330results about How to "Improve surface cleanliness" patented technology

The invention provides a pipe fitting and shell welding method and application. According to the welding method, one end of a pipe fitting is made of a steel material and stretches into a shell from the neck portion of the shell, and the neck portion of the shell is made of a steel material; one end of the pipe fitting and the neck portion of the shell are connected through welding by means of the welding method adopting electric energy as the heat source, or one end of the pipe fitting and the neck portion of the shell are connected through welding by means of the welding method adopting electric energy as the heat source and furnace brazing.

The invention discloses a bright welding wire for heat-resistant steel for an ultra-supercritical coal-fired power station and belongs to the technical field of welding materials. The welding wire comprises, by weight, 0.10-0.15% of C, 8.5-9.0% of Cr, 0.1-0.6% of Ni, 0.3-0.6% of Mn, 2.5-3.0% of Co, 2.0-2.7% of W, 0.020-0.035% of Nb, 0.001-0.010% of Zr, less than or equal to 0.006% of N, 0.16-0.20%of V, 0.003-0.010% of B, less than or equal to 0.20% of Si, less than or equal to 0.006% of P, less than or equal to 0.006% of S, less than or equal to 0.010% of O, less than or equal to 0.03% of Al,less than or equal to 0.01% of Ti and the balance Fe and inevitable impurity elements. The bright welding wire has the advantages that the welding wire has good welding process performance and excellent deposited metal flowability and formability, and the deposited metal after welding has excellent mechanical properties and good room temperature impact toughness.

The invention provides an efficient ultra-precise polishing method based on a shear expansion effect. Abrasive particles, a dispersing agent and an active agent are added into a viscoelastic materialwith non-Newtonian fluid characteristics to prepare a flexible fixation grinding tool, a viscoelastic gum base accounts for 50%-85% of the grinding tool by mass, the abrasive particles account for 10%-45% of the grinding tool by mass, the particle size of the abrasive particles ranges from 0.05-50 microns, the dispersing agent accounts for 1-5% of the grinding tool by mass, and the active agent accounts for 1-5% of the grinding tool by mass. In the polishing process, the contact area between the grinding tool and a workpiece generates a shear expansion effect under the action of shear force, an instantaneous expansion ejection phenomenon and a curing effect are present, and the viscosity, the hardness and the internal resistance of the grinding tool materials are increased. The stress uniformity of the surface of the workpiece is improved, the contact positive pressure of the abrasive particles and the workpiece is increased, so that the removal rate of the materials in the polishing process is increased, damage of local stress concentration to the surface of the workpiece is reduced, and the effect of efficient and high-quality polishing is achieved.

The invention provides a screen printing production line of an image coding steel plate. The screen printing production line of the image coding steel plate combines screen printing and roller painting, and not only can obtain accurate underpainting patterns, but also can obtain a thick and strong three-dimension printing layer. Meanwhile, a servo control system which controls rotate speed and starting time of a suction roller and a coating roller of a roller coating equipment element is added at a roller painting section to ensure that actual roller surface line speed is consistent with process rotate speed, accordingly line stopping adjustment is not needed in the process of production, and production efficiency is improved.

The invention discloses a method for preparing a glow discharge mass spectrometer analysis test sample. The method comprises the following steps: a) putting refractory metal powder to be analyzed into a graphite mold which is internally coated with a demolding agent; b) forming the powder by using a pressure sintering method; c) milling a formed blank. By using the method disclosed by the invention, the test sample is relatively high in compactness and is clean in surface while the content of impurities in the sample is kept unchanged as much as possible, so that the accuracy and the precision of the glow discharge mass spectrum analysis result are ensured, and meanwhile the test sample prepared by using the method has the advantages of high analysis speed and high efficiency.

