CN106283032B - 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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- CN106283032B CN106283032B CN201510275838.6A CN201510275838A CN106283032B CN 106283032 B CN106283032 B CN 106283032B CN 201510275838 A CN201510275838 A CN 201510275838A CN 106283032 B CN106283032 B CN 106283032B
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Abstract
The invention discloses a kind of methods that mining machinery hydraulic cylinder outer round surface remanufactures, this method comprises: (1) carries out roughening treatment to waste and old mining machinery hydraulic cylinder outer round surface using sand blasting unit；(2) use waste and old mining machinery hydraulic cylinder outer round surface prepares coating of the Supersonic Plasma Spraying after roughening, the coating with a thickness of 0.3-1.5mm；(3) cladding is carried out to the coating using laser melting coating, forms cladding layer；(4) clad layer surface is ground, so that obtained mining machinery hydraulic cylinder outer round surface meets design size.The present invention not only provides a kind of reproducing method 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 the advantages that quick, efficient and saves material.
Description
Technical field
The present invention relates to a kind of methods that mining machinery hydraulic cylinder outer round surface remanufactures.
Background technique
According to investigation and the relevant information of enterprise's feedback, due to the working environment very severe in coal mine, there are big
The SO of amount2、H2S、Cl-、SO4 2-Equal corrosive mediums, envionmental humidity is generally 75% or so, moreover, underground coal mine is forced to lead to
Wind, oxygen content is sufficient, and hydraulic cylinder outer round surface is easily caused to corrode and wear.
In addition, coal mine underground coal bed, structure is complicated, and hydraulic support deflection load-bearing stress, period be loaded, big gun is adopted or tomography etc. is severe
Operating condition happens occasionally, this can also be resulted in destructive impacts to hydraulic cylinder, eventually leads to hydraulic support failure.If the hydraulic cylinder that fails is straight
It connects to discard and will cause serious waste of material, using re-manufacturing technology can waste be changed into values by the hydraulic cylinder of failure turn, after remanufacturing
The performance of hydraulic cylinder can meet or exceed the performance of new hydraulic cylinder, realize the green utilization of material.
Common re-manufacturing technology has thermal spraying and cladding etc., using plasma spray technology to impaired hydraulic cylinder outer round surface
It is remanufactured, bond strength is generally lower.Due to often there is slack coal splashing etc. to impact hydraulic cylinder outer surface in mine,
Spray coating is easy to peel off in such circumstances, drastically influences the service life for remanufacturing hydraulic cylinder and industrial and mineral production safety.Existing skill
Art generally uses the method for laser melting coating to remanufacture impaired hydraulic cylinder outer round surface, the process can obtain compared with
Thick cladding layer, interface cohesion is reliable, but there is following clearly disadvantageous:
1) material consumption and waste are larger.Generally require to have the surface of 0.2mm or so strong on matrix in technical standard
Job requirement can be met by changing layer, and for existing laser melting coating using the method for the cladding in powder feeding, cladding layer Pingdu difference is big, causes
Make cladding layer that must have biggish thickness with guarantee turning and grinding after working lining thickness, general cladding layer need to reserve 2mm a left side
Right machining allowance, causes very big material consumption and wastage；
2) existing laser cladding method low efficiency.Since cladding layer need to reserve larger thickness, cause the cladding time longer；By
Longer in the cladding time, inevitably there is thermal stress and a small amount of deformation in part, influence subsequent turning and grinding；
3) machining allowance is big.On the one hand since the cladding layer of existing laser cladding method preparation is thicker；On the other hand due to
Cladding low efficiency causes workpiece heated time long, and thermal stress is larger, and especially intensity is lower, structure is complex, thinner thickness
Part can be deformed, cladding layer must also be required to have biggish thickness in this way offset deformation.So larger in face of thickness
Cladding layer, post-processing when must use turnery processing, not only extend repair time, also result in and be difficult to select hardness higher
Material, limit cladding material range.
