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A manufacturing method of aluminum alloy large-size flat ingot for ship hull

An aluminum alloy and large-size technology, which is applied in the field of manufacturing aluminum alloy large-size flat ingots, can solve the problems of poor mechanical strength, corrosion resistance, and low service life, so as to reduce cracking waste, reduce ship weight, and save energy consumption Effect

Active Publication Date: 2018-07-10
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 purpose of the present invention is to solve the problems of poor mechanical strength, corrosion resistance and low service life of the aluminum alloy large-size slab ingots for ship hulls produced by the existing method, and to provide a large-size slab of aluminum alloy for ship hulls. Ingot Manufacturing Method

Method used

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  • A manufacturing method of aluminum alloy large-size flat ingot for ship hull
  • A manufacturing method of aluminum alloy large-size flat ingot for ship hull
  • A manufacturing method of aluminum alloy large-size flat ingot for ship hull

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specific Embodiment approach 1

[0021] Specific Embodiment 1: A large-scale slab cast ingot of an aluminum alloy for a ship hull described in this embodiment is composed of 0.7% to 1.1% Mn, 5.5% to 6.5% Mg, 0.03% to 0.15% Zr, and 0.10% by weight. % to 0.30% Er and the rest of Al are made as smelting raw materials; the impurity Si and Fe in the large-size slab ingot of aluminum alloy for ship hull are less than 0.4% by weight, the impurity Zn is less than 0.2% by weight, and the impurity The weight percentage of Cu, Ni and Cr is less than 0.1%.

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the aluminum alloy large-size slab ingot for ship hull is composed of 0.9% Mn, 6.2% Mg, 0.09% Zr, 0.22% Er and the balance by weight percentage Al is made as a smelting raw material. Other steps and parameters are the same as in the second embodiment.

specific Embodiment approach 3

[0023] Specific embodiment three: The manufacturing method of the aluminum alloy large-size slab ingot for the hull of a ship as described in the specific embodiment one is realized in the following steps:

[0024] 1. Weigh 0.7% to 1.1% of Mn, 5.5% to 6.5% of Mg, 0.03% to 0.15% of Zr, 0.10% to 0.30% of Er and the rest of Al in percentage by weight. Put into different containers, stand-by; The Mn of described 0.7%~1.1% is realized by weighing aluminum-manganese master alloy, and the Mg of described 5.5%~6.5% is realized by weighing metal magnesium, and the Mn of described 0.03% to 0.15% of Zr is achieved by weighing an aluminum-zirconium master alloy, the 0.10% to 0.30% of Er is achieved by weighing an aluminum-erbium master alloy, and the Al is achieved by weighing an aluminum ingot;

[0025] 2. Preparation of aluminum alloy melt: first add the weighed aluminum ingot into the resistance reverberatory furnace, then add aluminum-manganese master alloy and aluminum-zirconium mast...

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Abstract

The invention provides a method for manufacturing an aluminum alloy large-sized flat ingot for a ship body, relates to a manufacturing method for the aluminum alloy large-sized flat ingot, and aims to solve the problem that an aluminum alloy large-sized flat ingot which is prepared according to a conventional preparation method and used for the ship body is poor in mechanical strength and corrosion resistance, and short in service life. The aluminum alloy large-sized flat ingot provided by the invention is prepared from the following raw materials for smelting in percentage by weight: 0.7-1.1% of Mn, 5.5-6.5% of Mg, 0.03-0.15% of Zr, 0.10-0.30% of Er and the balance of Al. The preparation method provided by the invention comprises the following steps: 1, weighing certain amount of such five elements of Mn, Mg, Zr, Er and Al; 2, preparing an aluminum alloy melt; and 3, carrying out semi-continuous casting to obtain the aluminum alloy large-sized flat ingot. The aluminum alloy large-sized flat ingot is applicable to the ship body.

Description

technical field [0001] The invention relates to a method for manufacturing an aluminum alloy large-size flat cast ingot. Background technique [0002] With the continuous progress of the development of science and technology, the shipbuilding industry has a new development direction in terms of improving manufacturing quality and reducing energy consumption. The lightweight of the ship hull is an important field of ship lightweight. When the aluminum alloy hull has the same strength as the steel hull, its quality is much lower than that of the steel hull. Steel ships are easier to speed up and slide, sail more smoothly and comfortably, and operate more flexibly. In practical applications, the advantages of marine aluminum alloys are very obvious. However, the aluminum alloy large-size slab ingot for ship hull manufactured by the existing method has the problems of poor mechanical strength, corrosion resistance and low service life. Contents of the invention [0003] The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/06
Inventor 胥健秋李海仙高新宇贾宁李欣斌刘学孔祥生甄湛鑫孙海波
Owner NORTHEAST LIGHT ALLOY CO LTD
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