CN109267064A - A kind of preparation method of ferrous alloy bearing shell wearing layer - Google Patents
A kind of preparation method of ferrous alloy bearing shell wearing layer Download PDFInfo
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- CN109267064A CN109267064A CN201811333482.7A CN201811333482A CN109267064A CN 109267064 A CN109267064 A CN 109267064A CN 201811333482 A CN201811333482 A CN 201811333482A CN 109267064 A CN109267064 A CN 109267064A
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- bearing shell
- ferrous alloy
- alloy bearing
- cold spray
- powder
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- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Sliding-Contact Bearings (AREA)
- Laser Beam Processing (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of preparation methods of ferrous alloy bearing shell wearing layer, comprising the following steps: (1) polishes ferrous alloy bearing shell surface, and clean up；(2) babbit powder is dried；(3) babbit powder spray is formed on ferrous alloy bearing shell surface by cold spray layer using low pressure cold spray process；(4) laser remolten is carried out to cold spray layer；(5) coaxial carrier gas powder feeding technique is used, babbit powder is sent on cold spray layer after reflow and carries out laser melting coating formation wearing layer；(6) it examines and is machined.Abandoning tradition pouring procedure of the present invention, cold spray layer is formed by low pressure cold spray process, laser remolten makes to form metallurgical bonding between cold spray layer and matrix, last laser melting coating forms that crystal grain is tiny, cladding layer of dense structure, and the defects of segregation-free, hole, crackle, also, without preheating, it is tin plating.
Description
Technical field
The invention belongs to bearing shell preparation technical fields, and in particular to a kind of preparation method of ferrous alloy bearing shell wearing layer.
Background technique
Bearing shell is the part of sliding bearing and journal contact, and shape is the semi-cylindrical of tiles, very smooth, general with green
The wear-resistant materials such as copper, antifriction alloy are made.Tin-base babbit can be used as the wearing layer of bearing shell because of its good antifriction effect, because
And it is widely used in bearing shell.The preparation of traditional babbit-lined metal wearing layer generallys use pouring procedure, this method presenceization
The defects of closing coarse object, segregation and hole, and babbit layer and basal body binding force are poor.
Laser melting and coating technique refers to the coating material for placing selection on being coated matrix surface in a manner of different fillers,
It is allowed to and matrix surface a thin layer while melting through laser irradiation, and form that dilution is extremely low and and basis material after quickly solidifying
At the surface covering of metallurgical bonding.Patent CN107803501A discloses a kind of laser gain material manufacture of tin-base babbit component
Method, the method are laid with certain thickness tin-base babbit powder bed on the substrate of preheating, recycle the heating of laser beam constituency
Alloyed powder last layer forms the laser cladding layer of metallurgical bonding in substrate surface.
Ferrous alloy has preferable wear-resistant, high temperature resistant, anti-oxidant, anti-thermal shock impact property, higher room temperature, high temperature
Hardness and elevated temperature strength, the harsh medium such as excellent resistance to oxidation reduction complex media burn into high-temperature gas burn into chloride are rotten
Erosion, strong reducing property dielectric corrosion, thus be widely used in preparing bearing shell.But the fusing point of ferrous alloy bearing shell matrix is much higher than Pasteur
The fusing point of alloy, and the easy ablation of babbit and oxidation, thus be unsuitable for using laser melting coating, traditional casting is still used at present
Method, also, generally also need to carry out ferrous alloy bearing shell matrix surface tining or tin plating processing, pollution environment, low efficiency,
It is at high cost.
Summary of the invention
It is an object of the invention to: for above-mentioned existing ferrous alloy bearing shell using Pasteur's conjunction of traditional pouring procedure preparation
Golden wearing layer the problems such as there are organizational coarseness, segregation, holes, the present invention provides a kind of preparation side of ferrous alloy bearing shell wearing layer
Method.
