7428results about How to "Improve fatigue resistance" patented technology

The invention relates to an air-powered engine assembly, which comprises an air tank, an air valve, an air distributor, an intake pipe, camshafts, an intake duct, an exhaust control device, air cylinders, pistons, crankshafts, couplers, clutches, automatic gearboxes and differentials connected with the outside. The assembly is characterized in that the air valve, a constant pressure chamber and a pressure controller are arranged between the air tank and the air distributor; the air distributor is connected with a plurality of air cylinders on an air cylinder gasket; each air cylinder is connected with an exhaust chamber through an exhaust manifold; the exhaust chamber is provided with a turbine generator which is connected with a storage batter; the air cylinders are provided with the camshafts for controlling the air intake and exhaust of the air cylinders; the air cylinders are provided inside with the pistons for driving the crankshafts to rotate; the camshafts and the crankshafts are connected by chains; and the crankshafts are connected with the differentials through the couplers, the clutches and the gearboxes in turn. Therefore, doing work through air compression rather than fuel, the air-powered engine assembly has the advantages of avoiding waste gas discharge and air pollution, along with reliable operation, convenient operation, economical efficiency, practicality and so on. In addition, due to recycle of the waste gas for power generation, the air-powered engine assembly saves energy and reduces costs.

An expandable medical device or component thereof including a tubular body formed of a wrapped sheet of porous polymeric material fused together, the tubular body having a fused seam at an angle relative to the longitudinal axis of the tubular body which changes along the length of the tubular body from a first angle to a second angle greater than the first angle. The sheet of porous polymeric material is wound and then fused together such that the winding angle is less in a first longitudinal section of the tubular body compared with the winding angle in a second longitudinal section of the tubular body, in order to provide the second section with greater resistance to expansion (i.e., lower compliance) than the first section.

A membrane comprising at least one elastomeric material, at least one polymeric fluid barrier material, and a laminar nano-filler having an average platelet thickness of up to about 10 nanometers and an average aspect ratio of at least about 200 provides desirable appearance and low gas transmission characteristics. The membrane may be a single layer, but preferably the membrane includes at least one layer of an elastomeric material and at least one layer of a polymeric barrier material, in which the elastomeric material layer and/or the polymeric barrier material layer comprises the laminar nano-filler.

A photochromic polyurethane laminate that is constructed to solve certain manufacturing difficulties involved in the production of plastic photochromic lenses is disclosed. The photochromic laminate includes at least two layers of a resinous material and a photochromic polyurethane layer that is interspersed between the two resinous layers and which contains photochromic compounds. The polyurethane layer is formed by curing a mixture of a solid thermoplastic polyurethane, at least one isocyanate prepolymer, at least one photochromic compound, and a stabilizing system.

A weather resistant thick steel plate comprises, by weight, 0.06%-0.9% of C, not more than 0.30% of Si; 1.10%-1.50% of Mn, not more than 0.015% of P, not more than 0.003% of S, 0.035%-0.065% of Als, 0.25%-0.50% of Cu, 0.20%-0.50% of Ni, 0.40%-0.70% of Cr, 0.50%-0.15% of Mo, 0.008%-0.018% of Ti, 0.030%-0.060% of V, 0.015%-0.030% of Nb, not more than 0.0055% of N, 0.001%-0.004% of Ca, 0.0004%-0.0010% of selectively added B, and the balance of Fe and unavoidable impurities. The manufacturing method includes deep desulfurization of molten iron, converter smelting, LF, RH, continuous casting, on-line finishing of slabs, cut-to-length torch cutting of slabs, heating, TMCP, and slow cooling of steel plates. The obtained weather resistant thick steel plate has balanced strong toughness and strong plasticity, low yield ratio, atmospheric corrosion resistance, excellent weldability and fatigue resistance, and is especially applicable to non-coating high-rise building structures and bridge structures.

A device for flexibly connecting bones, and a method of using the device for repairing a syndesmotic joint of an ankle are disclosed. The connector has, spaced sequentially, a first portion, a central portion and a second portion, and the portions define a longitudinally extending axis. The method comprises securing the first portion of the connector to a tibia of a patient proximate the syndesmotic joint, securing the second portion of the connector to a fibula of the patient proximate the syndesmotic joint, and, positioning at least a portion of the central portion having increased flexibility in the syndesmotic space.

