86results about How to "Increased deformation resistance" patented technology

The invention provides 780MPa-level ultrahigh-strength Fe-Mn-Al-C lightweight cast steel and a preparation method thereof. The low-density cast steel comprises, by mass, 0.80-1.30% of C, 15.00-20.00%of Mn, 3.50-8.00% of Al, 0.05-0.25% of Si, 0.5-1.5% of Cr, 0.01-0.06% of Cu, 0.30-0.80% of Mo, 0.05-0.20% of V, 0.01-0.10% of Nb, 0.005-0.025% of Ce, less than or equal to 0.01% of P, less than or equal to 0.01% of S, less than or equal to 0.01% of N, and the balance Fe and unavoidable impurities. Meanwhile, the weight percentage ratio of Mn to Al is no less than 2.5% and no more than 3.0%, and the sum of the weight percentages of Nb and V is no less than 0.10% and no more than 0.20%. The preparation process is simple and free of rolling, and the method can be used for manufacturing automobilestructure castings with complex shapes.

A method for improving deformation and permeability in the high-thickness standard steel plate hot rolling process is characterized in that a uniform fast cooling device is arranged at a position close to the opening of a heavy and medium plate mill or hot strip roughing mill with the length being 5 to 15 meters and the cooling total water being 3,000 to 6,000 cubic meters per hour respectively; before rolling, the cooling device conducts asymmetrical uniform fast cooling to the upper and lower surfaces of a plate blank, a low-temperature hardened layer is formed on the surface of the plate blank, the temperature gradient of a core reaches 2 to 3 DEG C per millimeter, before the cooling returns red, the cooling device can quickly enter the mill to conduct differential temperature rolling, and plate blank core deformation is improved; the cooling device is further combined with asymmetrical rolling, while deepening the plate blank core deformation, the cooling device solves the warping problem caused by the asymmetrical rolling through the asymmetrical cooling of the upper and lower surfaces of the plate blank before rolling. For a steel ball needing two-stage control, the uniform fast cooling device can replace a middle cooling device, shortens or even eliminates the temperature waiting time of swinging steel, and improves the production efficiency.

This invention relates to the field of fire-fighting equipment, specifically to means of fire fighting by a fire-extinguishing aerosol that is formed during burning of pyrotechnical composite and a method of its production. The invention allows to prepare pyrotechnical, aerosol-forming fire-extinguishing composite with good deformation strength characteristics, low fire-extinguishing concentration and regulate burning velocity. The pyrotechnical aerosol-forming fire-extinguishing composite contains an oxidizer, a production process additive and burning binder formed by thermoplastic formaldehyde and phenol polycondensate, plasticized by dicarboxylic acid ester and reinforced by polytetrafluoroethylene. The method of producing the composite consists of mixing of formaldehyde and phenol polycondensate suspension in an organic solvent and polytetrafluoroethylene dispersion in dicarboxylic acid ester, mixing the resulting composition with an oxidizer and a production process additive with subsequent thermomechincal effect. The invention can be used for fire-extinguishing in different structures and devices without harmful effect on human body and living organisms, nature.

The invention belongs to the field of high-entropy alloy and high temperature resistance alloy, and particularly relates to a (NbMoTaW)100-xMx series refractory high-entropy alloy and a preparation method of the (NbMoTaW)100-xMx series refractory high-entropy alloy. The chemical ingredient of the alloy is (NbMoTaW)100-xMx (0<X<=5%), M is one or two of B, C and O, and the content of each element except for the element M is not smaller than 5% and is not higher than 35%. The preparation method comprises the steps that impurities such as surface scale in needed raw materials are removed, and weighing is carried out according to the atomic ratio; and alloy ingredients are smelted into a cast ingot through vacuum electric arc melting. The high-entropy alloy has the good plasticity at room temperature, meanwhile has the excellent high temperature strength and plasticity, can be used for high temperature structural parts and the like in special working condition environment, and has the wideapplication prospect in the high temperature field.

