47results about How to "Eliminate casting stress" patented technology

The invention relates to a near co-crystallizing type casting aluminum silicon alloy material with high heat conductivity and a production method thereof. The alloy comprises the main components including Al and Si, and is characterized by also comprising at least one of Sr, Ca and B. During casting production, the temperature of a melt is maintained within a range of 600-850 DEG C, and the alloy melt is cast into a casting mould so as to be cast into a casting; when the casting product is subjected to heat treatment, the temperature rising velocity of the heat treatment process is lower than 20 DEG C / min, and the temperature is maintained to be 100-450 DEG C and maintained for 0.5-10 hours, and then, the casting is cooled or air-cooled along with a furnace.

The invention relates to a production method of 3003-brand cathode aluminum foil, which includes the following steps: a. raw materials are refined and rolled into a blank with the thickness of 6.5 mm The invention relates to a production method of 3003-brand cathode aluminum foil, which includes the following steps: a. raw materials are refined and rolled into a blank with the thickness of 6.5 mmts a contribution for the trade progress.es a contribution for the trade progress.o 8.5 mm; b. the blank obtained in step a is rolled into the blank with the thickness of 3.5 mm to 4.3 mm in a cooling mode to be uniformly annealed; c. the uniformly-annealed blank is rolled into thto 8.5 mm; b. the blank obtained in step a is rolled into the blank with the thickness of 3.5 mm to 4.3 mm in a cooling mode to be uniformly annealed; c. the uniformly-annealed blank is rolled into the blank with the thickness of 0.3 mm to 0.5 mm in a cooling mode to be recrystallized and annealed; and d. the recrystallized-and-annealed blank is rolled into the 3003-brand cathode aluminum foil wite blank with the thickness of 0.3 mm to 0.5 mm in a cooling mode to be recrystallized and annealed; and d. the recrystallized-and-annealed blank is rolled into the 3003-brand cathode aluminum foil with the required thickness. The method of the invention enables the cost to be lower and the product quality to be better, the specific capacitance of the product is increased to be higher than 530 micrh the required thickness. The method of the invention enables the cost to be lower and the product quality to be better, the specific capacitance of the product is increased to be higher than 530 microfarads / cm<2>, and the highest specific capacitance can be 560 microfarads / cm<2>. The invention greatly improves the product competitive strength, reduces the disparity with abroad products, and makofarads / cm<2>, and the highest specific capacitance can be 560 microfarads / cm<2>. The invention greatly improves the product competitive strength, reduces the disparity with abroad products, and make

The invention relates to a preparation method of a 5A06H14 sheet metal with a thickness of 8.5mm. The invention relates to a sheet metal and a preparation method thereof. The invention aims at solving the problems of unstable alloy ingot strength, low yield strength, low tensile strength, and large unevenness of 8.5mm-thick 5A06H14 sheet metals produced with prior arts. The preparation method comprises the steps of: 1, material blending; 2, smelting; 3, casting; 4, homogenizing annealing; 5, sawing, edge planing and surface milling; 6, aluminum coating; 7, hot rolling; 8, cold rolling; 9, pre-stretching; and 10, sawing. With the steps, the 8.5mm-thick 5A06H14 sheet metal is obtained. With the method provided by the invention, the prepared 8.5mm-thick 5A06H14 sheet metal has a yield strength of 373-420MPa, a tensile strength of 285-330MPa, an elongation of 8% to 12%, an unevenness less than 8mm / m, and a same plate difference less than 0.25mm. The method provided by the invention is applied in industrialized productions of 5A06 sheet metals.

The invention relates to a method for preparing alloy, in particular to a method for preparing Cu-Fe alloy under action of a magnetic field. The method comprises the following steps: (1) preparing cast state Cu-Fe mother alloy; (2) solidifying the Cu-Fe alloy under the action of 0.1 to 20T static magnetic field; (3) homogenizing the alloy under the action of the static magnetic field; (4) hot forging at the temperature of between 650 and 750 DEG C; (5) drawing; (6) annealing the alloy under the static magnetic field; (7) re-drawing; (8) repeating thermomechanical magnetic treatment; and (9) annealing the alloy under the action of a gradient magnetic field. By using the method, the strong magnetic energy and strong alignment of the static magnetic field are sufficiently utilized, the strong magnetic force and other characteristics of the gradient magnetic field are combined, the matching relationship between the conductivity and tensile strength of the Cu-Fe alloy is effectively optimized, and a Cu-Fe alloy wire with conductivity of 56-78 % IACS and the tensile strength of 750-1,450MPa can be obtained.

The invention provides high-toughness casting Fe-Cr-Mo-based high-damping alloy. The alloy contains 0.05-0.8% of Zr in percentage by mass. Preferably, the alloy comprises the following components in percentage by mass: 13-17% of Cr, 1-4% of Mo, 0.3-1.5% of Si, 0.3-1.0% of Mn, 0-2.0% of Ni, 0.05-0.8% of Zr and the balance of Fe. The preparation method of the high-toughness casting Fe-Cr-Mo-based high-damping alloy comprises the following steps: weighing raw materials according to the components and the component ratio of the high-toughness casting Fe-Cr-Mo-based high-damping alloy; carrying out vacuum induction melting and pouring to obtain an alloy casting; and carrying out damping heat treatment on the alloy casting to obtain the high-toughness casting Fe-Cr-Mo-based high-damping alloy. During vacuum induction melting, a Zr source is added in the later stage of refining under the condition of vacuum. On the premise of not reducing damping property, the toughness of the Fe-Cr-Mo-based damping alloy can be greatly improved.