, then heat to 600��650 DEG C and be incubated 5��8 hours.
The invention provides a kind of bearing ceramic material and preparation method thereof, following raw material prepare: Si3N460��80 weight portions, Al2O35��10 weight portions, sepiolite powder 1��5 weight portion, attapulgite powder 1��5 weight portion, binding agent 0.5��3 weight portion. Compared with prior art, the present invention is with Si3N4As raw material, its bending strength is higher, and hardness is also significantly high, has self lubricity simultaneously, and coefficient of friction is little, has good abrasion resistance properties. The present invention is also with Al2O3, sepiolite powder and attapulgite powder be raw material, utilize synergism each other, improve the abrasion resistance properties of this bearing ceramic material. Additionally, the present invention adopts ball milling and sintering processes, namely obtaining bearing ceramic material, ball-milling treatment more can ensure that the precision of product, greatly increases economic benefit and work efficiency. Test result indicate that, the abrasion resistance properties of bearing ceramic material prepared by the present invention is better, and service life is longer.
Detailed description of the invention
In order to be further appreciated by the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but it is to be understood that these describe simply as further illustrating the features and advantages of the present invention, rather than limiting to the claimed invention.
The embodiment of the invention discloses a kind of bearing ceramic material, consist of the following composition:
Preferably, described bearing pottery material consists of the following composition:
Silicon nitride is to have the cancellated atomic crystal of space multistory, and character is as follows: hardness is high, and coefficient of friction is little, has self lubricity, is extremely excellent high-abrasive material; Creep resistance is high, and coefficient of thermal expansion is little, and thermal shock resistance is best in pottery; Chemical stability is good, outside dehydrogenation fluoric acid, resistant to the corrosion of various acid, chloroazotic acid and alkali liquor, is also resistant to the erosion of motlten metal; Silicon nitride is covalent bond crystal, both without free electron also without ion, has the electrical insulation capability of excellence.
Using aluminium oxide as the component of ceramic material, the intensity of the pottery of formation is high, is 2��6 times of conventional ceramic, and tensile strength is up to 250MPa; Wearability is good, and hardness is inferior to diamond, boron carbide, cubic boron nitride and carborundum; Resistance to elevated temperatures is good, can long-term work at 1600 DEG C, aerial maximum operation (service) temperature reaches 1980 DEG C; Corrosion resistance and good insulating.
Meerschaum can be divided into hot-liquid type sepiolite and appositional pattern meerschaum two types according to the reason formed, and is commonly referred to ��-type meerschaum and ��-type meerschaum. Hot-liquid type sepiolite ore deposit is formed by hydrothermal solution direct crystallization or is formed through low temperature hot liquid alteration by volcanic glass, mineral containing magnesium, often originates in rich in the dolomitic limestone of magnesium, dolomitic marble stone;Appositional pattern sepiolite deposit often and carbonate rock, clay rock symbiosis, is generated by diagenesis. Hot-liquid type sepiolite is fibre bundle shape, MgO (magnesium oxide) and SiO2(silicon dioxide) content is high, Al2O3(aluminium oxide) content is low, for Mg-rich sepiolite; Appositional pattern meerschaum is argillaceous, but observes under an electron microscope still in threadiness, modified meerschaum Al2O3Content is high, Mg and SiO2Content is low, for rich meerschalminite. Present invention preferably uses the sepiolite powder that particle diameter is 20��50 microns, more preferably 25��40 microns. Through activation processing sepiolite powder effect more preferably, have strengthen abrasion resistance properties effect. Present invention preferably uses acid activation, for instance working concentration is that the sulphuric acid of 0.1��20% is at 20��100 DEG C of immersion treatment 1��15h of temperature.
Attapulgite is monoclinic system, and its desirable chemical formula is; Mg5(H2O)4[Si4O10]2(OH)2, chemical composition theoretical value is MgO23.83%, SiO256.96%, H2O19.21%. Attapulgite in nature often has Al3+��Fe3+Deng isomorphous replacement, rich Al3+��Fe3+Mutation be called aluminum attapulgite and ferrum attapulgite. Composition such as the aluminum attapulgite powder of Xuyi County of Jiangsu Province Dragon King's mountain products is SiO258.38%, MgO12.10%, Al2O39.50%, CaO0.40%, TiO20.56%, MnO0.05%, Fe2O3+ FeO5.26%, Na2O1.10%, K2O1.24%. Present invention preferably employs the attapulgite powder after acid activation processes, the particle diameter of this attapulgite powder is preferably 70��90 ��m, more preferably 75��85 ��m.
