58results about How to "Improve powder utilization" patented technology

The invention discloses a preparation method for a wear-resistant and corrosion-resistant composite coating layer. The preparation method specifically comprises the following steps: S1. carrying out pretreatment on a cladding matrix; S2. carrying out drying treatment on a cladding material; S3. melting the cladding material and the surface layer of the cladding matrix simultaneously through a laser device and in combination with a coaxial powder feeding method to form an alloy coating layer, that is, the high-hardness corrosion-resistant layer, wherein the cladding matrix in the step S1 is made from Q960 steel; and the cladding material in the step S2 is made from the mixture of tungsten carbide powder and Stellite 6 alloy powder. According to the preparation method disclosed by the invention, the composite coating layer is creatively prepared on the surface of the Q960 steel through a laser cladding technology; the tungsten carbide powder and the Stellite 6 alloy powder are mixed as the cladding material in a specific ratio; and the process parameters of the laser cladding technology are scientifically and reasonably designed, so that the problems of low hardness and short servicelife under the working condition of abrasive wear, of a laser cladding coating layer made from Stellite 6 cobalt alloy, are effectively solved.

The invention discloses a continuous cyclic powder spreading structure and additive manufacturing molding equipment. Side plates and a top plate are arranged on a bedplate. A printing molding cavity is formed by the bedplate and a cylinder body arranged at the lower end of the bedplate. The continuous cyclic powder spreading structure is arranged in the printing molding cavity, and continuous powder spreading in the printing molding process is achieved. Up-and-down movement of a printing substrate in the cylinder body is achieved by utilizing a driving device. Then the printing surface on theprinting substrate is printed and molded by utilizing a light path scanning structure arranged at the inner upper end of the printing molding cavity. Molding through holes are formed in a gear bearingand the middle of the bedplate correspondingly so that it is convenient for light path scanning structure laser and the printing surface on the printing substrate at the lower end of the bedplate tomold. The light path scanning structure is located at the upper end of the continuous cyclic powder spreading structure and can work simultaneously with a powder spreading scraper so that powder spreading and scanning molding are conducted, and that is to say, an efficient printing process that powder spreading is conducted while scanning is conducted can be achieved. By means of the continuous cyclic powder spreading structure and the additive manufacturing molding equipment, molding efficiency of parts is improved; and meanwhile, the printing substrate moves up and down in the cylinder body,the molding area is limited, and the utilization rate of powder is improved.

The invention discloses a sieve hole built-in type annular laser cladding nozzle which comprises a laser head connection part, a middle part sleeve part and a nozzle part; the laser head connection part is composed of an upper connection sleeve which is connected with a laser head; the middle part sleeve part is composed of a sliding sleeve which is connected with the upper connection sleeve; protective glass is arranged between the lower end of the sliding sleeve and the upper end of a center sleeve; a protective glass water cooled jacket is in threaded connection with the sliding sleeve and the center sleeve; a protective gas hole is formed in the center sleeve; a nozzle part is composed of a conical nozzle core which is connected with the center sleeve; and the outer side of each of the conical nozzle core and the center sleeve is sequentially provided with a powder inlet sleeve, a gas inlet sleeve and a water cooled jacket. The sieve hole built-in type annular laser cladding nozzle overcomes the disadvantages that the service life is short, a powder convergence diameter cannot be regulated, and the existing laser cladding nozzle cannot be suitable for powder particles in different sizes.

The invention provides a manufacturing method of an aluminum rotary target material. The method comprises S1, aluminum powder with the average grain diameter D50 of 10-80 micron is manufactured; S2, astainless steel tube or a titanium tube is taken as a target material base tube, and surface sand blasting treatment is conducted on the target material base tube; S3, cold spraying and forming are conducted, the manufactured aluminum powder is loaded into a cold spraying powder feeder, the processed target material base tube is installed on a transmission device to enable the target material base tube to rotate, a cold spraying gun and the target material base tube do relative motion in the horizontal direction to prepare the target material; and S4, the sprayed target material is machined into that with required size and precision, and a finished product is prepared. According to the method, the manufacturing process of the aluminum rotary target material is simple, the density of the manufactured aluminum rotary target material is far higher than that of a traditional thermal spraying technology, the relative density can reach 95-99%, the oxygen content is lower than that of the traditional thermal spraying technology, grain tissues are uniformly refined, the yield is high, the powder utilization rate is high and large-scale production is facilitated.

