73results about How to "Improve processing plasticity" patented technology

The invention discloses micro-alloying seamless pipeline steel and process for preparation. According to weight percentage, the range of the chemical components of the invention includes that C holds 0.08% to 0.20%, Si is equal to or less than 0.04%, Mn takes 0.60% to 1. 50%, S is equal to or less than 0.015%, P is equal to or less than 0.025%, Al is equal to or less than 0.04%, Ti is equal to or less than 0.04%, H is equal to or less than 2.5*10-4%, O is equal to or less than 25*10-4%, the rest is Fe and unavoidable foreign matters. The process for preparation comprises technique steps, including smelting, refining, continuous casting, hot rolling and slow cooling. Round steel with the size of phi 70 to 150 millimeters can be produced by the process for preparation. The seamless pipeline steel of the invention has perfect anti-sulphide stress corrosion (SSC resistance) capability and anti-HIC property. The pipeline steel which can substitute for welding pipe can be utilized in the filed of oil pipeline and the like, and the invention increases the reliability of material and adaptability of variety, in particular being adaptable for the low submarine temperature and corrosion-resistant environment and for manufacture of thick-walled tubes.

The invention discloses an aluminum alloy semi-ring for a fairing of a launch vehicle and a preparation method thereof, relating to an alloy semi-ring and a preparation method thereof. The invention solves a problem that the traditional aluminum alloy semi-ring for the fairing of the launch vehicle has a low intensity and cannot satisfy the application requirements of large-scale launch vehicles. The aluminum alloy semi-ring for a fairing of a launch vehicle is made of Si, Fe, Cu, Mn, Mg, Ni, Zn, Ti and Al. The tensile strength of the semi-ring is 380-450MPa, the percentage elongation after fracture is 6.0-10% and the Brinell hardness is 110N/sq.m-150N/sq.m. The preparation method comprises the following steps of: preparing the raw material, melting, casting, homogenizing annealing, forging, extruding, bending, quenching, coldly compressing to deform, flattening and ageing the raw materials to obtain the aluminum alloy semi-ring for the fairing of the launch vehicle. The aluminum alloy semi-ring for the fairing of the launch vehicle has a high intensity and can be applied to the large-scale launch vehicle.

The invention discloses an oil-resistant anti-aging rubber cable material which is prepared from the raw materials including, by weight, 3-4 parts of vinyl phenyl silicone oil, 5-7 parts of chlorosulfonated polyethylene powder, 4-5 parts of sulfur, 2-3 parts of palm wax, 7-9 parts of steel wool fiber, 16-20 parts of fluoro-rubber, 12-14 parts of barite powder, 7-9 parts of carbon black, 2-3 parts of ascorbyl palmitate, 2-3 parts of emulsified methyl silicone oil, 0.5-1 part of triphenyl phosphate, 45-56 parts of styrene-butadiene rubber, 55-60 parts of chloroprene rubber, 55-70 parts of natural rubber, 30-40 parts of hollow glass micro beads, 3-5 parts of polytetrafluoroethylene, 1-1.3 parts of a silane coupling agent kh550, 12-16 parts of epoxy resin E44, 0.06-0.1 parts of diethylene triamine, 0.1-0.2 parts of an accelerator M, 2.6-3 parts of a silane coupling agent kh570, and a proper amount of distilled water. The cable material is excellent in mechanical performance, is not liable to cause circuit fault and is valuable to promote.

The invention relates to the improvement of non-halogen low-smoke inflaming retarding polyolefine, which is characterized in that 20-70 parts of PE, 30-80 parts of EVA, 80-110 parts of Mg(OH)2, 30-55wt% of surface active agent, 45-70wt% of fatty acid soap and/or 2-5 parts of dispersant consisting of palmitic acid soap and/or oleate soap, and 5-15 parts of RP. Compared with the prior art, the inflaming retarding polyolefine can obviously increase the dispersive performance of inorganic flame retardants and the binding ability with binders, greatly reduces the use level of the flame retardants which is only about 1/2 of the former; the elongation at break thereof can reach as much as 550 and the index of swealing is more than or equal to 20; the non-halogen low-smoke inflaming retarding polyolefine increases the plastic working of materials, reduces the stress of a molding heat machine, basically removes the influence of the inorganic flame retardants on the elongation at break and the index of swealing reduction, and effectively solves the foundation reason of the cracking; secondly, the density of the polyolefine is low and not more than 1.29; the cost can be reduced by 10-20%. The non-halogen low-smoke inflaming retarding polyolefine not only can be used in various inflaming retarding soft product products, in particular to be used as cable insulation and/or a sheath, and effectively solves the industry long-standing problem that the inflaming retarding polyolefine insulation and the sheath easily crack.

