CN103011835B - Production process of high-compactness compound ceramic ball bearing rolling element - Google Patents
Production process of high-compactness compound ceramic ball bearing rolling element Download PDFInfo
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- CN103011835B CN103011835B CN201210496682.0A CN201210496682A CN103011835B CN 103011835 B CN103011835 B CN 103011835B CN 201210496682 A CN201210496682 A CN 201210496682A CN 103011835 B CN103011835 B CN 103011835B
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Abstract
The invention relates to a production process of a high-compactness compound ceramic ball bearing rolling element, and belongs to the field of bearing rolling element preparation. The process comprises the two steps of ceramic sintering and grinding, wherein the sintering step can sinter the silicon nitride-aluminum nitride-cubic boron nitride compound ceramic ball material at normal pressure; and grinding agents in the grinding phases of the grinding step comprise a coarse grinding agent, a fine grinding agent and a super-fine grinding. The grinding agents are used in combination in the phases of grinding, and can achieve the effects of high grinding efficiency, little pollution to the ceramic body, improved grinding efficiency, and reduced grinding time. The ceramic ball bearing rolling element has the advantages of low density, high hardness, low friction coefficient, good wear resistance, self-lubrication and rigidity, and the like, and can be widely used as a rolling element of a bearing.
Description
Technical field
The production technology that the present invention relates to a kind of high-compactness composite ceramics ball bearing roller kinetoplast, belongs to bearing roller preparation field.
Background technology
Ball bearing is a kind of of rolling bearing, and ball ball is contained in the centre of interior steel ring and outer rim, can bear larger load.Ceramic Balls particularly silicon nitride ball has low-density, high rigidity, low-friction coefficient, and the features such as wear-resisting, self-lubricating and good rigidly are particularly suitable for doing at a high speed, the rolling element of high accuracy and long-life hybrid ceramic ball bearing.
Cubic boron nitride ceramic all has good heat resistance, heat endurance, thermal conductivity, is desirable heat sink material and high temperature insulating material.The chemical stability of boron nitride is good, can resist the etch of most of motlten metal.It also has good self lubricity.Yet its hardness is low compared with other high-strength ceramics, be applicable to make high-temperature bearing.Yet the sintering condition of cubic boron nitride ceramic is extremely harsh, in order to reduce its sintering temperature and condition, need in sintering process, add other sintering aids.
It is very high and extremely high temperature resistant that silicon nitride ceramics has high intensity, and its intensity does not decline at the high temperature of 1200 ℃, after being heated, can not be melt into and melt body, simultaneously, its resistance to chemical corrosion is excellent, the soda bath below the inorganic acid that ability is nearly all and 30%, the also a lot of organic acid corrosion of ability.The sintering process of silicon nitride ceramics is generally three kinds: high temperature insostatic pressing (HIP) (HIP), hot pressing (HP) and gas pressure sintering.The pressure of atmosphere sintering is 5 ~ 10MPa, and the pressure of hot pressed sintering is 70Mpa left and right, and the pressure of the sintering of high temperature insostatic pressing (HIP) is 150MPa ~ 200MPa.
In order to strengthen thermal conductivity and the self lubricity of silicon nitride ceramics, a kind of multiphase composite material need to be provided, and reduce sintering pressure, realize pressureless sintering.
The grinding of Ceramic Balls generally comprises the step of corase grind, fine grinding and super grinding or polishing, in each step, Ceramic Balls is carried out to grinding to a certain degree, in order to reach better grinding effect, need to rationally use the grinding reagent in individual stage.
Summary of the invention
The production technology that the object of this invention is to provide a kind of high-compactness composite ceramics ball bearing roller kinetoplast, this technique comprises ceramic post sintering and two steps of grinding, and sintering step can be realized sintered silicon nitride-aluminium nitride under normal pressure-cubic boron nitride composite ceramics ball material; Each grinding agent that grinds the stage of grinding steps comprises corase grind grinding agent, fine grinding grinding agent and super grinding grinding agent.These grinding agents are used in conjunction with in grinding each stage, can reach grinding efficiency high, and ceramic body is polluted less, improve the effect of grinding efficiency, minimizing milling time.This ceramic ball bearing rolling element has low-density, high rigidity, low-friction coefficient, and wear-resisting, self-lubricating and good rigidly etc. can be widely used as the rolling element of bearing.
A production technology for high-compactness composite ceramics ball bearing roller kinetoplast, comprises following processing step:
1. ceramic raw material preparation: ceramic raw material is after drying mixed in proportion, sieve, the powder after sieving is placed in to ball mill ball milling,
Wherein, described ceramic raw material, by mass percentage, is comprised of following component:
2. compressing: by step 1. gained powder be placed in grinding tool, adopt the method for isostatic cool pressing to be pressed into spherical;
3. sintering: in nitrogen atmosphere, powder is placed in to mould, at 1500 ℃ ~ 1750 ℃ insulation 2h ~ 6h, stops cooling to room temperature with the furnace after heating;
4. grinding and polishing: gained Ceramic Balls is ground and polishing, and the sphericity of Ceramic Balls is no more than 0.07 micron, and surface roughness is no more than 0.008 micron, carries out as follows:
I. roughly grind: load pressure 5 ~ 20N/ ball; In corase grind grinding agent used, the granularity of diamond particles is 20 ~ 100 μ m, and described diamond particles is spherical, and its sphericity is 0.6 ~ 0.7;
II. refine: load pressure 1 ~ 5N/ ball; In described fine grinding grinding agent, the granularity of diamond particles is 1 ~ 10 μ m, and described diamond particles is spherical, and its sphericity is 0.7 ~ 0.75;
III. super grinding: 0.1 ~ 1N/ ball; In described super grinding grinding agent, the granularity of diamond particles is 0.01 ~ 1 μ m, and described diamond particles is spherical, and its sphericity is 0.75 ~ 0.85.
