52results about How to "High punchability" patented technology

The invention is to provide a sheet for cards which is excellent in terms of all of heat resistance, weatherability, rigidity, punchability, and embossability and which employs a plant-derived resin, and to provide a card. The invention relates to a sheet for cards which has a layer constituted of a resin composition (X) containing, as a main component, a polycarbonate resin (A) that contains structural units (a) derived from a dihydroxy compound represented by the following formula (1) and that has a glass transition temperature lower than 130° C.

The invention relates to an aqueous environment-friendly insulation coating of anti-settling electric steel and a preparation method thereof. The insulation coating is formulated from the following components by mass percent: 20-60% of aluminium dihydrogen phosphate, 0.5-5% of silica solution, 1-10% of phosphoric acid, 0.3-2% of nitric acid, 1-5% of magnesium oxide, 0.3-5.5% of rare earth-salt blended solution, 0.5-5.5% of silane coupling agents, 3-20% of anti-settling additives, and the balance of solvent water. In the invention, conventional roller painting technology is adopted for coatingand then a film can be made by proper high-temperature solidification. By multiple actions of physical covering, chemical passivation, phosphorization and the like, a surface insulation coating of a cold rolling electric steel plate without orientation has the advantages of good adhesiveness, high insulativity (namely resistance and puncture voltage between high-rises), high corrosion resistance,high temperature resistance and the like, as well as environmental protection without chrome or harmful ions. The insulation coating is widely applicable to the surface coating of the cold rolling electric steel plate without orientation, has a better anti-settling property, better dispersity and a better levelling property, leads coating operation on site to be more convenient and faster, and can effectively avoid the segregation of paint ingredients and the fluctuation of coating performances.

The invention discloses a semi-inorganic environment-friendly insulating paint for non-oriented silicon steel and a coating preparation method thereof, and belongs to the technical field of non-oriented silicon steel paint. The semi-inorganic environment-protecting insulating paint for the non-oriented silicon steel is prepared by the following components by mass percent: 5-40% of aluminum dihydrogen phosphate, 0.5-10% of manganese dihydrogen phosphate, 1-12% of zinc dihydrogen phosphate, 0.5-1.5% of zinc oxide, 0.1-1% of magnesium oxide, 1.0-7% of boric acid, 5.0-27% of resin, 2.0-6.0% of organic solvent, 0.1-0.8% of other auxiliaries, and the balance of water. The paint is an environment-friendly paint free from chromium; at the same time, the coating is uniform in brightness, better in corrosion resistance than the ordinary phosphate coating, and good in insulation, adhesiveness, punching, weldability, heat resistance and corrosion resistance. In addition, the source of the semi-inorganic environment-friendly insulating paint for the non-oriented silicon steel is rich, so that the production cost is low, and the paint can be widely applied.

The invention discloses a cold-rolled non-oriented electrical steel 35WD1900 and a production method thereof. The cold-rolled non-oriented electrical steel 35WD1900 comprises the following chemical components by weight: <= 0.005% of C, 2.0-2.5% of Si, 0.2-0.4% of Mn, 0.08-0.12% of P, <= 0.008% of S, 0.3-0.5% of Al, 0.004-0.006% of B and the balance of Fe and unavoidable impurities. The productionmethod includes the following steps: (1) a steel plate is subjected to continuous casting to form a continuously-cast billet, which is heated in a heating furnace after being cooled, and then subjected to hot rolling; (2) the hot-rolled billet is subjected to acid pickling, first cold rolling, decarburizing annealing and second cold rolling; and (3) after being subjected to the second cold rolling, the electrical steel is subjected to secondary annealing and coating to obtain the product. The performance of the cold-rolled non-oriented electrical steel 35WD1900 of the invention can meet the requirements of the high-strength non-oriented electrical steel used in the drive motors of new energy automobiles; and the welding performance and the stamping performance are good.

The invention discloses an annealing method of external layer-oxidized cold-rolled non-oriented electrical steel. The circulation in a circulating gas cooler of a continuous annealing furnace is nitrogen circulation, and the oxygen content is 600-1000 ppm; the plate temperature when the steel plate exits the circulating cooler is 200-450 DEG C; the dew point of the circulating cooler is 40 to -40 DEG C; the dew point of a soaking pit furnace is 60 to -60 DEG C. The product with surface oxidation has good insulating properties and punching performance; the insulating layer thickness is decreased to realize the purpose of saving coating solution; the short-flow production of silicon steel with an oxide layer on the surface is realized; and bluing silicon steel can be produced directly.

