Processing of parts with metal coating sections of different shape

FIELD: process engineering.

SUBSTANCE: invention relates for surface processing to get glossy and dull sections. In compliance with this process, surface pre-coated with first copper ply and second ply including bottom nickel ply and top chromium ply is subjected to selective removal of chromium ply on sections to be frosted. Selective removal is performed by laser displaced above the surface. Note here that laser exposure and power are adjusted to get various texture. Then, ply of noncorrosive metal containing zirconium and chromium is evaporated from vapour phase on said surface.

EFFECT: production of glossy and frosted surface sections.

5 cl


The technical field to which the invention relates

The present invention relates to the field of coatings. In particular, it relates to a method for machining, which allows you to combine different gloss and Matt coatings on the same details.

The level of technology

Electrolytic chromium coatings are now used as decorative and protective layer against corrosion. These coatings are usually applied in electrolytic baths.

In these conventional tubs plastic is not a conductor, so it requires the complicated process of pre-processing to provide the ability to coat.

Currently developing new methods for the deposition of chromium coatings by physical vapour deposition (PVD), which allow you to use less toxic products. Technology PVD begins directly with applied solid material, followed by its conversion into steam by heating or irradiation with high-energy ions. The vapor condenses on the surface of the substrate, forming a thin layer. The method is performed in a vacuum or in a controlled atmosphere to prevent interaction between metal vapor with air. The method of coating by this method is described in the application ES 2239907 A1.

D�I create a chrome plating on plastic or on metal surfaces are first precipitated copper on the surface of the product. The thickness of this layer is about 20-25 microns. This is followed by deposition of Nickel with a thickness of about 15 microns and finally put chromium of a thickness of typically about 0.5 micron. In the case where it is assumed a matte finish, the last layer of Nickel must be Matt prior to the application of chromium. However, if items must be matte and shiny areas, the area or areas with the appearance that is different from most of the details should be included independently, creating additional complexity. Currently opaque areas can be obtained by partial deposition of organic layers on the chrome shiny surface. This solution has the problem of defining the boundaries of different coatings and durability required for outdoor use in automobiles, such as adhesion, scratch resistance, etc.

Disclosure of the invention

The purpose of the invention is to solve the technical problems mentioned in the previous section. For this purpose a method for processing parts to create on the surface of various glossy and shiny coating. The method includes performing a selective etching of the second layer on the surface previously covered with the first layer of copper and a second metal layer, and selective etching is carried out respectively on the section or sections which are to be matting unlike other�of the details.

Selective etching may be performed using the laser, which passes over a given area or areas of the surface of the coating. The laser is preferably a laser yttrium aluminum garnet (Yag) with a wavelength of 1064 nm and power of 100 watts. The second metal layer may be Nickel or Nickel and chromium as the top layer. In the first case is carried out the etching of the layer of Nickel, whereas in the second case, conduct etching of the chrome layer. After selective etching is applied another layer of non-corrosive metal (again chrome, steel or metals such as Zr, Au, Pt, Ru, In, etc.). These metals can be deposited on the details of PVD or by any other suitable means. Chromium can also be deposited by electrolysis before the etching, and at the final stage.

The implementation of the invention

The method of the invention is used on parts made of plastic material and metal, for example, those which are deposited on the layer of copper and Nickel as a preparation to the plating process. In the first implementation of the partial etching of the surface is performed on the Nickel layer, which allows to obtain adjacent parcels with different texture/sheen. Then detail chromium, for example, electrolytic plating.

In another implementation is carried out the etching of the surface layer of chromium on the details with layers of copper, Nickel� and chromium.

Selective etching is performed by laser, creating texture or Shine (gloss), which differs from previously protected surfaces.

If the etching is a chemical or scratching, areas that should not be processed and will be shiny, protect protective coating or masking coating, then the protection is removed.

Finally, a layer of non-corrosive metal may be deposited using PVD (sputtering, arc deposition, etc.), the conservation of the various levels of the received gloss or texture is provided as described above. The metals used in this last phase, are chromium, titanium, zirconium, indium, ruthenium, or noble metals such as gold or platinum. Different metals give details on coating various colors, glossy look of the plots previously treated with selective etching, detail is retained and protected from aggressive external influences. The final coating non-shiny areas may have different roughness or geometric shape, the use of a laser is preferred in this particular example. For striped coatings preferably, the etching scratching.

