Manufacture method of extra super duralumin alloy cast ingots
An aluminum alloy ingot and manufacturing method technology, applied in the field of ingot manufacturing, can solve the problems of low yield and inner wall cracks of the ingot, and achieve the effects of improving the ability to resist hot cracks, improving the casting performance, and improving the casting performance.
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[0009] Specific embodiment 1: The method of manufacturing a super-hard aluminum alloy ingot of this embodiment can be realized by the following steps: 1. Weighing ingredients: Cu: 1.4% ~ 2.0%, Mn: 0.2% ~ by mass percentage of elements 0.6%, Mg: 1.8% to 2.8%, Cr: 0.1% to 0.25%, Zn: 5.0% to 7.2%, Fe: ≤0.3%, Si: ≤0.15%, the balance is Al, weigh the pure magnesium ingots separately , Aluminum-manganese intermediate alloy, aluminum-chromium intermediate alloy, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy, electrolytic copper, aluminum-zinc intermediate alloy and aluminum ingot for remelting; 2. Load the ingredients weighed in step 1 into the resistance reverberatory furnace For smelting, stir convectively from both sides of the furnace doors for 10-15 minutes at 700-750℃ to form a melt; 3. Scoop 5-20mL of the melt from half the depth of the melt for chemical composition testing. When the melt is in After the chemical composition meets the elemental compositi...
Example Embodiment
[0010] Specific embodiment two: this embodiment is different from specific embodiment one in that the mass percentages of elements in step one are Cu: 1.6%~1.8%, Mn: 0.3%~0.5%, Mg: 2.0%~2.5%, Cr :0.15%~0.2%, Zn: 5.5%~6.5%, Fe: 0.01%~0.28%, Si: 0.02~0.12%, the balance is Al, weigh pure magnesium ingot, aluminum manganese intermediate alloy, aluminum chromium intermediate Alloys, aluminum-silicon master alloys, aluminum-iron master alloys, electrolytic copper, aluminum-zinc master alloys and aluminum ingots for remelting. The other steps and parameters are the same as in the first embodiment.
Example Embodiment
[0011] Specific embodiment three: This embodiment is different from specific embodiment one or two in that in step two, convective stirring is carried out at 710-740°C for 12-14 min. The other steps and parameters are the same as in the first or second embodiment.
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