CN106283032A - A kind of method that mining machinery hydraulic cylinder outer round surface remanufactures - Google Patents
A kind of method that mining machinery hydraulic cylinder outer round surface remanufactures Download PDFInfo
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- CN106283032A CN106283032A CN201510275838.6A CN201510275838A CN106283032A CN 106283032 A CN106283032 A CN 106283032A CN 201510275838 A CN201510275838 A CN 201510275838A CN 106283032 A CN106283032 A CN 106283032A
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Abstract
The invention discloses a kind of method that mining machinery hydraulic cylinder outer round surface remanufactures, the method includes: (1) uses sand blasting unit that waste and old mining machinery hydraulic cylinder outer round surface is carried out roughening treatment；(2) using the Supersonic Plasma Spraying waste and old mining machinery hydraulic cylinder outer round surface after roughening to prepare coating, the thickness of described coating is 0.3-1.5mm；(3) use laser melting coating that described coating carries out cladding, form cladding layer；(4) described clad layer surface is carried out grinding so that obtained mining machinery hydraulic cylinder outer round surface meets design size.The present invention not only provides the reproducing method of a kind of mining machinery hydraulic cylinder outer round surface, remanufactures product and reaches new product performance, and can overcome the defect of existing surface strengthening technology, has advantage that is quick, efficient and that save material.
Description
Technical field
The present invention relates to a kind of method that mining machinery hydraulic cylinder outer round surface remanufactures.
Background technology
According to investigation and the relevant information of enterprise's feedback, due to the working environment very severe in coal mine,
There are substantial amounts of SO2、H2S、Cl-、SO4 2-Deng corrosive medium, envionmental humidity is typically 75%
Left and right, and, underground coal mine forced ventilation, oxygen content is sufficient, easily causes hydraulic cylinder outer round surface rotten
Erosion and abrasion.
It addition, coal mine underground coal bed structure is complicated, hydraulic support deflection load-bearing stress, cycle stand under load, big gun adopt or
The bad working environments such as tomography happen occasionally, and this also can bring damaging influence to hydraulic cylinder, ultimately results in hydraulic pressure
Stent failure.If inefficacy hydraulic cylinder is discarded will result in serious waste of material, utilize re-manufacturing technology
The hydraulic cylinder of inefficacy can turn waste be changed into values, and the performance of the hydraulic cylinder after remanufacturing can meet or exceed newly
The performance of hydraulic cylinder, it is achieved that the green utilization of material.
Common re-manufacturing technology has thermal spraying and cladding etc., uses plasma spray technology to impaired hydraulic cylinder
Outer round surface remanufactures, and its bond strength is the most relatively low.Owing to often there being ickings splashing etc. right in mine
Hydraulic cylinder outer surface impacts, and sprayed coating is easy to peel off in such circumstances, drastically influence and remanufactures
The life-span of hydraulic cylinder and industrial and mineral production safety.Prior art typically uses the method for laser melting coating to impaired
Hydraulic cylinder outer round surface remanufactures, and this process is obtained in that thicker cladding layer, interface cohesion
Reliably, but also exist following clearly disadvantageous:
1) material consumption is bigger with waste.Technical standard typically requiring, on matrix, 0.2mm to be had is left
Right surface peening layer can meet job requirement, and existing laser melting coating uses the side of limit powder feeding limit cladding
Method, its cladding layer Pingdu difference is big, after causing cladding layer that bigger thickness must be had to ensure turning and grinding
The thickness of working lining, general cladding layer need to be reserved the allowance of about 2mm, cause the biggest material to disappear
Consumption and wastage；
2) existing laser cladding method efficiency is low.Owing to cladding layer need to reserve larger thickness, cause cladding
Time is longer；Owing to the cladding time is longer, inevitably there is thermal stress and a small amount of deformation in part,
Affect subsequent turning and grinding；
3) allowance is big.On the one hand the cladding layer prepared due to existing laser cladding method is thicker；Separately
On the one hand low due to cladding efficiency, cause workpiece heated time long, thermal stress is relatively big, and particularly intensity is relatively
Low, structure is complex, the part of thinner thickness can be deformed, and so must also require that cladding layer has
Bigger thickness offsets deformation.The cladding layer that thickness faced by so is bigger, must use when post processing
Turnery processing, not only extends repair time, also results in the material being difficult to select hardness higher, limits
Cladding material scope.
