1716results about How to "Inhibition of segregation" patented technology

The invention discloses a preparation method of a lithium ion battery ternary cathode material. According to the preparation method, full grinding is performed through a colloid mill to improve the reactivity of a precursor and a lithium salt and the uniformity of a mixed material; and a carbon chain organic additive is added in the process of grinding to improve the viscosity of a sizing material, inhibit raw material segregation in the process of drying, quickly balance the temperature of each part of a system in the process of high-temperature reaction and inhibit agglomeration among particles, so that a uniform-appearance and regular mono-crystal ternary cathode material is obtained. Meanwhile, the ternary cathode material is doped and subjected to surface coating modification, so that the structure of the material is stabilized, the side reaction between the material and electrolyte is inhibited, and the high-temperature cycle performance of the material is improved.

The present invention relates to one kind of waste rubber tyre powder modified asphalt and its preparation process. The waste rubber tyre powder modified asphalt consists of asphalt matrix 100 weight portions, waste rubber tyre powder 10-30 weight portions, compatilizer 1-10 weight portions, dissolution promoter 0.5-30 weight portions, activating modifier 1-40 weight portions and emulsifier 0-5 weight portions. It is prepared through a chemical and physical process including the steps of degrading and activating the waste rubber tyre powder, vulcanizing and cross-linking, stirring and shearing. It is suitable for paving and repairing highway.

The invention discloses weathering steel, which comprises the following chemical compositions in percentage by weight: 0.06 to 0.12 percent of C, 0.20 to 0.40 percent of Si, less than or equal to 1.6 percent of Mn, 0.08 to 0.22 percent of P, less than or equal to 0.008 percent of S, 0.01 to 0.06 percent of Al, 0.20 to 0.80 percent of Cu, 0.40 to 0.75 percent of Cr, 0.12 to 0.40 percent of Ni, 0.001 to 0.006 percent of Ca and the balance of iron and inevitable impurity elements. The weathering steel is manufactured by a thin strip continuous casting process. The manufacturing process comprises the following steps of: performing deep desulfurization on molten steel, performing composite blowing on the top and bottom of a converter, performing RH vacuum circular degassing process, and simultaneously performing calcium treatment; performing twin-roll continuous casting, and making the temperature of the molten steel in a molten bath not lower than 1,535DEG C; controlling rolling in the reduction ratio of not less than 30 percent; controlling cooling at the speed 30 to 50 DEG C/s; and coiling at the temperature of between 600 and 650 DEG C. The weathering steel of which the texture is acicular ferrite has good weatherability and can be widely applied to structural materials.

The invention belongs to the technical field of forming and manufacturing of metal materials, and particularly relates to an additive manufacturing method for a functional material part based on a TiNi memory alloy wire. The additive manufacturing method comprises the following steps: smelting a titanium-nickel based memory alloy; preparing a titanium-nickel based memory alloy wire; taking the titanium-nickel based memory alloy wire as a raw material; carrying out a laser-cladding additive manufacturing process; and carrying out tissue control and deformation amount control on manufactured parts. A welding pool of a vacuum self-consumption skull furnace is great, and is beneficial for sufficiently homogenizing alloy elements and preventing alloy segregation; and smelting of the vacuum self-consumption skull furnace refers to controlling a cast titanium tissue of a cast ingot, thereby facilitating follow-up cold-hot processing.

The invention belongs to the modified emulsified asphalt field, and more specifically relates to a SBS polymer modified emulsified asphalt and a preparation method, the SBS polymer modified emulsified asphalt is prepared by the following raw materials by mass percentages: 40-65% of SBS polymer modified emulsified asphalt, 25-50% of water, 2-10% of cation asphalt emulsifier, 0.1-2.0% of composite emulsified stabilizing agent and 0.2-2.0% of acid, wherein SBS polymer modified asphalt is prepared by mixing and reacting a SBS polymer modifier and matrix asphalt, and the mass of the SBS polymer modifier accounts for 3.5%-5.5% of that of the SBS polymer modified asphalt. The prepared SBS polymer modified emulsified asphalt has stable property, and can be used as a cement asphalt mortar layer and the like for a road tack coat, a seal layer, surface treatment, a slurry seal layer and a high speed railway plate-type ballastless track.

