Casting method of high-magnesium aluminum alloy

A high-magnesium aluminum alloy and alloy element technology, applied in the field of alloy processing, can solve the problems of reducing the density of materials, reducing the solubility, and deteriorating the mechanical properties of materials, and achieving the effects of improving mechanical properties, reducing precipitation, and reducing shrinkage porosity

Active Publication Date: 2018-12-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The content of magnesium in the commonly used aluminum-magnesium alloys is generally lower than 7wt%. Although the density of aluminum-magnesium alloys is approximately 1/3 of that of steel, there is still a certain gap in strength compared to steel. This is the current aluminum-magnesium alloy. One of the reasons why alloys cannot substantially replace steel
The aluminum-magnesium alloys prepared by the traditional method often have shr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for casting a high-magnesium aluminum alloy, comprising the following steps:

[0026] S1: Preparation of materials, according to the mass percentage of alloy elements in high-magnesium aluminum alloys, Mg: 7%, Mn: 0.8%, Sc: 0.15%, Ti: 0.1%, Be: 0.005%, and the rest are Al and unavoidable impurity elements , the inevitable impurity elements are Fe≤0.1% and Si≤0.05%, respectively weighing industrial pure aluminum, industrial pure magnesium, Al-10Mn master alloy, Al-2Sc master alloy, Al-10Ti master alloy, Al-5Be master alloy Alloy and Al-5Ti-1B grain refiner;

[0027] S2: Melting, drying the industrially pure aluminum ingot weighed in step S1 and adding it to an intermediate frequency induction furnace for melting, the melt temperature is 760°C, after the aluminum ingot is melted, remove slag and add Al-10Mn master alloy, Al-2Sc Master alloy and Al-10Ti master alloy, after the master alloy is completely melted, let stand for 10 minutes;

[0028] S3: Adjust the p...

Embodiment 2

[0034] A high-magnesium aluminum alloy casting method, the present embodiment is carried out according to the method in embodiment 1, the difference is that,

[0035] The melt temperature of the aluminum ingot in step S2 is adjusted to 750°C;

[0036] When adding the refining agent in step S3, the melt temperature is adjusted to 740° C., and the melt is fully contacted and left to stand for 20 minutes;

[0037] After adding magnesium ingots, adjust the melt temperature to 740°C;

[0038] In step S4, 0.1wt% Al-5Ti-1B grain refiner is added and the melt temperature is 720°C;

[0039] In step S5, the rotation speed of the rotary casting machine is 300 rpm, and the gravity coefficient G is 50.

Embodiment 3

[0041] A high-magnesium aluminum alloy casting method, the present embodiment is carried out according to the method in embodiment 1, the difference is that,

[0042] The melt temperature of the aluminum ingot in step S2 is adjusted to 740°C;

[0043] When adding the refining agent in step S3, the temperature of the melt is adjusted to 740° C., and the melt is fully contacted and left to stand for 30 minutes;

[0044] After adding magnesium ingots, adjust the melt temperature to 730°C;

[0045] In step S4, 0.3wt% Al-5Ti-1B grain refiner is added and the melt temperature is 725°C;

[0046] In step S5, the rotation speed of the rotary casting machine is that the gravity coefficient G is 175, the rotation speed is 1350 rpm, and the pouring temperature is 720°C.

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PUM

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Abstract

The invention discloses a casting method of a high-magnesium aluminum alloy, and belongs to the field of alloy preparation. The casting method comprises the following steps that S1, materials are prepared, and an aluminum ingot, a magnesium ingot and other required alloy elements are prepared; S2, the aluminum ingot is smelted, and other required alloy elements are added after the aluminum ingot is molten; S3, a refining agent is added, and after fully stirred, the refining agent stands, and the magnesium ingot is added until the magnesium ingot is completely molten; S4, a grain refining agentis added and slag is removed; and S5, a high-magnesium aluminum alloy cast ingot is prepared by adopting a rotary crystallization method, and when rotary crystallization is carried out, the rotatingspeed is 300-3000 rpm, the gravity coefficient G is 50-300, and the casting temperature is 700-760 DEG C; and the prepared ingot is cooled to the room temperature. The casting method has the advantagethat the high-magnesium aluminum alloy casting mode is provided, and the aluminum alloy with higher casting performance and deformation performance is prepared.

Description

technical field [0001] The invention relates to the field of alloy processing, in particular to a casting method of a high-magnesium aluminum alloy. Background technique [0002] Under the background of the current era, lightweight and high-strength materials have gradually replaced steel materials and become a trend in people's production and life, especially aluminum-magnesium alloys have become a research hotspot due to their low density, high strength, and good corrosion resistance. [0003] The content of magnesium in the commonly used aluminum-magnesium alloys is generally lower than 7wt%. Although the density of aluminum-magnesium alloys is approximately 1 / 3 of that of steel, there is still a certain gap in strength compared to steel. This is the current aluminum-magnesium alloy. One of the reasons why alloys cannot substantially replace steel. The aluminum-magnesium alloys prepared by the traditional method often have shrinkage porosity, which reduces the density of...

Claims

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Application Information

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IPC IPC(8): B22D7/04B22D13/02B22D13/04C22C1/03C22C1/06C22C21/06
CPCB22D7/005B22D7/04B22D13/02B22D13/04C22C1/026C22C1/03C22C1/06C22C21/06
Inventor 李建国毛轶哲
Owner TSINGHUA UNIV
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