149results about How to "Improve die casting effect" patented technology

The invention discloses a cast magnesium alloy of low linear shrinkage, which belongs to the field of magnesium alloys. The magnesium alloy consists of Mg, Al, Zn, Mn, rare earth, Nb, Li and M element, wherein the materials have the following weight percentage composition: 1.5-25 percent of Al, 0.1-3.5 percent of Zn, 0.1-2.2 percent of Mn, 0.0002-16 percent of rare earth, 0.0002-4 percent of Nb, 0.0002-9 percent of Li, 0.0002-2 percent of M element and the balance Mg; and the M element is at least one of Zr, Ti, Sr, Ca, C and B. According to the heat-resistant magnesium alloy, the rare earth element and the Nb element are added into the magnesium alloy, so that the structure of beta phase is changed; the Zr element and the M element are added to refine crystal grains; due to combined action of the elements, latent heat of crystallization during alloy solidification is changed; and the magnesium alloy which has superior mold-filling capacity, low shrinkage, superior mechanical property and good machinability, fluidity and die-cast performance and is suitable for casting is obtained.

The invention discloses an aluminium die-cast alloy which mainly contains Si, Cu, Fe, Mn, Mg, Zn, Ti and LaCe elements. The aluminium die-cast alloy is characterized in that weight content of all the elements are respectively as follows: 0.5% to 2.0% of Si, 0.1% to 0.5% of Cu, 0.3% to 0.8% of Fe, 0.5% to 1.0% of Mn, 2.0% to 4.0% of Mg, 0.8% to 2.0% of Zn, 0.15% to 0.2% of Ti and 0.6% to 0.8% of LaCe. The aluminium die-cast alloy has the good anodic oxidation ability, mechanical property and corrosion resisting property.

The invention belongs to the technical field of aluminum alloy, in particular to die-casting aluminum alloy with the anode being oxidable. The aluminum alloy is composed of, by weight, 0.3%-0.5% of Si, 0-0.1% of Cu, 0.8%-1.5% of Mg, 0-0.05% of Zn, 0-0.35% of Fe, 1.0%-1.5% of Mn, 0.5%-2.0% of Ti, 0-0.008% of Sn, 0-0.008% of Pb and the balance Al. Compared with the prior art, all the elements are utilized reasonably, and the content of all the elements is limited within a reasonable range, so that the die-casting aluminum alloy with the anode being oxidable which is good in die-casting performance and excellent in anodic oxidation performance is obtained, and the die-casting aluminum alloy is suitable for aluminum alloy structural components with the anode being oxidable and high in surface treatment effect requirement.

The invention discloses a MgAlZn series heat resistant magnesium alloy containing niobium, and belongs to the magnesium alloy field. The magnesium alloy is composed of elements of Mg, Al, Zn, Mn, rare earths, Nb, Zr and M, and comprises, by weight, 1.5 to 2.5 percents of Al, 0.1 to 3.5 percents of Zn, 0.1 to 2.2 percents of Mn, 0.0002 to 16 percents of rare earths, 0.0002 to 4 percents of Nb, 0.001 to 2 percents of Zr, 0.0002 to 2 percents of M element, and the balance Mg; wherein the M element is at least one of Ti, Sr, Ca, C and B. According to the magnesium alloy, the structure of Beta phase is changed and the heat resistant performance of the magnesium alloy is improved by adding rare earth elements and the Nb element into the magnesium alloy; and grains are refined by adding the Zr and M elements, so that the heat resistant magnesium alloy which has good mechanical properties, machinability, mobility and die-casting properties and is suitable for casting in particular to die-casting is obtained.

The invention discloses a heatproof magnesium alloy, which belongs to the magnesium alloy field. The magnesium alloy is composed of Mg, Zn, Zr, rare earth, Nb, Al and M, and comprises the following components by weight: 0.2-9% of Zn, 0.1-2% of Zr, 0.0002-16% of rare earth, 0.0002-4% of Nb, 0.001-1.49% of Al, 0.001-2% of M and the balance of Mg. The M element is at least one selected in Ti, Sr, Ca, C and B. The rare earth and an Nb element are added in the magnesium alloy, and a structure of a beta phase is changed; the combined action of Zr and the M element can strongly refine the crystal grain, and Zr and M are reacted with certain impurity element (such as Si) in an alloy liquid and deposited, and the alloy liquid is purified. The combined effect of the elements enhances the high temperature resistance performance of the magnesium alloy, the heatproof magnesium alloy has excellent mechanical property and machinery processability, and good fluidity and die casting performance, and is suitable for casting the heatproof magnesium alloy and die casting of the heatproof magnesium alloy.