Therefore, needing to find at present a kind of can overcome the defect of the above-mentioned prior art and can have quick, efficient, section
The about new method for remanufacturing mining machinery hydraulic cylinder outer round surface of material.
Summary of the invention
The purpose of the present invention is overcoming the defect of prior art laser melting coating one-step method prepares coating, providing one kind can have
The method for thering is new mining machinery hydraulic cylinder outer round surface that is quick, efficient, saving material to remanufacture.
To achieve the goals above, the present invention provides a kind of method that mining machinery hydraulic cylinder outer round surface remanufactures, should
Method includes: that (1) uses sand blasting unit to carry out roughening treatment to waste and old mining machinery hydraulic cylinder outer round surface；(2) Supersonic is used
Fast plasma spray be coated in roughening after waste and old mining machinery hydraulic cylinder outer round surface prepares coating, the coating with a thickness of 0.3-
1.5mm；(3) cladding is carried out to the coating using laser melting coating, forms cladding layer；(4) clad layer surface is ground
It cuts, so that obtained mining machinery hydraulic cylinder outer round surface meets design size.
The above method of the invention can overcome the defect of prior art laser melting coating one-step method prepares coating, and both save
Material saves time, Reducing distortion, reduces machining allowance, reduce cost, increase coating material range；With thermal spraying one-step method
Prepares coating compares, moreover it is possible to the coating of mechanical bond be become metallurgical bonding, further increase the bond strength of coating, solve heat
Spraying can not remanufacture the deficiency of hydraulic cylinder outer circle.
Further, the present invention not only provides a kind of reproducing method of mining machinery hydraulic cylinder outer round surface, then makes
It makes product to reach, even better than new product performance, and the defect of existing surface strengthening technology can be overcome, have quickly, efficiently
The advantages of with material is saved.
Specifically, technique compared with the existing technology, method of the invention also have the advantage that
1) cover performance is good.The optional range of material is big, under preferable case, by the way that particularly addition is ceramic in cladding material
Coating hardness, wearability and corrosion resistance can be improved in phase, reliability and the service life for remanufacturing product is improved, so that remanufacturing production
Product reach, even better than new product performance；
2) material is saved.Using the preparation of Supersonic Plasma Spraying technique, the coating is uniform and compact, prepares the coating of 0.2mm
The machining allowance that 0.4mm or so need to only be reserved is saved compared with the laser melting coating of the prior art reserves the machining allowance of 2mm
Material；
3) the cladding time is short.The first step is relatively thin using the coating of Supersonic Plasma Spraying preparation, and uniform, fine and close, the
Lower power can be used when two step laser melting coatings and higher linear velocity realizes the remelting of coating, so that workpiece heat affecting is small,
It deforms small；
4) machining allowance is small.Since the thickness reserved in spraying process is smaller, in post-processing without turnery processing,
Grinding is directly carried out, the time is not only saved, harder material may be selected also to improve coating abrasion performance；
5) it is said from spray angle, improves the bond strength of spray coating, spray coating is enabled to can be applied to severe Minepit environment；
It is said from laser melting coating angle, that is, saves and remanufacture the time, and reduce cost；
6) sprayed on material is cheap.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of methods that mining machinery hydraulic cylinder outer round surface remanufactures, this method comprises: (1) uses
Sand blasting unit carries out roughening treatment to waste and old mining machinery hydraulic cylinder outer round surface；(2) using Supersonic Plasma Spraying thick
Waste and old mining machinery hydraulic cylinder outer round surface prepares coating after change, the coating with a thickness of 0.3-1.5mm；(3) using sharp
Light cladding carries out cladding to the coating, forms cladding layer；(4) clad layer surface is ground, so that obtained
Mining machinery hydraulic cylinder outer round surface meets design size.
