463 results about "Chrome plating" patented technology

The invention discloses a preparation method for ensuring thickness uniformity and form and location tolerance of a coating of a slender shaft, the slender shaft is a slender stepped shaft-shaped part, the preparation method comprises base body processing before plating, hard chromium plating and machining after plating, in the base body processing process stage before plating, a center hole is adopted as a processing reference, finish machining is carried out according to the shape of the part, and the thickness uniformity and the form and location tolerance of the part are guaranteed. It is ensured that the form and position error and dimensional tolerance of the machined part meet the requirements; in the hard chromium plating stage, the non-chromium-plated part is protected, and the chromium-plated part is subjected to hard chromium plating; and in the post-plating machining stage, the center hole is adopted as a machining standard, post-plating rough machining is conducted firstly, then post-plating finish machining is conducted, grinding is conducted to meet the design requirement, and a plated workpiece is obtained. By the adoption of the preparation method, the problem of machining deformation of the slender shaft type structural part is thoroughly solved, the machining performance is stable, the production efficiency is high, special equipment and tools do not need to be configured, and the method is suitable for large-scale production and machining.

A method for indicating a sanitation status of a surface may comprise contacting a coating on a surface with a cleaning composition, wherein the coating comprises a chromic material and exhibits a baseline optical state under illumination with light having a first wavelength prior to contact with the cleaning composition and an altered optical state under illumination with light having a second wavelength after contact with the cleaning composition, the cleaning composition configured to induce a switch from the baseline optical state to the altered optical state; and illuminating the coating with the first wavelength of light, the second wavelength of light, or both, to reveal a sanitation status of the surface. Systems for indicating a sanitation status of a surface are also provided.

The utility model discloses automatic metal chromium plating equipment which comprises a chromium plating box shell, a first sliding groove which is vertically distributed is formed in the inner wall of the chromium plating box shell, a first sliding block is connected to the inner wall of the first sliding groove in a sliding mode, and a supporting plate for supporting a metal part is fixed to the outer wall of the first sliding block. A driving mechanism used for driving the supporting plate to move up and down in a reciprocating mode is arranged in the chromium plating box shell, and a liquid outlet is formed in the front end of the chromium plating box shell. According to the automatic metal chromium plating equipment, the supporting plate, the first hole, the second hole, the first sliding block, the first sliding groove and the driving mechanism are combined for use, a metal part is placed on the supporting plate, and it is ensured that a chromium plating solution can make full contact with the metal part through the two holes; and under the action of the driving mechanism, the metal part can be immersed in the chromium plating solution, the comprehensive electroplating effect is achieved, time and labor are saved in operation in the mode, and the comprehensiveness of chromium plating of the metal part can be improved.

The utility model discloses an anti-aging automobile wheel cover which comprises a wheel cover body, a lining is fixedly installed on the inner wall of the wheel cover body, chromium plating layers are arranged on the surfaces of the lining and the wheel cover body, the lining comprises a lining plate, a positioning piece is fixedly installed on the outer side of the lining plate, a positioning groove is formed in the inner wall of the wheel cover body, and the inner wall of the wheel cover body is provided with an anti-aging layer. The positioning grooves are matched with the positioning pieces in size, and meanwhile the positioning pieces are inserted into the positioning grooves. According to the anti-aging automobile wheel cover, when soil covering the surface of the inner wall of the wheel cover body needs to be cleaned, at the moment, screws between the wheel cover body and the lining are detached, and the lining is independently taken out for cleaning work; the interior of the wheel cover body and the lining are uniformly screwed and fixed through four groups of fixing bolts; when an automobile runs in a bumpy mode at a high speed, the lining and the wheel cover body cannot be separated, and accidents of potential safety hazards caused by the fact that the lining falls off when the automobile runs are eradicated.

A method and system for recovering low carbon ferrochrome from feed materials including chromite ore and aluminum granules in a chamber of an arc furnace using an aluminothermic smelting process carried out in the presence of an inert gas, e.g., Argon. The aluminothermic smelting process produces a bath of molten low carbon ferrochrome metal with molten slag floating thereon in the chamber. The molten low carbon ferrochrome metal and molten slag are extracted individually and processed to provide a solidified low carbon ferrochrome metal product and a solidified slag particles product, respectively. A method for the recirculation, recovery and reuse of the inert gas, and a system for accomplishing the recirculation, recovery and reuse of the inert gas.