The invention discloses an Al-Mg-Si series aluminum-alloy material with long-time natural aging stability. The Al-Mg-Si series aluminum-alloy material contains the chemical elements in percentage by mass: not lower than 0.3% and not higher than 0.6% of Mg, not lower than 0.8% and not higher than 1.2% of Si, not lower than 0.05% and not higher than 0.15% of Mn, higher than 0 and not higher than 0.03% of Cu, higher than 0 and not higher than 0.12% of Fe, higher than 0 and not higher than 0.05% of Ti, either not lower than 0.05% and not higher than 0.15% of Ca or not lower than 0.05% and not higher than 0.15% of Sr and the balance of Al and other unavoidable impurities. The invention further discloses an aluminum-alloy plate manufactured from the aluminum-alloy material. The invention further discloses a manufacturing method of the aluminum-alloy plate, wherein the method comprises the steps of smelting, casting, carrying out homogenizing heat treatment, carrying out face milling, rolling, carrying out online solid solution treatment and carrying out online aging pretreatment. The aluminum-alloy material and the aluminum-alloy plate, disclosed by the invention, are high in strength and good in natural aging stability.

A soft rubber cable material is disclosed. The cable material is prepared from 3-4 parts by weight of tetrabromobisphenol A, 8-11 parts by weight of aluminum hypophosphite, 13-16 parts by weight of ceramic powder, 16-20 parts by weight of carbon black, 55-60 parts by weight of chloroprene rubber, 58-64 parts by weight of silicone rubber, 3-4 parts by weight of bismaleimide, 55-70 parts by weight of natural rubber, 30-40 parts by weight of hollow glass micro beads, 3-4 parts by weight of poly(ethylene oxide), 1-1.3 parts by weight of a silane coupling agent kh550, 2-3 parts by weight of paraffin oil, 3-4 parts by weight of stearic acid, 3-4 parts by weight of hydroxyl silicone oil, 2-3 parts by weight of DCP, 2-3 parts by weight of dioctyl phthalate, 12-16 parts by weight of epoxy resin E44, 0.06-0.1 part by weight of diethylenetriamine, 0.1-0.2 part by weight of an accelerant DA, 2.6-3 parts by weight of a silane coupling agent kh570 and a proper amount of distilled water. The cable material prepared is good in flame retardance and wear resistance, improved in processing performance, increased in toughness and not liable to be fractured and deserves popularization.

The invention discloses a lost foam casting method comprising the steps of 1. taking foam as a material, molding a foam die which is the same as a cast in shape, preserving a sprue gate on the foam die; 2. coating a high-temperature-resistant poromeric material on the foam die, and baking for 4-7 hours in the environment below 45 DEG C; 3. paving roughing sand on the foam die, carrying out three-dimensional ramming filling from the periphery to the middle so as to discharge gas in the sand; 4. casting inwards from the sprue gate under the effect of negative pressure; and 5. cleaning shakeout to obtain the cast. The foam die is taken as a casting mold, so that on one hand, the problem that the metal die casting mold is difficult to process is solved; and on the other hand, the problem that the sand die casting mold is not easy to mold is solved. The foam die can be produced by batch due to the plasticity that the foam die is easy to process. Therefore, the casting mold is high in processing efficiency, and the material and device costs in the molding process of the foam die are low. Thus, the production cost also can be effectively reduced in comparison with the entire casting process.