The invention relates to non-oriented electrical steel for an efficient motor. The non-oriented electrical steel for the efficient motor is prepared from the chemical components in percentage by weight: less than or equal to 0.0030% of C, 1.9-2.1% of Si, 0.28-0.32% of Mn, 0.10-0.60% of Al, 0.01-0.06% of P, less than or equal to 0.0050% of S, 0.10-0.30% of Cu, 0.02-0.05% of Sb and less than or equal to 0.0030% of N. The production process comprises the following steps: smelting; cogging; repeatedly forging to obtain square billets; heating; hot-rolling; normalizing; pickling; cold-rolling; and thermally heating. By controlling the total weight of main alloy elements (Si+Al+Mn) and auxiliary elements (Cu+P+Sb), favorable effects of elements in physical metallurgy are fully exerted. By researching the composite effect of elements (Cu+P+Sb) on silicon steel organization structure and magnetism, partial (Si+Al) is replaced by (Cu+P). On the one hand, the inflection time of a normalized plate can be improved and on the other hand, the punching property of a finished plate is improved. The non-oriented electrical steel for the efficient motor excellent in magnetic property and good in punching effect is developed.

The invention provides a 10KV oil-immersed transformer. The 10KV oil-immersed transformer comprises an oil tank, an iron core, windings, insulating sleeves and an oil temperature measuring device. Transformer oil for cooling and insulating the windings is arranged in the oil tank. A high-permeability crystal orientation cold rolling silicon sheet is adopted in the iron core. The iron core is a core-type iron core. The windings are each of a multilayer cylinder type structure. The oil tank is provided with a conservator for storing and replenishing oil for the oil tank. The conservator is a capsule type conservator. The oil temperature measuring device is arranged at the top of the oil tank. The oil tank is provided with a pressure relief valve. The side wall of the oil tank is a corrugated wall. Dust is sprayed to the surface of the oil tank, and a film is painted to the surface of the oil tank so that an outer protective layer can be formed. The 10KV oil-immersed transformer is low in cost, easy to maintain, good in heat dissipation, high in overload capacity and wide in adaptive environment. It is guaranteed that oil does not need to be replaced when the oil-immersed transformer normally runs, the maintenance cost of the transformer is greatly reduced, and meanwhile the service life of the transformer is prolonged.

The invention discloses a transformer silicon steel sheet and a preparation method thereof and relates to the technical field of transformer silicon steel sheet manufacturing. The silicon steel sheetcomprises the following components: C, Si, Mn, Cr, Ni, Al, Mo, V, Co, B, S, P, N and Fe. The preparation method of the transformer silicon steel sheet comprises the following steps: melting industrialraw materials, casting, annealing, performing acid pickling, and performing surface coating, so as to obtain the transformer silicon steel sheet. The transformer silicon steel sheet disclosed by theinvention is excellent in mechanical property, low in iron loss, high in magnetic induction strength, good in insulating property and long in service life.

The invention provides a vertical drying and curing process for a non-oriented silicon steel low-temperature chromium-free environment-friendly insulating coating. The process comprises the following steps that after cold-rolled non-oriented silicon steel is annealed in a galvanizing unit, the cold-rolled non-oriented silicon steel is coated with the low-temperature chromium-free environment-friendly insulating coating by using a coating machine, and drying and curing are conducted by using a vertical drying furnace to produce a cold-rolled non-oriented silicon steel product, specifically, the thickness of the low-temperature chromium-free environment-friendly insulating coating is 0.8-1.0 micron; the furnace temperature of each section of the vertical drying furnace is as follows that the furnace temperature of a first heating section is 420-450 DEG C, the furnace temperature of a second heating section is 460-490 DEG C, the furnace temperature of a third heating section is 500-530 DEG C, the outlet plate temperature of the third heating section is 200-240 DEG C, and the outlet plate temperature of a cooling section is 60-65 DEG C; and the heating time of each section of the vertical drying furnace is as follows that the heating time of the first heating section, the second heating section and the third heating section are 3.5-4 seconds correspondingly. By the adoption of the process, it can be guaranteed that a steel belt coating is uniform, the coating of a final product has excellent insulativity, corrosion resistance, adhesiveness, punching performance, weldability and heat resistance, the requirements of downstream procedures are met, the product percent of pass can be further increased, waste products are reduced, and smooth production is guaranteed.