13results 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 discloses a kind of cost-reducing thermal mechanical fatigue test pieces and preparation method thereof, belong to single crystal superalloy technical field.The thermal mechanical fatigue test piece of the application includes gauge length section, transition section, base material clamping section, weld and auxiliary material clamping section.The thermal mechanical fatigue test piece preparation includes conformal base material (including gauge length section, transition section and base material clamping section) preparation, auxiliary material preparation and base material and auxiliary material welding.Wherein, base material is expensive single crystal superalloy, and auxiliary material is low-cost single crystal superalloy, to replace most expensive base material with auxiliary material.In addition, in order to save expensive base material, base material is prepared by conformal design and conformal part directional solidification.The single crystal test rod is prepared by directional solidification of auxiliary material.The connection of base material and auxiliary material is completed by welding.The thermal mechanical fatigue test piece designed and prepared by the application significantly reduces cost, and the high-temperature strength of test is high, meets the requirements of thermal mechanical fatigue experiment.

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 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.

The invention 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 a component A and a component B, the component A is prepared from the following raw materials: biphenyl novolac epoxy resin, hexa (4-hydroxymethyl phenoxy) cyclotriphosphazene, modified nano calcium zirconate, cage-shaped octa (aminophenyl) silsesquioxane, n-butyl glycidyl ether, a KH-550 silane coupling agent, polyether amine, fumed silica and a de-foaming agent; the component B is prepared from the following raw materials: polyborosilazane and 2-ethyl-4-methylimidazole. Cage-shaped octa (aminophenyl) silsesquioxane in raw materials of the sand consolidation agent strengthens the stability of a network structure through chemical bonding, hexa (4-hydroxymethylphenoxy) cyclotriphosphazene achieves thermal stabilization through chemical bonding and physical dispersion, and modified nano calcium zirconate plays a physical support role. The three synergistically improve the heat resistance of the system.

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 high-temperature annealing strengthened pure tantalum and a preparation method and application thereof, and the preparation method of the high-temperature annealing strengthened pure tantalum is as follows: first, cold plastic deformation processing is carried out on pure tantalum at a temperature not higher than 30 DEG C for not less than 1 time to obtain fine-grained or ultrafine-grained pure tantalum, and then the fine-grained or ultrafine-grained pure tantalum is annealed in a vacuum at 300-600 DEG C to obtain the high-temperature annealing strengthened pure tantalum. The pure tantalum prepared according to the above preparation method appears an annealing strengthening effect at 500 DEG C high temperature, and further improves the high-temperature strength of the pure tantalum, thereby laying a theoretical foundation for expanding the application field of the pure tantalum and improving the application capability of the pure tantalum.

The invention provides an aluminum-based silicon carbide composite plate strip, and relates to the technical field of plate strips, a high-temperature transition layer is used for realizing gradient transition of high-temperature resistance and thermal stress, can effectively relieve high-temperature temperature difference stress between a zirconium modified pure aluminum anti-cracking main body layer and the high-temperature transition layer of a plate, and avoids deformation and cracking of the whole structure of the plate due to overlarge cold and hot gradient; the low-temperature buffer layer is matched with the boron fiber enrichment transition layer, so that the high-temperature-resistant strength of the transition area can be further improved, the boron fiber enrichment transition layer is prevented from structural instability at high temperature, the low-temperature buffer layer can realize gradient transition of low-temperature resistance and stress, and the low-temperature shrinkage stress of the lower layer of the plate can be effectively relieved; the temperature-resistant composite main body layer can bear the stress of all upper-layer structures and uniformly disperse the stress to the whole region, stable support is provided for all upper-layer functional structures, meanwhile, the temperature resistance of the temperature-resistant composite main body layer is complementary with the temperature-resistant and low-temperature-resistant structures of all the layers, and finally the comprehensive effects of heat resistance, cold resistance, cracking resistance and protection of the plate are achieved.

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.

The invention relates to the field of metal materials, in particular to a niobium-containing 304 austenitic stainless steel plate for nuclear power and a preparation method of the niobium-containing 304 austenitic stainless steel plate for nuclear power, and the niobium-containing 304 austenitic stainless steel plate comprises the following components in percentage by mass: 0.02%-0.06% of C, 1.00%-2.00% of Mn, 0.20%-0.75% of Si, 0-0.030% of P, 0-0.005% of S, 18.00%-19.50% of Cr, 8.00%-10.50% of Ni, 0.2%-0.8% of Nb, 0-0.10% of Cu, 0-0.10% of Co, 0-0.10% of N and the balance of Fe and other inevitable impurities. The 304 austenitic stainless steel is improved, and the niobium element is added, so that stable production of the 304 austenitic stainless steel plate for nuclear power can be ensured, the 304 austenitic stainless steel plate has excellent grain size, intergranular corrosion resistance and mechanical property, and the design requirements of steel for nuclear power are met.

The utility model discloses a thickness cooling air device for overflow method substrate glass forming, the thickness cooling air device comprises two soaking box bodies and a cooling mechanism which are arranged at the bottom of an overflow brick, the soaking box bodies are located on the two sides of substrate glass respectively, and the cooling mechanism comprises a plurality of first cooling air pipes, a second cooling air pipe and a fixing assembly; the first cooling air pipe is arranged outside the soaking box body, and an air inlet of the first cooling air pipe is used for being communicated with cooling air; the second cooling air pipe penetrates through the soaking box body, an air outlet of the second cooling air pipe is close to the substrate glass, and the second cooling air pipe is made of a high-temperature-resistant material; and the first cooling air pipe and the second cooling air pipe are communicated through a fixing assembly. The problems that the thickness of the glass plate is repeatedly adjusted, the efficiency is low and the precision is poor due to the fact that the relative position between cooling air and the glass plate cannot be accurately adjusted due to the fact that a thickness air pipe is prone to deformation after long-term use can be solved.

This invention belongs to the technical field of welding materials and discloses a high-temperature resistant multi-element high-entropy alloy brazing filler metal and its preparation method. By mass fraction, it comprises the following components: Co 15%–25%, Ni 15%–25%, Cr 15%–25%, Fe 15%–25%, Cu 15%–25%, Mn 0.1–3%, Si 0.1–6%, B 0.1–5%, Sc 0.5–0.9%, and Y 0.1–1%. The preparation method of this invention is simple to operate, low in cost, highly efficient, and highly adaptable, showing great application potential. The high-entropy alloy brazing filler metal of this invention can be used in high-temperature, high-pressure, and corrosion-resistant environments after welding.