39results about How to "Improve casting fluidity" patented technology

The invention relates to a novel aluminum alloy; the content of Si in the aluminum alloy is adjusted, based on the aluminum alloy A356.2; the chemical components thereof are as follows: larger than 7.5 to 8.2 percent of Si, 0.28 to 0.45 percent of Mg, 0.08 to 0.20 percent of Ti, not larger than 0.12 percent of Fe, not larger than 0.01 percent of Cu, not larger than 0.01 percent of Zn, not larger than 0.05 percent of Mn, not larger than 0.05 percent of Zr, not larger than 0.01 percent of Ni, not larger than 0.01 percent of Sn, not larger than 0.10 percent of microelements and the rest is Al. In the invention, as the content of Si in the aluminum alloy is properly added, the novel aluminum alloy can optimize the matching between the anti-tension intensity and the extending rate of the aluminum alloy, increase the anti-impact performance of the product and simultaneously improve the casting fluidity of the aluminum alloy and effectively reduce the casting defect; therefore, the novel aluminum alloy has the characteristics of optimizing the matching between the anti-tension intensity and the extending rate of the aluminum alloy, increasing the anti-impact performance of the product, improving the casting fluidity, avoiding casting defect, improving the product quality, and the like.

The invention relates to a preparation method of high-elasticity, corrosion-resistant and wear-resistant Cu-Ni-Sn alloy. The Cu-Ni-Sn multi-element alloy is obtained through vacuum induction melting or covering protection type non-vacuum smelting. In the casting forming process, electromagnetic stirring is applied until alloy liquid is complete solidified, and then the as-cast alloy is subjected to homogenization annealing, hot rolling and cogging, solid solution treatment, cold deformation, spinodal decomposition and other processes. The preparation method of the Cu-Ni-Sn alloy is capable ofrefining crystalline grains, reducing dendritic spacing and eliminating alloy microscopic and macroscopic structure and component segregation, provides implementation conditions for follow-up alloy plastic processing, spinodal decomposition and other processes, and has the beneficial effects that energy is saved, the production efficiency is improved, the service life of the alloy is prolonged, and the production cost is reduced.

The invention discloses a corrosion-resistant aluminum alloy door and window and a preparation method thereof. The corrosion-resistant aluminum alloy door and window comprises an aluminum alloy door and window body, wherein the aluminum alloy door and window body is provided with a glass frame and a window frame; the glass frame is hinged to the window frame; an oxidation film, a resin-based composite material layer and a corrosion-resistant coating are sequentially arranged on the surface of the aluminum alloy door and window body from inside to outside; and the aluminum alloy door and windowbody comprises the following raw materials in parts by weight: 95-100 parts of aluminum, 1-3 parts of silicon powder, 2-5 parts of zinc powder, 2-5 parts of copper powder, 1-3 parts of magnesium powder, 0.5-1.5 parts of tin powder, 0.5-1.5 parts of strontium powder, 0.5-1.5 parts of manganese powder, 0.5-1.5 parts of iron powder and 0.5-1.5 parts of rare earth elements. According to the corrosion-resistant aluminum alloy door and window disclosed by the invention, some tin powder, strontium powder, manganese powder, iron powder and the like are added into the components of the aluminum alloydoor and window body, so that the mechanical properties of the aluminum alloy door and window body are effectively improved, and the tensile strength, corrosion resistance and strength effects of thealuminum alloy door and window body are remarkable; and the rare earth elements are added into the aluminum alloy door and window body, so that the casting fluidity of aluminum alloy liquid is improved, and the casting properties of aluminum alloy are improved.

The invention discloses a TiAl-based alloy with excellent high temperature oxidation resistance and creep resistance suitable for casting and the alloy belongs to the gamma-TiAl alloy. The TiAl-based alloy comprises the following components by atomic percent: 44.0-48.0% of Al, 1.0-3.0% of Nb, 0.1-3.0% of Mo, 0-0.8% of Si or/and 0-0.6% of C, and the balance of Ti and impurity elements, wherein thesum of the atomic percents of Si and C is 0.1-0.9%. The TiAl-based alloy disclosed by the invention has good high temperature performances and casting fluidity and is suitable for the casting of thin-walled parts; methods such as chemical treatment, thermal spraying and ion implantation which are used to increase the oxidation resistance, are not required to treat the surface of the alloy at 850-950 DEG C; and the TiAl-based alloy is particularly suitable to cast the gasoline engine supercharger turbine rotor which can work below 900-950 DEG C.

