42results about How to "Play a role in refinement" patented technology

The invention discloses a preparation method of polycarbonate/polyester alloy. Glycidyl methacrylate grafted ethylene-octylene multipolymer/organic modified needle-shaped aedelforsite composite toughener, i.e. a technology of simultaneously using organic/inorganic rigid particle toughener is adopted; the glycidyl methacrylate grafted ethylene-octylene multipolymer, organic modified needle-shaped aedelforsite, polycarbonate and polyester are melted and mixed in a double-screw extruder, to obtain high-performance alloy material. The prepared polycarbonate/polyester alloy has excellent integrated mechanical properties and size stability, the notched impact strength reaches 1200J/m, the tensile strength reaches 67MPa, the elongation at break reaches 250 percent, the flexural strength is up to 98MPa, the flexural modulus reaches 2750MPa, and the thermal deformation temperature in high load (1.82MPa) is up to 105 DEG C. Therefore, the prepared polycarbonate/polyester alloy can be applied in cars, and to outer decorations, household electrical appliances, IT and the like industrial products.

The invention discloses a magnesium alloy refiner and a preparation method thereof, and relates to a grain refiner and a preparation method thereof. The method solves the problems that an overheating treatment method of the existing magnesium alloy refining method has strict condition requirement, the oxidation burning loss of magnesium is serous, a carbon-containing material treatment method has high temperature and produces harmful gases such as Cl2, HCl and the like, a ferric chloride method reduces the corrosion resistance of the magnesium alloy, an alloying method has high cost, a granular graphite or aluminium carbide granule method is easy to produce segregation on the grain boundary and a Zr element method has narrow application range. The magnesium alloy refiner is prepared from a calcium metal and a primary magnesium ingot. The preparation method comprises the following steps: heating and melting the primary magnesium ingot under atmospheric protection, then adding the calcium metal into the melted primary magnesium ingot, dissolving the calcium metal and stirring the mixture uniformly, and casting the mixture to form the magnesium alloy refiner. The magnesium alloy refiner has no burning loss, does not produce the harmful gases, has no influence on the corrosion resistance of the magnesium alloy, has low cost, is uniformly distributed in the alloy, can improve the mechanical property of the alloy, and is used for refining the magnesium alloy.

The invention discloses high-plasticity two-phase yttrium-containing magnesium-lithium-aluminum alloy and a preparation method thereof. The alloy comprises the following specific components in percentage by weight: 9.50-10.80% of Li, 3.00-5.00% of Al, 0.50-0.70% of Y, 0.10-0.30% of Zr and the balance of Mg; the alloy has the structural characteristics that an alpha phase, a beta phase and a precipitated phase exist at the same time, wherein the alpha phase is a Mg-based solid solution and is in a close-packed hexagonal structure, the beta phase is a Li-based solid solution and is in a body-centered cubic structure, and the precipitated phase is a rare earth compound Al2Y; and the alloy has the characteristics of low density, high plasticity and higher strength. The preparation method disclosed by the invention is a normal-temperature plastic deformation method which combines casting with equal channel angular extrusion or traditional extrusion deformation process; and compared with the traditional high-temperature deformation process, the preparation method has good practicality and is simpler and more convenient to operate, and can be used for effectively lowering the production cost, thus the preparation method has good industrial production prospects.

The invention discloses flux for aluminum and aluminum alloy melt refining. The flux consists of the following components in percentage by mass: 5-40% of Na3AlF6 and K3AlF6, 20-50% of MgCl2 and/or AlF3, 10-40% of KCl, 3-8% of K2TiF6 and 0.1-3% of graphite powder, and the flux is prepared by virtue of a hybrid melting method. Na3AlF6 and K3AlF6 in the flux have effects of adsorbing and dissolving impurities of aluminum oxide, and Na3AlF6 and K3AlF6 can be matched for use to achieve relatively good effects. The flux is prepared by adopting a hybrid melting method, so that the water in the components can be completely removed, and the flux is uniform in component and stable in quality.