In the present invention, the waste and old mining machinery hydraulic cylinder is that surface has damage and needs and be able to carry out to remanufacture
Mining machinery hydraulic cylinder, it is described waste and old merely to distinguishing shape of the mining machinery hydraulic cylinder before remanufacturing and after remanufacturing
State actually refers both to same mining machinery hydraulic cylinder.In the present invention, the mining machinery hydraulic cylinder remanufactured according to
It is the mining machinery hydraulic cylinder after remanufacturing after secondary completion Supersonic Plasma Spraying and laser melting coating, and completes Supersonic
It is waste and old mining machinery hydraulic cylinder before fast plasma spraying and laser melting coating.Those skilled in the art should not be construed as to this
The limitation of invention.
In the method for the invention, the concrete operations technique of the laser melting coating is well known to those skilled in the art, this
Details are not described herein for invention.
The above method of the invention have save material, save time, Reducing distortion, reduce machining allowance, reduce cost,
The advantages of increasing coating material range, moreover it is possible to the coating of mechanical bond be become into metallurgical bonding, further improve the knot of coating
Close intensity.
Method according to the present invention, it was found by the inventors of the present invention that when the coating is with a thickness of 0.4-0.8mm
When, the service performance etc. of the mining machinery hydraulic cylinder after what is obtained by means of the present invention remanufacture is optimal.
It was found by the inventors of the present invention that can be complete using the method for combining Supersonic Plasma Spraying with laser melting coating
When beauteously overcoming solely using Supersonic Plasma Spraying it is obtained remanufacture after mining machinery hydraulic cylinder disliked in environment
The coating of mechanical bond is become metallurgical bonding, further improves the knot of coating by the ineffective defect of bad underground coal mine
Intensity is closed, coating service life is extended；Overcome time-consuming when solely remanufacturing using laser melting coating, consumptive material, deform big, processing
The defects of surplus is big, and cladding material range is increased, improve the performance and service life of coating.
The method that mining machinery hydraulic cylinder outer round surface according to the present invention remanufactures, wherein the line of the spraying
Speed can be 40-60m/min.
The method that mining machinery hydraulic cylinder outer round surface according to the present invention remanufactures, wherein the laser melting coating
Linear velocity can be 0.1-0.3m/s；Preferably, the linear velocity of the laser melting coating is 0.12-0.25m/s.
The method that mining machinery hydraulic cylinder outer round surface according to the present invention remanufactures, wherein the laser melting coating
Cladding step pitch can be 7-11mm；Preferably, the cladding step pitch of the laser melting coating is 9.5-10.5mm.
In the method that mining machinery hydraulic cylinder outer round surface of the present invention remanufactures, do not have to the type of the coating
There is special restriction, method of the invention can be used for various coatings, however, in order to enable coating and waste and old mining machine
The bond strength of tool hydraulic cylinder outer round surface is stronger, and the preferably described coating of the present invention is self-fluxing alloy coating or self-fluxing alloy and pottery
The composite coating of porcelain.
It was found by the inventors of the present invention that when containing at least one of fe-based alloy powder and nickel-base alloy powder in the coating
And contain Al2O3、TiO2When at least one of tungsten carbide (WC), the cladding layer corrosion resistance that formed by the coating and wear-resisting
Property is higher, to improve the service life of cladding layer.
Further, as Mn, 0.5- of Cr, 0.3-0.7 weight % in the fe-based alloy powder containing 12-15 weight %
Ni, 0.1-0.15 weight % of Mo, 3.5-4 weight % of Si, 1.5-1.9 weight % of B, 1-1.5 weight % of 1.1 weight %
C and surplus Fe when, enabling to the cladding layer to be formed, the service life is longer.
Under preferable case, in terms of the total amount of the nickel-base alloy powder, when in the nickel-base alloy powder contain 70-98 weight %
Ni45 and 2-30 weight % tungsten carbide (WC) when, enabling to the cladding layer to be formed, the service life is longer.
