CN104989729A - Bearing material with self-lubricating property and preparation method thereof - Google Patents
Bearing material with self-lubricating property and preparation method thereof Download PDFInfo
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- CN104989729A CN104989729A CN201510439271.1A CN201510439271A CN104989729A CN 104989729 A CN104989729 A CN 104989729A CN 201510439271 A CN201510439271 A CN 201510439271A CN 104989729 A CN104989729 A CN 104989729A
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Abstract
The invention discloses a bearing material with the self-lubricating property and a preparation method thereof. Lubricating holes are formed in the surface of the bearing material. Solid self-lubricating bodies are embedded in the lubricating holes. The solid self-lubricating bodies are prepared by raw materials comprising, by weight, 5-8% of crystalline flake graphite, 1-3% of graphene oxide, 5-8% of molybdenum disulfide, 15-20% of solid oxide and the balance polytetrafluoroethylene powder. The bearing material can effectively achieve oil-free lubrication and produces no environmental pollution.
Description
Technical field
The present invention relates to a kind of bearing material with self-lubricating property.
Background technique
Along with various secondary industry machinery constantly develops to high performance, power drive and transmission condition becomes more and more harsher, often require that power drive and transmission component meet special condition, as frictional surface and the contacting fatigue resistance of bearing, the friction wear problem etc. on roll shaft surface when being rolled metal, affects the use of bearing material.Common liq lubricating bearings limit because of its frictional behavior, can not adapt to the requirement of special operation condition.Metallic based solid selflubricating, as the development of solid lubrication technology, breaches the film lubrication limit, can adapt to the requirement of multiple special operation condition, and application gets more and more.As low speed, high loading, back and forth and swing the occasion being difficult to form lubricant film, be in the occasion of easy aging, the oily inefficacy of outdoor work bad environments of pollution situation and lubricant film for a long time, under high temperature, low-temperature condition, lubrication effect is difficult to the occasion played.
Metal base mosaic type structure designs in advance on metallic matrix, process hole or the groove of certain area ratio, embed solid lubricant wherein, through special binder and ageing treatment, the two is combined into as a whole, have the mechanical property of matrix constituent element and the tribological property of solid lubricant concurrently, excellent combination property, be suitable in particular cases working various, especially can avoid the design of complicated oil circuit and subtract reduced-maintenance changing the loss brought, compared with plated film, the former self lubricity is good, rub little, long service life, reliability is high, under special operating conditions, there is good load adaptation, be applicable to multi-motion form.
A kind of thin wall embedded self-lubricating bearing of patent and manufacture method (publication number CN101532537A), adopt teflon, lead powder and molybdenum disulfide as solid lubricant when they are below 250 DEG C, 250 DEG C-400 DEG C time, adopt crystalline flake graphite and molybdenum disulfide as solid lubricant, by interference fit press-in blind hole.But it adopts lead powder, the pollution to environment can be caused.
Summary of the invention
The object of the invention is, in order to solve the defect existed in prior art, to provide one effectively can realize oil-free lubrication, and can not to bearing material of environment and preparation method thereof.
To achieve these goals, the invention provides a kind of bearing material with self-lubricating property, this bearing material surface is provided with lubrication hole; Self-lubricating solid body is inlaid with in lubrication hole; Self-lubricating solid body is prepared by the raw material of following weight percentage: crystalline flake graphite 5%-8%, graphene oxide 1%-3%, molybdenum disulfide 5%-8%, soild oxide 15%-20%, and all the other are polytetrafluorethylepowder powder.
Above-mentioned self-lubricating solid body is mounted to by epoxy resin-matrix compound binding agent in the lubrication hole on bearing material surface; Epoxy resin-matrix compound binding agent comprises the component of following weight percentage: polyimide 40%-45%, nano-oxide 8%-12%, plumbago 5%-8%, and all the other are epoxy resin.
Wherein, soild oxide adopts solid alumina or solid zirconia; Nano-oxide adopts nano aluminium oxide or nano zircite, and its Mean particle diameter is at 20-50nm.
The granularity of teflon is 60 ~ 80 μm; The granularity of crystalline flake graphite is 70-80 μm.
Lubrication hole is the half of bearing material thickness, is made into half through-hole structure.
