CN115095604A - Powder metallurgy oil-retaining bearing and preparation method thereof - Google Patents
Powder metallurgy oil-retaining bearing and preparation method thereof Download PDFInfo
- Publication number
- CN115095604A CN115095604A CN202210831494.2A CN202210831494A CN115095604A CN 115095604 A CN115095604 A CN 115095604A CN 202210831494 A CN202210831494 A CN 202210831494A CN 115095604 A CN115095604 A CN 115095604A
- Authority
- CN
- China
- Prior art keywords
- powder
- oil
- bearing
- friction body
- powder metallurgy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000011159 matrix material Substances 0.000 claims abstract description 45
- 239000011148 porous material Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims description 72
- 238000005245 sintering Methods 0.000 claims description 45
- 239000003921 oil Substances 0.000 claims description 38
- 238000003825 pressing Methods 0.000 claims description 25
- 238000007654 immersion Methods 0.000 claims description 22
- 238000005255 carburizing Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 18
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 12
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 8
- 239000010687 lubricating oil Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- XIVNZHXRIPJOIZ-UHFFFAOYSA-N octadecanoic acid;zinc Chemical compound [Zn].CCCCCCCCCCCCCCCCCC(O)=O XIVNZHXRIPJOIZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 5
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 16
- 239000000758 substrate Substances 0.000 description 13
- 239000010949 copper Substances 0.000 description 12
- 239000007787 solid Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 238000005461 lubrication Methods 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000012071 phase Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/114—Making porous workpieces or articles the porous products being formed by impregnation
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/08—Attachment of brasses, bushes or linings to the bearing housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/14—Special methods of manufacture; Running-in
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2220/00—Shaping
- F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding
- F16C2223/12—Hardening, e.g. carburizing, carbo-nitriding with carburizing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Powder Metallurgy (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention relates to the technical field of mechanical parts and discloses a powder metallurgy oil-retaining bearing and a preparation method thereof. The beneficial effects of the invention are as follows: through the pore structures of different areas of the powder metallurgy bearing, the bearing area of the outer layer matrix of the bearing is high in density and low in porosity, and the area of the inner layer friction body is low in density and high in porosity, so that the powder metallurgy oil-retaining bearing with excellent bearing performance, lubricating performance and wear performance is obtained, and the powder metallurgy oil-retaining bearing can be used under a heavy-load working condition.
Description
Technical Field
The invention relates to the technical field of mechanical parts, relates to a powder metallurgy oil-retaining bearing and a preparation method thereof, and particularly relates to a powder metallurgy oil-retaining bearing for heavy-load working conditions and a preparation method thereof.
Background
The parts of oil cylinder ear holes, working device hinge points and the like of the excavating machinery and the loading machinery use sliding bearings to realize the relative sliding with the dual pin shafts, thereby realizing different operation actions. When carrying out heavy load operation, hinge point position stress is very high, requires that slide bearing possesses high bearing capacity, and meanwhile, along with user's promotion to the non-maintaining demand, requires that slide bearing possesses excellent self-lubricating ability.
In order to solve the requirements, the sliding bearings applied to the heavy-load working condition at present mainly comprise a copper alloy embedded solid lubrication bearing and an oil pocket type steel sliding bearing, the copper alloy embedded solid lubrication bearing has excellent self-lubricating performance and can adapt to the heavy-load working condition, but the wear resistance is insufficient, and the price is high; the oil pocket type steel sliding bearing has excellent wear resistance and low price, but the self-lubricating property is insufficient, and the phenomenon of locking with a dual shaft can be caused when the lubrication is not timely performed. The two solutions described above have drawbacks for addressing the application requirements.
The powder metallurgy oil-containing material is a material which is prepared by pressing and sintering metal powder raw materials to form a porous structure, and then storing lubricating oil in pores of the porous material through oil immersion treatment, so that the material with low friction coefficient and self-lubricating property is obtained. It is often used to make friction pair parts such as slide block and sliding bearing. The powder metallurgy oil-containing material generates heat and siphonage in the process of friction movement with the dual pair, so that lubricating oil in the material is promoted to fill the clearance of the friction pair, and the anti-friction effect is achieved.
The material structure of the existing powder metallurgy oil-retaining bearing is characterized by being a uniform porous structure material, and the preparation process flow of the existing powder metallurgy oil-retaining bearing usually comprises the following steps: mixing materials, pressing, sintering, carburizing, oil soaking and machining. On the material components, the design components are uniformly mixed, and the material components of different areas of the bearing are basically the same. The powder metallurgy oil-retaining bearing produced by the prior art is a porous antifriction bearing with uniform material, uniform structure and uniform performance, and is suitable for medium-low load working conditions.
The conventional powder metallurgy oil-retaining bearing has good self-lubricating property and relatively low price, but the bearing capacity is reduced due to the integral porous structure of the material, so that the application of the conventional powder metallurgy oil-retaining bearing in heavy-load working conditions is limited, and the conventional powder metallurgy oil-retaining bearing is usually used in medium-low load working conditions.
Disclosure of Invention
The invention provides a powder metallurgy oil-retaining bearing for heavy-load working conditions and a preparation method thereof, aiming at the problem that the bearing capacity of the powder metallurgy oil-retaining bearing in the prior art is insufficient, and the powder metallurgy oil-retaining bearing is a 'compact outside and loose inside' structure-differentiated powder metallurgy oil-retaining bearing, can be used under the heavy-load working conditions and has excellent self-lubricating capacity.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the invention provides a powder metallurgy oil-retaining bearing, which comprises a base body and a friction body arranged in the inner layer of the base body, wherein the base body and the friction body are both provided with pores, lubricating oil is infiltrated into the pores, and the pore size of the base body is smaller than that of the friction body.
With reference to the first aspect, further, the friction body and the base body are in interference fit, and the interference range is 0.05mm to 0.1 mm.
With reference to the first aspect, further, the ratio of the wall thickness of the base body to the wall thickness of the friction body ranges from 3:2 to 3:1, and preferably the ratio of the wall thickness of the base body to the wall thickness of the friction body ranges from 2:1, which can ensure the bearing capacity of the bearing and also give consideration to the self-lubricating capacity of the friction body; if the volume proportion of the friction body is too large, the bearing capacity of the matrix is weakened, and if the volume proportion of the friction body is too small, the self-lubricating capacity of the friction body is reduced.
With reference to the first aspect, further, the matrix comprises, in weight percent: 5.0 to 8.0 percent of electrolytic Cu powder, 0.1 to 0.3 percent of chromium powder, 0.2 to 0.4 percent of tungsten powder, 0.7 to 0.9 percent of graphite, 0.1 to 0.3 percent of zinc stearate and the balance of reduced Fe powder; the friction body comprises the following components in percentage by weight: 18.0 to 20.0 percent of electrolytic Cu powder, 0.4 to 0.6 percent of graphite, 1.0 to 1.5 percent of tungsten carbide powder, 1.0 to 1.5 percent of zinc stearate, 1.5 to 2.5 percent of molybdenum disulfide powder and the balance of reduced Fe powder.
The addition of the chromium powder and the tungsten powder has the functions of partially dissolving in solid and Fe phase in the sintering process in the preparation method, strengthening the matrix and increasing the bearing capacity of the matrix; the part and the carbon element form a part hardening phase to enhance the wear resistance of the matrix. The tungsten powder is used in the matrix, so that the bearing capacity is enhanced, and the improvement of the wear resistance of the matrix is not the key point; the friction body can greatly improve the wear resistance by using the tungsten carbide powder particles.
The molybdenum disulfide powder is a solid-phase friction reducer, and the self-lubricating capability of the molybdenum disulfide powder can be enhanced after the molybdenum disulfide powder is added into a friction body.
Compared with the bearing in the prior art, the oil-retaining bearing reduces the content of copper powder in the matrix component, because copper is generally a soft phase and the bearing capacity of the matrix is reduced due to more content of copper; the content of zinc stearate in the matrix component is reduced because the zinc stearate has pore-forming effect and the porosity is increased due to the high content of zinc stearate, so that the matrix reduces the content of copper powder and zinc stearate.
The oil-retaining bearing contains graphite, and has the functions of improving the strength by sintering and solid dissolving in iron, forming carbide with alloy elements and reducing the friction coefficient of the material by serving as an antifriction component. In the friction body, the amount of zinc stearate is increased (the porosity is improved), molybdenum disulfide is added, the purpose is to enhance the self-lubricating property of the friction body, tungsten carbide is a hard wear-resistant phase, the friction body is added with tungsten carbide particles, the wear resistance of the friction body can be greatly improved, and the content of graphite is properly reduced due to the existence of the tungsten carbide and the molybdenum disulfide.
With reference to the first aspect, further, the particle size of the reduced Fe powder is-200 to 300 mesh; the granularity of the electrolytic Cu powder is-200 meshes to 300 meshes; the granularity of the chromium powder, the tungsten powder, the graphite and the molybdenum disulfide powder is-300 meshes to 400 meshes; the granularity of the tungsten carbide powder and the stearic acid zinc powder is-400 meshes to 500 meshes.
The oil-containing bearing has the advantages that the component granularity design follows the coarse granularity of basic components, namely coarse granularity of alloy and antifriction components, pore forming and fine granularity of wear-resistant components, iron powder and Cu powder are used as basic material components to build material skeleton, the basic space of porous material is ensured, the alloy and antifriction components are thinner than the basic components, and the space is filled; the carbide powder and the zinc stearate powder are finest, and the formation of fine and uniformly dispersed pores after sintering is mainly considered, so that the pores of the porous material are fine and uniform, the self-lubricating property is uniform after vacuum oil immersion, and the fine and dispersed carbide hard particle phase is more favorable for improving the wear resistance of the friction body.
In a second aspect, the invention provides a method for preparing a powder metallurgy oil-retaining bearing, which comprises the following steps:
mixing materials: weighing the components of the base body and the friction body, and respectively putting the weighed components into a ball mill for ball milling and mixing for 1-3 h; when discharging, the components are put in batches, the powder of each component is divided into equal parts (such as 3-5 parts), and each batch of powder is put into a mixing device according to the same sequence to obtain the corresponding matrix powder and friction body powder.
Pressing: respectively pressing the matrix powder and the friction body powder to obtain a corresponding matrix compact and a corresponding friction body compact;
pre-sintering a base body: pre-sintering the substrate pressed compact to harden the substrate pressed compact, wherein the pre-sintering temperature is 300-400 ℃, and the pre-sintering time is 1.5-2.5 h;
assembling a base body and a friction body: and assembling the friction body pressed compact and the pre-sintered base body pressed compact to obtain a bearing pre-sintered blank, and cleaning an assembly surface of the base body and the friction body before assembling to ensure the bonding strength after subsequent sintering.
And (3) sintering the assembly: putting the bearing pre-sintered blank into a sintering furnace for sintering, wherein the sintering atmosphere is hydrogen, the sintering temperature is 1100-1150 ℃, and the sintering time is 1-2 h, so as to obtain a bearing sintered body;
carburizing: carrying out carburizing treatment on the bearing sintered body in a carburizing furnace, wherein the carburizing time is 1-2 h, and the carburizing temperature is 920-940 ℃;
oil immersion in vacuum: carrying out oil immersion treatment on the bearing sintered body after carburization treatment in vacuum oil immersion equipment, wherein the oil immersion temperature is 80-120 ℃, and the oil immersion time is 0.5-1.5 h, so as to obtain an oil-retaining bearing;
machining and shaping: and machining a ring groove on the oil-containing bearing and correcting the dimensional accuracy of other geometric elements to obtain a finished oil-containing bearing product.
With reference to the second aspect, further, in the pressing step, the mixed matrix powder is placed in a mold, a matrix green compact is prepared by using a powder metallurgy press, and bidirectional stamping is adopted during pressing; and (3) putting the mixed friction body powder into a die, preparing a friction body pressed blank by using a powder metallurgy press, and pressing by using bidirectional stamping.
With reference to the second aspect, further, in the step of compressing, different densities are used to compress the matrix powder and the friction body powder respectively, and the green compact density of the matrix powder is greater than that of the friction body powder.
With reference to the second aspect, further, the pressing pressure of the matrix powder is 550MPa to 650MPa, and the green density is 6.8g/cm 3 ～7.2g/cm 3 (ii) a The pressing pressure of the friction body powder is 300MPa to 400MPa, and the pressed compact density is 5.8g/cm 3 ～6.2g/cm 3 . The method adopts different compact densities to obtain the matrixes and the friction bodies with different pore structures and sizes, namely the bearing area of the outer-layer matrix of the bearing has high density and low porosity, and the area of the inner-layer friction body has low density and high porosity.
With reference to the second aspect, the friction body pressed compact and the substrate pre-sintered compact are in an interference fit relationship, and the interference range is 0.05mm to 0.1 mm.
Compared with the prior art, the invention provides a powder metallurgy oil-retaining bearing for heavy-load working conditions, which has the following beneficial effects:
(1) according to the oil-retaining bearing, through the pore structures of different areas of the powder metallurgy bearing, the bearing area of the outer layer matrix of the bearing is high in density and low in porosity, and the area of the inner layer friction body is low in density and high in porosity, so that the powder metallurgy oil-retaining bearing with excellent bearing performance, lubricating performance and wear performance is obtained, and the powder metallurgy oil-retaining bearing can be used under a heavy-load working condition.
(2) According to the oil-retaining bearing, the base body area adopts high-strength components and a high-density low-porosity structure, and the base body is added to enhance alloy components so as to improve the bearing capacity of the bearing; the oil-retaining bearing is characterized in that a solid lubricating component is added into a friction area of the oil-retaining bearing, the friction area of the oil-retaining bearing adopts a low-density high-porosity structure to improve the self-lubricating capability of the bearing, and meanwhile, wear-resistant particles are added to improve the wear-resistant performance of the oil-retaining bearing, so that the oil-retaining bearing can be used under a heavy-load working condition and has excellent self-lubricating capability.
(3) According to the preparation method of the oil-retaining bearing, in the aspect of components, elements such as chromium and tungsten are added to a bearing matrix to enhance the matrix strength, the friction body of the inner layer of the bearing contains substances with anti-wear characteristics such as molybdenum disulfide to further improve the self-lubricating property, and tungsten carbide particles are added to enhance the wear resistance. The oil-retaining bearing matrix area adopts a high-strength component, high-density and low-porosity structure to improve the bearing capacity of the bearing and adapt to heavy-load working conditions; solid lubricating components are added into the friction area of the oil-containing bearing, and a low-density high-porosity structure is adopted to store more lubricating oil so as to improve the self-lubricating capability of the bearing.
(4) Compared with a copper-based inlaid solid lubrication bearing which is used in a heavy-load working condition and has a self-lubricating characteristic, the preparation method of the oil-containing bearing has the advantages that after carburization treatment, the hardness of the inner surface can reach the level of the hardness of high-force brass, the friction performance reaches the level of the copper-based inlaid solid lubrication bearing due to the improvement of the oil content of the inner surface part of the bearing, the bearing capacity reaches the level of the copper-based inlaid solid lubrication bearing due to the improvement of the density of a matrix, the copper-based inlaid solid lubrication bearing can be used for the heavy-load working condition and can meet the self-lubricating requirement instead of the copper-based inlaid solid lubrication bearing, and the use cost is lower than that of the copper-based inlaid solid lubrication bearing.
(5) According to the structural design and the component design, compared with the existing powder metallurgy oil-retaining bearing, the obtained oil-retaining bearing has higher bearing capacity and better self-lubricating property.
Drawings
FIG. 1 is a schematic cross-sectional structural view of a powder metallurgy oil retaining bearing of the present invention.
The reference numerals in the figures have the meaning: 1-a substrate; 2-rubbing body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may also include different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "up," "down," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the figures, which are based on the orientations and positional relationships shown in the figures, and are used for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the scope of the invention.
Example 1
As shown in fig. 1, the oil-retaining bearing of the present invention includes a base 1 and a friction body 2 disposed in an inner layer of the base 1, wherein the base 1 and the friction body 2 are both provided with pores, the pores are impregnated with lubricating oil, and the size of the pores of the base 1 is smaller than that of the pores of the friction body 2. The friction body 2 and the base body 1 are in interference fit, and the interference magnitude is 0.05 mm-0.1 mm. The ratio of the wall thickness of the base body 1 to the wall thickness of the friction body 2 is 2: 1.
The bearing matrix 1 comprises the following components in percentage by weight: 6.0 percent, granularity of-200 meshes, chromium powder: 0.2%, particle size-300 mesh, tungsten powder: 0.3%, particle size-300 mesh, graphite: 0.8%, particle size-300 mesh, zinc stearate: 0.2 percent of granularity-400 meshes, and the balance of reduced Fe powder with granularity-200 meshes;
the bearing friction body 2 comprises the following components in percentage by weight: 18.0%, particle size-200 mesh, graphite: 0.6%, -300 mesh, tungsten carbide powder: 1.0%, particle size-400 mesh, zinc stearate: 1.5 percent, granularity of-400 meshes and MoS of molybdenum disulfide powder 2 2.5 percent, granularity of-300 meshes and the balance of reduced Fe powder, granularity of-200 meshes.
The preparation method of the oil-retaining bearing comprises the following steps:
1) weighing the components of the bearing matrix 1 and the friction body 2 according to the weight percentage, and respectively putting the components into a ball mill for ball milling and mixing for 2 hours after weighing; when discharging, all the components are put in batches, the batch rule is that powder of all the components is divided into 3 equal parts, and each batch of powder is put into a mixing device according to the same sequence;
2) putting the mixed bearing matrix powder into a die, preparing a matrix pressed compact by using a powder metallurgy press, wherein the pressing pressure is 600MPa, the two-way punching is adopted during pressing, and the density of the pressed compact is 7.0g/cm 3 ；
3) Putting the mixed friction body powder into a die, preparing a friction body pressed compact by using a powder metallurgy press, wherein the pressing pressure is 350MPa, two-way stamping is adopted during pressing, and the density of the pressed compact is 6.0g/cm 3 ；
4) Pre-sintering the substrate pressed compact to harden the substrate pressed compact, wherein the pre-sintering temperature is 350 ℃, and the pre-sintering time is 2.0 h;
5) assembling the friction body pressed compact and the substrate pressed compact to form a bearing pre-sintered blank, and cleaning the assembly surface of the substrate and the friction body before assembling to ensure the bonding strength after subsequent sintering; the assembly interference of the base body pre-sintered compact and the friction body pressed compact is 0.08 mm;
6) putting the pre-sintered body blank into a sintering furnace for sintering, wherein the sintering atmosphere is hydrogen, the sintering temperature is 1120 ℃, and the sintering time is 1.5 h;
7) carrying out carburizing treatment on the powder metallurgy bearing sintered body in a carburizing furnace, wherein the carburizing time is 1.5h, and the carburizing temperature is 920 ℃;
8) performing oil immersion treatment on the carburized powder metallurgy bearing in vacuum oil immersion equipment, wherein the oil immersion temperature is 100 ℃, and the oil immersion time is 1 h;
9) machining and shaping: and machining a ring groove on the powder metallurgy oil-retaining bearing after oil immersion, and correcting the dimensional accuracy of other geometric elements to obtain a finished product of the powder metallurgy oil-retaining bearing.
The powder metallurgy oil-impregnated bearing prepared in example 1 was subjected to performance testing to obtain the data of table 1.
Example 2
Example 2 differs from example 1 in that: the friction body has different components and different preparation methods of the matrix component and the friction body, and specifically comprises the following steps:
the bearing matrix 1 comprises the following components in percentage by weight: 8.0%, granularity-200 meshes, chromium powder: 0.2%, particle size-300 mesh, tungsten powder: 0.3%, particle size-300 mesh, graphite: 0.8%, particle size-300 mesh, zinc stearate: 0.3 percent of granularity-400 meshes, and the balance of reduced Fe powder with granularity-200 meshes;
the bearing friction body 2 comprises the following components in percentage by weight: 20.0%, particle size-200 mesh, graphite: 0.4%, -300 mesh, tungsten carbide powder: 1.0%, particle size-400 mesh, zinc stearate: 1.0 percent, granularity of-400 meshes and MoS of molybdenum disulfide powder 2 2.0 percent, granularity of-300 meshes and the balance of reduced Fe powder, granularity of-200 meshes.
The preparation method of the oil-retaining bearing comprises the following steps:
1) weighing the components of the bearing substrate and the friction body in percentage by weight, and respectively putting the components into a ball mill for ball milling and mixing for 2 hours; when discharging, all the components are put in batches, the batch rule is that powder of all the components is divided into 3 equal parts, and each batch of powder is put into a mixing device according to the same sequence;
2) putting the mixed bearing matrix powder into a die, preparing a matrix pressed compact by using a powder metallurgy press, wherein the pressing pressure is 650MPa, the pressing is carried out by using two-way stamping, and the density of the pressed compact is 7.15g/cm 3 ；
3) Putting the mixed friction body powder into a die, preparing a friction body pressed compact by using a powder metallurgy press, wherein the pressing pressure is 400MPa, the pressing is carried out by using two-way stamping, and the density of the pressed compact is 6.1g/cm 3 ；
4) Pre-sintering the substrate pressed compact to harden the substrate pressed compact, wherein the pre-sintering temperature is 350 ℃, and the pre-sintering time is 2.0 h;
5) assembling the friction body pressed compact and the substrate pressed compact to form a bearing pre-sintered blank, and cleaning an assembly surface of the substrate and the friction body before assembling to ensure the bonding strength after subsequent sintering; the assembly interference of the base body pre-sintered compact and the friction body pressed compact is 0.08 mm;
6) putting the pre-sintered body blank into a sintering furnace for sintering, wherein the sintering atmosphere is hydrogen, the sintering temperature is 1140 ℃, and the sintering time is 1.0 h;
7) carrying out carburizing treatment on the powder metallurgy bearing sintered body in a carburizing furnace, wherein the carburizing time is 1.5h, and the carburizing temperature is 920 ℃;
8) performing oil immersion treatment on the carburized powder metallurgy bearing in vacuum oil immersion equipment, wherein the oil immersion temperature is 100 ℃, and the oil immersion time is 1 h;
9) machining and shaping: and machining a ring groove on the powder metallurgy oil-retaining bearing after oil immersion, and correcting the dimensional accuracy of other geometric elements to obtain a finished product of the powder metallurgy oil-retaining bearing.
The performance test of the powder metallurgy oil-retaining bearing prepared in the example 2 is carried out, and the data of the table 1 is obtained, and the table 1 is the comparison of the performance data of the example 1, the example 2 and the conventional powder metallurgy oil-retaining bearing.