The method that mining machinery hydraulic cylinder outer round surface according to the present invention remanufactures, this method further include: into
Before the row roughening treatment, using turning or method for grinding remove waste and old mining machinery hydraulic cylinder outer round surface damaging layer,
At least one of fatigue layer and strengthening layer.
A kind of preferred embodiment according to the present invention, mining machinery hydraulic cylinder outer round surface of the present invention
The method remanufactured includes:
(1) using turning or method for grinding remove the damaging layer of waste and old mining machinery hydraulic cylinder outer round surface, fatigue layer and
At least one of strengthening layer；
(2) roughening treatment is carried out to waste and old mining machinery hydraulic cylinder outer round surface using sand blasting unit；
(3) waste and old mining machinery hydraulic cylinder outer round surface prepares coating of the Supersonic Plasma Spraying after roughening is used,
The coating with a thickness of 0.3-1.5mm；
(4) cladding is carried out to the coating using laser melting coating, forms cladding layer；
(5) clad layer surface is ground, mining machinery hydraulic cylinder outer round surface is made to meet design size.
In the method that mining machinery hydraulic cylinder outer round surface of the present invention remanufactures, waste and old mining machine is preferably removed
At least one of damaging layer, fatigue layer and the strengthening layer of tool hydraulic cylinder outer round surface, so that obtained waste and old mining machinery liquid
The small 0.2-1.5mm of radius of the radius ratio standard hydraulic cylinder outer circle of cylinder pressure outer circle.
It in the method for the invention, can also include that may be present micro in the alignment waste and old mining machinery hydraulic cylinder
Deformation.
In the present invention, alcohol and/or acetone can also be used to carry out clearly waste and old mining machinery hydraulic cylinder outer round surface
It washes, removes the residual stains of waste and old mining machinery hydraulic cylinder outer round surface.
The above method of the invention had both saved material, and had saved time, Reducing distortion, reduce machining allowance, reduce cost, increase
Big coating material range, moreover it is possible to the coating of mechanical bond is become into metallurgical bonding, further improves the bond strength of coating, from
And extend the service life of coating.
Specifically, the above method of the invention has the advantage that
1) cover performance is good.The optional range of material is big, and by adding ceramic phase in cladding material, it is hard that coating can be improved
Degree, wearability and corrosion resistance reach, even to improve reliability and the service life for remanufacturing product so that remanufacturing product
Better than new product performance；
2) material is saved.Using the preparation of Supersonic Plasma Spraying technique, the coating is uniform and compact, such as prepares 0.2mm's
When coating, the machining allowance of 0.4mm or so need to be only reserved, the machining allowance of 2mm is reserved with the laser melting coating of the prior art
Compared to saving material；
3) the cladding time is short.The first step is relatively thin using the coating of Supersonic Plasma Spraying preparation, and uniform, fine and close, the
Lower power can be used when two step laser melting coatings and higher linear velocity realizes the remelting of coating, so that workpiece heat affecting is small,
It deforms small；
4) machining allowance is small.Since the thickness reserved in spraying process is smaller, in post-processing without turnery processing,
Grinding is directly carried out, the time is not only saved, harder material may be selected also to improve coating abrasion performance；
5) it is said from spray angle, improves the bond strength of spray coating, spray coating is enabled to can be applied to severe Minepit environment；
It is said from laser melting coating angle, that is, saves and remanufacture the time, and reduce cost.
6) sprayed on material is cheap.
The present invention will be described in detail by way of examples below.
In the examples below, used a variety of materials and instrument are all from commercially available.It is used in the following embodiment useless
The degree of wear of old hydraulic cylinder outer round surface is suitable.