The invention provides a method for preparing an ultra-high hardness cladding layer through the synchronous ultrasonic vibration assisting laser technology. According to the specific scheme, the method includes the steps that ultrasonic vibration is synchronously introduced in the Ni-based metal ceramic coating cladding process, mobility of liquid metal can be improved in the mode, tissue distribution is more uniform, in the solidification process, a growing dendrite net can be broken and made to be dispersed to all portions of melt, small crystal nucleuses which are uniformly distributed are formed, segregation of metal ceramic is avoided, and therefore it is guaranteed that the cladding layer is not prone to cracking when ultra-high hardness is acquired; equipment is simple, calibration and installation are facilitated, energy consumption is low, the working environment is good, and acquired coating metal ceramic particles are uniform in distribution, high in hardness and good in abrasion resistance.

The invention discloses a tungsten-rhenium alloy which contains 65-75ppm of potassium and 0.45-0.55% of rhenium. The invention also discloses a manufacturing method of the tungsten-rhenium alloy, which comprises the following steps: A. preparing doping tungsten-rhenium powder: mixing doping tungsten powder solid and ammonium rhenate solution to obtain a doping tungsten-rhenium instillation, and drying the instillation to obtain doping tungsten-rhenium powder, wherein in the mixing process, the temperature is kept at 30-50 DEG C and the solid-liquid weight ratio is (100-300):5; B. reducing to obtain tungsten-rhenium mixed powder; C. compacting; D. presintering; and E. sintering to obtain the tungsten-rhenium alloy. The method has the advantages of simple technique, uniform distribution of doping rhenium in the alloy, and favorable material uniformity; and the prepared tungsten-rhenium alloy has favorable high temperature properties and processability, and thus, is an ideal new material for lamp filaments.

The invention relates to a pulverized coal decoupling combustor with low nitrogen oxide discharge and a pulverized coal decoupling combustion method with low nitrogen oxide discharge. The method is implemented through the following two stages: a) stage 1, firstly separating mixed airflow of pulverized coal and air into a concentrated part and a dilute part by virtue of the pulverized coal decoupling combustor provided by the invention, igniting the concentrated pulverized coal airflow, then feeding the concentrated pulverized coal airflow into a hearth, and performing combined combustion on the concentrated pulverized coal airflow and the dilute pulverized coal airflow; and b) stage 2, mixing the mixed airflow with secondary air in the hearth, and fully combusting the pulverized coal semicoke generated in the stage 1 under conditions of rich oxygen and high temperature which is insufficient to generate thermal NOx, wherein in the stage 1, the pulverized coal is pyrolyzed, gasified and gas-fired under reducing atmosphere, volatile components are fully separated out, products of pyrolysis and gasification are utilized to convert fuel-type NOx into more stable N2. According to the invention, an integration design of pulverized coal condensation, stable combustion and low nitrogen oxide discharge can be realized, the equipment structure is compact, the pulverized coal condensation effect is good, the stable combustion capability is strong, and the potential of inhibiting NOx from generating is high.

The invention relates to an ultrahigh-strength steel plate steel plate with yield strength of 960MPa-level, and a manufacturing method thereof. The steel plate comprises the chemical components of: 0.06-0.11% of C, 0.10-0.50% of Si, 1.20-1.60% of Mn, less than 0.015% of P, less than 0.005% of S, 0.20-0.50% of Cr, 0.10-0.30% of Ni, 0.10-0.30% of Mo, 0.02-0.05% of Nb, 0.02-0 .06% of V, 0.008-0.03% of Ti, 0.0005-0.003% of B, 0.02-0.05% of Al, and balance of Fe. According to the invention, through two-stage controlled rolling, and direct quenching and tempering, a refined tempered martensite or lower bainite structure is obtained. Defects such as long process, high energy consumption, large alloy addition amount, and the like of traditional quenching and tempering process are overcome. The obtained steel plate has good toughness and cold bending performance.

