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Aluminium alloy co-dissolved with TiAlN and CaH3 powder and smelting method

A technology of aluminum alloy melt and aluminum alloy, which is applied in the field of rolling high-strength aluminum alloy by casting, can solve the problems of not meeting the requirements of mechanical properties, low hardenability of large ingots, poor tempering resistance, etc. Dispersed and uniform time, high heat treatability, increased effect of heterogeneous nucleation cores

Inactive Publication Date: 2012-05-02
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen that in addition to the poor formability of the current aluminum alloy materials when casting large ingots, the hardenability of large ingots during heat treatment is not high, the tempering resistance is poor, and they cannot meet higher mechanical property requirements. Or some special properties (such as heat resistance, corrosion resistance), etc., are also major defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] One with TiAlN and CaH 3 Powder eutectic aluminum alloy, by mass percentage, including 1.0% Si, 0.5% Fe, 0.15% Cu, 0.4% Mn, 0.1% Cr, 0.5% Mg, 0.25% Zn, 0.6% Ti, 0.6% N, 0.6% Ca, the balance is Al and unavoidable impurities, the content of each impurity is not more than 0.05% of the total mass percentage, and the content of all impurities is not more than 0.15% of the total mass percentage.

[0033] The present invention also provides said TiAlN and CaH 3 Preparation method of powder co-dissolved aluminum alloy, adding TiAlN and CaH in composite treatment 3 , including the following steps:

[0034] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 1.0% Si, 0.5% Fe, 0.15% Cu, 0.4% Mn, 0.1% Cr, and 0.5% Mg in the mass percentage of the total product , 0.25% Zn;

[0035] Step 2: Add aluminum ingots or molten aluminum into the smelting furnace first, heat it to melt it completely, add the materials prepared in Step 1 fir...

Embodiment 2

[0038] One with TiAlN and CaH 3 Powder eutectic aluminum alloy, by mass percentage, including 1.3% Si, 0.4% Fe, 0.28% Cu, 0.7% Mn, 0.08% Cr, 0.8% Mg, 0.2% Zn, 1.1% Ti, 1.1% N, 1.1% Ca, the balance is Al and unavoidable impurities, the content of each impurity is not more than 0.05% of the total mass percentage, and the content of all impurities is not more than 0.15% of the total mass percentage.

[0039] The present invention also provides said TiAlN and CaH 3 Preparation method of powder co-dissolved aluminum alloy, adding TiAlN and CaH in composite treatment 3 , including the following steps:

[0040] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 1.3% Si, 0.4% Fe, 0.28% Cu, 0.7% Mn, 0.08% Cr, and 0.8% Mg in the mass percentage of the total product , 0.2% Zn;

[0041] Step 2: Add aluminum ingots or molten aluminum into the smelting furnace first, heat it to melt it completely, add the materials prepared in Step 1 fir...

Embodiment 3

[0044] One with TiAlN and CaH 3 Powder eutectic aluminum alloy, by mass percentage, including 1.7% Si, 0.3% Fe, 0.4% Cu, 1.0% Mn, 0.06% Cr, 1.2% Mg, 0.18% Zn, 1.5% Ti, 1.5% N, 1.5% Ca, the balance is Al and unavoidable impurities, the content of each impurity is not more than 0.05% of the total mass percentage, and the content of all impurities is not more than 0.15% of the total mass percentage.

[0045] The present invention also provides said TiAlN and CaH 3 Preparation method of powder co-dissolved aluminum alloy, adding TiAlN and CaH in composite treatment 3 , including the following steps:

[0046] Step 1: Prepare materials according to the components of the high-strength aluminum alloy, including 1.0-1.7% of Si in the mass percentage of the total product, less than or equal to 0.5% of Fe, 0.15-0.4% of Cu, 0.4-1.0% of Mn, less than Equal to 0.1% Cr, 0.5-1.2% Mg, less than or equal to 0.25% Zn;

[0047] Step 2: Add aluminum ingots or molten aluminum into the smelting ...

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Abstract

The invention relates to an aluminium alloy co-dissolved with TiAlN and CaH3 powder and a smelting method. The aluminium alloy and the smelting method have the following beneficial effects: 0.6-1.5% of powdery TiAlN and 0.6-1.5% of powdery CaH3 are added to the wrought aluminium alloy, have specific surface areas much bigger than the specific surface areas of the common massive substances in the process of being added to the aluminium alloy melt in a fluidized form along with the protective gas and can realize rapid dispersion and fully contact with the smelt, thus obviously shortening the dispersion and homogenization time; meanwhile, by adopting the high strength aluminium alloy, the nuclei of heterogeneous nucleation can be effectively added in the alloy solidification process in the casting process, thus achieving the effect of grain refinement and improving the alloy strength; the added elements can promote formation of interstitial atoms and interstitial phases and have high solubility in alpha (Al) solid solution at high temperature and low solubility at room temperature, thus ensuring the alloy to have higher heat-treatable property; and after heat treatment, the hardness and strength of the alloy are improved to a great extent.

Description

technical field [0001] The invention relates to a high-strength aluminum alloy by casting instead of rolling, and also relates to its melting method. Background technique [0002] Aluminum alloys for deep processing often need to be first cast into large ingots, such as flat ingots, round bars, etc., and then processed into various finished products by means of rolling, extrusion, forging, etc. These processes are basically related to heat treatment. Combined, if the final product can be used directly, it will also go through operations such as segmentation, surface processing, and passivation treatment. These processing methods require that the aluminum alloy material itself has good deep processing performance, including casting performance, pressure processing deformation performance, heat treatment strengthening performance, corrosion resistance performance, fatigue damage resistance performance, surface processing and coating performance, etc. Among them, the melting a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02C22C1/06
Inventor 张中可车云门三泉
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES