85results about How to "Crystallization" patented technology

The invention discloses a cobalt-containing nickel plated steel strip serving as a lithium battery shell material and a preparation method thereof. The preparation method comprises the following procedures of: (1) pretreating a base material; (2) continuously electrodepositing a nickel-cobalt alloy plating layer on the pre-treated base material; (3) carrying out diffusion annealing treatment on the nickel-cobalt alloy plating layer under a protective atmosphere like high-purity nitrogen; (4) plating a nickel-cobalt alloy plating layer on the metal subjected to the diffusion annealing treatment again; and (5) rolling the plated nickel-cobalt alloy plating layer in a cold manner. The cobalt containing nickel plated steel strip disclosed by the invention is prepared by a special process of tightly combining the nickel-cobalt alloy plating layer and a low-carbon steel strip and then electroplating the nickel-cobalt alloy plating layer and the low-carbon steel strip, shows better corrosion resistance and can be used for shell materials of primary batteries, secondary batteries and lithium ion power cells such as 18650, 26650 and the like.

The invention belongs to the technical field of chemical tinning, in particular to an electrolytic tinning annexing agent. The electrolytic tinning annexing agent is formed by matching of following ingredients. The ingredients comprise 25-55 g/l of tin methanesulfonate, 90-140 g/l of methanesulfonic acid, 15-20 g/l of a stabilizing agent, 10-15 g/l of brightening agent, 15-25 g/l of polyacrylamide and aluminium polychlorid, 3-8 g/l of a rare earth annexing agent and the balance deionized water. The electrolytic tinning annexing agent has the advantages that the plating solution property is stable, a plating solution can be maintained to be clear and free of turbidity, a cladding layer crystal is refining, the brightness area is large, the evenness is good, lead does not exist, and the environment is further protected.

The invention relates to the technical field of surface treatment technologies of metal materials and discloses a general phosphating agent which is suitable for surface treatment of metal materials such as steel, aluminium, zinc and the like. The general phosphating agent contains the following components: zinc oxide, nicdel nitrate, manganese carbonate, phosphoric acid, nitric acid, fluosilicic acid, an additive and water. The invention aims to provide the general phosphating agent with good versatility. The general phosphating agent can be widely used in surface treatment of metal such as steel, aluminium, zinc and the like and can be used to raise anticorrosion performance of metal surface.

This invention relates to polyester/mesoporous molecular sieve composite material and its preparing method. Using mesoporous molecular sieve fine particles with definite grain size, aperture and acid-base value, after drying, mixing with liquid polyesters, esterifying to obtain esterified mixed product, during reaction combining with ultrasonic dispersion technology to make monomer and molecular sieve fine partticles mix uniformly, by precondensation and endcondensation under constant temperature and pressure esterified product to obtain a product, by granulating and drying to be agglomerates. During prparation, under vacuum and ultrasonic action, monomer can enter to particle aperture, by in-situ polymerization, particles inside and outside is coated with polymer, bonding polyester and molecular sieve interface well to form polyester/mesoporous molecular sieve composite material with inorganic-organic interpenetrating network structure. The material properties, such as melt crystallization temperature, crystallinity, glass-transition temperature and bending strength, storage modulus elasticity modulus are obviously improved.

The invention provides an automobile air conditioner compressor planetary plate. The planetary plate is prepared from an aluminum alloy which comprises the following components in percentage by weight: 8%-9% of Si, 1%-1.5% of Cu, 0.4%-0.7% of Mg, 0.1%-0.3% of C, 0.8%-1.5% of Ni, 0-0.1% of Mn, 0-0.2% of Fe, 0-0.1% of Zn, 0.3%-0.4% of Ti, 0.1%-0.2% of RE and the balance of Al. The invention also provides a production method of the automobile air conditioner compressor planetary plate. The elements in the aluminum alloy for the planetary plate are selected and controlled, a forging technique is further used instead of the casting technique, the pretreatment before forging and after-treatment after forging are optimized, and the technological parameters in each treatment process are optimized, thereby enhancing the strength of the planetary plate and further improving the service performance and service life of the planetary plate.

