5results about How to "Improve high temperature strength" patented technology

The application belongs to the technical field of sand consolidation agent preparation, and particularly relates to a sand consolidation agent and a preparation method thereof. The sand consolidation agent is composed of component A and component B. The component A is composed of the following raw materials: a diphenyl phenolic epoxy resin, hexakis(4-hydroxymethylphenoxy)cyclotriphosphazene, modified nano calcium zirconate, cage octakis(aminophenyl)silsesquioxane, n-butyl glycidyl ether, KH-550 silane coupling agent, polyether amine, fumed silica and defoaming agent. The component B is composed of the following raw materials: polyborosilazane and 2-ethyl-4-methyl imidazole. The cage octakis(aminophenyl)silsesquioxane in the raw material of the sand consolidation agent strengthens the network structure stability through chemical bonding, the hexakis(4-hydroxymethylphenoxy)cyclotriphosphazene realizes thermal stabilization through chemical bonding and physical dispersion, and the modified nano calcium zirconate provides physical support. The three components synergistically improve the heat resistance of the system.

The application belongs to the technical field of refractory materials for blast furnace ironmaking, and particularly relates to a thermal shock cracking resistant taphole clay material and a preparation method thereof. The taphole clay material comprises aggregates, matrix powder and a binder system; the binder system is composed of polysilazane, isocyanate curing agent and B4C micropowder. By introducing polysilazane as the main binder, the application realizes high ceramic yield and low volume shrinkage by using the characteristics of polysilazane being converted into Si-B-C-N ceramic at high temperature. Meanwhile, B4C micropowder is oxidized to generate B2O3 at high temperature, which fills pores, promotes sintering and protects carbon phase, so as to realize volume shrinkage compensation and high temperature strength improvement. The taphole clay material has low shrinkage rate, high cold compressive strength, high high-temperature bending strength and excellent thermal shock cracking resistance, and solves the technical problems of poor volume stability and insufficient high-temperature strength of traditional taphole clay caused by binder carbonization shrinkage.

This utility model discloses a fireproof and high-temperature resistant steel structure, relating to the field of steel structure technology. It includes a fireproof and high-temperature resistant steel plate, comprising a steel plate body with two sets of body sections, and a sandwich panel fixedly connected between the two sets of body sections. Three sets of upper T-shaped strips are fixedly connected to the top surface of the fireproof and high-temperature resistant steel plate. Three sets of lower T-shaped grooves are provided on the bottom surface of the fireproof and high-temperature resistant steel plate, corresponding to the upper T-shaped strips. A slot is provided on one side of the fireproof and high-temperature resistant steel plate, and a locking block is fixedly connected to the other side. This design, by adding a positioning mechanism to the fireproof and high-temperature resistant steel plate, assists users in assembling and fixing individual fireproof and high-temperature resistant steel plates, expanding the applicability of the insulation board body and improving the installation efficiency of the insulation board body.

The application relates to the technical field of precision casting and discloses a casting process for a multiple-assembly high-temperature alloy turbine guide vane for an aero-engine, which comprises the following steps: S1, preparing a vane mold according to the structure of the multiple-assembly high-temperature alloy turbine guide vane; S2, pressing a multiple-assembly high-temperature alloy turbine guide vane wax mold: using the vane mold in step S1 and selecting wax material, a vane wax mold 8 is pressed by adopting an injection molding mode; S3, bonding a mold group: bonding two vane wax molds 8 prepared in step S2 and a pouring system together to form a mold group; S4, preparing an oxide ceramic mold shell, after the mold shell is air-dried, a dewaxing treatment is carried out; S5, pre-burning the oxide ceramic mold shell; and S6, pouring alloy liquid. The multiple-assembly turbine guide vane casting produced through the improvement of the vane wax mold preparation bonding scheme, the oxide ceramic mold preparation process and the pouring process meets the index requirements in terms of grain size, metallurgy and size control, and the production is stable.

The application discloses a functional ceramic reinforced multiphase refractory brick and a preparation method thereof, and relates to the technical field of refractory bricks. The functional ceramic reinforced multiphase refractory brick is prepared from the following components in parts by mass: 25-35 parts of corundum, 15-20 parts of silicon carbide, 12-18 parts of mullite, 1-2 parts of lanthanum oxide, 8-12 parts of silicon nitride, 5-10 parts of zirconium oxide, 2-4 parts of borax, 1-3 parts of titanium dioxide, 4-6 parts of calcium aluminate cement, 0.5-1.5 parts of a metal chelating agent, 0.2-0.5 parts of sodium hexametaphosphate and 3-5 parts of deionized water. Compared with the general metal chelating agent in the prior art, the specific structure metal chelating agent used in the application can form stable chelates with metal ions in the raw materials, strengthens the interface bonding between inorganic particles, inhibits the migration and agglomeration of metal ions at high temperatures, reduces structural defects and improves the overall stability of the brick body.