The invention relates to a pumping agent and application thereof, belonging to the field of construction materials. The invention aims to provide the pumping agent and the application thereof. The pumping agent provided by the invention comprises 175-325 parts by weight of polycarboxylic acid water reducing agent, 10-60 parts by weight of retarder, 10-50 parts by weight of water retention agent, 0.1-1.5 parts by weight of air entraining agent and 563.5-804.9 parts by weight of water. The invention also relates to the application of the pumping agent in C15-C70 concrete. The addition amount of the pumping agent accounts for 0.9-2.2 wt% of a cementing material in the concrete. The pumping agent prepared by the invention has the advantages of favorable material adaptability, low addition amount, high water reducing rate, low air content, high concrete strength contribution and the like, mainly solves the problem that the polycarboxylic acid pumping agent is easily subjected to over-addition in practical situations, can effectively prevent the defects of the concrete such as weepage, isolation and the like, and ensures the quality of the concrete.

Provided is an intelligent tunnel lining trolley, characterized by comprising a door-shaped main steel frame, a concrete pouring informationized monitoring system, an end template, a template cleaningand surface lubricating system, an automatic running gear, and a layered window-by-window pouring and cleaning system. The tunnel lining trolley is simple in structure and reasonable in design, and real-time monitoring of each parameter in a concrete pouring process is realized, automation degree of equipment is improved, cleaning and template surface lubrication operation flow are simplified. The intelligent tunnel lining trolley provides convenience for on-site management and construction, and has certain environmental protection property and very high security.

The invention discloses a tunnel underground excavation and lining constriction trolley and a tunnel underground excavation and lining construction method. The tunnel underground excavation and lining trolley comprises a trolley support system and a trolley formwork system; the trolley support system comprises a support system frame, a vertical hydraulic device, an upper vertical pole, a horizontal hydraulic device and a horizontal pole; the trolley formwork system comprises a formwork system frame, a jacking hydraulic oil cylinder, a longitudinal beam, a chord member and a formwork adjusting lead screw. According to the tunnel underground excavation and lining constriction trolley and the tunnel underground excavation and lining construction method, a CRD construction method is effectively improved, by means of the trolley support system, a temporary support system can break median lamella and an inverted arch in one time, the construction period is greatly shortened, and the construction cost is saved; secondary lining is achieved through one-time steel bar binding and pouring, construction joints caused by multiple formworking are reduced, water seepage hidden danger is reduced, and the strength of secondary lining, the smoothness of the outer surface and the overall flatness of concrete are guaranteed.

The invention discloses a stabilizer, in particular to a stabilizer used for SBS modified asphalt and a preparation method thereof; the stabilizer is prepared from the following raw materials according to the parts by weight: 0.5-5 parts of sulfur, 0.2-5 parts of aromatic heterocyclic multifunctional olefin monomers and 90-100 parts of aromatic heavy oils. The invention adopts sulfur as main reactant and aromatic heavy oils as dispersant; the reactant and the reaction promoter can be dissolved in the dispersant to promote the uniform mixing between the reactant and a reaction promoter, increase the uniformity of the reaction of the stabilizer and substrate asphalt and avoid the agglomerate phenomenon caused by locally over crosslinking; the heterocyclic multifunctional olefin monomers areused as the reaction promoter so as to increase the reaction efficiency of the main reactant and the crosslink rate. The invention solves the problems well that SBS is easy to separate from the substrate asphalt and the storage is not stable in the production process of SBS polymer modified asphalt.

The invention discloses a preparation method of a SiC/Al composite material. The method comprises the following steps: carrying out ball milling on alumina and/or silicon oxide powder and a dispersant by using a ball milling medium, adding a binder, and continuously carrying out ball milling to obtain a coating slurry, wherein a mass ratio of the powder to the dispersant to water to the ball milling medium to the binder is 1:0.005-0.01:0.1-0.4:2:0.01-0.03; immersing reticulated porous SiC ceramic in the coating slurry for full absorption, centrifuging, and drying; and embedding secondary-coated reticulated porous SiC ceramic into aluminum or aluminum alloy powder, carrying out vacuum pumping heating to fuse the aluminum or aluminum alloy, introducing argon, and carrying out heat insulation and pressure maintenance to obtain the SiC/Al composite material. The SiC/Al composite material obtained through the method is a bicontinuous phase, and the control of an interface structure and an interface reaction is realized through controlling the composition and performances of the coating slurry to realize strong combination between a silicon carbide matrix and the metal Al and uniform continuous distribution in a three dimensional space, so the segregation and the discontinuousness of the silicon carbide reinforcement are avoided, and the performances of the composite material are improved.

