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Manufacturing method for flat Sc-containing high-Mg aluminum alloy cast ingot

A manufacturing method and aluminum alloy technology, which are applied in the manufacturing field of high-Mg aluminum alloy flat ingots, can solve the problems of low strength and easy softening strength, and achieve the advantages of reducing hydrogen content and alkali metals, improving mechanical properties, and improving alloy strength. Effect

Inactive Publication Date: 2016-09-21
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of easy softening and low strength of existing Al-Mg-Mn alloys at high temperatures, and to provide a method for manufacturing high-Mg aluminum alloy flat ingots containing Sc

Method used

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  • Manufacturing method for flat Sc-containing high-Mg aluminum alloy cast ingot
  • Manufacturing method for flat Sc-containing high-Mg aluminum alloy cast ingot
  • Manufacturing method for flat Sc-containing high-Mg aluminum alloy cast ingot

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specific Embodiment approach 1

[0023] Embodiment 1: A method for manufacturing a Sc-containing high Mg aluminum alloy slab ingot according to the present embodiment is carried out according to the following steps:

[0024] 1. Weigh the smelting raw materials: ①According to the mass percentage of each element: Mn is 0.15%-0.4%, Mg is 5.8%-6.4%, Sc is 0.2%-0.3%, Zr is 0.1%-0.18%, and Ti is 0.02% %~0.04% and the balance of Al weigh aluminum ingots, Al-Zr master alloys, Al-Mn master alloys, Al-Sc master alloys, magnesium ingots and Al-Ti master alloys; ②According to the quality of Al-Be master alloys The ratio to the total mass of the smelting raw materials weighed is (1~3):9×10 3 Weigh the Al-Be master alloy;

[0025] 2. Melting: According to the order of aluminum ingots, Al-Zr master alloys and Al-Mn master alloys, the raw materials are put into the resistance reverberatory furnace for melting. Under the condition of constant temperature of ℃~810℃, first add Al-Sc master alloy, then add magnesium ingot, Al-...

specific Embodiment approach 2

[0040] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, according to the mass percentage of each element: Mn is 0.3%, Mg is 6.2%, Sc is 0.22%~0.26%, Zr is 0.14%, Ti is 0.03% and the balance of Al is weighed as aluminum ingot, Al-Zr master alloy, Al-Mn master alloy, Al-Sc master alloy, magnesium ingot and Al-Ti master alloy. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0041] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step one, according to the mass percentage of each element: Mn is 0.3%, Mg is 6.25%, Sc is 0.25%, Zr is 0.14%, Ti Weigh aluminum ingots, Al-Zr master alloys, Al-Mn master alloys, Al-Sc master alloys, magnesium ingots and Al-Ti master alloys with 0.02% and the rest of Al. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a manufacturing method for a flat Sc-containing high-Mg aluminum alloy cast ingot and aims to solve the problem that a conventional Al-Mg-Mn alloy is easily softened at a high temperature and has low strength. The method comprises the following steps: 1, weighing of melting raw materials; 2, melting; 3, refining; and 4, casting. According to the method, a reasonable melting and casting technological process is selected, so that the components of a molten aluminum alloy are more uniform and stable; the strength of the alloy is improved, and the detect that the conventional high-Mg aluminum alloy is easily softened when heated is overcome; the mechanical properties of the alloy are effectively improved; and through reasonable control over the three major parameters of speed, temperature and water flow in a casting process, the large-sized flat Sc-containing high-Mg aluminum alloy cast ingot, which is free of tension fracture and has acceptable internal quality, is produced, and the large-sized flat Sc-containing high-Mg aluminum alloy cast ingot can be widely applied to the fields of national defense, aviation and aerospace, ship and the like.

Description

technical field [0001] The invention relates to a method for manufacturing a Sc-containing high-Mg aluminum alloy flat ingot. Background technique [0002] Al-Mg-Mn alloy is a heat treatment non-strengthenable alloy, which has excellent corrosion resistance, high specific strength, good plasticity and weldability, and also has excellent thermal and electrical conductivity. Al-Mg-Mn alloys are mainly used to make containers, components, water pipes, decorative items, etc. Al-Mg-Mn alloys are the most widely used in aluminum welded structures, and are favored in aerospace, vehicle manufacturing, electrical and electronics and other fields. [0003] However, Al-Mg-Mn alloys still have disadvantages such as easy softening at high temperatures and low strength. Therefore, it is of great significance to develop an Al-Mg-Mn alloy that has high strength at high temperatures and is not easy to soften. Contents of the invention [0004] The purpose of the invention is to solve the...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C1/03C22C1/06B22D11/116B22D11/00
CPCC22C21/06B22D11/003B22D11/116C22C1/026C22C1/03C22C1/06
Inventor 孙海波吕新宇李欣斌殷云霞胥健秋滕志贵金磊韩再旭刘学
Owner NORTHEAST LIGHT ALLOY CO LTD
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