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Multi-element eutectic Al-Si alloy material and preparation method thereof

An alloy material, al-si technology, applied in the field of alloys, can solve the problems of limited application scope, reduced high temperature performance, reduced room temperature performance, etc., to achieve the effect of short solution and aging treatment time, and low comprehensive production cost

Inactive Publication Date: 2019-02-19
广东省海洋工程装备技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual production, the improvement of high temperature performance of eutectic Al-Si alloy is usually accompanied by a significant decrease in room temperature performance; conversely, improving its room temperature performance will reduce high temperature performance
Due to the inability to maintain good performance at high temperature and room temperature, the application range of this alloy is greatly limited

Method used

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  • Multi-element eutectic Al-Si alloy material and preparation method thereof
  • Multi-element eutectic Al-Si alloy material and preparation method thereof
  • Multi-element eutectic Al-Si alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]A. Ingredients: Industrial pure aluminum is weighed according to the mass percentage of each element in the multi-component eutectic Al-Si alloy material: Al: 79.5%, Si: 13.0%, Cu: 4.5%, Mg: 1.0%, Ni: 2.0%. (99.99%), Al-20% Si master alloy (the mass of silicon accounts for 20% of the total mass of the master alloy), Al-50% Cu master alloy (the mass of copper accounts for 50% of the total mass of the master alloy), industrial pure magnesium (99.99%) and Al-10% Ni master alloy (the quality of nickel accounts for 10% of the total mass of the master alloy) for batching.

[0040] B. Melting: B1: Put industrial pure aluminum and Al-20% Si master alloy as the base material into the graphite clay crucible which has been preheated to 280°C, then put it into a well-type melting furnace and heat it to 770°C and keep it at a constant temperature. When the base material is softened and slumped, its surface is sprinkled with an amount of 0.6% covering agent (by 15wt% to 25wt% of CaO, ...

Embodiment 2

[0053] In this implementation, the T6 state multi-element eutectic Al-Si alloy material is prepared according to the method basically the same as that of Example 1, the only difference is:

[0054] In step A, industrial pure aluminum, Al-20% Si master alloy, Al -50% Cu master alloy, industrial pure magnesium and Al-10% Ni master alloy for batching;

[0055] The smelting temperature in steps B1, B2, B3 is respectively 780 ℃, 715 ℃ and 770 ℃, and the consumption of covering agent is respectively 0.5%, 0.6% and 0.6% of batching gross weight; In step B3, C 2 Cl 6 The dosage is 0.5% of the total weight of the ingredients. In step D, the alloy ingot is heated to 510°C.

[0056] The composition of the multi-element eutectic Al-Si alloy ingot obtained in step C was detected by an inductively coupled plasma atomic emission spectrometer, and the detection results are shown in Table 2. It can be seen from Table 2 that the smelting process adopted in this embodiment can produce alloy i...

Embodiment 3

[0061] In this implementation, the T6 state multi-element eutectic Al-Si alloy material is prepared according to the method basically the same as that of Example 1, the only difference is:

[0062] Step A weighs industrial pure aluminum, Al-20% Si master alloy, Al- 50% Cu master alloy, industrial pure magnesium and Al-10% Ni master alloy for batching;

[0063] The smelting temperatures in steps B1, B2, and B2 are respectively 790°C, 725°C, and 790°C, and the consumption of the covering agent is respectively 0.7%, 0.7%, and 0.5% of the total weight of the ingredients; in step B3, C 2 Cl 6 The dosage is 0.7% of the total weight of the ingredients. In step D, the alloy ingot is heated to 520°C.

[0064] The composition of the multi-element eutectic Al-Si alloy ingot obtained in step C was detected by an inductively coupled plasma atomic emission spectrometer, and the detection results are shown in Table 3. It can be seen from Table 3 that the smelting process adopted in this e...

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Abstract

The invention relates to the technical field of alloy, in particular to a multi-element eutectic Al-Si alloy material and a preparation method thereof. The alloy comprises, by mass, 12.35%-13.65% of Si, 4.28%-4.73% of Cu, 0.95%-1.05% of Mg, 1.90%-2.10% of Ni and the balance aluminum and unavoidable impurities, and the total amount of impurities is less than or equal to 0.1%. according to the preparation method, the multi-element eutectic Al-Si alloy material with high tensile strength at high temperature (300 DEG C) and room temperature can be obtained through targeted alloy composition designand an appropriate heat treatment system. Moreover, due to the short time of solid solution and aging treatment in the heat treatment process, the comprehensive production cost is low.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a multi-component eutectic Al-Si alloy material, a preparation method thereof and a piston made of the alloy. Background technique [0002] Cast eutectic Al-Si alloys are widely used in the piston industry due to their good casting performance, thermal stability, wear resistance, low thermal expansion coefficient, low density and high specific strength. Adding Mg, Cu, Ni and other metal elements to the eutectic Al-Si alloy can form a variety of strengthening phases such as M, θ, ε, δ, γ and Q, which can enhance the mechanical properties of the alloy. In particular, high temperature strengthening phases such as ε, δ, and γ formed by adding appropriate amounts of Cu and Ni elements can effectively improve the high temperature performance of the alloy. However, in actual production, the improvement of high temperature performance of eutectic Al-Si alloy is usually accompanied by a s...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03C22C1/06C22F1/043
CPCC22C21/02C22C1/026C22C1/03C22C1/06C22F1/002C22F1/043
Inventor 张理郭震蒋晓明赵龙海吴志华阮一扬盘翠林
Owner 广东省海洋工程装备技术研究所
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