Therefore, need badly at present and find a kind of defect that can overcome above-mentioned prior art and can have fast
Speed, efficient, the new method remanufacturing mining machinery hydraulic cylinder outer round surface of saving material.
Summary of the invention
It is an object of the invention to the defect overcoming prior art laser melting coating one-step method to prepare coating, it is provided that one
Plant and can have what quick, efficient, to save material new mining machinery hydraulic cylinder outer round surface remanufactured
Method.
To achieve these goals, the present invention provides a kind of mining machinery hydraulic cylinder outer round surface to remanufacture
Method, the method includes: (1) uses sand blasting unit to carry out waste and old mining machinery hydraulic cylinder outer round surface
Roughening treatment；(2) Supersonic Plasma Spraying waste and old mining machinery hydraulic cylinder cylindrical after roughening is used
Coating is prepared on surface, and the thickness of described coating is 0.3-1.5mm；(3) use laser melting coating to described painting
Layer carries out cladding, forms cladding layer；(4) described clad layer surface is carried out grinding so that obtained
Mining machinery hydraulic cylinder outer round surface meets design size.
The said method of the present invention can overcome prior art laser melting coating one-step method to prepare lacking of coating
Fall into, and both saved material, time-consuming, Reducing distortion, minimizing allowance, reduced cost, increase
Coating material scope；Prepare coating with thermal spraying one-step method to compare, moreover it is possible to the coating of mechanical bond become
Metallurgical binding, improves the bond strength of coating further, solves thermal spraying and cannot remanufacture hydraulic cylinder cylindrical
Deficiency.
Further, the present invention not only provides the side of remanufacturing of a kind of mining machinery hydraulic cylinder outer round surface
Method, remanufactures product and reaches, even better than new product performance, and can overcome existing surface strengthening technology
Defect, have quick, efficiently and the advantage of saving material.
Specifically, relative to the technique of prior art, the method for the present invention also has the advantage that
1) cover performance is good.The optional scope of material is big, under preferable case, by special in clad material
Do not add ceramic phase, coating hardness, wearability and corrosion resistance can be improved, improve and remanufacture product
Reliability and life-span so that remanufacture product and reach, even better than new product performance；
2) material is saved.The coating uniform using Supersonic Plasma Spraying technique to prepare is fine and close, preparation
The coating of 0.2mm only need to reserve the allowance of about 0.4mm, with the laser melting coating of prior art
The allowance of reserved 2mm is compared and is saved material；
3) the cladding time is short.The coating that the first step uses Supersonic Plasma Spraying to prepare is relatively thin, and all
Even, fine and close, lower power and higher linear velocity can be used during second step laser melting coating to realize coating
Remelting so that workpiece heat affecting is little, deforms little；
4) allowance is little.Owing to thickness reserved in spraying process is less, when post processing without adopting
With turnery processing, directly carry out grinding, not only save the time, also optional harder material
Material is to improve coating abrasion performance；
5) say from spray angle, improve the bond strength of sprayed coating, make sprayed coating can be applicable to badly
Minepit environment；Say from laser melting coating angle, i.e. save the time of remanufacturing, reduce again cost；
6) sprayed on material is cheap.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Detailed description of the invention
Hereinafter the detailed description of the invention of the present invention is described in detail.It should be appreciated that this place is retouched
The detailed description of the invention stated is merely to illustrate and explains the present invention, is not limited to the present invention.
