11results about How to "Fully transformed" patented technology

The invention relates to a hot-rolled wire rod for a 2060MPa bridge cable and a manufacturing method of the hot-rolled wire rod, after C-Si-Mn-Cr-V-Nb component is rolled and spun into a wire rod, the wire rod is subjected to online molten salt strong isothermal treatment, so that the wire rod is cooled at a cooling speed of greater than or equal to 34 DEG C / s, and enters a sorbite phase region from an austenite state to form a structure mainly comprising fine lamellar spacing sorbite, and isothermal treatment is carried out; and finally, through roller way slow cooling, the hot-rolled wire rod with a microscopic structure mainly comprising tempered sorbite and the balance being a mixed structure composed of ferrite and microspheroidized carbide is prepared, a deteriorated structure influencing the performance of a wire rod finished product in the production process can be effectively controlled, stable production is achieved, and the strength and plasticity matching of the wire rod is improved. The tensile strength is 1440-1490 MPa, the percentage reduction of area is 42%-46%, and the method is suitable for efficient and stable production and manufacturing of the 2060 MPa bridge cable.

The invention discloses a heat treatment process for relieving large-size carbides of a 17CrNiMo6 large-modulus gear. The heat treatment process comprises the following steps: a) first-time heating: heating a workpiece to a carburizing temperature in a gradient heating manner; b) heat-preservation carburizing: carburizing the workpiece by adopting multi-section pulse carbon potential; c) cooling after carburization: carrying out furnace gradient cooling on the workpiece to 660 + / -5 DEG C; d) heat preservation transformation: the workpiece is subjected to heat preservation at 660 + / -5 DEG C for a period of time, so that dispersed cementite precipitation and pearlite transformation are fully carried out; e) heating and preserving heat for the second time: heating the workpiece to 820 + / -5 DEG C, and preserving heat for austenite transformation; and f) quenching. Therefore, large-size carbides in a gear structure after heat treatment can be reduced, martensite needles in a quenched workpiece are effectively promoted to be smaller and thinner, the content of retained austenite is low, the metallographic structure of the workpiece is guaranteed, the use performance of parts is met, and the heat treatment method is particularly suitable for heat treatment of large-modulus gears.

The invention relates to a low-carbon high-plasticity hot-rolled wire rod for a 1860MPa-grade stranded wire and a manufacturing method of the low-carbon high-plasticity hot-rolled wire rod. C-Si-Mn-Cr components are subjected to hot-rolled spinning to form a wire rod, and then the wire rod is subjected to online molten salt isothermal treatment, so that the wire rod is cooled at a cooling speed of greater than or equal to 34 DEG C / s and enters a sorbite phase region from an austenite state to form a structure taking sorbite as a main part, and isothermal tempering is carried out, so that the low-carbon high-plasticity hot-rolled wire rod is obtained. And finally, slow cooling is conducted through a roller way, the hot-rolled wire rod with the microstructure comprising not less than 89% of tempered sorbite and the balance of tempered ferrite and microspheroidized carbide is prepared, the carbon content can be reduced, the material cost can be further reduced, the export tax refund requirement can be met, the abnormal structure precipitation risk is effectively reduced, and the structure uniformity is improved. According to the method, the strength of the steel wire rod is matched with the high plasticity, the tensile strength is 1190-1240 MPa, the percentage reduction of area is 49%-54%, and the yield and the use performance of the 1860 MPa grade steel strand can be improved.

The application provides application of phosphorus ylide organophosphine as Lewis base in catalysis of polar vinyl monomer polymerization, and belongs to the technical field of polymer synthesis. The application utilizes phosphorus ylide organophosphine as Lewis base, and through Lewis base and Lewis acid synergistic catalysis of polar vinyl monomer polymerization under the cooperation of Lewis acid, realizes active controllable polymerization of polar vinyl monomer by changing steric hindrance and electronic effect of Lewis acid and Lewis base, and can realize active controllable homopolymerization and copolymerization (random copolymerization and block copolymerization) of different polar vinyl monomers. The molecular weight of the obtained polymer increases with the increase of the monomer to catalyst ratio, so that the system can realize the molecular weight of the polymer reaching more than 10 6 g / mol, the measured value of the molecular weight of the obtained polymer is basically consistent with the theoretical value, the monomer conversion rate is 100%, and the initiation efficiency is close to 100%.

The application relates to the technical field of wire rod production, in particular to a production method of high-efficiency and energy-saving alloy tool steel wire rod, and production steps of the method comprise the following steps: (1) cogging; (2) heating; (3) rolling: adopting a finishing rolling unit to roll, the temperature of an intermediate blank entering the finishing rolling unit is 900-910 DEG C, the temperature of the intermediate blank leaving the finishing rolling unit is 900-920 DEG C, so that the difference between the temperature of the intermediate blank leaving the finishing rolling unit and the temperature of the intermediate blank entering the finishing rolling unit is less than or equal to 20 DEG C; (4) cooling; (5) packing, the temperature of entering and leaving the finishing rolling unit is controlled by the cooling water pressure between the finishing rolling unit racks, high-strain-rate large deformation rolling in a non-recrystallization zone increases the dislocation and substructure density in supercooled austenite, and the produced deformation storage energy.