The invention provides a modified polyvinylidene fluoride (PVDF) material used for solar cell protective films and a preparation method thereof. The material comprises: 55-70% of PVDF, 10-20% of high density polyethylene (HDPE), 3-6% of polyethylene grafted maleic anhydride, 10-20% of an ethane-octylene copolymer, 0.3-0.6% of an anti-oxidant, and 0.2-0.5% of a lubricant. The preparation process consists of: first adding each component material into a high speed mixing bucket according to the ratio for uniform mixing; adding the obtained mixture into a double-screw extruder for mixing; controlling the extrusion temperature of the first and second segment of the double-screw extruder composed of six segments at 150-170DEG C, and controlling the extrusion temperature of the other segments at 170-200DEG C; leaving the reactant to stay in the double-screw extruder for 3-6min totally, and keeping the rotating speed of the double-screw extruder at 300-350r.min<-1>; conducting cooling and pelletizing to the obtained material after extrusion, thus obtaining the modified polyvinylidene fluoride material used for solar cell protective films. The adding of HDPE into PVDF for modification can obviously reduce the crystallization degree of PVDF, and enhance the processibility of PVDF.

The invention discloses an ion wind air purifier with an inner cavity easy to clean. The ion wind air purifier comprises a shell and a purification device for purifying air. An inner cavity lining is arranged between the inner wall of the shell and the purification device. The inner cavity lining is detachably connected with the inner wall of the shell. The purification device comprises a first purification filtering device and a second purification filtering device. The first purification filtering device and the second purification filtering device are arranged inside the inner cavity lining in a staggered mode and assembled with the inner cavity lining through a locking and releasing mechanism or connected with the inner cavity lining in a pluggable mode. The ion wind air purifier is ingenious in design and simple in structure, due to the fact that the inner cavity lining and the purification filtering devices inside the purifier are all of a detachable structure, detaching and cleaning can be conducted conveniently when pollutants adhere to the inner wall of the inner cavity lining, and accordingly the operation effect of the whole air purifier is guaranteed; and in addition, the inner cavity lining can be replaced conveniently when the inner cavity lining is damaged or cannot be washed.

The invention relates to a multi-silver brazing filler metal containing manganese and tin, which consists of Ag, Cu, Sn, Mn, Ni and Zn, wherein the weight percentages of all the components are as follows: 19-22.5 wt% of Ag, 28-36 wt% of Zn, 36-40 wt% of Cu, 1.0-3.0 wt% of Sn, 3.5-6.5 wt% of Mn, 0.5-2.0 wt% of Ni, and 0.01-0.3 wt% of microelement R; and the microelement R is one of lanthanum, cerium and silicon, or consists of more than one of the three. The invention further comprises a preparation method of the multi-silver brazing filler metal; a medium-frequency smelting furnace is adopted to smelt and cast; all the components are added for smelting according to the sequence of Ag, Cu, Ni, Sn, Mn, Zn and Cu-R alloy; and then, the multi-silver brazing filler metal is prepared through casting, saw stripping, extrusion, drawing, molding and cleaning processes. Compared with the prior art, the multi-silver brazing filler metal has the following advantages and effects: (1) the multi-silver brazing filler metal can be used for replacing BAg45CuZnCd and Bag45CuZnCd silver brazing filler metals; the silver content is obviously reduced; the performance index parameters are approximate to that of BAg45CuZnCd and Bag45CuZnCd; and the cost performance is excellent; (2) when red copper, brass and stainless steel are brazed, the mechanical performance is excellent; (3) the brazing filler metal is better in processing plasticity; and (4) the product melting temperature is 700-770 DEG C.

The invention provides a copper alloy bar for a high-strength corrosion-resistant wear-resistant valve element. The cooper alloy bar is characterized in that the copper alloy bar comprises, by weight,0.04-0.2% of Si, 0.25-0.6% of Mn, 0.1-0.4% of Sn, 0.06-0.2% of Ni, 0.7-1.3% of A1, 0.1-0.25% of Fe, 83-87% of Cu, 0.01-0.1% of lanthanum and strontium rare earth, and the balance Zn and inevitable trace impurities. The preparation method comprises the following steps of burdening and smelting; refining and removing impurities; degassing; adding lanthanum and strontium rare earth; carrying out horizontal continuous casting; drawing and extending a casting blank; peeling twice; and carrying out light pressing and straightening to obtain a finished product. The copper alloy component is scientific and reasonable in component ratio, and the prepared copper alloy has good machining performance and casting performance; and meanwhile, the alloy is high in strength and good in corrosion resistance and wear resistance, and can be applied to the manufacturing of the valve element of ocean engineering; the preparation process is simple and easy to operate; and the horizontal continuous casting is adopted, so that cracks caused by thermal stress are avoided, and the hot extrusion cracking problem of the casting blank is solved.

