68results about How to "Reduced likelihood of cracks" patented technology

The invention discloses an environment-friendly colorful tile joint mixture. The environment-friendly colorful tile joint mixture is characterized by comprising the following components in percentage by weight: 35%-40% of white cement, 40.73%-47.75% of waste porcelain powder, 0-15% of quartz powder, 0-10% of titanium dioxide, 1%-1.5% of re-dispersible emulsion powder, 0.1% of water repellent, 0.15% of water-retaining agent, 0.4% of lignin fiber, 0.1%-0.25% of water reducing agent and 0-2% of pigment. The invention further discloses a preparation method of the environment-friendly colorful tile joint mixture. The consumption of quartz sand and heavy calcium powder is reduced by using the waste porcelain powder as the joint mixture filler; the early strength of the joint mixture is improved by virtue of early strength function of the white cement, so that the construction process requirements are satisfied. The waste porcelain powder is sintered at a high temperature, so that the physical and chemical performances are stable, the volume is stable, and the expansion-shrinkage coefficient is close to that of the tile; the material with the same expansion-shrinkage coefficient is used as the filler, so that the possibility that the tile joint mixture generates cracks can be further reduced.

The invention discloses a gold base alloy casting blank melting and casting integrated device and a utilization method thereof. The gold base alloy casting blank melting and casting integrated device comprises a melting pot, a fireproof material cylinder, a cooling base, an outer cylinder, a heating induction coil and a magnetic stirring device. The utilization method of the gold base alloy casting blank melting and casting integrated device comprises putting gold into the melting pot and inserting the melting pot into the fireproof material cylinder; piping inert gas or reducing gas into the outer cylinder; heating the metal inside the melting pot to be melted through magnetic fields, adding other metal or alloy and performing alloying; enabling the melting pot with the fusant to descend to an annual boss of the cooling base and cooling the fusant to cast the fusant which is gradually solidified from bottom to upper during the cooling process. The gold base alloy casting blank melting and casting integrated device has the advantages of being simple in structure, convenient to operate and low in integral cost and enabling prepared gold base alloy to be uniform in ingredient and less in internal defect. The gold base alloy casting blank melting and casting integrated device and the utilization method thereof have good application prospects.

The invention relates to a tile surface material composite plate and a novel construction method thereof. The construction method comprises the following steps: (1) sticking the tile surface material on a base plate to form a tile surface material spliced plate; (2) cleaning the tile surface material spliced plate; (3) forming straight-line-shaped cutting grooves on connecting seams of the tile surface material spliced plate in batches; (4) filling the cutting grooves with a crack-sealer, then curing to obtain the tile surface material composite plate and finishing the construction. The cutting grooves are formed in the modularized tile surface material composite plate in the construction method; the construction efficiency of the tile surface material composite plate can be improved, the labor intensity of the construction staff is reduced, the technological dependence of the construction staff is reduced; in addition, the butt seam precision of the tile is greatly improved, and the attractive effect of the buildings appearance is improved.

The invention relates to the technical field of prefabricated structures, in particular to a prefabricated comprehensive pipe gallery tensioning method. The prefabricated comprehensive pipe gallery tensioning method is characterized by comprising the steps that a plurality of pipe gallery sections are connected and compressed through prestressed steel bars, a jack and a two-way bracket are used for conducting section-by-section preliminary prestress tensioning on the multiplepipe gallery sections until allpipe gallery sections are tensioned, and thus the multiple pipe gallery sections are mutually spliced and fixed and form a continuous pipe gallery; permanent prestressed tensioning is conducted after completion of preliminary prestressed tensioning, and initial prestressing force is unloaded after completion of the permanent prestressed tensioning. The prefabricated comprehensive pipe gallery tensioning method has the advantages that preliminary prestressed tensioning of the latter pipe gallery section cannot affect the already pipe gallery sections; waterproof components between the pipe gallery sections are always in a compressed state, and the pipe gallery sections are prevented from being crushed while the waterproof sealing effect of the pipe gallery is ensured; and the possibility of cracks in the assembly process of the pipe gallery sections is lowered.

The invention discloses a hot-rolled steel plate with tensile strength of 650 MPa and a manufacturing method thereof, and mainly solves the technical problems of high manufacturing cost, low strengthand low low-temperature impact performance of an existing hot-rolled steel plate for an automobile frame. The hot-rolled steel plate with tensile strength of 650 MPa comprises the following chemical components in percentage by weight: 0.06 to 0.08 percent of C, less than or equal to 0.1 percent of Si, 1.05 to 1.20 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.003percent of S, 0.01 to 0.02 percent of Nb, 0.065 to 0.085 percent of Ti, 0.0015 to 0.0045 percent of Ca, 0.02 to 0.05 percent of Alt, and the balance Fe and inevitable impurities, wherein the contentof the above elements meets the requirement that the carbon equivalent is less than or equal to 0.32. The percentage elongation A of the hot-rolled steel plate after fracture ranges from 18 to 24 percent. The hot-rolled steel plate provided by the invention is mainly used for manufacturing cross beams, longitudinal beams and other structural parts of trucks.

