13results about How to "Uniform and stable performance" patented technology

The present application relates to the technical field of rail production process, in particular to a production method for improving wear resistance of channel rail for tram. After universal rolling, compressed air is applied to the channel rail for forced cooling in parts. In the first stage, supersonic air jet cooling is applied to the rail head tread, rail head running edge, rail head left side, rail lip and rail bottom to control the cooling speed of each part. In the second stage, supersonic air jet cooling is continuously applied to each part of the rail to control the cooling speed of each part. In the third stage, subsonic air jet cooling is applied to each part of the rail to control the cooling speed of each part, and then the rail is naturally cooled in air. The quenching effect of the channel rail tread and running edge is improved, the pearlite interlamellar spacing is refined, the rail strength and hardness are improved, and the channel rail has good wear resistance.

The invention relates to the technical field of pipeline cleaning, in particular to powerful dredging gel and a preparation method thereof. The efficient pipeline dredging gel is prepared from the following components in percentage by weight: 1.5 to 15 percent of thickening agent, 2 to 20 percent of alkali metal oxide, 10 to 40 percent of pypocholoride and the balance of solvent, and the thickening agent is prepared by compounding tetradecyl dimethyl amine oxide and sodium metasilicate pentahydrate. According to the invention, through special selection of the thickening agent, the viscosity and the stability of available chlorine are effectively considered, so that the effect of being applied to high-efficiency pipeline dredging for a long storage time is achieved.

This invention discloses a low-cost rare earth weathering steel and its production process. The chemical composition and mass percentage of the weathering steel are as follows: C 0.06%~0.12%, Si 0.25%~0.50%, Mn 0.60%~1.00%, P 0.07%~0.12%, S≤0.005%, Cu 0.15%~0.40%, Cr 0.30%~0.50%, Ce 0.002%~0.015%, Alt 0.020%~0.050%, Ti 0.02%~0.08%, N≤0.006%, with the balance being Fe and unavoidable impurities. This weathering steel uses rare earth oxides added to refining slag, and a high-alkalinity, low-oxidizing refining process to improve rare earth yield. Rare earth inclusions and nozzle turbulence are modified through calcium-magnesium composite treatment, achieving rare earth micro-alloying to replace high-alloy additions. While meeting the mechanical properties and high corrosion resistance of 355MPa grade weathering steel, it significantly reduces alloy costs by more than 15% compared to traditional weathering steel. The process flow is compatible with existing production lines and is suitable for industrial mass production.

The invention belongs to the technical field of high-temperature alloy strip foil preparation, and particularly relates to a nickel-based wrought high-temperature alloy strip foil preparation method and a high-strength plasticity control method thereof. The method is designed according to the rolling process deformation amount and the annealing process of the GH3536 alloy strip foil, so that the rolling process deformation amount is controlled reasonably, the internal organization structure is more uniform, intermediate high-temperature rapid annealing is achieved, coarse internal grains are inhibited, and the grain size and uniformity of the internal organization are adjusted; in the final cold rolling state annealing process step, based on the performance use requirements, vacuum annealing and online continuous annealing processes are designed, and the grain sizes in the foil direction of the GH3536 alloy strips with different thicknesses are controlled through recrystallization annealing, so that the ratio of the thickness to the average grain size is larger than 7. The high-strength and high-plasticity GH3536 alloy strip foil is good in surface quality, the room-temperature mechanical properties can meet the requirements that the yield strength (Rp0.2) is not lower than 310 MPa, the tensile strength (Rm) is not lower than 760 MPa, the room-temperature ductility (A) is not lower than 15%, the performance is uniform and stable, and the requirement for high quality is met.

