A composite modificator for regeneration of adc12 aluminum alloy and preparation method thereof

A composite modifier and ADC12 technology, applied in the field of metal materials, can solve the problems of easy recession, poor mechanical properties of ADC12 aluminum alloy, and unstable refining effect of modifier, and achieve the effect of eliminating gas, improving mechanical properties and casting performance.

Active Publication Date: 2021-03-26
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the published patent No. CN103643088A, the title is "A Modifier for ADC12 Aluminum Alloy and Its Modification Method". The modificator containing Al-5Ti-B and Al-10RE is added to the ADC12 alloy to solve the problem of the existing ADC12 aluminum alloy. The refinement effect of the modified agent is unstable, easy to decline, and the mechanical properties of ADC12 aluminum alloy are poor

Method used

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  • A composite modificator for regeneration of adc12 aluminum alloy and preparation method thereof
  • A composite modificator for regeneration of adc12 aluminum alloy and preparation method thereof
  • A composite modificator for regeneration of adc12 aluminum alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] After melting the pure aluminum in the corundum crucible, add Al-Te master alloy and YbCl at 730°C 3 After 5 minutes of insulation, the amount of Te added was 12% of the total weight of the modificator, and YbCl 3 0.5%; Stir with a graphite rod for 3 minutes, when the furnace temperature drops to 700°C, pour argon into the melt for refining, keep warm for 10 minutes; remove surface scum, pour the molten metal into a metal mold to solidify.

Embodiment 2

[0020] After melting the pure aluminum in the corundum crucible, add Al-Te master alloy and YbCl at a temperature of 735°C 3 After 5 minutes of insulation, the amount of Te added was 14% of the total weight of the modificator, and YbCl 3 2%; Stir with a graphite rod for 3 minutes, when the furnace temperature drops to 705°C, pour argon into the melt for refining, keep warm for 10 minutes; remove surface scum, pour the molten metal into a metal mold to solidify.

Embodiment 3

[0022] After melting the pure aluminum in the corundum crucible, add Al-Te master alloy and YbCl at a temperature of 740°C 3 After the insulation for 5 minutes, the amount of Te added was 16% of the total weight of the modificator, and YbCl 3 Stir with a graphite rod for 3 minutes. When the furnace temperature drops to 710°C, pour argon into the melt for refining and keep it warm for 10 minutes. Remove surface scum and pour the molten metal into a metal mold to solidify.

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Abstract

The invention discloses a composite modificator for regenerating an ADC12 aluminum alloy and a preparing method. The modificator comprises, by mass percent, 10%-20% of Te, 0.1%-10% of YbCl3 and the balance Al. After pure aluminum in a corundum crucible is melted and an Al-Te intermediate alloy and YbCl3 are added at the temperature ranging from 730 DEG C to 750 DEG C, heat preservation is conducted for 5-8 min, stirring is conducted for 3 min, and when the furnace temperature is reduced to 700-720 DEG C, argon inflation is conducted for refining, and heat preservation is conducted for 5-20 min; and surface dross is removed, and metal liquid is poured into a metal die to be solidified. The modificator can well avoid the action of alloy splitting due to mass thick needle-like iron-rich phases in the regenerated ADC12 aluminum alloy, the mechanical performance and machining performance of the regenerated ADC12 aluminum alloy are improved, gas in melt can be eliminated, generation of casting air holes is obviously reduced, and accordingly the product quality of castings is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to a compound modifier for modification treatment of smelted alloys and a preparation method thereof. Background technique [0002] The recycled ADC12 aluminum alloy has excellent casting performance, no thermal cracking and loose tendency, and high air tightness. Widely used in automotive gearboxes, engine housings, air valves, etc. However, because the silicon phase in the regenerated ADC12 aluminum alloy is in the form of coarse needles and blocks, the alloy still has low strength and poor plasticity (the elongation at room temperature is only 1~2%), and the machinability is also in general. . Recycled ADC12 aluminum alloy is basically added with recycled waste aluminum, so the alloy is inevitably doped with more impurities, among which iron element is the most harmful. The iron phase in the alloy mainly includes α-Fe phase and β-Fe phase. The α-Fe phase is bone-like, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C1/03C22C21/00
CPCC22C1/026C22C1/03C22C1/06C22C21/00
Inventor 胡志何仁华解协威罗超闫洪
Owner NANCHANG UNIV
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