Embodiment 1
The present embodiment is for illustrating the method that mining machinery hydraulic cylinder outer round surface of the invention remanufactures, specifically, this
The step of embodiment, is as follows:
1) fatigue layer for removing waste and old mining machinery hydraulic cylinder outer round surface, so that obtained waste and old mining machinery hydraulic cylinder
The small 0.5mm of radius of the radius ratio standard mining machinery hydraulic cylinder outer circle of outer circle；
2) using sand blasting unit (being purchased from Beijing Tian Ningxincheng Machinery Co., Ltd., model TNS-900, similarly hereinafter) to process
The waste and old mining machinery hydraulic cylinder outer round surface obtained after step 1) carries out roughening treatment；
3) the waste and old mining machinery hydraulic cylinder outer round surface system obtained after step 2) using Supersonic Plasma Spraying
Standby coating, the coating with a thickness of 0.7mm, the chemical composition of the coating is as shown in table 1, the Supersonic Plasma Spraying
Operating parameter it is as shown in table 2；
4) using laser melting coating to the coating of the mining machinery hydraulic cylinder outer round surface obtained after step 3) into
Row cladding forms cladding layer, wherein the linear velocity of the laser melting coating is 0.23m/s, and cladding step pitch is 10mm；
5) clad layer surface is ground, so that obtained mining machinery hydraulic cylinder outer round surface meets design
Size is (so that the size and standard mine of the mining machinery hydraulic cylinder outer round surface obtained after the method remanufactured through the invention
The size of mountain mechanical-hydraulic cylinder outer round surface is identical, similarly hereinafter).
Table 1
| Type | 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/L/min | Voltage/V | Electric current/A | Powder feeding rate/g/min |
| 120 | 150 | 380 | 180 |
It is cut to above-mentioned by mining machinery hydraulic cylinder obtained from remanufacturing, the items of sample after being cut to it
It can be carried out detection, and compared with the properties of stoste cylinder pressure material and pure spray coating, as a result, it has been found that, it is above-mentioned by making again
The Rockwell hardness of the cladding layer obtained after making is 48HRC, and stoste cylinder pressure new product coating Rockwell hardness is also 48HRC, cladding layer
Tissue and consistency and stoste cylinder pressure material proximate, porosity is less than pure spray coating；Cladding layer bond strength up to 200MPa,
With stoste cylinder pressure material proximate, the spray coating without re melting process only has 48Mpa；Using CETR company UMT-3 testing machine into
Row frictional wear experiment, friction parameter are frequency 10Hz, polishing scratch length 3mm, fraction time 20min, oil lubrication, measure two kinds it is molten
Coating wear volume is suitable, is 4 × 10-3mm3Left and right.In general, the hydraulic cylinder properties and new product remanufactured
Coating is close, and furthermore " two-step method " prepares that coating is relatively thin, the cladding time is shorter, powder waste is less, without turning process, whole
It improves efficiency, saved cost, better economy.
Embodiment 2
The present embodiment is for illustrating the method that mining machinery hydraulic cylinder outer round surface of the invention remanufactures, specifically, this
The step of embodiment, is as follows:
1) fatigue layer for removing waste and old mining machinery hydraulic cylinder outer round surface, so that obtained waste and old mining machinery hydraulic cylinder
The small 0.4mm of radius of the radius ratio standard mining machinery hydraulic cylinder outer circle of outer circle；
2) the waste and old mining machinery hydraulic cylinder outer round surface obtained after step 1) is roughened using sand blasting unit
Processing；
3) the waste and old mining machinery hydraulic cylinder outer round surface system obtained after step 2) using Supersonic Plasma Spraying
Standby coating, the coating with a thickness of 0.6mm, the chemical composition of the coating is as shown in table 3, the Supersonic Plasma Spraying
Operating parameter it is as shown in table 4；
4) using laser melting coating to the coating of the mining machinery hydraulic cylinder outer round surface obtained after step 3) into
Row cladding forms cladding layer, wherein the linear velocity of the laser melting coating is 0.25m/s, and cladding step pitch is 10.5mm；
5) clad layer surface is ground, so that obtained mining machinery hydraulic cylinder outer round surface meets design
Size.