According to the present invention, described binding agent is that the dextrin of 0.5��1.5:2��3:20��29:10, carboxymethyl cellulose, distilled water and arabia gum solution are constituted by weight ratio, and the mass concentration of described arabia gum solution is 8��9%.
The present invention is with Si3N4��Al2O3, sepiolite powder, attapulgite powder, binding agent be raw material, utilize synergism each other, improve the abrasion resistance properties of this bearing ceramic material.
Accordingly, the preparation method that the present invention also provides for a kind of bearing ceramic material, comprise the following steps: by 60��80 weight portion Si3N4, 5��10 weight portion Al2O3, 1��5 weight portion sepiolite powder, 1��5 weight portion attapulgite powder and the mixing of 0.5��3 parts by weight binder, inject ball-milling treatment 5��20 hours in ball mill, after sintering, obtain bearing ceramic material.
In the process preparing bearing ceramic material, described sintering step is incubated 2��3 hours particularly as follows: be warming up to 420��460 DEG C, then heat to 600��650 DEG C and be incubated 5��8 hours, it is more preferably: be warming up to 420��450 DEG C and be incubated 2��3 hours, then heats to 600��630 DEG C and be incubated 5��8 hours. Present invention preferably employs the sintering process of two-stage intensification, it may be assumed that first 420��460 DEG C of insulations, it is ensured that its densified sintering product, be conducive to controlling sintering shrinkage and be conducive to the dense sintering of material. Then heat to 600��650 DEG C and be incubated 5��8 hours, the further sintering densification of material, it is ensured that the abrasion resistance properties of this ceramic material.
The raw material that the present invention adopts is preferably: described Si3N4It is 70��80 weight portions, Al2O3Being 5��8 weight portions, sepiolite powder is 3��5 weight portions, and attapulgite powder is 1��3 weight portion, and binding agent is 1��2 weight portion, it is furthermore preferred that described Si3N4It is 70��75 weight portions, Al2O3Being 5��6 weight portions, sepiolite powder is 4��5 weight portions, and attapulgite powder is 1��2 weight portion, and binding agent is 1��2 weight portion.
Adopting the ceramic material that preparation method of the present invention prepares, then make various bearing, abrasion resistance properties is better, and service life is longer.
In order to be further appreciated by the present invention, below in conjunction with embodiment, technical scheme provided by the invention being described in detail, protection scope of the present invention is not limited by the following examples.
Embodiment 1
Being the dextrin of 1:2:25:10, carboxymethyl cellulose, distilled water and the mixing of arabia gum solution by weight ratio, the mass concentration of described arabia gum solution is 8%, obtains binding agent.
By 60gSi3N4��8gAl2O3, 3g particle diameter be 40 ��m sepiolite powder, 3g particle diameter be 80 ��m of attapulgite powders and the above-mentioned preparation of 1g binding agent mixing, inject ball milling 10 hours in ball mill, it is warming up to 430 DEG C and is incubated 3 hours, after then heating to 620 DEG C of insulations 6 hours, obtain bearing ceramic material.
Bearing ceramic material prepared by the present embodiment carries out performance detection.
Taking bearing ceramic material prepared by the present embodiment and be bonded on carbon steel coupon, grind with emery wheel flat, be then mounted on dish on pin friction gauge, test according to ASTMG99-95a, obtaining average friction coefficient COF is 0.096; 24 hours grind the degree of depth is 2 microns.
Embodiment 2
Being the dextrin of 0.5:2:20:10, carboxymethyl cellulose, distilled water and the mixing of arabia gum solution by weight ratio, the mass concentration of described arabia gum solution is 8%, obtains binding agent.
By 80gSi3N4��8gAl2O3, 1g particle diameter be 40 ��m sepiolite powder, 1g particle diameter be 80 ��m of attapulgite powders and the above-mentioned preparation of 2g binding agent mixing, inject ball milling 10 hours in ball mill, it is warming up to 430 DEG C and is incubated 3 hours, after then heating to 620 DEG C of insulations 6 hours, obtain bearing ceramic material.
Bearing ceramic material prepared by the present embodiment carries out performance detection.
Taking bearing ceramic material prepared by the present embodiment and be bonded on carbon steel coupon, grind with emery wheel flat, be then mounted on dish on pin friction gauge, test according to ASTMG99-95a, obtaining average friction coefficient COF is 0.092; 24 hours grind the degree of depth is 3 microns.
Embodiment 3
Being the dextrin of 0.5:2:20:10, carboxymethyl cellulose, distilled water and the mixing of arabia gum solution by weight ratio, the mass concentration of described arabia gum solution is 8%, obtains binding agent.