The invention provides a cooking utensil and a preparation method thereof. The preparation method of the cooking utensil comprises the steps that S10, graphite is used for preparing a base body; and S20, a non-sticking coating is prepared on the inner wall face of the base body, wherein the step S20 specifically comprises S214, namely powder coating is sprayed on the inner wall face of the base body by an electrostatic spraying method to prepare a surface layer. According to the preparation method of the cooking utensil, the electrostatic spraying method is used for prepare the surface layer on the graphite base body, so that the comfort of operation during spraying is improved, the working condition is improved, and the environment is not polluted; because of the good adsorption of the graphite base body, sandblasting treatment is not required before spraying, and the manufacturing cost of the cooking utensils is reduced.

The invention discloses an intelligent laser cladding head with the automatic temperature and powder feeding amount debugging function. The laser cladding head comprises a base sleeve, a focus lens, a focus lens sleeve, a nozzle core, a cold water sleeve, a protection lens, a simple body and other basic components, and a contact type temperature sensor and an ultrasonic powder density detection instrument are further designed; in order to achieve the functions, except for the intelligent laser cladding head, a laser device, a cold water unit, a powder feeding device, a laser device and a control box are matched with the characteristics internally so that the functions are achieved, and a real-time effective closed-loop system is formed; under the normal work state of the laser device, the intelligent laser cladding head detects the real-time temperature of a laser cladding head through the contact type temperature sensor, data are transmitted to a computer controller, the computer controller carries out comparison according to rated value of the set program, judgment is carried out, according to the judgment result, a refrigeration command is issued to the cold water unit in real time, and the cold water unit regulates the refrigeration frequency according to the command; as well, the intelligent laser cladding head detects the real-time powder feeding density of the laser cladding head through a solid powder detection system, the data are transmitted to the computer controller, the computer controller carries out calculation according to the formula of the set program, the data are converted into the powder feeding amount, the data and the set value are compared, judgment is made, according to the judgment result, a powder feeding adjusting instruction is issued to the powder feeding device in real time, the set value of the powder feeding device is changed through the computer controller, and therefore the powder feeding amount is changed through the powder feeding device, and the optimal powder feeding effect is achieved.

The invention discloses a surface treatment method for bathroom hardware. The surface treatment method for the bathroom hardware includes the following steps of (1) grinding; (2) cleaning and drying; (3) electrostatic spraying processing, specifically, the cleaned and dried bathroom hardware workpiece is put into a spraying chamber built by a high-voltage electrostatic generator, powdery paint is sprayed on the bathroom hardware workpiece through a spraying gun, and through electrostatic reaction, the powdery paint can be uniformly adsorbed to the bathroom hardware workpiece; (4) heating, drying and curing, specifically, the sprayed workpiece is put into a drier to be heated, the sprayed paint is solidified and hardened, and single-color surface spraying processing is realized; (5) pattern attaching, specifically, patterned paper printed with patterns is torn off a carrier, uniformly attached to the bathroom hardware workpiece heated, dried and cured in the step (4), and naturally dried for 1.5-3 h, and then a protective film on the patterned paper is torn off; and (6) baking and reinforcing, specifically, the bathroom hardware workpiece with the patterns attached is put into baking equipment, baked for 30-50 min at the high temperature of 120-180 DEG C, and cooled at normal temperature.