Table 3
| Type | 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/L/min | Voltage/V | Electric current/A | Powder feeding rate/g/min |
| 100 | 150 | 380 | 180 |
It is cut to above-mentioned by mining machinery hydraulic cylinder obtained from remanufacturing, the items of sample after being cut to it
It can be carried out detection, and compared with the properties of stoste cylinder pressure material and pure spray coating, as a result, it has been found that, it is above-mentioned by making again
The Rockwell hardness of the cladding layer obtained after making is 49HRC；The tissue and consistency and stoste cylinder pressure material proximate of cladding layer；Cladding
Layer bond strength is up to 190MPa；Frictional wear experiment is carried out using the UMT-3 testing machine of CETR company, friction parameter is frequency
10Hz, polishing scratch length 3mm, fraction time 20min, oil lubrication, measuring coating wear volume is 4 × 10-3mm3Left and right.It is overall and
Speech, it is above-mentioned by remanufacturing resulting hydraulic cylinder in mining machinery hydraulic cylinder properties and embodiment 1 obtained from remanufacturing
It is close.
Embodiment 3
The present embodiment is for illustrating the method that mining machinery hydraulic cylinder outer round surface of the invention remanufactures, specifically, this
The step of embodiment, is as follows:
1) fatigue layer for removing waste and old mining machinery hydraulic cylinder outer round surface, so that obtained waste and old mining machinery hydraulic cylinder
The small 0.6mm of radius of the radius ratio standard mining machinery hydraulic cylinder outer circle of outer circle；
2) the waste and old mining machinery hydraulic cylinder outer round surface obtained after step 1) is roughened using sand blasting unit
Processing；
3) the waste and old mining machinery hydraulic cylinder outer round surface system obtained after step 2) using Supersonic Plasma Spraying
Standby coating, the coating with a thickness of 0.8mm, the coating is metal-cermic coating, and chemical composition is as shown in table 5, described
The operating parameter of Supersonic Plasma Spraying is as shown in table 6；
4) using laser melting coating to the coating of the mining machinery hydraulic cylinder outer round surface obtained after step 3) into
Row cladding forms cladding layer, wherein the linear velocity of the laser melting coating is 0.22m/s, and cladding step pitch is 9.5mm；
5) clad layer surface is ground, so that obtained mining machinery hydraulic cylinder outer round surface meets design
Size.
Table 5
Table 6
| Argon flow/L/min | Voltage/V | Electric current/A | Powder feeding rate/g/min |
| 125 | 150 | 380 | 180 |
It is cut to above-mentioned by mining machinery hydraulic cylinder obtained from remanufacturing, the items of sample after being cut to it
It can be carried out detection, and compared with the properties of stoste cylinder pressure material and pure spray coating, as a result, it has been found that, it is above-mentioned by making again
The Rockwell hardness of the cladding layer obtained after making is 50HRC；The tissue and consistency and stoste cylinder pressure material proximate of cladding layer；Cladding
Layer bond strength is up to 180MPa；Frictional wear experiment is carried out using the UMT-3 testing machine of CETR company, friction parameter is frequency
10Hz, polishing scratch length 3mm, fraction time 20min, oil lubrication, measuring coating wear volume is 3 × 10-3mm3Left and right.It is overall and
Speech, it is above-mentioned by remanufacturing resulting hydraulic cylinder in mining machinery hydraulic cylinder properties and embodiment 1 obtained from remanufacturing
Quite, and have the advantages that hardness is larger, wearability is preferable.
Embodiment 4
The present embodiment is for illustrating the method that mining machinery hydraulic cylinder outer round surface of the invention remanufactures, specifically, this
The method of embodiment is similar to the method for embodiment 1, unlike, the coating of the present embodiment with a thickness of 1mm.
