CN107099793A - The method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability - Google Patents
The method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability Download PDFInfo
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- CN107099793A CN107099793A CN201710164943.1A CN201710164943A CN107099793A CN 107099793 A CN107099793 A CN 107099793A CN 201710164943 A CN201710164943 A CN 201710164943A CN 107099793 A CN107099793 A CN 107099793A
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- Prior art keywords
- laser
- cobalt alloy
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- wheel
- duty
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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
- C23C24/106—Coating with metal alloys or metal elements only
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of method that laser melting coating cobalt alloy coating mitigates heavy-duty wheel wheel wear and track side abrasion, its practice is：Using laser by cobalt alloy powder cladding on the surface of wheel track；The weight percent content of described cobalt alloy powder is：1.1% C, 1.0% Si, 1.5% Fe, 28.5% Cr, 1.5% Ni, 4.4% W, surplus are Co.Heavily loaded wheel track after being handled with this method, wearability is high, and coefficient of friction is low, service life is long.
Description
Technical field
The present invention relates to a kind of method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability.Method.
Background technology
To ensure the safe operation of the railway system, axle weighs more than 25 tons of heavy-duty wheel, the greatest wear depth of heavy-duty steel rail
Degree must be controlled within 35mm and 13mm respectively.Under severe duty, wheel rim and rail flank wear amount are big, these parts
Area rapid wear and cause the service life of heavy-duty wheel and heavy-duty steel rail (heavily loaded wheel track) short.Laser melting and coating technique is in gold
Belong to material surface strengthening, improve wearability and have a wide range of applications.Fe based powdered materials because cost is low and wearability is good,
It is simultaneously close with conventional carbon steel material composition, therefore, by Fe based powders claddings in Rail Surface, its wearability can be effectively improved.
But, during using Fe based powders as cladding material, during due to laser melting coating the fusing of Fe based powdered materials and setting rate quickly,
Uneven microstructure in cladding layer can be caused, easily crack bigger than normal with the porosity, cause its wearability to have much room for improvement.
The content of the invention
It is an object of the invention to provide a kind of method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability, with this
Heavily loaded wheel track after method processing, wearability is high, and coefficient of friction is low, service life is long.
The present invention realizes its goal of the invention, the technical scheme adopted is that a kind of laser melting coating cobalt alloy coating improves weight
The method for carrying wheel track wearability, its practice is：
Using laser by cobalt alloy powder cladding at heavy-duty wheel wheel rim surface or the gauge angle of heavy-duty steel rail；Described
The weight percent content of cobalt alloy powder is：1.1% C, 1.0% Si, 1.5% Fe, 28.5% Cr, 1.5%
Ni, 4.4% W, surplus are Co.
Compared with prior art, the beneficial effects of the invention are as follows：
It is found by the applicant that cobalt (Co) alloy powder of this proportioning of the invention can be by laser melting coating in heavy-duty wheel wheel rim
Surface or the gauge angle of heavy-duty steel rail form excellent, fine and closely woven cladding institutional framework；Position is easily ground so as to significantly improve wheel track
Coefficient of friction between wearability, effectively reduction wheel track.
Test shows, 43.66% is decreased by using the coefficient of friction between the wheel track sample after present invention processing；At cladding
Heavy-duty wheel after reason reduces by 78.18% compared with the heavy-duty wheel wear rate of non-cladding, and the heavy-duty steel rail wear rate after cladding is more not
The heavy-duty steel rail wear rate reduction by 80.43% of cladding.
Further, the present invention using laser by cobalt alloy powder cladding in heavy-duty wheel wheel rim surface or heavy-duty steel rail
The specific practice at gauge angle is：Laser is multimode crossing current CO2Laser, using multiple tracks cladding mode, per pass cladding it is a width of
6-10mm, depth are 0.8-1.2mm；Overlapping rate is 30%, and the energy density of laser beam is 200W/mm2, from the laser beam of laser
Export to heavy-duty wheel wheel rim surface or heavy-duty steel rail gauge angle distance be 280-320mm, laser power 2.8-3.2kw,
Sweep speed 180-220mm/min, laser beam rectangular light spot size is 1 × 7mm, and defocusing amount is 28-30mm, and powder feed rate is 10
~15g/min.
Such operating parameter and technique, can guarantee that Co base alloy powders in multimode crossing current CO2In the presence of laser, fill
That divides melts and equably cladding on the surface easy to wear of wheel track, excellent, fine and closely woven cladding institutional framework can be formed, so that effectively
Improve the coefficient of friction between the wearability of wheel track, reduction wheel track.
Further, a diameter of 50~150 μm of cobalt alloy powder of the present invention.
So, the cost of the Co base alloy powders of meticulous (50 μm of ＜) can have both been reduced, the thick (μ of ＞ 150 can be avoided again
M) fusing of Co base alloy powders is uneven, and causes material cladding layer the defects such as stomata occur.
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the friction coefficient curve that the heavily loaded wheel/rail simulation experiment after present invention processing is measured.
Fig. 2 is the wear rate histogram that the heavily loaded wheel/rail simulation experiment after present invention processing is measured.
Embodiment
Embodiment 1
A kind of method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability, its practice is：
Using laser by cobalt alloy powder cladding heavy-duty wheel wheel rim surface or heavy-duty steel rail gauge angle (i.e. rail
Medial surface of the rail head towards orbit centre)；The weight percent content of described cobalt alloy powder is：1.1% C, 1.0%
Si, 1.5% Fe, 28.5% Cr, 1.5% Ni, 4.4% W, surplus are Co.A diameter of 100 μm of cobalt alloy powder.
The utilization laser of this example is by cobalt alloy powder cladding at heavy-duty wheel wheel rim surface or the gauge angle of heavy-duty steel rail
The specific practice be：Laser is multimode crossing current CO2Laser, using multiple tracks cladding mode, a width of 8mm of per pass cladding, depth
For 1.0mm；Overlapping rate is 30%, and the energy density of laser beam is 200W/mm2, from the laser beam exit of laser to traction engine
The distance at wheel rim surface or the gauge angle of heavy-duty steel rail is 300mm, laser power 3.0kw, sweep speed 200mm/min, is swashed
Light beam rectangular light spot size is 1 × 7mm, and defocusing amount is 29mm, and powder feed rate is 12g/min.
Anti-wear performance test experiments
By the heavy-duty wheel after the processing of the present embodiment method, heavy-duty steel rail and undressed heavy-duty wheel, heavy-duty steel rail,
Wear test is carried out on MMS-2A friction wear testing machines respectively.Wheel speed 380r/min during experiment, according to Hertz contact
Criterion, 25 tons of dry state dry conditions Imitating scene, axle weight field working conditions are tested.
The friction coefficient curve that Fig. 1 obtains for experiment；As seen from Figure 1, in the experimentation, between the wheel track after cladding alloy
Coefficient of friction is about 0.4, and untreated wheel-rail friction coefficient is about 0.71, decreases by 43.66%.
Fig. 2 is the wear rate result for testing post analysis wheel and rail.Fig. 2 shows：Wheel track after Laser Cladding Treatment
Wear rate is significantly reduced, the heavy-duty wheel wear rate reduction by 78.18% after cladding processing, the heavy-duty steel rail abrasion after cladding processing
Rate reduction by 80.43%, significantly, reduction abrasion have great significance antifriction effect to the wheel track life-span under extension fully loaded transportation condition.
Embodiment 2
A kind of method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability, its practice is：
Using laser by cobalt alloy powder cladding at heavy-duty wheel wheel rim surface or the gauge angle of heavy-duty steel rail；Described
The weight percent content of cobalt alloy powder is：1.1% C, 1.0% Si, 1.5% Fe, 28.5% Cr, 1.5%
Ni, 4.4% W, surplus are Co.A diameter of 50 μm of cobalt alloy powder.
The utilization laser of this example is by cobalt alloy powder cladding at heavy-duty wheel wheel rim surface or the gauge angle of heavy-duty steel rail
The specific practice be：Laser is multimode crossing current CO2Laser, using multiple tracks cladding mode, a width of 6mm of per pass cladding, depth are
1.2mm；Overlapping rate is 30%, and the energy density of laser beam is 200W/mm2, from the laser beam exit of laser to heavy-duty wheel
The distance at the gauge angle of wheel rim surface or heavy-duty steel rail is 280mm, laser power 3.2kw, sweep speed 180mm/min, laser
Beam rectangular light spot size is 1 × 7mm, and defocusing amount is 28mm, and powder feed rate is 15g/min.
Embodiment 3
A kind of method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability, its practice is：
Using laser by cobalt alloy powder cladding at heavy-duty wheel wheel rim surface or the gauge angle of heavy-duty steel rail；Described
The weight percent content of cobalt alloy powder is：1.1% C, 1.0% Si, 1.5% Fe, 28.5% Cr, 1.5%
Ni, 4.4% W, surplus are Co.A diameter of 150 μm of cobalt alloy powder.
The utilization laser of this example is by cobalt alloy powder cladding at heavy-duty wheel wheel rim surface or the gauge angle of heavy-duty steel rail
The specific practice be：Laser is multimode crossing current CO2Laser, using multiple tracks cladding mode, a width of 10mm of per pass cladding, depth are
0.8mm；Overlapping rate is 30%, and the energy density of laser beam is 200W/mm2, from the laser beam exit of laser to heavy-duty wheel
The distance at the gauge angle of wheel rim surface or heavy-duty steel rail is 320mm, laser power 2.8kw, sweep speed 220mm/min, laser
Beam rectangular light spot size is 1 × 7mm, and defocusing amount is 30mm, and powder feed rate is 10g/min.
Claims (3)
1. a kind of method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability, its practice is：
Using laser by cobalt alloy powder cladding at heavy-duty wheel wheel rim surface or the gauge angle of heavy-duty steel rail；Described cobalt is closed
Bronze end weight percent content be：1.1% C, 1.0% Si, 1.5% Fe, 28.5% Cr, 1.5% Ni,
4.4% W, surplus are Co.
2. the method that a kind of laser melting coating cobalt alloy coating according to claim 1 improves heavily loaded wheel track wearability, it is special
Levy and be：Described utilization laser is by cobalt alloy powder cladding at the gauge angle of heavy-duty wheel wheel rim surface or heavy-duty steel rail
Specifically the practice is：Laser is multimode crossing current CO2Laser, using multiple tracks cladding mode, a width of 6-10mm of per pass cladding, depth
For 0.8-1.2mm；Overlapping rate is 30%, and the energy density of laser beam is 200W/mm2, from the laser beam exit of laser to weight
The distance at carrier vehicle wheel rim surface or the gauge angle of heavy-duty steel rail is 280-320mm, laser power 2.8-3.2kw, sweep speed
180-220mm/min, laser beam rectangular light spot size is 1 × 7mm, and defocusing amount is 28-30mm, and powder feed rate is 10~15g/
min。
3. the method that laser melting coating cobalt alloy coating according to claim 1 improves heavily loaded wheel track wearability, its feature exists
In：A diameter of 50~150 μm of the cobalt alloy powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164943.1A CN107099793A (en) | 2017-03-20 | 2017-03-20 | The method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability |
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| CN201710164943.1A CN107099793A (en) | 2017-03-20 | 2017-03-20 | The method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability |
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| CN201710164943.1A Pending CN107099793A (en) | 2017-03-20 | 2017-03-20 | The method that laser melting coating cobalt alloy coating improves heavily loaded wheel track wearability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513643A (en) * | 2017-10-29 | 2017-12-26 | 吉林大学 | Laser melting coating Co-base alloy material and product |
| CN110344048A (en) * | 2019-07-17 | 2019-10-18 | 株洲辉锐增材制造技术有限公司 | Laser cladding layer of high manganese steel frog and preparation method thereof and high manganese steel frog |
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| JP3120227B2 (en) * | 1996-12-30 | 2000-12-25 | ケウム カン カンパニー リミテッド | Manufacturing method of cobalt heat-resistant alloy |
| CN1803370A (en) * | 2006-01-18 | 2006-07-19 | 阴生毅 | Steel rail surface alloy layer welding method and its material |
| CN101596551A (en) * | 2009-07-03 | 2009-12-09 | 北京工业大学 | A kind of pairing gold plating seamless steel tube top and preparation method |
| CN101705487A (en) * | 2009-11-05 | 2010-05-12 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing reignition turbine first-stage work bladetip wear-resistant coating |
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2017
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Patent Citations (4)
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| JP3120227B2 (en) * | 1996-12-30 | 2000-12-25 | ケウム カン カンパニー リミテッド | Manufacturing method of cobalt heat-resistant alloy |
| CN1803370A (en) * | 2006-01-18 | 2006-07-19 | 阴生毅 | Steel rail surface alloy layer welding method and its material |
| CN101596551A (en) * | 2009-07-03 | 2009-12-09 | 北京工业大学 | A kind of pairing gold plating seamless steel tube top and preparation method |
| CN101705487A (en) * | 2009-11-05 | 2010-05-12 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing reignition turbine first-stage work bladetip wear-resistant coating |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513643A (en) * | 2017-10-29 | 2017-12-26 | 吉林大学 | Laser melting coating Co-base alloy material and product |
| CN107513643B (en) * | 2017-10-29 | 2019-04-02 | 吉林大学 | Laser melting coating Co-base alloy material and product |
| CN110344048A (en) * | 2019-07-17 | 2019-10-18 | 株洲辉锐增材制造技术有限公司 | Laser cladding layer of high manganese steel frog and preparation method thereof and high manganese steel frog |
| CN110344048B (en) * | 2019-07-17 | 2021-06-22 | 株洲辉锐增材制造技术有限公司 | Laser cladding layer of high manganese steel frog, preparation method of laser cladding layer and high manganese steel frog |
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Application publication date: 20170829 |