The invention provides composite powder for preparing a self-repairing coating, a preparation method of the composite powder, a titanium-based wear-resistant self-repairing coating and a preparation method of the titanium-based wear-resistant self-repairing coating. The preparation method of the composite powder comprises the following steps: firstly, mixing powder materials (layer silicate mineral powder, Al powder and Ti powder), a nitrate solution, a dispersing agent and a binder, and performing ball milling to obtain slurry; secondly, carrying out spray drying to obtain spherical composite powder particles; and finally, performing chemical vapor deposition treatment in an environment containing carbon source gas to form a carbon nanotube coating layer on the surface of the spherical composite powder, thereby obtaining spherical composite powder coated with carbon nanotubes (namely CNT). The composite powder is used as a raw material, and the wear-resistant self-repairing coating is prepared on the surface of a metal matrix through the steps of matrix surface pretreatment, cold spraying, re-melting treatment, heat treatment and the like. The titanium-based wear-resistant self-repairing coating provided by the invention has high hardness and good wear resistance, and has a wear self-repairing function in oil lubrication, dry friction and vacuum environments.

The invention relates to a base plate dimension adjustment device for powder feeding under double cylinders. The base plate dimension adjustment device comprises a forming cylinder adjustment device (1) and a powder cylinder adjustment device (2), wherein the forming cylinder adjustment device (1) comprises a support frame I (4), a support plate I (5), an inner cylinder I (6), an inner cylinder bottom plate I (7), a connection rod I (8) and a base plate (9); the forming cylinder adjustment device is arranged in the outer cylinder (3) of a forming cylinder and located on the upper part of an outer cylinder bottom plate (10) of the forming cylinder; the powder cylinder adjustment device (2) comprises a support frame II (12), a support plate II (13), an inner cylinder II (14), an inner cylinder bottom plate II (15) and a connection rod II (16); and the powder cylinder adjustment device is arranged in the outer cylinder (11) of a powder cylinder and located on the upper part of an outer cylinder bottom plate (17) of the powder cylinder. The base plate dimension adjustment device disclosed by the invention increases the powder utilization rate of a powder spreading plane, reduces the powder use amount, and lowers the base plate expense and the powder use cost.

The invention discloses a C-N-O supersaturated solid solution martensitic stainless steel powder, a preparation method and a cladding method, and relates to the technical field of laser additive and re-manufacturing. The elements contained in the powder comprise, by weight, 0.18-0.23 part of C, 0.09-0.12 part of N, 0.75-0.90 part of Si, 12.0-14.0 parts of Cr, 0.80-0.95 part of Mn, 1.30-1.80 partsof Ni, 0.45-0.55 part of Al, 0.22-0.30 part of V, 0.045-0.055 part of O, and 81.1-84.16 parts of Fe. After the above elements undergo vacuum melting according to a proportion, the C-N-O supersaturatedsolid solution martensitic stainless steel powder can be obtained by adopting high-purity nitrogen gas atomization. The method for cladding a laser forming layer based on the powder comprises the following steps that 1, raw material treatment is performed; 2, parameter setting is performed; and 3, cladding of the laser forming layer is performed. According to the C-N-O supersaturated solid solution martensitic stainless steel powder, the preparation method and the cladding method, laser fast cooling is used for inducing the non-equilibrium phase change, three interstitial atoms of C-N-O are dissolved in a body-centered structure in a supersaturated mode, then the martensite is formed, and a self-organizing interstitial atom short-range combined unit with the relatively lower energy stateis formed through short-range migration.

The invention provides a laser cladding method for the inner wall of a hydraulic support oil cylinder. The laser cladding method comprises the following steps that step 1, defect machining treatment and cleaning treatment are conducted on the inner wall of the hydraulic support oil cylinder before cladding; step 2, laser cladding is conducted on a deep hole bottom end corner area and a chamfer structure area of the inner wall, treated in the first step, of the hydraulic support oil cylinder through an oblique angle coaxial powder feeding laser cladding device, and a cladding layer is formed; step 3, laser cladding is conducted on other inner wall areas, subjected to cladding in the second step, of the hydraulic support oil cylinder through a wide light spot paraxial broadband powder feeding laser cladding device, and a cladding layer is formed; and step 4, finished product aftertreatment machining is conducted on the inner wall, subjected to cladding in the third step, of the hydraulicsupport oil cylinder. According to the laser cladding method, the manner of combining two cladding technologies is adopted for conducting laser cladding treatment on the inner wall of the oil cylinder to be subjected to cladding, meanwhile, the beneficial effects of the wide light spot laser cladding technology and the beneficial effects of the oblique angle coaxial laser cladding technology areconsidered, and the production cost of cladding of the inner wall of the hydraulic support oil cylinder is reduced.