This invention discloses an integrated waterproofing and sealing construction system for the intersection nodes of municipal underground utility tunnels, belonging to the field of municipal engineering technology. It includes a base, a liquid storage tank fixedly connected to the right side of the upper surface of the base, a support block fixedly connected to the left side of the upper surface of the base, a pump fixedly connected to the upper surface of the liquid storage tank, a pumping pipe fixedly connected to the input end of the pump, and the output end of the pumping pipe extending into the interior of the liquid storage tank. A pipe clamping cavity is fixedly connected to the upper surface of the support block. This construction system achieves efficient utilization of waterproofing and sealing materials through multiple designs, significantly reducing construction costs and material waste. On one hand, the liquid storage tank is equipped with an integrated stirring and wall-mounting cleaning structure. A motor drives a rotating disk to move a rotating column and rod, causing the sliding vertical column to move up and down along the extension cavity. When the sliding block slides along the curved groove, it drives the stirring blades to rotate, continuously stirring the material.

A production method of TMCP hydrogen-doped hydrogen-delivering pipeline steel, characterized in that the chemical composition of the steel contains C=0.03%-0.05%, Si=0.12%-0.30%, Mn=0.95%-1.05%, P≤0.004%, S≤0.0010%, Alt=0.020%-0.045%, Nb=0.040%-0.050%, Ti=0.010%-0.020%, and the balance is Fe and inevitable impurities. The steel plate has good hydrogen environment compatibility performance in addition to the mechanical properties of conventional pipeline steel. In A solution environment, HIC: CSR≤2%, CLR≤15%, CTR≤5%; the tensile strength and the reduction of area of the smooth sample in a 6.3 MPa pure hydrogen environment are greater than 80% and 95% in the air environment; at the same time, in the 6.3 MPa pure hydrogen environment, the K1C of the step compact tension sample is ≥100 MPa·m1 / 2, and the fatigue life is ≥100,000 times.

The application discloses a kind of high-strength corrugated pipes for drainage and manufacturing method thereof, belong to the technical field of corrugated pipe.The corrugated pipe includes the following weight parts components: 50-75 parts of PVC, 8-15 parts of HPVC, 5-15 parts of HNBR, 5-10 parts of modified filler, 4-8 parts of toughening agent, 1-2 parts of antioxidant, 1-3 parts of heat stabilizer, 0.4-1.1 parts of lubricant.By the raw materials of above-mentioned formula are mixed at high speed, using one-step continuous extrusion molding process, under the temperature parameter and blow pressure of accurate control, plasticizing, extruding, blow setting, traction cutting preparation obtains high-strength corrugated pipe for drainage.Compared with prior art, the high-strength corrugated pipe for drainage of the application solves the problem of poor filler dispersibility and weak interface bonding through multi-level synergistic effect.Testing shows that the corrugated pipe of the application has high ring stiffness and excellent low-temperature impact resistance, long service life, and is especially suitable for high-standard drainage engineering.

The application relates to the technical field of building materials, and discloses a composite wallboard and a preparation method thereof, the method comprising base layer preparation, intermediate functional layer preparation, finishing layer preparation, and compounding and post-processing; the composite wallboard is designed as a base layer, an intermediate functional layer and a finishing layer composite structure, each layer is composed of specific raw materials, the interface bonding and the functional component distribution of each layer material are synergistically optimized, the performance requirements of light weight, high strength, heat preservation and heat insulation, fire resistance and flame resistance can be considered, and the realization of the multifunctional integration of the composite wallboard is ensured; after the interfaces of each layer are treated by plasma, epoxy resin adhesives are coated, the chemical bonding of the interfaces between the layers is enhanced, the interlayer bonding strength is improved, the problem of delamination and falling in the long-term use process is avoided, and the structural integrity of the composite wallboard is ensured.

The application provides a 700MPa high-strength hot-rolled steel, a preparation method and application, the chemical components of the 700MPa high-strength hot-rolled steel include the following in mass fraction: C 0.06~0.09%, Si 0.05~0.15%, Mn 1.8~2.0%, Ti 0.11~0.145%, Cr 0.1~0.2%, Nb 0.04~0.05%, V 0.01~0.02%, P≤0.015%, S≤0.002%, N≤0.005% and the balance of Fe and inevitable impurity elements; the thickness of the 700MPa high-strength hot-rolled steel is 8.99~13.99mm. The preparation method is simple, convenient to operate, does not need to add special equipment, can be adapted to the existing hot-rolling production line, is convenient for large-scale production and has strong industrial application value.

