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Method for preparing ZL205A alloy containing rare earth elements

A technology of ZL205A and rare earth elements, which is applied in the field of high-strength cast aluminum alloy processing, can solve the problems of difficult control of rare earth element addition components and serious loss of rare earth elements, and achieve the effects of reducing preparation costs, shortening production processes, and simple ingredients

Inactive Publication Date: 2015-04-08
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rare earth elements are added to cast aluminum alloys. On the one hand, rare earths have the effect of "fixing hydrogen" and have a great chemical affinity with hydrogen. They are very easy to interact with hydrogen at high temperatures. On the other hand, rare earths are easily mixed with oxidation. γ-Al 2 o 3 A displacement reaction occurs to form RE 2 o 3 , which makes the rare earth loss very serious, and the addition of rare earth elements is difficult to control

Method used

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  • Method for preparing ZL205A alloy containing rare earth elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Preparation of ZL205A Alloy Containing Ce and La

[0024] 1. Weigh the Al-La master alloy and the Al-Ce master alloy according to the equivalent of 0.05% of the weight of the ZL205A alloy with the addition of Ce and La;

[0025] 2. Heat the ZL205A alloy to 700-720°C, perform refining and degassing treatment for 20 minutes, add Al-La master alloy and Al-Ce master alloy at 720°C, carry out slag breaking and let it stand for 10-15 minutes before completely removing slag;

[0026] 3. Remove the oxide skin on the surface of the alloy liquid, and perform casting. The casting mold is filled at one time, and the temperature of the alloy liquid is 5-10°C higher than the casting temperature.

Embodiment 2

[0027] Example 2 Preparation of ZL205A Alloy Containing Ce and La

[0028] 1. Weigh the Al-La master alloy and the Al-Ce master alloy according to the equivalent of 0.05% of the weight of the ZL205A alloy with the addition of Ce and La;

[0029] 2. After preheating the crucible to a dark red color, add the aluminum ingots, aluminum titanium, aluminum manganese, and aluminum vanadium master alloys that are required to be configured into the crucible in sequence;

[0030] 3. After all the above-mentioned furnace materials are melted, add aluminum-zirconium, aluminum-copper intermediate alloy and metal cadmium at 690-710°C, and after they are melted, stir gently for 3-5 minutes to keep a layer of oxide film on the surface of the alloy liquid;

[0031] 4. When the temperature of the alloy liquid rises to 730-750°C, stir for 3-5 minutes, then raise the temperature of the alloy liquid to 740-760°C, add the aluminum-titanium-boron master alloy, and stir for 8-10 minutes;

[0032] ...

Embodiment 3

[0036] Example 3 Preparation of ZL205A Alloy Containing Ce and La

[0037] 1. Weigh the Al-La master alloy and the Al-Ce master alloy according to the equivalent that the amount of Ce added is 0.02% by weight of the ZL205A alloy and the amount of La added is 0.08% by weight of the ZL205A alloy;

[0038] 2. Heat the ZL205A alloy to 700-720°C, perform refining and degassing treatment for 20 minutes, add Al-La master alloy and Al-Ce master alloy at 720°C, carry out slag breaking and let it stand for 10-15 minutes before completely removing slag;

[0039] 3. Remove the oxide skin on the surface of the alloy liquid, and perform casting. The casting mold is filled at one time, and the temperature of the alloy liquid is 5-10°C higher than the casting temperature.

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Abstract

The invention discloses a method for preparing a ZL205A alloy containing rare earth elements. The method comprises the following steps: heating a ZL205A alloy to the temperature of 700-720 DEG C for melting, adding a rare-earth intermediate alloy, refining by utilizing a rotating degassing refining method, fluxing, standing for 10-15 minutes, removing the slag, performing casting molding after the slag removal operation is ended, and controlling the discharging temperature of the alloy liquid to be 5-10 DEG C higher than a casting temperature, wherein the rare-earth intermediate alloy refers to an alloy of aluminum and rare-earth elements. Compared with the prior art, the method disclosed by the invention has the following beneficial effects that: 1, the rare-earth intermediate alloy is massive and is very stable, so the ingredients are simple, and the alloy is convenient to store; and 2, the production flow of casting a high-strength aluminum alloy can be simplified and shortened, the preparation cost is reduced, and the method is suitable for mass production.

Description

technical field [0001] The invention relates to a method in the technical field of high-strength and toughness cast aluminum alloy processing, in particular to a method for preparing a ZL205A alloy containing rare earth elements. Background technique [0002] In the context of modern high-tech warfare, future advanced aircraft will be faster and fly longer, and the service environment of aircraft structural parts will be even harsher. Not only light weight of component materials is required, but also high comprehensive mechanical properties are required. Cast Al-Cu alloy is a typical high-strength and tough cast aluminum alloy with low density, high specific strength and specific stiffness, good plasticity, excellent electrical and thermal properties, dense oxide film protection on the surface, and good corrosion resistance. Therefore, it has been widely used in aviation, aerospace and other fields. [0003] The ZL205A alloy in the Al-Cu alloy system is a high-purity and hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06
CPCC22C1/03C22C1/026C22C21/00
Inventor 何凯肖旅李宝辉刘颖卓迟秀梅秦守益崔恩强
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST