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Preparation method of large-size aluminum alloy ingot

An aluminum alloy ingot, large-scale technology, applied in the field of preparation of aluminum alloy ingot, can solve the problems of difficult forming, easy cracking, etc., achieve the effect of good surface quality, increase plasticity, and improve castability

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 in 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 0.20%, Fe: 0.02% to 0.30%, Cu: 3.8%-4.9%, Mn: 0.3%-0.9%, Mg: 1.2%-1.8%, Cr: 0.01%-0.10%, Zn: 0.01%-0.25%, Ti: 0.01%-0.15% , Al: 91.40% ~ 94.64% and Fe>Si Weigh aluminum ingots, electrolytic copper, magnesium ingots, zinc ingots, aluminum-silicon master alloys, aluminum-iron master alloys, aluminum-manganese master alloys, aluminum-chromium master alloys and aluminum-titanium master alloys Alloy; 2. Take 1# flux and covering agent, wherein the quality of 1# flux is 0.5%~0.6% of the total mass of all materials weighed in step 1, and the quality of covering agent is all materials weighed in step 1 0.5% to 0.6% of the total mass; 3. Weigh the 1# flux in step 2 and spread it evenly on the bottom of the melting furnace, and then add the ma...

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.

[0021] In this embodiment, both KCl and NaCl are commercially available.

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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 solving the problems of easy cracking and difficult forming 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.1 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 in the smelting furnace are smelted; adding magnesium ingots and then smelting; then 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 prepared ingot is 500-600mm, the width is 600mm, and the length is 2,000-3,500mm. The ingot has no cracks, good surface quality and uniform internal grains, and the yield is not smaller than 90.5 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): C22C1/03C22C21/08B22D21/04C22B21/06
Inventor 吕新宇王英君张浩然刘显东郑力王立娟徐忠艳祁艳华腾志贵
Owner NORTHEAST LIGHT ALLOY CO LTD
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