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

Micro-alloying steel for oil gas transport seamless pipeline and its preparation method

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.
Owner:LAIWU IRON & STEEL GRP

Al-Ti-B-rare earth(RE) grain refiner and preparation method thereof

The invention relates to an Al-Ti-B-RE grain refiner and a preparation method thereof. The Al-Ti-B-RE grain refiner is used for Al-Mg-Si alloy, and is characterized by containing the following components in percentage by weight: 6.9 to 7.9 percent of Ti, 1.31 to 1.75 percent of B and 1.5 to 2.0 percent of mixed RE. The mixed RE is cerium-enriched rare earth. The preparation method of the cerium-enriched rare earth comprises: mixing the raw materials according to a weight part ratio, wherein the mixing time is controlled to be 3 to 4 hours; heating an aluminum ingot in a medium frequency induction furnace to an overhigh temperature of 700 to 750 DEG C; filling a mixed pressed block of potassium fluotitanate and potassium fluoborate and cerium-enriched rare earth into a graphite bell jar; clamping the reversed bell jar by using forceps, and pressing the bell jar into the lower middle part of aluminum melt; raising the furnace temperature to 800 to 850 DEG C, and magnetically stirring for 25 to 30 minutes with the induction furnace; after reaction, taking the graphite bell jar out; standing and keeping the temperature for 20 minutes; forcefully stirring the melt once with an artificial graphite rod every 3 minutes, and stirring for more than five times; treating molten alloy; standing and keeping temperature for 15 to 20 minutes; and performing secondary slagging off.
Owner:HUANGGANG HUAER ALUMINUM ALLOY

High-tensile stretch dehiscence-resistant halogen-free low-smoke flame-proof polyolefin and uses thereof

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.
Owner:WUXI HUANCABLE +1

Modified polyvinylidene fluoride material used for solar cell protective films and preparation method thereof

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.
Owner:SUZHOU HECHANG POLYMERIC MATERIALS

Ion wind air purifier with inner cavity easy to clean

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.
Owner:SUZHOU BEIANG TECH LTD

Multi-silver brazing filler metal containing manganese and tin and preparation method thereof

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.
Owner:HANGZHOU HUAGUANG ADVANCED WELDING MATERIALS CO LTD

Copper alloy bar for high-strength corrosion-resistant wear-resistant valve element and preparation method thereof

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.
Owner:JINTIAN COPPER GROUP CORP NINGBO

Process for preparing bronze Nb3Sn superconducting wire material

ActiveCN102082009AReduce bondingReduce the effect of current carrying capacitySuperconductors/hyperconductorsSuperconductor devicesNitrogenIngot
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.
Owner:西部超导材料科技股份有限公司

Vacuum high-temperature aluminum solder and preparation method thereof

The invention discloses a vacuum high-temperature aluminum solder and a preparation method of the vacuum high-temperature aluminum solder. The preparation method of the vacuum high-temperature aluminum solder comprises the following steps that preprocessed aluminum ingots are taken and smelted with the furnace temperature controlled to be 700-750 DEG C; after the aluminum ingots are fully smelted, surface covering agents are added to a furnace to cover the surface of molten aluminum; monocrystalline silicon is added to the molten aluminum immediately, and the furnace temperature keeps 700-780 DEG C; after the silicon is smelted, lanthanum salt modifier is added to the molten aluminum; magnesium metal is added into the molten aluminum, and the temperature is maintained for 30-60 minutes after the magnesium metal is smelted; strontium metal is added into the molten aluminum, and the temperature is maintained for 8-20 minutes after the strontium metal is smelted; finally, slag in the mixed solution in the furnace is removed, and then vacuum high-temperature aluminum solder is obtained in a pouring mode. The mobility of the vacuum high-temperature aluminum solder on the surface of aluminum alloy is obviously improved, welding seams have no obvious welding lack phenomenon after welding, and the result of non-destructive testing shows that the welding seams are uniform in structure, and no obvious defect such as insufficient welding or welding lack exists.
Owner:CASIC DEFENSE TECH RES & TEST CENT

Flexible adhesive tape brazing filler metal and preparation method thereof

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.
Owner:NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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