44results about How to "High compressive stress" patented technology

The invention relates to an ultrasonic rolling recombination laser remelting method for improving the fatigue property of a welded joint, and belongs to the field of material processing and surface strengthening. The method comprises the following steps: first, the surface modification of the welded joint is performed according to the laser remelting technology, and then ultrasonic surface rolling treatment is performed. Compared with a pure ultrasonic surface rolling processing method, the ultrasonic rolling recombination laser remelting method has the advantages that not only can surface nanocrystallization and ultra-low roughness of the welded joint be realized, but also the welded joint structure can be improved, welding defects can be eliminated, and the depth of a modified surface layer can be deepened, so that the fatigue strength of the welded joint is greatly improved.

The invention discloses a rectangular spherical hinge adjusting gradient laminated rubber bearing for a highway bridge, which comprises a concrete bearing cushion and further comprises an concave arc steel plate and a bearing main body, wherein the concave arc steel plate is arranged in a beam; the bearing main body is arranged on the concrete bearing cushion; a steel spherical crown cylinder station is arranged at the top of the bearing main body; the top of the a steel spherical crown cylinder station is provided with a a steel spherical crown; and the spherical crown surface of the steel spherical crown is in fit with the concave arc surface of the concave arc steel plate. A steel plate can be arranged between the bearing main body and the concrete bearing cushion; a stainless steel plate is arranged between the steel plate and the bearing main body; and a polytetrafluoroethylene board is arranged between the stainless steel plate and the bearing main body. The rectangular spherical hinge adjusting gradient laminated rubber bearing for the highway bridge has a simple structure, is easy to manufacture and can be directly installed according to the longitudinal and transverse gradient requirements of the bridge, so that a leveling structure between the bearing and a beam body is omitted, the stress of the bearing is improved, the bearing is stressed in a balance mode, the bridge design is also simplified, the rectangular spherical hinge adjusting gradient laminated rubber bearing is convenient to install and replace and the bearing can be well suitable for the longitudinal and transverse gradients of the bridge.

The invention relates to the field of modified polypropylene, and discloses a fiber-reinforced polypropylene composition, a foamed polypropylene composite material and a preparation method of the foamed polypropylene composite material. The fiber-reinforced polypropylene composition contains polypropylene, a polypropylene modifier, glass fibers, a foaming agent and a compatilizer. The preparation method of the polypropylene modifier comprises the following steps of: contacting the polar monomer grafted polypropylene in a composition I or a composition II with a component A for reaction, and extruding and granulating. The fiber-reinforced polypropylene composition provided by the invention can be used for preparing a foamed polypropylene composite material with higher foaming ratio, and the prepared foamed polypropylene composite material simultaneously has higher compression resilience and compression stress, namely has excellent compression performance, and can be used as a buffer material.

The invention relates to a press-in pin (10) for an electrical contacting assembly (1), having an elastic press-in region (12) and an electrically conductive coating (14). The invention further relates to a corresponding contacting assembly (1), and to a method for joining a press-in pin (10) and a metallized via (7). The coating (14) comprises a reactive multi-layer applied to the press-in pin (10) and a first contact layer applied to the reactive multi-layer.

The invention provides a PMOS (P-channel metal oxide semiconductor) transistor and a forming method of the PMOS transistor. The PMOS transistor comprises a semiconductor substrate, a grid electrode structure, a main side wall and a germanium-silicon layer, wherein the grid electrode structure is positioned on the semiconductor substrate, the main side wall is positioned on the side wall of the grid electrode structure, the germanium-silicon layer is positioned in the semiconductor substrate positioned at the two sides of the main side wall, and the germanium-silicon is in a step shape with the gradually reduced line width. The forming method of the PMOS transistor has the advantages that the process is simple, and the performance of the formed PMOS transistor is better.

The invention belongs to the technical field of wood function improvement and wood processing, and specifically discloses an integral reinforced solid wood profile and a manufacturing method thereof. The method comprises the following steps: under the condition of low moisture content (1-3%), the wood is subjected to integral compression treatment with low compression rate by adopting a heating and softening forming technology, so as to obtain an integral compressed material with uniform cross-sectional density. The method can effectively reduce the phenomenon of blasting and bubbling caused by excessive steam pressure inside the wood, greatly shorten the heat preservation time, and improve work efficiency. The overall compressed timber profile obtained by the method of the invention has good dimensional stability, is environmentally friendly and healthy, and can be used for manufacturing solid wood floors, solid wood furniture and as interior decoration materials.

The invention discloses a glass composition and a preparing method and application thereof. The total weight of the glass composition is calculated as 100%, wherein the glass composition comprises 45-65wt% of SiO2, 12-25wt% of Al2O3, 0.5-15wt% of P2O5, 9-17wt% of Na2O, 0.1-5wt% of MgO, 0.1-5wt% of Y2O3 and unavoidable impurities; the invention further provides a preparing method and application of the glass composition in the preparation of a touch screen and / or a solar battery. The glass composition is loose in structure, suitable for chemical strengthening and processing, through short-time chemical strengthening, the deeper strengthening depth and the higher compressive stress and Vickers hardness can be obtained, and the anti-dropping ability of glass is improved.

The invention discloses a composite buffer for a crane and relates to the technical field of buffer equipment. The composite buffer comprises a base, wherein a primary buffer device is arranged on the base and comprises a shell which is fixed on the base; a spring is arranged in the shell; one end of the spring is fixed on the base, and the other end of the spring is connected with a piston; the other side of the piston is provided with a piston rod; one end of the piston rod penetrates out of the shell; the composite buffer also comprises a secondary buffer device; and the secondary buffer device is connected with one end of the piston rod which is exposed out of the shell. According to the composite buffer for the crane, the requirement of a large-tonnage crane on the buffer performance can be met, and the composite buffer is small in size, low in production cost, long in service life, wide in application range and suitable for popularization and application, can replace various buffers of different specifications and is an innovative product in the field.