A magnesium-rare earth-yttrium-zinc alloy consists of 0.2-1.5% by weight zinc and rare earth(s) (RE) and yttrium in amounts which fall within a quadrangle defined by lines AB, BC, CD and DA wherein: A is 1.8% RE-0.05% Y, B is 1.0% RE-0.05% Y, C is 0.2% RE-0.8% Y, and D is 1.8% RE-0.8% Y.

The invention relates to a die-casting heat resistant magnesium alloy and a preparation method thereof, pertaining to the metal material technology field. The components and weight percentage thereof of the alloy are as follows: 1.5 to 6.0 percent of Sm, 0 to 3.0 percent of Nd, 0 to 2.5 percent of Ca, 0.1 to 2.0 percent of Zn, 0.2 to 0.8 percent of Zr, lower than 0.02 percent of impurity elements, and the rest is Mg. The preparation method of the alloy comprises the following steps: the materials are weighed, and industrial pure Mg is heated under the protection of the mixed gas of N2 and SF6; after Mg is wholly melted, industrial pure Zn, industrial pure Ca and Mg-Sm interalloy and Mg-Nd interalloy are added at the temperature of 650 to 680 DEG C, Mg-Zr interalloy is added at the temperature of 760 DEG C, the temperature is maintained and the mixture is stirred, then the temperature is increased to 780 to 800 DEG C and maintained, after that the temperature is adjusted to 750 to 760 DEG C for refining and maintained for 30min, and when the Mg liquid is cooled to 680 to 700 DEG C, the mixture carries out die casting. The alloy of the invention has excellent tensile strength, yield strength and elongation and creep resistance simultaneously, and has good die-casting performance.

The invention discloses a magnesium alloy with hot cracking resistance and low linear shrinkage, and belongs to the magnesium alloy field. The magnesium alloy is composed of elements of Mg, Al, Zn, Mn, rare earths, Nb and Li, and comprises, by weight, 1.5 to 25 percents of Al, 0.1 to 3.5 percents of Zn, 0.1 to 2.2 percents of Mn, 0.0002 to 16 percents of rare earths, 0.0002 to 4 percents of Nb, 0.0002 to 9 percents of Li, and the balance Mg. According to the magnesium alloy, the structure of Beta phase is changed by adding rare earth elements and the Nb element into the magnesium alloy; grains are refined by adding the Li element; and crystallization latent heat is changed when the magnesium alloy is solidified by the combined action of the elements, so that the heat resistant magnesium alloy which has good mold-filling capacities, low shrinkage rate, good mechanical properties, machinability, mobility and die-casting properties and is suitable for casting is obtained.

The invention discloses a scandium-containing oxidable die-casting aluminium alloy and a preparation method thereof. The aluminium alloy comprises the following components by mass: 1-2 percent of Mn, 1-2 percent of Ni, 1-3 percent of Zn, 0.8-2 percent of Mg, 0.05-0.3 percent of Sc, 0.05-0.2 percent of Zr, 90-95 percent of Al and less than 0.15 percent of Fe and Si impurities. The invention further discloses a structural part containing the aluminium alloy. The aluminium alloy provided by the invention has the advantages of high strength, good anodic oxidation property and good die-casting property, and can be used for manufacturing thin-walled casing members meeting high appearance and performance requirements.

The invention discloses a high-strength inflaming retarding pressure casting magnesium alloy. The high-strength inflaming retarding pressure casting magnesium alloy comprises, by weight percent, 4 to10% of Al, 0.20 to 2.0% of Ca, 0.05 to 0.90% of Zn, 0.10 to 0.50% of Y, 0.10 to 0.60% of Mn, 0 to 1.0% of La, Ce, Pr and Nd mixed rare earth, smaller than 0.003% of Fe, and the balance Mg and inevitable impurities. The magnesium alloy has the excellent pressure casting performance and mechanical performance, the tensile strength of a stretching sample reaches 300 MPa, the yield strength is 230 MPa, the ductility is 10%, the ignition point is high, 800 DEG C flame contact combustion is carried out for 180 s, observing is carried out for 60 s, the surface is softened and is not combusted, and noserious oxidation phenomenon exists; the production cost is low, toxicity and radioactivity are avoided, and the alloy can be applied to fields of car light weight, home decoration, 3C products and the like.