The invention discloses an NdFeB zinc series phosphating solution. The NdFeB zinc series phosphating solution is composed of Zn2+, PO43-, NO3-, F-, an accelerant and Ni2+, wherein the amount-of-substance concentration ratio of Zn2+ to PO43- to NO3- to F- to the accelerant is (54-74) :(163-183) :(126-146) :(50-70) :(3-5), the concentration of the accelerant ranges from 0.1 g/L to 1.3 g/L, and the concentration of Ni2+ ranges from 0.01 g/L to 0.2 g/L. The phosphating solution and water are prepared into a work solution according to the ratio of 1:10. According to work parameters, the free acidity ranges from 5% to 8%, the total acidity ranges from 30% to 40%, the phosphating temperature ranges from 50 DEG C to 55 DEG C, the phosphating time ranges from 10 minutes to 15 minutes, NdFeB is treated to generate a light grey or grey phosphating film, the soaking time of 3% neutral saline water is three hours or above, the cross-cut test of a paint film obtained after cathode electrophoresis is the degree 0, and the time of the neutral salt spray test of the paint film obtained after cathode electrophoresis is 550 hours or above. The phosphating solution is high in film-forming thickness and fine in film layer crystallization on treated workpieces, the surface is smooth and dense, the corrosion resistance is excellent, the solution is stable, less sediment is generated, and the time of the salt spray test is longer; and meanwhile no organic complexing agent is included in the formula, the enterprise cost is reduced, and the environment is protected.

The invention relates to an early strength agent using nanometer lithium slag for sulphoaluminate cement and a preparation method thereof. The early strength agent is prepared from the following raw materials and components in percentage by mass: 20 to 30% of lithium slag, 5 to 9% of dispersant, 1 to 5% of stabilizer, and 60 to 70% of deionized water. The preparation method comprises the followingsteps of adding the lithium slag, the dispersant, the stabilizer and the deionized water into a planetary ball mill according to a ratio, adding zirconium oxide grinding balls, and performing ball grinding, so as to obtain the early strength agent using the nanometer lithium slag for sulphoaluminate cement, wherein the medium particle size is 200 to 400nm. The early strength agent using the nanometer lithium slag is doped into the sulphoaluminate cement according to the doping amount of 0.5 to 4.0%, the 7d strength of the mortar of the sulphoaluminate cement can be increased by 110 to 140%, and the later strength can avoid shrinkage. The preparation method has the advantages that the technology process is simple, and the technology parameters are easy to control; the used lithium slag isindustrial waste, so that the cost is low, and the preparation method is suitable for environment protection.

The invention relates to the technical field of metal corrosion protection and surface treatment, in particular to a cyanide-free alkaline cuprous plating additive. The additive comprises 50-200 partsof complexing agent, 0.1-20 parts of stabilizer, 0.01-0.5 part of brightener, 0.1-5 parts of leveling agent, 10-20 parts of NaOH, 5-20 parts of Na2CO3 and 15-50 parts of cuprous compound. The additive does not contain cyanide and organic phosphonate, is suitable for cyanide-free alkaline copper plating electroplating solution taking cuprous salt as main salt, and effectively solves the problem that traditional cyanide-free alkaline copper plating generates a loose plating layer with poor binding force due to displacement reaction; meanwhile, a certain activation effect can be generated on a steel substrate, a copper coating with good binding force can be obtained on the steel substrate, and the additive is safe, efficient and environmentally friendly.

The invention relates to the field of welding wire manufacturing, in particular to a preparation method of an aluminum and aluminum alloy welding wire electrochemically plated with a Zn+Cu/Re composite coating and applied to robot welding. A pure aluminum or aluminum alloy wire rod is used as the matrix. Pretreatment, electrochemical plating of the Zn+Cu/Re composite coating and post-treatment areconducted on the surface. The electrochemically plated Zn+Cu/Re composite coating has the functions of reducing welding smoke, improving the porosity resistance of the welding wire and improving solid lubrication and meanwhile fills up pits in the surface of the welding wire matrix, and the electric conductivity and surface quality of the welding wire are improved; the bonding force and strengthof the Zn+Cu/Re composite coating are high, the aluminum or copper peeling phenomenon is avoided, the Zn+Cu/Re composite coating is high in compactness, good in rust resistance and resistant to wear,Zn can reduce welding smoke and splashes, and Re can refine plating layer crystals and reduce the void ratio; and meanwhile, molten bath stirring is enhanced, a molten bath is purified, crystals are refined, pores on the surface and on the inner portion of a welding joint are thoroughly eradicated, and the porosity resistance of the welding wire is improved.