Present invention also offers the preparation method of above-mentioned bearing material, comprise the following steps:
(1) self-lubricating solid body preparation: the material powder getting described self-lubricating solid body mixes, and after drying, puts into cylindrical die and carries out compression molding; Air calcination process is carried out to molded member, from room temperature, is heated to 250-300 DEG C, insulation 30-50 min, be heated to 380-420 DEG C again, insulation 5-8 h, then cools to 270-320 DEG C, insulation 3-5 h, finally with the obtained described self-lubricating solid body of stove cooling;
(2) epoxy resin-matrix compound binding agent preparation: each component of extracting epoxy resin base compound binding agent mixes by weight percentage, for subsequent use;
(3) self-lubricating solid body is inlayed: at the spaced lubrication hole of bearing material surface Machining; The diameter of described lubrication hole diameter and described self-lubricating solid body matches; By described bearing material 100-120 DEG C of preheating, then the epoxy resin-matrix compound binding agent of preparation in described step (2) is added in described lubrication hole, in step (1), the self-lubricating solid body of preparation is embedded in lubrication hole by epoxy resin-matrix compound binding agent, insulation 3-5 minute, then carries out quick air cooling.
Wherein, self-lubricating solid body adopts half built-in structure, and inserted depth is the half of described bearing material thickness, and self-lubricating solid body exceeds described bearing material 1-2mm after embedding; After self-lubricating solid body has embedded, carry out chip and polished.
Concrete steps are as follows:
(1) preparation of self-lubricating solid body.
1. the preparation of powder.With particle size range at polytetrafluoroethylene (PTFE) powder of 60 ~ 80 μm for matrix, add the crystalline flake graphite (5-8%) of 70-80 μm, graphene oxide (1-3%), molybdenum disulfide (5-8%) and soild oxide (15-20%), all the other are matrix.Powder mix, carrying out mechanical agitation with 1500-2000 r/min, mixes.
2. compression molding.Rear powder dry 1-3 h at 80-100 DEG C will be mixed.Then dried powder being put into diameter is the preferred 7mm of 6-8mm() cylinder type mould carry out compression molding, pressure is at 25-35 Mpa, and the dwell time is 10s.
3. sinter molding.Carry out sintering in air to molded member, from room temperature, be heated to 250-300 DEG C, insulation 30-50 min, is heated to about 380-420 DEG C, insulation 5-8 h, and when cooling to 270-320 DEG C, insulation 3-5 h, then cools with stove.
(2) self-lubricating solid body and half embeds the bonding between base structure.
Epoxy resin-matrix compound binding agent is mixed according to following proportioning: the polyimide of 40-45%, the nano-oxide of 20-50nm size of 8-12% and the plumbago of 5-8%, all the other are epoxy resin, then epoxy resin-matrix compound binding agent is carried out mechanical agitation with the speed of 500-800 r/min, mix.Wherein plumbago is for increasing the wear resistance of adhesive and thermal conductivity, making friction in friction process be easy to heat transfer on metal base, reducing the thermal expansion of solid lubricant; Nano-oxide is for improving intensity and the hardness of Bond.
At the spaced lubrication hole of bearing material surface Machining (half through-hole structure), 100-120 DEG C of preheating, the epoxy resin compound binding agent prepared before is joined in the lubrication hole of preheating bearing material, the self-lubricating solid body baked is mounted in lubrication hole by composite adhesive, insulation 3-5 minute, then carry out quick air cooling, the self-lubricating solid height of embedding goes out bearing material matrix surface 1-2mm; After having inlayed, carry out cutting and polish.
The present invention has the following advantages compared to existing technology:
(1) self-lubricating solid body of the present invention not only contributes to reducing friction factor by the graphene oxide adding certain content, and this graphene oxide has higher defect density, be easy to Cheng Jian in forming process and between other materials, decrease the porosity ratio of shaping rear self-lubricating solid body; And nano-oxide is added in adhesive design process, can make can keep higher bearing strength and cohesive force between self-lubricating solid body and matrix.
(2) self-lubricating solid body of the present invention adopts the damascene of half built-in in bearing material surface, not only be suitable for bearing when contact friction without oil drag situation, also the high abrasion problems on roll shaft surface in metal rolled process can be solved, both oil-free lubrications can be realized, the intensity of matrix can be kept again.Self-lubricating solid body can form transfer membrane in running, playing the effect of protection to mill axle, without stinging axle phenomenon, improve the wear-resisting property of friction member.And half built-in structure can make the design between the contact under some harsh conditions simplify, cost significantly reduces this, and practicability is very strong.