The invention provides a kind of method that mining machinery hydraulic cylinder outer round surface remanufactures, the method bag
Include: (1) uses sand blasting unit that waste and old mining machinery hydraulic cylinder outer round surface is carried out roughening treatment；(2)
The Supersonic Plasma Spraying waste and old mining machinery hydraulic cylinder outer round surface after roughening is used to prepare coating,
The thickness of described coating is 0.3-1.5mm；(3) use laser melting coating that described coating is carried out cladding, shape
Become cladding layer；(4) described clad layer surface is carried out grinding so that obtained mining machinery hydraulic cylinder
Outer round surface meets design size.
In the present invention, described waste and old mining machinery hydraulic cylinder be surface have damage and need and can
Carry out the mining machinery hydraulic cylinder remanufactured, described waste and old merely to distinguish mining machinery hydraulic cylinder again
State before manufacturing and after remanufacturing, actually refers both to same mining machinery hydraulic cylinder.In the present invention,
Need to carry out the mining machinery hydraulic cylinder that remanufactures and be sequentially completed Supersonic Plasma Spraying and laser melts
Cover the mining machinery hydraulic cylinder being afterwards after remanufacturing, and complete Supersonic Plasma Spraying and laser
Waste and old mining machinery hydraulic cylinder it is before cladding.Those skilled in the art should not be construed as the present invention's
Limit.
In the method for the invention, the concrete operations technique of described laser melting coating is those skilled in the art
Known, the present invention does not repeats them here.
The said method of the present invention have saving material, time-consuming, Reducing distortion, minimizing allowance,
Reduce cost, the advantage increasing coating material scope, moreover it is possible to the coating of mechanical bond is become metallurgical binding,
Further increase the bond strength of coating.
According to method of the present invention, it was found by the inventors of the present invention that when the thickness of described coating is
During 0.4-0.8mm, by the method for the present invention obtain remanufacture after the use of mining machinery hydraulic cylinder
Performances etc. all reach optimum.
It was found by the inventors of the present invention that use the side combined by Supersonic Plasma Spraying with laser melting coating
Method can ideally overcome solely use Supersonic Plasma Spraying time obtained remanufacture after ore deposit
The coating of mechanical bond, in the defect of the underground coal mine poor effect of bad environments, is become by mountain mechanical-hydraulic cylinder
For metallurgical binding, further increase the bond strength of coating, extend coating service life；Overcome list
The defects such as one ground is time-consuming when using laser melting coating to remanufacture, consumptive material, deformation is big, allowance is big, and increase
Big clad material scope, improves performance and the service life of coating.
The method remanufactured according to mining machinery hydraulic cylinder outer round surface of the present invention, wherein, described
The linear velocity of spraying can be 40-60m/min.
The method remanufactured according to mining machinery hydraulic cylinder outer round surface of the present invention, wherein, described
The linear velocity of laser melting coating can be 0.1-0.3m/s；Preferably, the linear velocity of described laser melting coating is
0.12-0.25m/s。
The method remanufactured according to mining machinery hydraulic cylinder outer round surface of the present invention, wherein, described
The cladding step pitch of laser melting coating can be 7-11mm；Preferably, the cladding step pitch of described laser melting coating is
9.5-10.5mm。
In the method that mining machinery hydraulic cylinder outer round surface of the present invention remanufactures, to described coating
Kind there is no particular limitation, the method for the present invention may be used for the coating of various kind, but, for
Make the coating higher with the bond strength of waste and old mining machinery hydraulic cylinder outer round surface, the preferred institute of the present invention
State the composite coating that coating is self-fluxing alloy coating or self-fluxing alloy and pottery.
It was found by the inventors of the present invention that when described coating contains in fe-based alloy powder and nickel-base alloy powder
At least one and containing Al2O3、TiO2During with at least one in tungsten carbide (WC), by this coating
The cladding layer corrosion resistance and the wearability that are formed are higher, thus improve the service life of cladding layer.