The invention discloses a heat treatment technology of an alloy spring cold-rolled steel strip 51CrV4 of an automobile clutch diaphragm. According to the heat treatment technology, blanks are subjected to cold-rolling deformation for nine times and annealing heat treatment for three times, the temperature of a heating section is controlled, the cooling temperature and speed are controlled, the atmosphere in a heating furnace is heated and subjected to thermal insulation in a non-oxidation state in the cold-rolling and annealing heat treatment processes, and an oxidized grain boundary and a decarburized layer are avoided. With the adoption of the scheme, the production cost is reduced, and the product performance meets the international standard.

The invention relates to the technical field of metallurgy, in particular to a preparation method of an equal-thickness ultrafine grain TC4 titanium alloy plate. The preparation method comprises the steps that S1, plate blanks obtained after rolling and annealing are taken; S2, the plate blanks are grouped; S3, interfaces of the plate blanks are subjected to roughening treatment and cleaning, and then the following operation of S4 is executed on each group; S4, the plate blanks in each group are stacked into a plate layer, one side edge of each plate layer is welded, the other side edges of each plate layer are coated with anti-oxidation coatings, or all edges of the plate layers are subjected to vacuum seal welding, the hot rolling process is adopted for ply rolling and welding, final hot rolling is carried out till the thickness of the plate layers is equal to the original thickness of the plate blanks, and then air cooling is carried out; S5, if the plate layers need to be grouped again, the plate layers serve as new plate blanks to return to the step S2, and otherwise all the plate layers form a plate blank group to return to the step S3 till all the plate blanks are subjected to ply rolling into the plate; S6, the plate is subjected to heat treatment and then cooled. According to the method, the defects of the insufficient hot rolling deformation and deformation cracking and incomplete welding in the ply rolling process can be overcome, and the equal-thickness ultrafine grain plate can be prepared.

The invention belongs to the technical field of preparing of a deformation high-temperature alloy GH4169 disk forge piece for an advanced aero-engine, and relates to a method for reducing the internalresidual stress of a GH4169 alloy large-size disk forge piece. The method includes the following steps of preparing a GH4169 alloy pure smelting cast ingot, conducting uniform heat treatment on the GH4169 cast ingot, cogging the cast ingot, preparing a biscuit, conducting compounding and coating, conducting gradient-speed-control constant-temperature die forging, conducting heat treatment on thedisk forge piece, conducting rough machining and conducting stress relief annealing. By means of the prepared low-stress GH4169 alloy disk forge piece, it is ensured that the internal stress of the deformation high-temperature alloy cast ingot is slowly released, the internal metallurgical quality of the alloy ingot is improved, and the disk forge piece can be used for preparing an advanced aero-engine high-pressure compressor disk, a high-pressure turbine disk, a low-pressure turbine disk and other parts.

The invention discloses a grinding disc casting which is even in rigidity, good in stability and cutting performance, durable and high in quality and a grinding disc casting mold for manufacturing the grinding disc casting. The mold is reasonable in structural design and good in heat preservation and exhausting performance. The invention further aims to disclose a grinding disc molding process. The product quality level can be greatly improved, after-treatment cost can be reduced, and after-treatment time can be shortened. A grinding disc manufactured through the molding process is good in product quality and high in percent of pass.

The invention relates to a preparation method of a large titanium-cathode roller. The method comprises the following steps of: rolling by adopting a thick titanium plate; after welding, heating a welding line and a welding line heat-affected zone needing heating at 750-980 DEG C for 0.2-2 hours by adopting a medium-frequency induction device; hammering or pressing and rolling the welding line on a rolling mill by a heavy roller to deform a welding line layer with a material deformation degree of 10-20 percent; heating and pressing the welding line heat-affected zone twice to four times; recrystalizing and annealing at 750-850 DEG C for 1-2 hours; and cooling a furnace. The heating and recrystallization of a cathode roller before rolling at a controlled lower heating temperature has great deformation resistance to cause defects and deformation and causes heavy-layer crystal grains only on a surface layer, and the heavy-layer crystal grains can be thinned.

