1647results about How to "Solve cracking" patented technology

The invention discloses a construction method of a wall putty of a plaster-free concrete structure. The construction method comprises the following steps: construction preparation, base course treatment, concave-convex line construction, a first full application of wall putty, flattening, a second full application of wall putty and flattening. The construction method has the advantages of less workload, short construction time, little resource consumption, no hollow drum and crack of the floated coat, no crack at the joint of the primary structure and the secondary structure.

The invention discloses an assembled integral shear wall structure system and a construction method thereof. Prefabricated composite wallboards are hoisted and assembled integrally at a construction site; a board body of the prefabricated composite wallboards comprises a structural layer, an insulating layer and a protective layer from the inside to the outside in turn; a reinforcement cage is arranged in the structural layer; the insulating layer is an extruded polystyrene foam plastic board; steel meshes are arranged in the concrete of the protective layer; and anchor bolts in a dotted distribution are connected among the structural layer, the insulating layer and the protective layer. Vertical seams and horizontal seams of prefabricated composite walls adopt structural self-waterproofing, so that common quality problems such as leakage and cracks and the like in a traditional process are solved. The prefabricated composite walls simplify construction processes, speed up the construction, and lower the construction cost. Furthermore, products prefabricated in a factory have uniform specifications and unified quality, so that the construction quality of a building construction can be sufficiently guaranteed; the industrialization, standardization, and generalization of the building walls are realized; and the products can be widely applicable to the construction of reinforced concrete buildings in the construction industry.

The invention provides a three-layer multi-metal oxide catalyst and a preparation method thereof. The catalyst contains various metal oxides which are taken as active ingredients; and the composition of the active ingredients can be expressed by the following general formulas: MoaBibNieCogSihAiBjCkOx (I), MoaBibNieTifOm (II) and MoaBibSicAldOn (III). The catalyst is applicable to the process of producing corresponding unsaturated aldehyde by selectively oxidizing propylene or isobutene, and can effectively prevent a large number of byproducts from being generated because high-concentration organic substances in feed gas are initially contacted with the catalyst to form higher hot spots, so that the selectivity of catalyst is improved.

The invention relates to masonry mortar special for self-insulation walls, which is a powdery mixture and consists of the components with the following weight portions of 52-68 portions of cementing materials, 20-36 portions of gradation aggregates, 12-25 portions of vitrified hollow micro-pearl, 0.2-0.26 portions of redispersibility emulsion, 3-12 portions of thickener rheology agent, 0.05-0.3 portions of water retaining agent, 0.05-0.3 portions of anti-fissure strengthening agent and 0.012-0.035 portions of anti-entraining agent. The invention has the advantages of good water retention, lowheat conductivity, high mechanical strength, good flexible crack resistance, good waterproof performance, good dry shrinkage resistance, good fireproof performance, easy construction, high performance-price ratio, energy saving performance, etc.

The invention relates to the field of magnetic materials, in particular to a method for manufacturing an anisotropic multi-pole magnetic ring through dry-press forming. Aiming at the problem that the multi-pole magnetic ring manufactured by the prior art through the dry-press forming is easy to crack, has low yield and the like, the invention provides the method for manufacturing the anisotropic multi-pole magnetic ring through the dry-press forming, and for the multi-pole magnetic ring manufactured by the method, the surface magnetism is more than 1,500 Gs, the Br is more than 3,600 Gs, and the Hcb is more than 3,000 Oe. The aim of the invention is achieved through the following technical proposal: performing wet method pulverization on magnetic powder; adding more than one binding agent and lubricating agent into the magnetic powder which is dried; then performing prepressing and pre-magnetization on the mixture, and then performing a mixing process for mixing the mixture by using a high-speed disintegrator; performing a double-sided equal pressure forming process on the powder in a radial magnetic field; and performing a sintering process for sintering the formed sample, wherein the magnetic powder contains a pre-sintering material and an additive.

The invention discloses concrete healant, which comprises following components by weight percent: 30 to 55 percent of gelatinization materials, 40 to 65 percent of fine aggregates, 0.1 to 0.5 percent of water reducing component, 0.05 to 0.5 percent of early-strengthening component, 0.05 to 0.2 percent of delayed-coagulation component, 0.2 to 1.0 percent of nano materials, 0.5 to 1.0 percent of high-activity substances, 0.01 to 0.2 percent of water retention thickening component, 0.2 to 2.0 percent of polymer and 0.02 to 0.2 percent of defoaming agent. The concrete healant not only has characteristics of good mobility, fast strength development, high adhesion strength and small retraction, but also can fill active substances into original concrete gaps and can produce compact crystals, so that the cohesion strength of the new and the old concrete interfaces can be remarkably improved, and the concrete healant is applicable to the concrete mending projects of bridges, caves, industrial workshops and civil construction.

