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Method for preparing Yb, La and SiC composite modified A356.2 alloy

A compound modification and alloy technology, applied in the field of alloy smelting, can solve the problems of reducing the effect of ultrasound, too short time, rare earth burning and heat preservation time, etc., and achieve the effect of increasing service life, reducing production cycle and improving pouring quality

Active Publication Date: 2017-09-01
冷金凤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses electromagnetic stirring, but the working temperature of electromagnetic stirring is as high as 840°C, the rare earth is seriously burned and the holding time is too short, the rare earth has a certain incubation period for deterioration, and the time is too short to play the role of rare earth well
CN 104178649 A discloses a method for preparing a high-performance lanthanum-ytterbium aluminum alloy. The alloy casted by this method has not been heat-treated and the ultrasonic time is too short. Immediately after the ultrasonic is completed, it cannot be poured immediately, which reduces the effect of the ultrasonic

Method used

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  • Method for preparing Yb, La and SiC composite modified A356.2 alloy
  • Method for preparing Yb, La and SiC composite modified A356.2 alloy
  • Method for preparing Yb, La and SiC composite modified A356.2 alloy

Examples

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Effect test

Embodiment 1

[0064] A method for preparing Yb, La and SiC compound modified A356.2 alloy, comprising the following steps:

[0065] 1) Pretreatment of silicon carbide:

[0066] (1) Weigh 5.25g of silicon carbide with an average particle size of 5nm-90nm, add 20ML of alcohol, and ultrasonically disperse for 30 minutes;

[0067] (2) Put the silicon carbide that has been ultrasonicated into a blast drying oven, and dry it at 70°C for 2 hours;

[0068] (3) After drying, put it into the grinding bowl and grind for 2 hours;

[0069] (4) SiC is put into a quartz crucible, heated to 300°C for 30 minutes, then heated to 1200°C for 5 hours, stirring every 30 minutes for 40 seconds;

[0070] (5) Remove particles larger than 100nm from SiC after pretreatment;

[0071] 2) Subsequent processing of SiC

[0072] (1) Place the magnetron sputtered glass slide in a beaker filled with acetone, and clean it in an ultrasonic cleaner for 20 minutes; take out the glass slide and clean it in absolute ethanol fo...

Embodiment 2

[0090] A method for preparing Yb, La and SiC compound modified A356.2 alloy, comprising the following steps:

[0091] 1) Pretreatment of silicon carbide:

[0092] (1) Weigh 5.25g of silicon carbide with an average particle size of 5nm-90nm, add 20ML of alcohol, and ultrasonically disperse for 30 minutes;

[0093] (2) Put the silicon carbide that has been ultrasonicated into a blast drying oven, and dry it at 70°C for 2 hours;

[0094] (3) After drying, put it into the grinding bowl and grind for 2 hours;

[0095] (4) SiC is put into a quartz crucible, heated to 295°C for 30 minutes, then heated to 1195°C for 5 hours, and stirred every 30 minutes for 40 seconds;

[0096] (5) Remove particles larger than 100nm from SiC after pretreatment;

[0097] 2) Subsequent processing of SiC

[0098] (1) Place the magnetron sputtered glass slide in a beaker filled with acetone, and clean it in an ultrasonic cleaner for 20 minutes; take out the glass slide and clean it in absolute ethanol...

Embodiment 3

[0116] A method for preparing Yb, La and SiC compound modified A356.2 alloy, comprising the following steps:

[0117] 1) Pretreatment of silicon carbide:

[0118] (1) Weigh 5.25g of silicon carbide with an average particle size of 5nm-90nm, add 20ML of alcohol, and ultrasonically disperse for 30 minutes;

[0119] (2) Put the silicon carbide that has been ultrasonicated into a blast drying oven, and dry it at 70°C for 2 hours;

[0120] (3) After drying, put it into the grinding bowl and grind for 2 hours;

[0121] (4) SiC is put into a quartz crucible, heated to 305°C for 30min, then heated to 1205°C for 5h, stirring every 30min for 40s;

[0122] (5) Remove particles larger than 100nm from SiC after pretreatment;

[0123] 2) Subsequent processing of SiC

[0124] (1) Place the magnetron sputtered glass slide in a beaker filled with acetone, and clean it in an ultrasonic cleaner for 20 minutes; take out the glass slide and clean it in absolute ethanol for 20 minutes; finally,...

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PUM

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Abstract

The invention discloses a method for preparing a Yb, La and SiC composite modified A356.2 alloy. The method comprises the following steps of adopting nanoscale SiC as a particle reinforcement body, carrying out ultra-high temperature oxidation treatment, and coating the surfaces of the SiC particles subjected to oxidation treatment with high-purity metal Ti through a nano magnetron sputtering device; and carrying out high-purity composite heavy rare earth modification and continuous ultrasound-assisted smelting, so as to further improve casting quality. According to the method, an independently developed bracket is adopted as an auxiliary device, so that the SiC particles are casted in a suspension state; and the preparation method is simple in use, relatively low in cost and short in production cycle, and has good industrialization prospects.

Description

technical field [0001] The invention relates to the field of alloy smelting, in particular to a method for preparing a composite modified A356.2 alloy of Yb, La and SiC. Background technique [0002] A356.2 aluminum alloy is a typical Al-Si-Mg ternary alloy. Compared with A356.0 and A356.1, the content of Fe is further reduced, and metal Ti is added to refine the grain better. A356.2 aluminum alloy can cast thin-walled parts with complex shapes. Because of its excellent casting performance and high plasticity, it is used on automobile wheels. [0003] The matrix of the A356.2 alloy without modification agent contains coarse plate-shaped needle-point primary silicon. The coarser the crystal grains, the more uneven the distribution, and the worse the performance of the material. At present, the production industry is committed to improving the performance of the traditional A356.2 alloy. The main method is to improve the coarse particles from the source, make their distribut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/06C22C21/04
CPCC22C1/06C22C1/101C22C1/1036C22C21/04
Inventor 张少辰冷金凤周庆波王鹤王琦
Owner 冷金凤
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