Described corase grind grinding agent, fine grinding grinding agent and super grinding grinding agent are 1:1 ~ 1:4 with the mass ratio that grinds matrix; Described matrix is water or kerosene.
Described in optimal process of the present invention, roughly grind grinding agent, fine grinding grinding agent and super grinding grinding agent, by mass percentage, by following component, formed:
Ceramic raw material described in optimal process of the present invention, by mass percentage, is comprised of following component:
The further preferred following proposal of optimal process of the present invention:
A preparation method for high fine and close composite ceramics ball, comprises following processing step:
1. ceramic raw material preparation: ceramic raw material is after drying mixed in proportion, cross 80 ~ 200 mesh sieves, the powder after sieving is placed in to ball mill, in speed ball milling 2h ~ 6h of 300 ~ 360r/min;
2. compressing: by step 1. gained powder be placed in grinding tool, adopt the method for isostatic cool pressing to be pressed into spherical;
3. sintering: in nitrogen atmosphere, powder is placed in to mould, the speed with 10 ~ 20 ℃/min in sintering furnace is warming up to 1500 ℃ ~ 1750 ℃, insulation 2h ~ 6h, stops cooling to room temperature with the furnace after heating, and wherein nitrogen flow rate is 1 ~ 5L/min;
4. grinding and polishing: gained Ceramic Balls is ground and polishing, and the sphericity of Ceramic Balls is no more than 0.07 micron, and surface roughness is no more than 0.008 micron.
The invention has the beneficial effects as follows: the production technology that the invention provides a kind of high fine and close composite ceramics ball bearing roller kinetoplast, this technique comprises ceramic post sintering and two steps of grinding, and sintering step can be realized sintered silicon nitride-aluminium nitride under normal pressure-cubic boron nitride composite ceramics ball material; Each grinding agent that grinds the stage of grinding steps comprises corase grind grinding agent, fine grinding grinding agent and super grinding grinding agent.These grinding agents are used in conjunction with in grinding each stage, can reach grinding efficiency high, and ceramic body is polluted less, improve the effect of grinding efficiency, minimizing milling time.This ceramic ball bearing rolling element has low-density, high rigidity, low-friction coefficient, and wear-resisting, self-lubricating and good rigidly etc. can be widely used as the rolling element of bearing.
The specific embodiment
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
Embodiment 1
1. ceramic raw material preparation: ceramic raw material is after drying mixed in proportion, cross 120 mesh sieves, the powder after sieving is placed in to ball mill, in the speed ball milling 5h of 300r/min;
2. compressing: by step 1. gained powder be placed in grinding tool, adopt the method for isostatic cool pressing to be pressed into spherical;
3. sintering: in nitrogen atmosphere, powder is placed in to mould, the speed with 15 ℃/min in sintering furnace is warming up to 1750 ℃, insulation 3h, stops cooling to room temperature with the furnace after heating, and wherein nitrogen flow rate is 2L/min;
4. grinding and polishing: I. roughly grinds: load pressure 10N/ ball; In described corase grind grinding agent, the granularity of diamond particles is 20 ~ 100 μ m, and described diamond particles is spherical, and its sphericity is 0.65, and in diamond particles, granularity is that the quality of the diamond particles of 20 ~ 50 μ m at least accounts for 65% of diamond particles gross mass;
II. refine: load pressure 2N/ ball; In described fine grinding grinding agent, the granularity of diamond particles is 1 ~ 10 μ m, and described diamond particles is spherical, and its sphericity is 0.7, and in diamond particles, granularity is that the quality of the diamond particles of 1 ~ 5 μ m at least accounts for 65% of diamond particles gross mass;
III. super grinding: 0.5N/ ball; In described super grinding grinding agent, the granularity of diamond particles is 0.01 ~ 1 μ m, and described diamond particles is spherical, and its sphericity is 0.75, and in diamond particles, granularity is that the quality of the diamond particles of 0.01 ~ 0.5 μ m at least accounts for 70% of diamond particles gross mass,
Described corase grind grinding agent, fine grinding grinding agent and super grinding grinding agent, by mass percentage, be comprised of following component:
Dispersant is polyethylene glycol.By three kinds of grinding agents, 1:1 is stage by stage for polishing silicon nitride Ceramic Balls after mixing in mass ratio with water, and the sphericity of gained Ceramic Balls is 0.05 μ m, surface roughness 0.005 μ m.