The invention discloses high-manganese high-nitrogen low-nickel stainless steel plate blank continuous casting crystallizer covering slag which comprises the following components in percentage by weight: 54-57% of wollastonite, 9-13% of fluorite, 9-13% of sodium carbonate, 0-1% of lithium carbonate, 5-7% of glass dust, 8-12% of vanadine soil, 2.5-2.7% of soot carbon and 3-3.5% of graphite, and comprises the chemical components in percentage by weight: 31.9-34.9% of calcium oxide, 32.1-35.1% of silicon dioxide, 7.3-8.3% of aluminium oxide, 0.5-1.5% of magnesium oxide, 0.5-1.4% of iron sesquioxide, 4.4-6.4% of fluorion, 6.5-7.5% of sodium oxide, 0-0.39% of lithium oxide, 4.5-6.0% of fixed carbon and 4-7% of gas volatile matters. The alkalinity of the covering slag, namely the ratio of CaO to SiO2, is 0.91 to 1.00, the melting point of the covering slag is 1100 DEG C to 1160 DEG C, and the viscosity of the covering slag is 0.3 to 0.6 Pa.s at 1300 DEG C. The invention can solve the problems of easy crusting, slag entrainment, slag inclusion, slag sticking on casting blank surfaces, bubbles under skins, cracks, deep chatter mark, felting, bleed-out, and the like of the covering slag in the crystallizer during high-manganese high-nitrogen low-nickel stainless steel plate blank continuous casting, and has the advantages of uniform and stable slagging in the crystallizer, good casting blank quality, difficult felting and bleed-out, and the like.

The invention provides a high-impact toughness man-made quartzite slab and a preparation method thereof. The man-made quartzite slab comprises the following components in percentage by weight: 58-75 percent of particle raw materials, 15-33 percent of quartz powder, 0.01-10 percent of paint, 0.1-1 percent of coupling agent, 8-12 percent of adhesive and 0.8-2 percent of curing agent, wherein the particle raw materials are quartz particles, glass particles, or a mixture of the two. The man-made quartzite slab provided by the invention has the characteristics of low probability of cracking and deformation, and the like.

The invention discloses a flexible display device and a manufacturing method thereof, and belongs to the filed of display technology. The flexible display device comprises a flexible display module and a flexible covering layer, wherein the flexible display module is covered with the flexible covering layer; the flexible covering layer and the flexible display module are adhered together through an optical transparent adhesive tape; and the surface, in contact with the optical transparent adhesive tape, of the flexible covering layer is rugged. Through the technical scheme, the bending resistance of the flexible display device can be improved.

The invention discloses a process for producing a large-size 7055 aluminum alloy round ingot. The process comprises the following steps of firstly preparing the following raw materials in mass ratio: less than or equal to 0.10% of Si, less than or equal to 0.15% of Fe, 2.0-2.6%b of Cu, less than or equal to 0.05% of Mn, 1.8-2.3% of Mg, less than or equal to 0.04% of Cr, 7.6-8.4% of Zn, less than or equal to 0.06% of Ti, 0.08-0.25% of Zr and the balance of inevitable impurities and aluminum; smelting, refining, skimming slag, standing, carrying out heat preservation, carrying out online degassing and refining and casting by virtue of stepped casting process parameters, wherein the casting speed is 15-25mm/min and the water flow is 600-1300l/min. By the process for producing the large-size 7055 aluminum alloy round ingot, the casting composition segregation can be avoided and the generation of casting cracks can be solved, the finished product rate is high and the thickness of the coarse-grained layer is much lower than conventional levels.

The invention discloses an upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts. The method includes that: firstly, enabling draft of a tube body die to range from 1 degree to 3 degrees, enabling the outer diameter of a blank to be 50% to 98% of that of a die tube body, enabling the height of the blank to be 60% to 150% of that of the tube body; spraying a protective lubricating layer with thickness ranging from 0.2mm to 3mm on the blank; heating the blank in an electric furnace under 5 DEG C to 50 DEG C of the temperature phase-transition point (alpha +beta/beta), enabling the heating coefficient to be larger than or equal to 0.6 min/mm, simultaneously preheating the die for 6h to 24h at a temperature ranging from 200 DEG C to 450 DEG C; finally, installing the die on a pressure machine, a die forging hammer or a counter-blow hammer, and forging the diathermal blank inside a die cavity. The upsetting and extruding precision die-forging forming method for producing the large titanium alloy deep tube parts is simple in procedure operation, stable and reliable in performance, and is easy to control quantity and to realize large-batch industrialized production of products.

