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Preparation method of large-size aluminum alloy ingot

An aluminum alloy ingot, large-scale technology, applied in the field of aluminum alloy ingot preparation, can solve the problems of difficulty in forming and easy cracking, and achieve the effects of flat liquid cavity, flat surface, and inhibition of cold cracks

Active Publication Date: 2010-09-15
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the existing aluminum alloy ingot preparation method is used to prepare large-scale aluminum alloy ingots with a thickness of 500 mm to 600 mm, which is easy to crack and difficult to form, and provides a large-scale aluminum alloy ingot. Ingot preparation method

Method used

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  • Preparation method of large-size aluminum alloy ingot

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specific Embodiment approach 1

[0014] Specific Embodiment 1: The preparation method of a large-scale aluminum alloy ingot according to this embodiment is carried out according to the following steps: 1. According to the mass percentage of elements in the aluminum alloy ingot, Si: 0.01% to 0.12%, Fe: 0.02% to 0.15%, Cu: 2.0%-2.6%, Mn: 0.01%-0.10%, Mg: 1.9%-2.6%, Cr: 0.01%-0.04%, Zn: 5.7%-6.7%, Ti: 0.01%-0.06% , Zr: 0.08-0.15%, Al: 87.48%-90.26% and make Fe>Si respectively weigh aluminum ingot, electrolytic copper, magnesium ingot, zinc ingot, aluminum-silicon master alloy, aluminum-iron master alloy, aluminum-manganese master alloy, Aluminum-chromium master alloy, aluminum-titanium master alloy and zirconium compound salt; 2. Take 1# flux and covering agent, wherein the quality of 1# flux is 0.5% to 0.6% of the total mass of all materials weighed in step 1, covering The quality of the flux is 0.5% to 0.6% of the total mass of all materials weighed in step 1; 3. Weigh 1# flux through step 2 and spread it even...

specific Embodiment approach 2

[0018] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the 1# flux described in step two is made of 50% KCl, 26% NaCl and 24% NaAlF by weight percentage 6 Composition of mixed powder. Others are the same as in the first embodiment.

[0019] In this embodiment, KCl, NaCl and NaAlF 6 All are commercially available.

specific Embodiment approach 3

[0020]Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the covering agent in step 2 is a mixed powder composed of 50% KCl and 50% NaCl by weight. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a large-size aluminum alloy ingot, relating to a preparation method of aluminum alloy ingots, and the provided preparation method of a large-size aluminum alloy ingot solves the problem of easy cracking during preparing the large-size aluminum alloy ingots by the traditional aluminum alloy ingot preparation method. The method comprises the following steps of: spreading and scattering a NO. flux at the bottom of a smelting furnace; adding aluminum ingots, electrolytic copper, zinc ingots, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy, aluminum-manganese intermediate alloy, aluminum-chromium intermediate alloy and aluminum-titanium intermediate alloy into the smelting furnace and spreading and scattering a covering agent; heating to ensure that the materials are smelted, sequentially adding a zirconium composite salt and magnesium ingots as well as smelting and refining to obtain an aluminum alloy melt; filtering the aluminum alloy melt and then pouring into a crystallizer; and finally, obtaining the large-size aluminum alloy ingot through casting. The thickness of the ingot prepared by using the method is 500-600mm, the width is 1,600mm, and the length is 1,500-2,500mm. The ingot has no cracks, good surface quality and uniform internal grains, and the yield is not smaller than 65 percent.

Description

technical field [0001] The invention relates to a method for preparing an aluminum alloy ingot. Background technique [0002] In order to increase productivity, especially to meet the needs of large-scale processing materials, the size of the ingot is required to be larger and larger. In the 1950s, the thickness of high-alloyed aluminum alloy ingots (slabs) did not exceed 300mm. By the end of the last century, it increased to 400mm. In this century, it increased to 500mm-600mm. However, the existing aluminum alloy ingots When the preparation method is used to prepare large-scale aluminum alloy ingots with a thickness of 500mm to 600mm, due to the large size, it is easy to crack, making forming difficult, and becoming a bottleneck problem restricting the development of high-strength aluminum alloys. Contents of the invention [0003] The present invention aims to solve the problem that the existing aluminum alloy ingot preparation method is used to prepare large-scale alum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/02B22D11/00B22D7/00B22D21/04
Inventor 王英君何振波金龙兵刘洪雷王志超郝志刚王立娟李海仙张云龙
Owner NORTHEAST LIGHT ALLOY CO LTD
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