The invention discloses a water-soluble 3D-printing supporting wax. The water-soluble 3D-printing supporting wax comprises the following components in parts by weight: 20-90 parts of polyethylene glycol wax, 5-50 parts of a water-soluble tackifier, 0.1-1 part of a nucleating agent, and 0.1-0.5 part of an antioxidant. The invention further provides a preparation method of the supporting wax. The supporting wax has the characteristics of being fast in dissolving speed in water, high in printing accuracy, simple in removing processes, safe, environmentally friendly, and suitable for massive application; meanwhile, a printing wax die cannot be damaged, so that the wax die printing accuracy and the casting accuracy are improved.

The invention provides a rare earth aluminum alloy wire high in electrical conductivity, corrosion resistance, wear resistance and toughness, and a manufacturing method of manufacturing the rare earth aluminum alloy wire. The rare earth aluminum alloy material comprises silver, silicon, iron, zinc, gallium, a rare earth element, aluminum and inevitable elements. The contents of all the above elements are as follows: 0.05-0.5 wt% of Ag, 0.01-0.1 wt% of Si, 0.01-0.2 wt% of Fe, 0.01-0.1 wt% of Zn, 0.01-0.03 wt% of Ga, 0.05-0.25 wt% of rare earth element, and the balance of aluminum and inevitable impurities. According to the technical scheme of the method for manufacturing the rare earth aluminum alloy wire, firstly, an aluminum ingot is melted. Secondly, corresponding alloying elements are added into the molten aluminum liquid. Thirdly, through the continuous-casting, continuous-rolling and drawing process, an aluminum alloy wire is finally manufactured. The manufactured aluminum alloy wire is excellent in electrical conductivity, and the conductivity of the aluminum alloy wire can reach or exceed 101. 2% IACS. Meanwhile, the manufactured aluminum alloy wire is excellent in flexibility, corrosion resistance and wear resistance.

The invention discloses aluminum alloy profile for a firefighting truck and a preparation method thereof, and relates to the technical field of aluminum alloy. The aluminum alloy profile comprises thefollowing components of, by mass, 0.1-0.3% of Cu, 0.3-0.5% of Si, 0.25-0.4% of Fe, 0.1-0.2% of Cr, 0.55-0.85% of Mg, 0.3-0.5% of Mn, 0.1-0.3% of Zn, 0.2-0.4% of Ti, 0.04-0.08% of Li, 0.12-0.18% of Ni, 0.06-0.12% of Y, 0.04-0.08% of Ca and the balance Al. According to the aluminum alloy profile for the firefighting truck and the preparation method thereof, all the elements of the aluminum alloy profile and the content of the elements are reasonably optimized, the preparation technology is optimized, the prepared aluminum alloy profile has excellent mechanical properties and is high in strengthand hardness, good in ductility and excellent in impact resistance and fatigue resistance, and cracking and other phenomena are not prone to occurring when firefighting truck body parts are subjectedto punch forming.

The invention relates to a 3D printing wax wire applied to lost foam casting and a preparation method thereof. The material is prepared from 10 to 50Kg of hard wax, 10 to 50Kg of soft wax, 5 to 30Kg of tackifier, 0.1 to 1Kg of nucleating agent, 1 to 20Kg of polyolefin, 0.1 to 0.5Kg of antioxidant and 0 to 1Kg of toner. The preparation method comprises the following specific steps: weighing all ingredient raw materials according to ingredient proportions; mechanically and evenly mixing all the ingredients; then adding all the evenly-mixed ingredient raw materials into an extruding machine; drawing under 50 DEG C to 120 DEG C, cooling, air drying, diameter measuring, pulling, storing wires and winding to obtain the 3D printing wax wire with the uniform wire diameter. The material has the advantages of good strength, no easiness in being broken, good wax lost performance, small shrinkage, large-size printing, good antioxidant performance, recyclable and the like, and the material can replace traditional wax molds to be widely applied to the industrial field of lost foam casting.