Further, when Cr, 0.3-0.7 weight % containing 12-15 weight % in described fe-based alloy powder
Mo, 3.5-4 of Si, 1.5-1.9 weight % of B, 1-1.5 weight % of Mn, 0.5-1.1 weight %
During the Fe of the C of Ni, 0.1-0.15 weight % of weight % and surplus, it is possible to make the cladding layer formed
Service life longer.
Under preferable case, in terms of the total amount of described nickel-base alloy powder, when described nickel-base alloy powder contains
During tungsten carbide (WC) of Ni45 and 2-30 weight % of 70-98 weight %, it is possible to make to be formed is molten
The service life of coating is longer.
The method remanufactured according to mining machinery hydraulic cylinder outer round surface of the present invention, the method is also wrapped
Include: before carrying out described roughening treatment, use turning or method for grinding to remove waste and old mining machinery hydraulic pressure
At least one in damage layer, fatigue layer and the strengthening layer of cylinder outer round surface.
According to a kind of preferred embodiment of the present invention, mining machinery hydraulic pressure of the present invention
The method that cylinder outer round surface remanufactures includes:
(1) use turning or method for grinding remove waste and old mining machinery hydraulic cylinder outer round surface damage layer,
At least one in fatigue layer and strengthening layer；
(2) use sand blasting unit that waste and old mining machinery hydraulic cylinder outer round surface is carried out roughening treatment；
(3) Supersonic Plasma Spraying waste and old mining machinery hydraulic cylinder outer round surface after roughening is used
Preparation coating, the thickness of described coating is 0.3-1.5mm；
(4) use laser melting coating that described coating carries out cladding, form cladding layer；
(5) described clad layer surface is carried out grinding, make mining machinery hydraulic cylinder outer round surface meet and set
Meter size.
In the method that mining machinery hydraulic cylinder outer round surface of the present invention remanufactures, preferably remove useless
At least one in damage layer, fatigue layer and the strengthening layer of old mining machinery hydraulic cylinder outer round surface so that
The radius of the radius ratio standard hydraulic cylinder cylindrical of the waste and old mining machinery hydraulic cylinder cylindrical obtained is little
0.2-1.5mm。
In the method for the invention, it is also possible to include waste and old mining machinery hydraulic cylinder described in alignment may be deposited
The deformation of trace.
In the present invention, it is also possible to use ethanol and/or acetone to waste and old mining machinery hydraulic cylinder cylindrical table
Face is carried out, and removes the residual stains of waste and old mining machinery hydraulic cylinder outer round surface.
The said method of the present invention both saved material, time-consuming, Reducing distortion, minimizing allowance,
Reduce cost, increase coating material scope, moreover it is possible to the coating of mechanical bond is become metallurgical binding, enters one
Step improves the bond strength of coating, thus extends the service life of coating.
Specifically, the said method of the present invention has the advantage that
1) cover performance is good.The optional scope of material is big, by adding ceramic phase in clad material, and can
Improve coating hardness, wearability and corrosion resistance, thus improve reliability and the life-span remanufacturing product,
Make to remanufacture product to reach, even better than new product performance；
2) material is saved.The coating uniform using Supersonic Plasma Spraying technique to prepare is fine and close, such as
When preparing the coating of 0.2mm, only need to reserve the allowance of about 0.4mm, with prior art
Laser melting coating is reserved the allowance of 2mm and is compared and save material；
3) the cladding time is short.The coating that the first step uses Supersonic Plasma Spraying to prepare is relatively thin, and all
Even, fine and close, lower power and higher linear velocity can be used during second step laser melting coating to realize coating
Remelting so that workpiece heat affecting is little, deforms little；
4) allowance is little.Owing to thickness reserved in spraying process is less, when post processing without adopting
With turnery processing, directly carry out grinding, not only save the time, also optional harder material
Material is to improve coating abrasion performance；
5) say from spray angle, improve the bond strength of sprayed coating, make sprayed coating can be applicable to badly
Minepit environment；Say from laser melting coating angle, i.e. save the time of remanufacturing, reduce again cost.
6) sprayed on material is cheap.