The invention is applicable to the technical field of trailer part treatment, and provides a trailer part surface coating treatment process which comprises the following steps: performing high-frequency induction quenching on a trailer ball base body; a copper bottom layer is electroplated on the trailer ball base body, and a bright nickel layer is electroplated on the copper layer; a microcrack nickel layer is electroplated on the bright nickel layer, and a trivalent chromium layer is electroplated on the microcrack nickel layer through a trivalent chromium plating solution; the trailer ball base body electroplated with the trivalent chromium layer is subjected to nanometer hole sealing treatment; applying a layer of polysiloxane or UV (ultraviolet) curing type super-hard transparent finish paint on the surface subjected to hole sealing treatment in a spraying manner; a layer of micro-crack nickel is electroplated on the bright nickel layer, and a micro-crack network of the micro-crack nickel provides a preset and uniform stress release channel for a subsequent chromium layer, so that the internal stress of the chromium layer is dispersed, the brittleness of the chromium layer is greatly reduced, and the impact resistance of the chromium layer is remarkably improved; and a trivalent chromium chromium plating process is adopted to replace traditional hexavalent chromium chromium plating, so that the environmental pollution and toxicity are greatly reduced, and the requirements of modern environmental protection regulations are better met.

The invention discloses an automobile interior trim part chromium plating electroplating liquid impurity removing device and a using method thereof. The automobile interior trim part chromium plating electroplating liquid impurity removing device comprises a shell, a filtering unit and a cooling unit. The cooling unit comprises a cooling disc, a condensation pipe, an injection pipe, a rotating part and an annular magnetic driver; the cooling disc is horizontally arranged above the filtering unit; the condensation pipe is arranged at the lower part of the cooling disc and is used for cooling the cooling disc; the injection pipe is arranged above the cooling disc in the axis direction of the cooling disc, and the diameter of the cooling disc is larger than that of the injection pipe; the rotating part is rotationally arranged on the cooling disc along the axis of the cooling disc, the rotating part is of a radial structure, the rotating part is composed of a plurality of rotating plates, and the rotating plates are evenly distributed around the axis of the cooling disc; the annular magnetic driver is used for driving the rotating part to rotate. According to the device, the cooling work of the electroplating liquid can be completed before filtering, meanwhile, the cooling unit can be prevented from being blocked by impurities, and the quality of the electroplating liquid discharged back to the oxidation tank is guaranteed.

The invention discloses a purification method of high-purity chromium for a target material, and belongs to the technical field of metal chromium purification, the purification method comprises the following steps: placing an original electroplated chromium sheet in a vacuum reduction furnace, vacuumizing the vacuum reduction furnace to 10Pa, filling 0-1atm of hydrogen, heating the vacuum furnace from room temperature to final temperature T DEG C according to a six-stage heating curve, keeping the temperature for 12-24 hours, and cooling to room temperature to obtain the high-purity chromium for the target material. And heating is stopped, hydrogen continues to be introduced into the vacuum reduction furnace, after the temperature in the vacuum reduction furnace is reduced to the room temperature, discharging is conducted, and the high-purity chromium is obtained. According to the purification method of the high-purity chromium for the target material, the high-purity chromium is prepared through purification of an original electroplated chromium sheet, the content of O in the chromium prepared through the purification method is smaller than or equal to 60 ppm, the content of N is smaller than or equal to 60 ppm, the content of C is smaller than or equal to 50 ppm, the content of S, Fe, Al and Si is smaller than or equal to 40 ppm, and the prepared high-purity chromium can be applied to the field of target materials.

The invention provides a device and a method for electroplating chromium on a cylindrical part, one end of a hook in the device is connected with a cathode conductive hoop, and the arc size of the cathode conductive hoop is matched with the size of a workpiece; the positioning block is connected with the hook and used for fixing the upper end of a workpiece, the size of the positioning block is matched with the inner diameter of the workpiece, and the cathode conductive hoop and the positioning block jointly fix the workpiece and enable the workpiece to be kept perpendicular; the positioning ring sleeves the upper end of the workpiece, and the arc size is matched with the outer diameter of the workpiece; one end of the connecting rod is fixed on the positioning ring, the other end is connected with the anode ring, and the height position of the anode ring is matched with a workpiece plating part; one end of the conductive wire is connected with the pull rod, and the other end of the conductive wire is connected with the conductive clamp; and the hook is connected with a cathode of an external tank body. According to the invention, the uniform thickness of the coating of the workpiece can be ensured, the electroplating time is shortened, and the grinding operation is cancelled.

