105results about How to "Good high temperature mechanical properties" patented technology

The invention belongs to the technical field of rubber sealing material, and relates to a preparation method of a high temperature and high pressure resistant rubber sealing material which can be applied to an oilfield deep oil production engineering process; first, 100 parts of hydrogenated nitrile rubber is weighed by parts in weight, put into a mixing mill to be plasticated; and then 2 to 20 parts of metal oxide, 1 to 5 parts of stearic acid, 5 to 100 parts of acrylate, 10 to 70 parts of carbon black, 1 to 6 parts of aging inhibitor, 5 to 30 parts of plasticizer, 2 to 10 parts of antiscorcher, 2 to 10 parts of vulcanizer and 2 to 10 parts of vulcanization aid are sequentially added into the mixing mill to be mixed uniformly; mixing rubber is vulcanized primarily in a plate vulcanizing press, the vulcanizing temperature is controlled to be 150 to 180DEG C, the vulcanizing time is 20 to 40min, and the vulcanizing pressure is 10 to 20MPa; after being taken out from the plate vulcanizing press, the rubber is secondarily vulcanized at 150 to 180DEG C to obtain vulcanized rubber with excellent performance; and the preparation method of the high temperature and high pressure resistant rubber sealing material has the advantages of simple process, convenient operation and use, low preparation cost, excellent mechanical performance, and in particular better high-temperature mechanical performance.

The invention relates to a preparation method of aluminum oxide metal ceramic reinforced iron-based composite, namely, aluminum-oxide-based metal ceramic is used as a structural framework and one of effective components to prepare metal ceramic iron-based composite, which is consistent in structure, even in metal phase distribution, high in mechanical performance, and high in wear resistance, under certain pressure by melt casting and further processing. The preparation method includes the steps of firstly, preparing aluminum oxide metal ceramic framework base pretreated by activated Si into surface-modified prefabricated ceramic part with a silk-screen-shaped pore structure by high-temperature sintering; secondly, preparing a pouring sand module; thirdly, placing the pouring sand module into a casting sand box for pretreating, pouring, vacuumizing, and allowing iron-based molten metal to fully permeate into pores of the prefabricated ceramic part to form a rigid integrity; and fourthly, performing heat treatment and air cooling to obtain the iron-based composite with closely combined aluminum oxide metal ceramic and iron base.

The invention discloses a method for achieving forming of GH4738 nickel-base superalloy turbine discs, and relates to a method for preparing the GH4738 nickel-base superalloy turbine discs. The method aims at solving the problems that an existing technology for preparing the GH4738 nickel-base superalloy turbine discs is complex and low in efficiency, and cannot achieve the purposes that the turbine discs are good in quality, even in grain distribution and free of surface crack. The method for achieving forming of the GH4738 nickel-base superalloy turbine discs comprises the following steps: adopting a compound insulation method with a sheath and insulation cotton, carrying out double-firing-number heating, upsetting and die forging, and carrying out solidifying solution and double aging processing at the subsolid solution temperature. By means of the method, the GH4738 nickel-base superalloy turbine discs with different diameter dimensions and disc thicknesses can be prepared. The method can be applied to preparation of nickel-base superalloy turbine discs in the field of petrochemical engineering and aerospace, and preparation of other disc forge pieces used under the high temperature condition.

The invention relates to a polymer electrolyte rigid package lithium ion battery which adopts a polymer electrolyte and an ultrathin metal casing, the polymer electrolyte bonds a positive electrode and a negative electrode with a membrane, thus leading a battery core to have self-strength and self-rigidity; the thickness of the battery is no longer maintained by relying on the rigidity and hardness of the metal casing, but relying primarily on self-strength and self-rigidity of the battery and secondarily relying on the rigidity and hardness of the metal casing, the two mechanisms jointly act to control the battery thickness, and the purpose of improving the battery capacity is realized by filling a plurality of active materials. The polymer electrolyte improves safety of the battery, overcomes various defects of a polymer electrolyte soft package battery and improves reliability of the battery. Compared with the existing lithium battery with a liquid metal casing, the polymer electrolyte rigid package lithium ion battery produced by adopting the method can improve the capacity by 10-30%; compared with a polymer electrolyte soft package battery, the polymer electrolyte rigid package lithium ion battery produced by adopting the method can improve the capacity by 8-20%, and the bulge and leakage rate of the battery can be less than 0.1ppm.