It is cut to above-mentioned by mining machinery hydraulic cylinder obtained from remanufacturing, the items of sample after being cut to it
It can be carried out detection, and compared with the properties of stoste cylinder pressure material and pure spray coating, as a result, it has been found that, it is above-mentioned by making again
The Rockwell hardness of the cladding layer obtained after making is 45HRC；The tissue and consistency and stoste cylinder pressure material proximate of cladding layer；Cladding
Layer bond strength is up to 150MPa；Frictional wear experiment is carried out using the UMT-3 testing machine of CETR company, friction parameter is frequency
10Hz, polishing scratch length 3mm, fraction time 20min, oil lubrication, measuring coating wear volume is 4 × 10-3mm3Left and right.
Embodiment 5
The present embodiment is for illustrating the method that mining machinery hydraulic cylinder outer round surface of the invention remanufactures, specifically, this
The method of embodiment is similar to the method for embodiment 2, unlike, the present embodiment removes waste and old mining machinery hydraulic cylinder outer circle table
The fatigue layer in face, so that the half of the radius ratio standard mining machinery hydraulic cylinder outer circle of obtained waste and old mining machinery hydraulic cylinder outer circle
The small 0.8mm of diameter.
It is cut to above-mentioned by mining machinery hydraulic cylinder obtained from remanufacturing, the items of sample after being cut to it
It can be carried out detection, and compared with the properties of stoste cylinder pressure material and pure spray coating, as a result, it has been found that, it is above-mentioned by making again
The Rockwell hardness of the cladding layer obtained after making is 45HRC；The tissue and consistency and stoste cylinder pressure material proximate of cladding layer；Cladding
Layer bond strength is up to 170MPa；Frictional wear experiment is carried out using the UMT-3 testing machine of CETR company, friction parameter is frequency
10Hz, polishing scratch length 3mm, fraction time 20min, oil lubrication, measuring coating wear volume is 4 × 10-3mm3Left and right.
Embodiment 6
The present embodiment is for illustrating the method that mining machinery hydraulic cylinder outer round surface of the invention remanufactures, specifically, this
The method of embodiment is similar to the method for embodiment 3, unlike, the linear velocity of the laser melting coating of the present embodiment is 0.1m/s.
It is cut to above-mentioned by mining machinery hydraulic cylinder obtained from remanufacturing, the items of sample after being cut to it
It can be carried out detection, and compared with the properties of stoste cylinder pressure material and pure spray coating, as a result, it has been found that, it is above-mentioned by making again
The Rockwell hardness of the cladding layer obtained after making is 45HRC；The tissue and consistency and stoste cylinder pressure material proximate of cladding layer；Cladding
Layer bond strength is up to 150MPa；Frictional wear experiment is carried out using the UMT-3 testing machine of CETR company, friction parameter is frequency
10Hz, polishing scratch length 3mm, fraction time 20min, oil lubrication, measuring coating wear volume is 3 × 10-3mm3Left and right.
Embodiment 7
The present embodiment is for illustrating the method that mining machinery hydraulic cylinder outer round surface of the invention remanufactures, specifically, this
The method of embodiment is similar to the method for embodiment 6, unlike, the cladding step pitch of the laser melting coating of the present embodiment is 11mm.
It is cut to above-mentioned by mining machinery hydraulic cylinder obtained from remanufacturing, the items of sample after being cut to it
It can be carried out detection, and compared with the properties of stoste cylinder pressure material and pure spray coating, as a result, it has been found that, it is above-mentioned by making again
The Rockwell hardness of the cladding layer obtained after making is 45HRC；The tissue and consistency and stoste cylinder pressure material proximate of cladding layer；Cladding
Layer bond strength is up to 130MPa；Frictional wear experiment is carried out using the UMT-3 testing machine of CETR company, friction parameter is frequency
10Hz, polishing scratch length 3mm, fraction time 20min, oil lubrication, measuring coating wear volume is 3 × 10-3mm3Left and right.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (7)
1. a kind of method that mining machinery hydraulic cylinder outer round surface remanufactures, which is characterized in that this method comprises: (1) is using spray
Sand device carries out roughening treatment to waste and old mining machinery hydraulic cylinder outer round surface；(2) it is being roughened using Supersonic Plasma Spraying
Waste and old mining machinery hydraulic cylinder outer round surface prepares coating afterwards；(3) cladding is carried out to the coating using laser melting coating, is formed
Cladding layer；(4) clad layer surface is ground, so that obtained mining machinery hydraulic cylinder outer round surface meets design
Size；
Wherein, the coating with a thickness of 0.4-0.8mm；
The linear velocity of the spraying is 40-60m/min；
The linear velocity of the laser melting coating is 0.12-0.25m/s, and cladding step pitch is 9.5-10.5mm.
