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Cast method of ZL101 and ZL116 aluminium alloy investment castings

A technology of ZL116, aluminum alloy castings, applied in the field of aluminum alloy castings, can solve the problems of reduced welding performance, unassisted aluminum alloy welding performance, low welding success rate, etc., to reduce gas solubility, improve welding performance, and gas partial pressure small effect

Active Publication Date: 2011-04-13
SHAANXI HONGYUAN AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In engineering, it is often encountered that aluminum alloy castings and other metals are welded, but in the case of normal melting, some gas will infiltrate into the castings. Due to the high gas content in aluminum alloy castings, during the welding process , a large number of pores will be generated on one side of the aluminum alloy casting, resulting in a low welding success rate and a greatly reduced welding performance
[0003] In modern metallurgical smelting technology, the usual method to reduce the air content in molten metal is to fill the furnace with protective gas such as argon, but this measure still does not help to improve the welding performance of aluminum alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The material used is ZL116 aluminum alloy, and the steps to be taken are as follows:

[0029] (1) Shell pre-baking: heat the shell to 980±10°C, keep it warm for 2 hours, cool and wash with water;

[0030] (2) Shell roasting: heat the aluminum shell to 650±10°C, keep it warm for 1.5 hours and then cool it to 200°C with the furnace;

[0031] (3) Vacuuming: continuous vacuuming of the melting furnace, the vacuum degree of the melting furnace is kept at 20Pa ~ 1000Pa until the casting is released;

[0032] (4) Heating and melting: when the melting furnace is evacuated to 20Pa-1000Pa, it starts to melt with electricity;

[0033] (5) Pouring: The aluminum alloy metal liquid starts pouring when the temperature in the furnace reaches 670±10°C;

[0034] (6) Out of the furnace: After pouring, the vacuum is broken and out of the furnace, and the furnace is cooled by air outside the furnace.

[0035] Clean up the parts after they come out of the furnace, including sand blowing, ...

Embodiment 2

[0037] The material used is ZL101 aluminum alloy, and the steps to be taken are as follows:

[0038] (1) Shell pre-baking: heat the shell to 980±10°C, keep it warm for 3 hours, cool, and wash with water;

[0039] (2) Shell roasting: heat the shell to 650±10°C, keep it warm for 2.5 hours and then cool it to 430°C with the furnace;

[0040] (3) Vacuuming: continuous vacuuming of the melting furnace, the vacuum degree of the melting furnace is kept at 20Pa ~ 1000Pa until the casting is released;

[0041] (4) Heating and melting the aluminum alloy blank: when the melting furnace is evacuated to 20Pa ~ 1000Pa, it starts to melt with electricity;

[0042] (5) Pouring: The aluminum alloy metal liquid starts to pour the shell when the temperature in the furnace reaches 670±10°C;

[0043] (6) Out of the furnace: After pouring, the vacuum is broken and out of the furnace, and the furnace is cooled by air outside the furnace.

[0044] Clean up the parts after they come out of the furn...

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PUM

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Abstract

The invention relates to a cast method of ZL101 and ZL116 aluminium alloy investment castings, comprising the following steps: pre-roasting a molding shell; roasting the molding shell; vacuumizing; heating and melting aluminium alloy blank; pouring; discharging; and carrying out heat treatment. In the invention, the problem of high air content in an aluminium alloy casting with the methods of vacuum melting and vacuum pouring is solved, thus the ZL101 and ZL116 castings and deformed aluminium alloy parts can be favourably welded so as to satisfy casting welding performance requirements and improve casting welding qualification rate.

Description

technical field [0001] The invention relates to a method for casting aluminum alloy castings, in particular to a method for casting ZL101 and ZL116 aluminum alloy investment castings. Background technique [0002] In engineering, it is often encountered that aluminum alloy castings and other metals are welded, but in the case of normal melting, some gas will infiltrate into the castings. Due to the high gas content in aluminum alloy castings, during the welding process , A large number of pores will be generated on one side of the aluminum alloy casting, resulting in a low welding success rate and greatly reduced welding performance. [0003] In modern metallurgical smelting technology, the usual method to reduce the air content in molten metal is to fill the furnace with protective gas such as argon, but this measure still does not help to improve the welding performance of aluminum alloys. Contents of the invention [0004] Aiming at the disadvantage that the smelted al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D21/04C22C1/00C22C21/00
Inventor 高映民刘俊英
Owner SHAANXI HONGYUAN AVIATION FORGING
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