Hereinafter will be described the present invention by embodiment.
In the examples below, the various materials used and instrument are all from being purchased.In following example
The degree of wear of the waste and old hydraulic cylinder outer round surface used is suitable.
Embodiment 1
The present embodiment, for the method that the mining machinery hydraulic cylinder outer round surface of the present invention remanufactures is described, has
Body ground, the step of the present embodiment is as follows:
1) fatigue layer of waste and old mining machinery hydraulic cylinder outer round surface is removed so that the waste and old mine obtained
The little 0.5mm of radius of the radius ratio standard mining machinery hydraulic cylinder cylindrical of mechanical-hydraulic cylinder cylindrical；
2) use sand blasting unit (purchased from Beijing Tian Ningxincheng Machinery Co., Ltd., model is TNS-900,
Lower with) to through step 1) and after the waste and old mining machinery hydraulic cylinder outer round surface that obtains carry out roughening treatment；
3) use Supersonic Plasma Spraying through step 2) after outside the waste and old mining machinery hydraulic cylinder that obtains
Circular surfaces prepares coating, and the thickness of described coating is 0.7mm, the chemical composition of described coating such as table 1 institute
Showing, the operating parameter of described Supersonic Plasma Spraying is as shown in table 2；
4) use laser melting coating to through step 3) after the institute of mining machinery hydraulic cylinder outer round surface that obtains
Stating coating and carry out cladding, form cladding layer, wherein, the linear velocity of described laser melting coating is 0.23m/s,
Cladding step pitch is 10mm；
5) described clad layer surface is carried out grinding so that obtained mining machinery hydraulic cylinder cylindrical table
Face meets design size and (makes the mining machinery hydraulic cylinder by obtaining after the method remanufactured of the present invention
The size of outer round surface is equivalently-sized with standard mining machinery hydraulic cylinder outer round surface, lower same).
Table 1
| Kind | Cr | Mn | B | Si | Mo | Ni | C | Fe |
| Content (weight %) | 13 | 0.5 | 0.8 | 1.2 | 1.7 | 3.5 | 0.15 | Surplus |
Table 2
| Argon flow amount/L/min | Voltage/V | Electric current/A | Powder feeding rate/g/min |
| 120 | 150 | 380 | 180 |
The above-mentioned mining machinery hydraulic cylinder obtained through remanufacturing is cut, sample after it is cut
Properties detect, and contrast with the properties of stock solution cylinder pressure material and pure sprayed coating,
It was found that the Rockwell hardness of the above-mentioned cladding layer obtained after remanufacturing is 48HRC, and stock solution
Cylinder pressure new product coating Rockwell hardness is also 48HRC, the tissue of cladding layer and consistency and stock solution cylinder pressure material
Material approximation, porosity is less than pure sprayed coating；Cladding layer bond strength is up to 200MPa, with stock solution cylinder pressure
Material proximate, only has 48Mpa without the sprayed coating of re melting process；Use the UMT-3 of CETR company
Testing machine carries out frictional wear experiment, and friction parameter is frequency 10Hz, and polishing scratch length 3mm, during friction
Between 20min, oil lubrication, record two kinds of cladding layer wear volumes suitable, be 4 × 10-3mm3Left and right.
In general, the hydraulic cylinder properties obtained is remanufactured close with new product coating, in addition " two-step method "
Prepare that coating is relatively thin, the cladding time is shorter, powder waste is less, without turning process, be integrally improved
Efficiency, cost, better economy are saved.
Embodiment 2
The present embodiment, for the method that the mining machinery hydraulic cylinder outer round surface of the present invention remanufactures is described, has
Body ground, the step of the present embodiment is as follows:
1) fatigue layer of waste and old mining machinery hydraulic cylinder outer round surface is removed so that the waste and old mine obtained
The little 0.4mm of radius of the radius ratio standard mining machinery hydraulic cylinder cylindrical of mechanical-hydraulic cylinder cylindrical；
2) use sand blasting unit to through step 1) after the waste and old mining machinery hydraulic cylinder outer round surface that obtains
Carry out roughening treatment；
3) use Supersonic Plasma Spraying through step 2) after outside the waste and old mining machinery hydraulic cylinder that obtains
Circular surfaces prepares coating, and the thickness of described coating is 0.6mm, the chemical composition of described coating such as table 3 institute
Showing, the operating parameter of described Supersonic Plasma Spraying is as shown in table 4；
4) use laser melting coating to through step 3) after the institute of mining machinery hydraulic cylinder outer round surface that obtains
Stating coating and carry out cladding, form cladding layer, wherein, the linear velocity of described laser melting coating is 0.25m/s,
Cladding step pitch is 10.5mm；
5) described clad layer surface is carried out grinding so that obtained mining machinery hydraulic cylinder cylindrical table
Face meets design size.
Table 3
| Kind | Cr | Mn | B | Si | Mo | Ni | C | Fe |
| Content (weight %) | 14 | 0.3 | 0.8 | 1.5 | 1.9 | 3.9 | 0.1 | Surplus |
Table 4
| Argon flow amount/L/min | Voltage/V | Electric current/A | Powder feeding rate/g/min |
| 100 | 150 | 380 | 180 |
The above-mentioned mining machinery hydraulic cylinder obtained through remanufacturing is cut, sample after it is cut
Properties detect, and contrast with the properties of stock solution cylinder pressure material and pure sprayed coating,
It was found that the Rockwell hardness of the above-mentioned cladding layer obtained after remanufacturing is 49HRC；Cladding layer
Tissue and consistency and stock solution cylinder pressure material proximate；Cladding layer bond strength is up to 190MPa；Use
The UMT-3 testing machine of CETR company carries out frictional wear experiment, and friction parameter is frequency 10Hz, mill
Trace length 3mm, fraction time 20min, oil lubrication, recording coating wear volume is 4 × 10-3mm3
Left and right.In general, the above-mentioned mining machinery hydraulic cylinder properties obtained through remanufacturing and enforcement
The hydraulic cylinder remanufacturing gained in example 1 is close.
Embodiment 3
The present embodiment, for the method that the mining machinery hydraulic cylinder outer round surface of the present invention remanufactures is described, has
Body ground, the step of the present embodiment is as follows:
1) fatigue layer of waste and old mining machinery hydraulic cylinder outer round surface is removed so that the waste and old mine obtained
The little 0.6mm of radius of the radius ratio standard mining machinery hydraulic cylinder cylindrical of mechanical-hydraulic cylinder cylindrical；
2) use sand blasting unit to through step 1) after the waste and old mining machinery hydraulic cylinder outer round surface that obtains
Carry out roughening treatment；
3) use Supersonic Plasma Spraying through step 2) after outside the waste and old mining machinery hydraulic cylinder that obtains
Circular surfaces prepares coating, and the thickness of described coating is 0.8mm, and described coating is metal-cermic coating, its
Chemical composition is as shown in table 5, and the operating parameter of described Supersonic Plasma Spraying is as shown in table 6；
4) use laser melting coating to through step 3) after the institute of mining machinery hydraulic cylinder outer round surface that obtains
Stating coating and carry out cladding, form cladding layer, wherein, the linear velocity of described laser melting coating is 0.22m/s,
Cladding step pitch is 9.5mm；
5) described clad layer surface is carried out grinding so that obtained mining machinery hydraulic cylinder cylindrical table
Face meets design size.
