34results about How to "Reduce ear rate" patented technology

The invention relates to an engineering process for producing a low-iron low-silicon 3004 alloy by directly cast-rolling electrolytic aluminium liquid. The process comprises the procedures of alloy aluminium melting, ingredient adjusting, on-line refining for three times, standing, outgassing, grain refining, filtering, tilting cast-rolling, homogenizing, cold rolling, intermediate annealing, another cold rolling, full annealing, recoiling and packaging. The refining comprises powder spraying refining in a melting furnace and combined refining of on-line argon and carbon tetrachloride introducing. The annealing comprises high-temperature quick annealing, the intermediate annealing and the full annealing. During the cast-rolling, the temperature in a front box is 710-720 DEG C, and the cast-rolling speed is 600-900 mm/min. The product is the low-iron low-silicon 3004 alloy. The low-iron low-silicon 3004 alloy comprises 0.06-0.14 wt% of Si, 0.25-0.43 wt% of Fe, 0.012-0.14 wt% of Cu, 1.0-1.2 wt% of Mn, 0.8-1.0 wt% of Mg, at most 0.02 wt% of Zn, 0.015-0.03 wt% of Ti and the balance of Al. The invention has the characteristics of simple procedure, energy saving, emission reduction, goodalloy performance and low earring rate.

The invention provides a new method for preparing aluminium alloy plates and strips for deep drawing, in particular to a multiple-energy-field asymmetric sunken type cast-rolling method. The method comprises the steps of leading a refined aluminium alloy melt into a roller gap of a cast-rolling mill having electromagnetic/ultrasonic composite energy fields through asymmetric casting nozzles which are installed in a sunken mode, under the effects of stirring and vibrating impacting of the electromagnetic/ultrasonic composite energy fields, climbing, returning and stirring of the aluminium melt in a cast-rolling area and forced cooling and rolling deformation of rollers, strengthening heat transfer, mass transfer and energy conversion of the cast-rolling area, achieving crystal nucleus propagation, and changing solidification behavior, so that the aluminium alloy plates and strips are produced through cast-rolling continuously. The aluminium alloy plates and strips prepared by the method are bright and clean in plate surface, neat in edge, small and uniform in grain, low in anisotropism and excellent in deep drawing performance, and the method is short in whole production flow, high in efficiency, low in product cost, high in product quality and applicable to batch production of the aluminium alloy plates and strips for the deep drawing.

The invention relates to a production method of aluminum plates and aluminum strips for cosmetic mirror surface aluminum caps. The manufacturing process comprises the steps of smelting, casting, homogenizing treatment, hot rolling, cold rolling, intermediate annealing and cold rolling of finished products. In the smelting process, a bottom-mounted electromagnetic stirring system is adopted; in the casting process, an automatic speed regulation system is adopted; in the hot rolling system, a hot rough rolling pass automatic distribution system is adopted; and in the intermediate annealing system, a large natural gas furnace is adopted for annealing. Through cooperation of all the procedures, product ingredients can be made uniform, and finished products are uniform in surface roughness, fine, smooth, good in smooth finish, free of surface defects such as stripes, black lines and color difference; the mirror surface effect is good after materials are subjected to anodic oxidation and electroplating, and the application requirements for deep drawing and tensile properties of the aluminum plates and the aluminum strips for the cosmetic mirror surface aluminum caps are met.

The present invention provides an aluminum alloy sheet for press forming, said aluminum alloy sheet being made of an aluminum alloy that contains 0.4 to 1.5 mass% of Si and 0.3 to 1.0 mass% of Mg with the balance being Al and unavoidable impurities and exhibiting a ratio (P(%)) of ΔL to L0 of 2.0% or less [wherein: L0 is the length of a diagonal line lying at an angle of 0º to the rolling direction in an indentation formed by a Vickers hardness tester; and ΔL is a difference between L0 and the length (L45) of a diagonal line lying at an angle of 45º to the rolling direction therein]. Further, the present invention provides a process for manufacturing the aluminum alloy sheet and a press-formed product thereof.

The invention discloses a preparation method of an aluminium alloy strip for the stamping and stretch forming of a cell phone shell. The preparation method comprises the following steps of: smelting, pouring, homogenizing annealing, hot rolling and cold rolling. By optimizing the alloying components, formulating and optimizing the homogenizing annealing technology after pouring and accurately controlling the temperatures of hot rolling and cold rolling, the performances of the designed alloy can be fully realized, namely the comprehensive mechanical property of the aluminium alloy strip is excellent, the room temperature tensile strength is 285-320MPa, the elongation rate is more than 25% and the cupping test value is more than 10nm. Therefore, the aluminium alloy strip can fully meet the use demand of the stamping and stretch forming of the cell phone shell.

The present invention reduces the cost of production of a cold-rolled aluminum alloy sheet to be used as a material for bottle cans and reduces the width-direction unevenness of earing. This cold-rolled aluminum alloy sheet for bottle cans has a specific composition and has a structure which contains a small amount of dispersed particles having a center-of-gravity diameter less than 1 [mu]m, which represent an a phase, and in which the ratio of the amount of the ss phase that is an Al6(Fe,Mn)-based intermetallic compound to the amount of the a phase that is an Al-Fe-Mn-Si-based intermetallic compound is 0.50 or more in terms of the ratio of the maximum height Hss of the X-ray diffraction peaks and the maximum height Ha of the X-ray diffraction peaks, Hbeta/Halpha. Thus, the hot-rolled sheet in the invention has an even degree of recrystallization in the sheet-width direction, and the cold-rolled aluminum alloy sheet has low width-direction unevenness of earing.