By 60gSi3N4��8gAl2O3, 3g particle diameter be 40 ��m sepiolite powder, 5g particle diameter be 80 ��m of attapulgite powders and the above-mentioned preparation of 3g binding agent mixing, inject ball milling 10 hours in ball mill, it is warming up to 430 DEG C and is incubated 3 hours, after then heating to 620 DEG C of insulations 6 hours, obtain bearing ceramic material.
Bearing ceramic material prepared by the present embodiment carries out performance detection.
Taking bearing ceramic material prepared by the present embodiment and be bonded on carbon steel coupon, grind with emery wheel flat, be then mounted on dish on pin friction gauge, test according to ASTMG99-95a, obtaining average friction coefficient COF is 0.094; 24 hours grind the degree of depth is 2.8 microns.
Embodiment 4
Being the dextrin of 1.5:2:28:10, carboxymethyl cellulose, distilled water and the mixing of arabia gum solution by weight ratio, the mass concentration of described arabia gum solution is 8%, obtains binding agent.
By 70gSi3N4��6gAl2O3, 4g particle diameter be 40 ��m sepiolite powder, 1g particle diameter be 80 ��m of attapulgite powders and the above-mentioned preparation of 2g weight portion binding agent mixing, inject ball milling 10 hours in ball mill, it is warming up to 430 DEG C and is incubated 3 hours, after then heating to 620 DEG C of insulations 6 hours, obtain bearing ceramic material.
Bearing ceramic material prepared by the present embodiment carries out performance detection.
Taking bearing ceramic material prepared by the present embodiment and be bonded on carbon steel coupon, grind with emery wheel flat, be then mounted on dish on pin friction gauge, test according to ASTMG99-95a, obtaining average friction coefficient COF is 0.090; 24 hours grind the degree of depth is 2.1 microns.
The explanation of above example is only intended to help to understand method and the core concept thereof of the present invention. It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention carries out some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention. The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments. Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (8)
1. a bearing ceramic material, it is characterised in that its raw material consists of the following composition:
2. bearing ceramic material according to claim 1, it is characterised in that its raw material consists of the following composition:
3. the preparation method of a bearing ceramic material, it is characterised in that comprise the following steps:
By 60��80 weight portion Si3N4, 5��10 weight portion Al2O3, 1��5 weight portion sepiolite powder, 1��5 weight portion attapulgite powder and the mixing of 0.5��3 parts by weight binder, inject ball-milling treatment 5��20 hours in ball mill, after sintering, obtain bearing ceramic material.
4. preparation method according to claim 3, it is characterised in that the particle diameter of described sepiolite powder is 20��50 ��m.
5. preparation method according to claim 3, it is characterised in that the particle diameter of described attapulgite powder is 70��90 ��m.
6. preparation method according to claim 3, it is characterized in that, described binding agent is that the dextrin of 0.5��1.5:2��3:20��29:10, carboxymethyl cellulose, distilled water and arabia gum solution are constituted by weight ratio, and the mass concentration of described arabia gum solution is 8��9%.
7. preparation method according to claim 3, it is characterised in that described Si3N4It is 70��80 weight portions, Al2O3Being 5��8 weight portions, sepiolite powder is 3��5 weight portions, and attapulgite powder is 1��3 weight portion, and binding agent is 1��2 weight portion.
8. preparation method according to claim 3, it is characterised in that described sintering step particularly as follows:
It is warming up to 420��460 DEG C and is incubated 2��3 hours, then heat to 600��650 DEG C and be incubated 5��8 hours.
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Effective date of registration: 20170517 Address after: 528100 Industrial Park, Leping Town, Sanshui District, Guangdong, Foshan Patentee after: Foshan Sanshui Jinying Inorganic Materials Co., Ltd. Address before: And the industrial district of Liuzhou City, the Guangxi Zhuang Autonomous Region Hongkong city 545000 Parc court Lane 4 Building No. 3 Patentee before: LIUZHOU CHUANGYU TECHNOLOGY CO., LTD. |
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Address after: 529241 No.8, west area, Nafu Industrial Park, Shenjing Town, Taishan City, Jiangmen City, Guangdong Province (Information Declaration System) Patentee after: Guangdong elite inorganic materials Co.,Ltd. Address before: 528100 Industrial Park, Leping Town, Sanshui District, Guangdong, Foshan Patentee before: FOSHAN SANSHUI GOLDEN EAGLE INORGANIC MATERIAL Co.,Ltd. |