The invention relates to a semi-continuous casting method for an in-situ particle reinforced aluminum-based composite and belongs to the technical field of composite forming. The method includes the following steps that an in-situ ceramic particle reinforced aluminum-based composite is taken, melted and subjected to heat preservation to obtain composite melt; the composite melt is injected into a crystallizer, and meanwhile ultrasonic treatment is carried out; when the melt is solidified at the position of a graphite annulus, a dummy bar head descends, and meanwhile cooling water is started to cool a cast rod; when the dummy bar head descends to the position of a scraper blade, the scraper blade starts to make contact with the surface of the cast rod, and the cooling water is scraped away from the surface of the cast rod; along with descending of the dummy bar head, the cast rod slowly enters a heating furnace to be annealed; and the cast rod is hoisted after casting is completed, and an aluminum-based composite semi-continuous cast rod is obtained. The method is simple in device, easy and convenient to operate and suitable for large-scale industrial production of the aluminum-based composite, and has good practical application value, and large-size in-situ particle reinforced aluminum-based composite cast ingots with fine crystal particles and evenly-distributed particles can be prepared.

The invention discloses high-strength rapid-corrosion magnesium alloy and a preparation method thereof. The high-strength rapid-corrosion magnesium alloy comprises the chemical components including, by weight, 2-7% of Al, 1-2% of Zn, 0.2-0.6% of Zr, 0.1-0.3% of Si, 0.1-0.5% of Mn, 0.1-0.3% of Ca, 1-1.5% of Fe, 0.05-5% of Cu and the balance magnesium and inevitable impurities, wherein the Si and the Mn are added as intermediate alloy. The magnesium alloy has the more excellent strength, ductility, hardness and mechanical performance such as creep resistance compared with those of traditional commercial magnesium alloy and the advantage of rapid dissolution.

The invention discloses an aluminum alloy sodium-free refining agent containing rare earth. The aluminum alloy sodium-free refining agent comprises, by weight, 50-60 parts of KCl, 30-35 parts of K2CO3, 10-15 parts of LiCl, 30-35 parts of AlF3, 10-12 parts of potassium fluoroaluminate, 5-10 parts of CaF2, 5-10 parts of carbon powder, 15-25 parts of light calcium carbonate, 2-8 parts of CaO, 2-5 parts of fluorite and 5-10 parts of rare earth. By means of the refining agent, no impurity sodium is introduced into the aluminum alloy refining process, rare earth metal is added, and therefore the mechanical performance of alloy can be effectively improved.

The invention discloses a special aluminum alloy ingot for a wheel hub. The aluminum alloy ingot comprises the components by mass percent: 1.2-2.0% of Si, 0.05-0.2% of Mn, 0.05-0.1% of Cr, 2.0-2.8% of Mg, 0.1-0.3% of Cu, 0.1-0.3% of Zn, 0.3-0.8% of Ti, 0.09-0.25% of Sn, 0.1-0.2% of Zr, 0.1-0.2% of Er, 0.1-0.2% of Sr, less than or equal to 0.5% of gross other metallic and nonmetallic impurity elements, and the balance Al. A preparation method of the aluminum alloy ingot comprises the steps of melting, refining, standing and casting. According to the aluminum alloy ingot, the elements such as Ti, Zr, Er and Sr are added, so that metamorphism and refining functions can be exerted on the structure of an aluminium alloy, so that the mechanical property of the aluminium alloy is improved, and a guarantee is provided for improving the mechanical property of the aluminium alloy wheel hub.

The invention discloses a sodium-free refining agent for aluminum alloy smelting and a preparation method thereof. The refining agent is prepared from the following raw materials in parts by weight: 15-20 parts of potassium fluorosilicate, 8-12 parts of potassium chloride, 10‑16 parts of aluminum fluoride, 8‑14 parts of magnesium chloride, 12‑18 parts of calcium fluoride, 18‑24 parts of potassium fluotitanate, 10‑14 parts of potassium fluoborate, 6‑10 parts of titanium dioxide, 4‑10 parts of potassium nitrate parts, 3‑5 parts of toner. The preparation method is as follows: (1) fully mix and stir each component of the formula amount, carry out crushing treatment, and pass through a sieve of 80-100 mesh, (2) put the mixture obtained in step (1) into a crucible, heat and melt to remove crystal water , the heating temperature is 80-100°C, the heating time is 2-2.5 hours, and then kept for 50-60 minutes, (3) the product obtained in step (2) is cooled to 40-45°C, and the obtained granular mixture It is the refining agent, and (4) is packed in a waterproof plastic bag. The refining agent of the invention can serve the refining purpose of removing slag and degassing, does not contain sodium salt components, and has good refining effect.

