CN105385967A - Self-lubricating metal ceramic bearing with high bending resisting strength and preparing method of self-lubricating metal ceramic bearing - Google Patents
Self-lubricating metal ceramic bearing with high bending resisting strength and preparing method of self-lubricating metal ceramic bearing Download PDFInfo
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- CN105385967A CN105385967A CN201510743232.0A CN201510743232A CN105385967A CN 105385967 A CN105385967 A CN 105385967A CN 201510743232 A CN201510743232 A CN 201510743232A CN 105385967 A CN105385967 A CN 105385967A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/08—Iron group metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
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- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a self-lubricating metal ceramic bearing with high bending resisting strength. The bearing is prepared from raw materials including, by weight, 2.3-2.4 parts of ferric citrate, 3.1-3.5 parts of basic nickel carbonate, 1.1-1.3 parts of cuprous iodide, 25-30 parts of water, a proper amount of ammonium hydroxide, 2.9-3 parts of TiH2, 5-5.6 parts of TiC, 3-4 parts of Mo2C, 3-4 parts of WC, 0.9-1.1 parts of LaB6, 0.6-0.8 part of germanium dioxide, 0.6-0.8 part of nanometer boron fibers, 0.7-0.9 part of a lubricating agent, 1-1.1 parts of C, 8.6-9 parts of W, 6.1-6.3 parts of Mo, 3.1-3.3 parts of V and 65-66 parts of Fe. By means of the Mo2C, the WC, the LaB6, the germanium dioxide and the nanometer boron fibers, the thermal resistance and bending resisting strength of the bearing are improved, the bearing has the characteristics of high hardness, high strength and high tenacity, and cracking is prevented.
Description
Technical field
The present invention relates to sintering metal technical field of bearings, particularly relate to a kind of high-flexural strength self-lubricating metal-ceramic bearing and preparation method thereof.
Background technology
The development of modern science and technology rubs under the high temperature conditions to material, wear and tear and the requirement of lubricity more and more higher, in the urgent need to developing the high temperature lubricant and high temperature self-lubricating composite that adapt, thus the research and development of the self-lubricating composite that physical strength is high and tribological property is good are made to become the important research focus of tribological field.Metal or ceramic base self-lubricating material are that solid lubricant is joined as constituent element the matrix material formed in metal or ceramic matrix, and its tribological property depends on precipitation and the Dispersed precipitate of solid lubricant contained by matrix in friction process.But high sintering temperature can be born and not lose the solid lubricant of lubricating property little, and its nonunf ormity and destroy obdurability and the wear resistance that significantly can reduce matrix material to matrix is successional.Research shows, with powder sintered metal pottery for abrasion-resistant matrix, by means of the particle diameter of raw material powder, the quantity of particle shape or compacting pressure and pore-forming material carrys out the shape in adjusting hole porosity and hole, size and distribution, flood suitable solid lubricant, make it in high temperature friction process, realize self-lubricating by the effect of heat of friction to friction surface, with displace oil, fat is as the self-oiling bearing of lubricant, it is the effective way solving high temperature friction and wear and self-lubricating problem, under some special operation condition condition can be realized, as at high temperature, self-lubricating requirement under high wearing and tearing or corrosive environment.This type of material, under high temperature special operation condition, has a wide range of applications.Author is based on the requirement of spreading the micro hole construction of self-lubricating metal-ceramic sintered compact as self-oiling bearing matrix, obdurability and wear resistance, the gland sweat adopting sintering process to prepare several heterogeneity declines the sintered cermet of pore structure, and analyzes its performance.
" development of TiC/Fe-Cr-W-Mo-V system self-lubricating metal-ceramic bearing sintered compact " literary composition is based on spreading self-oiling bearing to the pore texture of sintered cermet, porosity and mechanical property requirements, with TiC/Fe-Cr-W-Mo-V powder mix for base-material, add a certain amount of pore-forming material and inertia dispersoid particle, vaccum sintering process is utilized to develop a kind of even pore distribution, and interconnect into the sintered cermet of network-like micro hole construction, and analyze its mechanical property by microhardness tester and hydraulic pressure trier, the microstructure of material with scanning electron microscope analysis, aperture structure.Result shows: when preparation TiC/Fe-Cr-W-Mo-V system minute aperture sintering metal spreads self-lubricating sintered body, add the TiH2 pore-forming material of 3%, and be inertia dispersoid particle with Al2O3, in 1230 DEG C of sintering, sintered compact even pore distribution can be made and interconnect, aobvious porosity, about 17%, meets diffusion self-oiling bearing to the requirement of pore texture, size and mechanical property.
