Precision-forging chemical-milling solution for high-temperature alloy blades and chemical milling method

A superalloy and solution technology, which is applied in the field of superalloy blade precision forging, chemical milling, and chemical milling, can solve problems such as inability to find, and achieve the effects of easy cleaning, less environmental pollution, and less impact

Inactive Publication Date: 2010-04-21
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Precision-forging chemical-milling solution for high-temperature alloy blades and chemical milling method

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Embodiment 1

[0042] This embodiment is a group of GH4169 precision forged blades, 20 in total, and it is required to remove 0.5mm of material by chemical milling.

[0043] The high-temperature alloy blade precision forging and milling solution used in this embodiment includes 55 g / L hydrochloric acid, 135 g / L nitric acid and 450 g / L ferric chloride, and the rest is water. One liter of solution is prepared as follows: first add a small amount of water to the container, take 50mL of hydrochloric acid with a specific gravity of 1.14 and 90mL of nitric acid with a specific gravity of 1.5, pour them into water, and stir evenly; weigh 450g of ferric chloride and add it, and finally add water to one liter .

[0044] In this embodiment, the specific steps of chemical milling of precision forging blades are as follows:

[0045] Step 1, size grouping: measure the blade body size of the part with an inductance meter, and the removal amount on one side is 0.5mm.

[0046] Step 2, degreasing: use wate...

Embodiment 2

[0063] This embodiment is a group of GH4169 precision forged blades, a total of 15 blades, which require 0.4mm of material removal by chemical milling.

[0064]The high-temperature alloy blade precision forging milling solution used in this embodiment includes 75g / L hydrochloric acid, 125g / L nitric acid and 400g / L ferric chloride, and the rest is water. One liter of solution is prepared as follows: first add a small amount of water to the container, take 65mL of hydrochloric acid with a specific gravity of 1.14 and 85mL of nitric acid with a specific gravity of 1.5, pour them into water, and stir evenly; weigh 400g of ferric chloride and add it, and finally add water to one liter .

[0065] In this embodiment, the specific steps of chemical milling of precision forging blades are as follows:

[0066] Step 1, size grouping: measure the leaf body size of the part with an inductance meter, and the removal amount on one side is 0.4mm.

[0067] Step 2, degreasing: use water-based...

Embodiment 3

[0084] This embodiment is a group of GH4169 precision forged blades, a total of 15 blades, which require 0.3mm of material removal by chemical milling. The high-temperature alloy blade precision forging and milling solution used in this embodiment includes 65g / L hydrochloric acid, 100g / L nitric acid and 500g / L ferric chloride, and the rest is water. One liter of solution is prepared as follows: first add a small amount of water to the container, take 57mL of hydrochloric acid with a specific gravity of 1.14 and 70mL of nitric acid with a specific gravity of 1.5, pour them into water, and stir evenly; weigh 500g of ferric chloride and add it, and finally add water to one liter .

[0085] In this embodiment, the specific steps of chemical milling of precision forging blades are as follows:

[0086] Step 1, size grouping: measure the blade body size of the part with an inductance meter, and the removal amount on one side is 0.3mm.

[0087] Step 2, degreasing: use water-based cl...

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Abstract

The invention provides a precision-forging chemical-milling solution for high-temperature alloy blades and a chemical milling method. 55 to 75 g/L of hydrochloric acid, 100 to 135 g/L of nitric acid and 400 to 500 g/L of ferric chloride are adopted to be prepared with water into a chemical milling solution, and precision-forging parts of high-temperature alloy blades are chemically milled through size grouping, oil removal, hot washing, activation, hanging ash removal, repeated chemical milling and restoring performance. The solution can effectively remove metal, and the parts chemically milled are easy to clean. The method has the chemical-milling temperature lower than 50 DEG C, has the material-removing speed approximately between 0.02 and 0.05 mm/min, and can minimize the fatigue properties of materials. The method has the advantages of little influence on material properties and capability of effectively removing metal, and the solution is low in use temperature and little in environmental pollution and has the characteristics of simple operation, safety and reliability.

Description

technical field [0001] The invention relates to the field of thermal processing, in particular to a high-temperature alloy blade precision forging chemical milling solution and a chemical milling method Background technique [0002] Most aero-engine blades are forged and processed into blanks. The quality of the forging process determines the efficiency, quality, and cost of subsequent machining. With the rapid development of the aviation industry, the extensive use of high-quality materials, and the increasing number of engine requirements, it is particularly important to improve the level of forging technology. The blade precision forging process can effectively shorten the processing time, save materials, reduce production costs, and ensure product quality and quantity. In the entire process of precision forging, the dimensional milling of parts is a key link, which determines the success or failure of the precision forging process. [0003] The chemical milling process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/16C23F1/04
Inventor 彭露袁悦刘朝
Owner AECC AVIATION POWER CO LTD
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