The invention belongs to the technical field of valve sealing element coating and plating processes, and discloses a special valve hard sealing element dissimilar material coating and plating process which comprises the following steps: S1, surface pretreatment; s2, coating of a bottom layer coating; s3, coating of an intermediate coating; s4, coating of a top layer coating; s5, quality detection and control; the surface pretreatment comprises cleaning, mechanical treatment, acid pickling and passivation, the coating of the bottom coating comprises nickel plating treatment and chromium plating treatment, the coating of the middle coating comprises ceramic coating and coating curing, and the coating of the top coating comprises tungsten carbide coating and coating heat treatment. The quality detection and control comprises coating thickness testing, adhesive force testing, corrosion resistance testing and wear resistance testing. According to the method, a compact and hard ceramic coating is formed through curing treatment, so that the high temperature resistance of the sealing element is improved, and the wear resistance and corrosion resistance of the sealing element are further enhanced.

The invention belongs to the technical field of automobile die-casting dies, and discloses an automobile part die-casting die surface high-wear-resistance and corrosion-resistance treatment process which comprises the steps that a die is cleaned; polishing the surface; mold defects are recognized, and corresponding repairing measures are taken according to different defects; carrying out nitriding treatment on the cleaned and polished die subjected to defect repair; the mold is subjected to gas nitriding treatment, and then key parts and components are subjected to ion nitriding treatment; hard chromium plating treatment; chemical hole sealing and organic coating hole sealing treatment: multi-point detection is carried out, and it is ensured that the hardness of the nitriding layer and the hardness of the chromium plating layer meet the requirement. According to the method, fine defects of the mold can be found, and the wear resistance and corrosion resistance are improved through combination of gas nitriding treatment and key part ion nitriding treatment; through hard chromium plating treatment, surface performance strengthening, double hole sealing treatment, protection effect strengthening and adoption of the nano-powder addition amount and a pulsed electric field directional arrangement method, a plating layer is more uniform and compact, and the hardness and wear resistance of the plating layer are improved.

According to the method for locally plating the chromium on the metal surface of the part, the metal surface of the part comprises a surface B needing to be plated with the chromium and a surface A which is adjacent to the surface B and does not need to be plated with the chromium, and a groove is formed between the surface B and the surface A to separate the surface B and the surface A; before electroplating, a non-ferrous metal sheet is tightly bonded to the A face through insulation paste so that the A face can be shielded by the non-ferrous metal sheet, and insulation protection is conducted on the other non-plated faces needing to be protected through insulation protection materials; and the surface B is soaked in electroplating liquid, and electroplating treatment is conducted after electrification. According to the method, non-plating surface protection is achieved, the current density distribution condition of the chromium plating surface is improved, the obtained chromium plating surface is smooth and fine, and the edge is free of the wavy defect; compared with a traditional insulating material, the tool clamp is low in cost, easy and convenient to operate and high in manufacturing qualification rate.

The invention discloses a weaving machine metal part with a low-friction coating and a manufacturing method of the weaving machine metal part, and belongs to the technical field of textile machinery. A body is subjected to heat treatment, magnetic flow grinding, alkaline degreasing, acid activation, ultrasonic cleaning and plasma activation, then a chromium electroplating transition layer or a chemical plating Ni-P transition layer is applied, suspension liquid spraying or powder spraying or dipping is used, sintering curing is cooperated, a PTFE self-lubricating layer is applied, and the self-lubricating composite material is obtained. And finally, the compact Ni / Cr-PTFE-based composite coating is formed on the metal part of the weaving machine. The PTFE self-lubricating layer provides an extremely low friction coefficient, and yarn abrasion and part temperature rise are remarkably reduced; and the Ni / Cr transition layer greatly enhances the bonding strength of the PTFE layer and the steel substrate, and effectively prevents stripping and micro-cracking of the coating in high-speed weaving, so that effective protection of high-performance fibers is synchronously realized, and the service life of parts is remarkably prolonged.