The invention discloses a thermal treatment technology of high-nitrogen stainless bearing steel, comprising the following steps of: primarily preheating at a temperature of 650+/-10 DEG C and preserving the temperature for 25-35 min; secondarily preheating at a temperature of 850+/-10 DEG C and preserving the temperature for 20-45 min; quenching at a temperature of 1060+/-10 DEG C and preserving the temperature for 50-60 min; cooling to the room temperature after the quenching and performing cold treatment in half an hour at a temperature of -196+/-5 DEG C for 2-3 h for twice; and warming to the room temperature after the cold treatment and performing tempering immediately at a temperature of 160+/-5 DEG C for 4-4.5 h for twice. The best thermal treatment technology of 40Crl5Mo2VN high-nitrogen stainless bearing steel of the invention, which is finally determined on the basis of numerous experiments, not only effectively controls the content of the remained austenite to guarantee the size stability problem of the 40Crl5Mo2VN steel workpiece, but also solves the deformation problem and crack problem of the thermal treatment.

The invention relates to a one-step preparation method of a nanometer ceramic bond type superhard material grinding wheel. The preparation method comprises the following steps of using water-soluble nitrate or chlorate, a superhard material abrasive and a perforating agent corresponding to a to-be-prepared ceramic powder as raw materials; dissolving the raw materials, monomers or a crosslinking agent into water, and adding an initiating agent and a catalyst so as to polymerize a nanometer three-dimensional space network and form a gel under the condition of constant temperature of 20 to 80 DEG C; in the gel drying process, precipitating the water-soluble nitrate or chlorate, and forming nanometer grains by the limiting of the three-dimensional space network; uniformly distributing the superhard material abrasive into a base body of the ceramic bond, and adding one or multiple organic matters with better water solubility and lower melting point, so as to obviously reduce the shrinkage of the gel in the low-temperature drying process, early melt or decompose in the dry gel sintering process, and gradually release the stress concentration. By adopting the quick sintering technique, the preparation method has the advantages that the problem of abnormal growth of the nanometer ceramic bond in the subsequent sintering process is solved, and the nanometer ceramic bond type superhard material grinding wheel with good property can be prepared.

The invention relates to a hollow fiber ceramic membrane element and component, which adopts package material comprising ceramic powder, binder and agglutinant to pack the two ends of a hollow fiber ceramic membrane tube bank, solidify and sinter to make into membrane element; the hollow fiber ceramic membrane component is composed of a membrane element, a shell and end lids at the two ends, the membrane element also can be arranged in the shell by adopting serial connection way, the two ends are sealed by end lid, the membrane element are connected by a connector. The invention solves that: the hollow fiber ceramic membrane organic polymer end socket can't be used in strict condition of high temperature, strong acid and alkaline and corrosion, can't stand strong acid and alkaline and is easy to break. At the same time, the invention membrane element adopts modularization design, simplifies the connection and assembly of the component, is beneficial for the upsizing of the equipment and reduces the process cost.

A ribbed steel bar truss concrete superimposed sheet and a ribbed steel bar truss concrete construction method comprise a prefabricated layer and a superimposed layer. The prefabricated layer comprises a steel bar truss net and a concrete layer arranged on the lower portion of the prefabricated layer. A steel bar truss is composed of a lower chord steel bar, an upper chord steel bar and a web member steel bar connecting the lower chord steel bar and the upper chord steel bar. The steel bar truss net is composed of the steel bar truss, an additional steel bar shelved on the lower chord steel bar and vertical to the steel bar truss and a longitudinal steel bar in the lower portion of the prefabricated layer and parallel to the lower chord steel bar of the steel bar truss in the same plane. A plurality of concrete ribs are arranged on the upper end face of the concrete layer along the longitude direction and arranged in parallel. The superimposed layer is a cast-in-place concrete layer arranged on the prefabricate layer. A steel rib net is buried in the superimposed layer. The superimposed layer is connected with the upper chord steel bar in the steel bar truss of the prefabricate layer. The superimposed layer comprises an upper longitudinal bar and the additional steel bar vertical to the upper chord steel bar, and poured into a whole with the upper chord steel bar in the steel bar truss of the prefabricate layer and the web member steel bar. The ribbed steel bar truss concrete superimposed sheet and the ribbed steel bar truss concrete construction method have the advantages of being reasonable in steel bar overall arrangement, good in economy, convenient to hoist and transport, and effective in solving problem of sheet joint cracking.

The invention relates to a process for casting a wear-resistant hammer head, in particular to a process for casting the wear-resistant hammer head by compounding two kinds of metal liquid. A method for synchronously smelting and pouring the two kinds of metal liquid, and molding by using a stripping plate molding machine is adopted. The process comprises the following steps of: manufacturing a mold, a core box, a sand core and the stripping plate molding machine, molding, smelting, pouring, opening the box for cleaning, and performing heat treatment. The hammer head cast by the process has the characteristics of high toughness, strength and wear resistance, the conditions of cracking and falling-off of a hammer handle and the hammer head can be avoided, and wear resistance is high; the stripping plate molding machine is convenient and easy to use, a casting mold is standard, production efficiency is high, and production cost is low; meanwhile, multiple purposes can be achieved, and hammer heads of multiple specifications can be provided for users.