The invention discloses a corrugated fin aluminum foil base material for a heat radiation tower. The corrugated fin aluminum foil base material comprises, by mass percent, 0.05%-0.15% of Si, 0.2%-0.3%of Fe, not larger than 0.02% of Cu, 0.03% of Mn, not larger than 0.03% of Zn, 001%-0.03% of Ti and the balance Al. The invention further discloses a preparation method of the corrugated fin aluminumfoil base material for the heat radiation tower. The preparation method comprises the steps that a cast-rolled coiled material blank is firstly subjected to cold rolling to the set thickness, then homogenizing annealing is carried out, after homogenizing annealing is carried out, cold rolling is carried out to reach the set thickness, intermediate annealing is carried out, and finally cold rollingis carried out to reach the finished product thickness. The corrugated fin aluminum foil base material has the excellent machining performance, the strength is stable, plasticity is good, the problemof punching cracking of the corrugated fin aluminum foil base material for the heat radiation tower in the corrugated fin aluminum foil machining process is effectively avoided, and the machining efficiency is greatly improved.

The invention relates to a process arrangement method for mixed jet cleaning. The method employs high-pressure mixed jet descaling units having a plurality of abrasive materials with different granularities. The high-pressure mixed jet descaling units are arranged along a tape transport direction of a metal plate. The high-pressure mixed jet with large granularity abrasive materials is arranged at an original inlet area of the metal plate, with the granularity of 20 meshes-60 meshes and inject pressure of 15 MPa-80 MPa; the high-pressure mixed jet with medium granularity abrasive materials is arranged at downstream of the high-pressure mixed jet descaling unit with the large granularity abrasive materials, with the granularity of 40 meshes-80 meshes and inject pressure of 10 MPa-60 MPa; the high-pressure mixed jet descaling unit with small granularity abrasive materials is arranged at downstream of the high-pressure mixed jet descaling unit with the medium granularity abrasive materials, with the granularity of 60 meshes-120 meshes and inject pressure of 10 MPa-50 MPa; the metal plate realizes the front and back descaling of the metal plate via the above jet descaling units; and the washing of the metal plate is finished by passing the descaled metal plate through a high-pressure pure water cleaning unit, a wiping unit and a compressed air blowing unit. The complete removing treatment of the scales on two sides of the coal metal plate is realized via a jet way.

The invention discloses a preparation method of high-strength hot galvanizing Q&P steel. The preparation method is characterized by comprising the following steps: preparing low-carbon alloy steel into a to-be-used steel product; heating the to-be-used steel product to an austenitizing temperature and keeping the temperature for 3-5 minutes; performing primary quenching cooling in a cooling cavity with a protective gas until the temperature is between an Ms point and an Mf point, and keeping the temperature for 0.5-3 minutes; heating to 450-500 DEG C, performing distribution processing, keeping the temperature for 0-5 minutes, quickly adding into a constant-temperature galvanizing bath isothermal with the steel product, performing hot galvanizing, further performing distribution processing, and keeping the temperature for 10-60 seconds; and performing secondary quenching cooling until the temperature is reduced to the room temperature. By adopting the preparation method disclosed by the invention, the aim of simultaneously finishing a Q&P process and hot galvanizing treatment is achieved, the process flow is simplified, the production efficiency is improved, and high-strength hot galvanizing alloy steel is prepared.

The invention provides a physical pretreatment and electrophoresis coating process of an aluminum magnesium alloy, which is divided into two items of physical pretreatment and electrophoresis coating, wherein the physical pretreatment is surface abrasive blasting; and in the surface abrasive blasting process, the size of abrasive grains is determined according to the roughness required by the surface of a workpiece. The invention also discloses the process steps of the physical pretreatment and the electrophoresis coating of the aluminum magnesium alloy, which comprise abrasive selecting, spray gun adjusting, abrasive blasting, dedusting, electrophoresis coating, cleaning and drying, ceramic coating spraying and drying. The physical pretreatment and electrophoresis coating process of the aluminum magnesium alloy adopts the treatment process combining the abrasive blasting treatment and the electrophoresis coating, not only reduces the environment pollution and the damages to the human body, but also has the advantages of simple process operation, low cost, environment protection, no toxin, good surface cleanness, tight and firm combination of the coating obtained by an electrophoresis coating and a substrate of the workpiece, good adhesion, compact and attractive surface coating of the aluminum magnesium alloy, and obvious corrosion resistance enhancement.