The invention discloses a process for preparing a bronze Nb3Sn superconducting wire material. The process comprises the following steps of: drilling a hole on a high tin bronze ingot, assembling the drilled ingot with a niobium alloy rod, soldering and sealing under vacuum, and performing hot extrusion to obtain a rod blank a which serves as a tensile blank; filling the tensile blank in an annealing furnace to perform first annealing; charging a furnace chamber of the annealing furnace with high-purity argon or nitrogen; heating the furnace chamber to the temperature of between 420 and 480 DEG C at the rate of 4 to 8 DEG C/minute; preserving the heat for 30 to 90 minutes; performing forced cooling by circulating the argon or the nitrogen; discharging when the material is cooled to the temperature of between 50 and 100 DEG C; repeatedly processing the material; performing a subcomponent molding process to obtain a hexagonal subcomponent; assembling, soldering and sealing under vacuum and performing the hot extrusion to obtain a rod blank b; and performing second annealing, twisting, performing final stretching and electroplating to obtain the Nb3Sn superconducting wire material. By the process for preparing the bronze Nb3Sn superconducting wire material, the surface of an Nb alloy is improved, and the performance of a strand wire is improved.

The present invention discloses composite Cu/NbZr pipe making process, which includes the following steps: prickling NbZr alloy pipe in mixture solution of hydrofluoric acid and nitric acid in the volume ratio of 1 to 3, prickling Cu pipe in dilute nitric acid solution, dewatering and stoving separately, coating the NbZr alloy pipe onto Cu pipe, drawing the assembled Cu/NbZr composite inside drawing die in one drawing bench in the working modulus of 30-40 %, straightening the drawn composite Cu/NbZr pipe and cutting off two ends to obtain the composite Cu/NbZr pipe. The process is simple and feasible, and the made composite Cu/NbZr pipe has Cu and NbZr alloy interface in metallurgical combination. The composite Cu/NbZr pipe is applied in the superconductive magnesium dibroride wire, and superconductive magnesium dibroride wire in the length over 1000 m may be produced.

The invention discloses 650-DEG C-high-temperature-resistant titanium alloy. The 650-DEG C-high-temperature-resistant titanium alloy comprises, by mass percentage, 5.5%-6.5% of Al, 5.5%-9.0% of the combination of Zr and Sn, smaller than or equal to 0.8% of each of two or more elements of Mo, Nb and Ta, 2%-3% of W, 0.3%-0.4% of Si, 0.05%-0.1% of Y, 0.1%-0.15% of the combination of C and O and the balance Ti and inevitable impurities. The ratio of the mass percentage of Sn to the mass percentage of Zr is 0.5-1, the mass percentage of C is larger than or equal to 0.03%, and the mass percentage ofO is smaller than or equal to 0.09%. According to the 650-DEG C-high-temperature-resistant titanium alloy, the multi-element reinforcement mode is adopted, the high-content Al is added as the Zr alloy element, the Sn alloy element, beta stable elements such as Nb, Mo and Ta, W and Y are added, and therefore the titanium alloy has the high temperature strength and plastic matching performance, andthe comprehensive mechanical properties of the titanium alloy are improved.

The invention provides a weather-resistant halogen-free flame-retardant polypropylene material as well as a preparation method and application thereof. The weather-resistant halogen-free flame-retardant polypropylene material is prepared from the following raw materials in parts by mass: 55-75 parts of polypropylene resin, 20-38 parts of halogen-free flame retardant, 1-3 parts of a flame-retardantsynergist, 0.5-0.8 part of a lubricant, 0.5-1.2 parts of an antioxidant and 0.3-1 part of a light stabilizer; wherein the halogen-free flame retardant comprises microcapsule ammonium polyphosphate and a charring agent. The weather-resistant halogen-free combustion-supporting polypropylene material has a high flame retardant performance (UL94 V-0 and UL1694 SC-0 with a thickness of 0.75 mm), and after being soaked in water at 70 DEG C for 7 days, at least 90% of mechanical properties are still maintained. After the material is irradiated by a xenon lamp for 1000 hours, at least 90% of mechanical properties are maintained. In addition, the preparation method is simple and easy to control. The material is applied to a soft core of decorative lighting.