The technical solution adopted by the invention is as follows:
A kind of preparation method of ferrous alloy bearing shell wearing layer, comprising the following steps:
(1) it polishes ferrous alloy bearing shell surface, and cleans up；
(2) babbit powder is dried；
(3) use low pressure cold spray process that babbit powder spray on ferrous alloy bearing shell surface, is formed cold spraying
Layer；
(4) laser remolten is carried out to cold spray layer；
(5) coaxial carrier gas powder feeding technique is used, babbit powder is sent on cold spray layer after reflow and carries out laser
Cladding forms wearing layer；
(6) it examines and is machined.
The present invention uses low pressure cold spray process first, and babbit powder is made to hit ferrous alloy under higher kinetic energy
Bearing shell matrix surface is simultaneously deformed, so that being deposited on matrix surface forms cold spray layer, and the obtained cold spray layer porosity
Low, oxidation less, crystallization uniformly, but be mechanical bond between cold spray layer and ferrous alloy bearing shell matrix, bond strength is lower.So
Afterwards by laser remolten, is on the one hand conducive to eliminate the stomata in cold spray layer, further decreases the porosity, on the other hand, weight
When molten, the tin in babbit is reacted with iron generates FeSn, FeSn2Or both have concurrently, form the transition region to interpenetrate, promote
Cold spray layer is changed into metallurgical bonding in conjunction with ferrous alloy bearing shell matrix, by mechanical bond, improves bond strength, finally exists again
It carrying out laser melting coating on cold spray layer, forms cladding layer, i.e. wearing layer, obtained wearing layer crystal grain is tiny, dense structure, and
The defects of segregation-free and hole.
If directly carrying out laser melting coating on ferrous alloy bearing shell matrix, because babbit powder and matrix thin layer melt
Metallurgical bonding could be formed, and the fusing point of ferrous alloy bearing shell matrix is much higher than the fusing point of babbit, and babbit is easily burnt
Therefore erosion and oxidation only carry out cladding in the case where babbit powder melts, the tin in babbit powder is difficult and iron
Reaction, even if a small amount of reaction, can not also obtain preferable combination interface, bond strength is low.The present invention is initially formed cold spray layer,
Make to form mechanical bond between babbit powder and ferrous alloy bearing shell matrix surface, babbit powder become it is flat simultaneously
It is come into full contact with matrix surface, when such laser remolten, tin is easier to react with iron, and mechanical bond is then readily converted into metallurgical junction
It closes.
Further, in step (3), low pressure cold spray process uses nitrogen or compressed air for gas source, technological parameter are as follows:
Air pressure 0.5-1MPa, 100-500 DEG C of gas preheating temperature, nozzle to workpiece distance 5-30mm, powder sending quantity 10-100g/min, sweep
Retouch speed 2-30mm/s.
Further, in step (3), cold spray layer with a thickness of 0.5-2mm.
Further, in step (3), the granularity of babbit powder is 50-80 μm.
Further, in step (4), laser remolten is using argon gas as protective gas, technological parameter are as follows: laser power 0.3-
1.5KW, scanning speed 3-30mm/s, shield gas flow rate 10-30L/min.
Further, in step (5), laser melting coating is using argon gas as protective gas, technological parameter are as follows: laser power 0.3-
2KW, powder sending quantity 5-50g/min, scanning speed 3-25mm/s, shield gas flow rate 5-30L/min, powder feeding air-flow 3-10L/min.
Further, in step (5), the granularity of babbit powder is 53-150 μm.
Further, it in step (6), is machined as turning or scraping.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, abandoning tradition pouring procedure of the present invention forms babbit powder and iron-based axis by low pressure cold spray process
The cold spray layer of watt matrix mechanical bond, then laser remolten is carried out, so that mechanical bond is changed into metallurgical bonding, finally carries out laser
Cladding, forms that crystal grain is tiny, cladding layer of dense structure, and segregation-free, hole, crackle, the defects of falling off, and flatness is good,
Without protrusion or pit, overcomes ferrous alloy bearing shell and be unsuitable for preparing the technology prejudice of wearing layer using laser melting and coating technique；
2, the present invention does not need to carry out tining or tin plating processing to ferrous alloy bearing shell matrix, can avoid tin plating caused ring
Border pollution problem, and it is high-efficient, it is at low cost；
3. the present invention does not need to carry out the pre-heat treatment, energy-saving effect is good.
