CN201046996Y - Apparatus for preparing metal surface abrasion self-repairing coating - Google Patents
Apparatus for preparing metal surface abrasion self-repairing coating Download PDFInfo
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- CN201046996Y CN201046996Y CNU2007200129751U CN200720012975U CN201046996Y CN 201046996 Y CN201046996 Y CN 201046996Y CN U2007200129751 U CNU2007200129751 U CN U2007200129751U CN 200720012975 U CN200720012975 U CN 200720012975U CN 201046996 Y CN201046996 Y CN 201046996Y
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Abstract
A metal surface wear self-repair coating preparation device pertains to the technical field of material surface engineering technology. The utility model adopts an ultra-high frequency pulse plating method, and the surfaces of metal parts can obtain a composite coating which is composed of iron and the alloys, as well as magnesium silicate hydroxy and other micro-mineral particles. The materials of the mineral particles on the composite coating surface are smashed during the friction process and undergone the displacement reaction with the Fe-based metals on the friction surface, so the utility model can continuously generate a dense Fe-based silicate metal ceramic layer, restore the size of the worn parts partially or completely, complete the self-repair of the worn parts during the dynamic operational process of the parts and significantly prolong the service life of the parts. The wear ratio of the surface coating is reduced by more than 15 percent compared with the substrate. The hardness and the fineness of the friction surface are improved, and the friction coefficient is greatly reduced simultaneously. The utility model is mainly applicable to the field of metal wear self-repair.
Description
Technical field
The utility model relates to a kind of abrasion self-repairing plating coat on surface of metal preparation and part repair technology, belongs to the material surface engineering technical field.
Background technology
Wearing and tearing are one of the main reasons that mechanical component lost efficacy, and are annual in the world because the loss that wearing and tearing cause is very huge.In the material surface engineering field, mainly concentrate both ways in the research that improves the friction pair life-span both at home and abroad: the one, improve steel components surface microstructure or composition; The 2nd, by interpolation lubricant or lubricating oil, or at surface of friction pair generation solid lubricant film.Realize that mechanical component frictional wear selfreparing is the important goal of materialogy and tribology Design.
The galling self-repair technology is to be proposed by The former Russian scholar the seventies in 20th century, and this technology was introduced into China and has obtained positive effect in engineering experiment was used last century Mo, was a brand-new Surface Engineering and green remanufacturing technology.
So-called galling self-repair technology is meant that adopting metal or nonmetal fine particle to add in oil product and the lubricating grease uses, and can generate the selfreparing protective film under the frictional wear condition on machinery part surface.The self-repair material that wherein causes extensive concern is that main component is that serpentine (hydroxyl magnesium silicate) is the lubricating oil additive that main multiple complex component constitutes, because selfreparing is actually a kind of condition selfreparing, and is closely related with friction pair relative movement and lubricant.The replacement(metathesis)reaction whether mineral grain in the lubricant medium and metallic surface have self-repair function depends on various procedures and condition in the friction process, the stable inadequately phenomenon of actual effect of its application therefore occurs.This technology is subjected to the restriction of friction pair shape and friction condition in addition, and application surface is limited.And utilize the matrix material that contains selfreparing mineralogical composition to improve the steel components surface composition, and the technology of realization wearing and tearing selfreparing is not then appeared in the newspapers.
Summary of the invention
The purpose of this utility model just provides a kind of metallic surface composite plating coat material that possesses the wearing and tearing self-repair function, make metal parts be in operation and to realize the selfreparing of wearing and tearing, in the work-ing life of significant prolongation part, the while can significantly be reduced the abrasion self-repairing plating coat on surface of metal preparation facilities of the frictional coefficient between the friction pair.