The invention discloses an aluminum alloy refining agent containing La, Er and Zr. The aluminum alloy refining agent comprises a material A and a material B, wherein the material A comprises, by weight, 70-80 parts of NaCl, 50-56 parts of KCl, 12-18 parts of LiCl, 30-36 parts of NaF, 10-12 parts of AlF3, 10-12 parts of sodium fluoroaluminate, 12-18 parts of carbon powder, 20-28 parts of light calcium carbonate and 5-10 parts of CaO; the material B is composed of C2Cl6, TiO2 and metal with the weight ratio of 5: 1.5-2: 1-1.5, and the metal is mixed metal containing Mg, La, Er and Zr; the material A and the material B are matched for use and the weight ratio is 2-4: 1. In the process of refining aluminum alloy through the refining agent, dehydrogenation and oxide inclusion removal can be achieved, and the refining agent has the modification and refining function on an aluminum alloy structure.

The invention discloses an aluminum alloy cast rod for casting a hub. The cast rod is made of raw materials including, by mass percentage, 0.4% of Si, 0.12% of Mn, 0.08% of Cr, 1.7% of Mg, 0.2% of Cu, 0.6% of Ti, 0.05% of B, 0.11% of Sb, 0.16% of Zr, 0.04% of Gd, not larger than 0.5% of other metal and nonmetallic impurity elements and the balance Al. The preparing method of the aluminum alloy cast rod comprises the steps of smelting, refining, standing and casting. According to the aluminum alloy cast rod, elements of Sb, Zr, Gd and the like are added to achieve the modification and refining effects on an aluminum alloy structure, the cast rod is used for producing the aluminum alloy hub, the tensile strength, the yield strength and the ductility of the aluminum alloy hub can be greatly improved, and the excellent impact toughness and corrosion resistance are achieved.

The invention relates to the field of materials, in particular to a SnS2-CNTs composite material and a preparation method thereof, as well as a preparation method of a composite anode material. preparation method of the SnS2-CNTs composite material comprises the steps that tin chloride pentahydrate is added to a uniformly dispersed CNTs dispersion solution, and after uniform stirring is completed,a first solution is obtained; a sulfur source solution is added to the first solution, after uniform stirring is completed, reaction is carried out for 20-25 hours at 175-185 DEG C, and after coolingis carried out until the room temperature is reached, the SnS2-CNTs composite material is obtained. The preparation method of the composite anode material comprises the step that the SnS2-CNTs composite material and sulfur are subjected to thermal melting treatment, and a SnS2-CNTs composite anode material is obtained. Tin disulfide has high chemical adsorption performance, carbon nano tubes havegood electrical conductivity, SnS2 and CNTs have a synergistic effect, and the electrochemical properties of sulfur anodes are improved effectively.

The invention discloses an aluminum alloy casting rod for an automobile hub. The aluminum alloy casting rod consists of the following components in percentage by mass: 0.8-1.3% of Si, 0.03-0.09% of Mn, 0.9-1.6% of Mg, 0.3-0.8% of B, 0.15-0.28% of Cr, 0.03-0.08% of Fe, 0.03-0.08% of Nd, 0.09-0.16% of La, 0.04-0.08% of Yb, less than or equal to 0.5% of other metal and non-metal impurity elements, and the balance of Al. A preparation method for the aluminum alloy casting method comprises the steps of melting, refining, stewing and casting. The casting rod disclosed by the invention is utilized to produce the aluminum alloy hub, so that the obtained aluminum alloy hub is beautiful in outlook, is light in weight and is high in strength, has relatively high corrosion resistance and relatively high fatigue resistance, and has a long service life.

The invention discloses composite flux suitable for magnesium-aluminum-series magnesium alloy, a preparation method of the composite flux and application of the composite flux. The composite flux comprises, by mass, 30-40 parts of magnesium chloride, 20-30 parts of potassium chloride, 4-8 parts of sodium chloride, 6-12 parts of barium chloride, 3-6 parts of calcium chloride, 6-12 parts of calcium fluoride, 0.5-3 parts of carbon powder, 1-5 parts of titanium powder and 1-30 parts of mixed rare earth oxide. The mixed rare earth oxide is a mixture of cerium oxide, yttrium oxide and scandium oxide. The preparation method of the composite flux comprises the steps of uniformly mixing the magnesium chloride, the potassium chloride, the sodium chloride, the calcium chloride, the barium chloride and the calcium fluoride, crushing the materials to form powder, then adding the carbon powder and the titanium powder to conduct mixing so as to obtain the composite flux suitable for the magnesium-aluminum-series magnesium alloy. The provided composite flux has the remarkable purifying and refining effects.

