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A kind of master alloy for regenerated aluminum and iron-rich phase modification and preparation method thereof

A technology for master alloys and secondary aluminum, applied in the field of new materials and metallurgy, can solve the problems of unsuitable smelting of aluminum and its alloys, increase iron, increase costs, etc. The effect of mechanical properties

Active Publication Date: 2019-04-16
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There is an important problem in the production process of waste aluminum recycling: almost every recycling process of waste aluminum needs to be remelted, and the remelting process will cause different degrees of iron increase. Accumulation in waste aluminum, so in the recycling process of waste aluminum, it will continue to accumulate and reach a very high content
The melting temperature of aluminum alloy should not exceed 750°C. If the temperature is too high, it will cause excessive burning loss, increase the cost, and at the same time produce oxidation, which will reduce the quality. The solubility of gas in the air in aluminum water will increase. Air bubbles cause waste
The melting point of these intermediate alloys is as high as 1000 ° C, which is not suitable for the melting of aluminum and its alloys.

Method used

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  • A kind of master alloy for regenerated aluminum and iron-rich phase modification and preparation method thereof
  • A kind of master alloy for regenerated aluminum and iron-rich phase modification and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 99g Al-Mn master alloy, 1g WO 3 ; Take CaF with a mass ratio of 1:35:35:1 2 , NaCl, KCl, Na 3 AlF 6 A total of 10g was mixed to form a flux, and mixed with WO 3 Mix to form a mixed powder; ball mill the mixed powder under vacuum protection, the ball milling speed is 350rpm, the ball-to-material ratio is 10:1, and the ball milling time is 8h; the ball-milled mixed powder is preheated to 400°C for 30min, and the Al-10Mn intermediate The alloy is heated to 800°C in a resistance furnace to melt, and the preheated mixed powder is wrapped with aluminum foil and pressed into the melt, and treated by acoustic-magnetic coupling for 10 minutes; the ultrasonic power is 1KW, and the frequency is 10KHz; Put it in place for 5 minutes to remove the slag and take it out of the furnace for casting.

Embodiment 2

[0033] Weigh 90g Al-Mn master alloy, 10g WO 3 ; Take by weighing CaF with a mass ratio of 10:45:45:10 2 , NaCl, KCl, Na 3 AlF 6 A total of 20g was mixed to form a flux, and mixed with WO 3 Mix to form a mixed powder; ball mill the mixed powder under vacuum protection, the ball milling speed is 350rpm, the ball to material ratio is 10:1, and the ball milling time is 8h; the mixed powder after ball milling is preheated to 500°C for 120min, and the Al-10Mn intermediate The alloy is heated to 800°C in a resistance furnace to melt, and the preheated mixed powder is wrapped with aluminum foil and pressed into the melt, and treated by acoustic-magnetic coupling for 10 minutes; the ultrasonic power is 1KW, and the frequency is 10KHz; Set it for 10 minutes to remove the slag and take it out of the furnace for casting.

Embodiment 3

[0035] Weigh 95g Al-Mn master alloy, 5g WO 3 ; Take by weighing CaF with a mass ratio of 3:38:38:3 2 , NaCl, KCl, Na 3 AlF 6 A total of 15g was mixed to form a flux and mixed with WO 3Mix to form a mixed powder; ball mill the above mixed powder under vacuum protection, the ball milling speed is 350rpm, the ball to material ratio is 10:1, and the ball milling time is 8h; the mixed powder after ball milling is preheated to 450°C for 90min, and the Al-10Mn The master alloy is melted by heating to 800°C in a resistance furnace, and the preheated mixed powder is wrapped with aluminum foil and pressed into the melt, and treated by acoustic-magnetic coupling for 10 minutes; the ultrasonic power is 1KW, and the frequency is 10KHz; after the treatment is completed Stand still for 15 minutes, remove the slag and take it out of the furnace for casting.

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Abstract

The invention discloses intermediate alloy for modifying a secondary aluminum iron-rich phase and a preparation method of the intermediate alloy, and belongs to the technical field of new materials and metallurgy. According to the technical scheme, composition of the aluminum-manganese-tungsten intermediate alloy is AlMn10Wx (x=1-5); WO3 and a flux consisting of CaF2, NaCl, KCl and Na3AlF6 are mixed, subjected to ball milling and preheated; preheated mixed powder is wrapped by aluminum foil and pressed into the molten aluminum-manganese intermediate alloy, and acousto-magnetic coupling treatment is performed for 5-20 min; a product is left to stand for 5-15 min after treatment, and slag is pushed off a furnace for casting. The yield of the aluminum-manganese-tungsten intermediate alloy prepared with the technical scheme is high; with adoption of the prepared intermediate alloy for modifying the secondary aluminum iron-rich phase, addition of manganese can be reduced, harm of the iron-rich phase can be further reduced, the modification effect of the iron-rich phase in the secondary aluminum alloy is reinforced, and mechanical properties of the aluminum alloy are improved.

Description

technical field [0001] The invention belongs to the technical field of new materials and metallurgy, and in particular relates to an intermediate alloy used for secondary aluminum-rich-iron phase modification and a preparation method thereof. Background technique [0002] There is an important problem in the production process of waste aluminum recycling: almost every recycling process of waste aluminum needs to be remelted, and the remelting process will cause different degrees of iron increase. Therefore, in the process of recycling waste aluminum, it will continue to accumulate and reach a very high content. [0003] The solid solubility of iron in aluminum is very low, and the iron-rich phase is more likely to be in the form of needle-like β (Al 5 FeSi) appears in the aluminum alloy structure. This phase is coarse and flaky in three dimensions, which is both hard and brittle. It forms a source of stress concentration, severely splits the aluminum matrix, and reduces the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/03
CPCC22C1/03C22C21/00
Inventor 白培康张文达冯英豪任霁萍刘斌
Owner ZHONGBEI UNIV
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