The invention discloses a microalloying method for improving toughness of molybdenum and molybdenum alloy fusion welding lines. The microalloying method comprises the following steps: 1) the surfaces of areas to be welded on workpieces to be welded are pretreated, wherein the workpieces to be welded adopt materials of molybdenum or molybdenum alloys; 2) titanium layers are filled in the joined places of the workpieces to be welded; 3) the workpieces to be welded are placed in an inert gas protective atmosphere or a vacuum environment; and welding areas of the workpieces to be welded are preheated; and 4) the workpieces to be welded are welded; and welding line areas of the welded workpieces are insulated, and are cooled to reach the room temperature to finish microalloying of fusion welding lines of the workpieces. The method can eliminate the segregation problem of impurity elements in the grain boundary, and prominently improves the toughness of the molybdenum alloy fusion welding lines.

The invention discloses a 12Cr2Mo1R heavy plate under critical hydrogen, which comprises, by weight, 0.12 to 0.15 percent of C, equal to less than 0.10 percent of Si, 0.50 to 0.60 percent of Mn, equal to or less than 0.008 percent of P, equal to or less than 0.005 percent of S, 2.35 to 2.50 percent of Cr, 0.95 to 1.05 percent of Mo, 0.020 to 0.045 percent of Al, 0.013 to 0.020 percent of Nb, equal to or less than 0.15 percent of Cu, equal to or less than 0.003 percent of Sb, equal to or less than 0.015 percent of Sn, equal to or less than 0.016 percent of As, equal to or less than 0.002 percent of O, equal to or less than 0.008 percent of N, equal to or less than 0.0002 percent of H, and the balance Fe as well as unavoidable impurities. The standard of 12Cr2Mo1R heavy plate under critical hydrogen defined by national standard GB 713-2008 has been improved. Constituent elements of 12Cr2Mo1R heavy plate under critical hydrogen and the proportion of the elements have also been optimized. The thickness of the obtained 12Cr2Mo1R heavy plate under critical hydrogen is within 155-170 mm, thereby increasing the thickness of the plate while ensuring the mechanical properties of the plate to be compatible with the standards for plates with a thickness of less than 150 mm defined by national standard 713-2008.

The invention relates to a method for surface modification of alumina-based ceramic fiber. The method comprises the steps of: adhering a precursor solution of SiO2 to the surface of the alumina-basedceramic fiber uniformly, and performing an in-situ chemical reaction on the surface of the fiber to form uniform SiO2 nano particles so as to complete the surface modification of the alumina-based ceramic fiber. By adopting the method to perform the surface modification of the alumina-based ceramic fiber, the strength of the fiber can be improved, and good mechanical properties of the alumina-based ceramic fiber can also be maintained at high temperature; meanwhile, surface micro cracks which can be formed during preparation of the alumina-based ceramic fiber can be repaired, and the surface state of the alumina-based ceramic continuous fiber can be improved; the method has a wide range of application, can be applied to alumina-based ceramic long fiber, alumina-based ceramic short fiber, fiber products of the alumina-based ceramic long fiber and alumina-based ceramic short fiber and the like, and is suitable for industrial production and easy to popularize.

The invention discloses a liquid aromatic amine epoxy resin curing agent and a preparation method thereof. The liquid aromatic amine epoxy resin curing agent comprises the following components by weight percentage: 70-98 percent of solid aromatic amine and 2-30 percent of low-viscosity aliphatic epoxy resin. The preparation method comprises the following steps of: adding solid aromatic amine with a weight percentage of 70-98 percent in a reaction vessel, raising the temperature to a melting point above, starting an agitator after the material is molten, reducing the temperature to a melting point plus or minus 3 DEG C and dripping the low-viscosity aliphatic epoxy resin with a weight percentage of 2-30 percent for 2-3 batches through an overhead tank; agitating and reacting for 1-2 hours after the end of dripping, reducing the temperature to 50-60 DEG C, and filtering and discharging to obtain the liquid aromatic amine epoxy resin curing agent. The liquid aromatic amine epoxy resin curing agent and the preparation method thereof have the beneficial effects that the liquid aromatic amine epoxy resin curing agent prepared according to the invention can be mutually dissolved with the epoxy resin nearby the room temperature, the quicker polymerization reaction of the aromatic amine with the epoxy resin in the rubber mixing process can be avoided, and the characteristics of small toxicity, excellent curing substance heat resistance and good high-temperature mechanical property of the aromatic amine curing agent are kept.