The pipe end additive manufacturing method for the oil and gas conveying steel pipe comprises a welded steel pipe and comprises the steps that S1, the excess weld metal of a steel pipe welding seam is polished, specifically, the steel pipe is placed on a rotating mechanism and rotates at a constant speed, and the excess weld metal of the steel pipe welding seam is polished; s2, the pipe end of the steel pipe is cleaned, specifically, surface oil dirt, rust and oxide are cleaned till the surface has metallic luster; s3, the outer surface of the pipe end of the additive steel pipe is subjected to submerged arc surfacing; and S4, the inner surface and the outer surface of the steel pipe end are machined. The method has the beneficial effects that the end part of the steel pipe is thickened in a submerged arc surfacing additional material mode, the production efficiency is high, the welding quality is good, and the performance of the additional material part is uniform and stable; the pipe end of the surfacing additive thickened steel pipe is turned, so that the roundness, perimeter difference and wall thickness size precision of the pipe end are effectively improved, stress concentration is reduced, and the service safety and reliability of the steel pipe are improved.

The application discloses a composite gel particle plugging agent for plugging steam channeling and preparation and application thereof, and belongs to the technical field of oil field chemistry. The plugging agent has a triple composite structure of "rigid inorganic core-elastic gel shell-oil-soluble surface layer", the elastic gel shell penetrates and is chemically anchored in the porous structure of the core through a crosslinked network, and an organic-inorganic interpenetrating interface is formed. The surface modifier is an oil-soluble polymer. The plugging agent realizes the synergy of rigid support, elastic plugging and flexible selectivity, so that the volume retention rate of the plugging agent is greater than or equal to 85%, the single-particle compressive strength is greater than or equal to 1.5 MPa, and the ratio (selectivity index) of the plugging rate of the water phase channel to the damage rate of the oil phase channel is greater than or equal to 7.0 after the plugging agent is aged for 7 days in a steam environment at 300 DEG C and a salinity of 20*10 4 mg / L, and the technical problems of easy failure, low plugging strength and lack of flexible selectivity of existing plugging agents under extreme high temperature and high salinity are effectively solved.

This invention discloses a method for recycling titanium alloy recycled materials based on hot isostatic pressing (HIP), belonging to the field of titanium metallurgy. The method includes the following steps: First, titanium alloy recycled materials with different oxygen contents are accurately calculated and mixed to obtain a homogeneous mixture. Second, a titanium alloy sheath of the same material as the product is manufactured using 3D printing technology. The pre-mixed powder is then filled into the sheath and compacted. Finally, after vacuuming and sealing, HIP sintering is performed to directly obtain a near-net-shape dense blank under high temperature and pressure. This method optimizes the process flow by combining the full densification capability of 3D-printed sheaths with HIP technology, eliminating the remelting, sheath removal, and numerous machining steps required in traditional recycling processes. It directly produces near-net-shape products from recycled materials, significantly reducing energy consumption, labor time, and raw material loss, achieving a high-value green recycling of titanium alloys.

The utility model relates to the technical field of acid liquor injection devices, and discloses a multi-channel parallel operation efficient acid liquor injection device which comprises a base, and an injection mechanism and a stirring mechanism are arranged on the top surface of the base. The first rotating rod and the second rotating rod in the box body are mounted through the first supporting frame and the first frame body which are mounted through bolts, so that acid liquid injection is facilitated, the acid liquid can be effectively replaced according to the same stratum characteristics or acidification requirements through the quick dismounting device, and then fault parts are quickly isolated; a first motor is arranged to drive a first rotating rod and a second rotating rod to rotate, so that a plurality of first stirring blades and second stirring blades in the first rotating rod and the second rotating rod are driven to rotate, acid liquor raw materials in the box body are mixed, meanwhile, a first brush plate and a first filter plate are arranged for filtering and cleaning, and sufficient mixing is achieved; uniform and stable acid liquid performance is ensured, and injection pipelines or stratum pores are prevented from being blocked.