The present invention relates to a low-emissivity film for buildings and vehicles that is capable of having excellent visibility and thermal insulation performance. The low-emissivity film for buildings and vehicles comprises: a transparent substrate layer; and an infrared cut-off layer formed on top of the transparent substrate layer by means of sputtering and having a metal layer comprising any one or more metals selected from the group consisting of nickel, chrome, and silver, wherein the low-emissivity film has thermal transmittance of 4.6 W / m2K or less.

The invention relates to an intelligent roller grinding method for producing high-surface-grade strip steel. The intelligent roller grinding method comprises the steps that S1, the surface of a roller is plated with chromium; s2, a model approximator of the relation between the roller surface roughness and the grinding process state parameters is established; wherein the grinding process state parameters comprise the roller speed, the grinding depth and the grinding wheel speed; and intelligent roughness identification is achieved by optimizing state parameters in the grinding process. According to the method, the surface roughness of the roller is predicted online by establishing the roughness and grinding process state parameters, so that high-quality and high-efficiency production of cold-rolled high-grade surface products is supported, and it is guaranteed that a unit operates stably and the product quality meets the requirement.

The invention belongs to the technical field of metal surface treatment, and discloses an electroplating additive suitable for a steel and alloy surface bright wear-resistant corrosion-resistant hexavalent chromium coating, which is characterized by comprising an organic compound, an inorganic acid, a metal inorganic compound and water, the organic compound comprises a mixture of a fluorine-free compound and a fluorine-containing compound. The method can be widely applied to decorative chromium plating and functional hard chromium plating, the electroplating temperature is 40-70 DEG C, the electroplating time of the decorative chromium plating is 1-10 min, the electroplating time of the hard chromium plating is 20 min or above, the hardness can reach 900 HV or above, the glossiness of the surface of a workpiece can be kept through the decorative plating and the hard chromium plating, the current efficiency can reach about 23%, and the service life of the workpiece is prolonged. The current use requirements of high efficiency, stability and environmental protection are met, and the market prospect is good.

The utility model discloses a metal chrome-plated surface drying device, which relates to the technical field of metal chrome-plated surface drying, and comprises a box body, a controller is fixedly installed on the right end of the box body, a box door is movably hinged on the front of the box body, a transparent observation window is fixedly installed in the middle of the box door, a drying component is installed on the top of the box body, brackets are symmetrically fixedly installed on both sides of the lower end of the box body, a motor 1 is fixedly installed in the middle of the lower end of the box body, the output end of the motor 1 is transmission-connected with a rotating shaft, and an adjustment mechanism is installed on the top of the rotating shaft. The utility model can generate heat by using the cooperation of a fixed frame, a mounting frame, an electric heating tube, a support plate, a second motor, a fan blade, and a dustproof net after the electric heating tube is energized, and the rotating fan blade can blow air to the electric heating tube to generate hot air, and the hot air can be used to dry the metal parts in the box body, thereby improving the practicality of the device.

The present invention relates to a structure and a method for chrome plating plastic pieces, for reducing the difference in the thickness of the metal in all areas of the piece to be chrome plated. This is achieved using a specially designed support means that allows the excess metal in chrome-plated plastic pieces to be reduced.

A cooktop according to one embodiment of the present disclosure may include a cooktop body, a ceramic glass disposed on the upper part of the cooktop body and having a through-hole formed in a part thereof, a bracket disposed on the through-hole, a glass member coupled to the bracket so as to be disposed within the through-hole, and a display device disposed on the lower side of the glass member. The bracket may include a metal member and a chrome coating layer coated on the metal member.

The invention relates to the technical field of plasma injection, and discloses a plasma beam injection system in a chromium plating machine, which comprises an electroplating bin, a bin door matched with the electroplating bin is arranged on one side of the surface of the electroplating bin, and a workpiece clamping mechanism is arranged in the electroplating bin and is used for clamping and fixing a workpiece and driving the workpiece to rotate while revolving. Plasma beam emitting mechanisms are arranged on the two sides of the inner wall of the electroplating bin and used for emitting plasma beams. According to the plasma spraying device, the plasma beam can cover the surface of the workpiece without dead angles, the problems of spraying leakage and stacked spraying caused by single movement are effectively avoided, a bidirectional spraying pattern can be formed, the coating uniformity and the coating bonding strength are improved, and therefore the spraying requirement of the workpiece can be better met.