Claims (1)
1. a production technology for high-compactness composite ceramics ball bearing roller kinetoplast, is characterized in that: comprise following processing step:
1. ceramic raw material preparation: ceramic raw material is after drying mixed in proportion, sieve, the powder after sieving is placed in to ball mill ball milling,
Wherein, described ceramic raw material, by mass percentage, is comprised of following component:
2. compressing: by step 1. gained powder be placed in grinding tool, adopt the method for isostatic cool pressing to be pressed into spherical;
3. sintering: in nitrogen atmosphere, powder is placed in to mould, at 1500 ℃～1750 ℃ insulation 2h～6h, stops cooling to room temperature with the furnace after heating;
4. grinding and polishing: gained Ceramic Balls is ground and polishing, and the sphericity of Ceramic Balls is no more than 0.07 micron, and surface roughness is no more than 0.008 micron, carries out as follows:
I. roughly grind: load pressure 5～20N/ ball; In corase grind grinding agent used, the granularity of diamond particles is 20～100 μ m, and described diamond particles is spherical, and its sphericity is 0.6～0.7;
II. refine: load pressure 1～5N/ ball; In described fine grinding grinding agent, the granularity of diamond particles is 1～10 μ m, and described diamond particles is spherical, and its sphericity is 0.7～0.75;
III. super grinding: 0.1～1N/ ball; In described super grinding grinding agent, the granularity of diamond particles is 0.01～1 μ m, and described diamond particles is spherical, and its sphericity is 0.75～0.85;
Described corase grind grinding agent, fine grinding grinding agent and super grinding grinding agent are 1:1～1:4 with the mass ratio that grinds matrix; Described matrix is water or kerosene;
Described corase grind grinding agent, fine grinding grinding agent and super grinding grinding agent, by mass percentage, be comprised of following component:
Above-mentioned each constituent mass percentage sum is 100%.
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| CN201210496682.0A CN103011835B (en) | 2012-11-28 | 2012-11-28 | Production process of high-compactness compound ceramic ball bearing rolling element |
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| CN201210496682.0A CN103011835B (en) | 2012-11-28 | 2012-11-28 | Production process of high-compactness compound ceramic ball bearing rolling element |
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| CN103011835B true CN103011835B (en) | 2014-04-16 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104629683B (en) * | 2015-01-13 | 2017-01-11 | 江苏金石研磨有限公司 | Preparation method of high-strength parent nucleus for centrifugal shaping of ceramic grinding ball |
| CN110395990B (en) * | 2019-08-27 | 2020-07-07 | 山东华工轴承有限公司 | High-quality bearing |
| CN110698206B (en) * | 2019-10-15 | 2021-10-22 | 洛阳轴承研究所有限公司 | Sintering method of large-size silicon nitride bearing ball and preparation method of large-size silicon nitride bearing ball |
| CN113043074A (en) * | 2019-12-26 | 2021-06-29 | 扬州振光机械有限公司 | Ball grinding processing technology |
| CN115849915A (en) * | 2022-12-23 | 2023-03-28 | 福建华清电子材料科技有限公司 | Aluminum nitride ball rolling forming method |
Citations (3)
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| CN101049676A (en) * | 2007-05-15 | 2007-10-10 | 山东东阿钢球集团有限公司 | Technique for processing silicon fluoride ball in G3 grade |
| CN101583804A (en) * | 2006-12-20 | 2009-11-18 | Ntn株式会社 | Rolling bearing, hub unit, rolling member, universal joint, torque transmission member for universal joint, and process for producing the same |
| CN101838144A (en) * | 2010-06-01 | 2010-09-22 | 陕西科技大学 | BaTiO3-based PTC thermal sensitive ceramic material and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101583804A (en) * | 2006-12-20 | 2009-11-18 | Ntn株式会社 | Rolling bearing, hub unit, rolling member, universal joint, torque transmission member for universal joint, and process for producing the same |
| CN101049676A (en) * | 2007-05-15 | 2007-10-10 | 山东东阿钢球集团有限公司 | Technique for processing silicon fluoride ball in G3 grade |
| CN101838144A (en) * | 2010-06-01 | 2010-09-22 | 陕西科技大学 | BaTiO3-based PTC thermal sensitive ceramic material and preparation method thereof |
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Effective date of registration: 20190129 Address after: 402460 703, 7th floor, Innovation and Development Center, 19 Lingfang Avenue, Changzhou Street, Rongchang District, Chongqing Patentee after: Chongqing Dayou Hongye Ceramics Co.,Ltd. Address before: 116600 Liaoning Province Dalian Jinpu New District No. 9 Liaohe West Second Road Patentee before: DALIAN DAYOU PRECISION CERAMIC BEARING Co.,Ltd. Effective date of registration: 20190129 Address after: 116600 Liaoning Province Dalian Jinpu New District No. 9 Liaohe West Second Road Patentee after: DALIAN DAYOU PRECISION CERAMIC BEARING Co.,Ltd. Address before: 116000 No. 9 Liaohe West Second Road, Dalian Development Zone, Liaoning Province Patentee before: DALIAN DAYOU HI-TECH CERAMIC Co.,Ltd. |