The invention provides a radial forging method for forming a short lead screw of an inverted planetary roller screw pair. The radial forging method for forming the short lead screw of the inverted planetary roller screw pair includes the steps that a radial forging die is provided with a thread form segment and a gear form segment simultaneously; a workpiece is rotated, the radial forging die conducts blow forging and then is lifted up, and the mentioned steps are continuously repeated until radial forging forming of the short lead screw with the specified radial forging amount is completed; forming and manufacturing of the short lead screw is completed through one pass or multiple passes; plastic forming of threads and gears of the short lead screw are completed simultaneously, a thread segment and a spline segment of the formed and manufactured short lead screw are integrated. The forming and manufacturing time is short, the part reliability is high, and the mechanical strength is high; through the method, large-diameter thread and gear coaxial parts with similar features can also be formed; the method is combined with a medium-high-frequency induction heating method, the parts made of materials with large deformation resistance, high hardness and hard deformation can be formed.

The invention discloses a novel MPP power cable sheath pipe, which consists of the following raw materials by weight: 8-12 parts of polypropylene, 3-7 parts of polyethylene, 15-25 parts of active calcium carbonate, 1-10 parts of glass fiber, 0-1 part of a coupling agent, 0.1-0.5 part of an antioxidant, and 0.3-1 part of a lubricant. The MPP power cable sheath pipe provided by the invention has strong chemical stability and corrosion resistance, good mechanical properties, and high compressive strength, and can play a very good protective role to the cable. Pipe connection can adopt a variety of ways so as to maximumly facilitate on-site construction, and the cable threading protection sheath pipe has excellent comprehensive performance, and can reach good protection and anti-ageing effect on cable. The MPP power cable sheath pipe has anti-deformation strength increased by 30%, welding joint tensile strength increased by 70%, and a non-excavation drag corner up to 60%.

The present invention is hydraulic needle plate and its manufacture process. The hydraulic needle plate is manufactured with bronze and through machining and ageing treatment, or with pure titanium and through machining and surface nitridation treatment. The hydraulic needle plate has high surface hardness, long service life, good machining performance and low manufacture cost.

The invention provides a novel and continuous phenolic resin bamboo plywood manufacturing process; the preliminary bamboo decomposition and processing as well as unit desugaring and drying and phenolic resin glue application stages are the same with those of a bamboo plywood production process of the prior art, while the pressurization, the formation, the curing, the heating and the pressure maintenance of bamboo plywood materials are carried out on different equipment, wherein the pressurization of the bamboo plywood materials is carried out on a press on which no heat source needs to be fed in; meanwhile, a special clamp is adopted to maintain the pressure; the formation and the curing of the bamboo plywood materials are carried out in a tunnel-type baker; and a roller conveying device continuously conveys the bamboo plywood during a pressure maintenance process, so that the technical practice in the hot pressing and formation and curing stages in the bamboo plywood production is changed with less investment.

The invention discloses a structure-optimized drill rod on a spiral drilling machine. A rod body of the drill rod is composed of a spline shaft, a drill bit and a double-screw bolt. The drill bit and the double-screw bolt are formed at the upper end and the lower end of the spline shaft respectively. A spline sleeve is inserted into the spline shaft. A spiral blade is fixedly welded to the outer wall of the spline sleeve. A rib groove for extending a spiral line of the spiral blade is formed in the spiral blade. A spiral water conveying pipe is welded into the rib groove of the spiral blade. A water pipe joint is fixedly connected to the upper end of the water conveying pipe. A spiral guide round rod is fixedly welded to the lower end of the water conveying pipe and fixedly welded into the rib groove in the lower end of the spiral blade. Inclined guide angles are formed at the bottom end of the guide round rod and the bottom end of the spiral blade. A plurality of water outlet holes are formed in the wall of the lower end of the water conveying pipe. The spiral blade of an existing spiral drilling machine is modified, the rib groove is additionally formed to enhance strength of the spiral blade, the spiral blade is provided with an output pipe, the output pipe can be used when the spiral drilling machine sprays water, and abrasion to the spiral blade can be reduced.