Chromium is deposited as the intermediate stage and the last stage may be electrolytic chamomile chrome applied PVD.

This way is achieved that the same parts have areas with different coatings without the need to enter the removable elements on different parts of the main body part or use a partially applied on the metal of the organic layers, and facilitates obtaining a homogeneous and stable in external and internal conditions of the surface of the component, for example, required in the automotive industry. So on the surface there are areas with different gloss depending on time of etching and the method used (from gloss to Mat, including gloss and all intermediate grades, the difference in thickness which can not be observed by the human eye without optical devices.

Under selective etching means that intended for the treatment plots pre-selected and modified to partially change the texture and Shine of a previously deposited layer of Nickel or chromium. This gives the selected surface appearance different from main shiny surface.

Selective laser etching is performed, for example, Yag-laser with a wavelength of 1064 nm and power of 100 watts.

You can make application with other types of laser with similar characteristics.

Various coatings can be obtained by varying the power and time dei�the third laser which gives different nuances and details, from closest to the mirror tone (shiny area) to a more or less matte coating or coating with a certain texture.

1. Method of treatment of parts for creating a surface with shiny and matte areas, which on the surface, previously coated with a first layer of copper and a second layer comprising a lower layer of Nickel and another top layer of chromium, perform selective removal of the second layer, and the selective removal of the second layer is carried out at the site or sites subject to matting, unlike the rest of the parts by means of laser yttrium aluminum garnet with a wavelength of 1064 nm and power of 100 W, which moves over the surface, matarua the desired area or areas, characterized by the fact that what is the duration and the laser power adjust to get different textures, and selective removal is performed on the chromium layer, and after performing the selective removal of the surface by physical vapor deposition (PVD) is applied another layer of non-corrosive metal containing Zr and Cr.

2. A method according to claim 1, wherein the selective removal of the chrome layer is performed until reaching the underlying layer of Nickel.

3. A method according to claim 1, wherein chromium is deposited by electrolysis.

4. A method according to any one of claims. 1-3, in which the part of fullment�and of plastic material.

5. A method according to any one of claims. 1-3, in which the part is made of metal.


Same patents:

FIELD: electricity.

SUBSTANCE: method to apply a composite coating includes application of a composite electrochemical layer on the basis of iron with a strengthening disperse phase, representing the following compounds interacting with iron when heated: B4C or SiC, or VC, or WC, subsequent heating using high-frequency current or laser with melting of the applied composite electrochemical layer and cooling to produce a coating containing strengthening phase compounds produced when reacting with iron: FeB or FeSi, or FeV, or FeW.

EFFECT: coating is produced, which makes it possible to increase resistance of items to cyclic loads due to generation of wear-resistant layers with compression stresses on their surface.

9 dwg

FIELD: metallurgy.

SUBSTANCE: steel plate with coating from zinc or zinc alloy with a layer of thin film of primary corrosion-protection coating, which is applied to it, has arithmetic mean roughness Ra of surface of zinc coating layer, which is determined in compliance with JIS B 0601, which is obtained by means of measuring instrument of surface roughness with a tip according to JIS B 0651, which is equal to 0.3-2 mcm, and maximum height of peak Rp of 4.0-20.0 mcm, where mean arithmetic roughness Ra is peak and obtained by measurement of 80% or more of Rp at the interval of length of evaluation of peak parts, which is equal to 20 mcm, by means of 3D-analyser of roughness with electronic beam is 70 % or more of mean arithmetic roughness Ra of average, which is obtained by measurement at the interval of evaluation length of parts, which is equal to 20 mcm with height of ± 20 % relative to middle line obtained by means of analyser of surface roughness with a tip by means of 3D-analyser of roughness with electronic beam.

EFFECT: plate has good electric conductivity of surface, provides grounding ability and electromagnetic protection of components of steel plate after assembly of the above equipment, as well as it is corrosion-resistant.