An aluminum alloy for die-casting, a metal case for a portable electrical device, and a method of manufacturing the metal case are disclosed. The aluminum alloy for die-casting includes about 1.95% to about 4.10% by weight of manganese, about 0.1% to about 2.0% by weight of zinc, about 0.3% to about 0.8% by weight of zircon, about 0.03% to about 0.09% by weight of titanium, and a remainder of aluminum. Thus, the aluminum alloy may provide a mechanical property and a glossiness that are appropriate for a case of a portable electrical device.

A magnesium based alloy consisting of, by weight: 2-5% rare earth elements, wherein the alloy contains lanthanum and cerium as rare earth elements and the lanthanum content is greater than the cerium content; 0.2-0.8% zinc; 0-0.15% aluminium; 0-0.5% yttrium or gadolinium; 0-0.2% zirconium, 0-0.3% manganese; 0-0.1% calcium; 0-25 ppm beryllium; and the remainder being magnesium except for incidental impurities.

The invention discloses high-thermal-conductivity die-casting magnesium alloy and a preparation technology thereof. Chemical components of the high-thermal-conductivity die-casting magnesium alloy comprise, by mass, 8-13% of Zn, 0.1-1% of Ca, 0-1% of Mn, 0-1% of La, 0-1% of Ce and the balance Mg, wherein the content of Mn, the content of La and the content of Ce are not zero at the same time. The magnesium alloy is suitable for die casting and has excellent mechanical properties and high thermal conductivity, the thermal conductivity of the magnesium alloy at room temperature can reach about two times that of commonly used die-casting AZ91, and the tensile strength of the magnesium alloy is similar to that of AZ91 magnesium alloy.

The invention belongs to the field of machining of alloy materials and discloses an aluminum alloy pressure-cast door plank. The aluminum alloy pressure-cast door plank is prepared from the following raw materials in percentage by weight: 4.1%-4.3% of magnesium, 1.8%-2.1% of manganese, 0.8%-0.9% of zinc, 0.6%-0.7% of copper, 0.3%-0.4% of nickel, 0.1%-0.2% of white graphite, 0.04-0.05% of cerium, 0.04%-0.05% of yttrium, 0.02%-0.03% of samarium, 0.01%-0.02% of silicon dioxide and the balance of aluminum. The aluminum alloy pressure-cast door plank is high in mechanical strength, can resist corrosion and is unlikely to be oxidized and change color; the preparation method is simple, feasible and suitable for large-scale production.

The invention discloses a heatproof magnesium alloy, which belongs to the magnesium alloy field. The magnesium alloy is composed of Mg, Zn, Zr, rare earth, Nb and Al, and comprises the following components by weight: 0.2-9% of Zn, 0.1-2% of Zr, 0.0002-16% of rare earth, 0.0002-4% of Nb, 0.001-1.49% of Al and the balance of Mg. The rare earth and an Nb element are added in the magnesium alloy, and a structure of a beta phase is changed; the Zr can strongly refine the crystal grain, and is reacted with certain impurity element (such as Si) in an alloy liquid and deposited, and the alloy liquid is purified. The combined effect of the elements enhances the high temperature resistance performance of the magnesium alloy, the heatproof magnesium alloy has excellent mechanical property and machinery processability, and good fluidity and die casting performance, and is suitable for casting the heatproof magnesium alloy and die casting of the heatproof magnesium alloy.

The invention discloses an aluminum alloy capable of being subjected to pressure casting and anodizing. The mass ratio formula of the aluminum alloy is ZnMgMn<c>M<d>Al<e>, wherein M is one or more of Cr, Zr, Cu, Ti, rare earth elements, V, Co, Ni, Sn, Nb, Mo, Fe, Si, B, In, Ca and Be, a is not smaller than 0.1% but not larger than 20%, b is not smaller than 0% but not larger than 4%, c is not smaller than 0.1% but not larger than 4%, d is not smaller than 0% but not larger than 5%, and the balance e. The aluminum alloy capable of being subjected to pressure casting and anodizing is good in fluidity and pressure casting performance and can be easily machined in the later period; a semi-finished product obtained after pressure casting can be subjected to anodizing and colored with various colors, and the aluminum alloy is a high-quality aluminum alloy applied to products with high appearance requirements. By adjusting the ratio, it is guaranteed that while the alloy can be subjected to anodizing, comprehensive performance of the alloy can meet the pressure casting technique, and thin-wall products can be produced.