Composite rare earth RE cast aluminum alloy material and preparation method thereof

A technology for casting aluminum alloy and compound rare earth, which is applied in the field of compound rare earth RE casting aluminum alloy material and its preparation, and can solve the problem that the shape and size of eutectic silicon cannot be effectively improved, the content of Sc and Er are low, and the eutectic silicon cannot be formed effectively. and other problems, to achieve the effect of high performance and quality, simplified process, high plastic deformation

Inactive Publication Date: 2020-07-28
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is a problem that the added Sc content and Er content are low. The Er0.05%-0.08% of the foamed aluminum alloy castings, the Sc0.04%-0.06% and the Er0.05%-0.30wt of the aluminum alloy wire %, Sc0.10%~0.20wt%, lower content of Er and Sc has no effect on eutectic silicon, and cannot effectively improve the shape and size of eutectic silicon
In addition,

Method used

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  • Composite rare earth RE cast aluminum alloy material and preparation method thereof
  • Composite rare earth RE cast aluminum alloy material and preparation method thereof
  • Composite rare earth RE cast aluminum alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of composite rare earth RE casting aluminum alloy material, comprising the following steps:

[0054] (1) Heat the Er and Sc alloys to melt, keep them at 741°C for 15 minutes, and remove the slag;

[0055] (2) Add high-silicon cast aluminum alloy, stir for 2 minutes to melt, keep warm at 741°C for 15 minutes, and stir for 2 minutes;

[0056] (3) Add Al-2.01% Sc master alloy, keep warm for 15min, stir for 1min, keep warm for 15min at 741°C, stir for 1min, keep warm for 15min, stir for 1min, remove slag, and heat up to 760°C;

[0057] (4) Add Al-5.82% Er intermediate alloy, stir for 5 minutes, keep warm at 760°C for 20 minutes, stir for 5 minutes, remove slag, continue to keep warm for 20 minutes, cool down to 741°C, keep warm for 10 minutes, cool down to 710°C, nitrogen refining and degassing for 15 minutes, Remove slag, cool down to 705°C, and let stand for 30 minutes;

[0058] (5) Cool down to 600°C with the furnace, keep it warm for 10min, pour i...

Embodiment 2

[0062] A preparation method of composite rare earth RE casting aluminum alloy material, comprising the following steps:

[0063] (1) Heating the Er and Sc alloys to melt, keeping them at 721°C for 30 minutes, and removing the slag;

[0064] (2) Add high-silicon cast aluminum alloy, stir and melt, keep warm at 731°C for 29 minutes, and stir for 2 minutes;

[0065] (3) Add Al-2.01% Sc master alloy, keep warm for 10min, stir for 1min to melt, keep warm for 20min at 731°C, stir for 1min, keep warm for 20min, stir for 1min, remove slag, and heat up to 750°C;

[0066] (4) Add Al-5.82% Er intermediate alloy, stir for 5 minutes, keep warm at 760°C for 20 minutes, stir for 5 minutes, remove slag, continue to keep warm for 15 minutes, cool down to 721°C, keep warm for 10 minutes, nitrogen refining and degassing for 10 minutes, remove slag, and cool down to 705°C, stand still for 35 minutes;

[0067] (5) Cool down to 580°C with the furnace, keep it warm for 5 minutes, pour it into a ca...

Embodiment 3

[0072] A preparation method of composite rare earth RE casting aluminum alloy material, comprising the following steps:

[0073] (1) Heating the Er and Sc alloys to melt, keeping the temperature at 759°C for 10 minutes, and removing the slag;

[0074] (2) Add Si element, stir for 2 minutes to melt, keep warm at 759°C for 10 minutes, and stir for 2 minutes;

[0075] (3) Add Al-2.01% Sc master alloy, heat for 20 minutes, stir for 1 minute to melt, heat at 750°C for 10 minutes, stir for 3 minutes, heat for 20 minutes, stir for 3 minutes, remove slag, and heat up to 790°C;

[0076] (4) Add Al-5.82% Er intermediate alloy, stir for 10 minutes, keep warm at 790°C for 15 minutes, stir for 10 minutes, remove slag, continue to keep warm for 25 minutes, cool down to 745°C, keep warm for 15 minutes, nitrogen refining and degassing for 20 minutes, remove slag, and cool down to 715°C, let stand for 35 minutes;

[0077](5) Cool down to 580°C with the furnace, keep it warm for 15min, pour i...

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PUM

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Abstract

The invention provides a composite rare earth RE cast aluminum alloy material and a preparation method thereof. The alloy is mainly prepared from the following components in percentage by mass: 0.12%-0.85% of Er, 0.18%-0.68% of Sc, 5.8%-7.5% of Si, 0.15%-0.48% of Mg, 0.08%-0.20% of Ti, less than 0.25% of Fe, less than 0.10% of Cu, less than 0.05% of Mn, less than 0.08% of Zn and the balance of Al.Eutectic silicon is refined into 1[mu]m granules, and the structure of the cast aluminum alloy is improved, a Al3.21Si0.47 phase, a Al3Sc phase, a Sc Phase, a ScSi2 phase, an ErSi2 phase and other hard phases are formed, the performance is greatly improved, especially the erbium and scandium elements are dispersed and distributed in the aluminum alloy, so that the aluminum alloy has higher strength, plastic deformation, elastic modulus and wider melting temperature range and has stronger practicability.

Description

technical field [0001] The invention relates to a composite rare earth RE cast aluminum alloy material and a preparation method thereof, belonging to the technical field of metal material preparation. Background technique [0002] At present, the strength of commonly used cast aluminum alloys is insufficient, and it is impossible to further reduce and thin the aluminum alloy parts in terms of weight and thickness. In order to improve the application performance of cast aluminum alloys in aerospace and transportation vehicles, its parts must have high comprehensive mechanical properties under the premise of reducing the overall weight. In this regard, with the goal of light weight, saving consumption, and environmental protection, we are looking for new aluminum alloying elements to improve the comprehensive mechanical properties of aluminum alloys, so that they have great application prospects in aerospace and transportation. [0003] Erbium and scandium are alloying elemen...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03C22F1/043
CPCC22C1/026C22C1/03C22C21/02C22F1/002C22F1/043
Inventor 闫洪杨祖贵李和平包崇军张辉刘云波金自钦孙彦华谭国寅任帅鹏曹瑞珂岳有成李浩王劲榕周悦
Owner KUNMING METALLURGY INST
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