6 cl, 6 dwg, 3 tbl

FIELD: metallurgy.

SUBSTANCE: method includes electric deposition of cobalt-tungsten coatings with application of a pulse current with density of 10 A/dm2 from a mixed electrolyte having temperature of 55-65°C and the following composition, g/l: cobalt sulfate 12-15, sodium tungstate 40-100, ammonium citrate 40-60, tungsten carbide 10-50, pH 4-8. The produced coating is lubricated with a 10% solution of potassium hexacyanoferrate (II) in glycerine and processed by electric spark method with a graphite electrode EG-4 at the soft mode by working current of 1.2-1.5 A.

EFFECT: higher hardness and wear resistance of a coating.

3 ex

FIELD: chemistry.

SUBSTANCE: method of making assembled components involves assembly thereof and soldering in a vacuum chamber, as well as applying a coating, for example, through contact silver plating, which is carried out after chemical degreasing, insulation of places which are not to be coated, chemical etching, further etching in a mixture of hydrofluoric acid and sulphuric acid, activation in hydrochloric acid, preliminary and chemical nickel plating, as well as chemical copper plating.

EFFECT: disclosed engineering solution simplifies the technology of making sealed lead-ins, enables to obtain improved electrical characteristics of strongly bonded coating and reduce loss, standing wave ratio.

1 ex, 2 cl

FIELD: metallurgy.

SUBSTANCE: invention relates to galvanotechnics and can be sued in aerospace engineering and other industries to produce assembly units and parts operated at high temperatures, for example, liquid-propellant rocket engine turbo pump units. Method of producing protective coat from nickel or copper on the surface of high-alloy steels or nickel alloys comprises electrodeposited coating and thermo mechanical treatment in gasostatic plant at 400 to 1120°C and 101 to 149 MPa.

EFFECT: high-quality copper or nickel coats that feature high adhesion with basic material and mechanical properties on substrate.

1 tbl, 1 dwg

FIELD: metallurgy.

SUBSTANCE: invention relates to field of strengthening of restored surfaces of steel details. Method includes sulphocyaniding of electrodeposited coating iron - boron during 1 - 3 h at temperature 550 - 600 °C with usage of plaster of the following composition, wt %: iron pyrites 25, potassium ferrocyanide 55, chamotte 20.

EFFECT: increasing of microhardness and wear resistance of steel details.

FIELD: chemical industry; metal-working industry; other industries; methods of the corrosion protection of the steels by application of the zinc-chromate coatings.

SUBSTANCE: the invention is pertaining to the field of the corrosion protection of the metals and may be used for the protection of the steel articles against corrosion by means of the multilayer coatings. The zinc-chromate coating on the steel contains the zinc layer produced out of the sulfate electrolyte, and the external chromate layer. At that the coating in addition contains the inner electric current- conductive chromate layer produced out of the solution, (g/dm3): CrO3 - 8, HNO3 - 4, Na2SO4 - 12, Cr2(SO4)18H2O - 5, Na2SnO3H2O - 8. The zinc-chromate coating on the steel contains the zinc layer produced out of the sulfate electrolyte, and the outer chromate layer. At that the zinc-chromate coating additionally contains the inner electric current conductive chromate layer produced out of the solution, (g/dm3): CrO3 - 8, Na2SO4 - 12, Cr2(SO4)3 ·18 H2O - 5, In(NO3)3 - 6. The technical result of the invention is the raise of the protective capability of the zinc-chromate coating on the steel on the average in 2 times.

EFFECT: the invention ensures the increased protective capability of the zinc-chromate coating on the steel on the average in 2 times.

1 dwg, 4 ex

FIELD: electrochemical technologies.

SUBSTANCE: method includes dipping zinc-covered article in chromium-containing solution, prior to dipping electrolytic application of zinc is performed onto previously cleaned surface of zinc-covered article with following washing and drying, and after chromatizing article is dried by hot air.

EFFECT: protective cover, resistant to corrosion effect in atmosphere, polluted with industrial gases, and to effect from external loads of direct and alternating character, to provide for higher reliability and durability of article.