The invention discloses an alloy component of a low-cobalt high-temperature alloy supercharging turbine. The chemical composition of the alloy comprises the following chemical elements by mass percentage: 0.08-0.16% of C, 12.00-15.00% of Cr, 5.00-7.00% of Mo, 1.00-3.00% of Co, 5.00-5.70% of Al, 1.20-1.70% of Ti, 2.00-2.50% of Ta, 6.00-8.00% of W, 0.01-0.2% of B and the balance Ni. The compositionof Cr, Mo, W in the alloy is controlled as following: the specific value between the sum of the mass fraction of the W element and the Mo element to the mass fraction of the Cr element is less than 1.0. The invention further discloses a preparation method of the low-cobalt high-temperature alloy supercharging turbine, and belongs to the technical field of automotives. By means of the alloy component, the strategic scarce resources Co are saved greatly, and meanwhile, the obtained supercharging turbine is not prone to hot-cracking.

The invention provides an online tons-level traditional Chinese medicine anti-wall-hanging evaporation and concentration device and an operating method thereof. A gas-liquid-solid three-phase natural circulation fluidized bed evaporation and concentration device in an industrial production scale in which the heating area of a heater is 18.9 m<2> and the evaporative power is 1100-1400 kg/h is determined. The inventions and innovations of a screen type discharging device, a 90-degree multi-section short-radius elbow connecting pipe and a demister on the upper part of a separation chamber are designed. At present, the production operation result of the industrial scale device of about 100-ton extracting solutions of Menopause Ease and other over ten traditional Chinese medicines proves that compared with a traditional two-phase flow evaporation concentrator with the heating area of 18 m<2> in a factory and an operating method thereof, the device and the method under approximate operation conditions have the advantages that the total heat transfer coefficient and evaporation intensity are improved, a wall hanging phenomenon of the two-phase flow evaporation concentrator is avoided, the wall hanging phenomenon existing in a traditional Chinese medicine extracting solution evaporation concentrator is eliminated, and high-efficiency continuous and stable operation is realized.

The invention provides a forging technology of a high-strength TC4 titanium alloy column part. The forging technology comprises the specific steps of material feeding, blank turning, heating before forging, tool and die preheating, first time of upsetting, drawing, second time of upsetting, thermal treatment and quality inspection. According to the forging technology, because of the transformationprocess of upsetting, drawing and upsetting, the deformation in the forging process is increased, and the forging process route is reasonable. According to the forging technology, during the processof drawing, because the section of a blank bar is set to be a hexagon, or heptagon or octagon, no over protruding edges are formed in corners, the temperature gradient between different positions on the surface of the blank bar is decreased, deformation is more uniform when load is applied, and the surface quality of a forge piece is better. According to the forging technology of the high-strengthTC4 titanium alloy column part, in the process of the second time of upsetting, both the hammer drop speed and hammer drop force are larger than those of the first time of upsetting; before the second time of upsetting, the temperature of the blank bar is low, at this time, large axial deformation ranging from 30% to 50% is applied to the blank, a long-strip shaped alpha phase can be promoted tobe broken, and the shape characteristics of a Widmannstatten structure is effectively changed.

The invention discloses an environment-friendly flame-retardant straw plate. The environment-friendly flame-retardant straw plate is prepared from crop straw, bamboo charcoal fibers, glutinous rice flour, an aluminic acid ester coupling agent, polyanionic cellulose, diatomite, a magnesium hydroxide flame retardant, silica fume and deionized water. The straw plate has the high strength, the flame retardant property is good, various properties all meet the corresponding requirements, green and environmental protection are achieved, zero formaldehyde emission is achieved, the oxidation resistanceis high, the mass is low, the high additional value of the crop straw is increased, straw burning and tree cutting are reduced while the production cost is reduced, and the market application prospect is very wide.