The invention discloses Mg-Zn-Y directional solidification alloy and a preparing method thereof. The Mg-Zn-Y directional solidification alloy comprises, by mass, 6.00%-9.00% of Zn, 1.00%-2.00% of Y and the balance Mg. The Mg-Zn-Y directional solidification alloy and the preparing method thereof have the beneficial effects that the Mg-Zn-Y directional solidification alloy has columnar crystal tissue, has high strength and certain plasticity under the room temperature, and more importantly has high-temperature mechanical performance; particularly, the Mg-Zn-Y directional solidification alloy obtains a columnar crystal tissue with specific orientation, wherein in the columnar crystal tissue, primary arm growing is parallel, a longitudinal crystal boundary is straight, and a transverse crystal boundary does not exist. Granular phases are dispersed and distributed in crystals, and the crystal boundary phases and the crystal internal granular phases are icosahedron quasi-crystals I-Mg3Zn6Y; and the problems that in the prior art, Mg-Zn-Y alloy solidification tissue is thick, quasi-crystals are connected into a net shape in an eutectic structure form to be distributed among alpha-Mg dendritic crystals, and the quasi-crystal strengthening function cannot be developed fully are solved.

The invention relates to a chromium/zirconium/iron/copper alloy electrode material, and a preparation and application method thereof. The chromium/zirconium/iron/copper alloy contains the following components in percentage by weight: 0.8-2.0% of chromium, 0.2-0.3% of zirconium, 0.01-0.04% of iron and the balance of copper and impurity. The invention also provides a preparation method of the alloy material. The method comprises the following steps: smelting a copper alloy to form a cast ingot, performing hot rolling, and performing solution treatment at 960-980 DEG C; performing cold rolling deformation pressure processing; and finally, performing aging treatment at 430-630 DEG C. Thus, due to the improved mechanical property and heat resistance, high conductivity, high softening temperature and high yield stress at high temperature, the prepared alloy material can be used as an electrode material in welding and indicates excellent continuous welding capability.

The invention relates to an aluminum alloy for pedestrian bridges and a preparation method thereof. The invention is characterized in that the aluminum alloy is composed of the following chemical components in percentage by mass: 0.55-1.0% of Mg, 0.55-0.8% of Si, 0.18-0.55% of Mn, 0.1-0.2% of Cr, 0.05-0.2% of Ta, 0.10-0.3% of Ni, 0.10-0.50% of V, 0.1-0.3% of Cu, at most 0.05% of Zn, at most 0.20% of Fe, at most 0.05% of Ti, at most 0.15% of other impurity elements (at most 0.05% of each of other impurity elements), and the balance of Al. The preparation method comprises the following steps: smelting, refining, casting and uniformizing. By optimizing the alloy composition, trace amounts of Ta, Ni and V are added to obviously enhance the strength, toughness, fatigue resistance, corrosion resistance and processability of the aluminum alloy.

Belonging to the field of ultra-high temperature ceramics, the invention in particular relates to a method for preparation of an ultra-high temperature ceramic matrix composite material containing boron nitride by in-situ reaction. Raw materials include zirconium boride or hafnium boride powder, silicon nitride powder and graphite powder, and are mixed, and then the mixture is subjected to in-situ reaction hot pressing sintering or reaction sintering in a discharge plasma sintering furnace. Under a nitrogen atmosphere, the heating rate is 10-100DEG C/min, the sintering temperature is 1800DEG C-2100DEG C, the sintering time is 10min-2h, and the sintering pressure is 20MPa-40MPa. Therefore, a BN phase is uniformly introduced into an ultra-high temperature ceramic matrix through in-situ reaction so as to finally obtain a ZrN(HfN)-SiC-BN composite material or ZrC(HfC)-SiC-BN composite material. The composite material can be used a nozzle throat liner and jet vane of a solid rocket engine, and a nose cone, end, wing leading edge of ultra high speed aircrafts and other high temperature resistant structural components.