The invention discloses a method for processing canned white asparagus by vacuum acidification, comprising the following steps: carrying out ultrasonic cleaning with a frequency of 20-30 kHz on processed white asparagus for 10-15 min, wherein the cleaning effect is good, the speed is fast, and the white asparagus materials are prevented from tender stem deterioration caused by long time soaking; after cleaning, precooking, then carrying out spray cooling on the precooked white asparagus with cold water under the high pressure of 30*10<5>-40*10<5> Pa for 1 min, rapidly cooling the white asparagus, then conducting vacuum acidification by using a compound liquid of disodium hydrogen phosphate and citric acid under the vacuum degree of 0.070-0.085 MPa for 1.5-2h to achieve the purpose of preventing browning; and finally adding 0.01% phytic acid and 0.01% sodium erythorbate in the liquid of the canned white asparagus to carry out color protection on the white asparagus and further carry out acidification. The prepared canned white asparagus has good whiteness and strong fragrance, the pulp has popular sweet mouthfeel, and the liquid is clear.

Described herein are UV curable coating comprising: an acrylate component a photoinitiator, an amine synergist, and an abrasive; along with methods of making and using same.

The invention discloses a selective area growing method for III-nitride micro graphic structure and a structure. A carbon nanotube array is taken as a micrometer/nanometer composite size mask; nanometer grade growing windows in bundle clusters and micrometer grade growing windows among the bundle clusters are arranged at intervals; according to the remarkable difference between the growth rates of III-nitride in the micrometer grade growing windows and the nanometer grade growing windows, an III-nitride dual-size micro graphic structure in which micro graphic structures which are the same in shapes and are different in sizes are arranged at intervals can be made on the micrometer/nanometer composite size mask. By adopting the carbon nanotube mask, the advantage of nanoheteroepitaxy can be brought into full play, the crystal quality of a micro graphic structural material is improved, and the residual stress is lowered; the nanotube has the characteristics of high thermal conductivity and high electrical conductivity, so that the heat dissipation of subsequently-manufactured micro-electron and photoelectron devices and the improvement on the electric property are facilitated.

The invention provides a production line for spraying a color steel plate, wherein a plurality of tension rollers are used to flatten a steel belt in each process section, and especially, stable constant tension is provided for an air-brush section. Meanwhile, in the production line for spraying the color steel plate, provided by the invention, corona treatment is performed on the surface of the steel belt before a spraying section to form a plurality of small pits in the surface of the steel belt, so as to improve the surface roughness of the surface of the steel belt, so that adhesive force between the surface of the steel belt and a color image layer is improved, the color image layer hardly undergoes paint peel-off phenomenon, and the formability of the steel belt is improved.

The invention discloses a metal wire thermal treatment surface oxidation resistance method. The method includes the following steps that (1) a container and a cotton ball are prepared, ethyl alcohol is then poured into the container or water and ethyl alcohol are poured into the container in a certain proportion, and the cotton ball is immersed in liquid of the container; (2) the temperature of a tube heating furnace is adjusted to 820-890 DEG C, a metal wire to be thermally treated moves in the tube heating furnace at a certain speed continuously, and meanwhile the wetted cotton ball extracted from the container is used for wiping the metal wire at a metal wire furnace feed tube opening; alternatively, production is conducted through the metal wire thermal treatment surface oxidation resistance method in the mode that mixed liquid of ethyl alcohol and water is injected along with a metal wire. No protective gas needs to be added in the thermal treatment process, no surface grinding processing is needed after thermal treatment, the surface cleanliness of the metal wire is greatly improved, and production efficiency of the metal wire is improved while the quality of the metal wire is guaranteed.

The invention relates to a fingerprint recognition device. The fingerprint recognition device comprises a substrate, a driving circuit and a photoelectric sensor array and cover plates, wherein the driving circuit and the photoelectric sensor array are arranged on the substrate and are used for recognizing fingerprints; and the cover plates are opposite to the substrate, are used for protecting the driving circuit and the photoelectric sensor array and can be protruded upwards so as to drain drips and/or grease. According to the fingerprint recognition device, a touch screen display, intelligent equipment and an intelligent robot, bulges are formed according to different thermal expansion coefficients between two layers of the cover plates, so that slipping of water stain or greasy dirt isfacilitated, the surface cleanness of the fingerprint recognition device is increased, and then the recognition success rate is increased; and furthermore, a plurality of fingerprint recognition devices are integrated into the touch screen display, so that the equipment safety is improved.