1 ex

FIELD: chemical and heat treatment of metals and alloys, possibly hardening surfaces of working organs of technological equipment for food production and consumers' containers for packaging food products.

SUBSTANCE: method comprises steps of applying coating and further laser working. Coating is applied by chrome deposition at cathode density of electric current 3.5 - 5.5 mA/mm2 for 60-90 min from aqueous electrolyte or by forming layer of iron borides at temperature 800-1000°C for 150-180 min from melt salt. Laser treatment is performed in mode of pulse irradiation at specific power 2.4 - 2.6 kWt/mm2 and at scanning rate 1.75 - 2.25 mm/s.

EFFECT: improved micro-hardness and adhesion strength due to formation of diffusion zone of solid solution iron-chrome or zone of iron borides on parts of manufacturing equipment for rubbing action in food making or grain processing industry branch.

1 tbl, 3 ex

FIELD: metallurgy.

SUBSTANCE: invention concerns method and facility of surface treatment of metallic strip and can be used in metallurgical production. Treatment of metallic strip is implemented by electroarc discharges at guiding shunt rollers, allowing electromagnetic system of travelling magnetic field, by means of which it is managed movement of cathode spots by surface of metallic strip. For removing of adverse influence of own magnetic fields at shunting from cathode spots, shunt is implemented directly under cathode spot from backside of metallic strip in the area of metallic strip contact with shunting roller. In the area of contact it is implemented blast cooling of metallic strip by shunting roller, outfitted by cooling system.

EFFECT: cost saving, increase in productivity and reduction of undesirable metal heating.

4 cl, 1 dwg

FIELD: process engineering.

SUBSTANCE: set of inventions relates to production of article with decorative patter applied on its surface, primarily, on sheets and rolls. In compliance with first version, process line comprises sequential shaped-surface long article feeder, surface being composed of ledges and recesses, device to apply a substance of said surface and excess substance remover displace timed with processed article. Note here that a support is arranged under said remover. In compliance with second versions, process line comprises device for intermittent feed of long article with shaped surface arranged sequentially. Said surface is composed of ledges and recesses. Besides, it comprises device to apply a substance of said surface and excess substance remover displace timed with processed article. Also, it includes device for intermittent reception of long article with made decorative coating on shaped surface. Note here that a fixed support is arranged under said remover. Said remover can reciprocate. Note here that process line includes the means that inhibits the displacement of long article.

EFFECT: application of decorative coating on long article surface of finishing or facing materials.

38 cl, 1 dwg

FIELD: printing industry.

SUBSTANCE: device of image application on the coloured outer surface of a motor vehicle consists of a mask adjusted to the outer transparent layer of the outer surface of the motor vehicle with the subsequent removal, the mask comprises a masked segment and an open segment, which together define the image applied to the surface; the abrasive that can remove the segment of the outer transparent layer to form an image with a matte finishing part and unscarfed part, and one or more materials that can be used to create the outer transparent layer on the matte finishing part of the image, looking glossy, which is not different from the glossy appearance of the transparent layer of unscarfed part of the image.

EFFECT: creation of the method and device for applying images on the coloured outer surface of the motor vehicle, which look glossy on the matte part of the image and do not differ from the glossy appearance of the transparent appearance of unprotected area of the image.

19 cl, 10 ex, 9 dwg

FIELD: process engineering.

SUBSTANCE: set of inventions relates to etching machines and etching devices intended for decorative finishing of articles from various materials by accurate image transfer from original onto workpiece surface. Etching machine comprises frame, carriage coupled therewith to displace above workpiece surface and supporting etching device with vibrodrive to impart impact oscillations to etching tool, etching tool motor drive of rotation and tool vertical displacement mechanism. Note here that motor drive of tool rotation is fixed at said carriage. Note also that etching tool is fitted in spindle. The latter is coupled with vibrodrive support to oscillate therewith. Said spindle is driven by motor, or by magnets operated without mechanical contact, or via flexible shaft.

EFFECT: higher quality of etching, decreased weight of oscillating components.

