Process method capable of improving mechanical property of aluminum alloy

A process method and technology of aluminum alloy, applied in the aviation field, can solve the problems of mechanical properties not meeting the requirements of product specifications, and achieve the effect of eliminating pinholes and shrinkage defects and improving mechanical properties.

Inactive Publication Date: 2019-08-06
鹰普航空科技有限公司
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AI Technical Summary

Problems solved by technology

Heat treatment according to the T6 process, the mechanical properties obtained do not meet the product specification requirements, the tensile data of the body test bar is shown in Table 3

Method used

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  • Process method capable of improving mechanical property of aluminum alloy
  • Process method capable of improving mechanical property of aluminum alloy
  • Process method capable of improving mechanical property of aluminum alloy

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific examples.

[0028] A process method for improving the mechanical properties of aluminum alloy, characterized in that it comprises the following steps:

[0029] (1) Melting: After heating the A356 aluminum alloy ingot to 730-750°C to melt, add a modifier to treat the alloy melt;

[0030] (2) Casting: degassing and refining the A356 aluminum alloy melt obtained in step (1), leaving it still, removing slag, and then casting to obtain the product;

[0031] (3) Hot isostatic pressing: The product obtained in step (2) is subjected to hot isostatic pressing; the hot isostatic pressing (HIP) process is a process of applying high air pressure to a heated casting in a specially constructed pressure vessel, It eliminates porosity inside the casting and increases elongation. In the hot isostatic pressing process, after the pinhole defects are eliminated, the unit load area of ​​the material increas...

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Abstract

The invention provides a process method capable of improving the mechanical property of aluminum alloy. The process method capable of improving the mechanical property of the aluminum alloy comprisesthe following steps: (1) smelting: heating an A356 aluminum alloy ingot to 730 to 750 DEG C to melt, and adding a modifier to treat an alloy melt; (2) casting: performing gas-removing refining, standing and drossing treatment on the A356 aluminum alloy melt obtained in the step (1), and then casting to product a product; (3) performing hot isostatic pressing: performing hot isostatic pressing on the product obtained in the step (2); (4) performing solid solution treatment: performing solid solution treatment on the product obtained in the step (3); (5) performing aging treatment: performing aging treatment on the product obtained in the step (4); (6) air-cooling: air-cooling the product aged in the step (5) after discharging; and (7) detecting: detecting the mechanical property of the product obtained in the step (6). After the modifier is added, the spheroidizing speed of silicon during aluminum alloy heat treatment can be increased, the coarsening speed of the silicon during heat treatment can be reduced, and the yield strength and the extending rate of the aluminum silicon alloy can be significantly improved.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to a process method for improving the mechanical properties of aluminum alloys. Background technique [0002] A356 aluminum alloy has good mechanical properties, casting properties and cutting properties, and is widely used in aviation, aerospace and automobile industries to manufacture bearing parts with complex shapes. Take the 2793842 product as an example. The material of this product is A356 aluminum alloy, which is made of low-pressure investment casting process. It is a part of the fuel pump of Boeing 747 aeroengine. The mechanical performance requirements are shown in Table 1. [0003] [0004] Table 1 [0005] In order to obtain a product with qualified mechanical properties, an aluminum-titanium-boron (AITi5B1) master alloy of 0.1% by weight of the aluminum alloy is added to the aluminum alloy liquid. The chemical composition of aluminum titanium boron (AITi5B1) ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/043C22C1/06C22C21/02
CPCC22C1/06C22C21/02C22F1/002C22F1/043
Inventor 朱瑞于洋安庆贺史兴利
Owner 鹰普航空科技有限公司
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