2. according to the method described in claim 1, wherein, the coating is that self-fluxing alloy coating or self-fluxing alloy are answered with ceramic
Close coating.
3. according to the method described in claim 1, wherein, in the coating containing in fe-based alloy powder and nickel-base alloy powder extremely
Lack one kind and contains Al2O3、TiO2At least one of with tungsten carbide.
4. according to the method described in claim 3, wherein, Cr, 0.3- containing 12-15 weight % in the fe-based alloy powder
Mo, 3.5-4 weight % of Si, 1.5-1.9 weight % of B, 1-1.5 weight % of Mn, 0.5-1.1 weight % of 0.7 weight %
Ni, 0.1-0.15 weight % C and surplus Fe.
5. according to the method described in claim 3, wherein, in terms of the total amount of the nickel-base alloy powder, in the nickel-base alloy powder
The tungsten carbide of Ni45 and 2-30 weight % containing 70-98 weight %.
6. according to the method described in claim 1, wherein, this method comprises: before carrying out the roughening treatment, using turning
Or method for grinding removes at least one of damaging layer, fatigue layer and the strengthening layer of waste and old mining machinery hydraulic cylinder outer round surface.
7. according to the method described in claim 6, wherein, the damaging layer, tired of waste and old mining machinery hydraulic cylinder outer round surface is removed
The radius ratio standard mining machinery for the waste and old mining machinery hydraulic cylinder outer circle that at least one of labor layer and strengthening layer make
The small 0.2-1.5mm of the radius of hydraulic cylinder outer circle.
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| CN110699626A (en) * | 2019-10-24 | 2020-01-17 | 中国科学院宁波材料技术与工程研究所 | Laser remelting method of thermal spraying metal ceramic coating for cavitation erosion resistance |
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| CN102268626A (en) * | 2010-06-01 | 2011-12-07 | 上海工程技术大学 | Method for metal surface modification |
| CN202366947U (en) * | 2011-11-16 | 2012-08-08 | 景德镇陶瓷学院 | Hot roll with composite lubricating abrasion-proof coating |
| CN102728993A (en) * | 2012-06-14 | 2012-10-17 | 燕山大学 | Method for repairing roller sleeve of continuous casting roller |
| CN104043941A (en) * | 2014-06-23 | 2014-09-17 | 河南伟彤科技股份有限公司 | Re-manufacturing machining process of surface of inner hole of hydraulic cylinder scrap guide sleeve |
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|---|---|---|---|---|
| CN102268626A (en) * | 2010-06-01 | 2011-12-07 | 上海工程技术大学 | Method for metal surface modification |
| CN202366947U (en) * | 2011-11-16 | 2012-08-08 | 景德镇陶瓷学院 | Hot roll with composite lubricating abrasion-proof coating |
| CN102728993A (en) * | 2012-06-14 | 2012-10-17 | 燕山大学 | Method for repairing roller sleeve of continuous casting roller |
| CN104043941A (en) * | 2014-06-23 | 2014-09-17 | 河南伟彤科技股份有限公司 | Re-manufacturing machining process of surface of inner hole of hydraulic cylinder scrap guide sleeve |
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