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A kind of casting aluminum alloy and preparation method thereof

A technology for casting aluminum alloys and aluminum alloys, applied in the field of casting aluminum alloys and their preparation, can solve the problems of unfavorable centralized melting cost control, high yield ratio of materials, insufficient tensile strength and the like

Active Publication Date: 2020-10-23
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses phosphorus, strontium and rare earth elements for modification treatment, in which the phosphorus element is mainly used to refine the primary silicon, and the strontium element is used to refine the eutectic silicon. When the two elements appear in the alloy melt at the same time At the same time, phosphorus and strontium will form compounds locally in the melt, which will reduce the refining effect of strontium to a certain extent. Although the interaction between phosphorus and strontium can be reduced or eliminated by increasing the addition of strontium, this It is not conducive to the cost control of centralized smelting and batch pouring process
In addition, the tensile strength of the material disclosed in this patent is 450 MPa, which does not involve the impact toughness value of the material. The yield ratio of the alloy material is about 0.856. If it is used to prepare chain link components that withstand dynamic impact, the tensile strength is insufficient, and the material Due to the problems of high yield ratio and high tendency of material brittleness, it is difficult to ensure the stability requirements of complex and multiple loads of chain link components under actual working conditions

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  • A kind of casting aluminum alloy and preparation method thereof

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Embodiment 1

[0023] A cast aluminum alloy consisting of the following components: Si: 7.5%, Cu: 2.7%, Dy: 0.45%, P: 0.02%, Sc: 0.15%, Ti: 0.15%, Mg: 0.4%, Fe: 0.1% , Mn: 0.06%, Zn: 0.03%, Ni: 0.02%, and the balance is Al, and the stated percentages are percentages by weight.

[0024] The preparation method of cast aluminum alloy in the present embodiment is as follows:

[0025] Step 1: Perform dry blasting treatment on 99.98wt% high-purity aluminum ingots, aluminum 10 titanium master alloy, aluminum 30 silicon master alloy, and 99.8wt% pure magnesium ingots, and preheat them to 300°C respectively. (The appropriate ratio is calculated according to the proportion of cast aluminum alloy in this embodiment) All the prepared high-purity aluminum ingots, aluminum 30 silicon master alloy, aluminum 10 titanium master alloy are added to the silicon carbide crucible 3 in the resistance melting furnace 12 The temperature is raised in the middle, through the air inlet 1 (the crucible cover 2 is arran...

Embodiment 2

[0035] A cast aluminum alloy consisting of the following components: Si: 8.5%, Cu: 2.5%, Dy: 0.45%, P: 0.04%, Sc: 0.2%, Ti: 0.19%, Mg: 0.8%, Fe: 0.2% , Mn: 0.1%, Zn: 0.1%, Ni: 0.1%, and the balance is Al, and the stated percentages are percentages by weight.

[0036] The preparation method of cast aluminum alloy in the present embodiment is as follows:

[0037] Step 1: Perform dry blasting treatment on 99.98wt% high-purity aluminum ingots, aluminum 10 titanium master alloy, aluminum 30 silicon master alloy, and 99.8wt% pure magnesium ingots, and preheat them to 340°C respectively. (The appropriate ratio is calculated according to the proportion of cast aluminum alloy in this embodiment) All the prepared high-purity aluminum ingots, aluminum-30-silicon master alloy, and aluminum-10-titanium master alloy are added to the silicon carbide crucible in the resistance melting furnace Raise the temperature, and pass into the crucible through the air inlet (the upper part of the melti...

Embodiment 3

[0047] A cast aluminum alloy consisting of the following components: Si: 7.8%, Cu: 2.6%, Dy: 0.42%, P: 0.035%, Sc: 0.1%, Ti: 0.17%, Mg: 0.65%, Fe: 0.11% , Mn: 0.08%, Zn: 0.06%, Ni: 0.04%, and the balance is Al, and the stated percentages are percentages by weight.

[0048] The preparation method of cast aluminum alloy in the present embodiment is as follows:

[0049] Step 1: Perform dry blasting treatment on 99.98wt% high-purity aluminum ingot, aluminum 10 titanium master alloy, aluminum 30 silicon master alloy and 99.8wt% pure magnesium ingot respectively, and preheat them to 320°C respectively, (The appropriate ratio is calculated according to the proportion of cast aluminum alloy in this embodiment) All the prepared high-purity aluminum ingots, aluminum-30-silicon master alloy, and aluminum-10-titanium master alloy are added to the silicon carbide crucible in the resistance melting furnace Raise the temperature, and pass into the crucible through the air inlet (the upper p...

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Abstract

The invention provides a cast aluminum alloy and a preparation method of the cast aluminum alloy. The cast aluminum alloy comprises, by weight, 7.5-8.5% of Si, 2.5-2.7% of Cu, 0.35-0.45% of Dy, 0.02-0.04% of P, 0.1-0.2% of Sc, 0.15-0.19% of Ti, 0.4-0.8% of Mg, not larger than 0.2% of Fe, not larger than 0.1% of Mn, not larger than 0.1% of Zn, not larger than 0.1% of Ni and the balance Al. The preparation method comprises the steps of melting raw materials in a dry argon environment, conducting spinning spraying degassing treatment on the melt, conducting pouring, conducting solid solution andaging treatment and the like. The cast aluminum alloy prepared by the adoption of the preparation method is high in yield strength, high in percentage elongation after fracture and good in impact toughness.

Description

technical field [0001] The invention relates to a casting aluminum alloy and a preparation method thereof. Background technique [0002] With the continuous improvement of the lightweight and structural stability requirements of high-speed mechanical transmission devices, the chain link components that undertake high-speed transportation and impact loads in high-speed mechanical transmission devices, due to their large number and high-precision dynamic motion coordination in the transmission device Requirements and other conditions are facing the challenge of reducing its own weight and improving plastic deformation resistance. At present, through the material substitution and structural optimization design of steel chain links by using cast aluminum alloys, the lightweight requirements have been basically realized, but conventional cast aluminum alloys are difficult to adapt to chain link components due to their low yield strength and elongation after fracture. Changes in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/03C22F1/043
CPCC22C1/026C22C1/03C22C21/02C22F1/043
Inventor 陈强万元元赵高瞻陶健全邢志辉胡传凯李明黄志伟柴舒心王艳彬吴帅
Owner NO 59 RES INST OF CHINA ORDNANCE IND