Table 5
Table 6
| Argon flow amount/L/min | Voltage/V | Electric current/A | Powder feeding rate/g/min |
| 125 | 150 | 380 | 180 |
The above-mentioned mining machinery hydraulic cylinder obtained through remanufacturing is cut, sample after it is cut
Properties detect, and contrast with the properties of stock solution cylinder pressure material and pure sprayed coating,
It was found that the Rockwell hardness of the above-mentioned cladding layer obtained after remanufacturing is 50HRC；Cladding layer
Tissue and consistency and stock solution cylinder pressure material proximate；Cladding layer bond strength is up to 180MPa；Use
The UMT-3 testing machine of CETR company carries out frictional wear experiment, and friction parameter is frequency 10Hz, mill
Trace length 3mm, fraction time 20min, oil lubrication, recording coating wear volume is 3 × 10-3mm3
Left and right.In general, the above-mentioned mining machinery hydraulic cylinder properties obtained through remanufacturing and enforcement
The hydraulic cylinder remanufacturing gained in example 1 is suitable, and has hardness compared with big, the preferable advantage of wearability.
Embodiment 4
The present embodiment, for the method that the mining machinery hydraulic cylinder outer round surface of the present invention remanufactures is described, has
Body ground, the method for the present embodiment is similar to the method for embodiment 1, except for the difference that, the coating of the present embodiment
Thickness be 1mm.
The above-mentioned mining machinery hydraulic cylinder obtained through remanufacturing is cut, sample after it is cut
Properties detect, and contrast with the properties of stock solution cylinder pressure material and pure sprayed coating,
It was found that the Rockwell hardness of the above-mentioned cladding layer obtained after remanufacturing is 45HRC；Cladding layer
Tissue and consistency and stock solution cylinder pressure material proximate；Cladding layer bond strength is up to 150MPa；Use
The UMT-3 testing machine of CETR company carries out frictional wear experiment, and friction parameter is frequency 10Hz, mill
Trace length 3mm, fraction time 20min, oil lubrication, recording coating wear volume is 4 × 10-3mm3
Left and right.
Embodiment 5
The present embodiment, for the method that the mining machinery hydraulic cylinder outer round surface of the present invention remanufactures is described, has
Body ground, the method for the present embodiment is similar to the method for embodiment 2, and except for the difference that, the present embodiment is removed useless
The fatigue layer of old mining machinery hydraulic cylinder outer round surface so that the waste and old mining machinery hydraulic cylinder cylindrical obtained
The little 0.8mm of radius of radius ratio standard mining machinery hydraulic cylinder cylindrical.
The above-mentioned mining machinery hydraulic cylinder obtained through remanufacturing is cut, sample after it is cut
Properties detect, and contrast with the properties of stock solution cylinder pressure material and pure sprayed coating,
It was found that the Rockwell hardness of the above-mentioned cladding layer obtained after remanufacturing is 45HRC；Cladding layer
Tissue and consistency and stock solution cylinder pressure material proximate；Cladding layer bond strength is up to 170MPa；Use
The UMT-3 testing machine of CETR company carries out frictional wear experiment, and friction parameter is frequency 10Hz, mill
Trace length 3mm, fraction time 20min, oil lubrication, recording coating wear volume is 4 × 10-3mm3
Left and right.
Embodiment 6
The present embodiment, for the method that the mining machinery hydraulic cylinder outer round surface of the present invention remanufactures is described, has
Body ground, the method for the present embodiment is similar to the method for embodiment 3, except for the difference that, the laser of the present embodiment
The linear velocity of cladding is 0.1m/s.
The above-mentioned mining machinery hydraulic cylinder obtained through remanufacturing is cut, sample after it is cut
Properties detect, and contrast with the properties of stock solution cylinder pressure material and pure sprayed coating,
It was found that the Rockwell hardness of the above-mentioned cladding layer obtained after remanufacturing is 45HRC；Cladding layer
Tissue and consistency and stock solution cylinder pressure material proximate；Cladding layer bond strength is up to 150MPa；Use
The UMT-3 testing machine of CETR company carries out frictional wear experiment, and friction parameter is frequency 10Hz, mill
Trace length 3mm, fraction time 20min, oil lubrication, recording coating wear volume is 3 × 10-3mm3
Left and right.
Embodiment 7
The present embodiment, for the method that the mining machinery hydraulic cylinder outer round surface of the present invention remanufactures is described, has
Body ground, the method for the present embodiment is similar to the method for embodiment 6, except for the difference that, the laser of the present embodiment
The cladding step pitch of cladding is 11mm.