The invention provides a large-diameter anti-cracking PE pipe. The large-diameter anti-cracking PE pipe comprises a pipe body, wherein the pipe body is made of polyethylene materials, a barrel-shaped reinforcing layer is arranged in the middle of the pipe wall of the pipe body, the reinforcing layer is formed in a way that a metal net is rolled, six to eight inner reinforcing strips which are made of steel wires of which the diameter is 3 to 5 mm are arranged on the inner side of the reinforcing layer and are uniformly distributed along the length direction of a pipeline, outer reinforcing strips which are made and formed by bamboo strips or steel bands are arranged on the outer side of the reinforcing layer, concave-convex surface reinforcing ribs are arranged on the surface of the pipe body, and steel wires of which the diameter is 2 mm are arranged in the surface reinforcing ribs. By adopting the scheme, the large-diameter anti-cracking PE pipe has the advantages of reasonable structure and good anti-cracking and anti-deformation effects and is especially suitable for large-diameter pipelines above 0.8 meter.

The invention discloses an auxiliary jig for polishing of side of a light guide plate. The jig comprises a rear clamping plate, a plurality of insertion plates are fixed to the two sides of the front end face of the rear clamping plate, the front ends of the insertion plates penetrate through a front clamping plate to be fixed to a positioning plate, and a plurality of fastening bolts are connected with the positioning plate through threads; the two side edges of the rear clamping plates are fixedly provided with vertical racks, the rack on one side of the rear clamping plate is meshed with a driving gear and a driven gear, the rack on the other side of the rear clamping plate is meshed with a driven gear, the driven gears and the driving gear are fixed to hinge shafts in an inserted and sleeved mode, the two ends of each hinge shaft are hinged to side plates respectively, the upper ends of the side plates are fixed to connection blocks, the lower ends of the side plates are fixed to connection bases, and the bottom ends of the connection bases are fixedly connected with magnet suction cups; one end of the portion, on the driving gear, of the corresponding hinge shaft is fixedly connected with a rocker. The jig is simple in structure, assists a manual polishing light guide plate in use, brings convenience to manual polishing, and can effectively improve polishing safety.

The invention provides a top plate and back plate integrated structure and a side draught range hood. The top plate and back plate integrated structure comprises a top folding edge, a top plate, a back plate, a bottom plate and an oil baffle plate which are integrally formed in sequence, the front end of the top plate is connected with the top folding edge, the rear end of the top plate is connected with the upper end of the back plate, the rear end of the bottom plate is connected with the lower end of the back plate, the front end of the bottom plate is connected with the lower end of the oil baffle plate, and the side draught range hood comprises the top plate and back plate integrated structure. According to the top plate and back plate integrated structure, the top folding edge, the top plate, the back plate, the bottom plate and the oil baffle plate are arranged to be a structure which is integrally formed, so that structures for assembling and connecting the top folding edge, the top plate, the back plate, the bottom plate and the oil baffle plate are omitted, then integrally manufactured materials are saved, and the overall attractiveness is also improved; and the integralforming process is simple, the processing is convenient, and screw driving or welding does not need to be carried out among the top folding edge, the top plate, the back plate, the bottom plate and the oil baffle plate during subsequent assembling, so that the assembly efficiency is improved.

The invention discloses a preparation method of a mildewproof, mothproof and bacteriostatic straw plate. The preparation method comprises the following steps: smashing crop straws into particles, soaking the particles in sodium hydroxide solution and sulfuric acid solution to obtain straw fibers, mixing the straw fibers with rosemary powder, bamboo charcoal fiber, expanded vermiculite and kieselguhr separately to obtain a surface layer mixture, mixing the straw fibers with coconut carbon fiber and green bean starch to obtain a core layer mixture, paving the surface layer mixture into a die according to the odd number layer principle, paving the core layer mixture into the die according to the even number principle, and carrying out drying, thermo-compression formation, cooling, demoulding,maintaining, edge cutting and packaging to obtain a finished product. The mildewproof, mothproof and bacteriostatic straw plate is non-toxic, tasteless, formaldehyde-free, and environmental-friendly,has higher strength, is high in fireproof performance and humidity resistance, is light in weight, facilitates transportation and construction installation and can enhance memory and refresh throughrosemary. Various performance of the mildewproof, mothproof and bacteriostatic straw plate meets corresponding requirements. Furniture made of the mildewproof, mothproof and bacteriostatic straw platecan effectively prevent mildew, acarid, resist bacteria and can automatically adjust the indoor humidity.