Chemical milling technology for surface plasticity deformation layer of single crystal cast blade

A single crystal blade and blade technology, which is applied in the field of layered milling of plastic deformation on the surface of single crystal casting blades, to prevent recrystallization, improve reliability, and have no defects.

Inactive Publication Date: 2012-12-12
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are no patents and literature on this aspect

Method used

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  • Chemical milling technology for surface plasticity deformation layer of single crystal cast blade
  • Chemical milling technology for surface plasticity deformation layer of single crystal cast blade
  • Chemical milling technology for surface plasticity deformation layer of single crystal cast blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Surface treatment of blades: washing with water to remove excess on the blade surface;

[0029] (2) Heat the wax composed of paraffin wax, yellow wax and rosin to 70°C. After the wax is completely melted, use absorbent cotton dipped in wax to seal the small holes of the leaves, then apply wax to the parts of the leaves that need to be protected, and finally remove the excess wax;

[0030] (3) Carry out chemical milling treatment on blades: use chemical milling liquid to carry out chemical milling treatment on blades. The area of ​​the blade is 0.2dm 2 / l, each component in the chemical milling liquid of unit volume is made up of: 150ml / l nitric acid, 80ml / l hydrochloric acid, 80ml / l hydrofluoric acid, 150g / l ferric chloride, 40ml / l acetic acid, 0.3g / l ten Dialkyl sodium sulfate, 15g / l activated carbon, when the blade area treated by unit volume chemical milling fluid is 2dm 2 / l, replace the chemical milling fluid;

[0031] (4) After the chemical milling treatme...

Embodiment 2

[0038] (1) Surface treatment of the leaves: use acetone to remove stains on the surface of the leaves;

[0039] (2) First use plastic bags to seal the small holes in the leaves, use absorbent cotton dipped in paint to seal the larger holes in the leaves, then paint the parts of the leaves that need to be protected, and then paint the second time after drying at room temperature , and finally remove excess paint, the paint used is AC-850 paint;

[0040] (3) Carry out chemical milling treatment on the blade: use chemical milling liquid to carry out chemical milling treatment on the blade, the chemical milling temperature is 35°C, the chemical milling speed is 3.0 μm / min, the chemical milling depth is 50 μm, and each unit volume of chemical milling fluid treatment The area of ​​the blade is 0.2dm 2 / l, each component in the chemical milling liquid of unit volume is made up of: 200ml / l nitric acid, 100ml / l hydrochloric acid, 100ml / l hydrofluoric acid, 180g / l ferric chloride, 40ml...

Embodiment 3

[0046] (1) Surface treatment of blades: washing with water to remove excess on the blade surface;

[0047] (2) First use adhesive tape to seal the small holes in the blade, use absorbent cotton dipped in paint to seal the larger holes in the blade, then paint the part of the blade that needs to be protected, and then paint the second time after drying at room temperature. Finally remove excess paint, the paint used is AC-850 paint;

[0048] (3) Carry out chemical milling treatment on blades: use chemical milling liquid to carry out chemical milling treatment on blades. The area of ​​the blade is 0.2dm 2 / l, each component in the chemical milling fluid per unit volume consists of: 200ml / l nitric acid, 100ml / l hydrochloric acid, 100ml / l hydrofluoric acid, 200g / l ferric chloride, 50ml / l acetic acid, 0.6g / l deca Dialkyl sodium sulfate, 20g / l activated carbon, when the area of ​​blades treated by unit volume chemical milling fluid is 2.5dm 2 / l, replace the chemical milling fluid;...

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Abstract

The invention relates to the field of surface treatment of blades, in particular to a chemical milling technology for a surface plasticity deformation layer of a single crystal cast blade. The chemical milling technology comprises the following steps of: firstly, carrying out surface treatment on the blade; secondly, carrying out chemical milling treatment on the blade: carrying out chemical milling treatment on the blade by adopting a chemical milling liquid at the chemical milling temperature of 30-40DEG C, the chemical milling speed of 3.0-4.5mum / min and the chemical milling depth of 30-60mum, wherein the chemical milling liquid in unit volume comprises the following components of 150-250ml / l of nitric acid, 80-130ml / l of hydrochloric acid, 80-130ml / l of hydrofluoric acid, 150-250ml / l of ferric trichloride, 40-60ml / l of acetic acid, 0.3-1.0g / l of lauryl sodium sulfate and 15-30g / l of activated carbon; and finally, carrying out dehydrogenation treatment on the blade in dehydrogenation furnace. According to the chemical milling technology, the treated engine blade meets the requirement of the design and the use reliability of the single crystal cast blade is improved.

Description

technical field [0001] The invention relates to the technical field of blade surface treatment, in particular to a plastic deformation layer chemical milling technology on the surface of a single crystal casting blade. Background technique [0002] Single crystal casting blade manufacturing technology is one of the key technologies in the development of aero-engines. However, if a plastically deformed layer occurs during the casting process of a single crystal blade, it will directly lead to performance degradation or even failure of the blade. Once the plastic deformation layer is formed during the casting process, it will seriously affect the service life of the blade, and even cause failure. Therefore, removing the deformed layer on the surface during the casting process of single crystal blades is a technical problem that must be solved in the manufacture of single crystal casting blades. There are no patents and literature on this aspect at present. Contents of the i...

Claims

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Application Information

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IPC IPC(8): C23F1/04C30B33/10
Inventor GANG YEYANG SHULINLI HANYEDU JINGYUANLIU ZHIQIANG
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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