Technical conceive of the present utility model is, the selfreparing mineral additive is directly added metallic matrix, make mineral grain in matrix, exist with the mixture form, guarantee in process of friction and wear, the sudden strain of a muscle temperature that produces during the micro-bulge contact, make magnesium atom and the iron atom in metallic matrix of particle in mutually that uniform replacement(metathesis)reaction take place, finally generate ceramic layer with self-repair function at friction surface.
Adopt the ultra-high frequency pulse plating method, obtain the composite deposite that iron and little mineral grain such as alloy and hydroxyl magnesium silicate thereof constitute on the metal parts surface.This composite deposite surface is in friction process, the mineral grain material is pulverized and is produced replacement(metathesis)reaction with ferrous metals on the surface of friction, can continue to generate fine and close iron-based silicate metal ceramic layer and can partly or entirely recover the abrading section size, in part operation dynamic process, finish the selfreparing of abrading section, the work-ing life of significant prolongation part.The overlay coating wear rate reduces more than 15% than matrix.Simultaneously, friction surface hardness and smooth finish improve, and frictional coefficient reduces significantly.
Know-why of the present utility model is, serpentine, and promptly hydroxyl magnesium silicate belongs to 1: 1 type trioctahedron stratiform hydrosilicate, and desirable molecular formula is Mg
3(Si
2O
5) (OH)
4, the crystal structure formula is 3MgO2SiO
22H
2O, wherein water of constitution mainly is present in the octahedral sheet of crystalline structure unit layer with the form of hydroxyl.Serpentine has very high activity, mainly is that serpentine exists many active groups, promptly O-Si-O key, Si-O-Si key, contain magnesium key class, hydroxyl and hydrogen bond.O-Si-O key particularly, this key easily ruptures when high temperature.After the covalent linkage fracture of oxygen and silicon, can produce two kinds of oxygen: O
*-And O,
*Expression has 1 not duplet electron, easily forms the high oxidation state oxide ceramics structure of covalent bond type with metal.
In the material friction process, can from matrix material, discharge based on the complicated inorganic ore composition of hydroxyl magnesium silicate, under the frictional force effect, pulverize and be uniformly distributed in the irony matrix surface, contact with the iron matrix Base Metal is full and uniform.Simultaneously, in process of friction and wear, the sudden strain of a muscle temperature that produces when fracture takes place micro-bulge makes the magnesium atom and the iron atom generation replacement(metathesis)reaction of metal surface in the particulate crystal, at the new crystal of friction surface generation ferrosilicate.Under the effect of frictional energy, new crystal constantly increases at friction surface, has finally formed the wear-resistant protective layer that becomes the chemical bond combination with ferrous metals.
These silicate materials form crystal at metal material surface under High Temperature High Pressure, because serpentine and transformation product thereof all are laminate structure, the changing of the relative positions easily takes place in interlayer under stress, so frictional coefficient is very little, greatly reduces the frictional wear between the friction pair.
The thickness of upper layer is not linear growth, the formation speed of protective layer and thickness are directly proportional with the quantity that the energy and the mineral grain of friction release discharge, it is but self-regulating: when wearing and tearing take place, frictional energy increases, the complex series of reactions that mineral material and surface of friction pair take place begins to carry out, and protective film begins growth simultaneously; And when polishing scratch obtained to repair, the frictional energy that intermetallic discharges reduced, and the series reaction of mineral material and surface of friction pair will stop, and protective film also just no longer thickens.Therefore, the position that chemistry reflection generation protective layer takes place the renovation agent particulate is selectively, and it only takes place on the position of galling.
Technical characterstic of the present utility model is, selfreparing is actually a kind of condition selfreparing, and it and friction pair relative movement and lubricant are closely related.Adopt the hydroxyl magnesium silicate particle to comprise as the surface filming process of lubricating oil additive:
(1) self-repair material is in the metallic surface physical adsorption;
(2) self-repair material is in the metallic surface chemisorption;
(3) self-repair material is in metallic surface film forming and surperficial homogenizing.
