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Super large specification aluminum alloy slab ingot and casting method

A super-sized, aluminum alloy technology, applied in the field of aluminum alloy casting, can solve the problems of aluminum alloy flat ingots prone to coarse grain structure, small size of flat ingots, easy cracking of flat ingots, etc., and achieve uniform microstructure refinement and reduction Effect of ingot cold shutting and improving the appearance of slab

Active Publication Date: 2015-01-14
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems that the existing 5083 aluminum alloy has low mechanical properties, the casted slabs have small specifications, cannot meet the needs of the market, and the aluminum alloy slabs are prone to coarse grain structure, slabs are easy to crack and surface pull marks. , providing a 650×2750mm ultra-large aluminum alloy flat ingot cast by using 5083 aluminum alloy and its casting method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The mass percentage of the alloy composition of the super-large aluminum alloy flat ingot is as follows

[0045] Si : 0.00~0.40 Fe : 0.00~0.40 Cu : 0.00~0.10

[0046] Mn : 0.40~0.70 Mg : 4.00~4.50 Cr : 0.05~0.25

[0047] Zn : 0.00~0.25 Ti : 0.00~0.15 The balance is Al

[0048] Aluminum alloy flat ingot casting method:

[0049] (1) Ingredients: Calculate the amount of remelted aluminum ingots with a purity of 99.7% and 5083 aluminum alloy return material according to the alloy composition, and then mix the ingredients. The percentage of 5083 aluminum alloy return material to the total input amount is 0.1~30%. Calculate The weighed AlMn75 master alloy and AlCr75 master alloy are ready for use.

[0050] (2) Melting: According to the calculated results of the ingredients, start feeding, first put in remelted aluminum ingots and 5083 aluminum alloy return materials, and then put in AlMn75 master alloy and AlCr75 master alloy. Heat in the smelting furnace until the furnac...

Embodiment 2

[0058] Different from the aluminum alloy flat ingot alloy composition mass percentage in example 1, as follows

[0059] Si : 0.00~0.40 Fe : 0.00~0.40 Cu : 0.00~0.10

[0060] Mn : 0.70~1.00 Mg : 4.50~4.90 Cr : 0.05~0.25

[0061] Zn : 0.00~0.25 Ti : 0.00~0.15 The balance is Al

[0062] Aluminum alloy flat ingot casting method:

[0063] (1) Ingredients: Calculate the amount of remelted aluminum ingots with a purity of 99.7% and 5083 aluminum alloy return material according to the alloy composition, and then mix the ingredients. The percentage of 5083 aluminum alloy return material to the total input amount is 30 ~ 60%. Calculate The weighed AlMn75 master alloy and AlCr75 master alloy are ready for use.

[0064] (2) Melting: According to the calculated results of the ingredients, start feeding, first put in remelted aluminum ingots and 5083 aluminum alloy return materials, and then put in AlMn75 master alloy and AlCr75 master alloy. Heat in the smelting furnace until the furna...

Embodiment 3

[0072] Different from the aluminum alloy flat ingot alloy composition mass percentage in example 1, as follows

[0073] Si : 0.10~0.40 Fe : 0.10~0.40 Cu : 0.10~0.10

[0074] Mn : 0.10~0.40 Mg : 4.20~4.70 Cr : 0.05~0.15

[0075] Zn : 0.10~0.25 Ti : 0.10~0.15 The balance is Al

[0076] Aluminum alloy flat ingot casting method:

[0077] (1) Ingredients: Calculate the amount of remelted aluminum ingots with a purity of 99.7% and 5083 aluminum alloy return material according to the alloy composition, and then mix the ingredients. The percentage of 5083 aluminum alloy return material to the total input amount is 25 ~ 45%. Calculate The weighed AlMn75 master alloy and AlCr75 master alloy are ready for use.

[0078] (2) Melting: According to the calculated results of the ingredients, start feeding, first put in remelted aluminum ingots and 5083 aluminum alloy return materials, and then put in AlMn75 master alloy and AlCr75 master alloy. Heat in the smelting furnace until the charg...

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Abstract

The invention discloses a super large specification aluminum alloy slab ingot and a casting method. The method comprises the following steps: preparing raw materials according to ratio, then adding in a melting furnace for melting and removing the slag; conversing to a heat preserving furnace for on-line degassing and refining, degassing, removing the slag and purifying, adding an aluminum titanium boron grain-refining agent for refining the crystal grains; then casting to the aluminum alloy slab ingot; and finally homogenizing to obtain the aluminum alloy slab ingot with difficult cracking and refined tissue. The produced 650*2750mm slab ingot is capable of eliminating the segregation and casting stress of the slab ingot, and guaranteeing the product quality, the mechanical properties can satisfy the requirements of the large-scale structural members.

Description

technical field [0001] The invention relates to the field of aluminum alloy casting, in particular to an ultra-large aluminum alloy flat ingot and a casting method thereof. Background technique [0002] 5083 belongs to the Al-Mg-Si series alloy, which has a wide range of applications, especially the construction industry is inseparable from this alloy, and is the most promising alloy. It has good corrosion resistance, excellent weldability, good cold workability, and medium strength. The main alloying element in 5083 alloy is Mg. Mg can improve the fluidity, improve the processing performance, increase the strength and yield limit, and improve the machinability of the alloy, but when the amount added is large, the casting performance is poor, the strength and plasticity at high temperature are low, the shrinkage is large during cooling, and it is easy to It will lead to thermal cracking and porosity, reduce the elongation and increase the viscosity of the alloy, so the con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/03C22C1/06B22D1/00B22D7/00
Inventor 沈海鸥胡传彬姚祥胡少莉蓝东华贺应钦黄金宁樊春阳雷志峰
Owner 广西南南铝加工有限公司
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