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Melt purifying agent for vacuum melting of aluminum-magnesium alloy and preparation method thereof

A technology of vacuum smelting and purifying agent, applied in the field of aluminum-magnesium alloy processing, can solve the problems of long time for hydrogen removal, limited industrial application, limited impurity removal ability, etc., so as to improve the use conditions and application scope, and improve the efficiency of hydrogen removal and impurity removal. and effect, the effect of improving efficiency and effect

Inactive Publication Date: 2021-05-11
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, vacuum treatment requires expensive vacuum sealing equipment, the temperature loss of the melt is too large during the hydrogen removal process, and the hydrogen precipitation rate is slow, the formation of bubbles is small, and the floating speed is slow, so the hydrogen removal time is too long and the impurity removal capacity is limited. , equipment requirements are high, limiting industrial applications

Method used

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  • Melt purifying agent for vacuum melting of aluminum-magnesium alloy and preparation method thereof
  • Melt purifying agent for vacuum melting of aluminum-magnesium alloy and preparation method thereof
  • Melt purifying agent for vacuum melting of aluminum-magnesium alloy and preparation method thereof

Examples

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Effect test

Embodiment 1

[0040] In terms of mass percentage, the composition of the purifying agent for the rubidium bromate-containing aluminum matrix composite material is: 98.8% pure aluminum, 1.1% analytically pure rubidium bromate, and 0.1% 2402 phenolic resin binder.

[0041] Weigh 988g of pure aluminum aluminum powder containing 99.99% aluminum and a particle size of 0.1mm, analyze 11g of pure rubidium bromate, analyze 1g of pure phenolic resin particles, put the above weighed pure rubidium bromate into a mortar and crush and stir. After the rubidium bromate in the mortar is in powder form, add phenolic resin powder and stir until it is evenly mixed. Then put the mixed powder in an oven for drying. The drying temperature is 80°C, and the drying time is 30 minutes. After drying, pour the mixed powder into a ball mill, add pure aluminum and aluminum powder, and carry out ball milling and mixing. The ball-to-material ratio of ball milling is 10:1, the ball milling time is 3 hours, and the rotation ...

Embodiment 2

[0043] In terms of mass percentage, the composition of the purifying agent for the rubidium bromate-containing aluminum matrix composite material is: 97.7% pure aluminum, 2.0% rubidium bromate, and 0.3% 2408 phenolic resin binder.

[0044] Weigh 20g of analytically pure rubidium bromate, put it into a mortar, mash it and stir it. After the rubidium bromate in the mortar is powdery, weigh 3g of phenolic resin powder and add it, stir it until it is evenly mixed, and then put the mixed powder Put it in an oven for drying, the drying temperature is 80°C, and the drying time is 30 minutes. After drying, pour the mixed powder into a ball mill, weigh 977g of pure aluminum powder with a particle size of 0.1mm and add it, and perform ball milling and Mixing, the ball-to-material ratio of ball milling is 20:1, the ball milling time is 10h, and the rotation speed is 400r / min. After the mixing is completed, put the mixture into the granulator, set the granulation temperature to 160°C, the...

Embodiment 3

[0046] In terms of mass percentage, the composition of the purifying agent containing rubidium bromate-aluminum matrix composite material is: 96.55% pure aluminum, 2.95% rubidium bromate, 0.5% 2127 phenolic resin binder.

[0047] First, weigh 29.5g analytically pure rubidium bromate and 5g phenolic resin powder, add them into a mortar for grinding and mixing, after the rubidium bromate in the mortar is powdered and mixed evenly with phenolic resin, put the mixed powder into an oven Drying, the drying temperature is 80°C, and the drying time is 30 minutes. After drying, pour the mixed powder into a ball mill, add 965.5g of pure aluminum aluminum powder with a particle size of 0.1mm, and perform ball milling and mixing. The ball material for ball milling Ratio 30:1, ball milling time 20h, rotation speed 500r / min. After the mixing is completed, put the mixture into the granulator, set the granulation temperature to 170°C, the extrusion speed to 1m / min, and the particle size to be...

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Abstract

The invention discloses a melt purifying agent for vacuum melting of a magnesium-aluminum alloy melt and a preparation method thereof. The purifying agent is prepared from the following components in percentage by mass: 1.0-3.0% of rubidium bromide, 0-0.5% of phenolic resin and pure aluminum . The method for preparing the aluminum-based composite material purifying agent comprises the following steps: proportioning, grinding, drying, ball-milling and granulating to prepare particles with the particle size of 1-10mm. The purifying effect of the melt purifying agent combined with a vacuum purifying technology is far better than the effect of singly using the vacuum purifying technology. By using the purifying agent, the melt purifying time can be greatly shortened, the heat loss of the melt is reduced, the sealing requirement of vacuum equipment is lowered, and the application range of the vacuum purifying technology is expanded.

Description

technical field [0001] The invention relates to the purification of aluminum-magnesium alloy melts and belongs to the technical field of aluminum-magnesium alloy processing. Background technique [0002] Aluminum-magnesium series casting alloys are a type of aluminum alloys that are widely used in casting aluminum alloys. Since the addition of magnesium as the main alloying element endows aluminum-magnesium series alloys with good corrosion resistance and excellent air tightness, so aluminum-magnesium series alloys Cast alloys are widely used in various industries. Commonly used aluminum-magnesium alloy grades are 5005, 5050, 5A06, etc. However, aluminum-magnesium alloys are prone to produce pollutants such as gas and oxide inclusions during the casting process, which seriously reduces the purity of the melt, which in turn leads to the appearance of bubbles, pores, looseness, cracks and other defects in the casting, which strongly affects the machinability of the casting. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C21/08C22C21/06B22F9/04
CPCB22F9/04B22F2009/043C22C1/06C22C21/06C22C21/08
Inventor 铁镝但昀付莹张晋王长峰陈继强李军文李冰姜巨福彭琳管仁国
Owner DALIAN JIAOTONG UNIVERSITY
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