5xxx series aluminum alloy melt purifying agent and preparation method thereof

A purifying agent, aluminum alloy technology, applied in the field of aluminum alloy processing, can solve the problems of damage to melt cleanliness, large solubility gap, narrow application range, etc., to achieve the effect of improving efficiency and effect, convenient storage, and increasing operation difficulty

Inactive Publication Date: 2021-06-22
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The harm of hydrogen inclusion in 5-series aluminum alloys is the greatest. Although the solubility of hydrogen in aluminum alloys is relatively low, the gap between the solubility of hydrogen in the melt and in the solid phase is too large (the solubility of hydrogen in the aluminum alloy melt is 1.91 times in solid phase)
However, the existing melt purifiers have the following common disadvantages: narrow application range and single function
In practical applications, most of the fluxes need to be used together to achieve the purpose of purification, and due to the addition of too many types of fluxes, other impurities are introduced into the melt, which damages the cleanliness of the melt

Method used

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  • 5xxx series aluminum alloy melt purifying agent and preparation method thereof
  • 5xxx series aluminum alloy melt purifying agent and preparation method thereof
  • 5xxx series aluminum alloy melt purifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In terms of mass percentage, the composition of the cesium iodate-containing aluminum-based composite cleaning agent is: 5.1% of analytically pure cesium iodate and 94.9% of pure aluminum.

[0040] Weigh 949g of pure aluminum ingot, analyze 51g of pure cesium iodate, put it into an oven for drying, the drying temperature is 80°C, and the drying time is 30 minutes, and the above-mentioned weighed cesium iodate is ground into a particle size smaller than 100μm uniform powder and wrap it with aluminum foil. After adding pure aluminum aluminum ingots into the graphite crucible, put the crucible into a heating furnace and heat it to 690°C. The heating time is 2 hours, and then keep it warm for 20 minutes. Wrap it with aluminum foil paper with pliers. Cesium iodate is clamped into the melt, stirred for 1 minute and then kept warm for 5 minutes, slag-casting, the casting temperature is 680°C, the size of the cast cylindrical ingot is φ60mm×height 100mm, and then the extrusion m...

Embodiment 2

[0042] In terms of mass percentage, the composition of the cesium iodate-containing aluminum-based composite purifying agent is: 6.3% of analytically pure cesium iodate and 93.7% of pure aluminum.

[0043] Weigh 63g of analytically pure cesium iodate, put it into a mortar and grind it to a powder with a particle size of less than 100μm, wrap it with aluminum foil, roll it into a ball, weigh 937g of pure aluminum ingot, mix the pure aluminum ingot with aluminum foil The cesium iodate powder wrapped in paper is dried in an oven at a drying temperature of 80°C for 30 minutes. After drying, put the above-mentioned weighed pure aluminum ingot into a graphite crucible and put the crucible into In the heating furnace, the heating time is 2h, the heating temperature is 700°C, heat it to 700°C and keep it warm for 15 minutes, then clamp the cesium iodate wrapped in aluminum foil into the melt with pliers, stir it for 30 seconds, keep it warm for 6 minutes, remove the slag and cast , th...

Embodiment 3

[0045] In terms of mass percentage, the composition of the cesium iodate-containing aluminum-based composite cleaning agent is: 8.5% of analytically pure cesium iodate and 91.5% of pure aluminum.

[0046] Weigh 915g of pure aluminum ingot, put it into an oven for drying, the drying temperature is 90°C, and the drying time is 30 minutes. After drying to remove moisture, put it into a graphite crucible, and put the graphite crucible into a heating furnace for heating. The heating time is 2h, heat at 740°C for 10 minutes, weigh 85g of cesium iodate, grind it into powder with a mortar, the particle size is less than 100μm, then wrap it with aluminum foil to form a ball, and then put it in an oven for drying at a temperature of 90 ℃, drying for 30 minutes, then slowly clamp it into the molten pure aluminum with pliers, stir for 1 minute, then hold the temperature for 8 minutes and then cast the slag. The casting temperature is 700 ℃, and the size of the cast cylindrical ingot is φ6...

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Abstract

The invention discloses a melt purifying agent suitable for 5xxx series aluminum alloy smelting and a preparation method of the melt purifying agent. The purifying agent is a linear melt purifying agent prepared from caesium iodate with the mass fraction of 5.0-10.0% and pure aluminum. The method for preparing the aluminum-based composite material purifying agent comprises the steps of material preparation, grinding, drying, smelting, casting and extrusion. The melt purifying agent has multiple functions of covering isolation, hydrogen removal, slag removal, grain refinement and the like, and the comprehensive performance of the melt purifying agent is superior to that of a traditional melt purifying agent. According to the purifying agent, stable and fine bubbles are generated in a melt through the physical and chemical action between cesium iodate and the melt, gas and inclusions in the melt are rapidly adsorbed, and the bubbles float to the surface of the melt to be discharged. Inclusions play a role in covering and isolating on the surface of the melt, the air suction phenomenon of the melt is prevented, and the effects of hydrogen removal, impurity removal and covering and isolating are achieved. The purifying agent is easy to use, wide in application range, high in hydrogen removal and impurity removal efficiency and good in casting quality, and can be widely applied to smelting and purifying procedures of various 5xxx alloys.

Description

technical field [0001] The invention relates to the purification of 5xxx series aluminum alloy melts and belongs to the technical field of aluminum alloy processing. Background technique [0002] 5xxx series aluminum alloys are aluminum alloys with magnesium as the main additive element, so they are also called magnesium aluminum alloys. They have excellent corrosion resistance, excellent air tightness, high specific strength, low density, recyclability, good thermal conductivity, and Electromagnetic radiation, thin-wall forming and many other advantages are widely used in various industries. At present, the commonly used 5-series aluminum alloy grades in the industry are 5005, 5050, 5A06, 5652, etc. However, 5-series aluminum alloys are prone to defects in the manufacturing process, especially in the casting process, which are prone to defects such as bubbles, pores, inclusions, looseness, and cracks, which seriously affect the quality of the product. Therefore, the 5 seri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/06
CPCC22C1/026C22C1/06
Inventor 铁镝但昀付莹赵占勇王志卢小鹏余江伟张博彧李冰管仁国
Owner DALIAN JIAOTONG UNIVERSITY
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