31results about How to "Quite strong" patented technology

The invention relates to a high-temperature and high-pressure flowing device for evaluating corrosion resistance performance of materials. The high-temperature and high-pressure flowing device comprises a high-temperature and high-pressure autoclave body, a high-temperature and high-pressure autoclave cover, a branch pipe, a branch pipe sealing device, a visual window, a blade, a flow-limiting plate, a stirring rod, a pressure sensor, a temperature sensor, a time relay, and a data collection and control system; the device is manufactured by adopting solidly forging corrosion-resistant alloy steel, achieves maximum working gas sealing pressure of 70MPa and highest working temperature of 200 DEG C, and has the advantages of acid corrosion, alkaline corrosion, chlorine gas and the like corrosion resistance as well as obvious corrosion resistance. A magnetic coupling is arranged, and the revolving speed is digitally controlled by a computer and displayed and recorded in real time, thus realizing circulating flowing of the corrosive medium.. The visual windows are arranged on the two branch pipes of the corrosion device and have equal sealing property, strength, corrosion resistance, temperature resistance, thermal fatigue service life to the high-temperature and high-pressure autoclave body, thus being capable of observing the flowing corrosion conditions of the materials and phase states of the corrosion medium in real time under different temperature and pressure conditions.

The invention discloses a phosphorous slag aerated concrete. The concrete is characterized by consisting of a binding material, an exciting agent, an air entraining agent and water which are mixed, wherein the binding material consists of 60 to 100 weight percent of phosphorous slag and 0 to 40 weight percent of pulverized fuel ash; the exciting agent is water glass with modulus of 1.0 to 1.6; the water glass accounts for 5 to 8 weight percent of the binding material based on the weight of Na2O; the air entraining agent is aluminum powder or simple substance silicon; the using amount of the aluminum powder is 0.1 to 0.2 weight percent of the binding material; the using amount of the simple substance silicon is 0.05 to 0.1 weight percent of the binding material; and the weight ratio of theusing amount of the water to the using amount of the binding material is 0.28 to 0.32. The phosphorous slag aerated concrete product is prepared by taking the industrial waste slag such as the phosphorous slag and the like as the binding material and mixing the phosphorous slag, the exciting agent, the air entraining agent and the water. The phosphorous slag aerated concrete has the advantages that: the preparation process is simple without vapor-pressure process, so that the equipment investment can be greatly reduced; and the product is a sealed porous structure and has the characteristics of light weight, high strength, low thermal conductivity, good thermal insulation property and the like.

The invention discloses a corrugated guardrail plate comprising a baseplate fixedly connected with an obstruction block or a standing column, wherein corrugated plates respectively extend out of two sides of the baseplate; the baseplate is integrated with the corrugated plates; the corrugated plates protrude to the same side of the plate face of the baseplate and exceed the plate face of the baseplate; a smooth transition is adopted between the baseplate and each corrugated plate; both the baseplate and the corrugated plates extend in the length direction of the guardrail plate and are thermoplastic composite plates; and each thermoplastic composite plate comprises a reinforcing frame wrapped in a thermoplastic material layer. Aiming to overcome the defects of high probability of corrosion, high rigidity and poor collision energy absorption of a steel guardrail plate, small elastic modulus, large size and high cost of an all-plastic guardrail plate, and complex manufacturing technology and worse collision energy absorption of a plastic-steel guardrail plate, the invention provides the corrugated guardrail plate, which has the advantages of corrosion resistance and appropriately matched rigidity and flexibility and can reduce harm to a vehicle and personnel to the greatest extent.

The invention relates to a stainless cold-rolling strip steel containing the following components in percentage by weight: not more than 0.02 wt% of C, 0.3 to 0.80 wt% of Si, 0.2 to 0.80 wt% of Mn, not more than 0.040 wt% of P, not more than 0.15 wt% of S, 16.5 to 19.5 wt% of Cr, not more than 0.02 wt% of N, 0.2 to 0.6 wt% of Nb, 0.005 to 0.08 wt% of Al and the balance of Fe and inevitable impurities. The manufacturing method of the stainless cold-rolling strip steel comprises the following steps of: continuously casting the components into a plate blank after smelting, wherein the electromagnetic stirring is adopted in the continuous casting process so that the isometric crystal ratio of the section of the plate blank reaches above 40%; hot rolling: the plate blank is heated to 950 to 1200 DEG C, rolled into strip steel for multiple times and then coiled into a steel roll, wherein the final rolling temperature is 750 to 900 DEG C, the coiling temperature is 350 to 700 DEG C, and then the steel roll is air-cooled into the room temperature; cold rolling: the hot-rolled steel roll is firstly acid-washed, wherein the annealing temperature is 800 to 1000 DEG C, and the annealing time is 0.5 to 5.0 min; rolling for multiple times by cold rolling, wherein the overall reduction is 60% to 75%; and finally annealing the cold-rolled strip steel by acid washing, wherein the annealing temperature is 800 to 1,050 DEG C, and the annealing time is 0.5 to 3 min; and cooling the steel roll below 550 DEG C so that the high-strength strip steel is obtained.

