Manufacturing method of Al-Si-Mn-Zn series aluminum alloy flat cast ingot

A technology of al-si-mn-zn and manufacturing method, which is applied in the field of aluminum alloy flat ingot preparation, can solve problems such as poor fracture toughness and poor stress corrosion resistance, reduce slag content, improve mechanical properties, and improve stress resistance Corrosion and Fracture Toughness Effects

Pending Publication Date: 2022-04-12
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 common problems of poor stress corrosion resistance and poor fracture toughness in traditional Al-Si-Mn-Zn multi-element alloys, and provide a kind of manufacture of Al-Si-Mn-Zn series aluminum alloy flat ingot method

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  • Manufacturing method of Al-Si-Mn-Zn series aluminum alloy flat cast ingot

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Experimental program
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specific Embodiment approach 1

[0015] Specific Embodiment 1: In this embodiment, an Al-Si-Mn-Zn aluminum alloy flat cast ingot contains elements and mass fractions: Si is 2.30% to 2.80%, Fe is 0.10% to 0.25%, and Cu≤0.05 %, Mn is 1.20%-1.40%, Mg≤0.05%, Zn is 1.20%-1.50%, Ti is 0.02%-0.05%, Zr≤0.05%, and the balance is Al.

[0016] In this embodiment, the impurity content in an Al-Si-Mn-Zn aluminum alloy slab ingot is: Cu≤0.05%, Mg≤0.05%, Zr≤0.05%, other individual impurities≤0.05%, and the range of all impurities ≤0.15%, impurities within this range will not have any adverse effects on the casting and metallurgical quality of aluminum alloy flat ingots.

specific Embodiment approach 2

[0017] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the elements and mass fractions contained in the Al-Si-Mn-Zn aluminum alloy slab ingot: Si is 2.55-2.80%, Fe is 0.17- 0.25%, Cu≤0.05%, Mn 1.28-1.40%, Mg≤0.05%, Zn 1.35-1.50%, Ti 0.02-0.04%, Zr≤0.05%, and the balance is Al.

[0018] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Specific embodiment three: the present embodiment a kind of manufacturing method of Al-Si-Mn-Zn series aluminum alloy slab ingot, carry out according to the following steps:

[0020] 1. Weighing: According to mass fraction: Si is 2.30%-2.80%, Fe is 0.10%-0.25%, Cu≤0.05%, Mn is 1.20%-1.40%, Mg≤0.05%, Zn is 1.20%-1.50% , Ti is 0.02% to 0.05%, Zr≤0.05%, and the balance is Al. Weigh aluminum ingot, Al-Si master alloy, Fe agent, Mn agent, Zn ingot and Al-Ti master alloy;

[0021] 2. Melting: Put the aluminum ingots, Al-Si master alloy and Al-Ti master alloy weighed in step 1 into the resistance reverberatory furnace for smelting in sequence. When the melting temperature reaches 700℃~750℃, evenly add Zn ingots. After all the charge is melted, remove the slag. After removing the slag, add Fe agent and Mn agent at 700°C to 750°C, stir the melt until it is evenly mixed, and cover it with flux, and then under the temperature of 700°C to 750°C Half the depth of the sample is take...

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Abstract

The invention discloses a manufacturing method of an Al-Si-Mn-Zn series aluminum alloy flat cast ingot, and relates to the technical field of aluminum alloy flat cast ingot preparation. The invention aims to solve the problems of poor stress corrosion resistance and poor fracture toughness generally existing in the traditional Al-Si-Mn-Zn multi-component alloy. The method comprises the steps that an aluminum ingot, an Al-Si intermediate alloy and an Al-Ti intermediate alloy are sequentially put into a resistance reverberatory furnace to be smelted, a Zn ingot is evenly added, slag is removed after furnace charge is completely smelted, an Fe agent and an Mn agent are added after slag removal, and the melt is stirred to be evenly mixed; the aluminum alloy melt is guided into a standing furnace, Ar gas is introduced into the standing furnace for refining, then standing is conducted, and a casting melt is obtained; and after the casting melt is filtered outside a furnace, casting is conducted through a semi-continuous casting method, and the Al-Si-Mn-Zn series aluminum alloy flat cast ingot is obtained. According to the manufacturing method, the Al-Si-Mn-Zn series aluminum alloy flat cast ingot can be obtained.

Description

technical field [0001] The invention relates to the technical field of preparation of aluminum alloy flat ingots, in particular to a method for manufacturing Al-Si-Mn-Zn series aluminum alloy flat ingots. Background technique [0002] The traditional Al-Si-Mn-Zn multi-alloy has the characteristics of high tensile strength, toughness and fatigue strength, good heat resistance, good processing performance and excellent welding performance, and has very broad application prospects. The casting of the aluminum alloy uses recycled aluminum and low-grade scrap aluminum as raw materials for production, which puts forward higher requirements on the melting process and melt quality. Since the aluminum alloy is a high-silicon alloy, it is the key to internal quality control to ensure that the silicon is fully alloyed and that the structure is compact and free of pores and slag inclusions. However, traditional Al-Si-Mn-Zn multi-component alloys generally have problems such as poor str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22C1/06B22D11/00
Inventor 于鸿硕李欣斌刘义虎甄湛鑫宋阳董保吴龙庆刘有利
Owner NORTHEAST LIGHT ALLOY CO LTD
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