The invention discloses a laser welding method for lapping galvanized steel sheets, which comprises: placing a Al-Sn alloy foil containing 35 to 45 weight percent of Sn between faying surfaces of the steel sheets; and utilizing two laser beams of which the power is respectively from 2 to 3KW and from 3 to 4KW to weld welding seams, wherein the space of the laser beams is between 20 and 50mm and the welding speed is between 4 and 8m/min. The method has low production cost and stable welding quality; and the strength of the obtained welding seams is greater than that of base metal, no welding spatter exists on the surface, and the corrosion resistance of the welding seams is more than three times higher than that of by a sweeping-out method. The method can be used for laser welding of lapped welding seams of DP series, TRIP series and HSLA series hot galvanized steel sheets, and realizes high efficiency, low pollution and low waste material of welding production.

The invention relates to a quality improving method for horizontal continuous casting blanks by applying complex field and the device, belonging to the technical field of preparation of metal material, in particular to the technology of applying complex electromagnetic field and ultrasonic field in the continuous casting process of metal casting blanks. The device is characterized in that a generator of inert gas is arranged at the center of the bottom of a holding furnace; a generator of traveling wave magnetic field is arranged on the side of the holding furnace; a power ultrasonic device is arranged on the holding furnace close to the water port; a restriction electromagnetic coil is arranged on the outer side of a crystallizer. The device has the advantages that: firstly, the production technology is simple, the operation is easy, and the efficiency is high; secondly; the disadvantages of easy broken in rolling and drawing process of casting blank due to more impurity and pores is solved; thirdly, the solidification structure of the casting blanks is uniform, the crystal grain is fine, and the casting blanks can be rolled directly at casting state. The quality improving method and the device are mainly used for the field of metal continuous casting.

The invention discloses a heat-resistant steel structure hard alloy. The heat-resistant steel structure hard alloy comprises a 10-50wt% of hard phase and the balance of a binding phase, wherein the hard phase consists of WC and TiC, and the binding phase consist of 18-38% of Co, 23-53% of Ni3Al, 0-2% of Mo, 0-2% of W and the balance of Fe. A preparation method of the heat-resistant steel structure hard alloy comprises the following steps: selecting hard phase raw materials, namely 0.1-34.8% of WC and 3.0-49.3% of statured sosoloid TiC-WC (3:7) powder as well as binding phase raw materials, namely 9.0-34.2% of Co, 11.5-47.7% of Ni3Al, 0-1.8% of Mo, 0-1.8% of W powder and the balance of Fe powder, wherein the total weight of the raw materials of the hard phase accounts for 10-50% of the total weight of the mixed powder; strengthening wet-milling for not smaller than 48 hours according to the ratio of grinding media to material (in terms of weight) of not lower than 6 and a liquid-solid ratio of 600-900ml/Kg; spraying, drying, pressing and molding the wet-milling mixed materials; performing vacuum solid-phase sintering at 1250-1350 DEG C to obtain the heat-resistant steel structure hard alloy, wherein the binding phase is 50%-90% in percentage by weight. The heat-resistant steel structure hard alloy disclosed by the invention is suitable for being used at 600-900 DEG C and is greatly improved in high-temperature oxidization resistance and high-temperature impact toughness.

The invention discloses a closed type production line device and a method for crushing aluminum oxide crusted blocks. In the invention, materials are crushed primarily on a production line, so that the feeding particle size is less than or equal to 300 millimeters, the discharging particle size is less than or equal to 1 millimeter, a standard discharging particle size which can only be reached by performing secondary and tertiary crushing is reached, the production efficiency is increased, the consumption is lowered, and aluminum oxide crusted blocks are recycled in time; and automatic running of the entire production line is controlled through an electric control system, so that dust purification in the crushing process is realized simultaneously. The closed type production line device consists of a mechanical part and an electric control part, wherein the mechanical part consists of a crusher, an iron remover, a conveyer, a raw material cabin, a gate valve, a vibratory feeder, a pulverizing mill, an air locking discharge valve, a coarse powder separator, a cyclone dust collector, a circular fan, a bag type dust collector, an exhaust fan, iron removers and a finished product cabin. The method for crushing the aluminum oxide crusted blocks comprises feeding, pulverizing, material separating, air replenishing, material and dust collecting and material storing in sequence. The device and the method are safe, environmentally-friendly and efficient, and energy is saved.