The invention discloses an aging heat treatment method for a 7-series aluminum alloy, and belongs to the field of non-ferrous metal materials and heat treatment thereof. The aging heat treatment method is used for the 7-series aluminum alloy after solid solution treatment, and comprises the following steps that (1) first-stage aging is performed, specifically, a 7-series aluminum alloy workpiece is placed in a heating furnace of 90-120 DEG C for heat preservation for 10-30h; (2) second-stage aging is performed, specifically, the temperature is raised to a second-stage predetermined aging temperature of 165 DEG C-185 DEG C along with the furnace, and after the heat preservation is performed for 1-5h, the 7-series aluminum alloy workpiece is subjected to water cooling to the room temperature; (3) third-stage aging is performed, specifically, the 7-series aluminum alloy workpiece is then placed at a third-stage predetermined aging temperature of 60-90 DEG C for heat preservation for 20-30h; and (4) fourth-stage aging is performed, specifically, the temperature is raised to a fourth-stage predetermined aging temperature of 90-110 DEG C along with the furnace, and after the heat preservation is performed for 10-30h, the 7-series aluminum alloy workpiece is subjected to air cooling to the room temperature. In the second-stage high-temperature aging process, a method of lowering the temperature than the RRA temperature and increasing the heat preservation time is adopted, and the problem of uneven structure and performance caused by the temperature gradient due to rapid heating and cooling of large components is solved.

The invention relates to an axle case for a turning drive vehicle axle. The axle case comprises an axle case body and a turning fork which are connected in a manner of gas metal arc welding (GMAW) and is characterized in that: the axle case body is formed by welding an upper cover plate, a lower cover plate, lateral plates and steel rings; the central parts of the upper cover plate and the lower cover plate have U-shaped structures in opposite orientations; the bottoms of the U-shaped structures are in the shapes of an arc shape and a plane shape; the middle parts of the U-shaped structures are welded with two steel rings; the outer diameters of the steel rings are firmly combined with the lateral plates, the upper cover plate and the lower cover plate respectively; the lateral plates are adaptive to the shapes of the upper cover plate, the lower cover plate and the steel rings; lateral surfaces at both ends of each lateral plate are mutually vertical to the upper cover plate and the lower cover plate; and the cross section of the axle case body is rectangular. The axle case has the advantages of simple and artistic whole appearance, high strength, high rigidity, high toughness, high impact resistance and light weight.

The invention discloses a diatomite asphalt mixture modification agent and a modified asphalt mixture. The diatomite asphalt mixture modification agent is prepared from activated diatomite and polyethylene wax, wherein the mass percent of the polyethylene wax is 2%-22%; the activated diatomite is diatomite obtained by carrying out an activation step on diatomite raw ores; the activation step comprises the following steps of crushing the diatomite raw ores, scrubbing, grading and carrying out ultrasonic vibration; the fineness of the activated diatomite is 325-800 meshes. Compared with an asphalt mixture modified by SBS (Styrene Butadiene Styrene), the dynamic stability DS of the asphalt mixture modified by the modification agent is increased by at least 30%, the water stability (residue stability) is increased by at least 3% and the low-temperature anti-cracking performance (low-temperature failure strain) is improved by at least 1%.

The invention discloses an energy-absorbing flexible guard board. Especially, a plurality of wireropes (1) are intertwined to form a latticed wirerope net (2), the wirerope net (2) is wrapped by a compact plastic material to form a composite board (3), at least more than three steel wires are twisted to form one wirerope (1), and any two adjacent wireropes (1) are intertwined at an interval to form knots (4) of the latticed wirerope net (2). The energy-absorbing flexible guard board is suitable for impact protection of various static objects and moving objects, and is especially suitable for serving as a highway protection plate, and has especially-dramatic effect, and can serve as an upgrade product of the highway protection plate.

The invention discloses a novel assembled buckling-restrained brace. The novel assembled buckling-restrained brace comprises an outer connecting plate and an anti-instability steel pipe, the outer connecting plate is fixedly connected with a force transmission round pipe, the force transmission round pipe is nested in the anti-instability steel pipe, the end, away from the outer connecting plate,of the force transmission round pipe is connected with a round connecting end plate in a welded mode, and the other end of the round connecting end plate is connected with a dumbbell-shaped energy consumption cone steel bar in a friction welded mode, cross stiffening ribs are embedded in the ends, away from the connecting plates, of the force transmission round pipes, the circle centers of the force transmission outer connecting plates, the circle centers of the anti-instability steel pipes, the circle connecting end plates, the circle centers of the dumbbell-shaped energy dissipation cone steel bars, the circle centers of the cross stiffening ribs and the circle centers of the force transmission round pipes are located on the same axis, gaps of 2 mm are formed in the force transmission round pipes and the anti-instability steel pipes, and the cross stiffening rib is connected with the circular connecting end plate in a welding manner and is not fixedly connected with the force transfer circular pipe. The structure is convenient to machine, easy to install, environmentally friendly, capable of improving production efficiency, stable in structural form and capable of remarkably enhancing energy consumption capacity and improving shock resistance and shock absorption capacity of the structure.

The invention discloses a gas engine cylinder cover comprising a gas cylinder cover in which a gas inlet manifold and a gas mixing chamber are arranged; the gas cylinder cover is in an integrated structure with the gas inlet manifold and the gas mixing chamber; the gas inlet manifold is provided with a gas nozzle hole; an air inlet is corresponding to one end of the gas inlet manifold; the gas cylinder cover is integrated with the gas inlet manifold and the gas mixing chamber to form one part, so that the number of parts of an engine is reduced, installation processes are reduced, the whole quality is improved, and the structure is compact; the gas inlet manifold is integrated onto the gas cylinder cover, so that the strength of the gas inlet manifold is the same with that of the gas cylinder cover, the structural strength of the gas inlet manifold is extremely improved, the gas inlet manifold can bear the explosion mixture shock same to that on a combustor, and the reliability of the gas inlet manifold is enhanced.