(3) the present invention is applicable to the place cannot refueling or be difficult to oiling, can not maintain in use or few maintenance.
Accompanying drawing explanation
Fig. 1 is the Raman spectrum of the graphene oxide that self-lubricating solid body of the present invention adopts;
Fig. 2 is the structural representation of bearing material of the present invention;
Fig. 3 is the longitudinal section of Fig. 2 middle (center) bearing material;
Fig. 4 is the wearing and tearing photo of effect example one of the present invention;
Fig. 5 is bearing material of the present invention and the wear extent comparison diagram of body material under the differentiated friction time.
In figure, 1-bearing material, 2-lubrication hole, 3-self-lubricating solid body.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail
Embodiment one
The present invention has the bearing material preparation of self-lubricating property:
(1) preparation of the polytetrafluoroethylene base solid self-lubricating body of nano aluminium oxide enhancing.
1. the preparation of powder.With particle size range at polytetrafluoroethylene (PTFE) powder of 60 ~ 80 μm for matrix, add the crystalline flake graphite 7% of 70-80 μm, graphene oxide 1%, molybdenum disulfide 6% and solid alumina 20%, all the other are matrix.Powder mix, carrying out mechanical agitation with 2000 r/min, mixes.As shown in Figure 1, graphene oxide has higher defect density, is easy to Cheng Jian in forming process and between other materials, decreases the porosity ratio of shaping rear self-lubricating solid body.
2. compression molding.Rear powder dry 2 h at 80-100 DEG C will be mixed.Then dried powder being put into diameter is that the cylinder type mould of 7mm carries out compression molding, and pressure is at 30 MPa, and the dwell time is 10s.
3. sinter molding.Sintering in air is carried out to molded member, from room temperature, is heated to 280 DEG C, be incubated 40 min, be heated to about 380 DEG C, be incubated 6 h, when cooling to 300 DEG C, be incubated 4 h, then cool with stove.
(2) self-lubricating solid body and half embeds the bonding between base structure.
Mixed according to following proportioning by epoxy resin-matrix compound binding agent: the polyimide of 42%, the nano aluminium oxide of 20-50nm size of 8% and the graphite of 5%, all the other are epoxy resin.Then epoxy resin-matrix compound binding agent is carried out mechanical agitation with the speed of 600 r/min, and mix.
As shown in Figure 2, at bearing material 1 surface Machining spaced lubrication hole 2(half through-hole structure, as shown in Figure 3, the degree of depth in hole is the half of bearing material thickness), 105 DEG C of preheatings, joined in the lubrication hole 2 of preheating bearing material by the epoxy resin-matrix compound binding agent prepared before, the self-lubricating solid body baked is mounted in lubrication hole 2 by adhesive, be incubated 4 minutes, then carry out quick air cooling.After having inlayed, carry out cutting and polish.
Implement two
The present invention has the bearing material preparation of self-lubricating property:
(1) preparation of the polytetrafluoroethylene base solid self-lubricating body of nano zircite enhancing.
1. the preparation of powder.With particle size range at polytetrafluoroethylene (PTFE) powder of 60 ~ 80 μm for matrix, add the crystalline flake graphite 6% of 70-80 μm, graphene oxide 2 %, molybdenum disulfide 6% and solid zirconia 20%, all the other are matrix.Powder mix, carrying out mechanical agitation with 2000 r/min, mixes.
2. compression molding.Rear powder dry 2 h at 100 DEG C will be mixed.Then dried powder being put into diameter is that the cylinder type mould of 7mm carries out compression molding, and pressure is at 35 Mpa, and the dwell time is 10 s.
3. sinter molding.Sintering in air is carried out to molded member, from room temperature, is heated to 300 DEG C, be incubated 40 min, be heated to about 400 DEG C, be incubated 7 h, when cooling to 300 DEG C, be incubated 5 h, then cool with stove.
(2) bonding of making self-lubricating solid body by oneself and partly embedding between base structure.
Mixed according to following proportioning by epoxy resin-matrix compound binding agent: the polyimide of 45%, the nano zircite of 20-50 nm size of 10% and the graphite of 6%, all the other are epoxy resin.Then epoxy resin-matrix compound binding agent is carried out mechanical agitation with the speed of 800 r/min, and mix.