But metal and ceramic phase directly sinter, its side effect can affect ceramic-metallic intensity, and then affects the work-ing life of bearing.The proportioning raw materials that article provides can not meet the requirement of strength to bearing in high loading situation, needs to improve.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of high-flexural strength self-lubricating metal-ceramic bearing and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of high-flexural strength self-lubricating metal-ceramic bearing, is made up of the raw material of following weight part: ironic citrate 2.3-2.4, basic nickel carbonate 3.1-3.5, cuprous iodide 1.1-1.3, water 25-30, ammoniacal liquor are appropriate, TiH
22.9-3, TiC5-5.6, Mo
2c3-4, WC3-4, LaB
60.9-1.1, germanium dioxide 0.6-0.8, nanometer boron fibre 0.6-0.8, lubricant 0.7-0.9, C1-1.1, W8.6-9, Mo6.1-6.3, V3.1-3.3, Fe65-66.
The preparation method of described high-flexural strength self-lubricating metal-ceramic bearing, comprises the following steps:
(1) in nitrogen atmosphere, ironic citrate, cuprous iodide are added to the water, are heated to 60-80 DEG C, under 90-120 rev/min, stir 1.5-1.8 hour, add TiC, Mo
2c, WC, LaB
6, germanium dioxide, nanometer boron fibre, stir 1-1.5 hour, then add basic nickel carbonate stir 3-4 hour, by ammoniacal liquor adjust ph to 6-6.5, be heated to 90-130 DEG C and keep this temperature continue stir 2-3 hour, obtain gel;
(2) gel is heated to 150-200 DEG C and keep this temperature until when not having smog to produce stop heating, then gained block is clayed into power, and by described powder in hydrogen atmosphere at 500-520 DEG C roasting 2-2.3 hour, obtain reduced powder;
(3) mixed with other remaining components by above-mentioned reduced powder, cold pressing after ball milling 4-4.5 hour, pressing force is 600-620MPa, sample carries out vacuum liquid-phase sintering after being shaped, sintering temperature is 1230-1235 DEG C, cools to room temperature with the furnace, to obtain final product after insulation 60min.
Advantage of the present invention is: the present invention uses ironic citrate, basic nickel carbonate to carry out coating modification to TiC, at ceramic phase surface first coated iron and nickel, ceramic particle is made to have magnetic, easily be combined with metallographic phase, reduce interfacial effect, improve the cohesive strength of ceramic phase and metallographic phase, the intensity of bearing and toughness are improved greatly; By using Mo
2c, WC, LaB
6, germanium dioxide, nanometer boron fibre, improve thermotolerance and the bending strength of bearing, make bearing have the characteristic of high rigidity, high strength, high tenacity, prevent fracture.
Embodiment
A kind of high-flexural strength self-lubricating metal-ceramic bearing, is made up of the raw material of following weight part (kilogram): ironic citrate 2.3, basic nickel carbonate 3.1, cuprous iodide 1.1, water 25, ammoniacal liquor are appropriate, TiH
22.9, TiC5, Mo
2c3, WC3, LaB
60.9, germanium dioxide 0.6, nanometer boron fibre 0.6, lubricant 0.7, C1, W8.6, Mo6.1, V3.1, Fe65.
The preparation method of described high-flexural strength self-lubricating metal-ceramic bearing, comprises the following steps:
(1) in nitrogen atmosphere, ironic citrate, cuprous iodide are added to the water, are heated to 60 DEG C, stir 1.5 hours under 90 revs/min, add TiC, Mo
2c, WC, LaB
6, germanium dioxide, nanometer boron fibre, stir 1 hour, then add basic nickel carbonate and stir 3 hours, by ammoniacal liquor adjust ph to 6, be heated to 90 DEG C and keep this temperature to continue stirring 2 hours, obtaining gel;
(2) gel be heated to 150 DEG C and keep this temperature until stop heating when not having smog to produce, then gained block being clayed into power, and by the roasting 2 hours at 500 DEG C in hydrogen atmosphere of described powder, obtaining reduced powder;
(3) mixed with other remaining components by above-mentioned reduced powder, ball milling was colded pressing after 4 hours, and pressing force is 600MPa, and sample carries out vacuum liquid-phase sintering after being shaped, and sintering temperature is 1230 DEG C, cools to room temperature with the furnace, to obtain final product after insulation 60min.