The invention provides a novel nitride-reinforced martensite heat-resisting steel. The steel is characterized in that main alloy components of the martensite heat-resisting steel comprises, by weight, 0.8-1.5% of Mn; 8.0-10.0% of Cr; no more than 1.5% of W; no more than 1.5% of Mo (wherein wherein the sum of the weight percentages of W and Mo is 1.5-2.0%); no more than 0.06% of Nb; no more than 0.15% of Ta (wherein Nb+Ta accounts for 0.05-0.15%); 0.1-0.3% of V; 0.03-0.05% of N; and balance of Fe. According to the invention, the content of the element Mn is increased. On a basis that a phase change point of a material AC1 is almost not reduced, heat-resisting steel original martensite tissues reinforced by high-thermal-stability nitride precipitate is obtained. With the controlling over the contents of elements Co, W, Mo, N, and the like, Laves phase and Z phase precipitation of steel during long-term high-temperature service can be retarded. Therefore, the obtained steel has relatively high tissue stability and good high-temperature mechanical properties.

The invention discloses high-temperature and corrosion resistant aluminum-containing austenitic stainless steel and a preparation method. The high-temperature and corrosion resistant aluminum-containing austenitic stainless steel comprises, by weight, 15%-30% of Ni, 15%-25% of Cr, 2.5%-8% of Al, 1%-3% of Mo, 0.1%-1% of Si, 0.1%-2% of Nb, 0.02%-0.2% of C, 0.02%-0.2% of Y/Hf and the balance Fe. According to the aluminum-containing austenitic stainless steel, the content of Cr is increased to 15-25 wt.%, the content of Al is increased to 2.5-8 wt.%, the aluminum-containing austenitic stainless steel contains Cr and Al elements with the enough high content, both Cr and Al are key elements for improving the oxidation resistance, and the high content of Cr and Al contributes to formation of an Al-Cr oxidation film. A stable and compact Cr2O3 oxidation film can be formed on the surface of the alloy, and the oxidation resistance of the material is improved; and meanwhile, the Al2O3 oxidation film can be formed on the surface of the alloy in an oxidizing atmosphere, the Al2O3 layer is good in thermodynamic stability, low in growth rate and more protective in an extreme environment, and the Al can further form a large number of B2-NiAl phases in a matrix. The using temperature of the material in a high-temperature oxidizing atmosphere is increased, the corrosion resistance of the material is improved, and the material can be used in a high-temperature extreme environment.

The invention discloses an anti-erosion molybdenum alloy electrode and a manufacturing method thereof. The anti-erosion molybdenum alloy electrode is prepared by means of solid-liquid doping and multi-element ball-milling doping. The recrystallization temperature of the electrode is higher than 1300 DEG C, the microstructure of the electrode is uniform crystal grains, the dimensions of which are 20-70 [mu]m, and the electrode is prepared from the following components in percent by weight: 3-5wt% of ZrO2, 0.8-1.2wt% of Si, 0.1-0.5wt% of B, 0.001-3wt% of GeO2, 0.001-3wt% of SnO2, 0.001-3wt% of Bi2O3, 0-5wt% of W and 0-4wt% of Al2O3 and the balance of Mo and inevitable impurities. By controlling the content of zirconium oxide and the proportion of silicon and boron in a Mo-Si-B alloy reasonably, the alloy has good anti-erosion capacity, high recrystallization temperature and high-temperature behavior and also has good processing capacity. In addition, other targeted microelements are alsodoped in the molybdenum alloy electrode, so that the anti-erosion capacity to different molten glass is improved.

The material related by this invention is amorphous and crystallite ceramics composed of Si, B, O, N, C is mole ratio (1-6):1:(2-8):(1-2):(0.2-0.5). The prepn. steps are: a. silicon tetrachloride and benzaldehyde are mixed and illuminated by ultraviolet lamp to react to generate silica compound; b. alkylamine is put into the silicon compound to generate organic polymer Si-O-N, C. boron compound is put into into the organic polymer Si-O-N to generate organic polymer Si-B-O-N-C; d. organic polymer Si-B-O-N-C is splited to Si-B-O-N-C powder in pipe-type air protecting furnace; e. the prepared Si-B-O-N-C powder is fired to produce compacted ceramics Si-B-O-N-C by vacuum air heat pressing.

