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Aluminium alloy model fine crystal aluminium ingot for wheel hub and its manufacturing method

A technology for aluminum alloys and aluminum ingots, which is applied in the field of aluminum alloys for wheel hubs and its manufacturing, can solve the problems of increased cost of addition, and achieve the effects of sufficient metamorphism, fine grains, and low production costs

Inactive Publication Date: 2005-11-09
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this alloy is that the titanium element is added through the master alloy, which increases the cost of addition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A fine-grained aluminum ingot with a mass fraction of Ti of 0.15% is selected as a raw material to prepare the aluminum alloy of the present invention. The mass fraction of Ti in the target product is 0.10%, and the mass fraction of Sr is 0.03%.

[0050] According to the ratio of 6.8% mass fraction of Si in the target product, pure silicon is placed in a melting furnace, preheated to 500°C, and then the fine-grained aluminum ingot melt directly out of the electrolytic cell is added, and pure aluminum of the required quality is added (such as Al 99.70A), so that the mass fraction of molten Ti is 0.10%;

[0051] Use the second injection of refining agent, the temperature drops to 740 ° C, the first injection for 15 minutes, the injection gas is nitrogen, and the refining agent used is the refining agent for aluminum alloy purchased from the solvent factory;

[0052] Add pure Mg so that the mass fraction of Mg is 0.35%;

[0053] Analyze the melt composition, if the mass f...

Embodiment 2

[0059] A fine-grained aluminum ingot with a mass fraction of Ti of 0.18% is selected as a raw material to prepare the aluminum alloy of the present invention. The mass fraction of Ti in the target product is 0.15%, the mass fraction of Sr is 0.02%, and the mass fraction of cerium-rich mixed rare earth is 0.3%. .

[0060] According to the ratio of 6.0% mass fraction of Si in the target product, pure Si is placed in a smelting furnace, preheated to 600°C, and then the fine-grained aluminum ingot melt directly out of the electrolytic cell is added, and pure aluminum of the required quality is added (such as Al 99.70A), so that the mass fraction of molten Ti is 0.15%;

[0061] Add pure Mg so that the mass fraction of Mg is 0.45%;

[0062] Add cerium-rich mixed rare earths, so that the mass fraction of rare earth elements is 0.3%;

[0063] Analyze the melt composition, if the mass fraction of Ti is lower than 0.14%, add AlTi5 master alloy grain refiner to supplement, if it is hig...

Embodiment 3

[0069] A fine-grained aluminum ingot with a mass fraction of Ti of 0.20% is selected as a raw material to prepare the aluminum alloy of the present invention. The mass fraction of Ti in the target product is 0.18%, and the mass fraction of cerium-rich mixed rare earths is 0.5%.

[0070] According to the ratio of 7.8% mass fraction of Si in the target product, pure silicon is placed in a melting furnace, preheated to 700°C, and then the fine-grained aluminum ingot melt directly out of the electrolytic cell is added, and pure aluminum of the required quality is added (such as Al 99.70A), so that the mass fraction of molten Ti is 0.18%;

[0071] Add cerium-enriched mixed rare earths so that the mass fraction of rare earth elements is 0.48%;

[0072] Add pure Mg so that the mass fraction of Mg is 0.30%;

[0073] Analyze the melt composition, if the mass fraction of Ti is lower than 0.17%, add titanium agent to supplement, if it is higher than 0.19%, add pure aluminum to dilute; ...

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Abstract

An Al-alloy for wheel hub contains proportionally Si, Mg, Ti, RE, B, Sr and Al. It is made up of fine-crystal aluminium ingot through smelting, adding Si, Mg, Ti, RE, B and Sr, etc.

Description

technical field [0001] The invention belongs to the technical field of production of nonferrous metals and their alloys, and in particular relates to an aluminum alloy for wheel hubs made of fine-grained aluminum ingots and a manufacturing method thereof. Background technique [0002] Al-Si alloys are widely used in industry due to their good mechanical properties and excellent casting properties. Because the silicon phase is brittle and exists in the form of coarse flakes, it severely splits the alloy matrix and causes stress concentration at the tip and corners of the silicon phase, thereby reducing the mechanical properties of the alloy, especially the plasticity and cutting performance, and its fatigue life is severely reduced. Therefore, when the amount of Si in the Al-Si alloy exceeds 6%, it must be modified. Modification treatment makes the eutectic Si change from coarse flakes to fine fibrous or lamellar ones, thereby improving the properties of the alloy. Refineme...

Claims

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Application Information

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IPC IPC(8): C22C21/02
Inventor 左秀荣仲志国宋天福王明星翁永刚刘忠侠杨昇
Owner ZHENGZHOU UNIV
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