Detailed description of the invention
Fig. 1 is the metallographic microstructure of 1 wearing layer of the embodiment of the present invention Yu ferrous alloy bearing shell basal body interface.
Specific embodiment
All features disclosed in this specification can be with any other than mutually exclusive feature and/or step
Mode combines.
Embodiment 1
A kind of preparation method of ferrous alloy bearing shell wearing layer, comprising the following steps:
(1) it is polished using sand paper ferrous alloy bearing shell surface, removes surface impurity, and clear using acetone or alcohol
Wash clean；
(2) babbit powder is dried, specifically: by low pressure cold spraying babbit powder and laser melting coating
It is placed in drying box with babbit powder, 70 DEG C after constant temperature drying 2 hours, are poured into cold spraying and laser cladding powder sending device respectively
It is interior；
(3) using low pressure cold spray process by granularity is 50-80 μm of babbit powder spray in ferrous alloy bearing shell
Surface forms the cold spray layer with a thickness of 0.8mm；Use compressed air for gas source, technological parameter are as follows: air pressure 0.85MPa, gas
300 DEG C of preheating temperature, nozzle to workpiece distance 10mm, powder sending quantity 40g/min, scanning speed 20mm/s；
(4) laser remolten is carried out to cold spray layer and uses circular light spot, technological parameter using argon gas as protective gas are as follows: swashed
Optical power 0.5KW, scanning speed 10mm/s, shield gas flow rate 20L/min；
(5) coaxial carrier gas powder feeding technique is used, the Pasteur that granularity is 53-150 μm is sent on cold spray layer after reflow
Alloy powder carries out laser melting coating, forms wearing layer；Laser melting coating is using argon gas as protective gas, technological parameter are as follows: laser power
0.8KW, powder sending quantity 20g/min, scanning speed 10mm/s, shield gas flow rate 25L/min, powder feeding air-flow 5L/min；
(6) it examines and is machined, required ferrous alloy bearing shell is obtained by way of turning or scraping.
Embodiment 2
A kind of preparation method of ferrous alloy bearing shell wearing layer, comprising the following steps:
(1) it is polished using sand paper ferrous alloy bearing shell surface, removes surface impurity, and clear using acetone or alcohol
Wash clean；
(2) babbit powder is dried, specifically: by low pressure cold spraying babbit powder and laser melting coating
It is placed in drying box with babbit powder, 70 DEG C after constant temperature drying 2 hours, are poured into cold spraying and laser cladding powder sending device respectively
It is interior；
(3) using low pressure cold spray process by granularity is 50-80 μm of babbit powder spray in ferrous alloy bearing shell
Surface forms the cold spray layer with a thickness of 1.2mm；Use nitrogen or compressed air for gas source, technological parameter are as follows: air pressure
0.5MPa, 150 DEG C of gas preheating temperature, nozzle to workpiece distance 20mm, powder sending quantity 15g/min, scanning speed 10mm/s；
(4) laser remolten, using argon gas as protective gas, technological parameter are carried out to cold spray layer are as follows: laser power 1.0KW,
Scanning speed 20mm/s, shield gas flow rate 10L/min；
(5) coaxial carrier gas powder feeding technique is used, the Pasteur that granularity is 53-150 μm is sent on cold spray layer after reflow
Alloy powder carries out laser melting coating, forms wearing layer；Laser melting coating is using argon gas as protective gas, technological parameter are as follows: laser power
0.4KW, powder sending quantity 10g/min, scanning speed 5mm/s, shield gas flow rate 10L/min, powder feeding air-flow 8L/min；
(6) it examines and is machined, required ferrous alloy bearing shell is obtained by way of turning or scraping.
Embodiment 3
A kind of preparation method of ferrous alloy bearing shell wearing layer, comprising the following steps:
(1) it is polished using sand paper ferrous alloy bearing shell surface, removes surface impurity, and clear using acetone or alcohol
Wash clean；
(2) babbit powder is dried, specifically: by low pressure cold spraying babbit powder and laser melting coating
It is placed in drying box with babbit powder, 70 DEG C after constant temperature drying 2 hours, are poured into cold spraying and laser cladding powder sending device respectively
It is interior；
(3) using low pressure cold spray process by granularity is 50-80 μm of babbit powder spray in ferrous alloy bearing shell
Surface forms the cold spray layer with a thickness of 1.8mm；Use nitrogen or compressed air for gas source, technological parameter are as follows: air pressure 1MPa,
480 DEG C of gas preheating temperature, nozzle to workpiece distance 28mm, powder sending quantity 80g/min, scanning speed 30mm/s；
(4) laser remolten, using argon gas as protective gas, technological parameter are carried out to cold spray layer are as follows: laser power 1.5KW,
Scanning speed 30mm/s, shield gas flow rate 28L/min；
(5) coaxial carrier gas powder feeding technique is used, the Pasteur that granularity is 53-150 μm is sent on cold spray layer after reflow
Alloy powder carries out laser melting coating, forms wearing layer；Laser melting coating is using argon gas as protective gas, technological parameter are as follows: laser power
1.9KW, powder sending quantity 45g/min, scanning speed 20mm/s, shield gas flow rate 6L/min, powder feeding air-flow 10L/min；
(6) it examines and is machined, required ferrous alloy bearing shell is obtained by way of turning or scraping.
Embodiment 4
To ferrous alloy bearing shell sampling prepared by embodiment 1, and metallographic structure observation is carried out, as shown in Figure 1, can see
Out, it is well combined between ferrous alloy bearing shell matrix and wearing layer, and wearing layer crystal grain is tiny, dense structure, segregation-free, in conjunction with
The defects of interface and the equal flawless of wearing layer, hole, protrusion, pit.
It is as described above the embodiment of the present invention.The present invention is not limited to the above-described embodiments, anyone should learn that
The structure change made under the inspiration of the present invention, the technical schemes that are same or similar to the present invention each fall within this
Within the protection scope of invention.
Claims (8)
1. a kind of preparation method of ferrous alloy bearing shell wearing layer, which comprises the following steps:
(1) it polishes ferrous alloy bearing shell surface, and cleans up；
(2) babbit powder is dried；
(3) use low pressure cold spray process that babbit powder spray on ferrous alloy bearing shell surface, is formed cold spray layer；
(4) laser remolten is carried out to cold spray layer；
(5) coaxial carrier gas powder feeding technique is used, babbit powder is sent on cold spray layer after reflow and carries out laser melting coating,
Form wearing layer；
(6) it examines and is machined.
2. a kind of preparation method of ferrous alloy bearing shell wearing layer according to claim 1, which is characterized in that the step
(3) in, low pressure cold spray process uses nitrogen or compressed air for gas source, technological parameter are as follows: air pressure 0.5-1MPa, gas preheating
100-500 DEG C of temperature, nozzle to workpiece distance 5-30mm, powder sending quantity 10-100g/min, scanning speed 2-30mm/s.
3. a kind of preparation method of ferrous alloy bearing shell wearing layer according to claim 1, which is characterized in that the step
(3) in, cold spray layer with a thickness of 0.5-2mm.
4. a kind of preparation method of ferrous alloy bearing shell wearing layer, feature described in any one of -3 according to claim 1
It is, in the step (3), the granularity of babbit powder is 50-80 μm.
5. a kind of preparation method of ferrous alloy bearing shell wearing layer according to claim 1, which is characterized in that the step
(4) in, laser remolten is using argon gas as protective gas, technological parameter are as follows: laser power 0.3-1.5KW, scanning speed 3-30mm/s,
Shield gas flow rate 10-30L/min.
6. a kind of preparation method of ferrous alloy bearing shell wearing layer according to claim 1, which is characterized in that the step
(5) in, laser melting coating is using argon gas as protective gas, technological parameter are as follows: laser power 0.3-2KW, powder sending quantity 5-50g/min, sweeps
Retouch speed 3-25mm/s, shield gas flow rate 5-30L/min, powder feeding air-flow 3-10L/min.
7. a kind of preparation method of ferrous alloy bearing shell wearing layer according to claim 1 or 6, which is characterized in that described
In step (5), the granularity of babbit powder is 53-150 μm.
8. a kind of preparation method of ferrous alloy bearing shell wearing layer according to claim 1, which is characterized in that the step
(6) it in, is machined as turning or scraping.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811333482.7A CN109267064B (en) | 2018-11-09 | 2018-11-09 | Preparation method of iron-based alloy bearing bush wear-resistant layer |
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| CN201811333482.7A CN109267064B (en) | 2018-11-09 | 2018-11-09 | Preparation method of iron-based alloy bearing bush wear-resistant layer |
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| CN109267064A true CN109267064A (en) | 2019-01-25 |
| CN109267064B CN109267064B (en) | 2020-04-28 |
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| CN201811333482.7A Active CN109267064B (en) | 2018-11-09 | 2018-11-09 | Preparation method of iron-based alloy bearing bush wear-resistant layer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983328A (en) * | 2019-12-27 | 2020-04-10 | 浙江工业大学 | Laser composite cold spraying high-speed deposition method and cold spraying equipment |
| CN111519184A (en) * | 2020-05-06 | 2020-08-11 | 南宁师范大学 | Method for preparing repairing layer on surface of worn high-voltage switch contact |
| US20220241882A1 (en) * | 2019-06-25 | 2022-08-04 | Lisi Automotive | Method for attaching parts by spraying a powder of a ductile material; corresponding assembly |
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| US20140349007A1 (en) * | 2013-05-24 | 2014-11-27 | General Electric Company | Cold spray coating process |
| CN106435563A (en) * | 2016-10-27 | 2017-02-22 | 北京科技大学 | Method for coating bearing bush steel backing with Babbitt metal coating |
| CN107803501A (en) * | 2017-11-18 | 2018-03-16 | 北京科技大学 | A kind of laser gain material manufacture method of tin-base babbit component |
| CN108570674A (en) * | 2018-05-09 | 2018-09-25 | 上海航天设备制造总厂有限公司 | A kind of low-melting alloy laser cladding forming method |
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2018
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| US20140349007A1 (en) * | 2013-05-24 | 2014-11-27 | General Electric Company | Cold spray coating process |
| CN106435563A (en) * | 2016-10-27 | 2017-02-22 | 北京科技大学 | Method for coating bearing bush steel backing with Babbitt metal coating |
| CN107803501A (en) * | 2017-11-18 | 2018-03-16 | 北京科技大学 | A kind of laser gain material manufacture method of tin-base babbit component |
| CN108570674A (en) * | 2018-05-09 | 2018-09-25 | 上海航天设备制造总厂有限公司 | A kind of low-melting alloy laser cladding forming method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220241882A1 (en) * | 2019-06-25 | 2022-08-04 | Lisi Automotive | Method for attaching parts by spraying a powder of a ductile material; corresponding assembly |
| CN110983328A (en) * | 2019-12-27 | 2020-04-10 | 浙江工业大学 | Laser composite cold spraying high-speed deposition method and cold spraying equipment |
| CN111519184A (en) * | 2020-05-06 | 2020-08-11 | 南宁师范大学 | Method for preparing repairing layer on surface of worn high-voltage switch contact |
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| CN109267064B (en) | 2020-04-28 |
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