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Chemical milling method for titanium alloy blades

A titanium alloy blade technology, applied in the field of chemical milling of titanium alloy blades, can solve the problems of complex process steps, high temperature, low corrosion rate, etc., and achieve the effect of simple chemical milling process and easy control

Active Publication Date: 2010-05-19
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The preparation of titanium alloy blades generally includes the steps of blank preparation, pre-forging, final forging, etc. After the final forging, post-processing is required to meet the precision requirements, and the process steps are more complicated; The step of corroding the blade, its main function is to remove the pollution layer generated during the heating process of the titanium alloy, the temperature of this step is high, the corrosion rate is low, and the accuracy cannot meet the high requirements

Method used

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  • Chemical milling method for titanium alloy blades
  • Chemical milling method for titanium alloy blades

Examples

Experimental program
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Effect test

Embodiment 1

[0016] The chemical milling solution is prepared by hydrofluoric acid, nitric acid and water, and the composition of the chemical milling solution is 30% by weight of HF, HNO 3 50%, the balance being water.

[0017] Wash the final forged titanium alloy blades with water to remove surface dust, then use organic solvents to remove surface oil stains, and then soak them in hot water at 40°C to remove organic solvents.

[0018] Place the titanium alloy blade from which the organic solvent has been removed in the chemical milling solution, and immerse it at 50°C for 15 minutes.

[0019] Wash the titanium alloy blades completed by chemical milling with room temperature water to remove the residual acid solution on the surface, and then immerse in the ash removal solution for 15 minutes, wherein the composition of the ash removal solution is 20% by weight of HF, HNO 3 25%, and the balance is water.

[0020] Clean the titanium alloy blades after dust removal with room temperature ...

Embodiment 2

[0023] The chemical milling solution is prepared by hydrofluoric acid, nitric acid and water, and the composition of the chemical milling solution is 50% by weight of HF, HNO 3 30%, and the balance is water.

[0024] Wash the final forged titanium alloy blade with water to remove surface dust, then use an organic solvent to remove surface oil, and then soak it in 45°C hot water to remove the organic solvent.

[0025] Place the titanium alloy blade from which the organic solvent has been removed in the chemical milling solution, and immerse it at 60°C for 10 minutes.

[0026] Wash the titanium alloy blades completed by chemical milling with room temperature water to remove the residual acid solution on the surface, and then immerse in the deashing solution for 11 minutes, wherein the composition of the deashing solution is 30% by weight of HF, HNO 3 35%, the balance being water.

[0027] Clean the titanium alloy blades after deashing with room temperature water to remove th...

Embodiment 3

[0030] The chemical milling solution is prepared by hydrofluoric acid, nitric acid and water, and the composition of the chemical milling solution is 40% by weight of HF, HNO 3 40%, the balance being water.

[0031] Wash the final forged titanium alloy blades with water to remove surface dust, then use organic solvents to remove surface oil stains, and then soak them in 50°C hot water to remove organic solvents.

[0032] Place the titanium alloy blade from which the organic solvent has been removed in the chemical milling solution, and immerse it at 70°C for 3 minutes.

[0033] Wash the titanium alloy blades completed by chemical milling with room temperature water to remove the residual acid solution on the surface, and then immerse in the deashing solution for 3 minutes, wherein the composition of the deashing solution is 25% by weight of HF, HNO 3 30%, and the balance is water.

[0034] Clean the titanium alloy blades after dust removal with room temperature water to re...

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Abstract

The invention provides a chemical milling method for titanium alloy blades. The method is implemented according to the following steps: (1) washing a titanium alloy blade subjected to finish forging with water in order to remove surface dust, adopting organic solvent to remove surface oil stain and then removing the organic solvent; (2) immersing the titanium alloy blade after the organic solvent is removed in chemical milling solution for 3 to 15 minutes; (3) cleaning the obtained product with room-temperature water to remove residual acid solution on the surface and then immersing the obtained product in dust-removing solution for 3 to 15minutes; and (4) removing the residual acid solution on the surface of the titanium alloy blade after dust removal. The method can effectively control the rate of corroding the surface of the blade by preparing the chemical milling solution so as to allow titanium alloy blades to meet precision requirements. The whole chemical milling process is simple in method and easy to control, and can meet design requirements without machining blade discs, blade backs, inner edges and surfaces of the titanium alloy blades.

Description

technical field [0001] The invention relates to a preparation method of a blade, in particular to a chemical milling method of a titanium alloy blade. Background technique [0002] The preparation of titanium alloy blades generally includes the steps of blank preparation, pre-forging, and final forging. After the final forging, post-processing is required to meet the precision requirements. The process steps are more complicated; at the same time, titanium alloy blades are also used in the preparation process The main function of the step of corroding the blade is to remove the pollution layer produced during the heating process of the titanium alloy. The temperature of this step is relatively high, and the corrosion rate is low, and the accuracy cannot meet the high requirements. Contents of the invention [0003] In view of the above technical problems, the present invention provides a chemical milling method for titanium alloy blades, the purpose of which is to adjust t...

Claims

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Application Information

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IPC IPC(8): C23F1/26
Inventor 陈晓峰邰清安史丽坤张春刚李晗晔
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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