The embodiment of the invention provides a display panel and a display device, and relates to the technical field of display for solving the problem that in the prior art, a packaging layer and a blocking part are easy to peel off. The display panel comprises a substrate, a blocking part and a packaging layer, wherein the blocking part surrounds a display area of the display panel; and the blocking part is located on one side of the substrate; and the packaging layer is located on one side, away from the substrate, of the blocking part, wherein the surface of the blocking part in contact withthe packaging layer comprises a concave-convex structure.

The invention discloses a hot-rolled biphase steel plate with tensile strength of 580 Mpa grade for automobile rims. The technical problems of cracking and necking of an existing hot-rolled steel plate for automobile wheels after welding and poor fatigue performance of finished products are solved. The hot-rolled biphase steel plate with tensile strength of 580 Mpa grade for automobile rims is prepared from, by weight, 0.06%-0.08% of C, 0.05%-0.13% of Si, 1.1%-1.3% of Mn, greater than or equal to 0.035% but smaller than or equal to 0.045% of P, less than or equal to 0.003% of S, 0.5%-0.6% of Cr, 0.015%-0.025% of Ti, 0.0005%-0.00015% of Mg, 0.02%-0.05% of Alt, less than or equal to 0.0040% of N, and the balance Fe and inevitable impurities, specifically, Mn/Si is 5-30. The hot-rolled biphase steel plate is mainly applied to manufacturing car rims.

The invention discloses a checkered plate roller. The surface of the roller is provided with lentil-shaped figure pressing grooves and is characterized in that the opening edge of each figure pressing groove is composed of two arcs which are symmetrical to each other, the opening lengths of the figure pressing grooves range from 30 mm to 35 mm, the opening widths of the figure pressing grooves range from 5 mm to 10 mm, the bottoms of the figure pressing grooves in the length direction are of an arc shape, an included angle between the two groove ledge surfaces in each figure pressing groove ranges from 80-85 degrees and the bottoms are smoothly connected by arcs with radii of 1.5-3.5 mm, and the largest depths of the bottoms of the figure pressing grooves range from 4-5 mm. According to the checkered plate roller and a using method thereof, the single engraved roller using times of the checkered plate special roller are increased and the roller consumption is reduced by optimizing the parameters of the figure pressing grooves of the checkered plate roller and the using technology of the roller.

The invention relates to the field of concrete, and particularly discloses mass concrete as well as a preparation method and application thereof. The mass concrete is prepared from the following raw materials in parts by weight: 340-355 parts of cement; 40 to 45 parts of fly ash; 100 to 110 parts of mineral powder; 680 to 720 parts of fine aggregate; 1080 to 1100 parts of coarse aggregate; 7-9 parts of a water reducing agent; and 135 to 145 parts of water. The preparation method comprises the following steps: weighing the cement, the fly ash, the mineral powder, the fine aggregate and the coarse aggregate in proportion, and uniformly mixing and stirring to obtain a first mixture; and weighing the water reducing agent and the water according to the proportion, adding the weighed water reducing agent into the water, uniformly mixing, adding the water doped with the water reducing agent into the first mixture, and uniformly stirring to obtain the mass concrete. The mass concrete has the advantages that the crack generation probability is reduced, and the crack generation amount is reduced.

The invention discloses a 630 MPa-grade tensile strength hot-rolled steel plate for a wheel and a manufacturing method thereof. The hot-rolled steel plate and the manufacturing method thereof mainly solve the technical problems that the tensile strength of an existing hot-rolled steel plate for the car wheel is low, the manufacturing cost is high, and the fatigue performance of the wheel is insufficient after the car wheel is manufactured by using the existing hot-rolled steel plate. The hot-rolled steel plate comprises the chemical components of, by weight, 0.05%-0.07% of C, 0.10%-0.15% of Si, 1.25%-1.45% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.025%-0.035% of Nb, 0.045%-0.055% of Ti, 0.0005%-0.0015% of Mg, 0.02%-0.05% of Alt, less than or equal to 0.0040% of N and the balance Fe and inevitable impurities, wherein the content of the elements needs to satisfy the requirement that the carbon equivalent is less than or equal to 0.35%. The hot-rolledsteel plate is mainly used for manufacturing a car spoke.

