12 results about "Bluing" patented technology

The application relates to a strip steel bluing production line which comprises a feeding mechanism, a heating and cooling mechanism, a conveying mechanism and a discharging and winding mechanism which are sequentially connected, a cleaning mechanism is arranged between the feeding mechanism and the heating and cooling mechanism, the cleaning mechanism comprises a cleaning tank, a first guide roller is arranged at the inlet end of the cleaning tank, an oil scraping device is arranged at the outlet end of the cleaning tank, the heating and cooling mechanism is provided with two groups, namely a first heating and cooling mechanism and a second heating and cooling mechanism, a tension adjusting mechanism and a cooling and drying mechanism are arranged between the first heating and cooling mechanism and the second heating and cooling mechanism, the conveying mechanism comprises a base, a transmission conveying device for conveying the strip steel is arranged above the base, and an oiling device for smearing rust-proof oil on the surface of the strip steel is arranged at the inlet side of the transmission conveying device. The application has the effects of realizing automatic operation of strip steel bluing treatment and improving the efficiency and quality of strip steel bluing treatment.

This invention discloses a sintered NdFeB magnet and its bluing process, relating to the field of magnet corrosion protection technology. The bluing process includes the following steps: dry polishing of the NdFeB black sheet using a composite polishing medium to remove surface oil, dust, and a dense oxide layer, exposing a fresh active substrate and forming a rough interface; the composite polishing medium consists of stone particles, shell particles, and sawdust; and bluing the polished NdFeB black sheet to induce an oxidation reaction on the substrate surface, generating a blue Fe3O4 protective film. This bluing process achieves a magnetic loss repair rate of up to 1.19%, while simultaneously achieving zero chemical emissions, zero wastewater generation, and replacing expensive controlled atmospheres with zero-cost air. It also fundamentally solves the rigid constraints of process connections caused by wet material overprinting, providing a surface protection solution for NdFeB magnets that combines environmental friendliness, high corrosion resistance, magnetic property repair capabilities, and low cost.

The application belongs to the technical field of motor core manufacturing, and discloses a motor core heat treatment method. The motor core heat treatment method comprises the following steps: S1, an oil removal stage: placing the core into a heat treatment furnace, starting the heat treatment furnace, increasing the furnace temperature to 400 DEG C and keeping the temperature for 30 minutes to remove the oil stains on the core; S2, a temperature increasing stage: increasing the furnace temperature to 660 DEG C; S3, a rapid annealing stage: increasing the furnace temperature to 690 DEG C and keeping the temperature for 30 minutes, and then decreasing the furnace temperature to 600 DEG C; S4, a secondary annealing stage: increasing the furnace temperature to 690 DEG C and keeping the temperature for 30 minutes, and then decreasing the furnace temperature to 660 DEG C and keeping the temperature for 10 minutes; S5, a bluing stage: decreasing the furnace temperature and keeping the temperature for 40 minutes to carry out the bluing treatment on the core; and S6, a temperature decreasing stage: decreasing the furnace temperature to room temperature. The motor core heat treatment method can guarantee the treatment effect of the core, shorten the time of the whole temperature increasing and keeping stages, and greatly reduce the energy consumption of the core heat treatment.

The present invention discloses a room-temperature bluing solution suitable for alloy steel and its use method. The chemical components and weight proportions involved in the bluing solution are as follows: 18-240g / LNaOH, 15-30g / LNaNO2, 35-50g / LNaNO3, 1-4g / LK4P2O7, 3-12% H2O2, 2-8g / LNa3PO4, 1-4g / L of complexing agent, 1-3ml / LOP-10, pH=10-14. These chemical reagents are added to water at the same time according to the ratio and stirred evenly to obtain the bluing solution. The bluing process is as follows: the surface of the alloy steel is polished until it is smooth and has no obvious scratches, then alkaline washing and degreasing are performed, the surface is cleaned, pre-oxidized by high-temperature heating, quenched and blued for a certain period of time, removed, cleaned, dried, and then saponified for a certain period of time to obtain a layer of dark blue and dense oxide film on the surface. The bluing agent provided by the present invention can be used at room temperature, has low energy consumption, is environmentally friendly and low cost, is suitable for quenching bluing of low-alloy steel, and the oxide film layer prepared using the bluing liquid has the characteristics of being smooth and dense, low porosity, good adhesion, stability, and good corrosion resistance.

The present invention relates to a heat treatment method and a heat treatment furnace that allows obtaining characteristics at the same level as when bluing is performed, without the bluing process being carried out during stress-relieving annealing of a motor core. One heat treatment method according to one embodiment of the invention is a stress-relieving annealing method for a motor core. The heat treatment method includes an annealing step for annealing the motor core using an exothermic converted gas as the furnace atmosphere, and a cooling step for cooling the motor core obtained in the annealing step, using an exothermic converted gas as the furnace atmosphere, to a temperature range from the annealing stage temperature down to 500°C at a cooling rate exceeding 600°C per hour.

The application discloses a non-oriented silicon steel steam bluing method, and belongs to the technical field of metal surface modification, and comprises the following steps: S1: non-oriented silicon steel treatment; S2: non-oriented silicon steel pickling activation; S3: blow drying; S4: assembling a steam bluing device; S5: non-oriented silicon steel preheating, reaching a set temperature, and passing in water vapor; the heated non-oriented silicon steel is subjected to bluing in the water vapor environment; after the bluing is completed, cooling to room temperature; and the non-oriented silicon steel completes steam bluing; the non-oriented silicon steel is heated by a high-frequency induction heating coil; compared with the prior art, the heating rate of the non-oriented silicon steel can be accelerated, the efficiency of steam bluing of the non-oriented silicon steel is accelerated, the steam bluing time of the non-oriented silicon steel is shortened, cost loss is reduced, and the steam bluing effect is good.