This invention belongs to the field of nuclear power control rod processing technology, specifically relating to a chromium plating method and a continuous-pass chromium plating apparatus for ultra-long, ultra-fine, thin-walled cladding tubes used in nuclear power control rods. The chromium plating method includes pretreatment and chromium plating treatment. The pretreatment includes degreasing and cleaning the ultra-long, ultra-fine, thin-walled cladding tube. The chromium plating treatment is a continuous-pass chromium plating process, in which the pretreated cladding tube is continuously passed horizontally and at a uniform speed along its axial direction through at least one chromium plating tank. The cladding tube is supported by a support structure as it passes through each chromium plating tank, maintaining horizontal linear movement. Within each chromium plating tank, an annular anode surrounds the movement path of the cladding tube, and a pulsed power supply applies a cathode current to the cladding tube for pulse electroplating. This invention, by employing a uniform-speed continuous-pass chromium plating method and using an annular anode, ensures that the chromium plating time and current conditions are consistent along the entire axial length of the workpiece.

The application discloses a kind of automatic overturning type automobile interior chrome plating equipment and process, wherein, the chrome plating equipment includes chrome plating box, overturning mechanism and support structure;Overturning mechanism includes overturning frame, and both ends of overturning frame are provided with shaft;Support structure includes two support assemblies and two separation structures, two support assemblies are respectively arranged at the two sides of overturning frame, support assembly includes mounting bracket, support net, multiple magnetic attraction components and limiting rod, support net is arranged on mounting bracket, multiple magnetic attraction components are arranged on support net, limiting rod has multiple, limiting rod uses metal material that can be adsorbed on support net by magnetic attraction component, separation structure is connected with the mounting bracket in two support assemblies, and separation structure is used to control the distance between two mounting brackets.The application sets overturning mechanism, support assembly and separation structure, so as to ensure that the automobile interior after overturning can be fully contacted with electroplating liquid, and the chrome plating effect is guaranteed.

The utility model discloses a car lamp chrome-plated decoration strip injection mold, which comprises a base, an upper mold and a lower mold assembly, the lower mold assembly comprises two lower mold bodies, and the two lower mold bodies are fixedly connected through a connecting block, and the utility model relates to the technical field of injection molds. According to the injection mold for the chromium-plated decoration strip of the car lamp, through mutual cooperation of a stabilizing rod, a transverse plate, a first inclined block, an ejector rod, a first spring, a vertical rod, a telescopic rod, a second inclined block and a second spring, after injection molding is completed, the upper mold body and the lower mold body are demolded, and in the moving process of the lower mold body, the telescopic rod is extruded, so that the lower mold body is demolded; the ejector rod in one lower mold body can make upward contact with the decoration strip subjected to injection molding and eject the decoration strip subjected to injection molding out, when the other lower mold body is subjected to injection molding, the automobile lamp chromium-plated decoration strip subjected to injection molding of one lower mold body can be taken out, time and labor cost are saved, the production process is smoother, and the overall production efficiency is improved.

The utility model provides a liquid expansion mandrel fixing device for processing a hard chromium plated ball, which belongs to the technical field of hard chromium plated ball processing, and comprises a mandrel main body, and the inner part of the mandrel main body is divided into cavities and is used for realizing uniform expansion; a filling hole is formed in one side of the core shaft main body and is used for filling a hydraulic medium into the core shaft main body; a sealing screw is arranged at an opening of the filling hole; an expansion chamber and a compression chamber are arranged in an inner cavity of the mandrel body, the compression chamber is arranged on one side of a center shaft of the mandrel body, and a linkage structure is arranged in the compression chamber and used for clamping a ball. The utility model provides a liquid expansion mandrel fixing device for processing a hard chromium plated ball, which can solve the problems that the clamping force is concentrated on a local area and a plating layer is easy to crush due to the single-cavity design of the existing liquid expansion mandrel.

A method for manufacturing an electrical terminal block (5) comprising at least one contact component (1) with a contact surface (11-13), comprising the following steps: A Manufacturing (101) of a contact component (1) made of a steel material; B. Applying a thin-film passivation layer (104) to the contact component (1) with a zinc-containing coating material (4) which has at least one further species selected from the following elements: chromium, cobalt and / or vanadium and C Thermal post-treatment (106) of the coated contact component; and electrical terminal block.

