CN107891198A - The preparation method of metal parts hydrophobic surface - Google Patents
The preparation method of metal parts hydrophobic surface Download PDFInfo
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- CN107891198A CN107891198A CN201711122882.9A CN201711122882A CN107891198A CN 107891198 A CN107891198 A CN 107891198A CN 201711122882 A CN201711122882 A CN 201711122882A CN 107891198 A CN107891198 A CN 107891198A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/008—Surface roughening or texturing
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- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Present invention is disclosed a kind of preparation method of metal parts hydrophobic surface, including：Positive polarity processing is carried out to metal parts by spark-erosion sinking machine, wherein, there is the conductive matter being uniformly blended into according to setting ratio, and the sub-micron or nano level metal powder of high rigidity metal carbides ceramics can be formed in electric spark oil；When the micro-structural on metal parts surface is worked into set depth, the processing polarity of spark-erosion machine tool is arranged to negative polarity, and adjusts machined parameters, implements the processing of electric spark negative polarity to metal parts, until micro-structural machines.The metal parts surface strength of the preparation method processing of metal parts hydrophobic surface of the present invention is high, and the hydrophobic or super hydrophobic surface of metal parts can be made more durable, be not easy wear out failure；It is high that constituency processing processing flexibility can be carried out to metal parts surface；Large scale metal parts surface can be processed by way of machining area splicing；Technique is relatively easy, and equipment requirement is low, strong applicability.
Description
Technical field
The present invention relates to metal parts processing method field, especially relates to a kind of system of metal parts hydrophobic surface
Preparation Method.
Background technology
Wetability is one of critical nature of the surface of solids, and generally use contact angle is weighed, when more than 90 ° to be hydrophobic
Surface, it is super hydrophobic surface during more than 150 °.Hydrophobic and super hydrophobic surface has the spy such as automatically cleaning, drag reduction, corrosion-resistant, freezing
Different performance, at the same time, metal are one of the most commonly used materials of industrial production, and most of mechanized equipment and parts are all
Manufactured using metal.Therefore, manufacture has the hydrophobic and metallic element of superhydrophobic surface behavior for automatically cleaning, antifog, anti-
Icing frosting, corrosion-resistant, responding to switch, water-oil separating, great loading capacity marine equipment, the lossless transfer of liquid, liquid transporting, blood
The application of the association areas such as compatible material has particularly important realistic meaning and application value.
Existing literature shows that the hydrophobicity of material depends primarily on the collective effect of the factor of two aspects, i.e. material sheet
The surface energy and material surface micro-structural of body.The surface energy of metal material is universal higher, therefore is usually expressed as water-wet behavior.Mesh
Before, the preparation method of metal parts super hydrophobic surface mainly includes anodizing, electrochemical deposition method, chemical corrosion method, change
Learn sedimentation, template, a step infusion method, composite coating method, molecular self-assembling method and Wire EDM method etc..
Also there are many weak points in the preparation method of existing metal material super hydrophobic surface, cause to have hydrophobic or super
The metal parts of hydrophobic property is manufactured by very big restriction, it is difficult to carries out industrialization promotion.It is mainly reflected in following
Aspect：
1st, surface strength is low, easily abrasion or spalling failure；
2nd, technique is more complicated, and manufacturing cost is higher；
3rd, manufacture efficiency is low, is not suitable for high-volume and manufactures or process large scale metal parts；
4th, craft flexibility is poor, and its process is limited by substrate surface shape and structure, or is difficult to specific region
Carry out selective processing.
The content of the invention
The main object of the present invention is to provide a kind of preparation method of the high metal parts hydrophobic surface of surface strength.
The present invention proposes a kind of preparation method of metal parts hydrophobic surface, including：
Positive polarity processing is carried out to metal parts by spark-erosion sinking machine, wherein, have in electric spark oil according to setting
The mixed conductive matter of ratio uniform, and the sub-micron or nanometre metal powder of high rigidity metal carbides ceramics can be formed
End；
When the micro-structural on metal parts surface is worked into set depth, the processing polarity of spark-erosion machine tool is arranged to negative
Polarity, and machined parameters are adjusted, implement the processing of electric spark negative polarity to metal parts, until micro-structural machines.
Further, when the micro-structural on metal parts surface is close to be fully formed, spark-erosion machine tool is arranged to negative pole
Property, and machined parameters are adjusted, implement the processing of electric spark negative polarity to metal parts, until including after the step of machining：
The metal parts surface machined is cleared up.
Further, metal dust includes one or more in W, Ti and Cr.
Further, a diameter of 100-300nm of the particle in metal dust.
Further, a diameter of 200nm of the particle in metal dust.
Further, metal dust is mixed into electric spark oil with 20g/L ratio.