TABLE 1
As can be seen from table 1, the oil-retaining bearing designed by using the structure and the preparation method of the present invention has higher bearing capacity, more excellent self-lubricating property and wear resistance compared to the powder metallurgy oil-retaining bearing in the prior art.
It should be noted that, in the present application, relational terms such as first and second, and the like are used solely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A powder metallurgy oil retaining bearing is characterized in that: the friction body is arranged on the inner layer of the base body, the base body and the friction body are both provided with pores, lubricating oil is infiltrated into the pores, and the pore size of the base body is smaller than that of the friction body.
2. The powder metallurgy oil-retaining bearing according to claim 1, wherein: the friction body and the base body are in interference fit.
3. The powder metallurgy oil-retaining bearing according to claim 1, wherein: the ratio of the thickness of the matrix wall to the thickness of the friction body ranges from 3:2 to 3: 1.
4. The powder metallurgy oil-retaining bearing according to claim 1, wherein: the base body comprises the following components in percentage by weight: 5.0 to 8.0 percent of electrolytic Cu powder, 0.1 to 0.3 percent of chromium powder, 0.2 to 0.4 percent of tungsten powder, 0.7 to 0.9 percent of graphite, 0.1 to 0.3 percent of zinc stearate and the balance of reduced Fe powder; the friction body comprises the following components in percentage by weight: 18.0 to 20.0 percent of electrolytic Cu powder, 0.4 to 0.6 percent of graphite, 1.0 to 1.5 percent of tungsten carbide powder, 1.0 to 1.5 percent of zinc stearate, 1.5 to 2.5 percent of molybdenum disulfide powder and the balance of reduced Fe powder.
5. The powder metallurgy oil-retaining bearing according to claim 4, wherein: the granularity of the reduced Fe powder is-200 meshes-300 meshes; the granularity of the electrolytic Cu powder is-200 meshes to 300 meshes; the granularity of the chromium powder, the tungsten powder, the graphite and the molybdenum disulfide powder is-300 meshes to 400 meshes; the granularity of the tungsten carbide powder and the stearic acid zinc powder is-400 meshes to 500 meshes.
6. A method for manufacturing a powder metallurgy oil-retaining bearing, characterized in that the powder metallurgy oil-retaining bearing according to any one of claims 1 to 5 is manufactured, comprising the steps of:
mixing materials: respectively weighing and mixing materials according to the components of the matrix and the friction body to obtain corresponding matrix powder and friction body powder;
pressing: respectively pressing the matrix powder and the friction body powder to obtain a corresponding matrix compact and a corresponding friction body compact;
pre-sintering a base body: pre-sintering the base body pressed compact to harden the base body pressed compact, wherein the pre-sintering temperature is 300-400 ℃, and the pre-sintering time is 1.5-2.5 h;
assembling a base body and a friction body: and assembling the friction body pressed compact and the pre-sintered matrix pressed compact to obtain a bearing pre-sintered blank.
And (3) sintering of the assembly: putting the bearing pre-sintered blank into a sintering furnace for sintering, wherein the sintering atmosphere is hydrogen, the sintering temperature is 1100-1150 ℃, and the sintering time is 1-2 h, so as to obtain a bearing sintered body;
carburizing: carrying out carburizing treatment on the bearing sintered body in a carburizing furnace, wherein the carburizing time is 1-2 h, and the carburizing temperature is 920-940 ℃;
oil immersion in vacuum: carrying out oil immersion treatment on the bearing sintered body after carburization treatment in vacuum oil immersion equipment, wherein the oil immersion temperature is 80-120 ℃, and the oil immersion time is 0.5-1.5 h, so as to obtain an oil-retaining bearing;
machining and shaping: and machining a ring groove on the oil-containing bearing and correcting the dimensional accuracy of other geometric elements to obtain a finished oil-containing bearing product.
7. The method of manufacturing a powder metallurgy oil-retaining bearing according to claim 6, characterized in that: in the pressing step, mixed matrix powder is placed into a die, a matrix pressed blank is prepared by adopting a powder metallurgy press, and bidirectional stamping is adopted during pressing; and putting the mixed friction body powder into a die, preparing a friction body pressed compact by using a powder metallurgy press, and pressing by using bidirectional stamping.
8. The method of manufacturing a powder metallurgy oil-retaining bearing according to claim 6, characterized in that: in the pressing step, the matrix powder and the friction body powder are respectively pressed by adopting different densities, and the pressed blank density of the matrix powder is greater than that of the friction body powder.
