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

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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-

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Specific embodiment one: the manufacturing method of a kind of Sc-containing high Mg aluminum alloy slab ingot of the present embodiment is carried out according to the following steps:

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

[0025] 2. Smelting: According to the order of aluminum ingot, Al-Zr master alloy and Al-Mn master alloy, the raw materials are put into the resistance reverberatory furnace for melting. When the melt temperature reaches 800℃~810℃, the temperature is 800℃ Under the constant temperat...

Example Embodiment

[0040] Embodiment 2: The difference between this embodiment and Embodiment 1 is: 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%, The Ti content of 0.03% and the balance of Al were weighed to take aluminum ingots, Al-Zr master alloys, Al-Mn master alloys, Al-Sc master alloys, magnesium ingots and Al-Ti master alloys. Other steps and parameters are the same as in the first embodiment.

Example Embodiment

[0041] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is: in step 1, 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 The aluminum ingot, Al-Zr master alloy, Al-Mn master alloy, Al-Sc master alloy, magnesium ingot and Al-Ti master alloy were weighed for 0.02% and the balance of Al. Other steps and parameters are the same as in the first or second embodiment.

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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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