The invention discloses a corrosion-resistant and wear-resistant high strength electrophoretic aluminum profile and a preparation process thereof and belongs to the field of aluminum profile preparation. The corrosion-resistant and wear-resistant high strength electrophoretic aluminum profile is prepared from the following raw materials in percent by weight: 0.8-1.2% of Mg, 0.4-0.6% of Si, 0.2-0.4% of Ti, 0.22-0.3% of Fe, 0.06-0.1% of Cu, 0.08-0.12% of Zn, 0.06-0.08% of Cr, 0.12-0.18% of Mo and the balance of Al and inevitable impurities. The preparation process is simple and effective and convenient and rapid in process operation. By controlling the contents of Mg, Si, Fe, Cu and Zn reasonably, strengthening phases such as Al2Cu, Al2CuMg, Mg2Si, MgZn2 and the like are formed in the electrophoretic aluminum profile to strengthen the synergistic effect, refine crystals and improve grain distribution, so that performance, such as wear resistance and corrosion resistance, of the electrophoretic aluminum profile is improved. By matching Si, Ti, Fe, Cr and Mo, the grains are refined, the cast structure and the weld joint structure are refined, the recrystallization temperature is increased, the thermal stability of a material is improved, the intergranular corrosion is avoided, and the corrosion performance of the electrophoretic aluminum profile is improved.

The invention discloses transparent LLDPE (linear low density polyethylene) thin-film resin and a thin film prepared from the same. The resin is prepared from ethylene and 1-butene through copolymerization, the structure of a resin compound is shown in the description, wherein n1 is larger than or equal to 20 and smaller than or equal to 25, n2 is larger than or equal to 25 and smaller than or equal to 250, n3 is larger than or equal to 1 and smaller than or equal to 20, R1 is -CH2CH3, R2 is -(CH2)mCH3, and m is larger than or equal to 100. The thin-film resin has a structure with broad molecular weight distribution, unique short branched chains and a few long branched chains, and by means of the structure, shear sensitivity of a product and crystallization morphology can be improved, so that the resin shows better transparency and machinability, has good overall performance, can be used in the thin-film fields of packaging films, wrapping films and the like with special requirements and is practical and functional thin-film resin.

The invention discloses a steel rim vehicle wheel surface phosphating treatment method and relates to the technical field of steel treatment. The method comprises: (1) grinding, (2) cleaning, (3) plasma treatment and (4) phosphating treatment. The method can well protect the steel rim vehicle wheel surface, improve the film forming stability, greatly improve the compactness and uniformity of the phosphated film, realize high phosphated film adhesion, improve the corrosion resistance and wear resistance of the surface of the steel rim vehicle wheel surface, realize high phosphated film purity,facilitate precipitate removal, shorten the conventional high-temperature surface phosphating treatment time, realize fast phosphating treatment at the normal temperature, prevent heating, solve the problem that the conventional high-temperature phosphating treatment method easily causes phosphated film impurities and precipitates difficult to remove, and improve the phosphating efficiency.

The invention relates to the technical field of polylactic acid modification, and discloses a transparent heat-resistant fully-degradable component polylactic acid composite material and a preparation method thereof. The composite material comprises polylactic acid and nucleating masterbatch; the nucleating masterbatch comprises high-molecular-weight polylactic acid and a beta-nucleating agent; the composite material comprises the following components in parts by weight: 100 parts of polylactic acid, 3-15 parts of high-molecular-weight polylactic acid and 1-10 parts of the beta-nucleating agent. The invention also discloses a preparation method of the composite material. According to the polylactic acid composite material, the adopted process is simple and easy to operate, and after the transparency-heat resistance is optimized, the polylactic acid composite material can be widely applied to high-performance PLA-based composite materials and manufacturing of important industrial products including medical materials, high-temperature sterilization, degradable packaging and the like.

The invention discloses an efficient plating solution additive. The efficient plating solution additive contains the following components per kilogram: 30 to 60 g of tetraethylenepentamine, 1 to 5 g of pyridinium, 20 to 30 g of methanesulfonic acid, 0.1 to 1 g of vanillin, 1 to 3 g of saccharin sodium, 20 to 30 g of polyacrylamide, 10 to 20 g of diethyl hexyl sodium sulfate, 1 to 5 g of polyoxy alkyl phenol sodium sulfate, 20 to 30 g of lauryl sodium sulfate, 15 to 25 g of polymeric aluminium, 10 to 20 g of hydroxy sodium sulfonate, 10 to 20 g of polyoxyethylene, 10 to 20 g of trichloride ammonium and deionized water as the rest.