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Aluminizing process method for inner cavity and outer surface of cobalt-base alloy blade

A technology of cobalt-based alloy and process method, which is applied in the field of heat treatment, can solve the problems of shallow penetration layer and uncontrollable gas method, etc., and achieve the effect of improving anti-oxidation, wide application value and remarkable effect

Active Publication Date: 2016-02-03
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gas method is consistent with the chemical vapor deposition method in principle, but the gas method is uncontrollable and the depth of the infiltrated layer is shallow

Method used

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  • Aluminizing process method for inner cavity and outer surface of cobalt-base alloy blade
  • Aluminizing process method for inner cavity and outer surface of cobalt-base alloy blade
  • Aluminizing process method for inner cavity and outer surface of cobalt-base alloy blade

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Effect test

Embodiment 1

[0030] In this embodiment, in order to improve the anti-oxidation and anti-corrosion properties of the blade surface, the process of aluminizing the inner cavity and outer surface of the cobalt-based alloy blade is carried out according to the following steps:

[0031] 1. Preparation of aluminum particles

[0032] Appropriate amount of aluminum particles is spread in the reactor (generating reactor outside the reaction chamber and generating reactor inside the reaction chamber).

[0033] 2. Parts preparation

[0034] (1) Use a liquid sand blasting machine to perform water blasting treatment on the parts to be deposited on the coating to remove the surface oxide layer;

[0035] (2) Put the parts in a water-based detergent solution with a mass fraction of 8%, use an ultrasonic cleaner to ultrasonically clean them for 25 minutes, rinse them with clean water, dehydrate them with absolute ethanol, and dry them with a hair dryer;

[0036] (3) Install the parts on the fixture, and ...

Embodiment 2

[0043] In this embodiment, in order to improve the anti-oxidation and anti-corrosion properties of the blade surface, the process of aluminizing the inner cavity and outer surface of the cobalt-based alloy blade is carried out according to the following steps:

[0044] 1. Preparation of aluminum particles

[0045] Appropriate amount of aluminum particles is spread in the reactor (generating reactor outside the reaction chamber and generating reactor inside the reaction chamber).

[0046] 2. Parts preparation

[0047] (1) Use a liquid sand blasting machine to perform water blasting treatment on the parts to be deposited on the coating to remove the surface oxide layer;

[0048] (2) Put the parts in a water-based cleaning agent solution with a mass fraction of 5%, use an ultrasonic cleaner to ultrasonically clean them for 20 minutes, rinse them with clean water, dehydrate them with absolute ethanol, and dry them with a hair dryer;

[0049] (3) Install the parts on the fixture....

Embodiment 3

[0056] In this embodiment, in order to improve the anti-oxidation and anti-corrosion properties of the blade surface, the process of aluminizing the inner cavity and outer surface of the cobalt-based alloy blade is carried out according to the following steps:

[0057] 1. Preparation of aluminum particles

[0058] Appropriate amount of aluminum particles is spread in the reactor (generating reactor outside the reaction chamber and generating reactor inside the reaction chamber).

[0059] 2. Parts preparation

[0060] (1) Use a liquid sand blasting machine to perform water blasting treatment on the parts to be deposited on the coating to remove the surface oxide layer;

[0061] (2) Put the parts in a water-based cleaning agent solution with a mass fraction of 10%, use an ultrasonic cleaner to ultrasonically clean them for 30 minutes, rinse them with clean water, dehydrate them with absolute ethanol, and dry them with a hair dryer;

[0062] (3) Install the parts on the fixture...

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Abstract

The invention belongs to the field of heat treatment and particularly relates to an aluminizing process method for an inner cavity and the outer surface of a cobalt-base alloy blade. The high-pressure engine turbine guide blade is manufactured from DZ40M cobalt-base casting alloy and is the important heat end component of an aero-engine. Under the harsh working environment, in order to improve the oxidation resistance and corrosion resistance of the inner surface and the outer surface of the blade, the high-temperature protection technology is adopted for the surface of an outer runner of the high-conductivity blade, in other words, aluminized layers are prepared on the inner cavity of and the surface of the outer runner of the high-conductivity blade at the same time, so that the reliability of the blade is improved, and the service life of the blade is prolonged. By means of the method, the design manufacturing requirement of the high-pressure engine turbine guide blade can be met, the depth of the aluminized layer of the surface of the outer runner of the high-conductivity blade ranges from 0.02 mm to 0.055 mm, and the depth of the aluminized layer of the inner cavity ranges from 0.01 mm to 0.035 mm; the effect that the surface of the blade is protected through chemical vapor deposition aluminizing is remarkable; and compared with a substrate, the oxidation resistance of the blade is improved by two times, corrosion resistance can be improved by two times, and the service life of the blade is prolonged.

Description

technical field [0001] The invention belongs to the field of heat treatment, in particular to a process method for aluminizing the inner cavity and the outer surface of a cobalt-based alloy blade. Background technique [0002] Engine high-pressure turbine guide vanes are important hot-end components of aero-engines. Under working conditions, high-temperature oxidation and corrosion phenomena exist on the surface of the guide vanes, especially the internal cavity corrosion and oxidation of the blades, which have become a technical problem in engine design. In order to improve the reliability of the blade and prolong the service life of the blade, the surface of the inner and outer flow channels of the high guide vane adopts high temperature protection technology at the same time, that is, an aluminized layer with a depth of 0.02mm to 0.055mm is prepared on the surface of the outer flow channel of the high guide vane, and the inner cavity is prepared 0.01mm~0.035mm aluminized ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/12C23C16/02C22C19/07
Inventor 牛静张尊礼陈仲强刘艳张平
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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