The invention discloses an aluminum alloy material for high-performance thin-wall 3D printing sand casting and a preparation method thereof, and relates to the technical field of aluminum alloy production. The material comprises the following components of, in percentage by mass, 6.5%-8% of Si, 0.25%-0.45% of Mg, 0.05%-0.16% of Ti, 0.01%0-0.04% of Sr, 0.1%-0.2% of Fe, 0.16%-0.6% of Zr, 0%-0.4% ofSc, less than or equal to 0.10% of other inevitable impurity elements, and the balance Al. In addition, the invention further discloses the preparation method of the high-performance aluminum alloy. According to the alloy, the contents of Si, Mg, Sr, Ti, Zr and Sc are controlled, so that the alloy has good fluidity, a cast 3D printing sand mold casting is fine and uniform in structure, the strength and toughness of the alloy are remarkably improved, and the requirement of thin-wall 3D printing sand mold casting market development can be well met.

The invention provides a Co-Cr-Fe-Ni-V-B eutectic high-entropy alloy with excellent thermal modification and a preparation method of the Co-Cr-Fe-Ni-V-B eutectic high-entropy alloy. A general formula of the eutectic high-entropy alloy is CoaCrbFecNidVeBf, 0.8 < = a < = 1.2, 0.8 < = b < = 1.2, 0.8 < = c < = 1.2, 1.6 < = d < = 2.4, 0.8 < = e < = 1.2, 0.3 < = f < = 0.6, and a, b, c, d, e and f are molar ratios of corresponding elements respectively. According to the eutectic high-entropy alloy, through simple high-temperature annealing heat treatment, a long-strip-shaped M3B2 phase is effectively fused and spheroidized and is in a spherical shape, stress concentration is reduced, the fracture toughness of the alloy is greatly improved, and meanwhile the tensile strength is still kept at a high level. The eutectic high-entropy alloy shows a remarkable thermal modification characteristic and has a wide application prospect in the field of engineering structures.

The invention provides an aluminum alloy for preparing an air cylinder piston for a ship and a preparation method thereof and belongs to the field of aluminum alloys. The aluminum alloy comprises, by weight, 15-17% of silicon, 1.25-2.45% of copper, 0.5-1.5% of iron, 0.2-0.4% of magnesium, 0.02-0.05% of boron, 0.02-0.07% of titanium, 0.03-0.07% of zirconium, 0.03-0.08% of vanadium, 0.01-0.02% of praseodymium, 0.01-0.02% of scandium, 0.01-0.02% of holmium, 0.01-0.03% of yttrium and the balance aluminum. The aluminum alloy is high in friction-resistant property, yield strength and creep-resistant property. The aluminum alloy preparation method sequentially comprises the following steps of ingot casting, hot extrusion, quenching and aging treatment according to a formula, the preparation technique is simple, alloy internal stress can be effectively removed, and the mechanical property of the alloy is reinforced.

The invention relates to an environment-friendly composite spheroidizing agent applied to thick and big ductile iron. The composite spheroidizing agent comprises, by weight, 78-90 parts of spheroidizing agents, 5-20 parts of melt-resisting agents, 1-5 parts of dreg removing agents, 2-8 parts of purifying agents, 1-6 parts of desulfurizing agents and 2-5 parts of nucleating agents. The spheroidizing agent has the advantages shown by rear earth and magnesium during spheroidizing, and overcomes the defects of the rear earth and the magnesium. The magnesium is a primary spheroidizing element according to its ratio in the composite spheroidizing agent, while the rare earth has a secondary assisted spheroidizing function. The composite spheroidizing agent has good effects in desulfurizing, deoxidizing, iron liquid purifying, interference element eliminating, eutectic point reducing and supercooling degree increasing, and has the following effects on the performance of the ductile iron: improving casting mobility, reducing temperature of iron liquid oxidation films, changing shrinkage characters of ductile iron, reducing shrinking and loosening, improving mechanical performance, refining graphite and improving abrasive resistance.

The invention relates to a magnesium alloy suitable for die casting of ultra-thin-wall castings and a preparation method thereof, and belongs to the field of magnesium aluminum alloy. The compositionsin weight percent of the alloy are 11.0 to 14.0 percent of aluminum, 0.5 to 2.0 percent of neodymium, 0.1 to 1.0 percent of praseodymium, 0.2 to 1.0 percent of zinc, 0.2 to 0.4 percent of manganese,and the balance being magnesium element and inevitable impurity elements. The preparation method for the magnesium alloy is to adopt protective atmosphere of CO2 and SF6 for smelting, wherein the smelting temperature is between 710 and 750 DEG C. The alloy prepared consists of alpha phase, Mg17Al12 phase containing the neodymium or the praseodymium, and magnesium, aluminum, neodymium and praseodymium complex intermetallic compound phase. The mechanical property of the magnesium alloy is superior to that of an AZ91D magnesium alloy, and the casting fluidity of the magnesium alloy is obviously superior to that of the AZ91D and improved by 25.6 percent compared with the AZ91D, so that the magnesium alloy is suitable for die casting or semi-solid casting and can also be used for sand mold or iron mold gravity casting or low-pressure casting.

