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A slurry-type aluminized-silicon protection method for dd6 single crystal superalloy blades

A high-temperature alloy and blade technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of high production cost and limited application scope, and achieve high production efficiency and good oxidation and corrosion resistance. , the effect of the simple method

Active Publication Date: 2015-12-02
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Covering coating and thermal barrier coating are two types of coatings developed in recent years. Anti-oxidation coatings and corrosion-resistant coatings can be prepared by adjusting the composition according to working conditions, but the production cost is high and there are high requirements for equipment. Limited scope of application

Method used

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  • A slurry-type aluminized-silicon protection method for dd6 single crystal superalloy blades
  • A slurry-type aluminized-silicon protection method for dd6 single crystal superalloy blades
  • A slurry-type aluminized-silicon protection method for dd6 single crystal superalloy blades

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A slurry-type aluminized silicon protection method for DD6 single crystal superalloy blades is carried out according to the following steps:

[0028] (1) Slurry configuration

[0029] Mix 20% by mass nickel-aluminum alloy powder and 80% silicon powder, then add ammonium chloride with 5% of the total mass of the above two powders, put the above three powders into a ball mill tank for ball milling and roasting to produce penetrating agent;

[0030] Mix polyvinyl alcohol and water at a volume ratio of 2:9, stir evenly and add ethanol solution to dilute to make a binder;

[0031] The volume of added ethanol solution is 1.5 times of the volume of polyvinyl alcohol and aqueous solution;

[0032] Then mix the penetrating agent, binder and ethanol solution to make a slurry; wherein the volume ratio of the quality of the penetrating agent to the binder and the ethanol solution is 100g: 30ml: 100ml;

[0033] (2) Aluminized silicon

[0034] After cleaning and drying the surfac...

Embodiment 2

[0041] A slurry-type aluminized silicon protection method for DD6 single crystal superalloy blades is carried out according to the following steps:

[0042] (1) Slurry configuration

[0043] Mix 20% by mass nickel-aluminum alloy powder and 80% silicon powder, then add ammonium chloride with 5% of the total mass of the above two powders, put the above three powders into a ball mill tank for ball milling and roasting to produce penetrating agent;

[0044] Mix polyvinyl alcohol and water at a volume ratio of 2:9, stir evenly and add ethanol solution to dilute to make a binder;

[0045] The volume of added ethanol solution is 1.5 times of the volume of polyvinyl alcohol and aqueous solution;

[0046] Then mix the penetrating agent, binder and ethanol solution to make a slurry; wherein the volume ratio of the quality of the penetrating agent to the binder and the ethanol solution is 100g: 30ml: 100ml;

[0047] (2) Aluminized silicon

[0048] After cleaning and drying the surface ...

Embodiment 3

[0053] A slurry-type aluminized silicon protection method for DD6 single crystal superalloy blades is carried out according to the following steps:

[0054] (1) Slurry configuration

[0055] Mix 20% by mass nickel-aluminum alloy powder and 80% silicon powder, then add ammonium chloride with 5% of the total mass of the above two powders, put the above three powders into a ball mill tank for ball milling and roasting to produce penetrating agent;

[0056] Mix polyvinyl alcohol and water at a volume ratio of 2:9, stir evenly and add ethanol solution to dilute to make a binder;

[0057] The volume of added ethanol solution is 1.5 times of the volume of polyvinyl alcohol and aqueous solution;

[0058] Then mix the penetrating agent, binder and ethanol solution to make a slurry; wherein the volume ratio of the quality of the penetrating agent to the binder and the ethanol solution is 100g: 30ml: 100ml;

[0059] (2) Aluminized silicon

[0060] After cleaning and drying the surfac...

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Abstract

The invention discloses a slurry-type aluminized silicon protection method for DD6 single crystal superalloy blades, belonging to the field of heat treatment. Follow the steps below: (1) Slurry configuration: Mix penetrating agent, binder, and ethanol solution to make slurry; (2) Aluminized silicon: Clean and dry the surface of DD6 single crystal superalloy low-pressure turbine blades with acetone After drying, protect the non-permeable surface with high-temperature tape, and then use the spray gun to spray the prepared slurry evenly on the surface of the blade flow channel, dry it in the oven for 2 hours after spraying, and install the blade in the infiltration tank of the aluminized silicon furnace. Keep warm at 700-750°C for 2-3 hours in an argon atmosphere, lift the infiltrated tank out of the furnace, close the argon gas and exhaust valve at the same time, open the infiltrated tank to take out the blades after cooling down to below 80°C, and aluminize After the silicon is completed, the blade is subjected to secondary aging diffusion at 900°C×16h in a vacuum furnace to prepare an aluminized silicon layer that meets the design requirements of 0.02mm~0.04mm. Parts can be partially coated with the present invention; complex multi-component coatings can be prepared in a relatively simple way.

Description

technical field [0001] The invention belongs to the field of heat treatment, and in particular relates to a slurry type aluminized silicon protection method for DD6 single crystal superalloy blades. Background technique [0002] The blade is an important hot-end part of an aero-engine, and its surface has high-temperature oxidation and corrosion under working conditions. In order to prolong the service life of the blade, its surface protection method has always attracted the attention of countries all over the world. DD6 single crystal superalloy is the second generation of single crystal superalloy developed in recent years. Compared with equiaxed or oriented nickel-based superalloys, DD6 single crystal superalloys have a higher working temperature, so they are gradually used in the manufacture of aeroengine turbine blades, which is the development direction of future engines. Increasing the temperature before the engine turbine will make the single The working conditions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/26C23C10/04
Inventor 牛静张尊礼张凡云王蔓施国梅
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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