The invention provides a multi-element solid solution strengthening heat-resistant titanium alloy. The multi-element solid solution strengthening heat-resistant titanium alloy consists of the following components in percentage by mass: 5.5%-6.5% of Al,, 2.5%-3.5% of Sn, 3.0%-5.0% of Zr, 0.3%-0.7% of Nb, 0.3%-0.7% of Mo, 1.0%-2.0% of W, 1.0%-2.0% of Ta, 0.25%-0.45% of Si, 0.03%-0.07% of C and the balance being Ti and other inevitable impurities. The titanium alloy belongs to the multi-element solid solution strengthening heat-resistant titanium alloy, and the room-temperature strength of the alloy subjected to solid solution and ageing treatment meets the following relationship: Rm greater than or equal to 1100MPa, Rp 0.2 greater than or equal to 910 MPa, A5 greater than or equal to 8%; and the strength under a 650-DEGC high-temperature condition meets the following relationship: Rm greater than or equal to 680 MPa, Rp0.2 greater than or equal to 580 MPa and A5 greater than or equal to 20%.

The invention discloses flexible adhesive tape brazing filler metal. The flexible adhesive tape brazing filler metal comprises a dense metal layer, wherein adhesive layers are arranged at two sides of the dense metal layer; release paper layers are arranged on the adhesive layers. Furthermore, the invention further discloses a preparation method of the flexible adhesive tape brazing filler metal; the method comprises the following steps: uniformly applying one layer of adhesive on each of two sides of the dense metal layer; covering one layer of release paper on each adhesive layer. The dense metal layer is a crystalline or amorphous foil strip material. The flexible adhesive tape brazing filler metal disclosed by the invention does not take metal and alloy powder thereof as raw materials, but takes a crystalline or amorphous metal foil strip material as the raw material; almost all metal and alloy soldering flux thereof can be prepared into the adhesive tape brazing filler metal; the flexible adhesive tape brazing filler metal is convenient to use and low in cost, and the brazing performance is equivalent to performances of pure metal and alloy soldering flux thereof; meanwhile, the preparation method has a simple process flow, does not need expensive equipment and is short in preparation period and low in raw material cost, so that the preparation method is worthy of being widely popularized and applied in the field of brazing.

The invention discloses a flame-retardant polypropylene material as well as a preparation method and application thereof. The flame-retardant polypropylene material is prepared from the following rawmaterials in terms of 100 parts by mass: 72-85 parts of copolymerization polypropylene resin, 8-15 parts of brominated flame retardant-antioxidant 1010 compound, 3-6 parts of antimonic flame retardant, 1-3 parts of titanium dioxide, 0.5-1.2 parts of lubricant, 1-2 parts of antistatic agent, 0.5-1.2 parts of antioxidant and 0.3-1 part of antibacterial agent. The flame-retardant polypropylene has agood antistatic effect, has a surface resistance of 108-109 omegas, is high in glossiness, does not produce flame retardant precipitate, has a flame retardant rating of UL94V-0, and has the advantagesof being capable of inhibiting bacterial growth for a long time, being good in antibacterial effect and the like. The preparation method is simple and efficient, easily guarantees flame retardance and high-brightness white color of the material, and is high in production efficiency.

The invention provides a novel talc porcelain and a making method thereof. The talc porcelain is made from 14.5-16.8% of clay, 12-17% of feldspar, 2-7% of silicate, 1-5% of a composite additive, and the balance of sepiolite. The making method of the novel talc porcelain includes the following steps: raw material crushing, material proportioning, squeezing for forming mud, ageing, vacuum mu mixing, slip casting and molding, stripping and sintering, laboratory scale test, pilot scale test and industrial production. The sepiolite is adopted to substitute talc, reasonable formula components are improved, and technological parameters are reasonably set, so the produced novel talc porcelain has excellent thermal stability and excellent mechanical properties. The making method has the advantages of simplicity, excellent processing plasticity, low sintering temperature, effective reduction of the production cost, and meeting of market demands.