Method for manufacturing large-size heat-treatment aluminum alloy slab ingot capable of being strengthened

A manufacturing method and aluminum alloy technology, which is applied in the field of manufacturing aluminum alloy flat ingots, can solve the problems of low casting yield and inability to roll out wide and thick plates with excellent performance, so as to reduce casting stress, reduce cooling intensity, and improve grain quality. The effect of granularity

Active Publication Date: 2015-11-04
NORTHEAST LIGHT ALLOY CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of low casting yield and inability to roll wide and thick plates with good performance in aluminum alloy flat ingots prepared in the prior art, and provides a method for manufacturing aluminum alloy flat ingots that can be strengthened by large-scale heat treatment

Method used

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  • Method for manufacturing large-size heat-treatment aluminum alloy slab ingot capable of being strengthened
  • Method for manufacturing large-size heat-treatment aluminum alloy slab ingot capable of being strengthened
  • Method for manufacturing large-size heat-treatment aluminum alloy slab ingot capable of being strengthened

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specific Embodiment approach 1

[0024] Specific implementation mode 1: This implementation mode is a method for manufacturing a large-scale heat-treated aluminum alloy slab that can be strengthened, which is completed according to the following steps:

[0025] 1. Weighing materials: Si: 0.5%~0.7%, Cu: 0.15%~0.25%, Mg: 0.9%~1.1%, Cr: 0.1%~0.25%, and the balance Al according to the mass percentage of each element, weighed respectively Pure aluminum ingots, Al-Si master alloys, Al-Cu master alloys, Cr additives and pure Mg ingots;

[0026] 2. Smelting: Add the pure aluminum ingot, Al-Si master alloy, Al-Cu master alloy, Cr additive and pure Mg ingot weighed in step 1 into the natural gas furnace in sequence, and then heat the furnace at a temperature of 720°C to 760°C Melting until the pure aluminum ingot, Al-Si master alloy, Al-Cu master alloy, Cr additive and pure Mg ingot are all melted, and then under the conditions of temperature 720℃~760℃ and stirring speed 1m / s~1.5m / s Stir and smelt for 5 minutes to 10 ...

specific Embodiment approach 2

[0041]Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass fraction of Al in the pure aluminum ingot described in step 1 is greater than 99.98%. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0042] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the mass fraction of Al in the Al-Si master alloy described in step 1 is 80%, and the mass fraction of Si is 20%. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method for manufacturing a large-size heat-treatment aluminum alloy slab ingot capable of being strengthened, and relates to a method for manufacturing the aluminum alloy slab ingot. The method for manufacturing the large-size heat-treatment aluminum alloy slab ingot capable of being strengthened mainly solves the problems that as for an aluminum alloy slab ingot prepared in the prior art, the casting yield is low, and wide and thick slabs with excellent properties cannot be rolled out. The method comprises the first step of material weighing, the second step of smelting, the third step of casting melt preparation and the forth step of molding, and the large-size heat-treatment aluminum alloy slab ingot capable of being strengthened is obtained. By means of the method, according to the prepared large-size heat-treatment aluminum alloy slab ingot capable of being strengthened, the yield strength ranges from 98 N/mm<2> to 120 N/mm<2>, the tensile strength ranges from 182 N/mm<2> to 201 N/mm<2>, and the elongation percentage in a casting state ranges from 9.56% to 14.7%. By means of the method, the large-size heat-treatment aluminum alloy slab ingot capable of being strengthened can be obtained.

Description

technical field [0001] The invention relates to a method for manufacturing an aluminum alloy flat cast ingot. Background technique [0002] With the overall speed-up of my country's railway passenger and freight transportation, the horsepower requirements for diesel locomotives are increasing. As the engine power increases, the volume and weight of the car body increase significantly. However, the current roadbed conditions in my country are difficult to bear the weight of high-power high-speed locomotives. Due to the advantages of low density and high specific strength, aluminum alloy has continuously expanded its application range and can replace steel materials in many occasions. Replacing the original steel structure of the truck compartment with aluminum alloy has a beautiful appearance and can significantly reduce the weight of the compartment itself. Therefore, the use of aluminum alloy materials to replace the steel structural parts of high-power locomotives is the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03
Inventor 刘义虎吴晓旭武子原滕志贵黄岩超曹俊波陈雷田野
Owner NORTHEAST LIGHT ALLOY CO LTD
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