The invention provides composite material containing a modified basalt and a polymer and a preparation method thereof, wherein the main components of the composite material contains: 1200-1300 parts of polymer, 700-800 parts of modified basalt fiber, and 5-50 parts of surfactant coupling agent. The method, by means of the mechanical force, supersonic wave and electromagnetic force synthetic effect of the surfactant or coupling agent, comprises: uniformly dispersing the polymer and the modified basalt fiber into a solvent to prepare a uniform and stabile mixture, adding another solvent into the mixture, implementing the cladding or wrapping to the modified basalt fiber while precipitating the polymer from the mixture, and then forming the composite material of the modified basalt fiber containing polymer. The composite material can be used for preparing asphalt with excellent performances, the method has the advantages of low cost, simple operation and easy enlargement, and the method makes it easy for the modified basalt fiber to be uniformly dispersed in the polymer.

The invention provides a fiber-reinforced resin-based composite material core. The composite material core is prepared from a fiber-reinforced composite material core in the inner part and an insulating layer on the outer layer, wherein the insulating layer is a glass fiber layer and has the thickness of 0.2-2mm. According to the fiber-reinforced resin-based composite material core, the internal structure is uniform, a layering phenomenon difficultly occurs, the strength is high, the toughness is high, and the cost is reduced.

The invention discloses tread rubber for a large project tire and the large project tire using the tread rubber. The tread rubber for the large project tire consists of (A) tread cap rubber, (B) tread center rubber and (C) tread base rubber. On one hand, the invention adopts rubber matrixes with three different formulas to well solve the problem that an outer layer is easy to overcure if the tread rubber for the large project tire is thick; and on the other hand, the tread rubber prepared by the three formulas of the rubber matrixes can obtain superior equilibrium between abrasion resistance, heat resistance, tear resistance, low heat generation and curing speed.

There are disclosed a resin-reinforced elastomer which comprises as principal components, a rubber and a polyolefin having an average particle diameter of at most 1 .mu.m, and in which the rubber and the polyolefin are linked together; a process for producing the resin-reinforced elastomer by melt kneading a polyolefin, a No.1 rubber and a binding agent to prepare a thermoplastic composition, adding a No.2 rubber to the resultant thermoplastic composition and melt kneading the mixture thus formed to disperse the polyolefin in the rubber components; and a pneumatic tire using the resin-reinforced elastomer in its tread. The above resin-reinforced elastomer has a uniform modulus and a low density, is minimized in directionality, and is excellent in tensile strength, fatigue resistance and abrasion resistance.

The invention provides a polymer modified asphalt, and the weight of the components comprising as follows :45-55% matrix asphalt, 4 - 8% blend oil, 12 - 14% of SBS ,5-9 % APAO, 2-7% of High-temperature improvement and 15-20% filler. It also offers polymer modified asphalt, which made of waterproof membrane and the railway bridge, highway bridge deck waterproofing project applications. The invention of these waterproofing membrane have a high standard of waterproof function, it can withstand high intensity of railway bridge and particularly high stress dynamic load .It also have excellent performance on water-resistance, high and low temperature resistance, adhesion, crack resistance, fatigue resistance and other aspects .it can be used for railway bridge and the road deck waterproofing works.

The invention discloses a high-performance continuous synthetic fiber reinforced thermoplastic composite and a preparation method thereof. The composite comprises the following components including, by weight, 35-60 parts of reinforcing filler, 35-60 parts of thermoplastic resin and 0.5-5 parts of aids, wherein the reinforcing filler includes synthetic fibers which include, by weight, 55-95% of inorganic fibers and 5-45% of organic fibers. The continuous inorganic fibers and the high-performance organic fibers are mixed to reinforce the thermoplastic resin so as to improve the performance of the composite, and advantages of various fibers are integrated to obtain the continuous fiber reinforced thermoplastic composite which is light in weight, high in strength and high in modulus while impact resistance and fatigue resistance are particularly improved. Mixing a small quantity of expensive high-performance organic fibers with the inorganic fibers can achieve better enhancing effect while cost is effectively reduced, so that higher using requirements of materials can be met.

A method for producing a tubular bar, more particularly a stabilizer bar, is provided. The method comprises providing a tubular bar of desired size having an outer and inner surface, heating the bar to an elevated temperature, quenching the bar by application of a cooling fluid to the surfaces of the bar, and forming the tube to a desired shape without annealing. The method further provides for the composition of a high-strength, high formability carbon steel alloy to be used in conjunction with the method. Advantageously, the bar is formable without thermal processing subsequent to quenching. In this fashion, metal tubular bars, such as stabilizer bars, may be formed at reduced cost.

