6results about How to "High material strength" patented technology

According to the effluent pump for the alkylation device, a gap between a throat shaft sleeve and a throat lining, a gap between a first-stage shell wear ring and a first-stage impeller wear ring, a gap between an interstage shaft sleeve and an interstage lining and a gap between a balance shaft sleeve and a balance sleeve are arranged; and gaps between the secondary shell wear ring and the secondary impeller wear ring are modified, so that heat generated by an overflowing part can be dissipated in an accelerated manner, the situation that equipment is damaged due to the fact that a rotating part and the wear rings are heated to expand and stick to each other due to short-time flow insufficiency is effectively avoided, and meanwhile, the service life of the equipment is prolonged. And the situation that equipment is damaged due to local overheating caused by partial flow channel blockage due to too small interstage gaps of large-particle impurities carried in a medium can be avoided.

This invention relates to a method for online crosslinking of hollow bodies using ultraviolet light through blow molding. The molding method includes the following steps: 1) Two preforms are cut into blanks, which are then positioned between two molds and an intermediate mold; an ultraviolet light emitting device is installed on the intermediate mold; 2) The molds are closed, and air is blown into the intermediate mold to preform the preforms; 3) After preforming, ultraviolet light irradiation and fixing of the internal components are performed; 4) The molds are closed, and blown needles on the molds begin blowing air, fusing the two preformed half-shells together along the parting line to form a hollow body, which is then cooled and solidified; 5) The molds are opened, and the product is removed. This method addresses the problems of low strength in plastic fuel tanks, which, in the field of high-pressure fuel tanks, cannot withstand the high fuel vapor pressure generated by temperature differences and prolonged engine inactivity, leading to large deformation of the fuel tank, as well as the high cost of existing plastic high-pressure fuel tank solutions.

The invention discloses a high-temperature fire-resistant heat-insulation carbon fiber composite material which comprises the following components in parts by weight: 35-50 parts of wollastonite-feldspar composite powder, 25-35 parts of modified porous mullite aggregate, 12-20 parts of calcium aluminate cement, 2-8 parts of modified short carbon fibers, 1.5-2.5 parts of sodium dodecyl benzene sulfonate and 1-2 parts of sodium tripolyphosphate. The preparation method comprises the following steps: S1, weighing the wollastonite-feldspar composite powder, the modified porous mullite aggregate, the calcium aluminate cement and the modified short carbon fibers in proportion, and carrying out dry mixing; s2, adding water into sodium dodecyl benzene sulfonate and sodium tripolyphosphate, and stirring to obtain an auxiliary agent aqueous solution; s3, adding the auxiliary agent aqueous solution into the dry powder mixture, and stirring; s4, transferring the slurry into a mold for hydraulic forming; s5, the formed blank is subjected to curing, demolding, drying, high-temperature sintering and cooling, and the high-temperature fire-resistant heat-insulation carbon fiber composite material is obtained. The fire-resistant and heat-insulating carbon fiber composite material produced by the invention can improve the high temperature resistance and compression strength.

The application discloses a titanium gypsum solidification material and an environmental risk assessment method thereof. The titanium gypsum solidification material is obtained by mixing titanium gypsum produced in a titanium dioxide production process and red mud produced in an aluminum production process according to a weight ratio of 1:4-8 to form a titanium gypsum-red mud composite base material, and then performing reinforcing treatment on the titanium gypsum-red mud composite base material to obtain titanium gypsum-red mud composite granular material, and then mixing the titanium gypsum-red mud composite granular material with cement according to a weight ratio of 3:1-5. The titanium gypsum solidification material can realize waste resource utilization of the titanium gypsum and the red mud, realizes waste treatment by waste, and solves the problem of poor concrete compatibility of the titanium gypsum as cement ingredients, and provides a new high-strength material for roadbed material selection.

This invention discloses a polyester material, a heat-shrinkable film, its preparation method, and its applications. The raw materials for preparing the polyester material include a diacid, a diol, a chain extender, a stabilizer, and a catalyst; wherein the diacid comprises: 90 mol%~95 mol% polyterephthalic acid and 5 mol%~10 mol% isophthalic acid; the diol comprises: 65 mol%~78 mol% ethylene glycol, 18 mol%~28 mol% 1,4-cyclohexanediol, and 4 mol%~12 mol% diethylene glycol; the chain extender is 2,2'-(1,3-phenylene)-dioxazoline, added in an amount of 0.2%~0.8% of the total mass of the diol and the diacid; the molar ratio of carboxyl groups to hydroxyl groups in the diacid and the diol is 1:1~1.05. The polyester material of this invention possesses excellent transparency, shrinkage rate, and strength, and has a low initial shrinkage temperature, making it particularly suitable for applications such as heat-shrinkable films. This invention also provides a heat-shrinkable film, as well as the polyester material, a method for preparing the heat-shrinkable film, and their applications.

The application discloses a kind of 1.2GPa grade yield strength low-carbon 5Mn medium manganese steel and preparation method thereof, belong to the technical field of changing ferrous metal physical structure.The application uses critical zone annealing, secondary cold rolling, flash annealing+quenching and short-time tempering continuous heat treatment process, so that the medium manganese steel forms multiphase structure composed of deformed ferrite, martensite and residual austenite, effectively activates multiple strengthening mechanism and phase transformation induced plasticity TRIP effect;Flash annealing simultaneously realizes the reservation of high-density defects introduced by secondary cold rolling and the construction of metastable residual austenite, and the yield strength of the medium manganese steel is improved from 681MPa to 1195MPa;The tensile strength is improved from 986MPa to 1648MPa, while maintaining a good elongation of 16.2%.Compared with the conventional flash annealing process, the application method obtains more excellent mechanical properties at a lower annealing temperature, effectively reduces the production cost and helps the industrialization of the process.