The invention discloses a continuous extrusion process of a high-strength and high-conductivity copper alloy, application of the continuous extrusion process and a die material. The die material is made of a forged high-temperature nickel-based alloy, and the alloy comprises 0.05% of C, 15% of Cr, 6% of Mo, 5% of W, 2% of Ti, 5.5% of Al and the balance Ni. The continuous extrusion process of the copper alloy comprises the following steps that (1.1) an extrusion die adopts the forged high-temperature nickel-based alloy; (1.2) the extrusion die is preheated to 500 - 600 DEG C before extrusion isstarted, a copper alloy casting blank is preheated to 700 - 750 DEG C, then the copper alloy casting blank is fed into a die cavity to be subjected to continuous extrusion to obtain a blank, whereinthe rotating speed of an extrusion wheel is controlled to be 3 - 8 rpm, the extrusion ratio is controlled to be 3-8 and the extrusion gap is controlled to be 0.6 - 2 mm; and (1.3) the blank obtained in the step (1.2) is subjected to high-strength cooling water spraying at an outlet of the extrusion die, and the blank is obtained. The invention provides the application of the continuous extrusion process in preparation of the copper alloy. The die material has very good high-temperature mechanical properties, and the continuous extrusion process solves the problem of desolvation and decomposition of a supersaturated solid solution in the continuous extrusion process and ensures the high strength and high conductivity of the copper alloy.

A process for preparing the SiBONC ceramic with high high-temp (1500-1800 deg. C) stability includes such steps as dissolving organic silica oil and alkylamine in organic solvent, stirring while heating at 70-100 deg. C for 20-30 hr to obtain precursor SiONC, preparing precursor SiBONC, and cracking to obtain SiBONC ceramic powder. Its advantages are high bending strength and breaking toughness, and high high-temp performance.

The present invention relates to preparation process of ceramic material. The preparation process of high temperature structural ceramic material SiBONC includes the following steps: A. mixing silicon tetrachloride and benzaldehyde and irradiating the mixture with ultraviolet lamp for reaction to obtain Si-O polymer; B. adding alkyl amine into the silica polymer to obtain organic Si-O-N polymer; C. adding boride into the organic Si-O-N polymer to obtain organic Si-B-O-N-C polymer; D. cracking organic Si-B-O-N-C polymer in tubular protecting atmosphere furnace to obtain Si-B-O-N-C powder; E. sintering the Si-B-O-N-C powder in vacuum/atmospheric pressure to obtain compact Si-B-O-N-C ceramic. The Si-B-O-N-C ceramic has simple preparation process, and low cost.

The invention includes a superalloy micro-heater, comprising a basement, an insulating layer arranged on the front side of the basement, a patterned heating resistance arranged on the insulating layer and a contact electrode arranged on the heating resistance, wherein, the heating resistance which is made of superalloy material has the advantages of corrosion resistance, high resistance, fast temperature rising and high temperature resistance and can greatly enhance the reliability and repeatability of the superalloy micro-heater.

The invention discloses alloy powder for die steel laser cladding remanufacturing and a preparation method of the alloy powder. The alloy powder comprises the following components of, in percentage by weight, 0.45%-0.60% of C, 4.20%-8.50% of Co, 3.20%-4.80% of Cr, 1.20%-3.35% of Mo, 0.60%-2.40% of Mn, 0.40%-0.85% of Nb, 0.50%-2.40% of Si, 0.8%-3.2% of B, 0.01%-0.03% of Y2O3, 0.01%-0.03% of La2O3, less than or equal to 0.035% of P, less than or equal to 0.025% of S and the balance Ni. According to the alloy powder for die steel laser cladding remanufacturing and the preparation method of the alloy powder, the crack resistance, the formability, the process stability and the component uniformity of the alloy powder in the laser cladding process can be improved, the high-temperature mechanical property of 4Cr5Mo3V die steel is improved, the service life of the 4Cr5Mo3V steel is prolonged, and the economical efficiency is good.