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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.

Inactive Publication Date: 2011-04-20
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for manufacturing a superhard aluminum alloy ingot in order to solve the problem of low yield due to inner wall cracks in the ingot prepared by the existing casting method

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0009] Specific Embodiment 1: In this embodiment, a method for manufacturing a superhard aluminum alloy ingot can be realized according to the following steps: 1. Weighing ingredients: Cu: 1.4% to 2.0% and Mn: 0.2% to 0.6%, Mg: 1.8% ~ 2.8%, Cr: 0.1% ~ 0.25%, Zn: 5.0% ~ 7.2%, Fe: ≤0.3%, Si: ≤0.15%, the balance is Al, respectively weighed pure magnesium ingots , aluminum-manganese master alloy, aluminum-chromium master alloy, aluminum-silicon master alloy, aluminum-iron master alloy, electrolytic copper, aluminum-zinc master alloy and aluminum ingots for remelting; 2. Put the ingredients weighed in step 1 into the resistance reverberatory furnace For smelting, under the condition of 700-750°C, convective stirring from both sides of the furnace door for 10-15 minutes to form a melt; 3. Scoop 5-20mL melt from half the depth of the melt for chemical composition testing. After the chemical composition conforms to the elemental composition described in step 1, the melt is introduced ...

specific Embodiment approach 2

[0010] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the mass percentages of elements in step 1 are Cu: 1.6% to 1.8%, Mn: 0.3% to 0.5%, Mg: 2.0% to 2.5%, Cr : 0.15% to 0.2%, Zn: 5.5% to 6.5%, Fe: 0.01% to 0.28%, Si: 0.02 to 0.12%, and the balance is Al. Weigh pure magnesium ingots, aluminum-manganese intermediate alloys, and aluminum-chromium intermediates alloy, aluminum-silicon master alloy, aluminum-iron master alloy, electrolytic copper, aluminum-zinc master alloy and aluminum ingot for remelting. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0011] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 2, convective stirring is performed at 710-740° C. for 12-14 minutes. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a manufacture method of extra super duralumin alloy cast ingots, relating to a manufacture method of cast ingots. The invention aims at solving the problem of low yield due to the inner wall crack of the cast ingots manufactured by the existing casting method. The manufacture method of the extra super duralumin alloy cast ingots comprises the following steps: weighting raw materials, feeding the argon to refine after smelting, and manufacturing the extra super duralumin alloy cast ingots through the semi-continuous casting method. By using the casting method disclosed by the invention, the brittlement region of the aluminum alloy cast ingots is reduced, the heating crack resistance of the alloy is enhanced, the casting stress is reduced, and the casting performance of the extra super duralumin alloy is improved. The molding rate of the cast ingot reaches 62.3% and is enhanced by 7.3%, and the yield reaches 74.1% and is enhanced by 11.8% compared with that of the prior art. The manufacture method disclosed by the invention can be used in the field of manufacturing important structural elements.

Description

technical field [0001] The invention relates to a method for manufacturing an ingot. Background technique [0002] Superhard aluminum alloy has high specific strength and excellent comprehensive performance, and is an important structural material in the industrial sector. However, cracks in the inner wall of the superhard aluminum alloy hollow ingot are prone to occur during the casting process. Superhard aluminum alloy itself is a high-strength and low-plastic alloy. From the perspective of preventing cracks on the inner wall of the ingot, in addition to improving the purity of the melt and reasonably controlling the chemical composition, it is also very important to choose a reasonable core taper. [0003] In the semi-continuous casting process of aluminum alloy pipes, in order to prevent the core from being hugged when the ingot shrinks, the core should generally have a certain taper. If the taper is too small, the inner hole of the ingot will shrink and cause radial c...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03
Inventor 李海仙张浩然韩华郝志刚滕志贵赫微曹永亮王强
Owner NORTHEAST LIGHT ALLOY CO LTD
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