Has the matrix material that hydroxyl magnesium silicate is the master and adopt, the hydroxyl magnesium silicate mineral facies will directly be born the extruding of surperficial micro-bulge and the high pressure that the swiping effect forms in friction process, the mineral grain material is sheared and pulverizes, and contacts with the iron matrix Base Metal is full and uniform; While makes that owing to surface contact and fricative sudden strain of a muscle temperature ferrous metals generation thermochemistry and the power chemical replacement on hydroxyl magnesium silicate mineral and the surface of friction reacted, and forms with respect to the stable more and uniform ferrosilicate ceramic layer of present technology.
It is that the compound of master is key of the present utility model mutually that preparation has hydroxyl magnesium silicate, adopt common smelting to prepare matrix, or the top coat that adopts thermospray or built-up welding to form, high temperature in technology can impel hydroxyl magnesium silicate to decompose, serpentine is 650～800 ℃ of temperature ranges under normal pressure, and hydroxyl takes off mistake gradually, reduce the mechanical property of matrix itself, and can't play the effect of surface friction wearing and tearing selfreparing.Select for use the composite plating technology preparation to have the overlay coating of self-repair function in this research, preparation process is carried out under normal temperature condition, has guaranteed that the hydroxyl magnesium silicate particle does not undergo phase transition, and the matrix of coating is a ferrous alloy, and matrix material is the hydroxyl magnesium silicate particle.
Technical solution of the present utility model is,
A kind of abrasion self-repairing plating coat on surface of metal preparation facilities is made of high frequency DC pulse electroplating power supply 1, voltmeter 2, reometer 3, mechanical stirrer 4, agitator speed controlling box 5, plating tank 6, anode 7, negative electrode 8, heating tube 9 and heating constant-temperature equipment 10.High frequency DC pulse electroplating power supply 1 parameter be 120～30V, 20kHz, can periodic reverse; The positive pole of high frequency DC pulse electroplating power supply 1 is connected with anode 7 through reometer 3, anode 7 is iron anodes, the negative pole of high frequency DC pulse electroplating power supply 1 is connected with negative electrode 8, negative electrode 8 is workpiece, be connected with voltmeter 2 between the positive and negative electrode of high frequency DC pulse electroplating power supply 1, mechanical stirrer 4 is connected with agitator speed controlling box 5, and anode 7, negative electrode 8 and mechanical stirrer 4 place in the plating tank 6, and the heating tube 9 in the plating tank 6 is connected with heating constant-temperature equipment 10.
A kind of abrasion self-repairing plating coat on surface of metal preparation method,
(1) the little mineral powder material of preparation: adopt mechanical ball milling to pulverize the little mineral grain of preparation in the utility model, prepared mineral grain diameter dimension scope is at 0.01～10 μ m, and alkaline purification, acid treatment and tensio-active agent treatment process are adopted in the surface.
(2) preparation composite plating solution: the ternary alloy that according to the requirement of different piece surfaces to the electrolytic coating body material, the utility model development is tapped a blast furnace, iron-phosphorus alloy, iron nickel alloy, iron-manganese alloy, fe-cr alloy and above element constitute and the composite plating solution of little mineral grain formation.Wherein three kinds of iron-hydroxyl magnesium silicate plating bath representative formulas and processing parameter are as follows:
Table 1 iron-hydroxyl magnesium silicate plating bath representative formula
| Composition and parameter | Prescription 1 | Prescription 2 | Prescription 3 |
| Iron(ic) chloride g/L | 400 | 40 | |
| Ferrous sulfate g/L | 240 | 250 | |
| Calcium chloride g/L | 300 | ||
| Ammonium chloride g/L | 20 | ||
| Little mineral grain g/L | 1～20 | 1～20 | 1～20 |
| pH | 1.2～1.8 | 2.8～3.5 | 3.5～5.5 |
| T/℃ | 15～70 | 15～70 | 15～70 |
| Dk/A·dm 2 | 2～8 | 4～10 | 2～10 |
(3) preparation technology parameter and condition:
The electroplating technique flow process is: piece surface polishing → oil removing → washing → pickling → washing → periodic reverse activation → periodic reverse plating → transition plating → pulse direct current plating → washing → neutralization → washing → drying.