The invention discloses an excellent 100 kg-grade quenched and tempered steel plate with strong toughness and plasticity, and a manufacturing method thereof. The excellent 100 kg-grade quenched and tempered steel plate with strong toughness and plasticity comprises: by weight, 0.09 to 0.15% of C, less than or equal to 0.10% of Si, 0.70 to 1.10% of Mn, less than or equal to 0.013% of P, less than or equal to 0.0030% of S, 0.20 to 0.45% of Cu, 1.30 to 2.00% of Ni, 0.45 to 0.85% of Cr, 0.45 to 0.75% of Mo, 0.045 to 0.070% of Als, 0.008 to 0.025% of Nb, 0.030 to 0.060% of V, 0.004 to 0.010% of Ti, less than or equal to 0.0060% of N, 0.001 to 0.005% of Ca, 0.0006 to 0.0014% of B, and the balance Fe and unavoidable impurities. Through a technology (RQ+RQ+T) combining optimally controlled rolling and offline special conditioning, the excellent 100 kg-grade quenched and tempered steel plate with strong toughness and plasticity forms a microstructure composed of a fine tempered lower bainite and a tempered martensite, wherein an average size of druses is below 20 micrometers; tensile strength is great than or equal to 980MPa; yield strength is great than or equal to 890MPa; and single transverse Charpy impact energy (-60 DEG C) is great than or equal to 47J. Therefore, the excellent 100 kg-grade quenched and tempered steel plate with strong toughness and plasticity has excellent weldability and can solve the problem of over-quenching of a surface of a steel plate with ultra-high strength.

The invention discloses a corrosion resistant heavy rail steel with excellent strength-toughness, fatigue resistance and abrasive resistance, belonging to the technical field of heavy rail steel. A fundamental alloy system comprises the following alloy elements by weight percent: 0.55%-0.72% of C, 0.35%-1.1% of Si, 0.7%-1.40% of Mn, 0.2%-0.65% of Cr, 0.2%-0.65% of Cu and Fe as the balance; on the basis of the above fundamental ingredients, one or more than one microalloy elements are simultaneously added, including: 0.01%-0.055% of Nb, 0.05%-0.10% of V, 0.001%-0.05% of Ti, 0.1%-0.3% of Ni and 0.15%-0.3% of Mo. The heavy rail steel has the advantage that: mechanical properties of steel rail including strength, toughness, fatigue resistance, abrasive resistance, fracture toughness property and welding property are remarkably enhanced, so that superfine pearlite can be obtained without the need of adopting complex production technology such as rail end quenching. And simultaneously, the steel includes corrosive resistance so as to greatly enhance the service property and the service life of steel rail in corrosive environment.

A resin composition comprising: (1) 100 parts by weight of an aromatic polycarbonate resin (component A); (2) 0.005 to 0.6 part by weight of a fluorine-containing organic metal salt having a fluoride ion content measured by ion chromatography of 0.2 to 20 ppm in terms of weight (component B); and (3) at least one component selected from the group consisting of a flame retardant (component C), a fatty acid ester (component D), an ultraviolet light absorber (component E), polytetrafluoroethylene having fibril formability (component F), a filler (component G), a silicate mineral (component H) and a titanium dioxide pigment (component I). A process of manufacturing the resin compositon and a method of preventing the melt dripping during combustion of the resin composition. The flame retardancy of the above aromatic polycarbonate resin composition comprising the fluorine-containing organic metal salt compound is improved.

The invention discloses a carbon composite high-performance thermal-conductive plastic and a preparation method thereof; the thermal-conductive insulating plastic is prepared from a resin basic material, a carbon composite material, a thermal-conductive agent, a coupling agent, an antioxidant and other processing agents; by means of the special crystalline structure of the carbon composite material added in the formula of the thermal-conductive insulating plastic disclosed by the invention, the inter-particle bridging effect is realized; a thermal-conductive passage composed of the thermal-conductive agent is more and more perfect; therefore, the thermal conductivity of the composite material can be rapidly increased; a filling material gathering and thermal-conductive passage is more and more perfect; simultaneously, with the help of the processes, such as a pre-mixing process, an extrusion process, a cooling process, an air drying process and a granulating process, the problems of being degraded in high filling property and low in thermal-conductive property of the plastic are solved; the thermal-conductive composite material having excellent mechanical property and good thermal-conductive effect and insulating property can be prepared; and the thermal-conductive composite material can be widely applied in the fields, such as electrons, automobiles and LED (Light Emitting Diode) lamps.