Further, metal dust is evenly spread in electric spark oil by ultrasonic stirrer.
Further, micro-structural is very low power that is wide 100 μm, deep 100 μm, being spaced 100 μm；Set depth is 90 μm.
Further, micro-structural electrode surface shape is mutually fitted with the microstructure aspects in the corresponding region of metal parts surface
Match somebody with somebody.
Further, by micro-structural electrode clamping on spark-erosion sinking machine, and with the work surface pair of metal parts
Also include before positive step：
The surface profile of metal parts is divided into one or more profile identical contour areas, confirms micro-structural electrode
Surface profile, the surface profile of micro-structural electrode are identical with contour area；
Designed according to the surface micro-structure for realizing hydrophobic effect of metal parts, confirm the surface micro-structure of micro-structural electrode
Design, the surface micro-structure of micro-structural electrode and the surface micro-structure of contour area match；
Electrode material is cut into the micro-structural electrode block to match with contour area；
Surface micro-structure is manufactured on the machined surface of micro-structural electrode block, obtains micro-structural electrode.
The metal parts surface strength of the preparation method processing of metal parts hydrophobic surface of the present invention is high, can make metal zero
The hydrophobic or super hydrophobic surface of part is more durable, is not easy wear out failure；And the metal with curved surface or inner-cavity structure can be processed
Part flexibility (adaptability) of operation is strong；It is high that constituency processing processing flexibility can be carried out to metal parts surface；It can be spelled by machining area
The mode connect processes large scale metal parts surface；Technique is relatively easy, and equipment requirement is low, strong applicability.
Brief description of the drawings
Fig. 1 is the step schematic diagram of the embodiment of preparation method one of metal parts hydrophobic surface of the present invention；
Fig. 2 is the step schematic diagram of another embodiment of preparation method of metal parts hydrophobic surface of the present invention；
Fig. 3 is the step schematic diagram of the preparation method 3rd embodiment of metal parts hydrophobic surface of the present invention；
Fig. 4 is the structural representation of the embodiment of micro-structural electrode one；
Fig. 5 is the schematic flow sheet to metal parts processing；
Fig. 6 is to the structural representation after metal parts Surface Machining in an embodiment；
Fig. 7 is the structural representation of the embodiment of metal parts hydrophobic surface one.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Reference picture 1, the embodiment of preparation method one of metal parts hydrophobic surface of the present invention, including：
S10, by spark-erosion sinking machine to metal parts 2 carry out positive polarity processing, wherein, in electric spark oil 3 have press
The conductive matter being uniformly blended into according to setting ratio, and the sub-micron or nanoscale of high rigidity metal carbides ceramics can be formed
Metal dust.
S20, when the micro-structural on the surface of metal parts 2 is worked into set depth, the processing polarity of spark-erosion machine tool is set
Negative polarity is set to, and adjusts machined parameters, implements the processing of electric spark negative polarity to metal parts 2, until micro-structural machines.
In above-mentioned steps S10, when spark-erosion sinking machine carries out positive polarity processing to metal parts, spark-erosion sinking machine
The processing end face of micro-structural electrode 1 includes the structure to match with multiple micro-structurals；Micro-structural electrode 1 can be that copper and copper close
The materials such as gold, steel, molybdenum, tungsten and tungsten alloy；Metal dust includes one or more materials, and metal dust is evenly distributed on electric spark
Electric Field Distribution is uniform when can make electrical discharge machining in oil 3；When spark discharge is processed, micro-structural electrode 1 uses past up and down
Compound processing；During spark-erosion sinking, the top layer of metal parts 2 can form white re cast layer under spark discharge effect, should
Re cast layer has higher hardness and wearability, and its surface can form the pit of micron or submicron order during galvanic corrosion
Structure, secondary microstructure can be formed, further enhance the surface hydrophobic of metal parts 2.
Please with reference to Fig. 7, in above-mentioned steps S20, when spark discharge is processed, nanometer powder is introduced into electric spark
In processing technology, in-situ synthesized reaction is brought it about, generates tiny cermet particles, and is attached to electric spark re cast layer table
Face, nanoscale microprotrusion structure is formed, further enhances the surface hydrophobicity of metal parts 2 and antiwear characteristic；By rougher weight
Cast layer, is converted into active factor, and the surface of metal parts 2 has millimetre-sized very low power, micron-sized nick hole 4 and nanoscale
The three-level micro-structurals such as granular microprotrusion 5.