9. The method of manufacturing a powder metallurgy oil-retaining bearing according to claim 8, characterized in thatIs characterized in that: the pressing pressure of the matrix powder is 550 MPa-650 MPa, and the pressed compact density is 6.8g/cm 3 ～7.2g/cm 3 (ii) a The pressing pressure of the friction body powder is 300MPa to 400MPa, and the pressed compact density is 5.8g/cm 3 ～6.2g/cm 3 。
10. The method of manufacturing a powder metallurgy oil-retaining bearing according to claim 6, characterized in that: the friction body pressed compact and the base body pre-sintering compact are in interference fit, and the interference magnitude is 0.05 mm-0.1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210831494.2A CN115095604A (en) | 2022-07-15 | 2022-07-15 | Powder metallurgy oil-retaining bearing and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210831494.2A CN115095604A (en) | 2022-07-15 | 2022-07-15 | Powder metallurgy oil-retaining bearing and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115095604A true CN115095604A (en) | 2022-09-23 |
Family
ID=83296852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210831494.2A Pending CN115095604A (en) | 2022-07-15 | 2022-07-15 | Powder metallurgy oil-retaining bearing and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115095604A (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8904487D0 (en) * | 1988-03-03 | 1989-04-12 | Kikuchi Isamu | Sintered alloy for oil-retaining bearing and method for manufacturing the sintered alloy |
| CN2330828Y (en) * | 1998-05-29 | 1999-07-28 | 胡长安 | Powder metallurgy non-oil lubricating bearing |
| US6340534B1 (en) * | 1997-07-03 | 2002-01-22 | Ks Gleitlager Gmbh | Wrapped slide bearing bushing |
| US20050242156A1 (en) * | 2004-04-29 | 2005-11-03 | Thomas Jabs | DLC (diamond-like carbon) hard coating on copper based material for bearings |
| CN101077644A (en) * | 2006-05-26 | 2007-11-28 | 南京盛润科技有限公司 | Gradient compound material and preparation method |
| CN101649858A (en) * | 2009-08-20 | 2010-02-17 | 浙江中达轴承有限公司 | Steel-based copper alloy dual-metal sliding bearing and preparation method thereof |
| CN103537668A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy bearing material and preparation method thereof |
| TW201410360A (en) * | 2012-09-13 | 2014-03-16 | Asia Vital Components Co Ltd | Bearing forming method |
| CN103909270A (en) * | 2013-12-19 | 2014-07-09 | 浙江中达精密部件股份有限公司 | High-performance powder metallurgy oil-containing bearing and manufacturing method thereof |
| CN106041099A (en) * | 2016-06-23 | 2016-10-26 | 合肥工业大学 | High-strength antifriction double-layered iron base powder metallurgy material and preparation method thereof |
| CN106041096A (en) * | 2016-06-27 | 2016-10-26 | 滁州帝邦科技有限公司 | Preparation method for wear-resisting and corrosion-resisting bearing bush for water-cooling box |
| WO2018215101A1 (en) * | 2017-05-26 | 2018-11-29 | Ks Gleitlager Gmbh | Sliding bearing element for engine applications |
| CN111001813A (en) * | 2019-12-28 | 2020-04-14 | 合肥波林新材料股份有限公司 | High-antifriction iron-based vulcanized powder metallurgy oil-retaining bearing material and preparation method and application thereof |
| CN112030039A (en) * | 2019-06-04 | 2020-12-04 | 肯纳金属公司 | Composite cladding and use thereof |
| EP3825119A1 (en) * | 2019-11-19 | 2021-05-26 | Miba Gleitlager Austria GmbH | Multilayer sliding bearing element |
| CN114082960A (en) * | 2021-11-11 | 2022-02-25 | 江苏徐工工程机械研究院有限公司 | Preparation method of shaft sleeve, shaft sleeve and excavator |
| CN114309615A (en) * | 2021-12-17 | 2022-04-12 | 合肥波林新材料股份有限公司 | Iron-based double-layer sintered material and preparation method thereof |
-
2022
- 2022-07-15 CN CN202210831494.2A patent/CN115095604A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8904487D0 (en) * | 1988-03-03 | 1989-04-12 | Kikuchi Isamu | Sintered alloy for oil-retaining bearing and method for manufacturing the sintered alloy |
| US6340534B1 (en) * | 1997-07-03 | 2002-01-22 | Ks Gleitlager Gmbh | Wrapped slide bearing bushing |
| CN2330828Y (en) * | 1998-05-29 | 1999-07-28 | 胡长安 | Powder metallurgy non-oil lubricating bearing |
| US20050242156A1 (en) * | 2004-04-29 | 2005-11-03 | Thomas Jabs | DLC (diamond-like carbon) hard coating on copper based material for bearings |
