Method for synthesizing magnesium-silicon intermediate and preparation of high-magnesium aluminum alloy thereby

A technology of high-magnesium aluminum alloy and synthesis method, which is applied in the field of synthesis of magnesium-silicon intermediates from natural perlite ore as a silicon source, and in-situ synthesis of high-magnesium aluminum alloys, which can solve the high cost of silicon sources and the probability of Si formation Small, single species of Mg2 and other problems, to achieve the effect of abundant reserves and low cost

Active Publication Date: 2008-05-14
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to solve the high cost of silicon source, single variety and Mg in the aluminum alloy manufacturing process that needs to add magnesium and silicon elements 2 Si generation probability is small and other industrial problems

Method used

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  • Method for synthesizing magnesium-silicon intermediate and preparation of high-magnesium aluminum alloy thereby
  • Method for synthesizing magnesium-silicon intermediate and preparation of high-magnesium aluminum alloy thereby

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Experimental program
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Embodiment 1

[0029] Using commercially available magnesium metal with a purity of 99.5% and expanded perlite with a purity of 99% as raw materials, the composition analysis results obtained by measuring the expanded perlite as stable oxides are: SiO 2 72.5wt%, Al 2 o 3 13.5wt%, K 2 O is 4.25wt%, Na 2 O is 3.75wt%, CaO is 0.1wt%, Fe 2 o 30.9wt%, MgO is 0.075wt%, H or O and other analytical non-displays are 4.925wt%, and the sum of the composition of various component analytes constitutes 100%; with commercially available KCl of 99.5% purity as the reaction medium; Add 370g metal magnesium nugget in the crucible 8 of accompanying drawing 2 of the present invention, pour into the liquid state KCl of the equal weight of the magnesium nugget to the magnesium nugget surface then, start supersonic frequency induction heater 10 and start heating among the accompanying drawing 2 of the present invention, observe After KCl begins to melt again in the reaction system, add 43g expanded perlite im...

Embodiment 2

[0031] All the other are with embodiment 1. The difference is: ① Add 20g of metal magnesium block to the crucible 8; ② The amount of expanded perlite added is 4.3g; ③ The reaction temperature is controlled at 785°C; ④ The stirring frequency is 2 times per minute; ⑤ The Si content of the intermediate 1.51wt%, Al 0.02wt%, Fe content range 0.09wt%, other impurity elements 0.05wt%. ⑥The as-cast density of the intermediate is 1.737g / cm 3 ; As-cast Vickers hardness is 52.96HV.

Embodiment 3

[0033] All the other are with embodiment 1. The difference is: ① Add 37g metal magnesium block to the crucible 8; ② The amount of expanded perlite is 2.6g; ③ The reaction temperature is controlled at 800°C; ④ The stirring frequency is 6 times per minute; ⑤ The Si content of the intermediate The range is 1.78wt%, the Al is 0.05wt%, the Fe content is 0.01wt%, and other impurity elements are 0.11wt%. ⑥The as-cast density of the intermediate is 1.76g / cm 3 ; As-cast Vickers hardness is 53.52HV.

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Abstract

The invention relates to a synthesis method of magnesium-silicon intermediate and a method of preparing high magnesium aluminum alloy by using the intermediate, and particularly relates to a method of using natural perlite ore as silica source for synthesizing Mg-Si intermediate, and a method of using the intermediate to prepare the high magnesium aluminum alloy by means of in-situ synthesis. The Mg-Si intermediate is a special Mg-Si intermediate alloy containing low silicon, the special Mg-Si intermediate alloy and the in-situ synthesis method can solve the industrial difficult problems of high cost of silicon source, single variety and small generation possibility of Mg2Si, etc., in the process of making aluminum alloy with magnesium and silicon elements added synchronously.

Description

Technical field: [0001] The present invention relates to a synthesis method of a magnesium-silicon intermediate and a method for preparing a high-magnesium aluminum alloy using the intermediate, in particular to a method for synthesizing a magnesium-silicon intermediate using natural perlite ore as a silicon source, and using the intermediate body, and a method for preparing high-magnesium aluminum alloys by means of in-situ synthesis. Background technique: [0002] Many grades of aluminum alloys need to add magnesium and silicon elements at the same time to form alloy strengthening phases, such as American grades of 5182, 5083, 5454, 5052 and other grades of aluminum alloys. This type of Al-Mg-Si alloy is used in national defense and civilian applications. There are wide applications. Many of the aluminum alloy armor materials used for tank light armor, ship armor, etc. are improved on the basis of high-magnesium aluminum alloy formulas such as 5083 or 5182, or directly us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C21/08B22D21/04
Inventor 吴耀明王立民董龙祥谢军伟王小林王立东
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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