The above-mentioned mining machinery hydraulic cylinder obtained through remanufacturing is cut, sample after it is cut
Properties detect, and contrast with the properties of stock solution cylinder pressure material and pure sprayed coating,
It was found that the Rockwell hardness of the above-mentioned cladding layer obtained after remanufacturing is 45HRC；Cladding layer
Tissue and consistency and stock solution cylinder pressure material proximate；Cladding layer bond strength is up to 130MPa；Use
The UMT-3 testing machine of CETR company carries out frictional wear experiment, and friction parameter is frequency 10Hz, mill
Trace length 3mm, fraction time 20min, oil lubrication, recording coating wear volume is 3 × 10-3mm3
Left and right.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited to above-mentioned reality
Execute the detail in mode, in the technology concept of the present invention, can be to the technical side of the present invention
Case carries out multiple simple variant, and these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technology described in above-mentioned detailed description of the invention is special
Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid need not
The repetition wanted, various possible compound modes are illustrated by the present invention the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as its
Without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. the method that a mining machinery hydraulic cylinder outer round surface remanufactures, it is characterised in that the method
Including: (1) uses sand blasting unit that waste and old mining machinery hydraulic cylinder outer round surface is carried out roughening treatment；(2)
The Supersonic Plasma Spraying waste and old mining machinery hydraulic cylinder outer round surface after roughening is used to prepare coating,
The thickness of described coating is 0.3-1.5mm；(3) use laser melting coating that described coating is carried out cladding, shape
Become cladding layer；(4) described clad layer surface is carried out grinding so that obtained mining machinery hydraulic cylinder
Outer round surface meets design size.
Method the most according to claim 1, wherein, the thickness of described coating is 0.4-0.8mm.
Method the most according to claim 1 and 2, wherein, the linear velocity of described spraying is
40-60m/min。
Method the most according to claim 1 and 2, wherein, the linear velocity of described laser melting coating is
0.1-0.3m/s, cladding step pitch is 7-11mm.
Method the most according to claim 4, wherein, the linear velocity of described laser melting coating is
0.12-0.25m/s, cladding step pitch is 9.5-10.5mm.
Method the most according to claim 1 and 2, wherein, described coating is self-fluxing alloy coating
Or self-fluxing alloy with pottery composite coating；Containing fe-based alloy powder and nickel-base alloy in the most described coating
In powder at least one and containing Al2O3、TiO2With at least one in tungsten carbide.
Method the most according to claim 6, wherein, containing 12-15 in described fe-based alloy powder
The Si of B, 1-1.5 weight % of Mn, 0.5-1.1 weight % of Cr, 0.3-0.7 weight % of weight %,
The C and the Fe of surplus of Ni, 0.1-0.15 weight % of Mo, 3.5-4 weight % of 1.5-1.9 weight %.
Method the most according to claim 6, wherein, in terms of the total amount of described nickel-base alloy powder,
Described nickel-base alloy powder contains the tungsten carbide of Ni45 and 2-30 weight % of 70-98 weight %.
Method the most according to claim 1 and 2, wherein, the method includes: described in carrying out
Before roughening treatment, turning or method for grinding is used to remove the damage of waste and old mining machinery hydraulic cylinder outer round surface
Hinder at least one in layer, fatigue layer and strengthening layer.
Method the most according to claim 9, wherein, removes waste and old mining machinery hydraulic cylinder cylindrical
At least one in damage layer, fatigue layer and the strengthening layer on surface makes the waste and old mining machinery hydraulic pressure obtained
The little 0.2-1.5mm of radius of the radius ratio standard mining machinery hydraulic cylinder cylindrical of cylinder cylindrical.
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| CN109735841A (en) * | 2018-12-30 | 2019-05-10 | 盐城工学院 | A kind of preparation method of lightweight piling machine pile frame |
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