| CN101077644A (en) * | 2006-05-26 | 2007-11-28 | 南京盛润科技有限公司 | Gradient compound material and preparation method |
| CN101649858A (en) * | 2009-08-20 | 2010-02-17 | 浙江中达轴承有限公司 | Steel-based copper alloy dual-metal sliding bearing and preparation method thereof |
| TW201410360A (en) * | 2012-09-13 | 2014-03-16 | Asia Vital Components Co Ltd | Bearing forming method |
| CN103537668A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy bearing material and preparation method thereof |
| CN103909270A (en) * | 2013-12-19 | 2014-07-09 | 浙江中达精密部件股份有限公司 | High-performance powder metallurgy oil-containing bearing and manufacturing method thereof |
| CN106041099A (en) * | 2016-06-23 | 2016-10-26 | 合肥工业大学 | High-strength antifriction double-layered iron base powder metallurgy material and preparation method thereof |
| CN106041096A (en) * | 2016-06-27 | 2016-10-26 | 滁州帝邦科技有限公司 | Preparation method for wear-resisting and corrosion-resisting bearing bush for water-cooling box |
| WO2018215101A1 (en) * | 2017-05-26 | 2018-11-29 | Ks Gleitlager Gmbh | Sliding bearing element for engine applications |
| CN112030039A (en) * | 2019-06-04 | 2020-12-04 | 肯纳金属公司 | Composite cladding and use thereof |
| EP3825119A1 (en) * | 2019-11-19 | 2021-05-26 | Miba Gleitlager Austria GmbH | Multilayer sliding bearing element |
| CN112901661A (en) * | 2019-11-19 | 2021-06-04 | 米巴滑动轴承奥地利有限公司 | Multi-layer plain bearing element |
| CN111001813A (en) * | 2019-12-28 | 2020-04-14 | 合肥波林新材料股份有限公司 | High-antifriction iron-based vulcanized powder metallurgy oil-retaining bearing material and preparation method and application thereof |
| CN114082960A (en) * | 2021-11-11 | 2022-02-25 | 江苏徐工工程机械研究院有限公司 | Preparation method of shaft sleeve, shaft sleeve and excavator |
| CN114309615A (en) * | 2021-12-17 | 2022-04-12 | 合肥波林新材料股份有限公司 | Iron-based double-layer sintered material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101533458B1 (en) | Sliding bearing having improved consume resistivity and manufacturing method thereof | |
| JP5247329B2 (en) | Iron-based sintered bearing and manufacturing method thereof | |
| EP2185303B9 (en) | Wear resistant lead free alloy bushing and method of making | |
| CN101251152B (en) | Oil impregnated sintered bearing and method for manufacturing same | |
| EP2087250B1 (en) | Bearing having improved consume resistivity and manufacturing method thereof | |
| EP1975260B1 (en) | Copper base sintered slide member | |
| EP2778243A1 (en) | Iron based sintered sliding member and method for producing the same | |
| EP2781283A1 (en) | Iron base sintered sliding member and method for producing same | |
| CN102913555A (en) | Powder metallurgical composite oil-containing bearing and manufacturing method thereof | |
| JP2756407B2 (en) | Sliding material excellent in corrosion resistance and abrasion resistance and method for producing the same | |
| US10718379B2 (en) | Slide member and method for manufacturing same | |
| JP2009079136A (en) | Copper-based, oil-impregnated and sintered sliding member | |
| JP3613569B2 (en) | Composite metal powder for sintered bearing and sintered oil-impregnated bearing | |
| CN105695872A (en) | Pre-diffusion bonding powder for powder metallurgy, manufacturing method thereof and method for manufacturing oil bearing through pre-diffusion bonding powder | |
| CN115095604A (en) | Powder metallurgy oil-retaining bearing and preparation method thereof | |
| KR101699189B1 (en) | Sliding bearing assembly | |
| EP4112208A1 (en) | Bushing manufacturing method, bushing, and excavator | |
| CN107855517A (en) | A kind of oiliness bearing powdered metallurgical material and preparation method thereof | |
| JPH10184324A (en) | Manufacture of iron-based sintered alloy made valve seat and iron-based sintered alloy made valve seat | |
| JP2001107162A (en) | Bronze series sintered alloy, bearing using the same and their producing method | |
| US6833018B1 (en) | Powder metal materials including glass | |
| JP3214862B2 (en) | Self-lubricating sliding material and lubrication-free bearing using the same | |
| JP6550224B2 (en) | Sliding member and method of manufacturing the same | |
| JPS5939481B2 (en) | Multi-layer sintered sliding member and its manufacturing method | |
| CN115323246B (en) | Mo-containing double-layer iron-based antifriction material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220923 |