The invention discloses a thin-strip continuous casting high-performance 6XXX aluminum alloy plate strip and a preparation method thereof, the aluminum alloy plate strip comprises the following components in percentage by mass: 0.5-1.5% of Si, 0.1-2.0% of Mg, 0.1-1.0% of Fe, 0.05-0.5% of Mn, 0.02-0.2% of Cu, 0.01-0.08% of Ti, 0.001-0.008% of B and the balance of Al and other inevitable impurities, the content of a single impurity is less than or equal to 0.05%, and the content of total impurities is less than or equal to 0.15%. According to the preparation method, semisolid treatment is combined with a twin-roll thin-strip continuous casting process, and compared with an existing 6XXX aluminum alloy, the strength of the prepared 6XXX aluminum alloy plate strip is improved by 20% or above, and the formability is improved by 30% or above; and compared with a steel plate for an automobile, the weight is reduced by more than 40% easily. The produced aluminum alloy plate strip is a second-generation ABS aluminum alloy product, is widely applied to the field of automobiles, particularly can be used for automobile engine covering parts and can also be used for parts such as fenders, automobile doors, automobile roofs and trunk lids, and a wide space is provided for the automobile industry in the aspects of light weight, energy consumption reduction and fuel economy improvement.

The invention relates to a preparation method of a novel 7XXX aluminum alloy thin strip with high performance by jet casting, which comprises the following steps of: 1) smelting according to the following chemical components in percentage by weight: 4.8 to 6.3 percent of Zn, 1.6 to 2.5 percent of Mg, 1.6 to 2.5 percent of Cu, 0.1 to 0.15 percent of Zr and the balance of Al and other inevitable impurities; the single impurity content is less than or equal to 0.1%, and the total impurity content is less than or equal to 0.2 (2) nano-particle enhancement; 3) spray deposition and continuous casting; 4) cooling; 5) primary hot rolling; (6) cooling and secondary hot rolling; (7) coiling; and 8) post-processing. Compared with an existing 7XXX aluminum alloy, the 7XXX aluminum alloy thin strip cast and rolled through the spray deposition combined double-roller thin strip cast rolling technology has the advantages that the strength is improved by 25% or above, and the ductility is improved by 35% or above; compared with a steel plate, the weight is reduced by 50% or more.

The invention relates to a jet cast rolling high-performance 7XXX aluminum alloy thin strip and a preparation method thereof, the aluminum alloy thin strip comprises the following components in percentage by mass: 4.8-6.3% of Zn, 1.6-2.5% of Mg, 1.6-2.5% of Cu, 0.1-0.15% of Zr, 0.01-0.08% of Ti, 0.001-0.008% of B, and the balance of Al and other inevitable impurities, the content of a single impurity is less than or equal to 0.1%, and the content of total impurities is less than or equal to 0.2%. Compared with an existing 7XXX aluminum alloy, the 7XXX aluminum alloy thin strip prepared through the spray deposition and double-roller thin strip cast rolling combined technology has the advantages that the strength is higher by 20% or above, and the ductility is higher by 30% or above; compared with a steel plate, the weight is reduced by more than 40%. The produced aluminum alloy thin strip can be widely applied to the field of aerospace, such as various aircraft fuselages, wing beams, cabin wallboards, aircraft high-stress structural parts, aircraft skins, high-strength structural parts in aircraft rockets and the like, and a wide space can be provided for aerospace high strengthening, light weight, energy consumption reduction and fuel economy improvement.

The invention discloses a high-entropy alloy containing eutectic structure (NiAl)100-3xMoxCrxVx according to the atomic percentage, 7.5≤x≤10, wherein Ni and Al are in an equiatomic ratio; the invention also discloses the eutectic The preparation method of the high-entropy alloy with the microstructure specifically comprises: first weighing the raw material according to the atomic ratio, then pickling the raw material, and finally smelting in a melting furnace to obtain the high-entropy alloy with the eutectic structure. The high-entropy alloy prepared by the method of the invention has excellent strength and toughness.