The invention relates to the field of modified polypropylene, and discloses a fiber-reinforced polypropylene composition, a foamed polypropylene composite material and a preparation method thereof. The fiber-reinforced polypropylene composition contains polypropylene, a polypropylene modifier, glass fibers, a foaming agent and a compatibilizer; the preparation method of the polypropylene modifier comprises: combining the poles in combination I or II The grafted polypropylene with permanent monomer is contacted with component A to react and extruded to pelletize. The fiber-reinforced polypropylene composition provided by the present invention can prepare foamed polypropylene composite materials with a relatively high expansion ratio, and the prepared foamed polypropylene composite materials have both high compression resilience and compressive stress at the same time, That is, it has excellent compression properties and can be used as a cushioning material.

The invention discloses high-strength and corrosion-resisting glassware and a preparation method thereof. The high-strength and corrosion-resisting glassware is prepared from the following raw materials in parts by weight: 80 to 85 parts of quartz sand, 2 to 5 parts of calcium oxide, 0.1 to 0.5 part of iron oxide, 0.3 to 0.5 part of titanium dioxide, 0.1 to 0.3 part of bismuth trioxide, 0.1 to 0.4part of magnesium oxide, 0.1 to 0.3 part of aluminum oxide, 2 to 4 parts of kaolin, 0.1 to 0.3 part of vanadium dioxide, 5 to 10 parts of sodium carbonate, 0.1 to 0.3 part of niobium dioxide, 0.1 to0.2 part of tellurium dioxide and 0.1 to 0.2 part of silver chloride. The preparation method comprises the following four steps: mixing the materials, smelting, molding, and inducing to nucleate. Theglassware prepared by the invention has the advantages of high mechanical strength and strong corrosion resistance and is suitable for being produced and applied in a large scale.

The present invention relates to a method for increasing strengthening behavior of glass. The method includes making a piece of glass, annealing the glass, and then chemically strengthening the glass. Annealing the glass includes heating the glass to a first temperature and maintaining the first temperature for a predetermined first period, cooling the glass to a second temperature and maintaining the second temperature for a predetermined second period, and cooling the glass to an environmental temperature. The first temperature exceeds the annealing temperature of the glass, and the second temperature is lower than the strain point temperature of the glass.

The invention provides a method for manufacturing embedded source / drain MOS transistors. The method comprises the steps that gate structures are formed on a PMOS transistor area and an NMOS transistor area formed on a semiconductor substrate respectively; an oxidation barrier layer is deposited; through a nitriding technology and a post-nitridation annealing technology, nitrogen is added to the oxidation barrier layer to form a nitrogen oxidation barrier layer, and a part of the nitrogen oxidation barrier layer is removed to expose the PMOS transistor area or the NMOS transistor area, or after a part of the oxidation barrier layer is removed to expose the PMOS transistor area or the NMOS transistor area, nitrogen is added to the remaining oxidation barrier layer to form the nitrogen oxidation barrier layer through the nitriding technology and the post-nitridation annealing technology; channels adjacent to the two sides of each gate structure are formed in the exposed area; strained silicon materials grow in the channels in an epitaxial mode to form the embedded source / drain MOS transistors. According to the method, the rate of epitaxial growth of the strained silicon materials in the channels is guaranteed, and the risk of pollution to the embedded source / drain MOS transistors can be lowered through the remaining oxidation barrier layer.

The invention relates to a semiconductor structure and a forming method thereof, a PMOS (P-channel Metal Oxide Semiconductor) transistor and a forming method thereof. The forming method of the semiconductor structure comprises the following steps of: providing a silicon-on-insulator substrate, wherein the silicon-on-insulator substrate sequentially comprises a silicon base, an insulated buried layer and top layer silicon; etching the top layer silicon until the insulated buried layer is exposed to form an active region; forming insulated oxide layers on the side wall and the top of the top layer silicon in the active region; and performing thermal oxidization treatment to ensure that the top layer silicon is bent upwards. The invention further provides a semiconductor structure, a PMOS transistor structure formed on the semiconductor structure and a forming method of the PMOS transistor structure. The invention aims to perform thermal oxidization treatment on the top layer silicon in a PMOS transistor device region so that the edge of the top layer silicon is bent upwards, so that the compression stress of the top layer silicon is enhanced and the performance of a subsequently-manufactured PMOS device is enhanced.

The switch has contact springs (4) transferred into different switching positions by an actuating element and arranged at an anchor formed as an electrical contact. Spring tongues (6, 7) are arranged at a closed spring frame (5). One spring tongue is formed as a resetting unit for the actuating element. Another spring tongue controls switching functions of a contact region (9) of the springs. The tongues are engaged at surface regions of the anchor in a supporting manner such that the springs exhibit stable position during actuation, where the surface regions are turned away from each other.

The invention relates to the field of glass materials, and discloses a composition for glass, glass and a preparation method and application thereof. The composition for glass of the present invention, based on the total weight of the composition for glass, contains 45-66% by weight of SiO 2 , 10‑23% by weight Al 2 o 3 , 0.01‑10% by weight of B 2 o 3 , 0.01‑12% by weight of P 2 o 5 , 10‑19% by weight Na 2 O, 0.01‑5% by weight of K 2 O, 0.01‑5% by weight Li 2 O, 0.01-5% by weight of CaO and 0.01-3% by weight of TiO 2 . The components in the glass composition of the present invention act synergistically to effectively improve the stress relaxation of the prepared glass, and have the advantages of enhanced compressive stress, deep strengthening depth and high impact resistance. It is suitable for protecting display devices, especially for protective covers of display devices, such as touch screen covers.