To reduce export license, the surface abrasion resistance of reinforced metal part 2 and further increasing the secondary micro-structural of re cast layer
Sub-micron or nano level metal powder are incorporated into electric spark processing liquid by scale and density, the present invention, make metal dust and electricity
Reaction in-situ, the more tiny cermet particles of generation occur for caused carbon slag during spark discharge, and are attached to metal
The surface of part 2, increase sub-micron and nano level graininess microprotrusion 5 on the basis of two level micron micro-structural, and then make gold
Belong to part 2 surface to be formed from grade, micron order to nano level multistage microstructural is hydrophobic or super hydrophobic surface.At the same time,
Tiny hard cermet particles be attached to workpiece surface can greatly reinforced metal part 2 surface abrasion resistance, make metal
The hydrophobic performance of part 2 is more stable and reliable.
Please with reference to Fig. 4-6, in certain embodiments, micro-structural electrode 1 and the microstructure aspects on the surface of metal parts 2
It is inconsistent, it is necessary to multiple micro-structurals constitute overlapping, therefore after obtaining micro-structural after above-mentioned steps S10-S20 post-processings,
Need rotating metallic part 2 to arrive set angle, micro- knot final in setting regions can be just accessed after repeat step S10-S20
Structure.
The preparation method of the hydrophobic surface of metal parts 2 of the present invention can be by the surface segmentation of metal parts 2 into multiple identical
Machining area, such as the 80 × 80mm of profile in face to be processed, be divided into 16 machining areas that area is 20 × 20mm,
It is 20 × 20mm to design electrode machining contour area, is shaped as plane；Multiple regions are processed respectively, multiple machining areas can be with
Complete hydrophobic surface is combined into, constituency processing can be carried out to the surface of metal parts 2, processing flexibility is high, can pass through processing district
The mode of domain splicing processes the surface of large scale metal parts 2, and can process the metal parts 2 with curved surface or inner-cavity structure,
Flexibility (adaptability) of operation is strong；And technique is relatively easy, equipment requirement is low, strong applicability.
Please with reference to Fig. 2, include after step S20：
S30, the surface of metal parts 2 machined is cleared up.
In above-mentioned steps S30, metal parts 2 is cleared up by way of cleaning, is obtained hydrophobic or super with micro-structural
Hydrophobic metal part 2, simple to operate, cleaning cost is cheap.
In certain embodiments, metal dust includes one or more in W, Ti and Cr.
In the present embodiment, metal dust includes Ti.
In certain embodiments, a diameter of 100-300nm of the particle in metal dust.
In the present embodiment, a diameter of 200nm of the particle in metal dust.
In the present embodiment, metal dust is mixed into electric spark oil 3 with 20g/L ratio.
In the present embodiment, metal dust is evenly spread in electric spark oil 3 by ultrasonic stirrer, metal dust distribution
Uniformly.
In the present embodiment, micro-structural is very low power that is wide 100 μm, deep 100 μm, being spaced 100 μm；When the table of metal parts 2
The set depth of the micro-structural processing in face is 90 μm.
The surface configuration of micro-structural electrode 1 is adapted with the microstructure aspects in the surface corresponding region of metal parts 2.
Please with reference to Fig. 3, also include before step S10：
S01, the surface profile of metal parts 2 is divided into one or more profile identical contour areas, confirms micro-structural
The surface profile of electrode 1, the surface profile of micro-structural electrode 1 are identical with contour area；
S02, the surface micro-structure for the realizing hydrophobic effect design according to metal parts 2, confirm the surface of micro-structural electrode 1
Microstructure design, the surface micro-structure of micro-structural electrode 1 and the surface micro-structure of contour area match；
S03, electrode material is cut into the micro-structural electrode block to match with contour area；
S04, surface micro-structure is manufactured on the machined surface of micro-structural electrode block, obtain micro-structural electrode 1.
In above-mentioned steps S01, contour area can be square, rectangle, rhombus etc., the surface of metal parts 2 by
Multiple contour areas are spliced to form.
In above-mentioned steps S02, surface micro-structure can be latticed groove to realize in certain embodiments, because
The micro-structural of this finished surface of micro-structural electrode 1 is the projection of matching groove, and groove is correspondingly processed in electrical spark working man-hour, convex
It both can be grid type to play distribution, for disposably processing；Can also multiple projections arranged in parallel, process several times
Latticed groove.
In above-mentioned steps S03, micro-structural electrode block passes through machining or the special process；Machining refers to machining etc.
Machining mode；The special process refers to the processing modes such as electrical discharge machining, corrosion processing；The cross section of micro-structural electrode block
Profile with the profile at position to be processed is same or like on metal parts 2 in this processing.
In above-mentioned steps S04, by Wire EDM, accurate grinding or multilayer copper foil layered manufacturing in micro-structural electricity
Surface micro-structure is manufactured on the machined surface of pole block.