26 cl, 9 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to treatment of materials by plasma. Plasma device comprises first anodic plasma head and first cathodic plasma head. Every said plasma head comprises electrode, plasma passage and main gas inlet arranged between, at least, section of said electrode and said plasma passage. First anodic and second cathodic plasma heads are arranged at certain angle relative to each other. Plasma device comprises also second anodic and second cathodic plasma heads arranged at certain angle relative to each other. Angle between said first cathodic and anodic heads and second cathodic and anodic heads makes 50-90 degrees.

EFFECT: higher efficiency of treatment.

7 cl, 12 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming instrument making for production stamps application of letters on metals plastic in cold deformation, including gold, platinum, silver, palladium and their alloys. Proposed method consists in stamping marks with their recesses and ledges in work piece metal layer negative relative to artwork on article surface. For this, counterpunch with marks applied on its surface is used. To apply marks on counterpunch surface, punch with recessed and elevated marks identical to those on stamp is used and produced by computer-aided machine engraving. For production of stamp, punch and counterpunch billets made from cutting metals, plastic in cold deformation, are used. After relief images are made on their surface, they are subjected to tempering to hardness of cutting metal.

EFFECT: higher efficiency, simplified process.

3 cl, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to jewels production, particularly, to laser etching of images on articles from noble metals. In compliance with first version, article is polished to purity class of not over 9th and cleaned for the article to be fixed. Computer image is entered into laser radiator program unit and applied on article surface by laser beam tuned to point burning-through. Then, finished article is cleaned of carbon. In compliance with second version, prior to applying the image, surface of article is coated by rhodium.

EFFECT: improved quality, lower costs.

2 cl, 2 ex

FIELD: process engineering.

SUBSTANCE: invention relates to metal processing, namely, to producing decorative-artistic images on the surface of metal articles. Proposed method consists in processing metal article surface by abrasive material. Note here that decorative-artistic image is formed by superimposing partially processed areas.

EFFECT: simplified method of producing decorative image on metal article surface with volumetric effect and dynamic properties of image in motion or at change of light source position.

3 cl

FIELD: jewellery industry.

SUBSTANCE: invention is related to jewellery industry and method for making coloured image on items made of precious metals. Transparent film with coloured image is placed onto cleaned surface of item, then cold enamel mixed with catalyst is applied onto prepared surface of item with pattern in an even layer. According to the 2nd method, item surface is cleaned, finished down to ≥ 9th class of purity, engraved, then transparent film with coloured image is placed onto item surface, at the same time coloured pattern is matched with the one already engraved, on top surface of item is coated with even layer of cold enamel mixed with catalyst.

EFFECT: invention provides for production of coloured image on items made of precious metals.

2 cl, 2 ex

FIELD: jewelry.

SUBSTANCE: invention relates to methods of applying images on precious metal products by laser engraving. Method includes polishing product surface, itsrefinement, product fixation and further application of image on product by beam of laser irradiator, in whose program block computer image was preliminarily transferred. Surface polishing and refinement are performed until 9-class surface roughness is achieved. Before product fixation its surface is moistened with silicon-organic polyethylsiloxane liquid. Image is applied by point melting of surface with laser beam to 14-class roughness of product surface. Before image application product surface is covered with rhodium.

EFFECT: giving image contour three-dimensional effect.

2 cl, 1 dwg

FIELD: technological processes.

SUBSTANCE: invention is related to the field of automated engraving and method for creation of half-tone image in functional layer of item. Creation of image elements in functional layer of item per full depth is realised so that integral shape-generating motion of tool makes it possible to carry out treatment in mode of dynamic micro-cutting. Complete rated depth of every structural element of image is formed for the period of time between two serial control pulses coming from the fourth outlet of programmable controller, which is functionally a control channel of electromechanical converter. Shape-generating motion of tool is realised by means of two independent drives: electromechanical converter, core of which sends kinetic energy to tool in the mode of pulse impact load for realisation of reciprocal motion; and also pneumatic drive that provides for tool rotation with preset frequency, which is related to speed of tool reciprocal motion in certain manner.

EFFECT: invention makes it possible to improve contrast, to increase quality of formed image and also process efficiency.

5 cl, 15 dwg