The present invention relates to the use of a trivalent chrome plating bath composition for the electrodeposition of a hard chrome layer with a thickness of 1 µm or more, the composition comprising (A) trivalent chromium ions in an amount of 5-40 g / l, (B) at least one anion selected from sulfate, chloride, bromide and methanesulfonate, (C) at least one carboxylate ion selected from formate and acetate, (D) at least one buffer substance selected from ammonia, boric acid, carboxylic acids with 2 to 8 carbon atoms other than component (C) and salts thereof, and aluminium salts, and (E) 0.01 to 100 g / l of at least one specific compound which comprises a sulfonate group and a sulfide or disulfide group. Other aspects of the invention relate to a hard chrome plating process, a hard chrome plating layer and a hard chrome plated article.

The utility model discloses an aerogel felt integrated composite aluminum veneer, which belongs to the technical field of aluminum veneers, and comprises an aluminum veneer body, the aluminum veneer body comprises an aluminum alloy panel main body, a chemical treatment layer and a chromium plating layer, the upper surface of the chromium plating layer is fixedly connected with an aerogel felt layer, and the aerogel felt layer is fixedly connected with the aluminum alloy panel main body. The upper surface of the aerogel felt layer is fixedly connected with a polyvinylidene fluoride resin layer, the upper surface of the polyvinylidene fluoride resin layer is fixedly connected with a fireproof layer, and the upper surface of the fireproof layer is fixedly connected with a silencing honeycomb layer; through the chromium plating layer, the aerogel felt layer, the polyvinylidene fluoride resin layer, the fireproof layer, the silencing honeycomb layer, the sound insulation plate layer and the anti-corrosion paint layer, the wear resistance, the corrosion resistance, the fire resistance, heat preservation and sound insulation functions of the aluminum veneer body can be improved, the use effect of the aluminum veneer is effectively improved, and through the reinforcing ribs, the mounting corner connectors and the mounting holes, the service life of the aluminum veneer is prolonged. The overall stability of the aluminum veneer can be improved, and installation work of the aluminum veneer body is facilitated.

The utility model discloses a tool for surface treatment of cutting pliers, and relates to the field of cutting pliers production. The tool for surface treatment of the cutting pliers comprises multi-section type electric telescopic rods, the multi-section type electric telescopic rods are symmetrically and fixedly connected to the two sides of a chromium plating pool, a top plate is fixedly connected between the telescopic ends of the two multi-section type electric telescopic rods, and the tool further comprises a containing plate connected to the lower side of the top plate through a connecting rope; a plurality of rows of through placing openings are formed in the placing plate at equal intervals; compared with the prior art in which the cutting pliers are uniformly placed in a placing basket and then immersed in a chromium plating pool through the placing basket, the problem that the quality of chromium plating is affected due to the fact that the pliers heads of a plurality of cutting pliers are attached together can be solved through matched use of the connecting rope, the placing plate, the through placing opening and other parts, and the working efficiency is improved. And the quality of chromium plating treatment on the surface of the pliers head of the cutting pliers is effectively improved, rework is reduced, and the production efficiency of the cutting pliers is guaranteed.

The invention discloses a method for preparing a hydrophobic coating on an electroplated chromium surface, which comprises the following steps: adding dispersion liquid of nano particles into chromium plating liquid to obtain composite chromium plating liquid, and electroplating a workpiece by using the composite chromium plating liquid to obtain a chromium plating layer, the nano particles are at least one of silicon dioxide, silicon carbide or silicon nitride, silica sol and silicon-fluorine-containing resin are sequentially applied to the chromium plating layer, and the hydrophobic coating is obtained after drying. According to the invention, the nano particles are doped with the electroplated chromium, the chromium plating layer contains Si, so that Si-OH bonds are formed on the surface of the electroplated chromium, silica sol is used as a silicon transition layer, the lower part of the silica sol can form Si-O-Si chemical bonds with Si-OH in the chromium plating layer, and the upper part of the silica sol can form Si-O-Si chemical bonds with Si-OH bonds in silicon-containing fluorine resin; and the binding force of the hydrophobic coating and the chromium plating layer is greatly improved.