At 14Cr bearing material 1 surface Machining spaced lubrication hole 2(half through-hole structure), 100-120 DEG C of preheating, the epoxy resin-matrix compound binding agent prepared before is joined in the lubrication hole of preheating bearing material, the self-lubricating solid body 3 baked is mounted in lubrication hole 2 by adhesive, insulation 3-5 minute, then carries out quick air cooling.After having inlayed, carry out cutting and polish.
Effect example one
Friction and wear behavior is tested: adopt homemade heavily loaded MG-2000 friction wear testing machine, load: 100N and 150N; Rotating speed is 500r/min, carries out pin-dish dry friction test at ambient temperature.The dish (lower sample) that testing machine is surrounded static pin (upper sample) by electric furnace of resistance type and rotated, sell by SS304 material, pin and dish clean with acetone on pretreatment afterwards.By strain gauge sensor continuous measurement friction torque in test.Friction factor is by the positive LOAD FOR of the friction torque measured and applying.The outer shroud of dish (bearing material) adopts embodiment 1 and example 2 to carry out self-lubricating solid body to inlay and all can obtain good friction effect, the method of preferred embodiment 1 carries out inlaying of self-lubricating solid body, inner ring is not carried out self-lubricating solid body and is inlayed, and carries out friction contrast.This friction process is because pin can serve anti-friction wear-resistant effect in the effect that experienced by solid lubrication medium, and inner ring is not because pin is through being inlaid with the surface of self-lubricating solid body, so its friction effect is similar to body material, see the grinding defect morphology in Fig. 4.As shown in Figure 4, pin-on-disc friction wear test carries out circular movement with the bearing material without self-lubricating solid body mosaic structure place (B place) to the bearing material with self-lubricating solid body mosaic structure place (A place) respectively under identical fretting wear condition.
Test has carried out the fretting wear of pin dish to matrix and the bearing material with mosaic structure respectively, A position in Fig. 4 is the grinding defect morphology worn and torn after 30 minutes under same load, very steady in friction process, without any noise, friction factor is on average about 0.03, wear extent is about about 0.017g after 30 minutes, as shown in Figure 5, and the B in Fig. 4 is the friction surface of matrix surface under the effect of 10 minutes 100N load without self-lubricating solid body mosaic structure, this shows, there is serious adhesive wear in its surface, wearing and tearing noise is strong and join rather unstable between pair, average friction coefficient rises to about 0.7, wear extent is after 10 min about about 0.53g, as shown in Figure 5.Research finds, in friction process, embedded self-lubricating agent serves obvious anti-friction wear-resistant effect.
Claims (9)
1. have a bearing material for self-lubricating property, it is characterized in that, described bearing material surface is provided with lubrication hole; Self-lubricating solid body is inlaid with in described lubrication hole; Described self-lubricating solid body is prepared by the raw material of following weight percentage: crystalline flake graphite 5%-8%, graphene oxide 1%-3%, molybdenum disulfide 5%-8%, soild oxide 15%-20%, and all the other are polytetrafluorethylepowder powder.
2. bearing material according to claim 1, is characterized in that, described self-lubricating solid body is mounted in the lubrication hole on described bearing material surface by epoxy resin-matrix compound binding agent; Described epoxy resin-matrix compound binding agent comprises the component of following weight percentage: polyimide 40%-45%, nano-oxide 8%-12%, plumbago 5%-8%, and all the other are epoxy resin.
3. bearing material according to claim 2, is characterized in that, described soild oxide adopts solid alumina or solid zirconia; Described nano-oxide adopts nano aluminium oxide or nano zircite.
4. bearing material according to claim 2, is characterized in that, the granularity of described teflon is 60 ~ 80 μm; The granularity of described crystalline flake graphite is 70-80 μm; The granularity of described nano-oxide is 20-50nm.
5. bearing material according to claim 2, is characterized in that, described lubrication hole is half through hole.
6. a preparation method for the arbitrary described bearing material of claim 2 to 5, is characterized in that, comprise the following steps:
(1) self-lubricating solid body preparation: the material powder getting described self-lubricating solid body mixes, and after drying, puts into cylindrical die and carries out compression molding; Air calcination process is carried out to molded member, from room temperature, is heated to 250-300 DEG C, insulation 30-50 min, be heated to 380-420 DEG C again, insulation 5-8 h, then cools to 270-320 DEG C, insulation 3-5 h, finally with the obtained described self-lubricating solid body of stove cooling;
(2) epoxy resin-matrix compound binding agent preparation: each component of extracting epoxy resin base compound binding agent mixes by weight percentage, for subsequent use;
(3) self-lubricating solid body is inlayed: at the spaced lubrication hole of bearing material surface Machining; The diameter of described lubrication hole diameter and described self-lubricating solid body matches; By described bearing material 100-120 DEG C of preheating, then the epoxy resin-matrix compound binding agent of preparation in described step (2) is added in described lubrication hole, in step (1), the self-lubricating solid body of preparation is embedded in lubrication hole by epoxy resin-matrix compound binding agent, insulation 3-5 minute, then carries out quick air cooling.