The application discloses a preparation method of chiral sulfonamide synthesized by nickel-catalyzed asymmetric reduction and a chiral sulfonamide compound. The preparation method comprises the following steps: using a proton as a hydrogen source, and under the action of a chiral nickel catalyst and a boron reagent, chiral sulfonamides with various substituents can be obtained, and the enantiomeric excess can reach 98%. The application has the advantages of simple and practical operation, high yield, high enantioselectivity, environmental friendliness, greenness, mild reaction conditions and potential practical application value.

The invention relates to a potassium ion competitive blocker intermediate and a preparation method thereof. The first aspect of the invention provides a preparation method of a potassium ion competitive blocker compound in a formula 1, and the reaction route is shown as follows: # imgabs0 # R1 is H or F; r < 2 > is F, H,-O (CH2) 3OCH3; r3 and R5 are independently selected from H and OCH3; r4 is C or N; the method comprises the following steps: step 4, obtaining a compound shown in a formula 1 from a compound shown in a formula 2 under the action of a borane-amine complex and titanium tetrachloride. According to the method for preparing the potassium ion competitive blocker, one step of oxidation can be reduced, material loss is reduced, cost is reduced, aftertreatment is simplified, the yield of each step reaches 88% or above, and the purity reaches 99% or above. The process for preparing the potassium ion competitive blocker compound in the formula 1 is simpler and more convenient, and is suitable for industrial production.

The invention discloses a method for asymmetric hydrogenation of a pyrazolopyrimidine multi-nitrogen aromatic compound under the catalysis of manganese, and belongs to the technical field of asymmetric catalytic synthesis. Manganese and a chiral hydroxypyridine oxazoline ligand are used as catalysts, under the alkaline condition, a pyrazolopyrimidine multi-nitrogen aromatic compound and hydrogen are subjected to asymmetric hydrogenation in a solvent, and the chiral pyrazolotetrahydropyrimidine compound is obtained. According to the method, asymmetric hydrogenation of the pyrazolopyrimidine multi-nitrogen aromatic compound can be realized, the pyrazoloectoine compound with optical purity is obtained at high yield, and the enantiomeric excess can reach 97%. The method has the advantages of high enantioselectivity, simple and easy operation, easy preparation of the catalyst, mild reaction conditions, low energy consumption, environmental friendliness and good yield.

The present invention relates to a heat treatment method for improving the anisotropy of a high-strength cold-rolled steel plate and a high-strength cold-rolled steel plate, wherein the final rolling temperature is controlled to be not less than Ar3+50°C in hot rolling, the cold rolling reduction ratio is controlled to be not less than 40% in cold rolling, and a uniform annealing step and a two-stage austenite isothermal quenching step are provided after cold rolling. The high-strength cold-rolled steel plate is also provided, and the yield strength of the steel plate finally obtained is above 650Mpa, and the structure is a fine and uniform bainite structure with a small amount of tempered martensite particles distributed therein, and the bending anisotropy index Ibend is less than 0.25. The heat treatment method of the present invention is suitable for improving the bending anisotropy of a variety of high-strength cold-rolled steel plates with a yield strength of more than 650MPa, and the composition of the high-strength cold-rolled steel plate suitable for reducing the bending anisotropy by the process of the present invention is limited to obtain a preferred low bending anisotropy effect.

The application discloses a method for synthesizing chiral N-(1,2-diphenylethyl)-4-methylbenzenesulfonamide by using palladium and a chiral biphosphine ligand as a catalytic system, borohydride as a hydrogen source, and cis-2,3-diphenyl-1-toluenesulfonyl aziridine derivatives as a substrate, and assembles chiral N-(1,2-diphenylethyl)-4-methylbenzenesulfonamide derivatives by asymmetric hydrogenolysis. The method is simple and practical, raw materials are easy to obtain, has high enantioselectivity, good yield, simple operation, and the like, and has the advantages of commercially available catalysts.

The invention discloses a preparation method of a centrifugal composite roller with an ultra-thick working layer, which belongs to the technical field of roller preparation and comprises the following steps: step A, taking waste steel, ferronickel, ferrovanadium, ferrochromium, ferromolybdenum, ferrotungsten and electrode powder as raw materials, and smelting outer-layer molten iron and core molten iron by adopting a power frequency or intermediate frequency furnace; b, after the smelting components reach the standard, the outer-layer molten iron and the core molten iron are heated, discharged out of the furnace and poured, and step inoculation is adopted during outer-layer pouring; c, after pouring is completed, a box is opened in a cold mode, and rough machining is conducted after the box is opened in the cold Step D, performing heat treatment on the product after the rough machining is finished; and E, after heat treatment is finished, finish machining is conducted till a finished product is obtained. According to the method, the problem of difference of the structure consistency in the working layer is solved, the stable working layer structure is obtained on the basis of the super-thick working layer, the structure uniformity of the whole working layer is achieved, and the stability of the working layer is guaranteed.