Adopt the periodic reverse method to improve coating and high base strength in the electroplating technology, activate positive and negative turnaround time ratio and be: 2～4: 5, be 3～5min; Plating positive and negative turnaround time of ratio is: 4～6: 5, and be 5～10min.
Adopt high frequency tributary pulse power method to reduce the coating internal stress and keep the deposition of particulate material homogeneity, the frequency of pulse direct current plating is 2～20kHz.
Adopt suitable mechanical stirring to improve particle suspension characteristic in the plating bath, the galvanic anode plate adopts iron anode.Adopt the strict control of heating constant-temperature equipment temperature of electroplating solution span of control, to guarantee quality of coating.
The beneficial effect that the utility model reached is:
(1) the prepared wear resistance with frictional wear selfreparing characteristic part increases considerably, and the overlay coating wear rate reduces more than 15% than matrix, and part increases considerably work-ing life.
(2) the prepared surface hardness that has after frictional wear selfreparing characteristic part rubs can reach HV4500～6500.
(3) friction back piece surface coating roughness can be less than Ra0.1.
(4) the friction pair frictional coefficient (under the DRY SLIDING) of friction back part composition can be less than 0.01.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Fig. 1 is the electroplating system layout diagram of selfreparing composite deposite of the present utility model.
Among the figure, 1. high frequency DC pulse electroplating power supply, 2. voltmeter, 3. reometer, 4. mechanical stirrer, 5. agitator speed controlling box, 6. plating tank, 7. anode (iron anode), 8. negative electrode (workpiece), 9. heating tube, 10. heating constant-temperature equipment.
Embodiment
A kind of abrasion self-repairing plating coat on surface of metal preparation facilities is made of high frequency DC pulse electroplating power supply 1, voltmeter 2, reometer 3, mechanical stirrer 4, agitator speed controlling box 5, plating tank 6, anode 7, negative electrode 8, heating tube 9 and heating constant-temperature equipment 10.High frequency DC pulse electroplating power supply 1 parameter be 120～30V, 20kHz, can periodic reverse; The positive pole of high frequency DC pulse electroplating power supply 1 is connected with anode 7 through reometer 3, the negative pole of high frequency DC pulse electroplating power supply 1 is connected with negative electrode 8, be connected with voltmeter 2 between the positive and negative electrode of high frequency DC pulse electroplating power supply 1, mechanical stirrer 4 is connected with agitator speed controlling box 5, anode 7, negative electrode 8 and mechanical stirrer 4 place in the plating tank 6, and the heating tube 9 in the plating tank 6 is connected with heating constant-temperature equipment 10.
A kind of abrasion self-repairing plating coat on surface of metal preparation method,
(1) the little mineral powder material of preparation: adopt mechanical ball milling to pulverize the little mineral grain of preparation in the utility model, prepared mineral grain diameter dimension scope is at 0.01～10 μ m, and alkaline purification, acid treatment and tensio-active agent treatment process are adopted in the surface.