The invention belongs to the technical field of metal machining, in particular to a treatment method for improving abrasion resistance and toughness of a rotary blade, and belongs to the technical field of rotary blade machining. The treatment method has the advantages that the treatment method is simple, the cost is low, the rotary blade can be improved continuously without breaking and bending,wear resistance can be improved, the load of a tractor can be greatly reduced, the soil crushing capacity is high, the sharpness is high, the wear resistance is high, green and environmentally friendly and the like; and the requirement for fine tillage can be met, the working procedure interval is shortened, the replacement frequency of the rotary blade is reduced, and the working efficiency is improved, the strength is high, the toughness is good, the rotary blade is not only wear-resistant, but also does not break and bend when colliding hard objects such as bricks and stones.

The invention discloses a preparation method of an electrical contact strengthened coating on a metal surface. The method is characterized by comprising the steps of: roughening and pre-cleaning the metal surface; selecting a wear-resisting and corrosion-resisting powder material as a coating material; preparing bonder slurry and coating powder material into liquid coating and spraying the coating on the metal surface; and strengthening the pre-coating by an electrical contact strengthening device. The coating is molten on the metal surface by the electrical contact strengthening technology, so that the coating with good surface quality, less inner defect, high hardness and high wear resistance and corrosion resistance can be obtained on the metal surface, and the service life of a workpiece is prolonged. The pre-coating is prepared by the pre-coating method of the liquid coating, so that the powder utilization ratio is improved, the operation is simplified and the cost is saved; and the method is beneficial for industrial popularization and application.

The invention discloses a process for achieving laser cladding of a silver layer on the surface of a high-current aluminum bus hardware terminal. The process comprises the following steps that 1, thesurface of the high-current aluminum bus hardware terminal is pretreated, surface oxide is removed through manual polishing, and it is ensured that the workpiece surface is exposed out of a matrix aluminum alloy material; 2, a supporting base plate is installed on the side, not to be clad with the silver layer, of the high-current aluminum bus hardware terminal, and a whole workpiece is installedon a workbench; 3, the portion to be clad with the silver layer is cleaned, residual oil contamination on the surface is removed, and it is ensured that the silver layer preparation face is sufficiently clean; 4, silver cladding treatment is carried out on one side of the high-current aluminum bus hardware terminal through laser cladding equipment; and 5, the two sides of different hardware terminals on a large-current aluminum bus are subjected to silver cladding treatment through the operation in the steps 2-4, and the place, clad with the silver layer, of the workpiece is polished, and treatment is complete. The obtained silver coating is compact, and has the good bonding effect with the matrix.

The invention discloses a light high-conductivity slip ring and a preparation method. the light high-conductivity slip ring comprises a base material and a coating covering the base material; the base material comprises, by mass, 5-10% of graphene and 90-95% of titanium hydride; and the coating comprises, by mass, 0.5-1.3% of lanthanum oxide, 1-2% of tungsten sulfide and 7-12% of carbon nanotubes, and the balance is silver. The coating is cladded on the surface of the base material made of powder metallurgy through an ultra-high-speed laser cladding technology to form the coating of the slip ring. According to the conductive slip ring, light weight is achieved, the hardness and the arc corrosion resistance of the slip ring coating are enhanced, the antifriction and wear-resistant capacity of the working face of the slip ring is improved, the current-carrying performance is also improved compared with that of pure silver, the process is simple, and the manufacturing cost of the conductive slip ring for spaceflight is reduced.