The invention discloses a high alloy steel workpiece surface laser bluing process, which belongs to the field of metal surface treatment, and comprises the following steps: preparing a catalyst comprising ethanol, hydrogen peroxide, hydrochloric acid, sodium carboxymethyl cellulose, gas-phase nano silicon dioxide and deionized water; the catalyst comprises the following components in percentage by volume: 60-70% of ethanol, 10-12% of hydrogen peroxide, 8-10% of sodium carboxymethyl cellulose solution, 2% of gas-phase nano silicon dioxide dispersion liquid, 8-16% of deionized water and 0.25% of hydrochloric acid. The prepared catalyst is sprayed on the surface of a high alloy steel workpiece, and a layer of light yellow oxidation film is formed; laser is adopted to irradiate the surface of the high-alloy steel workpiece sprayed with the catalyst, bluing treatment is carried out, and a uniform Fe3O4 corrosion-resistant layer with the thickness of about 2-20 microns is formed on the surface of the high-alloy steel workpiece after bluing treatment is completed. According to the invention, the high-alloy steel workpiece has very strong corrosion resistance in air, a humid environment or an industrial environment.

The invention relates to a strip steel surface bluing process adopting an electroplating method. The strip steel surface bluing process comprises the following specific steps: (1) cleaning and activating degreased and pickled strip steel; (2) injecting an electroplating solution into the electroplating bath, wherein the electroplating solution adopts a sodium hydroxide solution with the mass concentration of 5%-10%; (3) adjusting the temperature of the electroplating solution to 50-80 DEG C; (4) current is introduced into the electroplating liquid, and the current power is 16-18 KVA; (5) generating an oxidation film on the surface of the strip steel after the strip steel passes through the electroplating liquid in the electroplating bath; and (6) rinsing and drying the steel strip after the steel strip leaves the electroplating bath. The electroplating equipment is used for enabling the surface of the strip steel to be subjected to bluing reaction by electrolyzing the sodium hydroxide solution, a compact oxidation film is formed on the surface of the strip steel, normal-temperature bluing treatment of the strip steel is achieved, and the production efficiency of the strip steel is improved.

The utility model relates to a bluing, galvanizing and painting integrated energy-saving and environment-friendly production line for packaging steel belts, and belongs to the technical field of steel belt processing. The electric heating bluing device is in butt joint with the tail end of the steel belt slitting device, the pickling tank is in butt joint with the tail end of the electric heating bluing device, the galvanizing device is in butt joint with the tail end of the pickling tank, and the painting device is installed at the tail end of the galvanizing device. Blueing equipment, galvanizing equipment and painting equipment are integrated on one production line, and equipment at the front end and equipment at the rear end are shared, so that the construction cost input is reduced, and the utilization rate of the equipment at the front end and the rear end is increased; during production, corresponding equipment can be started as required for production; when galvanization is needed, the motor drives the swing wall to press the steel belt into the galvanization bath through the compression roller for galvanization, and when galvanization is not needed, the motor drives the swing wall to lift the compression roller, and the steel belt is lifted to the top of the galvanization bath along with the compression roller under the action of tensile force. And the steel belt threading work can be performed without cutting off the steel belt when the galvanization work is switched, so that the switching is convenient, time-saving and labor-saving.

This utility model belongs to the field of corrugated pipe technology, and particularly relates to an enhanced stainless steel braided corrugated pipe with a straight head and an elbow connected to both ends of the pipe body. The pipe body is the main channel for fluid transportation and is made of stainless steel, which has good corrosion resistance and strength. Straight heads or elbows can be set at both ends of the pipe body according to different needs. Transformer joints are welded between the pipe body and the straight head, and between the pipe body and the elbow. A connecting nut is fixedly fitted at the other end of the straight head and the elbow, and the inner wall of the connecting nut is provided with a thread. The addition of a transformation joint between the pipe body and the straight head or elbow isolates the discoloration problem at the welding position. After welding, bright annealing is performed to ensure that there is no discoloration on the inner surface of the product. Compared with the prior art, the welding transformation joint will not have defects such as weld slag, weld spots, yellowing, blackening, or bluing. Moreover, the setting of the transformation joint can enhance the pressure resistance of the stainless steel braided corrugated pipe.

The application discloses a kind of production methods of non-oriented silicon steel, non-oriented silicon steel and variable frequency compressor, it is related to electrical steel technical field, comprising the following steps: the molten steel is continuously cast into the thin slab of thickness 60mm-80mm;Thin slab is hot-rolled, and the hot-rolled plate of thickness 1.8mm-2.0mm is obtained;Hot-rolled plate is sequentially normalized, pickled and cold-rolled, and the cold-rolled plate of thickness 0.20mm-0.35mm is obtained;Cold-rolled plate is annealed and blued, and the non-oriented silicon steel is obtained;The process of bluing includes: under the condition that water vapor and inert gas are simultaneously introduced into annealing furnace, heat treatment is carried out, Fe3O4 insulation layer is generated in situ on the surface of cold-rolled plate after oil removal, the volume fraction of water vapor is controlled to be 20%-30%, the operating temperature is controlled to be 515 DEG C-525 DEG C, and the holding time is 2min-5min.The application keeps excellent magnetic properties while reducing thickness and improving insulation.