(2) preparation composite plating solution: the ternary alloy that according to the requirement of different piece surfaces to the electrolytic coating body material, the utility model development is tapped a blast furnace, iron-phosphorus alloy, iron nickel alloy, iron-manganese alloy, fe-cr alloy and above element constitute and the composite plating solution of little mineral grain formation.Wherein three kinds of iron-hydroxyl magnesium silicate plating bath representative formulas and processing parameter are as follows:
Table 1 iron-hydroxyl magnesium silicate plating bath representative formula
| Composition and parameter | Prescription 1 | Prescription 2 | Prescription 3 |
| Iron(ic) chloride g/L | 400 | 40 | |
| Ferrous sulfate g/L | 240 | 250 |
| Calcium chloride g/L | 300 | ||
| Ammonium chloride g/L | 20 | ||
| Little mineral grain g/L | 1～20 | 1～20 | 1～20 |
| pH | 1.2～1.8 | 2.8～3.5 | 3.5～5.5 |
| T/℃ | 15～70 | 15～70 | 15～70 |
| Dk/A·dm -2 | 2～8 | 4～10 | 2～10 |
(3) preparation technology parameter and condition:
The electroplating technique flow process is: piece surface polishing → oil removing → washing → pickling → washing → periodic reverse activation → periodic reverse plating → transition plating → pulse direct current plating → washing → neutralization → washing → drying.
Adopt the periodic reverse method to improve coating and high base strength in the electroplating technology, activate positive and negative turnaround time ratio and be: 4: 5; Plating positive and negative turnaround time of ratio is: 6: 5.
Adopt high frequency tributary pulse power method to reduce the coating internal stress and keep the deposition of particulate material homogeneity, the frequency of pulse direct current plating is 10kHz.
Adopt suitable mechanical stirring to improve particle suspension characteristic in the plating bath, the galvanic anode plate adopts iron anode.Adopt the strict control of heating constant-temperature equipment temperature of electroplating solution span of control, to guarantee quality of coating.
Claims (1)
1. abrasion self-repairing plating coat on surface of metal preparation facilities, it is characterized in that, constitute by high frequency DC pulse electroplating power supply (1), voltmeter (2), reometer (3), mechanical stirrer (4), agitator speed controlling box (5), plating tank (6), anode (7), negative electrode (8), heating tube (9) and heating constant-temperature equipment (10); High frequency DC pulse electroplating power supply (1) parameter be 120～30V, 20kHz, can periodic reverse; The positive pole of high frequency DC pulse electroplating power supply (1) is connected with anode (7) through reometer (3), anode (7) is an iron anode, the negative pole of high frequency DC pulse electroplating power supply (1) is connected with negative electrode (8), negative electrode (8) is a workpiece, be connected with voltmeter (2) between the positive and negative electrode of high frequency DC pulse electroplating power supply (1), mechanical stirrer (4) is connected with agitator speed controlling box (5), anode (7), negative electrode (8) and mechanical stirrer (4) place in the plating tank (6), and the heating tube (9) in the plating tank (6) is connected with heating constant-temperature equipment (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200129751U CN201046996Y (en) | 2007-06-25 | 2007-06-25 | Apparatus for preparing metal surface abrasion self-repairing coating |
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|---|---|---|---|
| CNU2007200129751U CN201046996Y (en) | 2007-06-25 | 2007-06-25 | Apparatus for preparing metal surface abrasion self-repairing coating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092733B (en) * | 2007-06-25 | 2010-05-19 | 大连海事大学 | Method and equipment for preparing abrasion self-repairing plating coat on surface of metal |
| CN106995932A (en) * | 2017-04-13 | 2017-08-01 | 大连海事大学 | The preparation method of aluminum alloy surface selfreparing differential arc oxidation composite ceramics film layer |
| CN111349955A (en) * | 2020-03-18 | 2020-06-30 | 燕山大学 | Method for repairing fatigue crack of drill rod |
-
2007
- 2007-06-25 CN CNU2007200129751U patent/CN201046996Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092733B (en) * | 2007-06-25 | 2010-05-19 | 大连海事大学 | Method and equipment for preparing abrasion self-repairing plating coat on surface of metal |
| CN106995932A (en) * | 2017-04-13 | 2017-08-01 | 大连海事大学 | The preparation method of aluminum alloy surface selfreparing differential arc oxidation composite ceramics film layer |
| CN111349955A (en) * | 2020-03-18 | 2020-06-30 | 燕山大学 | Method for repairing fatigue crack of drill rod |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20100625 |