The invention discloses an aluminum alloy casting rod for a car hub and a preparing method of the rod. The aluminum alloy casting rod comprises, by mass percent, 0.3 to 1.5% of Si, 0.06 to 0.1% of Mn,0.8 to 1.5% of Mg, 0.2 to 0.5% of Zn, 0.3 to 0.6% of Ti, 0.04 to 0.06% of Be, 0.03 to 0.1% of Zr, 0.03 to 0.1% of Er, 0.01 to 0.05% of Ce, 0.2 to 0.6% of B, 0.08 to 0.1% of Cr, 0.02 to 0.06% of Nd and the balance Al and inevitable metal and non-metal impurity elements. According to the aluminum alloy bar, through adding of Er, Zr, Ce and the like, the metamorphic and refining effect on an aluminum alloy structure can be achieved, the casting rod is used for producing the aluminum alloy hub, the tensile strength, the yield and the ductility of the aluminum alloy hub can be greatly improved, and excellent impact toughness and corrosion resistance are achieved.

The invention discloses an aluminum alloy ingot used for a hub. The aluminum alloy ingot comprises, by mass, 0.8-1.5% of Si, 1.0-1.8% of Mg, 0.12-0.22% of Ni, 0.1-0.3% of Zn, 0.30-0.42% of Ti, 0.09-0.21% of Sr, 0.06-0.12% of Y, 0.08-0.14% of Er, 0.02-0.04% of Ga, 0-0.5% of other metal impurity elements and non-metal impurity elements, and the balance Al. A preparation method of the aluminum alloy ingot comprises the steps of melting, refining, standing and casting. According to the aluminum alloy ingot, the elements such as Ti, Y, Er and Ga are added so that aluminum alloy structures can be modified and refined, the mechanical properties of aluminum alloy are improved, and the effect that the mechanical performance of the aluminum alloy hub is improved is guaranteed.

The invention discloses a sodium-free refining agent used for smelting an aluminum alloy. The refining agent is prepared from the following raw materials including, by weight, 10-16 parts of calcium fluoride, 10-14 parts of potassium fluorosilicate, 10-14 parts of potassium fluotitanate, 8-12 parts of potassium chloride, 8-14 parts of lithium chloride, 8-14 parts of magnesium chloride, 6-10 partsof titanium dioxide and 3-5 parts of carbon powder. According to the refining agent, in the refining process, the hydrogen removing effect is remarkable, oxide impurities in melt can be removed fully,hot slag is recovered more conveniently, and the recovery rate is higher. Due to containing of titanium, a certain effect of refining the alloy is achieved. The refining agent does not contain sodiumsalt ingredients and has a good refining effect.

The invention discloses a die casting aluminum alloy. The die casting aluminum alloy comprises following components including, by weight percent, 8.5% to 10.5% of Si, 2.2% to 4.2% of Cu, 0.15% to 0.25% of Mg, 0.5% to 0.8% of Zn, 0.2% to 0.8% of Fe, 0.1% to 0.3% of Mn, 0.1% to 0.3% of Ni, 0.1% to 0.2% of Sn, 1.5% to 2.5% of Sr, 0.05% to 0.08% of Ti, and the balance Al. Al-Si eutecticum formed by Si and Al in the die casting aluminum alloy has the good plasticity, added Mg and Mn can improve alloy mechanical strength, in addition, through the synergistic effect of Sr, Ti and the other elements, an aluminum alloy structure can be refined, the average size of grains of the all portions of the aluminum alloy structure can be small, distribution is uniform, and toughness and ductility are greatly improved.

The invention relates to a gold-tin-series lead-free solder and a preparation method thereof. The gold-tin-series lead-free solder comprises the following components in percentage by mass: 17.9%-19.9% of Sn, 0.8%-1.9% of Ag, 0.8%-2.7% of In, and the balance of gold. The preparation method comprises the following steps: Au and Sn are smelted together to obtain an Au-Sn intermediate alloy, and Ag and In are smelted together to obtain an Ag-In intermediate alloy; then, the Au-Sn intermediate alloy and the Ag-In intermediate alloy are smelted together to obtain a gold-tin-series cast ingot; the obtained solder is high in reliability, uniform and fine in structure, high in strength, high in machinability, and capable of being widely popularized and applied to low-temperature packaging occasions and multi-stage packaging occasions of electronic products.