The invention discloses a processing method of a 1050 aluminum alloy drug cap material. A drug cap material product is obtained after heating, hot rolling, cold rolling, cleaning, trimming and finished product inspection are carried out on a sawn and milled cast ingot; wherein intermediate annealing process treatment is carried out in the cold rolling process, the intermediate annealing process comprises two stages of annealing processes, the temperature of the first stage of annealing is 455 DEG C-465 DEG C, the time of the first stage of annealing is 6.5 H-7.5 h, the temperature of the second stage of annealing is 415 DEG C-425 DEG C, and the time of the second stage of annealing is 4.5 h-5.5 h; and the finish rolling temperature of hot rolling is 295 DEG C-310 DEG C, and the cold rolling pass processing rate after the intermediate annealing process is 80%-85%. By means of the processing method, the tensile strength of the 1050 aluminum alloy drug cap material can be improved, the earing rate can be reduced, and the requirements of customers for the performance of the drug cap material can be met.

Provided is an aluminum alloy for DR can bodies, the alloy having a low earing rate and excellent deep drawing properties even when a batch furnace is used, and a manufacturing method therefor. An aluminum alloy sheet for DR can bodies and a manufacturing method therefor, the aluminum alloy sheet being obtained from an aluminum alloy containing Si: 0.10-0.60 mass% (% below), Fe: 0.10-0.80%, Cu: 0.05-0.25%, Mn: 0.80-1.50%, Mg: 0.80-1.30% and the remainder being obtained from Al and unavoidable impurities and the aluminum alloy sheet being made into a final sheet after passing from an ingot of said aluminum alloy to a hot-rolled sheet and to a process-annealed sheet. In the final sheet, the cube orientation density (CubeO) is 2.00 or more times the random orientation density and the ratio (CubeO/SO) of CubeO to the S orientation density (SO) is 0.40-1.00. After baking, the aluminum alloy sheet has a yield strength of 180-220 MPa and a tensile strength of at least 230 MPa.

The invention belongs to the technical field of aluminum strip calendering manufacturing, and discloses a low-earing and low-hardness capacitor shell and a preparation method thereof. The low-earing and low-hardness capacitor shell comprises the following components in percentage by mass: 0.1% of Si, 0.18-0.28% of Fe, not greater than 0.03% of Cu, not greater than 0.01% of Mn, not greater than 0.03% of Zn, not greater than 0.03% of Ti, and the balance Al. The process flow comprises such steps as smelting, cast rolling, rough rolling, edge cutting, finish rolling and finished product annealing;and the prepared capacitor shell is 75-85Mpa in tensile strength, can reach the elongation above 30%, is excellent in machining performance, low in strength, excellent in plasticity, high in elongation and low in earing rate, and greatly improves the machining efficiency.

Provided are: an aluminum alloy plate for can ends, which is an aluminum alloy material suitable for can ends and has high strength, a small strength anisotropy and a low earing ratio; and a method for manufacturing the aluminum alloy plate at low cost. An ingot of an alloy is subjected to a homogenization treatment at 450 to 530 DEG C inclusive for 0.5 to 15 hours inclusive, and subsequently the homogenized ingot is subjected to a hot rolling procedure, wherein the alloy comprises, in mass%, 0.01 to 0.2% inclusive of Si, 0.01 to 0.35% inclusive of Fe, 0.01 to 0.15% inclusive of Cu, 0.2% or more and less than 0.5% of Mn, 4.0% or more and less than 5.5% of Mg and a remainder made up by Al and unavoidable impurities, and wherein the hot rolling is carried out in such a manner that the total rolling reduction ratio in the hot finish rolling becomes 88 to 94% inclusive, the strain rate during the final pass becomes 60 to 130 sec-1 inclusive and the finishing temperature becomes 310 to 370 DEG C inclusive. Subsequently, the resultant product is subjected to a cold rolling procedure at a cold rolling reduction ratio of 84 to 94% inclusive without carrying out annealing until the thickness of a final product reaches a final thickness, whereby the final product having the final thickness is produced.

The invention discloses an aluminum alloy strip for a bottle type easy open can with a threaded mouth and a manufacturing method for the aluminum alloy strip. The aluminum alloy strip is prepared from the following chemical components in parts by mass: 0.20-0.40wt% of Si, 0.35-0.55wt% Fe, 0.10-0.25wt% of Cu, 0.80-1.10wt% of Mn, 1.00-1.30wt% of Mg, 0.010-0.030wt% of Ti and the balance of Al and inevitable impurities. The prepared aluminum alloy strip for the bottle type easy open can with the threaded mouth is low in earing ratio, high in strength and good in deep drawing and tensile properties and formability.

The invention discloses an aluminum alloy material for new energy power battery shells and covers and application of the aluminum alloy material, and relates to the technical field of new energy batteries. The aluminum alloy material is composed of following element components including Si, Mg, Sr, Mn, Be, Zr, Sb, Er, Pr, Tb, Dy, B, Ga and Al. An aluminum alloy for the new energy power battery shells and covers is excellent in comprehensive performance; the components, content and preparation process of the aluminum alloy are overall improved and optimized, the application performance of prepared new energy power battery shell and cover products is improved remarkably, substantive breakthroughs are achieved especially on the index aspects of tensile strength, prescribed non-proportional extension strength, percentage elongation after fracture, stability, punching performance and welding performance, and the application occasion and field are wide; and the active demands of the new energy market for high-performance power battery cover and shell products can be greatly met.