7. preparation method according to claim 6, is characterized in that, described self-lubricating solid body adopts half built-in structure, and inserted depth is the half of described bearing material thickness, and self-lubricating solid body exceeds described bearing material 1-2mm after embedding; After described self-lubricating solid body has embedded, carry out chip and polish.
8. preparation method according to claim 6, is characterized in that, the diameter of the cylindrical die in described step (1) is 7mm.
9. preparation method according to claim 6, is characterized in that, after described step (1) Raw powder mixes at 80-100 DEG C dry 1-3h.
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| CN105331210A (en) * | 2015-10-27 | 2016-02-17 | 江苏友成高分子材料科技有限公司 | Graphene modified teflon solid lubrication coating and preparation method thereof |
| CN106497056A (en) * | 2016-11-23 | 2017-03-15 | 常州碳润新材料科技有限公司 | A kind of easy to process, high temperature resistant and wear-resisting polyimides Graphene bearing and preparation method thereof |
| CN107189840A (en) * | 2017-06-05 | 2017-09-22 | 唐山市路北区有色铸件厂 | Inserted high temperature composite solid lubricant material of self-lubricating bearing and preparation method thereof |
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| CN109233177A (en) * | 2018-08-08 | 2019-01-18 | 燕山大学 | A kind of molybdenum disulfide/fluorinated graphene-ptfe composite and its preparation method and application |
| CN109296641A (en) * | 2018-11-21 | 2019-02-01 | 人本集团有限公司 | The method containing microporous polymer lubricating oil bearing of production |
| CN109880486A (en) * | 2019-03-06 | 2019-06-14 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | A kind of metal surface in-situ copolymerization multifunctional lubricating layer and preparation method thereof |
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| CN107189840A (en) * | 2017-06-05 | 2017-09-22 | 唐山市路北区有色铸件厂 | Inserted high temperature composite solid lubricant material of self-lubricating bearing and preparation method thereof |
| CN107460475A (en) * | 2017-07-06 | 2017-12-12 | 东南大学 | A kind of self-lubricating bearing and preparation method thereof |
| CN107460475B (en) * | 2017-07-06 | 2019-04-09 | 东南大学 | A kind of self-lubricating bearing and preparation method thereof |
| CN107570609A (en) * | 2017-08-18 | 2018-01-12 | 浙江长兴层颉机械制造有限公司 | A kind of plate class inlays graphite and its technique |
| CN108044092A (en) * | 2017-12-13 | 2018-05-18 | 柳州璞智科技有限公司 | A kind of robot self-lubricating material |
| CN108453262A (en) * | 2018-03-23 | 2018-08-28 | 南通强生石墨烯科技有限公司 | A kind of graphene powder metallurgy oiliness bearing and preparation method thereof |
| CN108659913A (en) * | 2018-06-21 | 2018-10-16 | 华北理工大学 | Fill cured type high temperature resistant bearing with solid lubricant and preparation method thereof |
| CN108659913B (en) * | 2018-06-21 | 2021-04-02 | 华北理工大学 | Filling and curing type high-temperature-resistant solid lubrication bearing and preparation method thereof |
| CN108547860A (en) * | 2018-06-26 | 2018-09-18 | 湖州职业技术学院 | A kind of self-lubricating thrust articulated bearing and its manufacturing method |
| CN109233177A (en) * | 2018-08-08 | 2019-01-18 | 燕山大学 | A kind of molybdenum disulfide/fluorinated graphene-ptfe composite and its preparation method and application |
| CN109296641A (en) * | 2018-11-21 | 2019-02-01 | 人本集团有限公司 | The method containing microporous polymer lubricating oil bearing of production |
| CN109880486A (en) * | 2019-03-06 | 2019-06-14 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | A kind of metal surface in-situ copolymerization multifunctional lubricating layer and preparation method thereof |
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Application publication date: 20151021 |
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