The surface strength of metal parts 2 of the preparation method processing of the hydrophobic surface of metal parts 2 of the present invention is high, can make metal
The hydrophobic or super hydrophobic surface of part 2 is more durable, is not easy wear out failure；And the gold with curved surface or inner-cavity structure can be processed
Belong to part 2, flexibility (adaptability) of operation is strong；Constituency processing can be carried out to the surface of metal parts 2, processing flexibility is high；Processing can be passed through
The mode of region splicing processes the surface of large scale metal parts 2；Technique is relatively easy, and equipment requirement is low, strong applicability.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, every utilization
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
- A kind of 1. preparation method of metal parts hydrophobic surface, it is characterised in that including：Positive polarity processing is carried out to the metal parts by spark-erosion sinking machine, wherein, have in electric spark oil according to setting The mixed conductive matter of ratio uniform, and the sub-micron or nanometre metal powder of high rigidity metal carbides ceramics can be formed End；When the micro-structural on metal parts surface is worked into set depth, the processing polarity of spark-erosion machine tool is arranged to negative pole Property, and machined parameters are adjusted, implement the processing of electric spark negative polarity to metal parts, until micro-structural machines.
- 2. the preparation method of metal parts hydrophobic surface according to claim 1, it is characterised in that described to work as metal parts Spark-erosion machine tool is arranged to negative polarity by the micro-structural on surface close to when being fully formed, and adjusts machined parameters, to metal parts Implement the processing of electric spark negative polarity, until including after the step of machining：The metal parts surface machined is cleared up.
- 3. the preparation method of metal parts hydrophobic surface according to claim 1, it is characterised in that the metal dust bag Include one or more in W, Ti and Cr.
- 4. the preparation method of metal parts hydrophobic surface according to claim 1, it is characterised in that in the metal dust Particle a diameter of 100-300nm.
- 5. the preparation method of metal parts hydrophobic surface according to claim 4, it is characterised in that in the metal dust Particle a diameter of 200nm.
- 6. the preparation method of metal parts hydrophobic surface according to claim 1, it is characterised in that the metal dust with 20g/L ratio is mixed into electric spark oil.
- 7. the preparation method of metal parts hydrophobic surface according to claim 1, it is characterised in that the metal dust by Ultrasonic stirrer is evenly spread in electric spark oil.
- 8. the preparation method of metal parts hydrophobic surface according to claim 1, it is characterised in that the micro-structural is width 100 μm, very low power that is deep 100 μm, being spaced 100 μm；The set depth is 90 μm.
- 9. the preparation method of metal parts hydrophobic surface according to claim 1, it is characterised in that the micro-structural electrode Surface configuration is adapted with the microstructure aspects in the corresponding region of the metal parts surface.
- 10. the preparation method of metal parts hydrophobic surface according to claim 1, it is characterised in that described by micro-structural Electrode clamping on spark-erosion sinking machine, and the step of aligned with the work surface of metal parts before also include：The surface profile of metal parts is divided into one or more profile identical contour areas, confirms the surface of micro-structural electrode Profile, the surface profile of the micro-structural electrode are identical with the contour area；Designed according to the surface micro-structure for realizing hydrophobic effect of metal parts, confirm that the surface micro-structure of micro-structural electrode is set Meter, the surface micro-structure of the surface micro-structure and the contour area of the micro-structural electrode match；Electrode material is cut into the micro-structural electrode block to match with the contour area；Surface micro-structure is manufactured on the machined surface of the micro-structural electrode block, obtains micro-structural electrode.
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Cited By (3)
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| CN110124965A (en) * | 2019-06-13 | 2019-08-16 | 哈尔滨工业大学 | A kind of electrical discharge machining and the compound method for preparing super-hydrophobic surface of spray coating method |
| CN113478033A (en) * | 2021-07-02 | 2021-10-08 | 长春理工大学 | Gradient effect-based multi-liquid-phase low-viscosity self-cleaning stainless steel surface preparation method |
| CN115007957A (en) * | 2022-06-24 | 2022-09-06 | 南京航空航天大学 | Liquid bridge constrained electrochemical machining method for complex three-dimensional microstructure array |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110124965A (en) * | 2019-06-13 | 2019-08-16 | 哈尔滨工业大学 | A kind of electrical discharge machining and the compound method for preparing super-hydrophobic surface of spray coating method |
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| CN113478033B (en) * | 2021-07-02 | 2023-01-17 | 长春理工大学 | Gradient effect-based multi-liquid-phase low-viscosity self-cleaning stainless steel surface preparation method |
| CN115007957A (en) * | 2022-06-24 | 2022-09-06 | 南京航空航天大学 | Liquid bridge constrained electrochemical machining method for complex three-dimensional microstructure array |
| CN115007957B (en) * | 2022-06-24 | 2023-07-07 | 南京航空航天大学 | Liquid bridge constrained electrochemical machining method for complex three-dimensional microstructure array |
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