The invention provides a connecting structure and method for the joint of new and old concrete members. The connecting structure for the joint of the new and old concrete members includes a new concrete member and an old concrete members which are oppositely arranged; a construction joint exists between the new concrete member and the old concrete member; first stressed steel bars are horizontallyembedded in the old concrete member, and second stressed steel bars are horizontally embedded in the new concrete member; the first stressed steel bars and the second steel bars are all used for supporting the new concrete member; the first stressed steel bars and the second stressed steel bars are coaxially connected through steel bar connectors, and the steel bar connectors are embedded in theold concrete member and the end parts of the steel bar connectors are exposed on the wall surface, opposite to the new concrete member, of the old concrete member; water expansion water stop strips are arranged on the wall surface, opposite to the new concrete member, of the old concrete member; and concrete is poured into the construction joint between the new concrete member and the old concretemember through a grouting duct and a grouting pipe. The connecting structure and method for the joint of the new and old concrete members is suitable for situations that the buried depth is large, the groundwater level is high, and the construction joints are influenced by the groundwater environment for a long time.

The invention discloses a forging process of an external star wheel provided with a handle, and relates to the technical field of forging. The forging process comprises the following specific steps ofblanking, heating, sub-heat extrusion, stage-by-stage cooling, and cold finishing, wherein sub-heat extrusion comprises a pre-formation stage and a finish-forging formation stage. Stage-by-stage cooling comprises initial-stage cooling, middle-stage cooling and later-stage cooling. The forging process has the effects that a forging can be uniformly cooled, and the probability of cracks of the forging is lowered.

The invention discloses a preparation process of an Al-Si-Mg-B-Mn casting alloy with an excellent flowing property, wherein the Al-Si-Mg-B-Mn casting alloy is prepared from the following components including, by mass, 6.50 to 7.50 percent of Si, 0.25 to 0.45 percent of Mg, 0.02 to 0.03 percent of B, 1.50 to 2.00 percent of Mn, less than or equal to 0.12 percent of Fe, 0.10 to 0.20 percent of Ti and the balance aluminum. According to the preparation process, the microstructure and performance of the Al-Si alloy are improved through the technological processes of burdening, smelting and casting, heat treatment and the like, the fluidity of the alloy is improved while higher strength and hardness can be ensured, the cost is reduced, and the Al-Si alloy can be widely applied to the manufacturing industry of automobile parts.

The invention relates to a reinforced full-blocking-eave bollard used for wharves and ship locks. The reinforced full-blocking-eave bollard is provided with a base plate, a bollard body and a full-blocking eave. A plurality of anchor bolt countersinks are formed in the base plate, a top hole is formed in the top of the full-blocking eave, the bollard and the full-blocking eave are respectively of a cavity structure, the standard wall thickness of the bollard body is designed to be t, and accordingly the wall thickness of the blocking eave is 0.75t. The reinforced full-blocking-eave bollard is characterized in that a cavity of the bollard body is a conical cavity, the inner diameter D1 of a lower end opening of the cavity of the bollard body is equal to the outer diameter D-2t of the bollard body, and the inner diameter D2 of an upper end opening of the cavity of the bollard body is equal to the outer diameter D-1.5t of the bollard body. A cavity is formed in the base plate, the wall thickness of the top face of the cavity of the base plate is kept to be t, and the lateral wall thickness is larger than or equal to t. A reinforcing table is arranged at the position, located in each anchor bolt countersink, of the cavity of the base plate. The reinforced full-blocking-eave bollard overcomes the casting defects that an existing full-blocking-eave bollard is unreasonable in structural design and shrinkage, contraction cavities, cracks and the like are prone to being generated, solves the problem that material waste is high, and is mainly used in the places such as the wharves and the ship locks for ship cable mooring.

The invention discloses an anti-corrosion reinforcing structure for a column. The column comprises concrete and main steel bars arranged in the concrete. Joint mixture releasing blocks are arranged in the concrete of the column and internally provided with cavities, and joint mixtures are packaged in the cavities. When cracks appear in the column, the joint mixture releasing blocks crack, and the cracks are filled with the joint mixtures. By means of the anti-corrosion reinforcing structure, the problem that the service life of a column is shortened due to the fact that internal steel bars are corroded easily after cracks appear in the reinforced concrete column in the prior art is effectively solved; the anti-corrosion reinforcing structure has an automatic crack filling function after cracks appear in the column, meanwhile, the possibility of crack occurrence in the column is greatly lowered through the reinforcing structure, and therefore the service life of the column is greatly prolonged; and the anti-corrosion reinforcing structure has high practical value.

Relating to the technical field of caulking agents, the invention discloses a decorative caulking agent and a preparation method thereof. The decorative caulking agent comprises the following raw materials: 55-60 parts of water absorbent resin, 45-47 parts of modified vegetable oil, 38-39 parts of waste porcelain powder, 32-33 parts of redispersible latex powder, 28-29 parts of paraffin phase change microspheres, 21-23 parts of citric acid, 15-17 parts of plant dehydrated fiber filament, 12-14 parts of a colorant, 20-23 parts of assistants and 57-65 parts of water. The decorative caulking agent provided by the invention has decorative effect and certain aesthetics, and excellent crack resistance, overcomes the shortcomings of existing caulking agents, and prolongs the service life of itself and tiles.