Experimental data: the hardness of material is 57.5HRC, crushing strength is 856MPa, and sintered density is 5.93g/cm
3, porosity 16.8%, metaloscope and HITACHIX-650 scanning electronic microscope are observed, and can find out that sintered compact mesoporosity is as sponge, network-like in the intercommunication hole being stretched over surface.
Claims (2)
1. a high-flexural strength self-lubricating metal-ceramic bearing, is characterized in that being made up of the raw material of following weight part: ironic citrate 2.3-2.4, basic nickel carbonate 3.1-3.5, cuprous iodide 1.1-1.3, water 25-30, ammoniacal liquor are appropriate, TiH
22.9-3, TiC5-5.6, Mo
2c3-4, WC3-4, LaB
60.9-1.1, germanium dioxide 0.6-0.8, nanometer boron fibre 0.6-0.8, lubricant 0.7-0.9, C1-1.1, W8.6-9, Mo6.1-6.3, V3.1-3.3, Fe65-66.
2. the preparation method of high-flexural strength self-lubricating metal-ceramic bearing according to claim 1, is characterized in that comprising the following steps:
(1) in nitrogen atmosphere, ironic citrate, cuprous iodide are added to the water, are heated to 60-80 DEG C, under 90-120 rev/min, stir 1.5-1.8 hour, add TiC, Mo
2c, WC, LaB
6, germanium dioxide, nanometer boron fibre, stir 1-1.5 hour, then add basic nickel carbonate stir 3-4 hour, by ammoniacal liquor adjust ph to 6-6.5, be heated to 90-130 DEG C and keep this temperature continue stir 2-3 hour, obtain gel;
(2) gel is heated to 150-200 DEG C and keep this temperature until when not having smog to produce stop heating, then gained block is clayed into power, and by described powder in hydrogen atmosphere at 500-520 DEG C roasting 2-2.3 hour, obtain reduced powder;
(3) mixed with other remaining components by above-mentioned reduced powder, cold pressing after ball milling 4-4.5 hour, pressing force is 600-620MPa, sample carries out vacuum liquid-phase sintering after being shaped, sintering temperature is 1230-1235 DEG C, cools to room temperature with the furnace, to obtain final product after insulation 60min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510743232.0A CN105385967A (en) | 2015-11-05 | 2015-11-05 | Self-lubricating metal ceramic bearing with high bending resisting strength and preparing method of self-lubricating metal ceramic bearing |
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| CN201510743232.0A CN105385967A (en) | 2015-11-05 | 2015-11-05 | Self-lubricating metal ceramic bearing with high bending resisting strength and preparing method of self-lubricating metal ceramic bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839035A (en) * | 2016-04-08 | 2016-08-10 | 苏州捷德瑞精密机械有限公司 | Nano-aluminum-oxide-based metal ceramic mold material and preparation method thereof |
| CN110925311A (en) * | 2019-12-10 | 2020-03-27 | 成都大学 | Surface self-lubricating metal ceramic sliding bearing and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101187401A (en) * | 2007-11-30 | 2008-05-28 | 洛阳轴研科技股份有限公司 | Bearing ball made of cermet |
| CN103537702A (en) * | 2013-11-08 | 2014-01-29 | 河源泳兴硬质合金有限公司 | Preparing methods of high-bending-strength nanometer WC-Co alloy powder and WC-Co alloy product |
-
2015
- 2015-11-05 CN CN201510743232.0A patent/CN105385967A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101187401A (en) * | 2007-11-30 | 2008-05-28 | 洛阳轴研科技股份有限公司 | Bearing ball made of cermet |
| CN103537702A (en) * | 2013-11-08 | 2014-01-29 | 河源泳兴硬质合金有限公司 | Preparing methods of high-bending-strength nanometer WC-Co alloy powder and WC-Co alloy product |
Non-Patent Citations (1)
| Title |
|---|
| 王砚军等: ""TiC/Fe-Cr-W-Mo-V系自润滑金属陶瓷轴承烧结体的研制"", 《轴承》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839035A (en) * | 2016-04-08 | 2016-08-10 | 苏州捷德瑞精密机械有限公司 | Nano-aluminum-oxide-based metal ceramic mold material and preparation method thereof |
| CN110925311A (en) * | 2019-12-10 | 2020-03-27 | 成都大学 | Surface self-lubricating metal ceramic sliding bearing and preparation method thereof |
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Application publication date: 20160309 |